/**********************************************************************

  error.c -

  $Author$
  created at: Mon Aug  9 16:11:34 JST 1993

  Copyright (C) 1993-2007 Yukihiro Matsumoto

**********************************************************************/

#include "ruby/internal/config.h"

#include <errno.h>
#include <stdarg.h>
#include <stdio.h>

#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#if defined __APPLE__
# include <AvailabilityMacros.h>
#endif

#include "internal.h"
#include "internal/error.h"
#include "internal/eval.h"
#include "internal/hash.h"
#include "internal/io.h"
#include "internal/load.h"
#include "internal/object.h"
#include "internal/symbol.h"
#include "internal/thread.h"
#include "internal/variable.h"
#include "ruby/encoding.h"
#include "ruby/st.h"
#include "ruby_assert.h"
#include "vm_core.h"

#include "builtin.h"

/*!
 * \addtogroup exception
 * \{
 */

#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif

#ifndef WIFEXITED
#define WIFEXITED(status) 1
#endif

#ifndef WEXITSTATUS
#define WEXITSTATUS(status) (status)
#endif

VALUE rb_iseqw_local_variables(VALUE iseqval);
VALUE rb_iseqw_new(const rb_iseq_t *);
int rb_str_end_with_asciichar(VALUE str, int c);

long rb_backtrace_length_limit = -1;
VALUE rb_eEAGAIN;
VALUE rb_eEWOULDBLOCK;
VALUE rb_eEINPROGRESS;
static VALUE rb_mWarning;
static VALUE rb_cWarningBuffer;

static ID id_warn;
static ID id_category;
static ID id_deprecated;
static ID id_experimental;
static VALUE sym_category;
static struct {
    st_table *id2enum, *enum2id;
} warning_categories;

extern const char ruby_description[];

static const char *
rb_strerrno(int err)
{
#define defined_error(name, num) if (err == (num)) return (name);
#define undefined_error(name)
#include "known_errors.inc"
#undef defined_error
#undef undefined_error
    return NULL;
}

static int
err_position_0(char *buf, long len, const char *file, int line)
{
    if (!file) {
	return 0;
    }
    else if (line == 0) {
	return snprintf(buf, len, "%s: ", file);
    }
    else {
	return snprintf(buf, len, "%s:%d: ", file, line);
    }
}

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 5, 0)
static VALUE
err_vcatf(VALUE str, const char *pre, const char *file, int line,
	  const char *fmt, va_list args)
{
    if (file) {
	rb_str_cat2(str, file);
	if (line) rb_str_catf(str, ":%d", line);
	rb_str_cat2(str, ": ");
    }
    if (pre) rb_str_cat2(str, pre);
    rb_str_vcatf(str, fmt, args);
    return str;
}

VALUE
rb_syntax_error_append(VALUE exc, VALUE file, int line, int column,
		       rb_encoding *enc, const char *fmt, va_list args)
{
    const char *fn = NIL_P(file) ? NULL : RSTRING_PTR(file);
    if (!exc) {
	VALUE mesg = rb_enc_str_new(0, 0, enc);
	err_vcatf(mesg, NULL, fn, line, fmt, args);
	rb_str_cat2(mesg, "\n");
	rb_write_error_str(mesg);
    }
    else {
	VALUE mesg;
	if (NIL_P(exc)) {
	    mesg = rb_enc_str_new(0, 0, enc);
	    exc = rb_class_new_instance(1, &mesg, rb_eSyntaxError);
	}
	else {
	    mesg = rb_attr_get(exc, idMesg);
	    if (RSTRING_LEN(mesg) > 0 && *(RSTRING_END(mesg)-1) != '\n')
		rb_str_cat_cstr(mesg, "\n");
	}
	err_vcatf(mesg, NULL, fn, line, fmt, args);
    }

    return exc;
}

static unsigned int warning_disabled_categories = (
    1U << RB_WARN_CATEGORY_DEPRECATED |
    0);

static unsigned int
rb_warning_category_mask(VALUE category)
{
    return 1U << rb_warning_category_from_name(category);
}

rb_warning_category_t
rb_warning_category_from_name(VALUE category)
{
    st_data_t cat_value;
    ID cat_id;
    Check_Type(category, T_SYMBOL);
    if (!(cat_id = rb_check_id(&category)) ||
        !st_lookup(warning_categories.id2enum, cat_id, &cat_value)) {
        rb_raise(rb_eArgError, "unknown category: %"PRIsVALUE, category);
    }
    return (rb_warning_category_t)cat_value;
}

static VALUE
rb_warning_category_to_name(rb_warning_category_t category)
{
    st_data_t id;
    if (!st_lookup(warning_categories.enum2id, category, &id)) {
        rb_raise(rb_eArgError, "invalid category: %d", (int)category);
    }
    return id ? ID2SYM(id) : Qnil;
}

void
rb_warning_category_update(unsigned int mask, unsigned int bits)
{
    warning_disabled_categories &= ~mask;
    warning_disabled_categories |= mask & ~bits;
}

MJIT_FUNC_EXPORTED bool
rb_warning_category_enabled_p(rb_warning_category_t category)
{
    return !(warning_disabled_categories & (1U << category));
}

/*
 * call-seq:
 *    Warning[category]  -> true or false
 *
 * Returns the flag to show the warning messages for +category+.
 * Supported categories are:
 *
 * +:deprecated+ :: deprecation warnings
 * * assignment of non-nil value to <code>$,</code> and <code>$;</code>
 * * keyword arguments
 * * proc/lambda without block
 * etc.
 *
 * +:experimental+ :: experimental features
 * * Pattern matching
 */

static VALUE
rb_warning_s_aref(VALUE mod, VALUE category)
{
    rb_warning_category_t cat = rb_warning_category_from_name(category);
    return RBOOL(rb_warning_category_enabled_p(cat));
}

/*
 * call-seq:
 *    Warning[category] = flag -> flag
 *
 * Sets the warning flags for +category+.
 * See Warning.[] for the categories.
 */

static VALUE
rb_warning_s_aset(VALUE mod, VALUE category, VALUE flag)
{
    unsigned int mask = rb_warning_category_mask(category);
    unsigned int disabled = warning_disabled_categories;
    if (!RTEST(flag))
        disabled |= mask;
    else
        disabled &= ~mask;
    warning_disabled_categories = disabled;
    return flag;
}

/*
 * call-seq:
 *    warn(msg, category: nil)  -> nil
 *
 * Writes warning message +msg+ to $stderr. This method is called by
 * Ruby for all emitted warnings. A +category+ may be included with
 * the warning.
 *
 * See the documentation of the Warning module for how to customize this.
 */

static VALUE
rb_warning_s_warn(int argc, VALUE *argv, VALUE mod)
{
    VALUE str;
    VALUE opt;
    VALUE category = Qnil;

    rb_scan_args(argc, argv, "1:", &str, &opt);
    if (!NIL_P(opt)) rb_get_kwargs(opt, &id_category, 0, 1, &category);

    Check_Type(str, T_STRING);
    rb_must_asciicompat(str);
    if (!NIL_P(category)) {
        rb_warning_category_t cat = rb_warning_category_from_name(category);
        if (!rb_warning_category_enabled_p(cat)) return Qnil;
    }
    rb_write_error_str(str);
    return Qnil;
}

/*
 *  Document-module: Warning
 *
 *  The Warning module contains a single method named #warn, and the
 *  module extends itself, making Warning.warn available.
 *  Warning.warn is called for all warnings issued by Ruby.
 *  By default, warnings are printed to $stderr.
 *
 *  Changing the behavior of Warning.warn is useful to customize how warnings are
 *  handled by Ruby, for instance by filtering some warnings, and/or outputting
 *  warnings somewhere other than $stderr.
 *
 *  If you want to change the behavior of Warning.warn you should use
 *  +Warning.extend(MyNewModuleWithWarnMethod)+ and you can use `super`
 *  to get the default behavior of printing the warning to $stderr.
 *
 *  Example:
 *    module MyWarningFilter
 *      def warn(message, category: nil, **kwargs)
 *        if /some warning I want to ignore/.match?(message)
 *          # ignore
 *        else
 *          super
 *        end
 *      end
 *    end
 *    Warning.extend MyWarningFilter
 *
 *  You should never redefine Warning#warn (the instance method), as that will
 *  then no longer provide a way to use the default behavior.
 *
 *  The +warning+ gem provides convenient ways to customize Warning.warn.
 */

static VALUE
rb_warning_warn(VALUE mod, VALUE str)
{
    return rb_funcallv(mod, id_warn, 1, &str);
}


static int
rb_warning_warn_arity(void)
{
    return rb_method_entry_arity(rb_method_entry(rb_singleton_class(rb_mWarning), id_warn));
}

static VALUE
rb_warn_category(VALUE str, VALUE category)
{
    if (RUBY_DEBUG && !NIL_P(category)) {
        rb_warning_category_from_name(category);
    }

    if (rb_warning_warn_arity() == 1) {
        return rb_warning_warn(rb_mWarning, str);
    }
    else {
        VALUE args[2];
        args[0] = str;
        args[1] = rb_hash_new();
        rb_hash_aset(args[1], sym_category, category);
        return rb_funcallv_kw(rb_mWarning, id_warn, 2, args, RB_PASS_KEYWORDS);
    }
}

static void
rb_write_warning_str(VALUE str)
{
    rb_warning_warn(rb_mWarning, str);
}

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 4, 0)
static VALUE
warn_vsprintf(rb_encoding *enc, const char *file, int line, const char *fmt, va_list args)
{
    VALUE str = rb_enc_str_new(0, 0, enc);

    err_vcatf(str, "warning: ", file, line, fmt, args);
    return rb_str_cat2(str, "\n");
}

void
rb_compile_warn(const char *file, int line, const char *fmt, ...)
{
    VALUE str;
    va_list args;

    if (NIL_P(ruby_verbose)) return;

    va_start(args, fmt);
    str = warn_vsprintf(NULL, file, line, fmt, args);
    va_end(args);
    rb_write_warning_str(str);
}

/* rb_compile_warning() reports only in verbose mode */
void
rb_compile_warning(const char *file, int line, const char *fmt, ...)
{
    VALUE str;
    va_list args;

    if (!RTEST(ruby_verbose)) return;

    va_start(args, fmt);
    str = warn_vsprintf(NULL, file, line, fmt, args);
    va_end(args);
    rb_write_warning_str(str);
}

void
rb_category_compile_warn(rb_warning_category_t category, const char *file, int line, const char *fmt, ...)
{
    VALUE str;
    va_list args;

    if (NIL_P(ruby_verbose)) return;

    va_start(args, fmt);
    str = warn_vsprintf(NULL, file, line, fmt, args);
    va_end(args);
    rb_warn_category(str, rb_warning_category_to_name(category));
}

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 0)
static VALUE
warning_string(rb_encoding *enc, const char *fmt, va_list args)
{
    int line;
    const char *file = rb_source_location_cstr(&line);
    return warn_vsprintf(enc, file, line, fmt, args);
}

#define with_warning_string(mesg, enc, fmt) \
    VALUE mesg; \
    va_list args; va_start(args, fmt); \
    mesg = warning_string(enc, fmt, args); \
    va_end(args);

void
rb_warn(const char *fmt, ...)
{
    if (!NIL_P(ruby_verbose)) {
	with_warning_string(mesg, 0, fmt) {
	    rb_write_warning_str(mesg);
	}
    }
}

void
rb_category_warn(rb_warning_category_t category, const char *fmt, ...)
{
    if (!NIL_P(ruby_verbose)) {
        with_warning_string(mesg, 0, fmt) {
            rb_warn_category(mesg, rb_warning_category_to_name(category));
        }
    }
}

void
rb_enc_warn(rb_encoding *enc, const char *fmt, ...)
{
    if (!NIL_P(ruby_verbose)) {
	with_warning_string(mesg, enc, fmt) {
	    rb_write_warning_str(mesg);
	}
    }
}

/* rb_warning() reports only in verbose mode */
void
rb_warning(const char *fmt, ...)
{
    if (RTEST(ruby_verbose)) {
	with_warning_string(mesg, 0, fmt) {
	    rb_write_warning_str(mesg);
	}
    }
}

/* rb_category_warning() reports only in verbose mode */
void
rb_category_warning(rb_warning_category_t category, const char *fmt, ...)
{
    if (RTEST(ruby_verbose)) {
        with_warning_string(mesg, 0, fmt) {
            rb_warn_category(mesg, rb_warning_category_to_name(category));
        }
    }
}

VALUE
rb_warning_string(const char *fmt, ...)
{
    with_warning_string(mesg, 0, fmt) {
    }
    return mesg;
}

#if 0
void
rb_enc_warning(rb_encoding *enc, const char *fmt, ...)
{
    if (RTEST(ruby_verbose)) {
	with_warning_string(mesg, enc, fmt) {
	    rb_write_warning_str(mesg);
	}
    }
}
#endif

static bool
deprecation_warning_enabled(void)
{
    if (NIL_P(ruby_verbose)) return false;
    if (!rb_warning_category_enabled_p(RB_WARN_CATEGORY_DEPRECATED)) return false;
    return true;
}

static void
warn_deprecated(VALUE mesg, const char *removal, const char *suggest)
{
    rb_str_set_len(mesg, RSTRING_LEN(mesg) - 1);
    rb_str_cat_cstr(mesg, " is deprecated");
    if (removal) {
        rb_str_catf(mesg, " and will be removed in Ruby %s", removal);
    }
    if (suggest) rb_str_catf(mesg, "; use %s instead", suggest);
    rb_str_cat_cstr(mesg, "\n");
    rb_warn_category(mesg, ID2SYM(id_deprecated));
}

void
rb_warn_deprecated(const char *fmt, const char *suggest, ...)
{
    if (!deprecation_warning_enabled()) return;

    va_list args;
    va_start(args, suggest);
    VALUE mesg = warning_string(0, fmt, args);
    va_end(args);

    warn_deprecated(mesg, NULL, suggest);
}

void
rb_warn_deprecated_to_remove(const char *removal, const char *fmt, const char *suggest, ...)
{
    if (!deprecation_warning_enabled()) return;

    va_list args;
    va_start(args, suggest);
    VALUE mesg = warning_string(0, fmt, args);
    va_end(args);

    warn_deprecated(mesg, removal, suggest);
}

static inline int
end_with_asciichar(VALUE str, int c)
{
    return RB_TYPE_P(str, T_STRING) &&
	rb_str_end_with_asciichar(str, c);
}

/* :nodoc: */
static VALUE
warning_write(int argc, VALUE *argv, VALUE buf)
{
    while (argc-- > 0) {
	rb_str_append(buf, *argv++);
    }
    return buf;
}

VALUE rb_ec_backtrace_location_ary(const rb_execution_context_t *ec, long lev, long n, bool skip_internal);

static VALUE
rb_warn_m(rb_execution_context_t *ec, VALUE exc, VALUE msgs, VALUE uplevel, VALUE category)
{
    VALUE location = Qnil;
    int argc = RARRAY_LENINT(msgs);
    const VALUE *argv = RARRAY_CONST_PTR(msgs);

    if (!NIL_P(ruby_verbose) && argc > 0) {
        VALUE str = argv[0];
        if (!NIL_P(uplevel)) {
            long lev = NUM2LONG(uplevel);
            if (lev < 0) {
                rb_raise(rb_eArgError, "negative level (%ld)", lev);
            }
            location = rb_ec_backtrace_location_ary(ec, lev + 1, 1, TRUE);
            if (!NIL_P(location)) {
                location = rb_ary_entry(location, 0);
            }
	}
	if (argc > 1 || !NIL_P(uplevel) || !end_with_asciichar(str, '\n')) {
	    VALUE path;
	    if (NIL_P(uplevel)) {
		str = rb_str_tmp_new(0);
	    }
	    else if (NIL_P(location) ||
		     NIL_P(path = rb_funcall(location, rb_intern("path"), 0))) {
		str = rb_str_new_cstr("warning: ");
	    }
	    else {
		str = rb_sprintf("%s:%ld: warning: ",
		    rb_string_value_ptr(&path),
		    NUM2LONG(rb_funcall(location, rb_intern("lineno"), 0)));
	    }
	    RBASIC_SET_CLASS(str, rb_cWarningBuffer);
	    rb_io_puts(argc, argv, str);
	    RBASIC_SET_CLASS(str, rb_cString);
	}

        if (!NIL_P(category)) {
            category = rb_to_symbol_type(category);
            rb_warning_category_from_name(category);
        }

	if (exc == rb_mWarning) {
	    rb_must_asciicompat(str);
	    rb_write_error_str(str);
	}
	else {
            rb_warn_category(str, category);
	}
    }
    return Qnil;
}

#define MAX_BUG_REPORTERS 0x100

static struct bug_reporters {
    void (*func)(FILE *out, void *data);
    void *data;
} bug_reporters[MAX_BUG_REPORTERS];

static int bug_reporters_size;

int
rb_bug_reporter_add(void (*func)(FILE *, void *), void *data)
{
    struct bug_reporters *reporter;
    if (bug_reporters_size >= MAX_BUG_REPORTERS) {
	return 0; /* failed to register */
    }
    reporter = &bug_reporters[bug_reporters_size++];
    reporter->func = func;
    reporter->data = data;

    return 1;
}

/* SIGSEGV handler might have a very small stack. Thus we need to use it carefully. */
#define REPORT_BUG_BUFSIZ 256
static FILE *
bug_report_file(const char *file, int line)
{
    char buf[REPORT_BUG_BUFSIZ];
    FILE *out = stderr;
    int len = err_position_0(buf, sizeof(buf), file, line);

    if ((ssize_t)fwrite(buf, 1, len, out) == (ssize_t)len ||
	(ssize_t)fwrite(buf, 1, len, (out = stdout)) == (ssize_t)len) {
        return out;
    }

    return NULL;
}

FUNC_MINIMIZED(static void bug_important_message(FILE *out, const char *const msg, size_t len));

static void
bug_important_message(FILE *out, const char *const msg, size_t len)
{
    const char *const endmsg = msg + len;
    const char *p = msg;

    if (!len) return;
    if (isatty(fileno(out))) {
	static const char red[] = "\033[;31;1;7m";
	static const char green[] = "\033[;32;7m";
	static const char reset[] = "\033[m";
	const char *e = strchr(p, '\n');
	const int w = (int)(e - p);
	do {
	    int i = (int)(e - p);
	    fputs(*p == ' ' ? green : red, out);
	    fwrite(p, 1, e - p, out);
	    for (; i < w; ++i) fputc(' ', out);
	    fputs(reset, out);
	    fputc('\n', out);
	} while ((p = e + 1) < endmsg && (e = strchr(p, '\n')) != 0 && e > p + 1);
    }
    fwrite(p, 1, endmsg - p, out);
}

static void
preface_dump(FILE *out)
{
#if defined __APPLE__
    static const char msg[] = ""
	"-- Crash Report log information "
	"--------------------------------------------\n"
	"   See Crash Report log file in one of the following locations:\n"
# if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_6
	"     * ~/Library/Logs/CrashReporter\n"
	"     * /Library/Logs/CrashReporter\n"
# endif
	"     * ~/Library/Logs/DiagnosticReports\n"
	"     * /Library/Logs/DiagnosticReports\n"
	"   for more details.\n"
	"Don't forget to include the above Crash Report log file in bug reports.\n"
	"\n";
    const size_t msglen = sizeof(msg) - 1;
#else
    const char *msg = NULL;
    const size_t msglen = 0;
#endif
    bug_important_message(out, msg, msglen);
}

static void
postscript_dump(FILE *out)
{
#if defined __APPLE__
    static const char msg[] = ""
	"[IMPORTANT]"
	/*" ------------------------------------------------"*/
	"\n""Don't forget to include the Crash Report log file under\n"
# if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_6
	"CrashReporter or "
# endif
	"DiagnosticReports directory in bug reports.\n"
	/*"------------------------------------------------------------\n"*/
	"\n";
    const size_t msglen = sizeof(msg) - 1;
#else
    const char *msg = NULL;
    const size_t msglen = 0;
#endif
    bug_important_message(out, msg, msglen);
}

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 0)
static void
bug_report_begin_valist(FILE *out, const char *fmt, va_list args)
{
    char buf[REPORT_BUG_BUFSIZ];

    fputs("[BUG] ", out);
    vsnprintf(buf, sizeof(buf), fmt, args);
    fputs(buf, out);
    snprintf(buf, sizeof(buf), "\n%s\n\n", ruby_description);
    fputs(buf, out);
    preface_dump(out);
}

#define bug_report_begin(out, fmt) do { \
    va_list args; \
    va_start(args, fmt); \
    bug_report_begin_valist(out, fmt, args); \
    va_end(args); \
} while (0)

static void
bug_report_end(FILE *out)
{
    /* call additional bug reporters */
    {
	int i;
	for (i=0; i<bug_reporters_size; i++) {
	    struct bug_reporters *reporter = &bug_reporters[i];
	    (*reporter->func)(out, reporter->data);
	}
    }
    postscript_dump(out);
}

#define report_bug(file, line, fmt, ctx) do { \
    FILE *out = bug_report_file(file, line); \
    if (out) { \
	bug_report_begin(out, fmt); \
	rb_vm_bugreport(ctx); \
	bug_report_end(out); \
    } \
} while (0) \

#define report_bug_valist(file, line, fmt, ctx, args) do { \
    FILE *out = bug_report_file(file, line); \
    if (out) { \
	bug_report_begin_valist(out, fmt, args); \
	rb_vm_bugreport(ctx); \
	bug_report_end(out); \
    } \
} while (0) \

NORETURN(static void die(void));
static void
die(void)
{
#if defined(_WIN32) && defined(RUBY_MSVCRT_VERSION) && RUBY_MSVCRT_VERSION >= 80
    _set_abort_behavior( 0, _CALL_REPORTFAULT);
#endif

    abort();
}

RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 0)
void
rb_bug_without_die(const char *fmt, va_list args)
{
    const char *file = NULL;
    int line = 0;

    if (GET_EC()) {
        file = rb_source_location_cstr(&line);
    }

    report_bug_valist(file, line, fmt, NULL, args);
}

void
rb_bug(const char *fmt, ...)
{
    va_list args;
    va_start(args, fmt);
    rb_bug_without_die(fmt, args);
    va_end(args);
    die();
}

void
rb_bug_for_fatal_signal(ruby_sighandler_t default_sighandler, int sig, const void *ctx, const char *fmt, ...)
{
    const char *file = NULL;
    int line = 0;

    if (GET_EC()) {
	file = rb_source_location_cstr(&line);
    }

    report_bug(file, line, fmt, ctx);

    if (default_sighandler) default_sighandler(sig);

    die();
}


void
rb_bug_errno(const char *mesg, int errno_arg)
{
    if (errno_arg == 0)
        rb_bug("%s: errno == 0 (NOERROR)", mesg);
    else {
        const char *errno_str = rb_strerrno(errno_arg);
        if (errno_str)
            rb_bug("%s: %s (%s)", mesg, strerror(errno_arg), errno_str);
        else
            rb_bug("%s: %s (%d)", mesg, strerror(errno_arg), errno_arg);
    }
}

/*
 * this is safe to call inside signal handler and timer thread
 * (which isn't a Ruby Thread object)
 */
#define write_or_abort(fd, str, len) (write((fd), (str), (len)) < 0 ? abort() : (void)0)
#define WRITE_CONST(fd,str) write_or_abort((fd),(str),sizeof(str) - 1)

void
rb_async_bug_errno(const char *mesg, int errno_arg)
{
    WRITE_CONST(2, "[ASYNC BUG] ");
    write_or_abort(2, mesg, strlen(mesg));
    WRITE_CONST(2, "\n");

    if (errno_arg == 0) {
	WRITE_CONST(2, "errno == 0 (NOERROR)\n");
    }
    else {
	const char *errno_str = rb_strerrno(errno_arg);

	if (!errno_str)
	    errno_str = "undefined errno";
	write_or_abort(2, errno_str, strlen(errno_str));
    }
    WRITE_CONST(2, "\n\n");
    write_or_abort(2, ruby_description, strlen(ruby_description));
    abort();
}

void
rb_report_bug_valist(VALUE file, int line, const char *fmt, va_list args)
{
    report_bug_valist(RSTRING_PTR(file), line, fmt, NULL, args);
}

MJIT_FUNC_EXPORTED void
rb_assert_failure(const char *file, int line, const char *name, const char *expr)
{
    FILE *out = stderr;
    fprintf(out, "Assertion Failed: %s:%d:", file, line);
    if (name) fprintf(out, "%s:", name);
    fprintf(out, "%s\n%s\n\n", expr, ruby_description);
    preface_dump(out);
    rb_vm_bugreport(NULL);
    bug_report_end(out);
    die();
}

static const char builtin_types[][10] = {
    "", 			/* 0x00, */
    "Object",
    "Class",
    "Module",
    "Float",
    "String",
    "Regexp",
    "Array",
    "Hash",
    "Struct",
    "Integer",
    "File",
    "Data",			/* internal use: wrapped C pointers */
    "MatchData",		/* data of $~ */
    "Complex",
    "Rational",
    "",				/* 0x10 */
    "nil",
    "true",
    "false",
    "Symbol",			/* :symbol */
    "Integer",
    "undef",			/* internal use: #undef; should not happen */
    "",				/* 0x17 */
    "",				/* 0x18 */
    "",				/* 0x19 */
    "<Memo>",			/* internal use: general memo */
    "<Node>",			/* internal use: syntax tree node */
    "<iClass>", 		/* internal use: mixed-in module holder */
};

const char *
rb_builtin_type_name(int t)
{
    const char *name;
    if ((unsigned int)t >= numberof(builtin_types)) return 0;
    name = builtin_types[t];
    if (*name) return name;
    return 0;
}

static VALUE
displaying_class_of(VALUE x)
{
    switch (x) {
      case Qfalse: return rb_fstring_cstr("false");
      case Qnil:   return rb_fstring_cstr("nil");
      case Qtrue:  return rb_fstring_cstr("true");
      default:     return rb_obj_class(x);
    }
}

static const char *
builtin_class_name(VALUE x)
{
    const char *etype;

    if (NIL_P(x)) {
	etype = "nil";
    }
    else if (FIXNUM_P(x)) {
	etype = "Integer";
    }
    else if (SYMBOL_P(x)) {
	etype = "Symbol";
    }
    else if (RB_TYPE_P(x, T_TRUE)) {
	etype = "true";
    }
    else if (RB_TYPE_P(x, T_FALSE)) {
	etype = "false";
    }
    else {
	etype = NULL;
    }
    return etype;
}

const char *
rb_builtin_class_name(VALUE x)
{
    const char *etype = builtin_class_name(x);

    if (!etype) {
	etype = rb_obj_classname(x);
    }
    return etype;
}

COLDFUNC NORETURN(static void unexpected_type(VALUE, int, int));
#define UNDEF_LEAKED "undef leaked to the Ruby space"

static void
unexpected_type(VALUE x, int xt, int t)
{
    const char *tname = rb_builtin_type_name(t);
    VALUE mesg, exc = rb_eFatal;

    if (tname) {
        mesg = rb_sprintf("wrong argument type %"PRIsVALUE" (expected %s)",
                          displaying_class_of(x), tname);
	exc = rb_eTypeError;
    }
    else if (xt > T_MASK && xt <= 0x3f) {
	mesg = rb_sprintf("unknown type 0x%x (0x%x given, probably comes"
			  " from extension library for ruby 1.8)", t, xt);
    }
    else {
	mesg = rb_sprintf("unknown type 0x%x (0x%x given)", t, xt);
    }
    rb_exc_raise(rb_exc_new_str(exc, mesg));
}

void
rb_check_type(VALUE x, int t)
{
    int xt;

    if (RB_UNLIKELY(x == Qundef)) {
	rb_bug(UNDEF_LEAKED);
    }

    xt = TYPE(x);
    if (xt != t || (xt == T_DATA && rbimpl_rtypeddata_p(x))) {
        /*
         * Typed data is not simple `T_DATA`, but in a sense an
         * extension of `struct RVALUE`, which are incompatible with
         * each other except when inherited.
         *
         * So it is not enough to just check `T_DATA`, it must be
         * identified by its `type` using `Check_TypedStruct` instead.
         */
	unexpected_type(x, xt, t);
    }
}

void
rb_unexpected_type(VALUE x, int t)
{
    if (RB_UNLIKELY(x == Qundef)) {
	rb_bug(UNDEF_LEAKED);
    }

    unexpected_type(x, TYPE(x), t);
}

int
rb_typeddata_inherited_p(const rb_data_type_t *child, const rb_data_type_t *parent)
{
    while (child) {
	if (child == parent) return 1;
	child = child->parent;
    }
    return 0;
}

int
rb_typeddata_is_kind_of(VALUE obj, const rb_data_type_t *data_type)
{
    if (!RB_TYPE_P(obj, T_DATA) ||
	!RTYPEDDATA_P(obj) || !rb_typeddata_inherited_p(RTYPEDDATA_TYPE(obj), data_type)) {
	return 0;
    }
    return 1;
}

#undef rb_typeddata_is_instance_of
int
rb_typeddata_is_instance_of(VALUE obj, const rb_data_type_t *data_type)
{
    return rb_typeddata_is_instance_of_inline(obj, data_type);
}

void *
rb_check_typeddata(VALUE obj, const rb_data_type_t *data_type)
{
    VALUE actual;

    if (!RB_TYPE_P(obj, T_DATA)) {
        actual = displaying_class_of(obj);
    }
    else if (!RTYPEDDATA_P(obj)) {
        actual = displaying_class_of(obj);
    }
    else if (!rb_typeddata_inherited_p(RTYPEDDATA_TYPE(obj), data_type)) {
        const char *name = RTYPEDDATA_TYPE(obj)->wrap_struct_name;
        actual = rb_str_new_cstr(name); /* or rb_fstring_cstr? not sure... */
    }
    else {
        return DATA_PTR(obj);
    }

    const char *expected = data_type->wrap_struct_name;
    rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (expected %s)",
             actual, expected);
    UNREACHABLE_RETURN(NULL);
}

/* exception classes */
VALUE rb_eException;
VALUE rb_eSystemExit;
VALUE rb_eInterrupt;
VALUE rb_eSignal;
VALUE rb_eFatal;
VALUE rb_eStandardError;
VALUE rb_eRuntimeError;
VALUE rb_eFrozenError;
VALUE rb_eTypeError;
VALUE rb_eArgError;
VALUE rb_eIndexError;
VALUE rb_eKeyError;
VALUE rb_eRangeError;
VALUE rb_eNameError;
VALUE rb_eEncodingError;
VALUE rb_eEncCompatError;
VALUE rb_eNoMethodError;
VALUE rb_eSecurityError;
VALUE rb_eNotImpError;
VALUE rb_eNoMemError;
VALUE rb_cNameErrorMesg;
VALUE rb_eNoMatchingPatternError;
VALUE rb_eNoMatchingPatternKeyError;

VALUE rb_eScriptError;
VALUE rb_eSyntaxError;
VALUE rb_eLoadError;

VALUE rb_eSystemCallError;
VALUE rb_mErrno;
static VALUE rb_eNOERROR;

ID ruby_static_id_cause;
#define id_cause ruby_static_id_cause
static ID id_message, id_backtrace;
static ID id_key, id_matchee, id_args, id_Errno, id_errno, id_i_path;
static ID id_receiver, id_recv, id_iseq, id_local_variables;
static ID id_private_call_p, id_top, id_bottom;
#define id_bt idBt
#define id_bt_locations idBt_locations
#define id_mesg idMesg
#define id_name idName

#undef rb_exc_new_cstr

VALUE
rb_exc_new(VALUE etype, const char *ptr, long len)
{
    VALUE mesg = rb_str_new(ptr, len);
    return rb_class_new_instance(1, &mesg, etype);
}

VALUE
rb_exc_new_cstr(VALUE etype, const char *s)
{
    return rb_exc_new(etype, s, strlen(s));
}

VALUE
rb_exc_new_str(VALUE etype, VALUE str)
{
    StringValue(str);
    return rb_class_new_instance(1, &str, etype);
}

static VALUE
exc_init(VALUE exc, VALUE mesg)
{
    rb_ivar_set(exc, id_mesg, mesg);
    rb_ivar_set(exc, id_bt, Qnil);

    return exc;
}

/*
 * call-seq:
 *    Exception.new(msg = nil)        ->  exception
 *    Exception.exception(msg = nil)  ->  exception
 *
 *  Construct a new Exception object, optionally passing in
 *  a message.
 */

static VALUE
exc_initialize(int argc, VALUE *argv, VALUE exc)
{
    VALUE arg;

    arg = (!rb_check_arity(argc, 0, 1) ? Qnil : argv[0]);
    return exc_init(exc, arg);
}

/*
 *  Document-method: exception
 *
 *  call-seq:
 *     exc.exception([string])  ->  an_exception or exc
 *
 *  With no argument, or if the argument is the same as the receiver,
 *  return the receiver. Otherwise, create a new
 *  exception object of the same class as the receiver, but with a
 *  message equal to <code>string.to_str</code>.
 *
 */

static VALUE
exc_exception(int argc, VALUE *argv, VALUE self)
{
    VALUE exc;

    argc = rb_check_arity(argc, 0, 1);
    if (argc == 0) return self;
    if (argc == 1 && self == argv[0]) return self;
    exc = rb_obj_clone(self);
    rb_ivar_set(exc, id_mesg, argv[0]);
    return exc;
}

/*
 * call-seq:
 *   exception.to_s   ->  string
 *
 * Returns exception's message (or the name of the exception if
 * no message is set).
 */

static VALUE
exc_to_s(VALUE exc)
{
    VALUE mesg = rb_attr_get(exc, idMesg);

    if (NIL_P(mesg)) return rb_class_name(CLASS_OF(exc));
    return rb_String(mesg);
}

/* FIXME: Include eval_error.c */
void rb_error_write(VALUE errinfo, VALUE emesg, VALUE errat, VALUE str, VALUE highlight, VALUE reverse);

VALUE
rb_get_message(VALUE exc)
{
    VALUE e = rb_check_funcall(exc, id_message, 0, 0);
    if (e == Qundef) return Qnil;
    if (!RB_TYPE_P(e, T_STRING)) e = rb_check_string_type(e);
    return e;
}

/*
 * call-seq:
 *    Exception.to_tty?   ->  true or false
 *
 * Returns +true+ if exception messages will be sent to a tty.
 */
static VALUE
exc_s_to_tty_p(VALUE self)
{
    return RBOOL(rb_stderr_tty_p());
}

/*
 * call-seq:
 *   exception.full_message(highlight: bool, order: [:top or :bottom]) ->  string
 *
 * Returns formatted string of _exception_.
 * The returned string is formatted using the same format that Ruby uses
 * when printing an uncaught exceptions to stderr.
 *
 * If _highlight_ is +true+ the default error handler will send the
 * messages to a tty.
 *
 * _order_ must be either of +:top+ or +:bottom+, and places the error
 * message and the innermost backtrace come at the top or the bottom.
 *
 * The default values of these options depend on <code>$stderr</code>
 * and its +tty?+ at the timing of a call.
 */

static VALUE
exc_full_message(int argc, VALUE *argv, VALUE exc)
{
    VALUE opt, str, emesg, errat;
    enum {kw_highlight, kw_order, kw_max_};
    static ID kw[kw_max_];
    VALUE args[kw_max_] = {Qnil, Qnil};

    rb_scan_args(argc, argv, "0:", &opt);
    if (!NIL_P(opt)) {
	if (!kw[0]) {
#define INIT_KW(n) kw[kw_##n] = rb_intern_const(#n)
	    INIT_KW(highlight);
	    INIT_KW(order);
#undef INIT_KW
	}
	rb_get_kwargs(opt, kw, 0, kw_max_, args);
	switch (args[kw_highlight]) {
	  default:
            rb_bool_expected(args[kw_highlight], "highlight");
	    UNREACHABLE;
	  case Qundef: args[kw_highlight] = Qnil; break;
	  case Qtrue: case Qfalse: case Qnil: break;
	}
	if (args[kw_order] == Qundef) {
	    args[kw_order] = Qnil;
	}
	else {
	    ID id = rb_check_id(&args[kw_order]);
	    if (id == id_bottom) args[kw_order] = Qtrue;
	    else if (id == id_top) args[kw_order] = Qfalse;
	    else {
		rb_raise(rb_eArgError, "expected :top or :bottom as "
			 "order: %+"PRIsVALUE, args[kw_order]);
	    }
	}
    }
    str = rb_str_new2("");
    errat = rb_get_backtrace(exc);
    emesg = rb_get_message(exc);

    rb_error_write(exc, emesg, errat, str, args[kw_highlight], args[kw_order]);
    return str;
}

/*
 * call-seq:
 *   exception.message   ->  string
 *
 * Returns the result of invoking <code>exception.to_s</code>.
 * Normally this returns the exception's message or name.
 */

static VALUE
exc_message(VALUE exc)
{
    return rb_funcallv(exc, idTo_s, 0, 0);
}

/*
 * call-seq:
 *   exception.inspect   -> string
 *
 * Return this exception's class name and message.
 */

static VALUE
exc_inspect(VALUE exc)
{
    VALUE str, klass;

    klass = CLASS_OF(exc);
    exc = rb_obj_as_string(exc);
    if (RSTRING_LEN(exc) == 0) {
        return rb_class_name(klass);
    }

    str = rb_str_buf_new2("#<");
    klass = rb_class_name(klass);
    rb_str_buf_append(str, klass);
    rb_str_buf_cat(str, ": ", 2);
    rb_str_buf_append(str, exc);
    rb_str_buf_cat(str, ">", 1);

    return str;
}

/*
 *  call-seq:
 *     exception.backtrace    -> array or nil
 *
 *  Returns any backtrace associated with the exception. The backtrace
 *  is an array of strings, each containing either ``filename:lineNo: in
 *  `method''' or ``filename:lineNo.''
 *
 *     def a
 *       raise "boom"
 *     end
 *
 *     def b
 *       a()
 *     end
 *
 *     begin
 *       b()
 *     rescue => detail
 *       print detail.backtrace.join("\n")
 *     end
 *
 *  <em>produces:</em>
 *
 *     prog.rb:2:in `a'
 *     prog.rb:6:in `b'
 *     prog.rb:10
 *
 *  In the case no backtrace has been set, +nil+ is returned
 *
 *    ex = StandardError.new
 *    ex.backtrace
 *    #=> nil
*/

static VALUE
exc_backtrace(VALUE exc)
{
    VALUE obj;

    obj = rb_attr_get(exc, id_bt);

    if (rb_backtrace_p(obj)) {
	obj = rb_backtrace_to_str_ary(obj);
	/* rb_ivar_set(exc, id_bt, obj); */
    }

    return obj;
}

static VALUE rb_check_backtrace(VALUE);

VALUE
rb_get_backtrace(VALUE exc)
{
    ID mid = id_backtrace;
    VALUE info;
    if (rb_method_basic_definition_p(CLASS_OF(exc), id_backtrace)) {
	VALUE klass = rb_eException;
	rb_execution_context_t *ec = GET_EC();
	if (NIL_P(exc))
	    return Qnil;
	EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_CALL, exc, mid, mid, klass, Qundef);
	info = exc_backtrace(exc);
	EXEC_EVENT_HOOK(ec, RUBY_EVENT_C_RETURN, exc, mid, mid, klass, info);
    }
    else {
	info = rb_funcallv(exc, mid, 0, 0);
    }
    if (NIL_P(info)) return Qnil;
    return rb_check_backtrace(info);
}

/*
 *  call-seq:
 *     exception.backtrace_locations    -> array or nil
 *
 *  Returns any backtrace associated with the exception. This method is
 *  similar to Exception#backtrace, but the backtrace is an array of
 *  Thread::Backtrace::Location.
 *
 *  This method is not affected by Exception#set_backtrace().
 */
static VALUE
exc_backtrace_locations(VALUE exc)
{
    VALUE obj;

    obj = rb_attr_get(exc, id_bt_locations);
    if (!NIL_P(obj)) {
	obj = rb_backtrace_to_location_ary(obj);
    }
    return obj;
}

static VALUE
rb_check_backtrace(VALUE bt)
{
    long i;
    static const char err[] = "backtrace must be Array of String";

    if (!NIL_P(bt)) {
	if (RB_TYPE_P(bt, T_STRING)) return rb_ary_new3(1, bt);
	if (rb_backtrace_p(bt)) return bt;
	if (!RB_TYPE_P(bt, T_ARRAY)) {
	    rb_raise(rb_eTypeError, err);
	}
	for (i=0;i<RARRAY_LEN(bt);i++) {
	    VALUE e = RARRAY_AREF(bt, i);
	    if (!RB_TYPE_P(e, T_STRING)) {
		rb_raise(rb_eTypeError, err);
	    }
	}
    }
    return bt;
}

/*
 *  call-seq:
 *     exc.set_backtrace(backtrace)   ->  array
 *
 *  Sets the backtrace information associated with +exc+. The +backtrace+ must
 *  be an array of String objects or a single String in the format described
 *  in Exception#backtrace.
 *
 */

static VALUE
exc_set_backtrace(VALUE exc, VALUE bt)
{
    return rb_ivar_set(exc, id_bt, rb_check_backtrace(bt));
}

MJIT_FUNC_EXPORTED VALUE
rb_exc_set_backtrace(VALUE exc, VALUE bt)
{
    return exc_set_backtrace(exc, bt);
}

/*
 * call-seq:
 *   exception.cause   -> an_exception or nil
 *
 * Returns the previous exception ($!) at the time this exception was raised.
 * This is useful for wrapping exceptions and retaining the original exception
 * information.
 */

static VALUE
exc_cause(VALUE exc)
{
    return rb_attr_get(exc, id_cause);
}

static VALUE
try_convert_to_exception(VALUE obj)
{
    return rb_check_funcall(obj, idException, 0, 0);
}

/*
 *  call-seq:
 *     exc == obj   -> true or false
 *
 *  Equality---If <i>obj</i> is not an Exception, returns
 *  <code>false</code>. Otherwise, returns <code>true</code> if <i>exc</i> and
 *  <i>obj</i> share same class, messages, and backtrace.
 */

static VALUE
exc_equal(VALUE exc, VALUE obj)
{
    VALUE mesg, backtrace;

    if (exc == obj) return Qtrue;

    if (rb_obj_class(exc) != rb_obj_class(obj)) {
	int state;

	obj = rb_protect(try_convert_to_exception, obj, &state);
	if (state || obj == Qundef) {
	    rb_set_errinfo(Qnil);
	    return Qfalse;
	}
	if (rb_obj_class(exc) != rb_obj_class(obj)) return Qfalse;
	mesg = rb_check_funcall(obj, id_message, 0, 0);
	if (mesg == Qundef) return Qfalse;
	backtrace = rb_check_funcall(obj, id_backtrace, 0, 0);
	if (backtrace == Qundef) return Qfalse;
    }
    else {
	mesg = rb_attr_get(obj, id_mesg);
	backtrace = exc_backtrace(obj);
    }

    if (!rb_equal(rb_attr_get(exc, id_mesg), mesg))
	return Qfalse;
    return rb_equal(exc_backtrace(exc), backtrace);
}

/*
 * call-seq:
 *   SystemExit.new              -> system_exit
 *   SystemExit.new(status)      -> system_exit
 *   SystemExit.new(status, msg) -> system_exit
 *   SystemExit.new(msg)         -> system_exit
 *
 * Create a new +SystemExit+ exception with the given status and message.
 * Status is true, false, or an integer.
 * If status is not given, true is used.
 */

static VALUE
exit_initialize(int argc, VALUE *argv, VALUE exc)
{
    VALUE status;
    if (argc > 0) {
	status = *argv;

	switch (status) {
	  case Qtrue:
	    status = INT2FIX(EXIT_SUCCESS);
	    ++argv;
	    --argc;
	    break;
	  case Qfalse:
	    status = INT2FIX(EXIT_FAILURE);
	    ++argv;
	    --argc;
	    break;
	  default:
	    status = rb_check_to_int(status);
	    if (NIL_P(status)) {
		status = INT2FIX(EXIT_SUCCESS);
	    }
	    else {
#if EXIT_SUCCESS != 0
		if (status == INT2FIX(0))
		    status = INT2FIX(EXIT_SUCCESS);
#endif
		++argv;
		--argc;
	    }
	    break;
	}
    }
    else {
	status = INT2FIX(EXIT_SUCCESS);
    }
    rb_call_super(argc, argv);
    rb_ivar_set(exc, id_status, status);
    return exc;
}


/*
 * call-seq:
 *   system_exit.status   -> integer
 *
 * Return the status value associated with this system exit.
 */

static VALUE
exit_status(VALUE exc)
{
    return rb_attr_get(exc, id_status);
}


/*
 * call-seq:
 *   system_exit.success?  -> true or false
 *
 * Returns +true+ if exiting successful, +false+ if not.
 */

static VALUE
exit_success_p(VALUE exc)
{
    VALUE status_val = rb_attr_get(exc, id_status);
    int status;

    if (NIL_P(status_val))
	return Qtrue;
    status = NUM2INT(status_val);
    return RBOOL(WIFEXITED(status) && WEXITSTATUS(status) == EXIT_SUCCESS);
}

static VALUE
err_init_recv(VALUE exc, VALUE recv)
{
    if (recv != Qundef) rb_ivar_set(exc, id_recv, recv);
    return exc;
}

/*
 * call-seq:
 *   FrozenError.new(msg=nil, receiver: nil)  -> frozen_error
 *
 * Construct a new FrozenError exception. If given the <i>receiver</i>
 * parameter may subsequently be examined using the FrozenError#receiver
 * method.
 *
 *    a = [].freeze
 *    raise FrozenError.new("can't modify frozen array", receiver: a)
 */

static VALUE
frozen_err_initialize(int argc, VALUE *argv, VALUE self)
{
    ID keywords[1];
    VALUE values[numberof(keywords)], options;

    argc = rb_scan_args(argc, argv, "*:", NULL, &options);
    keywords[0] = id_receiver;
    rb_get_kwargs(options, keywords, 0, numberof(values), values);
    rb_call_super(argc, argv);
    err_init_recv(self, values[0]);
    return self;
}

/*
 * Document-method: FrozenError#receiver
 * call-seq:
 *   frozen_error.receiver  -> object
 *
 * Return the receiver associated with this FrozenError exception.
 */

#define frozen_err_receiver name_err_receiver

void
rb_name_error(ID id, const char *fmt, ...)
{
    VALUE exc, argv[2];
    va_list args;

    va_start(args, fmt);
    argv[0] = rb_vsprintf(fmt, args);
    va_end(args);

    argv[1] = ID2SYM(id);
    exc = rb_class_new_instance(2, argv, rb_eNameError);
    rb_exc_raise(exc);
}

void
rb_name_error_str(VALUE str, const char *fmt, ...)
{
    VALUE exc, argv[2];
    va_list args;

    va_start(args, fmt);
    argv[0] = rb_vsprintf(fmt, args);
    va_end(args);

    argv[1] = str;
    exc = rb_class_new_instance(2, argv, rb_eNameError);
    rb_exc_raise(exc);
}

static VALUE
name_err_init_attr(VALUE exc, VALUE recv, VALUE method)
{
    const rb_execution_context_t *ec = GET_EC();
    rb_control_frame_t *cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(ec->cfp);
    cfp = rb_vm_get_ruby_level_next_cfp(ec, cfp);
    rb_ivar_set(exc, id_name, method);
    err_init_recv(exc, recv);
    if (cfp) rb_ivar_set(exc, id_iseq, rb_iseqw_new(cfp->iseq));
    return exc;
}

/*
 * call-seq:
 *   NameError.new(msg=nil, name=nil, receiver: nil)  -> name_error
 *
 * Construct a new NameError exception. If given the <i>name</i>
 * parameter may subsequently be examined using the NameError#name
 * method. <i>receiver</i> parameter allows to pass object in
 * context of which the error happened. Example:
 *
 *    [1, 2, 3].method(:rject) # NameError with name "rject" and receiver: Array
 *    [1, 2, 3].singleton_method(:rject) # NameError with name "rject" and receiver: [1, 2, 3]
 */

static VALUE
name_err_initialize(int argc, VALUE *argv, VALUE self)
{
    ID keywords[1];
    VALUE values[numberof(keywords)], name, options;

    argc = rb_scan_args(argc, argv, "*:", NULL, &options);
    keywords[0] = id_receiver;
    rb_get_kwargs(options, keywords, 0, numberof(values), values);
    name = (argc > 1) ? argv[--argc] : Qnil;
    rb_call_super(argc, argv);
    name_err_init_attr(self, values[0], name);
    return self;
}

static VALUE rb_name_err_mesg_new(VALUE mesg, VALUE recv, VALUE method);

static VALUE
name_err_init(VALUE exc, VALUE mesg, VALUE recv, VALUE method)
{
    exc_init(exc, rb_name_err_mesg_new(mesg, recv, method));
    return name_err_init_attr(exc, recv, method);
}

VALUE
rb_name_err_new(VALUE mesg, VALUE recv, VALUE method)
{
    VALUE exc = rb_obj_alloc(rb_eNameError);
    return name_err_init(exc, mesg, recv, method);
}

/*
 *  call-seq:
 *    name_error.name    ->  string or nil
 *
 *  Return the name associated with this NameError exception.
 */

static VALUE
name_err_name(VALUE self)
{
    return rb_attr_get(self, id_name);
}

/*
 *  call-seq:
 *    name_error.local_variables  ->  array
 *
 *  Return a list of the local variable names defined where this
 *  NameError exception was raised.
 *
 *  Internal use only.
 */

static VALUE
name_err_local_variables(VALUE self)
{
    VALUE vars = rb_attr_get(self, id_local_variables);

    if (NIL_P(vars)) {
	VALUE iseqw = rb_attr_get(self, id_iseq);
	if (!NIL_P(iseqw)) vars = rb_iseqw_local_variables(iseqw);
	if (NIL_P(vars)) vars = rb_ary_new();
	rb_ivar_set(self, id_local_variables, vars);
    }
    return vars;
}

static VALUE
nometh_err_init_attr(VALUE exc, VALUE args, int priv)
{
    rb_ivar_set(exc, id_args, args);
    rb_ivar_set(exc, id_private_call_p, RBOOL(priv));
    return exc;
}

/*
 * call-seq:
 *   NoMethodError.new(msg=nil, name=nil, args=nil, private=false, receiver: nil)  -> no_method_error
 *
 * Construct a NoMethodError exception for a method of the given name
 * called with the given arguments. The name may be accessed using
 * the <code>#name</code> method on the resulting object, and the
 * arguments using the <code>#args</code> method.
 *
 * If <i>private</i> argument were passed, it designates method was
 * attempted to call in private context, and can be accessed with
 * <code>#private_call?</code> method.
 *
 * <i>receiver</i> argument stores an object whose method was called.
 */

static VALUE
nometh_err_initialize(int argc, VALUE *argv, VALUE self)
{
    int priv;
    VALUE args, options;
    argc = rb_scan_args(argc, argv, "*:", NULL, &options);
    priv = (argc > 3) && (--argc, RTEST(argv[argc]));
    args = (argc > 2) ? argv[--argc] : Qnil;
    if (!NIL_P(options)) argv[argc++] = options;
    rb_call_super_kw(argc, argv, RB_PASS_CALLED_KEYWORDS);
    return nometh_err_init_attr(self, args, priv);
}

VALUE
rb_nomethod_err_new(VALUE mesg, VALUE recv, VALUE method, VALUE args, int priv)
{
    VALUE exc = rb_obj_alloc(rb_eNoMethodError);
    name_err_init(exc, mesg, recv, method);
    return nometh_err_init_attr(exc, args, priv);
}

/* :nodoc: */
enum {
    NAME_ERR_MESG__MESG,
    NAME_ERR_MESG__RECV,
    NAME_ERR_MESG__NAME,
    NAME_ERR_MESG_COUNT
};

static void
name_err_mesg_mark(void *p)
{
    VALUE *ptr = p;
    rb_gc_mark_locations(ptr, ptr+NAME_ERR_MESG_COUNT);
}

#define name_err_mesg_free RUBY_TYPED_DEFAULT_FREE

static size_t
name_err_mesg_memsize(const void *p)
{
    return NAME_ERR_MESG_COUNT * sizeof(VALUE);
}

static const rb_data_type_t name_err_mesg_data_type = {
    "name_err_mesg",
    {
	name_err_mesg_mark,
	name_err_mesg_free,
	name_err_mesg_memsize,
    },
    0, 0, RUBY_TYPED_FREE_IMMEDIATELY
};

/* :nodoc: */
static VALUE
rb_name_err_mesg_init(VALUE klass, VALUE mesg, VALUE recv, VALUE method)
{
    VALUE result = TypedData_Wrap_Struct(klass, &name_err_mesg_data_type, 0);
    VALUE *ptr = ALLOC_N(VALUE, NAME_ERR_MESG_COUNT);

    ptr[NAME_ERR_MESG__MESG] = mesg;
    ptr[NAME_ERR_MESG__RECV] = recv;
    ptr[NAME_ERR_MESG__NAME] = method;
    RTYPEDDATA_DATA(result) = ptr;
    return result;
}

/* :nodoc: */
static VALUE
rb_name_err_mesg_new(VALUE mesg, VALUE recv, VALUE method)
{
    return rb_name_err_mesg_init(rb_cNameErrorMesg, mesg, recv, method);
}

/* :nodoc: */
static VALUE
name_err_mesg_alloc(VALUE klass)
{
    return rb_name_err_mesg_init(klass, Qnil, Qnil, Qnil);
}

/* :nodoc: */
static VALUE
name_err_mesg_init_copy(VALUE obj1, VALUE obj2)
{
    VALUE *ptr1, *ptr2;

    if (obj1 == obj2) return obj1;
    rb_obj_init_copy(obj1, obj2);

    TypedData_Get_Struct(obj1, VALUE, &name_err_mesg_data_type, ptr1);
    TypedData_Get_Struct(obj2, VALUE, &name_err_mesg_data_type, ptr2);
    MEMCPY(ptr1, ptr2, VALUE, NAME_ERR_MESG_COUNT);
    return obj1;
}

/* :nodoc: */
static VALUE
name_err_mesg_equal(VALUE obj1, VALUE obj2)
{
    VALUE *ptr1, *ptr2;
    int i;

    if (obj1 == obj2) return Qtrue;
    if (rb_obj_class(obj2) != rb_cNameErrorMesg)
	return Qfalse;

    TypedData_Get_Struct(obj1, VALUE, &name_err_mesg_data_type, ptr1);
    TypedData_Get_Struct(obj2, VALUE, &name_err_mesg_data_type, ptr2);
    for (i=0; i<NAME_ERR_MESG_COUNT; i++) {
	if (!rb_equal(ptr1[i], ptr2[i]))
	    return Qfalse;
    }
    return Qtrue;
}

/* :nodoc: */
static VALUE
name_err_mesg_receiver_name(VALUE obj)
{
    if (RB_SPECIAL_CONST_P(obj)) return Qundef;
    if (RB_BUILTIN_TYPE(obj) == T_MODULE || RB_BUILTIN_TYPE(obj) == T_CLASS) {
        return rb_check_funcall(obj, rb_intern("name"), 0, 0);
    }
    return Qundef;
}

/* :nodoc: */
static VALUE
name_err_mesg_to_str(VALUE obj)
{
    VALUE *ptr, mesg;
    TypedData_Get_Struct(obj, VALUE, &name_err_mesg_data_type, ptr);

    mesg = ptr[NAME_ERR_MESG__MESG];
    if (NIL_P(mesg)) return Qnil;
    else {
	struct RString s_str, d_str;
	VALUE c, s, d = 0, args[4];
	int state = 0, singleton = 0;
	rb_encoding *usascii = rb_usascii_encoding();

#define FAKE_CSTR(v, str) rb_setup_fake_str((v), (str), rb_strlen_lit(str), usascii)
	obj = ptr[NAME_ERR_MESG__RECV];
	switch (obj) {
	  case Qnil:
	    d = FAKE_CSTR(&d_str, "nil");
	    break;
	  case Qtrue:
	    d = FAKE_CSTR(&d_str, "true");
	    break;
	  case Qfalse:
	    d = FAKE_CSTR(&d_str, "false");
	    break;
	  default:
	    d = rb_protect(name_err_mesg_receiver_name, obj, &state);
	    if (state || d == Qundef || d == Qnil)
		d = rb_protect(rb_inspect, obj, &state);
	    if (state) {
		rb_set_errinfo(Qnil);
	    }
	    d = rb_check_string_type(d);
	    if (NIL_P(d)) {
		d = rb_any_to_s(obj);
	    }
	    singleton = (RSTRING_LEN(d) > 0 && RSTRING_PTR(d)[0] == '#');
	    break;
	}
	if (!singleton) {
	    s = FAKE_CSTR(&s_str, ":");
	    c = rb_class_name(CLASS_OF(obj));
	}
	else {
	    c = s = FAKE_CSTR(&s_str, "");
	}
        args[0] = rb_obj_as_string(ptr[NAME_ERR_MESG__NAME]);
	args[1] = d;
	args[2] = s;
	args[3] = c;
	mesg = rb_str_format(4, args, mesg);
    }
    return mesg;
}

/* :nodoc: */
static VALUE
name_err_mesg_dump(VALUE obj, VALUE limit)
{
    return name_err_mesg_to_str(obj);
}

/* :nodoc: */
static VALUE
name_err_mesg_load(VALUE klass, VALUE str)
{
    return str;
}

/*
 * call-seq:
 *   name_error.receiver  -> object
 *
 * Return the receiver associated with this NameError exception.
 */

static VALUE
name_err_receiver(VALUE self)
{
    VALUE *ptr, recv, mesg;

    recv = rb_ivar_lookup(self, id_recv, Qundef);
    if (recv != Qundef) return recv;

    mesg = rb_attr_get(self, id_mesg);
    if (!rb_typeddata_is_kind_of(mesg, &name_err_mesg_data_type)) {
	rb_raise(rb_eArgError, "no receiver is available");
    }
    ptr = DATA_PTR(mesg);
    return ptr[NAME_ERR_MESG__RECV];
}

/*
 * call-seq:
 *   no_method_error.args  -> obj
 *
 * Return the arguments passed in as the third parameter to
 * the constructor.
 */

static VALUE
nometh_err_args(VALUE self)
{
    return rb_attr_get(self, id_args);
}

/*
 * call-seq:
 *   no_method_error.private_call?  -> true or false
 *
 * Return true if the caused method was called as private.
 */

static VALUE
nometh_err_private_call_p(VALUE self)
{
    return rb_attr_get(self, id_private_call_p);
}

void
rb_invalid_str(const char *str, const char *type)
{
    VALUE s = rb_str_new2(str);

    rb_raise(rb_eArgError, "invalid value for %s: %+"PRIsVALUE, type, s);
}

/*
 * call-seq:
 *   key_error.receiver  -> object
 *
 * Return the receiver associated with this KeyError exception.
 */

static VALUE
key_err_receiver(VALUE self)
{
    VALUE recv;

    recv = rb_ivar_lookup(self, id_receiver, Qundef);
    if (recv != Qundef) return recv;
    rb_raise(rb_eArgError, "no receiver is available");
}

/*
 * call-seq:
 *   key_error.key  -> object
 *
 * Return the key caused this KeyError exception.
 */

static VALUE
key_err_key(VALUE self)
{
    VALUE key;

    key = rb_ivar_lookup(self, id_key, Qundef);
    if (key != Qundef) return key;
    rb_raise(rb_eArgError, "no key is available");
}

VALUE
rb_key_err_new(VALUE mesg, VALUE recv, VALUE key)
{
    VALUE exc…