/ext/zlib/zlib.c
C | 5027 lines | 3125 code | 550 blank | 1352 comment | 462 complexity | e1a45e150b172a14dc9b2912e1df3ab7 MD5 | raw file
Possible License(s): LGPL-2.1, AGPL-3.0, 0BSD, Unlicense, GPL-2.0, BSD-3-Clause
- /*
- * zlib.c - An interface for zlib.
- *
- * Copyright (C) UENO Katsuhiro 2000-2003
- *
- * $Id$
- */
- #include <ruby.h>
- #include <zlib.h>
- #include <time.h>
- #include <ruby/io.h>
- #include <ruby/thread.h>
- #ifdef HAVE_VALGRIND_MEMCHECK_H
- # include <valgrind/memcheck.h>
- # ifndef VALGRIND_MAKE_MEM_DEFINED
- # define VALGRIND_MAKE_MEM_DEFINED(p, n) VALGRIND_MAKE_READABLE((p), (n))
- # endif
- # ifndef VALGRIND_MAKE_MEM_UNDEFINED
- # define VALGRIND_MAKE_MEM_UNDEFINED(p, n) VALGRIND_MAKE_WRITABLE((p), (n))
- # endif
- #else
- # define VALGRIND_MAKE_MEM_DEFINED(p, n) 0
- # define VALGRIND_MAKE_MEM_UNDEFINED(p, n) 0
- #endif
- #define RUBY_ZLIB_VERSION "1.1.0"
- #ifndef RB_PASS_CALLED_KEYWORDS
- # define rb_class_new_instance_kw(argc, argv, klass, kw_splat) rb_class_new_instance(argc, argv, klass)
- #endif
- #ifndef GZIP_SUPPORT
- #define GZIP_SUPPORT 1
- #endif
- /* from zutil.h */
- #ifndef DEF_MEM_LEVEL
- #if MAX_MEM_LEVEL >= 8
- #define DEF_MEM_LEVEL 8
- #else
- #define DEF_MEM_LEVEL MAX_MEM_LEVEL
- #endif
- #endif
- #if SIZEOF_LONG > SIZEOF_INT
- static inline uInt
- max_uint(long n)
- {
- if (n > UINT_MAX) n = UINT_MAX;
- return (uInt)n;
- }
- #define MAX_UINT(n) max_uint(n)
- #else
- #define MAX_UINT(n) (uInt)(n)
- #endif
- #define OPTHASH_GIVEN_P(opts) \
- (argc > 0 && !NIL_P((opts) = rb_check_hash_type(argv[argc-1])) && (--argc, 1))
- static ID id_dictionaries, id_read, id_buffer;
- /*--------- Prototypes --------*/
- static NORETURN(void raise_zlib_error(int, const char*));
- static VALUE rb_zlib_version(VALUE);
- static VALUE do_checksum(int, VALUE*, uLong (*)(uLong, const Bytef*, uInt));
- static VALUE rb_zlib_adler32(int, VALUE*, VALUE);
- static VALUE rb_zlib_crc32(int, VALUE*, VALUE);
- static VALUE rb_zlib_crc_table(VALUE);
- static voidpf zlib_mem_alloc(voidpf, uInt, uInt);
- static void zlib_mem_free(voidpf, voidpf);
- static void finalizer_warn(const char*);
- struct zstream;
- struct zstream_funcs;
- struct zstream_run_args;
- static void zstream_init(struct zstream*, const struct zstream_funcs*);
- static void zstream_expand_buffer(struct zstream*);
- static void zstream_expand_buffer_into(struct zstream*, unsigned long);
- static int zstream_expand_buffer_non_stream(struct zstream *z);
- static void zstream_append_buffer(struct zstream*, const Bytef*, long);
- static VALUE zstream_detach_buffer(struct zstream*);
- static VALUE zstream_shift_buffer(struct zstream*, long);
- static void zstream_buffer_ungets(struct zstream*, const Bytef*, unsigned long);
- static void zstream_buffer_ungetbyte(struct zstream*, int);
- static void zstream_append_input(struct zstream*, const Bytef*, long);
- static void zstream_discard_input(struct zstream*, long);
- static void zstream_reset_input(struct zstream*);
- static void zstream_passthrough_input(struct zstream*);
- static VALUE zstream_detach_input(struct zstream*);
- static void zstream_reset(struct zstream*);
- static VALUE zstream_end(struct zstream*);
- static VALUE zstream_ensure_end(VALUE v);
- static void zstream_run(struct zstream*, Bytef*, long, int);
- static VALUE zstream_sync(struct zstream*, Bytef*, long);
- static void zstream_mark(void*);
- static void zstream_free(void*);
- static VALUE zstream_new(VALUE, const struct zstream_funcs*);
- static struct zstream *get_zstream(VALUE);
- static void zstream_finalize(struct zstream*);
- static VALUE rb_zstream_end(VALUE);
- static VALUE rb_zstream_reset(VALUE);
- static VALUE rb_zstream_finish(VALUE);
- static VALUE rb_zstream_flush_next_in(VALUE);
- static VALUE rb_zstream_flush_next_out(VALUE);
- static VALUE rb_zstream_avail_out(VALUE);
- static VALUE rb_zstream_set_avail_out(VALUE, VALUE);
- static VALUE rb_zstream_avail_in(VALUE);
- static VALUE rb_zstream_total_in(VALUE);
- static VALUE rb_zstream_total_out(VALUE);
- static VALUE rb_zstream_data_type(VALUE);
- static VALUE rb_zstream_adler(VALUE);
- static VALUE rb_zstream_finished_p(VALUE);
- static VALUE rb_zstream_closed_p(VALUE);
- static VALUE rb_deflate_s_allocate(VALUE);
- static VALUE rb_deflate_initialize(int, VALUE*, VALUE);
- static VALUE rb_deflate_init_copy(VALUE, VALUE);
- static VALUE deflate_run(VALUE);
- static VALUE rb_deflate_s_deflate(int, VALUE*, VALUE);
- static void do_deflate(struct zstream*, VALUE, int);
- static VALUE rb_deflate_deflate(int, VALUE*, VALUE);
- static VALUE rb_deflate_addstr(VALUE, VALUE);
- static VALUE rb_deflate_flush(int, VALUE*, VALUE);
- static VALUE rb_deflate_params(VALUE, VALUE, VALUE);
- static VALUE rb_deflate_set_dictionary(VALUE, VALUE);
- static VALUE inflate_run(VALUE);
- static VALUE rb_inflate_s_allocate(VALUE);
- static VALUE rb_inflate_initialize(int, VALUE*, VALUE);
- static VALUE rb_inflate_s_inflate(VALUE, VALUE);
- static void do_inflate(struct zstream*, VALUE);
- static VALUE rb_inflate_inflate(int, VALUE*, VALUE);
- static VALUE rb_inflate_addstr(VALUE, VALUE);
- static VALUE rb_inflate_sync(VALUE, VALUE);
- static VALUE rb_inflate_sync_point_p(VALUE);
- static VALUE rb_inflate_set_dictionary(VALUE, VALUE);
- #if GZIP_SUPPORT
- struct gzfile;
- static void gzfile_mark(void*);
- static void gzfile_free(void*);
- static VALUE gzfile_new(VALUE, const struct zstream_funcs*, void (*) _((struct gzfile*)));
- static void gzfile_reset(struct gzfile*);
- static void gzfile_close(struct gzfile*, int);
- static void gzfile_write_raw(struct gzfile*);
- static VALUE gzfile_read_raw_partial(VALUE);
- static VALUE gzfile_read_raw_rescue(VALUE,VALUE);
- static VALUE gzfile_read_raw(struct gzfile*, VALUE outbuf);
- static int gzfile_read_raw_ensure(struct gzfile*, long, VALUE outbuf);
- static char *gzfile_read_raw_until_zero(struct gzfile*, long);
- static unsigned int gzfile_get16(const unsigned char*);
- static unsigned long gzfile_get32(const unsigned char*);
- static void gzfile_set32(unsigned long n, unsigned char*);
- static void gzfile_make_header(struct gzfile*);
- static void gzfile_make_footer(struct gzfile*);
- static void gzfile_read_header(struct gzfile*, VALUE outbuf);
- static void gzfile_check_footer(struct gzfile*, VALUE outbuf);
- static void gzfile_write(struct gzfile*, Bytef*, long);
- static long gzfile_read_more(struct gzfile*, VALUE outbuf);
- static void gzfile_calc_crc(struct gzfile*, VALUE);
- static VALUE gzfile_read(struct gzfile*, long);
- static VALUE gzfile_read_all(struct gzfile*);
- static void gzfile_ungets(struct gzfile*, const Bytef*, long);
- static void gzfile_ungetbyte(struct gzfile*, int);
- static VALUE gzfile_writer_end_run(VALUE);
- static void gzfile_writer_end(struct gzfile*);
- static VALUE gzfile_reader_end_run(VALUE);
- static void gzfile_reader_end(struct gzfile*);
- static void gzfile_reader_rewind(struct gzfile*);
- static VALUE gzfile_reader_get_unused(struct gzfile*);
- static struct gzfile *get_gzfile(VALUE);
- static VALUE gzfile_ensure_close(VALUE);
- static VALUE rb_gzfile_s_wrap(int, VALUE*, VALUE);
- static VALUE gzfile_s_open(int, VALUE*, VALUE, const char*);
- NORETURN(static void gzfile_raise(struct gzfile *, VALUE, const char *));
- static VALUE gzfile_error_inspect(VALUE);
- static VALUE rb_gzfile_to_io(VALUE);
- static VALUE rb_gzfile_crc(VALUE);
- static VALUE rb_gzfile_mtime(VALUE);
- static VALUE rb_gzfile_level(VALUE);
- static VALUE rb_gzfile_os_code(VALUE);
- static VALUE rb_gzfile_orig_name(VALUE);
- static VALUE rb_gzfile_comment(VALUE);
- static VALUE rb_gzfile_lineno(VALUE);
- static VALUE rb_gzfile_set_lineno(VALUE, VALUE);
- static VALUE rb_gzfile_set_mtime(VALUE, VALUE);
- static VALUE rb_gzfile_set_orig_name(VALUE, VALUE);
- static VALUE rb_gzfile_set_comment(VALUE, VALUE);
- static VALUE rb_gzfile_close(VALUE);
- static VALUE rb_gzfile_finish(VALUE);
- static VALUE rb_gzfile_closed_p(VALUE);
- static VALUE rb_gzfile_eof_p(VALUE);
- static VALUE rb_gzfile_sync(VALUE);
- static VALUE rb_gzfile_set_sync(VALUE, VALUE);
- static VALUE rb_gzfile_total_in(VALUE);
- static VALUE rb_gzfile_total_out(VALUE);
- static VALUE rb_gzfile_path(VALUE);
- static VALUE rb_gzwriter_s_allocate(VALUE);
- static VALUE rb_gzwriter_s_open(int, VALUE*, VALUE);
- static VALUE rb_gzwriter_initialize(int, VALUE*, VALUE);
- static VALUE rb_gzwriter_flush(int, VALUE*, VALUE);
- static VALUE rb_gzwriter_write(int, VALUE*, VALUE);
- static VALUE rb_gzwriter_putc(VALUE, VALUE);
- static VALUE rb_gzreader_s_allocate(VALUE);
- static VALUE rb_gzreader_s_open(int, VALUE*, VALUE);
- static VALUE rb_gzreader_initialize(int, VALUE*, VALUE);
- static VALUE rb_gzreader_rewind(VALUE);
- static VALUE rb_gzreader_unused(VALUE);
- static VALUE rb_gzreader_read(int, VALUE*, VALUE);
- static VALUE rb_gzreader_getc(VALUE);
- static VALUE rb_gzreader_readchar(VALUE);
- static VALUE rb_gzreader_each_byte(VALUE);
- static VALUE rb_gzreader_ungetc(VALUE, VALUE);
- static VALUE rb_gzreader_ungetbyte(VALUE, VALUE);
- static void gzreader_skip_linebreaks(struct gzfile*);
- static VALUE gzreader_gets(int, VALUE*, VALUE);
- static VALUE rb_gzreader_gets(int, VALUE*, VALUE);
- static VALUE rb_gzreader_readline(int, VALUE*, VALUE);
- static VALUE rb_gzreader_each(int, VALUE*, VALUE);
- static VALUE rb_gzreader_readlines(int, VALUE*, VALUE);
- #endif /* GZIP_SUPPORT */
- /*
- * Document-module: Zlib
- *
- * This module provides access to the {zlib library}[http://zlib.net]. Zlib is
- * designed to be a portable, free, general-purpose, legally unencumbered --
- * that is, not covered by any patents -- lossless data-compression library
- * for use on virtually any computer hardware and operating system.
- *
- * The zlib compression library provides in-memory compression and
- * decompression functions, including integrity checks of the uncompressed
- * data.
- *
- * The zlib compressed data format is described in RFC 1950, which is a
- * wrapper around a deflate stream which is described in RFC 1951.
- *
- * The library also supports reading and writing files in gzip (.gz) format
- * with an interface similar to that of IO. The gzip format is described in
- * RFC 1952 which is also a wrapper around a deflate stream.
- *
- * The zlib format was designed to be compact and fast for use in memory and on
- * communications channels. The gzip format was designed for single-file
- * compression on file systems, has a larger header than zlib to maintain
- * directory information, and uses a different, slower check method than zlib.
- *
- * See your system's zlib.h for further information about zlib
- *
- * == Sample usage
- *
- * Using the wrapper to compress strings with default parameters is quite
- * simple:
- *
- * require "zlib"
- *
- * data_to_compress = File.read("don_quixote.txt")
- *
- * puts "Input size: #{data_to_compress.size}"
- * #=> Input size: 2347740
- *
- * data_compressed = Zlib::Deflate.deflate(data_to_compress)
- *
- * puts "Compressed size: #{data_compressed.size}"
- * #=> Compressed size: 887238
- *
- * uncompressed_data = Zlib::Inflate.inflate(data_compressed)
- *
- * puts "Uncompressed data is: #{uncompressed_data}"
- * #=> Uncompressed data is: The Project Gutenberg EBook of Don Quixote...
- *
- * == Class tree
- *
- * - Zlib::Deflate
- * - Zlib::Inflate
- * - Zlib::ZStream
- * - Zlib::Error
- * - Zlib::StreamEnd
- * - Zlib::NeedDict
- * - Zlib::DataError
- * - Zlib::StreamError
- * - Zlib::MemError
- * - Zlib::BufError
- * - Zlib::VersionError
- *
- * (if you have GZIP_SUPPORT)
- * - Zlib::GzipReader
- * - Zlib::GzipWriter
- * - Zlib::GzipFile
- * - Zlib::GzipFile::Error
- * - Zlib::GzipFile::LengthError
- * - Zlib::GzipFile::CRCError
- * - Zlib::GzipFile::NoFooter
- *
- */
- void Init_zlib(void);
- /*--------- Exceptions --------*/
- static VALUE cZError, cStreamEnd, cNeedDict;
- static VALUE cStreamError, cDataError, cMemError, cBufError, cVersionError;
- static void
- raise_zlib_error(int err, const char *msg)
- {
- VALUE exc;
- if (!msg) {
- msg = zError(err);
- }
- switch(err) {
- case Z_STREAM_END:
- exc = rb_exc_new2(cStreamEnd, msg);
- break;
- case Z_NEED_DICT:
- exc = rb_exc_new2(cNeedDict, msg);
- break;
- case Z_STREAM_ERROR:
- exc = rb_exc_new2(cStreamError, msg);
- break;
- case Z_DATA_ERROR:
- exc = rb_exc_new2(cDataError, msg);
- break;
- case Z_BUF_ERROR:
- exc = rb_exc_new2(cBufError, msg);
- break;
- case Z_VERSION_ERROR:
- exc = rb_exc_new2(cVersionError, msg);
- break;
- case Z_MEM_ERROR:
- exc = rb_exc_new2(cMemError, msg);
- break;
- case Z_ERRNO:
- rb_sys_fail(msg);
- /* no return */
- default:
- exc = rb_exc_new_str(cZError,
- rb_sprintf("unknown zlib error %d: %s", err, msg));
- }
- rb_exc_raise(exc);
- }
- /*--- Warning (in finalizer) ---*/
- static void
- finalizer_warn(const char *msg)
- {
- #if 0
- fprintf(stderr, "zlib(finalizer): %s\n", msg);
- #endif
- }
- /*-------- module Zlib --------*/
- /*
- * Document-method: Zlib.zlib_version
- *
- * Returns the string which represents the version of zlib library.
- */
- static VALUE
- rb_zlib_version(VALUE klass)
- {
- return rb_str_new2(zlibVersion());
- }
- #if SIZEOF_LONG > SIZEOF_INT
- static uLong
- checksum_long(uLong (*func)(uLong, const Bytef*, uInt), uLong sum, const Bytef *ptr, long len)
- {
- if (len > UINT_MAX) {
- do {
- sum = func(sum, ptr, UINT_MAX);
- ptr += UINT_MAX;
- len -= UINT_MAX;
- } while (len >= UINT_MAX);
- }
- if (len > 0) sum = func(sum, ptr, (uInt)len);
- return sum;
- }
- #else
- #define checksum_long(func, sum, ptr, len) (func)((sum), (ptr), (len))
- #endif
- static VALUE
- do_checksum(int argc, VALUE *argv, uLong (*func)(uLong, const Bytef*, uInt))
- {
- VALUE str, vsum;
- unsigned long sum;
- rb_scan_args(argc, argv, "02", &str, &vsum);
- if (!NIL_P(vsum)) {
- sum = NUM2ULONG(vsum);
- }
- else if (NIL_P(str)) {
- sum = 0;
- }
- else {
- sum = func(0, Z_NULL, 0);
- }
- if (NIL_P(str)) {
- sum = func(sum, Z_NULL, 0);
- }
- else if (rb_obj_is_kind_of(str, rb_cIO)) {
- VALUE buf;
- VALUE buflen = INT2NUM(8192);
- while (!NIL_P(buf = rb_funcall(str, id_read, 1, buflen))) {
- StringValue(buf);
- sum = checksum_long(func, sum, (Bytef*)RSTRING_PTR(buf), RSTRING_LEN(buf));
- }
- }
- else {
- StringValue(str);
- sum = checksum_long(func, sum, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str));
- }
- return rb_uint2inum(sum);
- }
- /*
- * Document-method: Zlib.adler32
- *
- * call-seq: Zlib.adler32(string, adler)
- *
- * Calculates Adler-32 checksum for +string+, and returns updated value of
- * +adler+. If +string+ is omitted, it returns the Adler-32 initial value. If
- * +adler+ is omitted, it assumes that the initial value is given to +adler+.
- * If +string+ is an IO instance, reads from the IO until the IO returns nil
- * and returns Adler-32 of all read data.
- *
- * Example usage:
- *
- * require "zlib"
- *
- * data = "foo"
- * puts "Adler32 checksum: #{Zlib.adler32(data).to_s(16)}"
- * #=> Adler32 checksum: 2820145
- *
- */
- static VALUE
- rb_zlib_adler32(int argc, VALUE *argv, VALUE klass)
- {
- return do_checksum(argc, argv, adler32);
- }
- #ifdef HAVE_ADLER32_COMBINE
- /*
- * Document-method: Zlib.adler32_combine
- *
- * call-seq: Zlib.adler32_combine(adler1, adler2, len2)
- *
- * Combine two Adler-32 check values in to one. +alder1+ is the first Adler-32
- * value, +adler2+ is the second Adler-32 value. +len2+ is the length of the
- * string used to generate +adler2+.
- *
- */
- static VALUE
- rb_zlib_adler32_combine(VALUE klass, VALUE adler1, VALUE adler2, VALUE len2)
- {
- return ULONG2NUM(
- adler32_combine(NUM2ULONG(adler1), NUM2ULONG(adler2), NUM2LONG(len2)));
- }
- #else
- #define rb_zlib_adler32_combine rb_f_notimplement
- #endif
- /*
- * Document-method: Zlib.crc32
- *
- * call-seq: Zlib.crc32(string, crc)
- *
- * Calculates CRC checksum for +string+, and returns updated value of +crc+. If
- * +string+ is omitted, it returns the CRC initial value. If +crc+ is omitted, it
- * assumes that the initial value is given to +crc+. If +string+ is an IO instance,
- * reads from the IO until the IO returns nil and returns CRC checksum of all read
- * data.
- *
- * FIXME: expression.
- */
- static VALUE
- rb_zlib_crc32(int argc, VALUE *argv, VALUE klass)
- {
- return do_checksum(argc, argv, crc32);
- }
- #ifdef HAVE_CRC32_COMBINE
- /*
- * Document-method: Zlib.crc32_combine
- *
- * call-seq: Zlib.crc32_combine(crc1, crc2, len2)
- *
- * Combine two CRC-32 check values in to one. +crc1+ is the first CRC-32
- * value, +crc2+ is the second CRC-32 value. +len2+ is the length of the
- * string used to generate +crc2+.
- *
- */
- static VALUE
- rb_zlib_crc32_combine(VALUE klass, VALUE crc1, VALUE crc2, VALUE len2)
- {
- return ULONG2NUM(
- crc32_combine(NUM2ULONG(crc1), NUM2ULONG(crc2), NUM2LONG(len2)));
- }
- #else
- #define rb_zlib_crc32_combine rb_f_notimplement
- #endif
- /*
- * Document-method: Zlib.crc_table
- *
- * Returns the table for calculating CRC checksum as an array.
- */
- static VALUE
- rb_zlib_crc_table(VALUE obj)
- {
- #if !defined(HAVE_TYPE_Z_CRC_T)
- /* z_crc_t is defined since zlib-1.2.7. */
- typedef unsigned long z_crc_t;
- #endif
- const z_crc_t *crctbl;
- VALUE dst;
- int i;
- crctbl = get_crc_table();
- dst = rb_ary_new2(256);
- for (i = 0; i < 256; i++) {
- rb_ary_push(dst, rb_uint2inum(crctbl[i]));
- }
- return dst;
- }
- /*-------- zstream - internal APIs --------*/
- struct zstream {
- unsigned long flags;
- VALUE buf;
- VALUE input;
- VALUE mutex;
- z_stream stream;
- const struct zstream_funcs {
- int (*reset)(z_streamp);
- int (*end)(z_streamp);
- int (*run)(z_streamp, int);
- } *func;
- };
- #define ZSTREAM_FLAG_READY 0x1
- #define ZSTREAM_FLAG_IN_STREAM 0x2
- #define ZSTREAM_FLAG_FINISHED 0x4
- #define ZSTREAM_FLAG_CLOSING 0x8
- #define ZSTREAM_FLAG_GZFILE 0x10 /* disallows yield from expand_buffer for
- gzip*/
- #define ZSTREAM_REUSE_BUFFER 0x20
- #define ZSTREAM_FLAG_UNUSED 0x40
- #define ZSTREAM_READY(z) ((z)->flags |= ZSTREAM_FLAG_READY)
- #define ZSTREAM_IS_READY(z) ((z)->flags & ZSTREAM_FLAG_READY)
- #define ZSTREAM_IS_FINISHED(z) ((z)->flags & ZSTREAM_FLAG_FINISHED)
- #define ZSTREAM_IS_CLOSING(z) ((z)->flags & ZSTREAM_FLAG_CLOSING)
- #define ZSTREAM_IS_GZFILE(z) ((z)->flags & ZSTREAM_FLAG_GZFILE)
- #define ZSTREAM_BUF_FILLED(z) (NIL_P((z)->buf) ? 0 : RSTRING_LEN((z)->buf))
- #define ZSTREAM_REUSE_BUFFER_P(z) ((z)->flags & ZSTREAM_REUSE_BUFFER)
- #define ZSTREAM_EXPAND_BUFFER_OK 0
- /* I think that more better value should be found,
- but I gave up finding it. B) */
- #define ZSTREAM_INITIAL_BUFSIZE 1024
- /* Allow a quick return when the thread is interrupted */
- #define ZSTREAM_AVAIL_OUT_STEP_MAX 16384
- #define ZSTREAM_AVAIL_OUT_STEP_MIN 2048
- static const struct zstream_funcs deflate_funcs = {
- deflateReset, deflateEnd, deflate,
- };
- static const struct zstream_funcs inflate_funcs = {
- inflateReset, inflateEnd, inflate,
- };
- struct zstream_run_args {
- struct zstream * z;
- int flush; /* stream flush value for inflate() or deflate() */
- int interrupt; /* stop processing the stream and return to ruby */
- int jump_state; /* for buffer expansion block break or exception */
- int stream_output; /* for streaming zlib processing */
- };
- static voidpf
- zlib_mem_alloc(voidpf opaque, uInt items, uInt size)
- {
- voidpf p = xmalloc2(items, size);
- /* zlib FAQ: Valgrind (or some similar memory access checker) says that
- deflate is performing a conditional jump that depends on an
- uninitialized value. Isn't that a bug?
- http://www.zlib.net/zlib_faq.html#faq36 */
- (void)VALGRIND_MAKE_MEM_DEFINED(p, items * size);
- return p;
- }
- static void
- zlib_mem_free(voidpf opaque, voidpf address)
- {
- xfree(address);
- }
- static void
- zstream_init(struct zstream *z, const struct zstream_funcs *func)
- {
- z->flags = 0;
- z->buf = Qnil;
- z->input = Qnil;
- z->mutex = rb_mutex_new();
- z->stream.zalloc = zlib_mem_alloc;
- z->stream.zfree = zlib_mem_free;
- z->stream.opaque = Z_NULL;
- z->stream.msg = Z_NULL;
- z->stream.next_in = Z_NULL;
- z->stream.avail_in = 0;
- z->stream.next_out = Z_NULL;
- z->stream.avail_out = 0;
- z->func = func;
- }
- #define zstream_init_deflate(z) zstream_init((z), &deflate_funcs)
- #define zstream_init_inflate(z) zstream_init((z), &inflate_funcs)
- static void
- zstream_expand_buffer(struct zstream *z)
- {
- if (NIL_P(z->buf)) {
- zstream_expand_buffer_into(z, ZSTREAM_INITIAL_BUFSIZE);
- return;
- }
- if (!ZSTREAM_IS_GZFILE(z) && rb_block_given_p()) {
- long buf_filled = ZSTREAM_BUF_FILLED(z);
- if (buf_filled >= ZSTREAM_AVAIL_OUT_STEP_MAX) {
- int state = 0;
- if (!ZSTREAM_REUSE_BUFFER_P(z)) {
- rb_obj_reveal(z->buf, rb_cString);
- }
- rb_mutex_unlock(z->mutex);
- rb_protect(rb_yield, z->buf, &state);
- rb_mutex_lock(z->mutex);
- if (ZSTREAM_REUSE_BUFFER_P(z)) {
- rb_str_modify(z->buf);
- rb_str_set_len(z->buf, 0);
- }
- else {
- z->buf = Qnil;
- }
- zstream_expand_buffer_into(z, ZSTREAM_AVAIL_OUT_STEP_MAX);
- if (state)
- rb_jump_tag(state);
- return;
- }
- else {
- zstream_expand_buffer_into(z,
- ZSTREAM_AVAIL_OUT_STEP_MAX - buf_filled);
- }
- }
- else {
- zstream_expand_buffer_non_stream(z);
- }
- }
- static void
- zstream_expand_buffer_into(struct zstream *z, unsigned long size)
- {
- if (NIL_P(z->buf)) {
- /* I uses rb_str_new here not rb_str_buf_new because
- rb_str_buf_new makes a zero-length string. */
- z->buf = rb_str_buf_new(size);
- z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf);
- z->stream.avail_out = MAX_UINT(size);
- rb_obj_hide(z->buf);
- }
- else if (z->stream.avail_out != size) {
- rb_str_modify_expand(z->buf, size);
- z->stream.next_out = (Bytef*)RSTRING_END(z->buf);
- z->stream.avail_out = MAX_UINT(size);
- }
- }
- static void *
- zstream_expand_buffer_protect(void *ptr)
- {
- struct zstream *z = (struct zstream *)ptr;
- int state = 0;
- rb_protect((VALUE (*)(VALUE))zstream_expand_buffer, (VALUE)z, &state);
- return (void *)(VALUE)state;
- }
- static int
- zstream_expand_buffer_non_stream(struct zstream *z)
- {
- long inc, len = ZSTREAM_BUF_FILLED(z);
- if (rb_str_capacity(z->buf) - len >= ZSTREAM_AVAIL_OUT_STEP_MAX) {
- z->stream.avail_out = ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
- else {
- inc = len / 2;
- if (inc < ZSTREAM_AVAIL_OUT_STEP_MIN) {
- inc = ZSTREAM_AVAIL_OUT_STEP_MIN;
- }
- rb_str_modify_expand(z->buf, inc);
- z->stream.avail_out = (inc < ZSTREAM_AVAIL_OUT_STEP_MAX) ?
- (int)inc : ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
- z->stream.next_out = (Bytef*)RSTRING_END(z->buf);
- return ZSTREAM_EXPAND_BUFFER_OK;
- }
- static void
- zstream_append_buffer(struct zstream *z, const Bytef *src, long len)
- {
- if (NIL_P(z->buf)) {
- z->buf = rb_str_buf_new(len);
- rb_str_buf_cat(z->buf, (const char*)src, len);
- z->stream.next_out = (Bytef*)RSTRING_PTR(z->buf);
- z->stream.avail_out = 0;
- rb_obj_hide(z->buf);
- return;
- }
- if ((long)rb_str_capacity(z->buf) < ZSTREAM_BUF_FILLED(z) + len) {
- rb_str_modify_expand(z->buf, len);
- z->stream.avail_out = 0;
- }
- else {
- if (z->stream.avail_out >= (uInt)len) {
- z->stream.avail_out -= (uInt)len;
- }
- else {
- z->stream.avail_out = 0;
- }
- }
- rb_str_cat(z->buf, (const char *)src, len);
- z->stream.next_out = (Bytef*)RSTRING_END(z->buf);
- }
- #define zstream_append_buffer2(z,v) \
- zstream_append_buffer((z),(Bytef*)RSTRING_PTR(v),RSTRING_LEN(v))
- static VALUE
- zstream_detach_buffer(struct zstream *z)
- {
- VALUE dst;
- if (!ZSTREAM_IS_FINISHED(z) && !ZSTREAM_IS_GZFILE(z) &&
- rb_block_given_p()) {
- /* prevent tiny yields mid-stream, save for next
- * zstream_expand_buffer() or stream end */
- return Qnil;
- }
- if (NIL_P(z->buf)) {
- dst = rb_str_new(0, 0);
- }
- else {
- dst = z->buf;
- if (!ZSTREAM_REUSE_BUFFER_P(z)) {
- rb_obj_reveal(dst, rb_cString);
- }
- }
- z->buf = Qnil;
- z->stream.next_out = 0;
- z->stream.avail_out = 0;
- if (!ZSTREAM_IS_GZFILE(z) && rb_block_given_p()) {
- rb_yield(dst);
- dst = Qnil;
- }
- return dst;
- }
- static VALUE
- zstream_shift_buffer(struct zstream *z, long len)
- {
- VALUE dst;
- char *bufptr;
- long buflen = ZSTREAM_BUF_FILLED(z);
- if (buflen <= len) {
- return zstream_detach_buffer(z);
- }
- bufptr = RSTRING_PTR(z->buf);
- dst = rb_str_new(bufptr, len);
- buflen -= len;
- memmove(bufptr, bufptr + len, buflen);
- rb_str_set_len(z->buf, buflen);
- z->stream.next_out = (Bytef*)RSTRING_END(z->buf);
- buflen = (long)rb_str_capacity(z->buf) - ZSTREAM_BUF_FILLED(z);
- if (buflen > ZSTREAM_AVAIL_OUT_STEP_MAX) {
- buflen = ZSTREAM_AVAIL_OUT_STEP_MAX;
- }
- z->stream.avail_out = (uInt)buflen;
- return dst;
- }
- static void
- zstream_buffer_ungets(struct zstream *z, const Bytef *b, unsigned long len)
- {
- char *bufptr;
- long filled;
- if (NIL_P(z->buf) || (long)rb_str_capacity(z->buf) <= ZSTREAM_BUF_FILLED(z)) {
- zstream_expand_buffer_into(z, len);
- }
- RSTRING_GETMEM(z->buf, bufptr, filled);
- memmove(bufptr + len, bufptr, filled);
- memmove(bufptr, b, len);
- rb_str_set_len(z->buf, filled + len);
- if (z->stream.avail_out > 0) {
- if (len > z->stream.avail_out) len = z->stream.avail_out;
- z->stream.next_out+=len;
- z->stream.avail_out-=(uInt)len;
- }
- }
- static void
- zstream_buffer_ungetbyte(struct zstream *z, int c)
- {
- Bytef cc = (Bytef)c;
- zstream_buffer_ungets(z, &cc, 1);
- }
- static void
- zstream_append_input(struct zstream *z, const Bytef *src, long len)
- {
- if (len <= 0) return;
- if (NIL_P(z->input)) {
- z->input = rb_str_buf_new(len);
- rb_str_buf_cat(z->input, (const char*)src, len);
- rb_obj_hide(z->input);
- }
- else {
- rb_str_buf_cat(z->input, (const char*)src, len);
- }
- }
- #define zstream_append_input2(z,v)\
- RB_GC_GUARD(v),\
- zstream_append_input((z), (Bytef*)RSTRING_PTR(v), RSTRING_LEN(v))
- static void
- zstream_discard_input(struct zstream *z, long len)
- {
- if (NIL_P(z->input)) {
- }
- else if (RBASIC_CLASS(z->input) == 0) {
- /* hidden, we created z->input and have complete control */
- char *ptr;
- long oldlen, newlen;
- RSTRING_GETMEM(z->input, ptr, oldlen);
- newlen = oldlen - len;
- if (newlen > 0) {
- memmove(ptr, ptr + len, newlen);
- }
- if (newlen < 0) {
- newlen = 0;
- }
- rb_str_resize(z->input, newlen);
- if (newlen == 0) {
- rb_gc_force_recycle(z->input);
- z->input = Qnil;
- }
- else {
- rb_str_set_len(z->input, newlen);
- }
- }
- else { /* do not mangle user-provided data */
- if (RSTRING_LEN(z->input) <= len) {
- z->input = Qnil;
- }
- else {
- z->input = rb_str_substr(z->input, len,
- RSTRING_LEN(z->input) - len);
- }
- }
- }
- static void
- zstream_reset_input(struct zstream *z)
- {
- if (!NIL_P(z->input) && RBASIC_CLASS(z->input) == 0) {
- rb_str_resize(z->input, 0);
- }
- else {
- z->input = Qnil;
- }
- }
- static void
- zstream_passthrough_input(struct zstream *z)
- {
- if (!NIL_P(z->input)) {
- zstream_append_buffer2(z, z->input);
- z->input = Qnil;
- }
- }
- static VALUE
- zstream_detach_input(struct zstream *z)
- {
- VALUE dst;
- if (NIL_P(z->input)) {
- dst = rb_str_new(0, 0);
- }
- else {
- dst = z->input;
- rb_obj_reveal(dst, rb_cString);
- }
- z->input = Qnil;
- return dst;
- }
- static void
- zstream_reset(struct zstream *z)
- {
- int err;
- err = z->func->reset(&z->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- z->flags = ZSTREAM_FLAG_READY;
- z->buf = Qnil;
- z->stream.next_out = 0;
- z->stream.avail_out = 0;
- zstream_reset_input(z);
- }
- static VALUE
- zstream_end(struct zstream *z)
- {
- int err;
- if (!ZSTREAM_IS_READY(z)) {
- rb_warning("attempt to close uninitialized zstream; ignored.");
- return Qnil;
- }
- if (z->flags & ZSTREAM_FLAG_IN_STREAM) {
- rb_warning("attempt to close unfinished zstream; reset forced.");
- zstream_reset(z);
- }
- zstream_reset_input(z);
- err = z->func->end(&z->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- z->flags = 0;
- return Qnil;
- }
- static VALUE
- zstream_ensure_end(VALUE v)
- {
- return zstream_end((struct zstream *)v);
- }
- static void *
- zstream_run_func(void *ptr)
- {
- struct zstream_run_args *args = (struct zstream_run_args *)ptr;
- int err, state, flush = args->flush;
- struct zstream *z = args->z;
- uInt n;
- err = Z_OK;
- while (!args->interrupt) {
- n = z->stream.avail_out;
- err = z->func->run(&z->stream, flush);
- rb_str_set_len(z->buf, ZSTREAM_BUF_FILLED(z) + (n - z->stream.avail_out));
- if (err == Z_STREAM_END) {
- z->flags &= ~ZSTREAM_FLAG_IN_STREAM;
- z->flags |= ZSTREAM_FLAG_FINISHED;
- break;
- }
- if (err != Z_OK && err != Z_BUF_ERROR)
- break;
- if (z->stream.avail_out > 0) {
- z->flags |= ZSTREAM_FLAG_IN_STREAM;
- break;
- }
- if (z->stream.avail_in == 0 && z->func == &inflate_funcs) {
- /* break here because inflate() return Z_BUF_ERROR when avail_in == 0. */
- /* but deflate() could be called with avail_in == 0 (there's hidden buffer
- in zstream->state) */
- z->flags |= ZSTREAM_FLAG_IN_STREAM;
- break;
- }
- if (args->stream_output) {
- state = (int)(VALUE)rb_thread_call_with_gvl(zstream_expand_buffer_protect,
- (void *)z);
- }
- else {
- state = zstream_expand_buffer_non_stream(z);
- }
- if (state) {
- err = Z_OK; /* buffer expanded but stream processing was stopped */
- args->jump_state = state;
- break;
- }
- }
- return (void *)(VALUE)err;
- }
- /*
- * There is no safe way to interrupt z->run->func().
- * async-signal-safe
- */
- static void
- zstream_unblock_func(void *ptr)
- {
- struct zstream_run_args *args = (struct zstream_run_args *)ptr;
- args->interrupt = 1;
- }
- static void
- zstream_run0(struct zstream *z, Bytef *src, long len, int flush)
- {
- struct zstream_run_args args;
- int err;
- VALUE old_input = Qnil;
- args.z = z;
- args.flush = flush;
- args.interrupt = 0;
- args.jump_state = 0;
- args.stream_output = !ZSTREAM_IS_GZFILE(z) && rb_block_given_p();
- if (NIL_P(z->input) && len == 0) {
- z->stream.next_in = (Bytef*)"";
- z->stream.avail_in = 0;
- }
- else {
- zstream_append_input(z, src, len);
- /* keep reference to `z->input' so as not to be garbage collected
- after zstream_reset_input() and prevent `z->stream.next_in'
- from dangling. */
- old_input = zstream_detach_input(z);
- rb_obj_hide(old_input); /* for GVL release and later recycle */
- z->stream.next_in = (Bytef*)RSTRING_PTR(old_input);
- z->stream.avail_in = MAX_UINT(RSTRING_LEN(old_input));
- }
- if (z->stream.avail_out == 0) {
- zstream_expand_buffer(z);
- }
- loop:
- #ifndef RB_NOGVL_UBF_ASYNC_SAFE
- err = (int)(VALUE)rb_thread_call_without_gvl(zstream_run_func, (void *)&args,
- zstream_unblock_func, (void *)&args);
- #else
- err = (int)(VALUE)rb_nogvl(zstream_run_func, (void *)&args,
- zstream_unblock_func, (void *)&args,
- RB_NOGVL_UBF_ASYNC_SAFE);
- #endif
- /* retry if no exception is thrown */
- if (err == Z_OK && args.interrupt) {
- args.interrupt = 0;
- goto loop;
- }
- if (flush != Z_FINISH && err == Z_BUF_ERROR
- && z->stream.avail_out > 0) {
- z->flags |= ZSTREAM_FLAG_IN_STREAM;
- }
- zstream_reset_input(z);
- if (err != Z_OK && err != Z_STREAM_END) {
- if (z->stream.avail_in > 0) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- }
- if (err == Z_NEED_DICT) {
- VALUE self = (VALUE)z->stream.opaque;
- if (self) {
- VALUE dicts = rb_ivar_get(self, id_dictionaries);
- VALUE dict = rb_hash_aref(dicts, rb_uint2inum(z->stream.adler));
- if (!NIL_P(dict)) {
- rb_inflate_set_dictionary(self, dict);
- goto loop;
- }
- }
- }
- raise_zlib_error(err, z->stream.msg);
- }
- if (z->stream.avail_in > 0) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- }
- if (!NIL_P(old_input)) {
- rb_str_resize(old_input, 0);
- rb_gc_force_recycle(old_input);
- }
- if (args.jump_state)
- rb_jump_tag(args.jump_state);
- }
- struct zstream_run_synchronized_args {
- struct zstream *z;
- Bytef *src;
- long len;
- int flush;
- };
- static VALUE
- zstream_run_synchronized(VALUE value_arg)
- {
- struct zstream_run_synchronized_args *run_args = (struct zstream_run_synchronized_args *)value_arg;
- zstream_run0(run_args->z, run_args->src, run_args->len, run_args->flush);
- return Qnil;
- }
- static void
- zstream_run(struct zstream *z, Bytef *src, long len, int flush)
- {
- struct zstream_run_synchronized_args run_args;
- run_args.z = z;
- run_args.src = src;
- run_args.len = len;
- run_args.flush = flush;
- rb_mutex_synchronize(z->mutex, zstream_run_synchronized, (VALUE)&run_args);
- }
- static VALUE
- zstream_sync(struct zstream *z, Bytef *src, long len)
- {
- /* VALUE rest; */
- int err;
- if (!NIL_P(z->input)) {
- z->stream.next_in = (Bytef*)RSTRING_PTR(z->input);
- z->stream.avail_in = MAX_UINT(RSTRING_LEN(z->input));
- err = inflateSync(&z->stream);
- if (err == Z_OK) {
- zstream_discard_input(z,
- RSTRING_LEN(z->input) - z->stream.avail_in);
- zstream_append_input(z, src, len);
- return Qtrue;
- }
- zstream_reset_input(z);
- if (err != Z_DATA_ERROR) {
- /* rest = rb_str_new((char*)z->stream.next_in, z->stream.avail_in); */
- raise_zlib_error(err, z->stream.msg);
- }
- }
- if (len <= 0) return Qfalse;
- z->stream.next_in = src;
- z->stream.avail_in = MAX_UINT(len);
- err = inflateSync(&z->stream);
- if (err == Z_OK) {
- zstream_append_input(z, z->stream.next_in, z->stream.avail_in);
- return Qtrue;
- }
- if (err != Z_DATA_ERROR) {
- /* rest = rb_str_new((char*)z->stream.next_in, z->stream.avail_in); */
- raise_zlib_error(err, z->stream.msg);
- }
- return Qfalse;
- }
- static void
- zstream_mark(void *p)
- {
- struct zstream *z = p;
- rb_gc_mark(z->buf);
- rb_gc_mark(z->input);
- rb_gc_mark(z->mutex);
- }
- static void
- zstream_finalize(struct zstream *z)
- {
- int err = z->func->end(&z->stream);
- if (err == Z_STREAM_ERROR)
- finalizer_warn("the stream state was inconsistent.");
- if (err == Z_DATA_ERROR)
- finalizer_warn("the stream was freed prematurely.");
- }
- static void
- zstream_free(void *p)
- {
- struct zstream *z = p;
- if (ZSTREAM_IS_READY(z)) {
- zstream_finalize(z);
- }
- xfree(z);
- }
- static size_t
- zstream_memsize(const void *p)
- {
- /* n.b. this does not track memory managed via zalloc/zfree callbacks */
- return sizeof(struct zstream);
- }
- static const rb_data_type_t zstream_data_type = {
- "zstream",
- { zstream_mark, zstream_free, zstream_memsize, },
- 0, 0, RUBY_TYPED_FREE_IMMEDIATELY
- };
- static VALUE
- zstream_new(VALUE klass, const struct zstream_funcs *funcs)
- {
- VALUE obj;
- struct zstream *z;
- obj = TypedData_Make_Struct(klass, struct zstream, &zstream_data_type, z);
- zstream_init(z, funcs);
- z->stream.opaque = (voidpf)obj;
- return obj;
- }
- #define zstream_deflate_new(klass) zstream_new((klass), &deflate_funcs)
- #define zstream_inflate_new(klass) zstream_new((klass), &inflate_funcs)
- static struct zstream *
- get_zstream(VALUE obj)
- {
- struct zstream *z;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- if (!ZSTREAM_IS_READY(z)) {
- rb_raise(cZError, "stream is not ready");
- }
- return z;
- }
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::ZStream
- *
- * Zlib::ZStream is the abstract class for the stream which handles the
- * compressed data. The operations are defined in the subclasses:
- * Zlib::Deflate for compression, and Zlib::Inflate for decompression.
- *
- * An instance of Zlib::ZStream has one stream (struct zstream in the source)
- * and two variable-length buffers which associated to the input (next_in) of
- * the stream and the output (next_out) of the stream. In this document,
- * "input buffer" means the buffer for input, and "output buffer" means the
- * buffer for output.
- *
- * Data input into an instance of Zlib::ZStream are temporally stored into
- * the end of input buffer, and then data in input buffer are processed from
- * the beginning of the buffer until no more output from the stream is
- * produced (i.e. until avail_out > 0 after processing). During processing,
- * output buffer is allocated and expanded automatically to hold all output
- * data.
- *
- * Some particular instance methods consume the data in output buffer and
- * return them as a String.
- *
- * Here is an ascii art for describing above:
- *
- * +================ an instance of Zlib::ZStream ================+
- * || ||
- * || +--------+ +-------+ +--------+ ||
- * || +--| output |<---------|zstream|<---------| input |<--+ ||
- * || | | buffer | next_out+-------+next_in | buffer | | ||
- * || | +--------+ +--------+ | ||
- * || | | ||
- * +===|======================================================|===+
- * | |
- * v |
- * "output data" "input data"
- *
- * If an error occurs during processing input buffer, an exception which is a
- * subclass of Zlib::Error is raised. At that time, both input and output
- * buffer keep their conditions at the time when the error occurs.
- *
- * == Method Catalogue
- *
- * Many of the methods in this class are fairly low-level and unlikely to be
- * of interest to users. In fact, users are unlikely to use this class
- * directly; rather they will be interested in Zlib::Inflate and
- * Zlib::Deflate.
- *
- * The higher level methods are listed below.
- *
- * - #total_in
- * - #total_out
- * - #data_type
- * - #adler
- * - #reset
- * - #finish
- * - #finished?
- * - #close
- * - #closed?
- */
- /*
- * Closes the stream. All operations on the closed stream will raise an
- * exception.
- */
- static VALUE
- rb_zstream_end(VALUE obj)
- {
- zstream_end(get_zstream(obj));
- return Qnil;
- }
- /*
- * Resets and initializes the stream. All data in both input and output buffer
- * are discarded.
- */
- static VALUE
- rb_zstream_reset(VALUE obj)
- {
- zstream_reset(get_zstream(obj));
- return Qnil;
- }
- /*
- * call-seq:
- * finish -> String
- * finish { |chunk| ... } -> nil
- *
- * Finishes the stream and flushes output buffer. If a block is given each
- * chunk is yielded to the block until the input buffer has been flushed to
- * the output buffer.
- */
- static VALUE
- rb_zstream_finish(VALUE obj)
- {
- struct zstream *z = get_zstream(obj);
- zstream_run(z, (Bytef*)"", 0, Z_FINISH);
- return zstream_detach_buffer(z);
- }
- /*
- * call-seq:
- * flush_next_in -> input
- *
- */
- static VALUE
- rb_zstream_flush_next_in(VALUE obj)
- {
- struct zstream *z;
- VALUE dst;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- dst = zstream_detach_input(z);
- return dst;
- }
- /*
- * call-seq:
- * flush_next_out -> String
- * flush_next_out { |chunk| ... } -> nil
- *
- * Flushes output buffer and returns all data in that buffer. If a block is
- * given each chunk is yielded to the block until the current output buffer
- * has been flushed.
- */
- static VALUE
- rb_zstream_flush_next_out(VALUE obj)
- {
- struct zstream *z;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- return zstream_detach_buffer(z);
- }
- /*
- * Returns number of bytes of free spaces in output buffer. Because the free
- * space is allocated automatically, this method returns 0 normally.
- */
- static VALUE
- rb_zstream_avail_out(VALUE obj)
- {
- struct zstream *z;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- return rb_uint2inum(z->stream.avail_out);
- }
- /*
- * Allocates +size+ bytes of free space in the output buffer. If there are more
- * than +size+ bytes already in the buffer, the buffer is truncated. Because
- * free space is allocated automatically, you usually don't need to use this
- * method.
- */
- static VALUE
- rb_zstream_set_avail_out(VALUE obj, VALUE size)
- {
- struct zstream *z = get_zstream(obj);
- zstream_expand_buffer_into(z, FIX2INT(size));
- return size;
- }
- /*
- * Returns bytes of data in the input buffer. Normally, returns 0.
- */
- static VALUE
- rb_zstream_avail_in(VALUE obj)
- {
- struct zstream *z;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- return INT2FIX(NIL_P(z->input) ? 0 : (int)(RSTRING_LEN(z->input)));
- }
- /*
- * Returns the total bytes of the input data to the stream. FIXME
- */
- static VALUE
- rb_zstream_total_in(VALUE obj)
- {
- return rb_uint2inum(get_zstream(obj)->stream.total_in);
- }
- /*
- * Returns the total bytes of the output data from the stream. FIXME
- */
- static VALUE
- rb_zstream_total_out(VALUE obj)
- {
- return rb_uint2inum(get_zstream(obj)->stream.total_out);
- }
- /*
- * Guesses the type of the data which have been inputed into the stream. The
- * returned value is either <tt>BINARY</tt>, <tt>ASCII</tt>, or
- * <tt>UNKNOWN</tt>.
- */
- static VALUE
- rb_zstream_data_type(VALUE obj)
- {
- return INT2FIX(get_zstream(obj)->stream.data_type);
- }
- /*
- * Returns the adler-32 checksum.
- */
- static VALUE
- rb_zstream_adler(VALUE obj)
- {
- return rb_uint2inum(get_zstream(obj)->stream.adler);
- }
- /*
- * Returns true if the stream is finished.
- */
- static VALUE
- rb_zstream_finished_p(VALUE obj)
- {
- return ZSTREAM_IS_FINISHED(get_zstream(obj)) ? Qtrue : Qfalse;
- }
- /*
- * Returns true if the stream is closed.
- */
- static VALUE
- rb_zstream_closed_p(VALUE obj)
- {
- struct zstream *z;
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- return ZSTREAM_IS_READY(z) ? Qfalse : Qtrue;
- }
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::Deflate
- *
- * Zlib::Deflate is the class for compressing data. See Zlib::ZStream for more
- * information.
- */
- #define FIXNUMARG(val, ifnil) \
- (NIL_P((val)) ? (ifnil) \
- : (FIX2INT((val))))
- #define ARG_LEVEL(val) FIXNUMARG((val), Z_DEFAULT_COMPRESSION)
- #define ARG_WBITS(val) FIXNUMARG((val), MAX_WBITS)
- #define ARG_MEMLEVEL(val) FIXNUMARG((val), DEF_MEM_LEVEL)
- #define ARG_STRATEGY(val) FIXNUMARG((val), Z_DEFAULT_STRATEGY)
- #define ARG_FLUSH(val) FIXNUMARG((val), Z_NO_FLUSH)
- static VALUE
- rb_deflate_s_allocate(VALUE klass)
- {
- return zstream_deflate_new(klass);
- }
- /*
- * Document-method: Zlib::Deflate.new
- *
- * call-seq:
- * Zlib::Deflate.new(level=DEFAULT_COMPRESSION, window_bits=MAX_WBITS, mem_level=DEF_MEM_LEVEL, strategy=DEFAULT_STRATEGY)
- *
- * Creates a new deflate stream for compression. If a given argument is nil,
- * the default value of that argument is used.
- *
- * The +level+ sets the compression level for the deflate stream between 0 (no
- * compression) and 9 (best compression). The following constants have been
- * defined to make code more readable:
- *
- * * Zlib::DEFAULT_COMPRESSION
- * * Zlib::NO_COMPRESSION
- * * Zlib::BEST_SPEED
- * * Zlib::BEST_COMPRESSION
- *
- * See http://www.zlib.net/manual.html#Constants for further information.
- *
- * The +window_bits+ sets the size of the history buffer and should be between
- * 8 and 15. Larger values of this parameter result in better compression at
- * the expense of memory usage.
- *
- * The +mem_level+ specifies how much memory should be allocated for the
- * internal compression state. 1 uses minimum memory but is slow and reduces
- * compression ratio while 9 uses maximum memory for optimal speed. The
- * default value is 8. Two constants are defined:
- *
- * * Zlib::DEF_MEM_LEVEL
- * * Zlib::MAX_MEM_LEVEL
- *
- * The +strategy+ sets the deflate compression strategy. The following
- * strategies are available:
- *
- * Zlib::DEFAULT_STRATEGY:: For normal data
- * Zlib::FILTERED:: For data produced by a filter or predictor
- * Zlib::FIXED:: Prevents dynamic Huffman codes
- * Zlib::HUFFMAN_ONLY:: Prevents string matching
- * Zlib::RLE:: Designed for better compression of PNG image data
- *
- * See the constants for further description.
- *
- * == Examples
- *
- * === Basic
- *
- * open "compressed.file", "w+" do |io|
- * io << Zlib::Deflate.new.deflate(File.read("big.file"))
- * end
- *
- * === Custom compression
- *
- * open "compressed.file", "w+" do |compressed_io|
- * deflate = Zlib::Deflate.new(Zlib::BEST_COMPRESSION,
- * Zlib::MAX_WBITS,
- * Zlib::MAX_MEM_LEVEL,
- * Zlib::HUFFMAN_ONLY)
- *
- * begin
- * open "big.file" do |big_io|
- * until big_io.eof? do
- * compressed_io << zd.deflate(big_io.read(16384))
- * end
- * end
- * ensure
- * deflate.close
- * end
- * end
- *
- * While this example will work, for best optimization review the flags for
- * your specific time, memory usage and output space requirements.
- */
- static VALUE
- rb_deflate_initialize(int argc, VALUE *argv, VALUE obj)
- {
- struct zstream *z;
- VALUE level, wbits, memlevel, strategy;
- int err;
- rb_scan_args(argc, argv, "04", &level, &wbits, &memlevel, &strategy);
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- err = deflateInit2(&z->stream, ARG_LEVEL(level), Z_DEFLATED,
- ARG_WBITS(wbits), ARG_MEMLEVEL(memlevel),
- ARG_STRATEGY(strategy));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- ZSTREAM_READY(z);
- return obj;
- }
- /*
- * Document-method: Zlib::Deflate#initialize_copy
- *
- * Duplicates the deflate stream.
- */
- static VALUE
- rb_deflate_init_copy(VALUE self, VALUE orig)
- {
- struct zstream *z1, *z2;
- int err;
- TypedData_Get_Struct(self, struct zstream, &zstream_data_type, z1);
- z2 = get_zstream(orig);
- if (z1 == z2) return self;
- err = deflateCopy(&z1->stream, &z2->stream);
- if (err != Z_OK) {
- raise_zlib_error(err, 0);
- }
- z1->input = NIL_P(z2->input) ? Qnil : rb_str_dup(z2->input);
- z1->buf = NIL_P(z2->buf) ? Qnil : rb_str_dup(z2->buf);
- z1->flags = z2->flags;
- return self;
- }
- static VALUE
- deflate_run(VALUE args)
- {
- struct zstream *z = (struct zstream*)((VALUE*)args)[0];
- VALUE src = ((VALUE*)args)[1];
- zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_FINISH);
- return zstream_detach_buffer(z);
- }
- /*
- * Document-method: Zlib::Deflate.deflate
- *
- * call-seq:
- * Zlib.deflate(string[, level])
- * Zlib::Deflate.deflate(string[, level])
- *
- * Compresses the given +string+. Valid values of level are
- * Zlib::NO_COMPRESSION, Zlib::BEST_SPEED, Zlib::BEST_COMPRESSION,
- * Zlib::DEFAULT_COMPRESSION, or an integer from 0 to 9.
- *
- * This method is almost equivalent to the following code:
- *
- * def deflate(string, level)
- * z = Zlib::Deflate.new(level)
- * dst = z.deflate(string, Zlib::FINISH)
- * z.close
- * dst
- * end
- *
- * See also Zlib.inflate
- *
- */
- static VALUE
- rb_deflate_s_deflate(int argc, VALUE *argv, VALUE klass)
- {
- struct zstream z;
- VALUE src, level, dst, args[2];
- int err, lev;
- rb_scan_args(argc, argv, "11", &src, &level);
- lev = ARG_LEVEL(level);
- StringValue(src);
- zstream_init_deflate(&z);
- err = deflateInit(&z.stream, lev);
- if (err != Z_OK) {
- raise_zlib_error(err, z.stream.msg);
- }
- ZSTREAM_READY(&z);
- args[0] = (VALUE)&z;
- args[1] = src;
- dst = rb_ensure(deflate_run, (VALUE)args, zstream_ensure_end, (VALUE)&z);
- return dst;
- }
- static void
- do_deflate(struct zstream *z, VALUE src, int flush)
- {
- if (NIL_P(src)) {
- zstream_run(z, (Bytef*)"", 0, Z_FINISH);
- return;
- }
- StringValue(src);
- if (flush != Z_NO_FLUSH || RSTRING_LEN(src) > 0) { /* prevent BUF_ERROR */
- zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), flush);
- }
- }
- /*
- * Document-method: Zlib::Deflate#deflate
- *
- * call-seq:
- * z.deflate(string, flush = Zlib::NO_FLUSH) -> String
- * z.deflate(string, flush = Zlib::NO_FLUSH) { |chunk| ... } -> nil
- *
- * Inputs +string+ into the deflate stream and returns the output from the
- * stream. On calling this method, both the input and the output buffers of
- * the stream are flushed. If +string+ is nil, this method finishes the
- * stream, just like Zlib::ZStream#finish.
- *
- * If a block is given consecutive deflated chunks from the +string+ are
- * yielded to the block and +nil+ is returned.
- *
- * The +flush+ parameter specifies the flush mode. The following constants
- * may be used:
- *
- * Zlib::NO_FLUSH:: The default
- * Zlib::SYNC_FLUSH:: Flushes the output to a byte boundary
- * Zlib::FULL_FLUSH:: SYNC_FLUSH + resets the compression state
- * Zlib::FINISH:: Pending input is processed, pending output is flushed.
- *
- * See the constants for further description.
- *
- */
- static VALUE
- rb_deflate_deflate(int argc, VALUE *argv, VALUE obj)
- {
- struct zstream *z = get_zstream(obj);
- VALUE src, flush;
- rb_scan_args(argc, argv, "11", &src, &flush);
- do_deflate(z, src, ARG_FLUSH(flush));
- return zstream_detach_buffer(z);
- }
- /*
- * Document-method: Zlib::Deflate#<<
- *
- * call-seq: << string
- *
- * Inputs +string+ into the deflate stream just like Zlib::Deflate#deflate, but
- * returns the Zlib::Deflate object itself. The output from the stream is
- * preserved in output buffer.
- */
- static VALUE
- rb_deflate_addstr(VALUE obj, VALUE src)
- {
- do_deflate(get_zstream(obj), src, Z_NO_FLUSH);
- return obj;
- }
- /*
- * Document-method: Zlib::Deflate#flush
- *
- * call-seq:
- * flush(flush = Zlib::SYNC_FLUSH) -> String
- * flush(flush = Zlib::SYNC_FLUSH) { |chunk| ... } -> nil
- *
- * This method is equivalent to <tt>deflate('', flush)</tt>. This method is
- * just provided to improve the readability of your Ruby program. If a block
- * is given chunks of deflate output are yielded to the block until the buffer
- * is flushed.
- *
- * See Zlib::Deflate#deflate for detail on the +flush+ constants NO_FLUSH,
- * SYNC_FLUSH, FULL_FLUSH and FINISH.
- */
- static VALUE
- rb_deflate_flush(int argc, VALUE *argv, VALUE obj)
- {
- struct zstream *z = get_zstream(obj);
- VALUE v_flush;
- int flush;
- rb_scan_args(argc, argv, "01", &v_flush);
- flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
- if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
- zstream_run(z, (Bytef*)"", 0, flush);
- }
- return zstream_detach_buffer(z);
- }
- /*
- * Document-method: Zlib::Deflate.params
- *
- * call-seq: params(level, strategy)
- *
- * Changes the parameters of the deflate stream to allow changes between
- * different types of data that require different types of compression. Any
- * unprocessed data is flushed before changing the params.
- *
- * See Zlib::Deflate.new for a description of +level+ and +strategy+.
- *
- */
- static VALUE
- rb_deflate_params(VALUE obj, VALUE v_level, VALUE v_strategy)
- {
- struct zstream *z = get_zstream(obj);
- int level, strategy;
- int err;
- uInt n;
- long filled;
- level = ARG_LEVEL(v_level);
- strategy = ARG_STRATEGY(v_strategy);
- n = z->stream.avail_out;
- err = deflateParams(&z->stream, level, strategy);
- filled = n - z->stream.avail_out;
- while (err == Z_BUF_ERROR) {
- rb_warning("deflateParams() returned Z_BUF_ERROR");
- zstream_expand_buffer(z);
- rb_str_set_len(z->buf, RSTRING_LEN(z->buf) + filled);
- n = z->stream.avail_out;
- err = deflateParams(&z->stream, level, strategy);
- filled = n - z->stream.avail_out;
- }
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- rb_str_set_len(z->buf, RSTRING_LEN(z->buf) + filled);
- return Qnil;
- }
- /*
- * Document-method: Zlib::Deflate.set_dictionary
- *
- * call-seq: set_dictionary(string)
- *
- * Sets the preset dictionary and returns +string+. This method is available
- * just only after Zlib::Deflate.new or Zlib::ZStream#reset method was called.
- * See zlib.h for details.
- *
- * Can raise errors of Z_STREAM_ERROR if a parameter is invalid (such as
- * NULL dictionary) or the stream state is inconsistent, Z_DATA_ERROR if
- * the given dictionary doesn't match the expected one (incorrect adler32 value)
- *
- */
- static VALUE
- rb_deflate_set_dictionary(VALUE obj, VALUE dic)
- {
- struct zstream *z = get_zstream(obj);
- VALUE src = dic;
- int err;
- StringValue(src);
- err = deflateSetDictionary(&z->stream,
- (Bytef*)RSTRING_PTR(src), RSTRING_LENINT(src));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- return dic;
- }
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::Inflate
- *
- * Zlib:Inflate is the class for decompressing compressed data. Unlike
- * Zlib::Deflate, an instance of this class is not able to duplicate (clone,
- * dup) itself.
- */
- static VALUE
- rb_inflate_s_allocate(VALUE klass)
- {
- VALUE inflate = zstream_inflate_new(klass);
- rb_ivar_set(inflate, id_dictionaries, rb_hash_new());
- return inflate;
- }
- /*
- * Document-method: Zlib::Inflate.new
- *
- * call-seq:
- * Zlib::Inflate.new(window_bits = Zlib::MAX_WBITS)
- *
- * Creates a new inflate stream for decompression. +window_bits+ sets the
- * size of the history buffer and can have the following values:
- *
- * 0::
- * Have inflate use the window size from the zlib header of the compressed
- * stream.
- *
- * (8..15)::
- * Overrides the window size of the inflate header in the compressed stream.
- * The window size must be greater than or equal to the window size of the
- * compressed stream.
- *
- * Greater than 15::
- * Add 32 to window_bits to enable zlib and gzip decoding with automatic
- * header detection, or add 16 to decode only the gzip format (a
- * Zlib::DataError will be raised for a non-gzip stream).
- *
- * (-8..-15)::
- * Enables raw deflate mode which will not generate a check value, and will
- * not look for any check values for comparison at the end of the stream.
- *
- * This is for use with other formats that use the deflate compressed data
- * format such as zip which provide their own check values.
- *
- * == Example
- *
- * open "compressed.file" do |compressed_io|
- * zi = Zlib::Inflate.new(Zlib::MAX_WBITS + 32)
- *
- * begin
- * open "uncompressed.file", "w+" do |uncompressed_io|
- * uncompressed_io << zi.inflate(compressed_io.read)
- * end
- * ensure
- * zi.close
- * end
- * end
- *
- */
- static VALUE
- rb_inflate_initialize(int argc, VALUE *argv, VALUE obj)
- {
- struct zstream *z;
- VALUE wbits;
- int err;
- rb_scan_args(argc, argv, "01", &wbits);
- TypedData_Get_Struct(obj, struct zstream, &zstream_data_type, z);
- err = inflateInit2(&z->stream, ARG_WBITS(wbits));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- ZSTREAM_READY(z);
- return obj;
- }
- static VALUE
- inflate_run(VALUE args)
- {
- struct zstream *z = (struct zstream*)((VALUE*)args)[0];
- VALUE src = ((VALUE*)args)[1];
- zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_SYNC_FLUSH);
- zstream_run(z, (Bytef*)"", 0, Z_FINISH); /* for checking errors */
- return zstream_detach_buffer(z);
- }
- /*
- * Document-method: Zlib::inflate
- *
- * call-seq:
- * Zlib.inflate(string)
- * Zlib::Inflate.inflate(string)
- *
- * Decompresses +string+. Raises a Zlib::NeedDict exception if a preset
- * dictionary is needed for decompression.
- *
- * This method is almost equivalent to the following code:
- *
- * def inflate(string)
- * zstream = Zlib::Inflate.new
- * buf = zstream.inflate(string)
- * zstream.finish
- * zstream.close
- * buf
- * end
- *
- * See also Zlib.deflate
- *
- */
- static VALUE
- rb_inflate_s_inflate(VALUE obj, VALUE src)
- {
- struct zstream z;
- VALUE dst, args[2];
- int err;
- StringValue(src);
- zstream_init_inflate(&z);
- err = inflateInit(&z.stream);
- if (err != Z_OK) {
- raise_zlib_error(err, z.stream.msg);
- }
- ZSTREAM_READY(&z);
- args[0] = (VALUE)&z;
- args[1] = src;
- dst = rb_ensure(inflate_run, (VALUE)args, zstream_ensure_end, (VALUE)&z);
- return dst;
- }
- static void
- do_inflate(struct zstream *z, VALUE src)
- {
- if (NIL_P(src)) {
- zstream_run(z, (Bytef*)"", 0, Z_FINISH);
- return;
- }
- StringValue(src);
- if (RSTRING_LEN(src) > 0 || z->stream.avail_in > 0) { /* prevent Z_BUF_ERROR */
- zstream_run(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src), Z_SYNC_FLUSH);
- }
- }
- /* Document-method: Zlib::Inflate#add_dictionary
- *
- * call-seq: add_dictionary(string)
- *
- * Provide the inflate stream with a dictionary that may be required in the
- * future. Multiple dictionaries may be provided. The inflate stream will
- * automatically choose the correct user-provided dictionary based on the
- * stream's required dictionary.
- */
- static VALUE
- rb_inflate_add_dictionary(VALUE obj, VALUE dictionary)
- {
- VALUE dictionaries = rb_ivar_get(obj, id_dictionaries);
- VALUE checksum = do_checksum(1, &dictionary, adler32);
- rb_hash_aset(dictionaries, checksum, dictionary);
- return obj;
- }
- /*
- * Document-method: Zlib::Inflate#inflate
- *
- * call-seq:
- * inflate(deflate_string, buffer: nil) -> String
- * inflate(deflate_string, buffer: nil) { |chunk| ... } -> nil
- *
- * Inputs +deflate_string+ into the inflate stream and returns the output from
- * the stream. Calling this method, both the input and the output buffer of
- * the stream are flushed. If string is +nil+, this method finishes the
- * stream, just like Zlib::ZStream#finish.
- *
- * If a block is given consecutive inflated chunks from the +deflate_string+
- * are yielded to the block and +nil+ is returned.
- *
- * If a :buffer keyword argument is given and not nil:
- *
- * * The :buffer keyword should be a String, and will used as the output buffer.
- * Using this option can reuse the memory required during inflation.
- * * When not passing a block, the return value will be the same object as the
- * :buffer keyword argument.
- * * When passing a block, the yielded chunks will be the same value as the
- * :buffer keyword argument.
- *
- * Raises a Zlib::NeedDict exception if a preset dictionary is needed to
- * decompress. Set the dictionary by Zlib::Inflate#set_dictionary and then
- * call this method again with an empty string to flush the stream:
- *
- * inflater = Zlib::Inflate.new
- *
- * begin
- * out = inflater.inflate compressed
- * rescue Zlib::NeedDict
- * # ensure the dictionary matches the stream's required dictionary
- * raise unless inflater.adler == Zlib.adler32(dictionary)
- *
- * inflater.set_dictionary dictionary
- * inflater.inflate ''
- * end
- *
- * # ...
- *
- * inflater.close
- *
- * See also Zlib::Inflate.new
- */
- static VALUE
- rb_inflate_inflate(int argc, VALUE* argv, VALUE obj)
- {
- struct zstream *z = get_zstream(obj);
- VALUE dst, src, opts, buffer = Qnil;
- if (OPTHASH_GIVEN_P(opts)) {
- VALUE buf;
- rb_get_kwargs(opts, &id_buffer, 0, 1, &buf);
- if (buf != Qundef && buf != Qnil) {
- buffer = StringValue(buf);
- }
- }
- if (buffer != Qnil) {
- if (!(ZSTREAM_REUSE_BUFFER_P(z) && z->buf == buffer)) {
- long len = RSTRING_LEN(buffer);
- if (len >= ZSTREAM_AVAIL_OUT_STEP_MAX) {
- rb_str_modify(buffer);
- }
- else {
- len = ZSTREAM_AVAIL_OUT_STEP_MAX - len;
- rb_str_modify_expand(buffer, len);
- }
- rb_str_set_len(buffer, 0);
- z->flags |= ZSTREAM_REUSE_BUFFER;
- z->buf = buffer;
- }
- } else if (ZSTREAM_REUSE_BUFFER_P(z)) {
- z->flags &= ~ZSTREAM_REUSE_BUFFER;
- z->buf = Qnil;
- }
- rb_scan_args(argc, argv, "10", &src);
- if (ZSTREAM_IS_FINISHED(z)) {
- if (NIL_P(src)) {
- dst = zstream_detach_buffer(z);
- }
- else {
- StringValue(src);
- zstream_append_buffer2(z, src);
- if (ZSTREAM_REUSE_BUFFER_P(z)) {
- dst = rb_str_resize(buffer, 0);
- } else {
- dst = rb_str_new(0, 0);
- }
- }
- }
- else {
- do_inflate(z, src);
- dst = zstream_detach_buffer(z);
- if (ZSTREAM_IS_FINISHED(z)) {
- zstream_passthrough_input(z);
- }
- }
- return dst;
- }
- /*
- * call-seq: << string
- *
- * Inputs +string+ into the inflate stream just like Zlib::Inflate#inflate, but
- * returns the Zlib::Inflate object itself. The output from the stream is
- * preserved in output buffer.
- */
- static VALUE
- rb_inflate_addstr(VALUE obj, VALUE src)
- {
- struct zstream *z = get_zstream(obj);
- if (ZSTREAM_IS_FINISHED(z)) {
- if (!NIL_P(src)) {
- StringValue(src);
- zstream_append_buffer2(z, src);
- }
- }
- else {
- do_inflate(z, src);
- if (ZSTREAM_IS_FINISHED(z)) {
- zstream_passthrough_input(z);
- }
- }
- return obj;
- }
- /*
- * call-seq: sync(string)
- *
- * Inputs +string+ into the end of input buffer and skips data until a full
- * flush point can be found. If the point is found in the buffer, this method
- * flushes the buffer and returns false. Otherwise it returns +true+ and the
- * following data of full flush point is preserved in the buffer.
- */
- static VALUE
- rb_inflate_sync(VALUE obj, VALUE src)
- {
- struct zstream *z = get_zstream(obj);
- StringValue(src);
- return zstream_sync(z, (Bytef*)RSTRING_PTR(src), RSTRING_LEN(src));
- }
- /*
- * Quoted verbatim from original documentation:
- *
- * What is this?
- *
- * <tt>:)</tt>
- */
- static VALUE
- rb_inflate_sync_point_p(VALUE obj)
- {
- struct zstream *z = get_zstream(obj);
- int err;
- err = inflateSyncPoint(&z->stream);
- if (err == 1) {
- return Qtrue;
- }
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- return Qfalse;
- }
- /*
- * Document-method: Zlib::Inflate#set_dictionary
- *
- * Sets the preset dictionary and returns +string+. This method is available just
- * only after a Zlib::NeedDict exception was raised. See zlib.h for details.
- *
- */
- static VALUE
- rb_inflate_set_dictionary(VALUE obj, VALUE dic)
- {
- struct zstream *z = get_zstream(obj);
- VALUE src = dic;
- int err;
- StringValue(src);
- err = inflateSetDictionary(&z->stream,
- (Bytef*)RSTRING_PTR(src), RSTRING_LENINT(src));
- if (err != Z_OK) {
- raise_zlib_error(err, z->stream.msg);
- }
- return dic;
- }
- #if GZIP_SUPPORT
- /* NOTE: Features for gzip files of Ruby/zlib are written from scratch
- * and using undocumented feature of zlib, negative wbits.
- * I don't think gzFile APIs of zlib are good for Ruby.
- */
- /*------- .gz file header --------*/
- #define GZ_MAGIC1 0x1f
- #define GZ_MAGIC2 0x8b
- #define GZ_METHOD_DEFLATE 8
- #define GZ_FLAG_MULTIPART 0x2
- #define GZ_FLAG_EXTRA 0x4
- #define GZ_FLAG_ORIG_NAME 0x8
- #define GZ_FLAG_COMMENT 0x10
- #define GZ_FLAG_ENCRYPT 0x20
- #define GZ_FLAG_UNKNOWN_MASK 0xc0
- #define GZ_EXTRAFLAG_FAST 0x4
- #define GZ_EXTRAFLAG_SLOW 0x2
- /* from zutil.h */
- #define OS_MSDOS 0x00
- #define OS_AMIGA 0x01
- #define OS_VMS 0x02
- #define OS_UNIX 0x03
- #define OS_ATARI 0x05
- #define OS_OS2 0x06
- #define OS_MACOS 0x07
- #define OS_TOPS20 0x0a
- #define OS_WIN32 0x0b
- #define OS_VMCMS 0x04
- #define OS_ZSYSTEM 0x08
- #define OS_CPM 0x09
- #define OS_QDOS 0x0c
- #define OS_RISCOS 0x0d
- #define OS_UNKNOWN 0xff
- #ifndef OS_CODE
- #define OS_CODE OS_UNIX
- #endif
- static ID id_write, id_readpartial, id_flush, id_seek, id_close, id_path, id_input;
- static VALUE cGzError, cNoFooter, cCRCError, cLengthError;
- /*-------- gzfile internal APIs --------*/
- struct gzfile {
- struct zstream z;
- VALUE io;
- int level;
- int os_code; /* for header */
- time_t mtime; /* for header */
- VALUE orig_name; /* for header; must be a String */
- VALUE comment; /* for header; must be a String */
- unsigned long crc;
- int ecflags;
- int lineno;
- long ungetc;
- void (*end)(struct gzfile *);
- rb_encoding *enc;
- rb_encoding *enc2;
- rb_econv_t *ec;
- VALUE ecopts;
- VALUE path;
- };
- #define GZFILE_CBUF_CAPA 10
- #define GZFILE_FLAG_SYNC ZSTREAM_FLAG_UNUSED
- #define GZFILE_FLAG_HEADER_FINISHED (ZSTREAM_FLAG_UNUSED << 1)
- #define GZFILE_FLAG_FOOTER_FINISHED (ZSTREAM_FLAG_UNUSED << 2)
- #define GZFILE_FLAG_MTIME_IS_SET (ZSTREAM_FLAG_UNUSED << 3)
- #define GZFILE_IS_FINISHED(gz) \
- (ZSTREAM_IS_FINISHED(&(gz)->z) && ZSTREAM_BUF_FILLED(&(gz)->z) == 0)
- #define GZFILE_READ_SIZE 2048
- struct read_raw_arg {
- VALUE io;
- union {
- const VALUE argv[2]; /* for rb_funcallv */
- struct {
- VALUE len;
- VALUE buf;
- } in;
- } as;
- };
- static void
- gzfile_mark(void *p)
- {
- struct gzfile *gz = p;
- rb_gc_mark(gz->io);
- rb_gc_mark(gz->orig_name);
- rb_gc_mark(gz->comment);
- zstream_mark(&gz->z);
- rb_gc_mark(gz->ecopts);
- rb_gc_mark(gz->path);
- }
- static void
- gzfile_free(void *p)
- {
- struct gzfile *gz = p;
- struct zstream *z = &gz->z;
- if (ZSTREAM_IS_READY(z)) {
- if (z->func == &deflate_funcs) {
- finalizer_warn("Zlib::GzipWriter object must be closed explicitly.");
- }
- zstream_finalize(z);
- }
- xfree(gz);
- }
- static size_t
- gzfile_memsize(const void *p)
- {
- return sizeof(struct gzfile);
- }
- static const rb_data_type_t gzfile_data_type = {
- "gzfile",
- { gzfile_mark, gzfile_free, gzfile_memsize, },
- 0, 0, RUBY_TYPED_FREE_IMMEDIATELY
- };
- static void
- gzfile_init(struct gzfile *gz, const struct zstream_funcs *funcs, void (*endfunc)(struct gzfile *))
- {
- zstream_init(&gz->z, funcs);
- gz->z.flags |= ZSTREAM_FLAG_GZFILE;
- gz->io = Qnil;
- gz->level = 0;
- gz->mtime = 0;
- gz->os_code = OS_CODE;
- gz->orig_name = Qnil;
- gz->comment = Qnil;
- gz->crc = crc32(0, Z_NULL, 0);
- gz->lineno = 0;
- gz->ungetc = 0;
- gz->end = endfunc;
- gz->enc = rb_default_external_encoding();
- gz->enc2 = 0;
- gz->ec = NULL;
- gz->ecflags = 0;
- gz->ecopts = Qnil;
- gz->path = Qnil;
- }
- static VALUE
- gzfile_new(VALUE klass, const struct zstream_funcs *funcs, void (*endfunc)(struct gzfile *))
- {
- VALUE obj;
- struct gzfile *gz;
- obj = TypedData_Make_Struct(klass, struct gzfile, &gzfile_data_type, gz);
- gzfile_init(gz, funcs, endfunc);
- return obj;
- }
- #define gzfile_writer_new(gz) gzfile_new((gz),&deflate_funcs,gzfile_writer_end)
- #define gzfile_reader_new(gz) gzfile_new((gz),&inflate_funcs,gzfile_reader_end)
- static void
- gzfile_reset(struct gzfile *gz)
- {
- zstream_reset(&gz->z);
- gz->z.flags |= ZSTREAM_FLAG_GZFILE;
- gz->crc = crc32(0, Z_NULL, 0);
- gz->lineno = 0;
- gz->ungetc = 0;
- if (gz->ec) {
- rb_econv_close(gz->ec);
- gz->ec = rb_econv_open_opts(gz->enc2->name, gz->enc->name,
- gz->ecflags, gz->ecopts);
- }
- }
- static void
- gzfile_close(struct gzfile *gz, int closeflag)
- {
- VALUE io = gz->io;
- gz->end(gz);
- gz->io = Qnil;
- gz->orig_name = Qnil;
- gz->comment = Qnil;
- if (closeflag && rb_respond_to(io, id_close)) {
- rb_funcall(io, id_close, 0);
- }
- }
- static void
- gzfile_write_raw(struct gzfile *gz)
- {
- VALUE str;
- if (ZSTREAM_BUF_FILLED(&gz->z) > 0) {
- str = zstream_detach_buffer(&gz->z);
- rb_funcall(gz->io, id_write, 1, str);
- if ((gz->z.flags & GZFILE_FLAG_SYNC)
- && rb_respond_to(gz->io, id_flush))
- rb_funcall(gz->io, id_flush, 0);
- }
- }
- static VALUE
- gzfile_read_raw_partial(VALUE arg)
- {
- struct read_raw_arg *ra = (struct read_raw_arg *)arg;
- VALUE str;
- int argc = NIL_P(ra->as.argv[1]) ? 1 : 2;
- str = rb_funcallv(ra->io, id_readpartial, argc, ra->as.argv);
- Check_Type(str, T_STRING);
- return str;
- }
- static VALUE
- gzfile_read_raw_rescue(VALUE arg, VALUE _)
- {
- struct read_raw_arg *ra = (struct read_raw_arg *)arg;
- VALUE str = Qnil;
- if (rb_obj_is_kind_of(rb_errinfo(), rb_eNoMethodError)) {
- int argc = NIL_P(ra->as.argv[1]) ? 1 : 2;
- str = rb_funcallv(ra->io, id_read, argc, ra->as.argv);
- if (!NIL_P(str)) {
- Check_Type(str, T_STRING);
- }
- }
- return str; /* return nil when EOFError */
- }
- static VALUE
- gzfile_read_raw(struct gzfile *gz, VALUE outbuf)
- {
- struct read_raw_arg ra;
- ra.io = gz->io;
- ra.as.in.len = INT2FIX(GZFILE_READ_SIZE);
- ra.as.in.buf = outbuf;
- return rb_rescue2(gzfile_read_raw_partial, (VALUE)&ra,
- gzfile_read_raw_rescue, (VALUE)&ra,
- rb_eEOFError, rb_eNoMethodError, (VALUE)0);
- }
- static int
- gzfile_read_raw_ensure(struct gzfile *gz, long size, VALUE outbuf)
- {
- VALUE str;
- if (gz->io == Qundef) { /* Zlib.gunzip */
- if (NIL_P(gz->z.input) || RSTRING_LEN(gz->z.input) < size)
- rb_raise(cGzError, "unexpected end of string");
- }
- while (NIL_P(gz->z.input) || RSTRING_LEN(gz->z.input) < size) {
- str = gzfile_read_raw(gz, outbuf);
- if (NIL_P(str)) return 0;
- zstream_append_input2(&gz->z, str);
- }
- return 1;
- }
- static char *
- gzfile_read_raw_until_zero(struct gzfile *gz, long offset)
- {
- VALUE str;
- char *p;
- for (;;) {
- p = memchr(RSTRING_PTR(gz->z.input) + offset, '\0',
- RSTRING_LEN(gz->z.input) - offset);
- if (p) break;
- str = gzfile_read_raw(gz, Qnil);
- if (NIL_P(str)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- offset = RSTRING_LEN(gz->z.input);
- zstream_append_input2(&gz->z, str);
- }
- return p;
- }
- static unsigned int
- gzfile_get16(const unsigned char *src)
- {
- unsigned int n;
- n = *(src++) & 0xff;
- n |= (*(src++) & 0xff) << 8;
- return n;
- }
- static unsigned long
- gzfile_get32(const unsigned char *src)
- {
- unsigned long n;
- n = *(src++) & 0xff;
- n |= (*(src++) & 0xff) << 8;
- n |= (*(src++) & 0xff) << 16;
- n |= (*(src++) & 0xffU) << 24;
- return n;
- }
- static void
- gzfile_set32(unsigned long n, unsigned char *dst)
- {
- *(dst++) = n & 0xff;
- *(dst++) = (n >> 8) & 0xff;
- *(dst++) = (n >> 16) & 0xff;
- *dst = (n >> 24) & 0xff;
- }
- static void
- gzfile_raise(struct gzfile *gz, VALUE klass, const char *message)
- {
- VALUE exc = rb_exc_new2(klass, message);
- if (!NIL_P(gz->z.input)) {
- rb_ivar_set(exc, id_input, rb_str_resurrect(gz->z.input));
- }
- rb_exc_raise(exc);
- }
- /*
- * Document-method: Zlib::GzipFile::Error#inspect
- *
- * Constructs a String of the GzipFile Error
- */
- static VALUE
- gzfile_error_inspect(VALUE error)
- {
- VALUE str = rb_call_super(0, 0);
- VALUE input = rb_attr_get(error, id_input);
- if (!NIL_P(input)) {
- rb_str_resize(str, RSTRING_LEN(str)-1);
- rb_str_cat2(str, ", input=");
- rb_str_append(str, rb_str_inspect(input));
- rb_str_cat2(str, ">");
- }
- return str;
- }
- static void
- gzfile_make_header(struct gzfile *gz)
- {
- Bytef buf[10]; /* the size of gzip header */
- unsigned char flags = 0, extraflags = 0;
- if (!NIL_P(gz->orig_name)) {
- flags |= GZ_FLAG_ORIG_NAME;
- }
- if (!NIL_P(gz->comment)) {
- flags |= GZ_FLAG_COMMENT;
- }
- if (!(gz->z.flags & GZFILE_FLAG_MTIME_IS_SET)) {
- gz->mtime = time(0);
- }
- if (gz->level == Z_BEST_SPEED) {
- extraflags |= GZ_EXTRAFLAG_FAST;
- }
- else if (gz->level == Z_BEST_COMPRESSION) {
- extraflags |= GZ_EXTRAFLAG_SLOW;
- }
- buf[0] = GZ_MAGIC1;
- buf[1] = GZ_MAGIC2;
- buf[2] = GZ_METHOD_DEFLATE;
- buf[3] = flags;
- gzfile_set32((unsigned long)gz->mtime, &buf[4]);
- buf[8] = extraflags;
- buf[9] = gz->os_code;
- zstream_append_buffer(&gz->z, buf, (long)sizeof(buf));
- if (!NIL_P(gz->orig_name)) {
- zstream_append_buffer2(&gz->z, gz->orig_name);
- zstream_append_buffer(&gz->z, (Bytef*)"\0", 1);
- }
- if (!NIL_P(gz->comment)) {
- zstream_append_buffer2(&gz->z, gz->comment);
- zstream_append_buffer(&gz->z, (Bytef*)"\0", 1);
- }
- gz->z.flags |= GZFILE_FLAG_HEADER_FINISHED;
- }
- static void
- gzfile_make_footer(struct gzfile *gz)
- {
- Bytef buf[8]; /* 8 is the size of gzip footer */
- gzfile_set32(gz->crc, buf);
- gzfile_set32(gz->z.stream.total_in, &buf[4]);
- zstream_append_buffer(&gz->z, buf, (long)sizeof(buf));
- gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
- }
- static void
- gzfile_read_header(struct gzfile *gz, VALUE outbuf)
- {
- const unsigned char *head;
- long len;
- char flags, *p;
- /* 10 is the size of gzip header */
- if (!gzfile_read_raw_ensure(gz, 10, outbuf)) {
- gzfile_raise(gz, cGzError, "not in gzip format");
- }
- head = (unsigned char*)RSTRING_PTR(gz->z.input);
- if (head[0] != GZ_MAGIC1 || head[1] != GZ_MAGIC2) {
- gzfile_raise(gz, cGzError, "not in gzip format");
- }
- if (head[2] != GZ_METHOD_DEFLATE) {
- rb_raise(cGzError, "unsupported compression method %d", head[2]);
- }
- flags = head[3];
- if (flags & GZ_FLAG_MULTIPART) {
- rb_raise(cGzError, "multi-part gzip file is not supported");
- }
- else if (flags & GZ_FLAG_ENCRYPT) {
- rb_raise(cGzError, "encrypted gzip file is not supported");
- }
- else if (flags & GZ_FLAG_UNKNOWN_MASK) {
- rb_raise(cGzError, "unknown flags 0x%02x", flags);
- }
- if (head[8] & GZ_EXTRAFLAG_FAST) {
- gz->level = Z_BEST_SPEED;
- }
- else if (head[8] & GZ_EXTRAFLAG_SLOW) {
- gz->level = Z_BEST_COMPRESSION;
- }
- else {
- gz->level = Z_DEFAULT_COMPRESSION;
- }
- gz->mtime = gzfile_get32(&head[4]);
- gz->os_code = head[9];
- zstream_discard_input(&gz->z, 10);
- if (flags & GZ_FLAG_EXTRA) {
- if (!gzfile_read_raw_ensure(gz, 2, outbuf)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- len = gzfile_get16((Bytef*)RSTRING_PTR(gz->z.input));
- if (!gzfile_read_raw_ensure(gz, 2 + len, outbuf)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- zstream_discard_input(&gz->z, 2 + len);
- }
- if (flags & GZ_FLAG_ORIG_NAME) {
- if (!gzfile_read_raw_ensure(gz, 1, outbuf)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- p = gzfile_read_raw_until_zero(gz, 0);
- len = p - RSTRING_PTR(gz->z.input);
- gz->orig_name = rb_str_new(RSTRING_PTR(gz->z.input), len);
- zstream_discard_input(&gz->z, len + 1);
- }
- if (flags & GZ_FLAG_COMMENT) {
- if (!gzfile_read_raw_ensure(gz, 1, outbuf)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- p = gzfile_read_raw_until_zero(gz, 0);
- len = p - RSTRING_PTR(gz->z.input);
- gz->comment = rb_str_new(RSTRING_PTR(gz->z.input), len);
- zstream_discard_input(&gz->z, len + 1);
- }
- if (gz->z.input != Qnil && RSTRING_LEN(gz->z.input) > 0) {
- zstream_run(&gz->z, 0, 0, Z_SYNC_FLUSH);
- }
- }
- static void
- gzfile_check_footer(struct gzfile *gz, VALUE outbuf)
- {
- unsigned long crc, length;
- gz->z.flags |= GZFILE_FLAG_FOOTER_FINISHED;
- /* 8 is the size of gzip footer */
- if (!gzfile_read_raw_ensure(gz, 8, outbuf)) {
- gzfile_raise(gz, cNoFooter, "footer is not found");
- }
- crc = gzfile_get32((Bytef*)RSTRING_PTR(gz->z.input));
- length = gzfile_get32((Bytef*)RSTRING_PTR(gz->z.input) + 4);
- gz->z.stream.total_in += 8; /* to rewind correctly */
- zstream_discard_input(&gz->z, 8);
- if (gz->crc != crc) {
- rb_raise(cCRCError, "invalid compressed data -- crc error");
- }
- if ((uint32_t)gz->z.stream.total_out != length) {
- rb_raise(cLengthError, "invalid compressed data -- length error");
- }
- }
- static void
- gzfile_write(struct gzfile *gz, Bytef *str, long len)
- {
- if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
- gzfile_make_header(gz);
- }
- if (len > 0 || (gz->z.flags & GZFILE_FLAG_SYNC)) {
- gz->crc = checksum_long(crc32, gz->crc, str, len);
- zstream_run(&gz->z, str, len, (gz->z.flags & GZFILE_FLAG_SYNC)
- ? Z_SYNC_FLUSH : Z_NO_FLUSH);
- }
- gzfile_write_raw(gz);
- }
- static long
- gzfile_read_more(struct gzfile *gz, VALUE outbuf)
- {
- VALUE str;
- while (!ZSTREAM_IS_FINISHED(&gz->z)) {
- str = gzfile_read_raw(gz, outbuf);
- if (NIL_P(str)) {
- if (!ZSTREAM_IS_FINISHED(&gz->z)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- break;
- }
- if (RSTRING_LEN(str) > 0) { /* prevent Z_BUF_ERROR */
- zstream_run(&gz->z, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str),
- Z_SYNC_FLUSH);
- RB_GC_GUARD(str);
- }
- if (ZSTREAM_BUF_FILLED(&gz->z) > 0) break;
- }
- return ZSTREAM_BUF_FILLED(&gz->z);
- }
- static void
- gzfile_calc_crc(struct gzfile *gz, VALUE str)
- {
- if (RSTRING_LEN(str) <= gz->ungetc) {
- gz->ungetc -= RSTRING_LEN(str);
- }
- else {
- gz->crc = checksum_long(crc32, gz->crc, (Bytef*)RSTRING_PTR(str) + gz->ungetc,
- RSTRING_LEN(str) - gz->ungetc);
- gz->ungetc = 0;
- }
- }
- static VALUE
- gzfile_newstr(struct gzfile *gz, VALUE str)
- {
- if (!gz->enc2) {
- rb_enc_associate(str, gz->enc);
- return str;
- }
- if (gz->ec && rb_enc_dummy_p(gz->enc2)) {
- str = rb_econv_str_convert(gz->ec, str, ECONV_PARTIAL_INPUT);
- rb_enc_associate(str, gz->enc);
- return str;
- }
- return rb_str_conv_enc_opts(str, gz->enc2, gz->enc,
- gz->ecflags, gz->ecopts);
- }
- static long
- gzfile_fill(struct gzfile *gz, long len)
- {
- if (len < 0)
- rb_raise(rb_eArgError, "negative length %ld given", len);
- if (len == 0)
- return 0;
- while (!ZSTREAM_IS_FINISHED(&gz->z) && ZSTREAM_BUF_FILLED(&gz->z) < len) {
- gzfile_read_more(gz, Qnil);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, Qnil);
- }
- return -1;
- }
- return len < ZSTREAM_BUF_FILLED(&gz->z) ? len : ZSTREAM_BUF_FILLED(&gz->z);
- }
- static VALUE
- gzfile_read(struct gzfile *gz, long len)
- {
- VALUE dst;
- len = gzfile_fill(gz, len);
- if (len == 0) return rb_str_new(0, 0);
- if (len < 0) return Qnil;
- dst = zstream_shift_buffer(&gz->z, len);
- if (!NIL_P(dst)) gzfile_calc_crc(gz, dst);
- return dst;
- }
- static VALUE
- gzfile_readpartial(struct gzfile *gz, long len, VALUE outbuf)
- {
- VALUE dst;
- if (len < 0)
- rb_raise(rb_eArgError, "negative length %ld given", len);
- if (len == 0) {
- if (NIL_P(outbuf))
- return rb_str_new(0, 0);
- else {
- rb_str_resize(outbuf, 0);
- return outbuf;
- }
- }
- while (!ZSTREAM_IS_FINISHED(&gz->z) && ZSTREAM_BUF_FILLED(&gz->z) == 0) {
- gzfile_read_more(gz, outbuf);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, outbuf);
- }
- if (!NIL_P(outbuf))
- rb_str_resize(outbuf, 0);
- rb_raise(rb_eEOFError, "end of file reached");
- }
- dst = zstream_shift_buffer(&gz->z, len);
- gzfile_calc_crc(gz, dst);
- if (!NIL_P(outbuf)) {
- rb_str_resize(outbuf, RSTRING_LEN(dst));
- memcpy(RSTRING_PTR(outbuf), RSTRING_PTR(dst), RSTRING_LEN(dst));
- rb_str_resize(dst, 0);
- rb_gc_force_recycle(dst);
- dst = outbuf;
- }
- return dst;
- }
- static VALUE
- gzfile_read_all(struct gzfile *gz)
- {
- VALUE dst;
- while (!ZSTREAM_IS_FINISHED(&gz->z)) {
- gzfile_read_more(gz, Qnil);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, Qnil);
- }
- return rb_str_new(0, 0);
- }
- dst = zstream_detach_buffer(&gz->z);
- if (NIL_P(dst)) return dst;
- gzfile_calc_crc(gz, dst);
- return gzfile_newstr(gz, dst);
- }
- static VALUE
- gzfile_getc(struct gzfile *gz)
- {
- VALUE buf, dst = 0;
- int len;
- len = rb_enc_mbmaxlen(gz->enc);
- while (!ZSTREAM_IS_FINISHED(&gz->z) && ZSTREAM_BUF_FILLED(&gz->z) < len) {
- gzfile_read_more(gz, Qnil);
- }
- if (GZFILE_IS_FINISHED(gz)) {
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, Qnil);
- }
- return Qnil;
- }
- if (gz->ec && rb_enc_dummy_p(gz->enc2)) {
- const unsigned char *ss, *sp, *se;
- unsigned char *ds, *dp, *de;
- VALUE cbuf = rb_enc_str_new(0, GZFILE_CBUF_CAPA, gz->enc);
- ss = sp = (const unsigned char*)RSTRING_PTR(gz->z.buf);
- se = sp + ZSTREAM_BUF_FILLED(&gz->z);
- ds = dp = (unsigned char *)RSTRING_PTR(cbuf);
- de = (unsigned char *)ds + GZFILE_CBUF_CAPA;
- (void)rb_econv_convert(gz->ec, &sp, se, &dp, de, ECONV_PARTIAL_INPUT|ECONV_AFTER_OUTPUT);
- rb_econv_check_error(gz->ec);
- dst = zstream_shift_buffer(&gz->z, sp - ss);
- gzfile_calc_crc(gz, dst);
- rb_str_resize(cbuf, dp - ds);
- return cbuf;
- }
- else {
- buf = gz->z.buf;
- len = rb_enc_mbclen(RSTRING_PTR(buf), RSTRING_END(buf), gz->enc);
- dst = gzfile_read(gz, len);
- if (NIL_P(dst)) return dst;
- return gzfile_newstr(gz, dst);
- }
- }
- static void
- gzfile_ungets(struct gzfile *gz, const Bytef *b, long len)
- {
- zstream_buffer_ungets(&gz->z, b, len);
- gz->ungetc+=len;
- }
- static void
- gzfile_ungetbyte(struct gzfile *gz, int c)
- {
- zstream_buffer_ungetbyte(&gz->z, c);
- gz->ungetc++;
- }
- static VALUE
- gzfile_writer_end_run(VALUE arg)
- {
- struct gzfile *gz = (struct gzfile *)arg;
- if (!(gz->z.flags & GZFILE_FLAG_HEADER_FINISHED)) {
- gzfile_make_header(gz);
- }
- zstream_run(&gz->z, (Bytef*)"", 0, Z_FINISH);
- gzfile_make_footer(gz);
- gzfile_write_raw(gz);
- return Qnil;
- }
- static void
- gzfile_writer_end(struct gzfile *gz)
- {
- if (ZSTREAM_IS_CLOSING(&gz->z)) return;
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
- rb_ensure(gzfile_writer_end_run, (VALUE)gz, zstream_ensure_end, (VALUE)&gz->z);
- }
- static VALUE
- gzfile_reader_end_run(VALUE arg)
- {
- struct gzfile *gz = (struct gzfile *)arg;
- if (GZFILE_IS_FINISHED(gz)
- && !(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, Qnil);
- }
- return Qnil;
- }
- static void
- gzfile_reader_end(struct gzfile *gz)
- {
- if (ZSTREAM_IS_CLOSING(&gz->z)) return;
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
- rb_ensure(gzfile_reader_end_run, (VALUE)gz, zstream_ensure_end, (VALUE)&gz->z);
- }
- static void
- gzfile_reader_rewind(struct gzfile *gz)
- {
- long n;
- n = gz->z.stream.total_in;
- if (!NIL_P(gz->z.input)) {
- n += RSTRING_LEN(gz->z.input);
- }
- rb_funcall(gz->io, id_seek, 2, rb_int2inum(-n), INT2FIX(1));
- gzfile_reset(gz);
- }
- static VALUE
- gzfile_reader_get_unused(struct gzfile *gz)
- {
- VALUE str;
- if (!ZSTREAM_IS_READY(&gz->z)) return Qnil;
- if (!GZFILE_IS_FINISHED(gz)) return Qnil;
- if (!(gz->z.flags & GZFILE_FLAG_FOOTER_FINISHED)) {
- gzfile_check_footer(gz, Qnil);
- }
- if (NIL_P(gz->z.input)) return Qnil;
- str = rb_str_resurrect(gz->z.input);
- return str;
- }
- static struct gzfile *
- get_gzfile(VALUE obj)
- {
- struct gzfile *gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- if (!ZSTREAM_IS_READY(&gz->z)) {
- rb_raise(cGzError, "closed gzip stream");
- }
- return gz;
- }
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::GzipFile
- *
- * Zlib::GzipFile is an abstract class for handling a gzip formatted
- * compressed file. The operations are defined in the subclasses,
- * Zlib::GzipReader for reading, and Zlib::GzipWriter for writing.
- *
- * GzipReader should be used by associating an IO, or IO-like, object.
- *
- * == Method Catalogue
- *
- * - ::wrap
- * - ::open (Zlib::GzipReader::open and Zlib::GzipWriter::open)
- * - #close
- * - #closed?
- * - #comment
- * - comment= (Zlib::GzipWriter#comment=)
- * - #crc
- * - eof? (Zlib::GzipReader#eof?)
- * - #finish
- * - #level
- * - lineno (Zlib::GzipReader#lineno)
- * - lineno= (Zlib::GzipReader#lineno=)
- * - #mtime
- * - mtime= (Zlib::GzipWriter#mtime=)
- * - #orig_name
- * - orig_name (Zlib::GzipWriter#orig_name=)
- * - #os_code
- * - path (when the underlying IO supports #path)
- * - #sync
- * - #sync=
- * - #to_io
- *
- * (due to internal structure, documentation may appear under Zlib::GzipReader
- * or Zlib::GzipWriter)
- */
- typedef struct {
- int argc;
- VALUE *argv;
- VALUE klass;
- } new_wrap_arg_t;
- static VALUE
- new_wrap(VALUE tmp)
- {
- new_wrap_arg_t *arg = (new_wrap_arg_t *)tmp;
- return rb_class_new_instance_kw(arg->argc, arg->argv, arg->klass, RB_PASS_CALLED_KEYWORDS);
- }
- static VALUE
- gzfile_ensure_close(VALUE obj)
- {
- struct gzfile *gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- if (ZSTREAM_IS_READY(&gz->z)) {
- gzfile_close(gz, 1);
- }
- return Qnil;
- }
- static VALUE
- gzfile_wrap(int argc, VALUE *argv, VALUE klass, int close_io_on_error)
- {
- VALUE obj;
- if (close_io_on_error) {
- int state = 0;
- new_wrap_arg_t arg;
- arg.argc = argc;
- arg.argv = argv;
- arg.klass = klass;
- obj = rb_protect(new_wrap, (VALUE)&arg, &state);
- if (state) {
- rb_io_close(argv[0]);
- rb_jump_tag(state);
- }
- }
- else {
- obj = rb_class_new_instance_kw(argc, argv, klass, RB_PASS_CALLED_KEYWORDS);
- }
- if (rb_block_given_p()) {
- return rb_ensure(rb_yield, obj, gzfile_ensure_close, obj);
- }
- else {
- return obj;
- }
- }
- /*
- * Document-method: Zlib::GzipFile.wrap
- *
- * call-seq:
- * Zlib::GzipReader.wrap(io, ...) { |gz| ... }
- * Zlib::GzipWriter.wrap(io, ...) { |gz| ... }
- *
- * Creates a GzipReader or GzipWriter associated with +io+, passing in any
- * necessary extra options, and executes the block with the newly created
- * object just like File.open.
- *
- * The GzipFile object will be closed automatically after executing the block.
- * If you want to keep the associated IO object open, you may call
- * Zlib::GzipFile#finish method in the block.
- */
- static VALUE
- rb_gzfile_s_wrap(int argc, VALUE *argv, VALUE klass)
- {
- return gzfile_wrap(argc, argv, klass, 0);
- }
- /*
- * Document-method: Zlib::GzipFile.open
- *
- * See Zlib::GzipReader#open and Zlib::GzipWriter#open.
- */
- static VALUE
- gzfile_s_open(int argc, VALUE *argv, VALUE klass, const char *mode)
- {
- VALUE io, filename;
- rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
- filename = argv[0];
- io = rb_file_open_str(filename, mode);
- argv[0] = io;
- return gzfile_wrap(argc, argv, klass, 1);
- }
- /*
- * Document-method: Zlib::GzipFile#to_io
- *
- * Same as IO.
- */
- static VALUE
- rb_gzfile_to_io(VALUE obj)
- {
- return get_gzfile(obj)->io;
- }
- /*
- * Document-method: Zlib::GzipFile#crc
- *
- * Returns CRC value of the uncompressed data.
- */
- static VALUE
- rb_gzfile_crc(VALUE obj)
- {
- return rb_uint2inum(get_gzfile(obj)->crc);
- }
- /*
- * Document-method: Zlib::GzipFile#mtime
- *
- * Returns last modification time recorded in the gzip file header.
- */
- static VALUE
- rb_gzfile_mtime(VALUE obj)
- {
- return rb_time_new(get_gzfile(obj)->mtime, (time_t)0);
- }
- /*
- * Document-method: Zlib::GzipFile#level
- *
- * Returns compression level.
- */
- static VALUE
- rb_gzfile_level(VALUE obj)
- {
- return INT2FIX(get_gzfile(obj)->level);
- }
- /*
- * Document-method: Zlib::GzipFile#os_code
- *
- * Returns OS code number recorded in the gzip file header.
- */
- static VALUE
- rb_gzfile_os_code(VALUE obj)
- {
- return INT2FIX(get_gzfile(obj)->os_code);
- }
- /*
- * Document-method: Zlib::GzipFile#orig_name
- *
- * Returns original filename recorded in the gzip file header, or +nil+ if
- * original filename is not present.
- */
- static VALUE
- rb_gzfile_orig_name(VALUE obj)
- {
- VALUE str = get_gzfile(obj)->orig_name;
- if (!NIL_P(str)) {
- str = rb_str_dup(str);
- }
- return str;
- }
- /*
- * Document-method: Zlib::GzipFile#comment
- *
- * Returns comments recorded in the gzip file header, or nil if the comments
- * is not present.
- */
- static VALUE
- rb_gzfile_comment(VALUE obj)
- {
- VALUE str = get_gzfile(obj)->comment;
- if (!NIL_P(str)) {
- str = rb_str_dup(str);
- }
- return str;
- }
- /*
- * Document-method: Zlib::GzipFile#lineno
- *
- * The line number of the last row read from this file.
- */
- static VALUE
- rb_gzfile_lineno(VALUE obj)
- {
- return INT2NUM(get_gzfile(obj)->lineno);
- }
- /*
- * Document-method: Zlib::GzipReader#lineno=
- *
- * Specify line number of the last row read from this file.
- */
- static VALUE
- rb_gzfile_set_lineno(VALUE obj, VALUE lineno)
- {
- struct gzfile *gz = get_gzfile(obj);
- gz->lineno = NUM2INT(lineno);
- return lineno;
- }
- /*
- * Document-method: Zlib::GzipWriter#mtime=
- *
- * Specify the modification time (+mtime+) in the gzip header.
- * Using an Integer.
- *
- * Setting the mtime in the gzip header does not effect the
- * mtime of the file generated. Different utilities that
- * expand the gzipped files may use the mtime
- * header. For example the gunzip utility can use the `-N`
- * flag which will set the resultant file's mtime to the
- * value in the header. By default many tools will set
- * the mtime of the expanded file to the mtime of the
- * gzipped file, not the mtime in the header.
- *
- * If you do not set an mtime, the default value will be the time
- * when compression started. Setting a value of 0 indicates
- * no time stamp is available.
- */
- static VALUE
- rb_gzfile_set_mtime(VALUE obj, VALUE mtime)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE val;
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
- val = rb_Integer(mtime);
- gz->mtime = NUM2UINT(val);
- gz->z.flags |= GZFILE_FLAG_MTIME_IS_SET;
- return mtime;
- }
- /*
- * Document-method: Zlib::GzipFile#orig_name=
- *
- * Specify the original name (+str+) in the gzip header.
- */
- static VALUE
- rb_gzfile_set_orig_name(VALUE obj, VALUE str)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE s;
- char *p;
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
- s = rb_str_dup(rb_str_to_str(str));
- p = memchr(RSTRING_PTR(s), '\0', RSTRING_LEN(s));
- if (p) {
- rb_str_resize(s, p - RSTRING_PTR(s));
- }
- gz->orig_name = s;
- return str;
- }
- /*
- * Document-method: Zlib::GzipFile#comment=
- *
- * Specify the comment (+str+) in the gzip header.
- */
- static VALUE
- rb_gzfile_set_comment(VALUE obj, VALUE str)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE s;
- char *p;
- if (gz->z.flags & GZFILE_FLAG_HEADER_FINISHED) {
- rb_raise(cGzError, "header is already written");
- }
- s = rb_str_dup(rb_str_to_str(str));
- p = memchr(RSTRING_PTR(s), '\0', RSTRING_LEN(s));
- if (p) {
- rb_str_resize(s, p - RSTRING_PTR(s));
- }
- gz->comment = s;
- return str;
- }
- /*
- * Document-method: Zlib::GzipFile#close
- *
- * Closes the GzipFile object. This method calls close method of the
- * associated IO object. Returns the associated IO object.
- */
- static VALUE
- rb_gzfile_close(VALUE obj)
- {
- struct gzfile *gz;
- VALUE io;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- if (!ZSTREAM_IS_READY(&gz->z)) {
- return Qnil;
- }
- io = gz->io;
- gzfile_close(gz, 1);
- return io;
- }
- /*
- * Document-method: Zlib::GzipFile#finish
- *
- * Closes the GzipFile object. Unlike Zlib::GzipFile#close, this method never
- * calls the close method of the associated IO object. Returns the associated IO
- * object.
- */
- static VALUE
- rb_gzfile_finish(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE io;
- io = gz->io;
- gzfile_close(gz, 0);
- return io;
- }
- /*
- * Document-method: Zlib::GzipFile#closed?
- *
- * Same as IO#closed?
- *
- */
- static VALUE
- rb_gzfile_closed_p(VALUE obj)
- {
- struct gzfile *gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- return NIL_P(gz->io) ? Qtrue : Qfalse;
- }
- /*
- * Document-method: Zlib::GzipFile#eof?
- *
- * Returns +true+ or +false+ whether the stream has reached the end.
- */
- static VALUE
- rb_gzfile_eof_p(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- return GZFILE_IS_FINISHED(gz) ? Qtrue : Qfalse;
- }
- /*
- * Document-method: Zlib::GzipFile#sync
- *
- * Same as IO#sync
- *
- */
- static VALUE
- rb_gzfile_sync(VALUE obj)
- {
- return (get_gzfile(obj)->z.flags & GZFILE_FLAG_SYNC) ? Qtrue : Qfalse;
- }
- /*
- * Document-method: Zlib::GzipFile#sync=
- *
- * call-seq: sync = flag
- *
- * Same as IO. If flag is +true+, the associated IO object must respond to the
- * +flush+ method. While +sync+ mode is +true+, the compression ratio
- * decreases sharply.
- */
- static VALUE
- rb_gzfile_set_sync(VALUE obj, VALUE mode)
- {
- struct gzfile *gz = get_gzfile(obj);
- if (RTEST(mode)) {
- gz->z.flags |= GZFILE_FLAG_SYNC;
- }
- else {
- gz->z.flags &= ~GZFILE_FLAG_SYNC;
- }
- return mode;
- }
- /*
- * Document-method: Zlib::GzipFile#total_in
- *
- * Total number of input bytes read so far.
- */
- static VALUE
- rb_gzfile_total_in(VALUE obj)
- {
- return rb_uint2inum(get_gzfile(obj)->z.stream.total_in);
- }
- /*
- * Document-method: Zlib::GzipFile#total_out
- *
- * Total number of output bytes output so far.
- */
- static VALUE
- rb_gzfile_total_out(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- uLong total_out = gz->z.stream.total_out;
- long buf_filled = ZSTREAM_BUF_FILLED(&gz->z);
- if (total_out >= (uLong)buf_filled) {
- return rb_uint2inum(total_out - buf_filled);
- } else {
- return LONG2FIX(-(buf_filled - (long)total_out));
- }
- }
- /*
- * Document-method: Zlib::GzipFile#path
- *
- * call-seq: path
- *
- * Returns the path string of the associated IO-like object. This
- * method is only defined when the IO-like object responds to #path().
- */
- static VALUE
- rb_gzfile_path(VALUE obj)
- {
- struct gzfile *gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- return gz->path;
- }
- static VALUE
- gzfile_initialize_path_partial(VALUE obj)
- {
- struct gzfile* gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- gz->path = rb_funcall(gz->io, id_path, 0);
- rb_define_singleton_method(obj, "path", rb_gzfile_path, 0);
- return Qnil;
- }
- static void
- rb_gzfile_ecopts(struct gzfile *gz, VALUE opts)
- {
- if (!NIL_P(opts)) {
- rb_io_extract_encoding_option(opts, &gz->enc, &gz->enc2, NULL);
- }
- if (gz->enc2) {
- gz->ecflags = rb_econv_prepare_opts(opts, &opts);
- gz->ec = rb_econv_open_opts(gz->enc2->name, gz->enc->name,
- gz->ecflags, opts);
- gz->ecopts = opts;
- }
- }
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::GzipWriter
- *
- * Zlib::GzipWriter is a class for writing gzipped files. GzipWriter should
- * be used with an instance of IO, or IO-like, object.
- *
- * Following two example generate the same result.
- *
- * Zlib::GzipWriter.open('hoge.gz') do |gz|
- * gz.write 'jugemu jugemu gokou no surikire...'
- * end
- *
- * File.open('hoge.gz', 'w') do |f|
- * gz = Zlib::GzipWriter.new(f)
- * gz.write 'jugemu jugemu gokou no surikire...'
- * gz.close
- * end
- *
- * To make like gzip(1) does, run following:
- *
- * orig = 'hoge.txt'
- * Zlib::GzipWriter.open('hoge.gz') do |gz|
- * gz.mtime = File.mtime(orig)
- * gz.orig_name = orig
- * gz.write IO.binread(orig)
- * end
- *
- * NOTE: Due to the limitation of Ruby's finalizer, you must explicitly close
- * GzipWriter objects by Zlib::GzipWriter#close etc. Otherwise, GzipWriter
- * will be not able to write the gzip footer and will generate a broken gzip
- * file.
- */
- static VALUE
- rb_gzwriter_s_allocate(VALUE klass)
- {
- return gzfile_writer_new(klass);
- }
- /*
- * call-seq: Zlib::GzipWriter.open(filename, level=nil, strategy=nil) { |gz| ... }
- *
- * Opens a file specified by +filename+ for writing gzip compressed data, and
- * returns a GzipWriter object associated with that file. Further details of
- * this method are found in Zlib::GzipWriter.new and Zlib::GzipFile.wrap.
- */
- static VALUE
- rb_gzwriter_s_open(int argc, VALUE *argv, VALUE klass)
- {
- return gzfile_s_open(argc, argv, klass, "wb");
- }
- /*
- * call-seq:
- * Zlib::GzipWriter.new(io, level = nil, strategy = nil, options = {})
- *
- * Creates a GzipWriter object associated with +io+. +level+ and +strategy+
- * should be the same as the arguments of Zlib::Deflate.new. The GzipWriter
- * object writes gzipped data to +io+. +io+ must respond to the
- * +write+ method that behaves the same as IO#write.
- *
- * The +options+ hash may be used to set the encoding of the data.
- * +:external_encoding+, +:internal_encoding+ and +:encoding+ may be set as in
- * IO::new.
- */
- static VALUE
- rb_gzwriter_initialize(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz;
- VALUE io, level, strategy, opt = Qnil;
- int err;
- if (argc > 1) {
- opt = rb_check_convert_type(argv[argc-1], T_HASH, "Hash", "to_hash");
- if (!NIL_P(opt)) argc--;
- }
- rb_scan_args(argc, argv, "12", &io, &level, &strategy);
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- /* this is undocumented feature of zlib */
- gz->level = ARG_LEVEL(level);
- err = deflateInit2(&gz->z.stream, gz->level, Z_DEFLATED,
- -MAX_WBITS, DEF_MEM_LEVEL, ARG_STRATEGY(strategy));
- if (err != Z_OK) {
- raise_zlib_error(err, gz->z.stream.msg);
- }
- gz->io = io;
- ZSTREAM_READY(&gz->z);
- rb_gzfile_ecopts(gz, opt);
- if (rb_respond_to(io, id_path)) {
- /* File#path may raise IOError in case when a path is unavailable */
- rb_rescue2(gzfile_initialize_path_partial, obj, NULL, Qnil, rb_eIOError, (VALUE)0);
- }
- return obj;
- }
- /*
- * call-seq: flush(flush=nil)
- *
- * Flushes all the internal buffers of the GzipWriter object. The meaning of
- * +flush+ is same as in Zlib::Deflate#deflate. <tt>Zlib::SYNC_FLUSH</tt> is used if
- * +flush+ is omitted. It is no use giving flush <tt>Zlib::NO_FLUSH</tt>.
- */
- static VALUE
- rb_gzwriter_flush(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE v_flush;
- int flush;
- rb_scan_args(argc, argv, "01", &v_flush);
- flush = FIXNUMARG(v_flush, Z_SYNC_FLUSH);
- if (flush != Z_NO_FLUSH) { /* prevent Z_BUF_ERROR */
- zstream_run(&gz->z, (Bytef*)"", 0, flush);
- }
- gzfile_write_raw(gz);
- if (rb_respond_to(gz->io, id_flush)) {
- rb_funcall(gz->io, id_flush, 0);
- }
- return obj;
- }
- /*
- * Same as IO.
- */
- static VALUE
- rb_gzwriter_write(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- size_t total = 0;
- while (argc-- > 0) {
- VALUE str = *argv++;
- if (!RB_TYPE_P(str, T_STRING))
- str = rb_obj_as_string(str);
- if (gz->enc2 && gz->enc2 != rb_ascii8bit_encoding()) {
- str = rb_str_conv_enc(str, rb_enc_get(str), gz->enc2);
- }
- gzfile_write(gz, (Bytef*)RSTRING_PTR(str), RSTRING_LEN(str));
- total += RSTRING_LEN(str);
- RB_GC_GUARD(str);
- }
- return SIZET2NUM(total);
- }
- /*
- * Same as IO.
- */
- static VALUE
- rb_gzwriter_putc(VALUE obj, VALUE ch)
- {
- struct gzfile *gz = get_gzfile(obj);
- char c = NUM2CHR(ch);
- gzfile_write(gz, (Bytef*)&c, 1);
- return ch;
- }
- /*
- * Document-method: <<
- * Same as IO.
- */
- #define rb_gzwriter_addstr rb_io_addstr
- /*
- * Document-method: printf
- * Same as IO.
- */
- #define rb_gzwriter_printf rb_io_printf
- /*
- * Document-method: print
- * Same as IO.
- */
- #define rb_gzwriter_print rb_io_print
- /*
- * Document-method: puts
- * Same as IO.
- */
- #define rb_gzwriter_puts rb_io_puts
- /* ------------------------------------------------------------------------- */
- /*
- * Document-class: Zlib::GzipReader
- *
- * Zlib::GzipReader is the class for reading a gzipped file. GzipReader should
- * be used as an IO, or -IO-like, object.
- *
- * Zlib::GzipReader.open('hoge.gz') {|gz|
- * print gz.read
- * }
- *
- * File.open('hoge.gz') do |f|
- * gz = Zlib::GzipReader.new(f)
- * print gz.read
- * gz.close
- * end
- *
- * == Method Catalogue
- *
- * The following methods in Zlib::GzipReader are just like their counterparts
- * in IO, but they raise Zlib::Error or Zlib::GzipFile::Error exception if an
- * error was found in the gzip file.
- * - #each
- * - #each_line
- * - #each_byte
- * - #gets
- * - #getc
- * - #lineno
- * - #lineno=
- * - #read
- * - #readchar
- * - #readline
- * - #readlines
- * - #ungetc
- *
- * Be careful of the footer of the gzip file. A gzip file has the checksum of
- * pre-compressed data in its footer. GzipReader checks all uncompressed data
- * against that checksum at the following cases, and if it fails, raises
- * <tt>Zlib::GzipFile::NoFooter</tt>, <tt>Zlib::GzipFile::CRCError</tt>, or
- * <tt>Zlib::GzipFile::LengthError</tt> exception.
- *
- * - When an reading request is received beyond the end of file (the end of
- * compressed data). That is, when Zlib::GzipReader#read,
- * Zlib::GzipReader#gets, or some other methods for reading returns nil.
- * - When Zlib::GzipFile#close method is called after the object reaches the
- * end of file.
- * - When Zlib::GzipReader#unused method is called after the object reaches
- * the end of file.
- *
- * The rest of the methods are adequately described in their own
- * documentation.
- */
- static VALUE
- rb_gzreader_s_allocate(VALUE klass)
- {
- return gzfile_reader_new(klass);
- }
- /*
- * Document-method: Zlib::GzipReader.open
- *
- * call-seq: Zlib::GzipReader.open(filename) {|gz| ... }
- *
- * Opens a file specified by +filename+ as a gzipped file, and returns a
- * GzipReader object associated with that file. Further details of this method
- * are in Zlib::GzipReader.new and ZLib::GzipFile.wrap.
- */
- static VALUE
- rb_gzreader_s_open(int argc, VALUE *argv, VALUE klass)
- {
- return gzfile_s_open(argc, argv, klass, "rb");
- }
- /*
- * Document-method: Zlib::GzipReader.zcat
- *
- * call-seq:
- * Zlib::GzipReader.zcat(io, options = {}, &block) => nil
- * Zlib::GzipReader.zcat(io, options = {}) => string
- *
- * Decompresses all gzip data in the +io+, handling multiple gzip
- * streams until the end of the +io+. There should not be any non-gzip
- * data after the gzip streams.
- *
- * If a block is given, it is yielded strings of uncompressed data,
- * and the method returns +nil+.
- * If a block is not given, the method returns the concatenation of
- * all uncompressed data in all gzip streams.
- */
- static VALUE
- rb_gzreader_s_zcat(int argc, VALUE *argv, VALUE klass)
- {
- VALUE io, unused, obj, buf=0, tmpbuf;
- long pos;
- rb_check_arity(argc, 1, 2);
- io = argv[0];
- do {
- obj = rb_funcallv(klass, rb_intern("new"), argc, argv);
- if (rb_block_given_p()) {
- rb_gzreader_each(0, 0, obj);
- }
- else {
- if (!buf) {
- buf = rb_str_new(0, 0);
- }
- tmpbuf = gzfile_read_all(get_gzfile(obj));
- rb_str_cat(buf, RSTRING_PTR(tmpbuf), RSTRING_LEN(tmpbuf));
- }
- rb_gzreader_read(0, 0, obj);
- pos = NUM2LONG(rb_funcall(io, rb_intern("pos"), 0));
- unused = rb_gzreader_unused(obj);
- rb_gzfile_finish(obj);
- if (!NIL_P(unused)) {
- pos -= NUM2LONG(rb_funcall(unused, rb_intern("length"), 0));
- rb_funcall(io, rb_intern("pos="), 1, LONG2NUM(pos));
- }
- } while (pos < NUM2LONG(rb_funcall(io, rb_intern("size"), 0)));
- if (rb_block_given_p()) {
- return Qnil;
- }
- return buf;
- }
- /*
- * Document-method: Zlib::GzipReader.new
- *
- * call-seq:
- * Zlib::GzipReader.new(io, options = {})
- *
- * Creates a GzipReader object associated with +io+. The GzipReader object reads
- * gzipped data from +io+, and parses/decompresses it. The +io+ must
- * have a +read+ method that behaves same as the IO#read.
- *
- * The +options+ hash may be used to set the encoding of the data.
- * +:external_encoding+, +:internal_encoding+ and +:encoding+ may be set as in
- * IO::new.
- *
- * If the gzip file header is incorrect, raises an Zlib::GzipFile::Error
- * exception.
- */
- static VALUE
- rb_gzreader_initialize(int argc, VALUE *argv, VALUE obj)
- {
- VALUE io, opt = Qnil;
- struct gzfile *gz;
- int err;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- rb_scan_args(argc, argv, "1:", &io, &opt);
- /* this is undocumented feature of zlib */
- err = inflateInit2(&gz->z.stream, -MAX_WBITS);
- if (err != Z_OK) {
- raise_zlib_error(err, gz->z.stream.msg);
- }
- gz->io = io;
- ZSTREAM_READY(&gz->z);
- gzfile_read_header(gz, Qnil);
- rb_gzfile_ecopts(gz, opt);
- if (rb_respond_to(io, id_path)) {
- /* File#path may raise IOError in case when a path is unavailable */
- rb_rescue2(gzfile_initialize_path_partial, obj, NULL, Qnil, rb_eIOError, (VALUE)0);
- }
- return obj;
- }
- /*
- * Document-method: Zlib::GzipReader#rewind
- *
- * Resets the position of the file pointer to the point created the GzipReader
- * object. The associated IO object needs to respond to the +seek+ method.
- */
- static VALUE
- rb_gzreader_rewind(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- gzfile_reader_rewind(gz);
- return INT2FIX(0);
- }
- /*
- * Document-method: Zlib::GzipReader#unused
- *
- * Returns the rest of the data which had read for parsing gzip format, or
- * +nil+ if the whole gzip file is not parsed yet.
- */
- static VALUE
- rb_gzreader_unused(VALUE obj)
- {
- struct gzfile *gz;
- TypedData_Get_Struct(obj, struct gzfile, &gzfile_data_type, gz);
- return gzfile_reader_get_unused(gz);
- }
- /*
- * Document-method: Zlib::GzipReader#read
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_read(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE vlen;
- long len;
- rb_scan_args(argc, argv, "01", &vlen);
- if (NIL_P(vlen)) {
- return gzfile_read_all(gz);
- }
- len = NUM2INT(vlen);
- if (len < 0) {
- rb_raise(rb_eArgError, "negative length %ld given", len);
- }
- return gzfile_read(gz, len);
- }
- /*
- * Document-method: Zlib::GzipReader#readpartial
- *
- * call-seq:
- * gzipreader.readpartial(maxlen [, outbuf]) => string, outbuf
- *
- * Reads at most <i>maxlen</i> bytes from the gziped stream but
- * it blocks only if <em>gzipreader</em> has no data immediately available.
- * If the optional <i>outbuf</i> argument is present,
- * it must reference a String, which will receive the data.
- * It raises <code>EOFError</code> on end of file.
- */
- static VALUE
- rb_gzreader_readpartial(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE vlen, outbuf;
- long len;
- rb_scan_args(argc, argv, "11", &vlen, &outbuf);
- len = NUM2INT(vlen);
- if (len < 0) {
- rb_raise(rb_eArgError, "negative length %ld given", len);
- }
- if (!NIL_P(outbuf))
- Check_Type(outbuf, T_STRING);
- return gzfile_readpartial(gz, len, outbuf);
- }
- /*
- * Document-method: Zlib::GzipReader#getc
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_getc(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- return gzfile_getc(gz);
- }
- /*
- * Document-method: Zlib::GzipReader#readchar
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_readchar(VALUE obj)
- {
- VALUE dst;
- dst = rb_gzreader_getc(obj);
- if (NIL_P(dst)) {
- rb_raise(rb_eEOFError, "end of file reached");
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#getbyte
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_getbyte(VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE dst;
- dst = gzfile_read(gz, 1);
- if (!NIL_P(dst)) {
- dst = INT2FIX((unsigned int)(RSTRING_PTR(dst)[0]) & 0xff);
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#readbyte
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_readbyte(VALUE obj)
- {
- VALUE dst;
- dst = rb_gzreader_getbyte(obj);
- if (NIL_P(dst)) {
- rb_raise(rb_eEOFError, "end of file reached");
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#each_char
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_each_char(VALUE obj)
- {
- VALUE c;
- RETURN_ENUMERATOR(obj, 0, 0);
- while (!NIL_P(c = rb_gzreader_getc(obj))) {
- rb_yield(c);
- }
- return Qnil;
- }
- /*
- * Document-method: Zlib::GzipReader#each_byte
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_each_byte(VALUE obj)
- {
- VALUE c;
- RETURN_ENUMERATOR(obj, 0, 0);
- while (!NIL_P(c = rb_gzreader_getbyte(obj))) {
- rb_yield(c);
- }
- return Qnil;
- }
- /*
- * Document-method: Zlib::GzipReader#ungetc
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_ungetc(VALUE obj, VALUE s)
- {
- struct gzfile *gz;
- if (FIXNUM_P(s))
- return rb_gzreader_ungetbyte(obj, s);
- gz = get_gzfile(obj);
- StringValue(s);
- if (gz->enc2 && gz->enc2 != rb_ascii8bit_encoding()) {
- s = rb_str_conv_enc(s, rb_enc_get(s), gz->enc2);
- }
- gzfile_ungets(gz, (const Bytef*)RSTRING_PTR(s), RSTRING_LEN(s));
- RB_GC_GUARD(s);
- return Qnil;
- }
- /*
- * Document-method: Zlib::GzipReader#ungetbyte
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_ungetbyte(VALUE obj, VALUE ch)
- {
- struct gzfile *gz = get_gzfile(obj);
- gzfile_ungetbyte(gz, NUM2CHR(ch));
- return Qnil;
- }
- static void
- gzreader_skip_linebreaks(struct gzfile *gz)
- {
- VALUE str;
- char *p;
- int n;
- while (ZSTREAM_BUF_FILLED(&gz->z) == 0) {
- if (GZFILE_IS_FINISHED(gz)) return;
- gzfile_read_more(gz, Qnil);
- }
- n = 0;
- p = RSTRING_PTR(gz->z.buf);
- while (n++, *(p++) == '\n') {
- if (n >= ZSTREAM_BUF_FILLED(&gz->z)) {
- str = zstream_detach_buffer(&gz->z);
- gzfile_calc_crc(gz, str);
- while (ZSTREAM_BUF_FILLED(&gz->z) == 0) {
- if (GZFILE_IS_FINISHED(gz)) return;
- gzfile_read_more(gz, Qnil);
- }
- n = 0;
- p = RSTRING_PTR(gz->z.buf);
- }
- }
- str = zstream_shift_buffer(&gz->z, n - 1);
- gzfile_calc_crc(gz, str);
- }
- static void
- rscheck(const char *rsptr, long rslen, VALUE rs)
- {
- if (RSTRING_PTR(rs) != rsptr && RSTRING_LEN(rs) != rslen)
- rb_raise(rb_eRuntimeError, "rs modified");
- }
- static long
- gzreader_charboundary(struct gzfile *gz, long n)
- {
- char *s = RSTRING_PTR(gz->z.buf);
- char *e = s + ZSTREAM_BUF_FILLED(&gz->z);
- char *p = rb_enc_left_char_head(s, s + n, e, gz->enc);
- long l = p - s;
- if (l < n) {
- n = rb_enc_precise_mbclen(p, e, gz->enc);
- if (MBCLEN_NEEDMORE_P(n)) {
- if ((l = gzfile_fill(gz, l + MBCLEN_NEEDMORE_LEN(n))) > 0) {
- return l;
- }
- }
- else if (MBCLEN_CHARFOUND_P(n)) {
- return l + MBCLEN_CHARFOUND_LEN(n);
- }
- }
- return n;
- }
- static VALUE
- gzreader_gets(int argc, VALUE *argv, VALUE obj)
- {
- struct gzfile *gz = get_gzfile(obj);
- VALUE rs;
- VALUE dst;
- const char *rsptr;
- char *p, *res;
- long rslen, n, limit = -1;
- int rspara;
- rb_encoding *enc = gz->enc;
- int maxlen = rb_enc_mbmaxlen(enc);
- if (argc == 0) {
- rs = rb_rs;
- }
- else {
- VALUE lim, tmp;
- rb_scan_args(argc, argv, "11", &rs, &lim);
- if (!NIL_P(lim)) {
- if (!NIL_P(rs)) StringValue(rs);
- }
- else if (!NIL_P(rs)) {
- tmp = rb_check_string_type(rs);
- if (NIL_P(tmp)) {
- lim = rs;
- rs = rb_rs;
- }
- else {
- rs = tmp;
- }
- }
- if (!NIL_P(lim)) {
- limit = NUM2LONG(lim);
- if (limit == 0) return rb_str_new(0,0);
- }
- }
- if (NIL_P(rs)) {
- if (limit < 0) {
- dst = gzfile_read_all(gz);
- if (RSTRING_LEN(dst) == 0) return Qnil;
- }
- else if ((n = gzfile_fill(gz, limit)) <= 0) {
- return Qnil;
- }
- else {
- if (maxlen > 1 && n >= limit && !GZFILE_IS_FINISHED(gz)) {
- n = gzreader_charboundary(gz, n);
- }
- else {
- n = limit;
- }
- dst = zstream_shift_buffer(&gz->z, n);
- if (NIL_P(dst)) return dst;
- gzfile_calc_crc(gz, dst);
- dst = gzfile_newstr(gz, dst);
- }
- gz->lineno++;
- return dst;
- }
- if (RSTRING_LEN(rs) == 0) {
- rsptr = "\n\n";
- rslen = 2;
- rspara = 1;
- }
- else {
- rsptr = RSTRING_PTR(rs);
- rslen = RSTRING_LEN(rs);
- rspara = 0;
- }
- if (rspara) {
- gzreader_skip_linebreaks(gz);
- }
- while (ZSTREAM_BUF_FILLED(&gz->z) < rslen) {
- if (ZSTREAM_IS_FINISHED(&gz->z)) {
- if (ZSTREAM_BUF_FILLED(&gz->z) > 0) gz->lineno++;
- return gzfile_read(gz, rslen);
- }
- gzfile_read_more(gz, Qnil);
- }
- p = RSTRING_PTR(gz->z.buf);
- n = rslen;
- for (;;) {
- long filled;
- if (n > ZSTREAM_BUF_FILLED(&gz->z)) {
- if (ZSTREAM_IS_FINISHED(&gz->z)) break;
- gzfile_read_more(gz, Qnil);
- p = RSTRING_PTR(gz->z.buf) + n - rslen;
- }
- if (!rspara) rscheck(rsptr, rslen, rs);
- filled = ZSTREAM_BUF_FILLED(&gz->z);
- if (limit > 0 && filled >= limit) {
- filled = limit;
- }
- res = memchr(p, rsptr[0], (filled - n + 1));
- if (!res) {
- n = filled;
- if (limit > 0 && filled >= limit) break;
- n++;
- }
- else {
- n += (long)(res - p);
- p = res;
- if (rslen == 1 || memcmp(p, rsptr, rslen) == 0) break;
- p++, n++;
- }
- }
- if (maxlen > 1 && n == limit && (ZSTREAM_BUF_FILLED(&gz->z) > n || !ZSTREAM_IS_FINISHED(&gz->z))) {
- n = gzreader_charboundary(gz, n);
- }
- gz->lineno++;
- dst = gzfile_read(gz, n);
- if (NIL_P(dst)) return dst;
- if (rspara) {
- gzreader_skip_linebreaks(gz);
- }
- RB_GC_GUARD(rs);
- return gzfile_newstr(gz, dst);
- }
- /*
- * Document-method: Zlib::GzipReader#gets
- *
- * See Zlib::GzipReader documentation for a description.
- * However, note that this method can return +nil+ even if
- * #eof? returns false, unlike the behavior of File#gets.
- */
- static VALUE
- rb_gzreader_gets(int argc, VALUE *argv, VALUE obj)
- {
- VALUE dst;
- dst = gzreader_gets(argc, argv, obj);
- if (!NIL_P(dst)) {
- rb_lastline_set(dst);
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#readline
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_readline(int argc, VALUE *argv, VALUE obj)
- {
- VALUE dst;
- dst = rb_gzreader_gets(argc, argv, obj);
- if (NIL_P(dst)) {
- rb_raise(rb_eEOFError, "end of file reached");
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#each
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_each(int argc, VALUE *argv, VALUE obj)
- {
- VALUE str;
- RETURN_ENUMERATOR(obj, 0, 0);
- while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
- rb_yield(str);
- }
- return obj;
- }
- /*
- * Document-method: Zlib::GzipReader#readlines
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_readlines(int argc, VALUE *argv, VALUE obj)
- {
- VALUE str, dst;
- dst = rb_ary_new();
- while (!NIL_P(str = gzreader_gets(argc, argv, obj))) {
- rb_ary_push(dst, str);
- }
- return dst;
- }
- /*
- * Document-method: Zlib::GzipReader#external_encoding
- *
- * See Zlib::GzipReader documentation for a description.
- */
- static VALUE
- rb_gzreader_external_encoding(VALUE self)
- {
- return rb_enc_from_encoding(get_gzfile(self)->enc);
- }
- static VALUE
- zlib_gzip_end_rescue(VALUE arg)
- {
- struct gzfile *gz = (struct gzfile *)arg;
- gz->end(gz);
- return Qnil;
- }
- static VALUE
- zlib_gzip_ensure(VALUE arg)
- {
- return rb_rescue(zlib_gzip_end_rescue, arg, NULL, Qnil);
- }
- static void
- zlib_gzip_end(struct gzfile *gz)
- {
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
- zstream_run(&gz->z, (Bytef*)"", 0, Z_FINISH);
- gzfile_make_footer(gz);
- zstream_end(&gz->z);
- }
- static ID id_level, id_strategy;
- static VALUE zlib_gzip_run(VALUE arg);
- /*
- * call-seq:
- * Zlib.gzip(src, level: nil, strategy: nil) -> String
- *
- * Gzip the given +string+. Valid values of level are
- * Zlib::NO_COMPRESSION, Zlib::BEST_SPEED, Zlib::BEST_COMPRESSION,
- * Zlib::DEFAULT_COMPRESSION (default), or an integer from 0 to 9.
- *
- * This method is almost equivalent to the following code:
- *
- * def gzip(string, level: nil, strategy: nil)
- * sio = StringIO.new
- * sio.binmode
- * gz = Zlib::GzipWriter.new(sio, level, strategy)
- * gz.write(string)
- * gz.close
- * sio.string
- * end
- *
- * See also Zlib.gunzip
- *
- */
- static VALUE
- zlib_s_gzip(int argc, VALUE *argv, VALUE klass)
- {
- struct gzfile gz0;
- struct gzfile *gz = &gz0;
- int err;
- VALUE src, opts, level=Qnil, strategy=Qnil, args[2];
- if (OPTHASH_GIVEN_P(opts)) {
- ID keyword_ids[2];
- VALUE kwargs[2];
- keyword_ids[0] = id_level;
- keyword_ids[1] = id_strategy;
- rb_get_kwargs(opts, keyword_ids, 0, 2, kwargs);
- if (kwargs[0] != Qundef) {
- level = kwargs[0];
- }
- if (kwargs[1] != Qundef) {
- strategy = kwargs[1];
- }
- }
- rb_scan_args(argc, argv, "10", &src);
- StringValue(src);
- gzfile_init(gz, &deflate_funcs, zlib_gzip_end);
- gz->level = ARG_LEVEL(level);
- err = deflateInit2(&gz->z.stream, gz->level, Z_DEFLATED,
- -MAX_WBITS, DEF_MEM_LEVEL, ARG_STRATEGY(strategy));
- if (err != Z_OK) {
- zlib_gzip_end(gz);
- raise_zlib_error(err, gz->z.stream.msg);
- }
- ZSTREAM_READY(&gz->z);
- args[0] = (VALUE)gz;
- args[1] = src;
- return rb_ensure(zlib_gzip_run, (VALUE)args, zlib_gzip_ensure, (VALUE)gz);
- }
- static VALUE
- zlib_gzip_run(VALUE arg)
- {
- VALUE *args = (VALUE *)arg;
- struct gzfile *gz = (struct gzfile *)args[0];
- VALUE src = args[1];
- long len;
- gzfile_make_header(gz);
- len = RSTRING_LEN(src);
- if (len > 0) {
- Bytef *ptr = (Bytef *)RSTRING_PTR(src);
- gz->crc = checksum_long(crc32, gz->crc, ptr, len);
- zstream_run(&gz->z, ptr, len, Z_NO_FLUSH);
- }
- gzfile_close(gz, 0);
- return zstream_detach_buffer(&gz->z);
- }
- static void
- zlib_gunzip_end(struct gzfile *gz)
- {
- gz->z.flags |= ZSTREAM_FLAG_CLOSING;
- zstream_end(&gz->z);
- }
- static VALUE zlib_gunzip_run(VALUE arg);
- /*
- * call-seq:
- * Zlib.gunzip(src) -> String
- *
- * Decode the given gzipped +string+.
- *
- * This method is almost equivalent to the following code:
- *
- * def gunzip(string)
- * sio = StringIO.new(string)
- * gz = Zlib::GzipReader.new(sio, encoding: Encoding::ASCII_8BIT)
- * gz.read
- * ensure
- * gz&.close
- * end
- *
- * See also Zlib.gzip
- */
- static VALUE
- zlib_gunzip(VALUE klass, VALUE src)
- {
- struct gzfile gz0;
- struct gzfile *gz = &gz0;
- int err;
- StringValue(src);
- gzfile_init(gz, &inflate_funcs, zlib_gunzip_end);
- err = inflateInit2(&gz->z.stream, -MAX_WBITS);
- if (err != Z_OK) {
- raise_zlib_error(err, gz->z.stream.msg);
- }
- gz->io = Qundef;
- gz->z.input = src;
- ZSTREAM_READY(&gz->z);
- return rb_ensure(zlib_gunzip_run, (VALUE)gz, zlib_gzip_ensure, (VALUE)gz);
- }
- static VALUE
- zlib_gunzip_run(VALUE arg)
- {
- struct gzfile *gz = (struct gzfile *)arg;
- VALUE dst;
- gzfile_read_header(gz, Qnil);
- dst = zstream_detach_buffer(&gz->z);
- gzfile_calc_crc(gz, dst);
- if (!ZSTREAM_IS_FINISHED(&gz->z)) {
- rb_raise(cGzError, "unexpected end of file");
- }
- if (NIL_P(gz->z.input)) {
- rb_raise(cNoFooter, "footer is not found");
- }
- gzfile_check_footer(gz, Qnil);
- return dst;
- }
- #endif /* GZIP_SUPPORT */
- void
- Init_zlib(void)
- {
- #ifdef HAVE_RB_EXT_RACTOR_SAFE
- rb_ext_ractor_safe(true);
- #endif
- #undef rb_intern
- VALUE mZlib, cZStream, cDeflate, cInflate;
- #if GZIP_SUPPORT
- VALUE cGzipFile, cGzipWriter, cGzipReader;
- #endif
- mZlib = rb_define_module("Zlib");
- id_dictionaries = rb_intern("@dictionaries");
- cZError = rb_define_class_under(mZlib, "Error", rb_eStandardError);
- cStreamEnd = rb_define_class_under(mZlib, "StreamEnd", cZError);
- cNeedDict = rb_define_class_under(mZlib, "NeedDict", cZError);
- cDataError = rb_define_class_under(mZlib, "DataError", cZError);
- cStreamError = rb_define_class_under(mZlib, "StreamError", cZError);
- cMemError = rb_define_class_under(mZlib, "MemError", cZError);
- cBufError = rb_define_class_under(mZlib, "BufError", cZError);
- cVersionError = rb_define_class_under(mZlib, "VersionError", cZError);
- rb_define_module_function(mZlib, "zlib_version", rb_zlib_version, 0);
- rb_define_module_function(mZlib, "adler32", rb_zlib_adler32, -1);
- rb_define_module_function(mZlib, "adler32_combine", rb_zlib_adler32_combine, 3);
- rb_define_module_function(mZlib, "crc32", rb_zlib_crc32, -1);
- rb_define_module_function(mZlib, "crc32_combine", rb_zlib_crc32_combine, 3);
- rb_define_module_function(mZlib, "crc_table", rb_zlib_crc_table, 0);
- /* The Ruby/zlib version string. */
- rb_define_const(mZlib, "VERSION", rb_str_new2(RUBY_ZLIB_VERSION));
- /* The string which represents the version of zlib.h */
- rb_define_const(mZlib, "ZLIB_VERSION", rb_str_new2(ZLIB_VERSION));
- cZStream = rb_define_class_under(mZlib, "ZStream", rb_cObject);
- rb_undef_alloc_func(cZStream);
- rb_define_method(cZStream, "avail_out", rb_zstream_avail_out, 0);
- rb_define_method(cZStream, "avail_out=", rb_zstream_set_avail_out, 1);
- rb_define_method(cZStream, "avail_in", rb_zstream_avail_in, 0);
- rb_define_method(cZStream, "total_in", rb_zstream_total_in, 0);
- rb_define_method(cZStream, "total_out", rb_zstream_total_out, 0);
- rb_define_method(cZStream, "data_type", rb_zstream_data_type, 0);
- rb_define_method(cZStream, "adler", rb_zstream_adler, 0);
- rb_define_method(cZStream, "finished?", rb_zstream_finished_p, 0);
- rb_define_method(cZStream, "stream_end?", rb_zstream_finished_p, 0);
- rb_define_method(cZStream, "closed?", rb_zstream_closed_p, 0);
- rb_define_method(cZStream, "ended?", rb_zstream_closed_p, 0);
- rb_define_method(cZStream, "close", rb_zstream_end, 0);
- rb_define_method(cZStream, "end", rb_zstream_end, 0);
- rb_define_method(cZStream, "reset", rb_zstream_reset, 0);
- rb_define_method(cZStream, "finish", rb_zstream_finish, 0);
- rb_define_method(cZStream, "flush_next_in", rb_zstream_flush_next_in, 0);
- rb_define_method(cZStream, "flush_next_out", rb_zstream_flush_next_out, 0);
- /* Represents binary data as guessed by deflate.
- *
- * See Zlib::Deflate#data_type. */
- rb_define_const(mZlib, "BINARY", INT2FIX(Z_BINARY));
- /* Represents text data as guessed by deflate.
- *
- * NOTE: The underlying constant Z_ASCII was deprecated in favor of Z_TEXT
- * in zlib 1.2.2. New applications should not use this constant.
- *
- * See Zlib::Deflate#data_type. */
- rb_define_const(mZlib, "ASCII", INT2FIX(Z_ASCII));
- #ifdef Z_TEXT
- /* Represents text data as guessed by deflate.
- *
- * See Zlib::Deflate#data_type. */
- rb_define_const(mZlib, "TEXT", INT2FIX(Z_TEXT));
- #endif
- /* Represents an unknown data type as guessed by deflate.
- *
- * See Zlib::Deflate#data_type. */
- rb_define_const(mZlib, "UNKNOWN", INT2FIX(Z_UNKNOWN));
- cDeflate = rb_define_class_under(mZlib, "Deflate", cZStream);
- rb_define_singleton_method(cDeflate, "deflate", rb_deflate_s_deflate, -1);
- rb_define_singleton_method(mZlib, "deflate", rb_deflate_s_deflate, -1);
- rb_define_alloc_func(cDeflate, rb_deflate_s_allocate);
- rb_define_method(cDeflate, "initialize", rb_deflate_initialize, -1);
- rb_define_method(cDeflate, "initialize_copy", rb_deflate_init_copy, 1);
- rb_define_method(cDeflate, "deflate", rb_deflate_deflate, -1);
- rb_define_method(cDeflate, "<<", rb_deflate_addstr, 1);
- rb_define_method(cDeflate, "flush", rb_deflate_flush, -1);
- rb_define_method(cDeflate, "params", rb_deflate_params, 2);
- rb_define_method(cDeflate, "set_dictionary", rb_deflate_set_dictionary, 1);
- cInflate = rb_define_class_under(mZlib, "Inflate", cZStream);
- rb_define_singleton_method(cInflate, "inflate", rb_inflate_s_inflate, 1);
- rb_define_singleton_method(mZlib, "inflate", rb_inflate_s_inflate, 1);
- rb_define_alloc_func(cInflate, rb_inflate_s_allocate);
- rb_define_method(cInflate, "initialize", rb_inflate_initialize, -1);
- rb_define_method(cInflate, "add_dictionary", rb_inflate_add_dictionary, 1);
- rb_define_method(cInflate, "inflate", rb_inflate_inflate, -1);
- rb_define_method(cInflate, "<<", rb_inflate_addstr, 1);
- rb_define_method(cInflate, "sync", rb_inflate_sync, 1);
- rb_define_method(cInflate, "sync_point?", rb_inflate_sync_point_p, 0);
- rb_define_method(cInflate, "set_dictionary", rb_inflate_set_dictionary, 1);
- /* No compression, passes through data untouched. Use this for appending
- * pre-compressed data to a deflate stream.
- */
- rb_define_const(mZlib, "NO_COMPRESSION", INT2FIX(Z_NO_COMPRESSION));
- /* Fastest compression level, but with the lowest space savings. */
- rb_define_const(mZlib, "BEST_SPEED", INT2FIX(Z_BEST_SPEED));
- /* Slowest compression level, but with the best space savings. */
- rb_define_const(mZlib, "BEST_COMPRESSION", INT2FIX(Z_BEST_COMPRESSION));
- /* Default compression level which is a good trade-off between space and
- * time
- */
- rb_define_const(mZlib, "DEFAULT_COMPRESSION",
- INT2FIX(Z_DEFAULT_COMPRESSION));
- /* Deflate strategy for data produced by a filter (or predictor). The
- * effect of FILTERED is to force more Huffman codes and less string
- * matching; it is somewhat intermediate between DEFAULT_STRATEGY and
- * HUFFMAN_ONLY. Filtered data consists mostly of small values with a
- * somewhat random distribution.
- */
- rb_define_const(mZlib, "FILTERED", INT2FIX(Z_FILTERED));
- /* Deflate strategy which uses Huffman codes only (no string matching). */
- rb_define_const(mZlib, "HUFFMAN_ONLY", INT2FIX(Z_HUFFMAN_ONLY));
- #ifdef Z_RLE
- /* Deflate compression strategy designed to be almost as fast as
- * HUFFMAN_ONLY, but give better compression for PNG image data.
- */
- rb_define_const(mZlib, "RLE", INT2FIX(Z_RLE));
- #endif
- #ifdef Z_FIXED
- /* Deflate strategy which prevents the use of dynamic Huffman codes,
- * allowing for a simpler decoder for specialized applications.
- */
- rb_define_const(mZlib, "FIXED", INT2FIX(Z_FIXED));
- #endif
- /* Default deflate strategy which is used for normal data. */
- rb_define_const(mZlib, "DEFAULT_STRATEGY", INT2FIX(Z_DEFAULT_STRATEGY));
- /* The maximum size of the zlib history buffer. Note that zlib allows
- * larger values to enable different inflate modes. See Zlib::Inflate.new
- * for details.
- */
- rb_define_const(mZlib, "MAX_WBITS", INT2FIX(MAX_WBITS));
- /* The default memory level for allocating zlib deflate compression state.
- */
- rb_define_const(mZlib, "DEF_MEM_LEVEL", INT2FIX(DEF_MEM_LEVEL));
- /* The maximum memory level for allocating zlib deflate compression state.
- */
- rb_define_const(mZlib, "MAX_MEM_LEVEL", INT2FIX(MAX_MEM_LEVEL));
- /* NO_FLUSH is the default flush method and allows deflate to decide how
- * much data to accumulate before producing output in order to maximize
- * compression.
- */
- rb_define_const(mZlib, "NO_FLUSH", INT2FIX(Z_NO_FLUSH));
- /* The SYNC_FLUSH method flushes all pending output to the output buffer
- * and the output is aligned on a byte boundary. Flushing may degrade
- * compression so it should be used only when necessary, such as at a
- * request or response boundary for a network stream.
- */
- rb_define_const(mZlib, "SYNC_FLUSH", INT2FIX(Z_SYNC_FLUSH));
- /* Flushes all output as with SYNC_FLUSH, and the compression state is
- * reset so that decompression can restart from this point if previous
- * compressed data has been damaged or if random access is desired. Like
- * SYNC_FLUSH, using FULL_FLUSH too often can seriously degrade
- * compression.
- */
- rb_define_const(mZlib, "FULL_FLUSH", INT2FIX(Z_FULL_FLUSH));
- /* Processes all pending input and flushes pending output. */
- rb_define_const(mZlib, "FINISH", INT2FIX(Z_FINISH));
- #if GZIP_SUPPORT
- id_write = rb_intern("write");
- id_read = rb_intern("read");
- id_readpartial = rb_intern("readpartial");
- id_flush = rb_intern("flush");
- id_seek = rb_intern("seek");
- id_close = rb_intern("close");
- id_path = rb_intern("path");
- id_input = rb_intern("@input");
- cGzipFile = rb_define_class_under(mZlib, "GzipFile", rb_cObject);
- cGzError = rb_define_class_under(cGzipFile, "Error", cZError);
- /* input gzipped string */
- rb_define_attr(cGzError, "input", 1, 0);
- rb_define_method(cGzError, "inspect", gzfile_error_inspect, 0);
- cNoFooter = rb_define_class_under(cGzipFile, "NoFooter", cGzError);
- cCRCError = rb_define_class_under(cGzipFile, "CRCError", cGzError);
- cLengthError = rb_define_class_under(cGzipFile,"LengthError",cGzError);
- cGzipWriter = rb_define_class_under(mZlib, "GzipWriter", cGzipFile);
- cGzipReader = rb_define_class_under(mZlib, "GzipReader", cGzipFile);
- rb_include_module(cGzipReader, rb_mEnumerable);
- rb_define_singleton_method(cGzipFile, "wrap", rb_gzfile_s_wrap, -1);
- rb_undef_alloc_func(cGzipFile);
- rb_define_method(cGzipFile, "to_io", rb_gzfile_to_io, 0);
- rb_define_method(cGzipFile, "crc", rb_gzfile_crc, 0);
- rb_define_method(cGzipFile, "mtime", rb_gzfile_mtime, 0);
- rb_define_method(cGzipFile, "level", rb_gzfile_level, 0);
- rb_define_method(cGzipFile, "os_code", rb_gzfile_os_code, 0);
- rb_define_method(cGzipFile, "orig_name", rb_gzfile_orig_name, 0);
- rb_define_method(cGzipFile, "comment", rb_gzfile_comment, 0);
- rb_define_method(cGzipReader, "lineno", rb_gzfile_lineno, 0);
- rb_define_method(cGzipReader, "lineno=", rb_gzfile_set_lineno, 1);
- rb_define_method(cGzipWriter, "mtime=", rb_gzfile_set_mtime, 1);
- rb_define_method(cGzipWriter, "orig_name=", rb_gzfile_set_orig_name,1);
- rb_define_method(cGzipWriter, "comment=", rb_gzfile_set_comment, 1);
- rb_define_method(cGzipFile, "close", rb_gzfile_close, 0);
- rb_define_method(cGzipFile, "finish", rb_gzfile_finish, 0);
- rb_define_method(cGzipFile, "closed?", rb_gzfile_closed_p, 0);
- rb_define_method(cGzipReader, "eof", rb_gzfile_eof_p, 0);
- rb_define_method(cGzipReader, "eof?", rb_gzfile_eof_p, 0);
- rb_define_method(cGzipFile, "sync", rb_gzfile_sync, 0);
- rb_define_method(cGzipFile, "sync=", rb_gzfile_set_sync, 1);
- rb_define_method(cGzipReader, "pos", rb_gzfile_total_out, 0);
- rb_define_method(cGzipWriter, "pos", rb_gzfile_total_in, 0);
- rb_define_method(cGzipReader, "tell", rb_gzfile_total_out, 0);
- rb_define_method(cGzipWriter, "tell", rb_gzfile_total_in, 0);
- rb_define_singleton_method(cGzipWriter, "open", rb_gzwriter_s_open,-1);
- rb_define_alloc_func(cGzipWriter, rb_gzwriter_s_allocate);
- rb_define_method(cGzipWriter, "initialize", rb_gzwriter_initialize,-1);
- rb_define_method(cGzipWriter, "flush", rb_gzwriter_flush, -1);
- rb_define_method(cGzipWriter, "write", rb_gzwriter_write, -1);
- rb_define_method(cGzipWriter, "putc", rb_gzwriter_putc, 1);
- rb_define_method(cGzipWriter, "<<", rb_gzwriter_addstr, 1);
- rb_define_method(cGzipWriter, "printf", rb_gzwriter_printf, -1);
- rb_define_method(cGzipWriter, "print", rb_gzwriter_print, -1);
- rb_define_method(cGzipWriter, "puts", rb_gzwriter_puts, -1);
- rb_define_singleton_method(cGzipReader, "open", rb_gzreader_s_open,-1);
- rb_define_singleton_method(cGzipReader, "zcat", rb_gzreader_s_zcat, -1);
- rb_define_alloc_func(cGzipReader, rb_gzreader_s_allocate);
- rb_define_method(cGzipReader, "initialize", rb_gzreader_initialize, -1);
- rb_define_method(cGzipReader, "rewind", rb_gzreader_rewind, 0);
- rb_define_method(cGzipReader, "unused", rb_gzreader_unused, 0);
- rb_define_method(cGzipReader, "read", rb_gzreader_read, -1);
- rb_define_method(cGzipReader, "readpartial", rb_gzreader_readpartial, -1);
- rb_define_method(cGzipReader, "getc", rb_gzreader_getc, 0);
- rb_define_method(cGzipReader, "getbyte", rb_gzreader_getbyte, 0);
- rb_define_method(cGzipReader, "readchar", rb_gzreader_readchar, 0);
- rb_define_method(cGzipReader, "readbyte", rb_gzreader_readbyte, 0);
- rb_define_method(cGzipReader, "each_byte", rb_gzreader_each_byte, 0);
- rb_define_method(cGzipReader, "each_char", rb_gzreader_each_char, 0);
- rb_define_method(cGzipReader, "ungetc", rb_gzreader_ungetc, 1);
- rb_define_method(cGzipReader, "ungetbyte", rb_gzreader_ungetbyte, 1);
- rb_define_method(cGzipReader, "gets", rb_gzreader_gets, -1);
- rb_define_method(cGzipReader, "readline", rb_gzreader_readline, -1);
- rb_define_method(cGzipReader, "each", rb_gzreader_each, -1);
- rb_define_method(cGzipReader, "each_line", rb_gzreader_each, -1);
- rb_define_method(cGzipReader, "readlines", rb_gzreader_readlines, -1);
- rb_define_method(cGzipReader, "external_encoding", rb_gzreader_external_encoding, 0);
- rb_define_singleton_method(mZlib, "gzip", zlib_s_gzip, -1);
- rb_define_singleton_method(mZlib, "gunzip", zlib_gunzip, 1);
- /* The OS code of current host */
- rb_define_const(mZlib, "OS_CODE", INT2FIX(OS_CODE));
- /* OS code for MSDOS hosts */
- rb_define_const(mZlib, "OS_MSDOS", INT2FIX(OS_MSDOS));
- /* OS code for Amiga hosts */
- rb_define_const(mZlib, "OS_AMIGA", INT2FIX(OS_AMIGA));
- /* OS code for VMS hosts */
- rb_define_const(mZlib, "OS_VMS", INT2FIX(OS_VMS));
- /* OS code for UNIX hosts */
- rb_define_const(mZlib, "OS_UNIX", INT2FIX(OS_UNIX));
- /* OS code for Atari hosts */
- rb_define_const(mZlib, "OS_ATARI", INT2FIX(OS_ATARI));
- /* OS code for OS2 hosts */
- rb_define_const(mZlib, "OS_OS2", INT2FIX(OS_OS2));
- /* OS code for Mac OS hosts */
- rb_define_const(mZlib, "OS_MACOS", INT2FIX(OS_MACOS));
- /* OS code for TOPS-20 hosts */
- rb_define_const(mZlib, "OS_TOPS20", INT2FIX(OS_TOPS20));
- /* OS code for Win32 hosts */
- rb_define_const(mZlib, "OS_WIN32", INT2FIX(OS_WIN32));
- /* OS code for VM OS hosts */
- rb_define_const(mZlib, "OS_VMCMS", INT2FIX(OS_VMCMS));
- /* OS code for Z-System hosts */
- rb_define_const(mZlib, "OS_ZSYSTEM", INT2FIX(OS_ZSYSTEM));
- /* OS code for CP/M hosts */
- rb_define_const(mZlib, "OS_CPM", INT2FIX(OS_CPM));
- /* OS code for QDOS hosts */
- rb_define_const(mZlib, "OS_QDOS", INT2FIX(OS_QDOS));
- /* OS code for RISC OS hosts */
- rb_define_const(mZlib, "OS_RISCOS", INT2FIX(OS_RISCOS));
- /* OS code for unknown hosts */
- rb_define_const(mZlib, "OS_UNKNOWN", INT2FIX(OS_UNKNOWN));
- id_level = rb_intern("level");
- id_strategy = rb_intern("strategy");
- id_buffer = rb_intern("buffer");
- #endif /* GZIP_SUPPORT */
- }
- /* Document error classes. */
- /*
- * Document-class: Zlib::Error
- *
- * The superclass for all exceptions raised by Ruby/zlib.
- *
- * The following exceptions are defined as subclasses of Zlib::Error. These
- * exceptions are raised when zlib library functions return with an error
- * status.
- *
- * - Zlib::StreamEnd
- * - Zlib::NeedDict
- * - Zlib::DataError
- * - Zlib::StreamError
- * - Zlib::MemError
- * - Zlib::BufError
- * - Zlib::VersionError
- *
- */
- /*
- * Document-class: Zlib::StreamEnd
- *
- * Subclass of Zlib::Error
- *
- * When zlib returns a Z_STREAM_END
- * is return if the end of the compressed data has been reached
- * and all uncompressed out put has been produced.
- *
- */
- /*
- * Document-class: Zlib::NeedDict
- *
- * Subclass of Zlib::Error
- *
- * When zlib returns a Z_NEED_DICT
- * if a preset dictionary is needed at this point.
- *
- * Used by Zlib::Inflate.inflate and <tt>Zlib.inflate</tt>
- */
- /*
- * Document-class: Zlib::VersionError
- *
- * Subclass of Zlib::Error
- *
- * When zlib returns a Z_VERSION_ERROR,
- * usually if the zlib library version is incompatible with the
- * version assumed by the caller.
- *
- */
- /*
- * Document-class: Zlib::MemError
- *
- * Subclass of Zlib::Error
- *
- * When zlib returns a Z_MEM_ERROR,
- * usually if there was not enough memory.
- *
- */
- /*
- * Document-class: Zlib::StreamError
- *
- * Subclass of Zlib::Error
- *
- * When zlib returns a Z_STREAM_ERROR,
- * usually if the stream state was inconsistent.
- *
- */
- /*
- * Document-class: Zlib::BufError
- *
- * Subclass of Zlib::Error when zlib returns a Z_BUF_ERROR.
- *
- * Usually if no progress is possible.
- *
- */
- /*
- * Document-class: Zlib::DataError
- *
- * Subclass of Zlib::Error when zlib returns a Z_DATA_ERROR.
- *
- * Usually if a stream was prematurely freed.
- *
- */
- /*
- * Document-class: Zlib::GzipFile::Error
- *
- * Base class of errors that occur when processing GZIP files.
- */
- /*
- * Document-class: Zlib::GzipFile::NoFooter
- *
- * Raised when gzip file footer is not found.
- */
- /*
- * Document-class: Zlib::GzipFile::CRCError
- *
- * Raised when the CRC checksum recorded in gzip file footer is not equivalent
- * to the CRC checksum of the actual uncompressed data.
- */
- /*
- * Document-class: Zlib::GzipFile::LengthError
- *
- * Raised when the data length recorded in the gzip file footer is not equivalent
- * to the length of the actual uncompressed data.
- */