/trunk/libs/libflac/flac-1.3.2/src/share/grabbag/file.c
C | 193 lines | 139 code | 18 blank | 36 comment | 46 complexity | 4c1059f8dcf651d64229df228e2cbaac MD5 | raw file
- /* grabbag - Convenience lib for various routines common to several tools
- * Copyright (C) 2002-2009 Josh Coalson
- * Copyright (C) 2011-2016 Xiph.Org Foundation
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #ifdef HAVE_CONFIG_H
- # include <config.h>
- #endif
- #if defined _MSC_VER || defined __MINGW32__
- #include <sys/utime.h> /* for utime() */
- #include <io.h> /* for chmod(), _setmode(), unlink() */
- #include <fcntl.h> /* for _O_BINARY */
- #else
- #include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
- #include <utime.h> /* for utime() */
- #endif
- #if defined __CYGWIN__ || defined __EMX__
- #include <io.h> /* for setmode(), O_BINARY */
- #include <fcntl.h> /* for _O_BINARY */
- #endif
- #include <sys/stat.h> /* for stat(), maybe chmod() */
- #if defined _WIN32 && !defined __CYGWIN__
- #else
- #include <unistd.h> /* for unlink() */
- #endif
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h> /* for strrchr() */
- #if defined _WIN32 && !defined __CYGWIN__
- // for GetFileInformationByHandle() etc
- #include <windows.h>
- #include <winbase.h>
- #endif
- #include "share/grabbag.h"
- void grabbag__file_copy_metadata(const char *srcpath, const char *destpath)
- {
- struct flac_stat_s srcstat;
- struct utimbuf srctime;
- if(0 == flac_stat(srcpath, &srcstat)) {
- srctime.actime = srcstat.st_atime;
- srctime.modtime = srcstat.st_mtime;
- (void)flac_chmod(destpath, srcstat.st_mode);
- (void)flac_utime(destpath, &srctime);
- }
- }
- FLAC__off_t grabbag__file_get_filesize(const char *srcpath)
- {
- struct flac_stat_s srcstat;
- if(0 == flac_stat(srcpath, &srcstat))
- return srcstat.st_size;
- else
- return -1;
- }
- const char *grabbag__file_get_basename(const char *srcpath)
- {
- const char *p;
- p = strrchr(srcpath, '/');
- if(0 == p) {
- p = strrchr(srcpath, '\\');
- if(0 == p)
- return srcpath;
- }
- return ++p;
- }
- FLAC__bool grabbag__file_change_stats(const char *filename, FLAC__bool read_only)
- {
- struct flac_stat_s stats;
- if(0 == flac_stat(filename, &stats)) {
- #if !defined _MSC_VER && !defined __MINGW32__
- if(read_only) {
- stats.st_mode &= ~S_IWUSR;
- stats.st_mode &= ~S_IWGRP;
- stats.st_mode &= ~S_IWOTH;
- }
- else {
- stats.st_mode |= S_IWUSR;
- }
- #else
- if(read_only)
- stats.st_mode &= ~S_IWRITE;
- else
- stats.st_mode |= S_IWRITE;
- #endif
- if(0 != flac_chmod(filename, stats.st_mode))
- return false;
- }
- else
- return false;
- return true;
- }
- FLAC__bool grabbag__file_are_same(const char *f1, const char *f2)
- {
- #if defined _MSC_VER || defined __MINGW32__
- /* see
- * http://www.hydrogenaudio.org/forums/index.php?showtopic=49439&pid=444300&st=0
- * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/getfileinformationbyhandle.asp
- * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/by_handle_file_information_str.asp
- * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/createfile.asp
- * apparently both the files have to be open at the same time for the comparison to work
- */
- FLAC__bool same = false;
- BY_HANDLE_FILE_INFORMATION info1, info2;
- HANDLE h1, h2;
- BOOL ok = 1;
- h1 = CreateFile_utf8(f1, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- h2 = CreateFile_utf8(f2, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
- if(h1 == INVALID_HANDLE_VALUE || h2 == INVALID_HANDLE_VALUE)
- ok = 0;
- ok &= GetFileInformationByHandle(h1, &info1);
- ok &= GetFileInformationByHandle(h2, &info2);
- if(ok)
- same =
- info1.dwVolumeSerialNumber == info2.dwVolumeSerialNumber &&
- info1.nFileIndexHigh == info2.nFileIndexHigh &&
- info1.nFileIndexLow == info2.nFileIndexLow
- ;
- if(h1 != INVALID_HANDLE_VALUE)
- CloseHandle(h1);
- if(h2 != INVALID_HANDLE_VALUE)
- CloseHandle(h2);
- return same;
- #else
- struct flac_stat_s s1, s2;
- return f1 && f2 && flac_stat(f1, &s1) == 0 && flac_stat(f2, &s2) == 0 && s1.st_ino == s2.st_ino && s1.st_dev == s2.st_dev;
- #endif
- }
- FLAC__bool grabbag__file_remove_file(const char *filename)
- {
- return grabbag__file_change_stats(filename, /*read_only=*/false) && 0 == flac_unlink(filename);
- }
- FILE *grabbag__file_get_binary_stdin(void)
- {
- /* if something breaks here it is probably due to the presence or
- * absence of an underscore before the identifiers 'setmode',
- * 'fileno', and/or 'O_BINARY'; check your system header files.
- */
- #if defined _MSC_VER || defined __MINGW32__
- _setmode(_fileno(stdin), _O_BINARY);
- #elif defined __CYGWIN__
- /* almost certainly not needed for any modern Cygwin, but let's be safe... */
- setmode(_fileno(stdin), _O_BINARY);
- #elif defined __EMX__
- setmode(fileno(stdin), O_BINARY);
- #endif
- return stdin;
- }
- FILE *grabbag__file_get_binary_stdout(void)
- {
- /* if something breaks here it is probably due to the presence or
- * absence of an underscore before the identifiers 'setmode',
- * 'fileno', and/or 'O_BINARY'; check your system header files.
- */
- #if defined _MSC_VER || defined __MINGW32__
- _setmode(_fileno(stdout), _O_BINARY);
- #elif defined __CYGWIN__
- /* almost certainly not needed for any modern Cygwin, but let's be safe... */
- setmode(_fileno(stdout), _O_BINARY);
- #elif defined __EMX__
- setmode(fileno(stdout), O_BINARY);
- #endif
- return stdout;
- }