diff options
Diffstat (limited to 'libs/libsndfile/src/file_io.c')
| -rw-r--r-- | libs/libsndfile/src/file_io.c | 1537 |
1 files changed, 1537 insertions, 0 deletions
diff --git a/libs/libsndfile/src/file_io.c b/libs/libsndfile/src/file_io.c new file mode 100644 index 0000000000..d80e17d307 --- /dev/null +++ b/libs/libsndfile/src/file_io.c @@ -0,0 +1,1537 @@ +/* +** Copyright (C) 2002-2005 Erik de Castro Lopo <erikd@mega-nerd.com> +** Copyright (C) 2003 Ross Bencina <rbencina@iprimus.com.au> +** +** This program 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 program 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 program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +/* +** The file is split into three sections as follows: +** - The top section (USE_WINDOWS_API == 0) for Linux, Unix and MacOSX +** systems (including Cygwin). +** - The middle section (USE_WINDOWS_API == 1) for microsoft windows +** (including MinGW) using the native windows API. +** - A legacy windows section which attempted to work around grevious +** bugs in microsoft's POSIX implementation. +*/ + +/* +** The header file sfconfig.h MUST be included before the others to ensure +** that large file support is enabled correctly on Unix systems. +*/ + +#include "sfconfig.h" + +#include <stdio.h> +#include <stdlib.h> + +#if HAVE_UNISTD_H +#include <unistd.h> +#endif + +#if (HAVE_DECL_S_IRGRP == 0) +#include <sf_unistd.h> +#endif + +#include <string.h> +#include <fcntl.h> +#include <errno.h> +#include <sys/stat.h> + +#include "sndfile.h" +#include "common.h" + +#define SENSIBLE_SIZE (0x40000000) + +static void psf_log_syserr (SF_PRIVATE *psf, int error) ; + +#if (USE_WINDOWS_API == 0) + +/*------------------------------------------------------------------------------ +** Win32 stuff at the bottom of the file. Unix and other sensible OSes here. +*/ + +static int psf_close_fd (int fd) ; +static int psf_open_fd (const char * path, int mode) ; +static sf_count_t psf_get_filelen_fd (int fd) ; + +int +psf_fopen (SF_PRIVATE *psf, const char *pathname, int open_mode) +{ + psf->error = 0 ; + psf->filedes = psf_open_fd (pathname, open_mode) ; + + if (psf->filedes == - SFE_BAD_OPEN_MODE) + { psf->error = SFE_BAD_OPEN_MODE ; + psf->filedes = -1 ; + return psf->error ; + } ; + + if (psf->filedes == -1) + psf_log_syserr (psf, errno) ; + + psf->mode = open_mode ; + + return psf->error ; +} /* psf_fopen */ + +int +psf_fclose (SF_PRIVATE *psf) +{ int retval ; + + if (psf->virtual_io) + return 0 ; + + if (psf->do_not_close_descriptor) + { psf->filedes = -1 ; + return 0 ; + } ; + + if ((retval = psf_close_fd (psf->filedes)) == -1) + psf_log_syserr (psf, errno) ; + + psf->filedes = -1 ; + + return retval ; +} /* psf_fclose */ + +int +psf_open_rsrc (SF_PRIVATE *psf, int open_mode) +{ + if (psf->rsrcdes > 0) + return 0 ; + + /* Test for MacOSX style resource fork on HPFS or HPFS+ filesystems. */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s/rsrc", psf->filepath) ; + psf->error = SFE_NO_ERROR ; + if ((psf->rsrcdes = psf_open_fd (psf->rsrcpath, open_mode)) >= 0) + { psf->rsrclength = psf_get_filelen_fd (psf->rsrcdes) ; + if (psf->rsrclength > 0 || (open_mode & SFM_WRITE)) + return SFE_NO_ERROR ; + psf_close_fd (psf->rsrcdes) ; + psf->rsrcdes = -1 ; + } ; + + if (psf->rsrcdes == - SFE_BAD_OPEN_MODE) + { psf->error = SFE_BAD_OPEN_MODE ; + return psf->error ; + } ; + + /* + ** Now try for a resource fork stored as a separate file in the same + ** directory, but preceded with a dot underscore. + */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s._%s", psf->directory, psf->filename) ; + psf->error = SFE_NO_ERROR ; + if ((psf->rsrcdes = psf_open_fd (psf->rsrcpath, open_mode)) >= 0) + { psf->rsrclength = psf_get_filelen_fd (psf->rsrcdes) ; + return SFE_NO_ERROR ; + } ; + + /* + ** Now try for a resource fork stored in a separate file in the + ** .AppleDouble/ directory. + */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s.AppleDouble/%s", psf->directory, psf->filename) ; + psf->error = SFE_NO_ERROR ; + if ((psf->rsrcdes = psf_open_fd (psf->rsrcpath, open_mode)) >= 0) + { psf->rsrclength = psf_get_filelen_fd (psf->rsrcdes) ; + return SFE_NO_ERROR ; + } ; + + /* No resource file found. */ + if (psf->rsrcdes == -1) + psf_log_syserr (psf, errno) ; + + psf->rsrcdes = -1 ; + + return psf->error ; +} /* psf_open_rsrc */ + +sf_count_t +psf_get_filelen (SF_PRIVATE *psf) +{ sf_count_t filelen ; + + if (psf->virtual_io) + return psf->vio.get_filelen (psf->vio_user_data) ; + + filelen = psf_get_filelen_fd (psf->filedes) ; + + if (filelen == -1) + { psf_log_syserr (psf, errno) ; + return (sf_count_t) -1 ; + } ; + + if (filelen == -SFE_BAD_STAT_SIZE) + { psf->error = SFE_BAD_STAT_SIZE ; + return (sf_count_t) -1 ; + } ; + + switch (psf->mode) + { case SFM_WRITE : + filelen = filelen - psf->fileoffset ; + break ; + + case SFM_READ : + if (psf->fileoffset > 0 && psf->filelength > 0) + filelen = psf->filelength ; + break ; + + case SFM_RDWR : + /* + ** Cannot open embedded files SFM_RDWR so we don't need to + ** subtract psf->fileoffset. We already have the answer we + ** need. + */ + break ; + + default : + /* Shouldn't be here, so return error. */ + filelen = -1 ; + } ; + + return filelen ; +} /* psf_get_filelen */ + +int +psf_close_rsrc (SF_PRIVATE *psf) +{ + if (psf->rsrcdes >= 0) + psf_close_fd (psf->rsrcdes) ; + psf->rsrcdes = -1 ; + return 0 ; +} /* psf_close_rsrc */ + +int +psf_set_stdio (SF_PRIVATE *psf, int mode) +{ int error = 0 ; + + switch (mode) + { case SFM_RDWR : + error = SFE_OPEN_PIPE_RDWR ; + break ; + + case SFM_READ : + psf->filedes = 0 ; + break ; + + case SFM_WRITE : + psf->filedes = 1 ; + break ; + + default : + error = SFE_BAD_OPEN_MODE ; + break ; + } ; + psf->filelength = 0 ; + + return error ; +} /* psf_set_stdio */ + +void +psf_set_file (SF_PRIVATE *psf, int fd) +{ psf->filedes = fd ; +} /* psf_set_file */ + +int +psf_file_valid (SF_PRIVATE *psf) +{ return (psf->filedes >= 0) ? SF_TRUE : SF_FALSE ; +} /* psf_set_file */ + +sf_count_t +psf_fseek (SF_PRIVATE *psf, sf_count_t offset, int whence) +{ sf_count_t new_position ; + + if (psf->virtual_io) + return psf->vio.seek (offset, whence, psf->vio_user_data) ; + + switch (whence) + { case SEEK_SET : + offset += psf->fileoffset ; + break ; + + case SEEK_END : + if (psf->mode == SFM_WRITE) + { new_position = lseek (psf->filedes, offset, whence) ; + + if (new_position < 0) + psf_log_syserr (psf, errno) ; + + return new_position - psf->fileoffset ; + } ; + + /* Transform SEEK_END into a SEEK_SET, ie find the file + ** length add the requested offset (should be <= 0) to + ** get the offset wrt the start of file. + */ + whence = SEEK_SET ; + offset = lseek (psf->filedes, 0, SEEK_END) + offset ; + break ; + + default : + /* No need to do anything about SEEK_CUR. */ + break ; + } ; + + new_position = lseek (psf->filedes, offset, whence) ; + + if (new_position < 0) + psf_log_syserr (psf, errno) ; + + new_position -= psf->fileoffset ; + + return new_position ; +} /* psf_fseek */ + +sf_count_t +psf_fread (void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + + if (psf->virtual_io) + return psf->vio.read (ptr, bytes*items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the read down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : (ssize_t) items ; + + count = read (psf->filedes, ((char*) ptr) + total, (size_t) count) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + if (psf->is_pipe) + psf->pipeoffset += total ; + + return total / bytes ; +} /* psf_fread */ + +sf_count_t +psf_fwrite (const void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + + if (psf->virtual_io) + return psf->vio.write (ptr, bytes*items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the writes down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : items ; + + count = write (psf->filedes, ((const char*) ptr) + total, count) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + if (psf->is_pipe) + psf->pipeoffset += total ; + + return total / bytes ; +} /* psf_fwrite */ + +sf_count_t +psf_ftell (SF_PRIVATE *psf) +{ sf_count_t pos ; + + if (psf->virtual_io) + return psf->vio.tell (psf->vio_user_data) ; + + if (psf->is_pipe) + return psf->pipeoffset ; + + pos = lseek (psf->filedes, 0, SEEK_CUR) ; + + if (pos == ((sf_count_t) -1)) + { psf_log_syserr (psf, errno) ; + return -1 ; + } ; + + return pos - psf->fileoffset ; +} /* psf_ftell */ + +static int +psf_close_fd (int fd) +{ int retval ; + + while ((retval = close (fd)) == -1 && errno == EINTR) + /* Do nothing. */ ; + + return retval ; +} /* psf_close_fd */ + +sf_count_t +psf_fgets (char *buffer, sf_count_t bufsize, SF_PRIVATE *psf) +{ sf_count_t k = 0 ; + sf_count_t count ; + + while (k < bufsize - 1) + { count = read (psf->filedes, &(buffer [k]), 1) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0 || buffer [k++] == '\n') + break ; + } ; + + buffer [k] = 0 ; + + return k ; +} /* psf_fgets */ + +int +psf_is_pipe (SF_PRIVATE *psf) +{ struct stat statbuf ; + + if (psf->virtual_io) + return SF_FALSE ; + + if (fstat (psf->filedes, &statbuf) == -1) + { psf_log_syserr (psf, errno) ; + /* Default to maximum safety. */ + return SF_TRUE ; + } ; + + if (S_ISFIFO (statbuf.st_mode) || S_ISSOCK (statbuf.st_mode)) + return SF_TRUE ; + + return SF_FALSE ; +} /* psf_is_pipe */ + +static sf_count_t +psf_get_filelen_fd (int fd) +{ struct stat statbuf ; + + /* + ** Sanity check. + ** If everything is OK, this will be optimised out. + */ + if (sizeof (statbuf.st_size) == 4 && sizeof (sf_count_t) == 8) + return (sf_count_t) -SFE_BAD_STAT_SIZE ; + + if (fstat (fd, &statbuf) == -1) + return (sf_count_t) -1 ; + + return statbuf.st_size ; +} /* psf_get_filelen_fd */ + +int +psf_ftruncate (SF_PRIVATE *psf, sf_count_t len) +{ int retval ; + + /* Returns 0 on success, non-zero on failure. */ + if (len < 0) + return -1 ; + + if ((sizeof (off_t) < sizeof (sf_count_t)) && len > 0x7FFFFFFF) + return -1 ; + + retval = ftruncate (psf->filedes, len) ; + + if (retval == -1) + psf_log_syserr (psf, errno) ; + + return retval ; +} /* psf_ftruncate */ + +void +psf_init_files (SF_PRIVATE *psf) +{ psf->filedes = -1 ; + psf->rsrcdes = -1 ; + psf->savedes = -1 ; +} /* psf_init_files */ + +void +psf_use_rsrc (SF_PRIVATE *psf, int on_off) +{ + if (on_off) + { if (psf->filedes != psf->rsrcdes) + { psf->savedes = psf->filedes ; + psf->filedes = psf->rsrcdes ; + } ; + } + else if (psf->filedes == psf->rsrcdes) + psf->filedes = psf->savedes ; + + return ; +} /* psf_use_rsrc */ + +static int +psf_open_fd (const char * pathname, int open_mode) +{ int fd, oflag, mode ; + + /* + ** Sanity check. If everything is OK, this test and the printfs will + ** be optimised out. This is meant to catch the problems caused by + ** "sfconfig.h" being included after <stdio.h>. + */ + if (sizeof (off_t) != sizeof (sf_count_t)) + { puts ("\n\n*** Fatal error : sizeof (off_t) != sizeof (sf_count_t)") ; + puts ("*** This means that libsndfile was not configured correctly.\n") ; + exit (1) ; + } ; + + switch (open_mode) + { case SFM_READ : + oflag = O_RDONLY ; + mode = 0 ; + break ; + + case SFM_WRITE : + oflag = O_WRONLY | O_CREAT | O_TRUNC ; + mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH ; + break ; + + case SFM_RDWR : + oflag = O_RDWR | O_CREAT ; + mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH ; + break ; + + default : + return - SFE_BAD_OPEN_MODE ; + break ; + } ; + +#if OS_IS_WIN32 + /* For Cygwin. */ + oflag |= O_BINARY ; +#endif + + if (mode == 0) + fd = open (pathname, oflag) ; + else + fd = open (pathname, oflag, mode) ; + + return fd ; +} /* psf_open_fd */ + +static void +psf_log_syserr (SF_PRIVATE *psf, int error) +{ + /* Only log an error if no error has been set yet. */ + if (psf->error == 0) + { psf->error = SFE_SYSTEM ; + LSF_SNPRINTF (psf->syserr, sizeof (psf->syserr), "System error : %s.", strerror (error)) ; + } ; + + return ; +} /* psf_log_syserr */ + +void +psf_fsync (SF_PRIVATE *psf) +{ +#if HAVE_FSYNC + if (psf->mode == SFM_WRITE || psf->mode == SFM_RDWR) + fsync (psf->filedes) ; +#else + psf = NULL ; +#endif +} /* psf_fsync */ + +#elif USE_WINDOWS_API + +/* Win32 file i/o functions implemented using native Win32 API */ + +#include <windows.h> +#include <io.h> + +#ifndef HAVE_SSIZE_T +typedef long ssize_t ; +#endif + +static int psf_close_handle (HANDLE handle) ; +static HANDLE psf_open_handle (const char * path, int mode) ; +static sf_count_t psf_get_filelen_handle (HANDLE handle) ; + +/* USE_WINDOWS_API */ int +psf_fopen (SF_PRIVATE *psf, const char *pathname, int open_mode) +{ + psf->error = 0 ; + psf->hfile = psf_open_handle (pathname, open_mode) ; + + if (psf->hfile == NULL) + psf_log_syserr (psf, errno) ; + + psf->mode = open_mode ; + + return psf->error ; +} /* psf_fopen */ + +/* USE_WINDOWS_API */ int +psf_fclose (SF_PRIVATE *psf) +{ int retval ; + + if (psf->virtual_io) + return 0 ; + + if (psf->do_not_close_descriptor) + { psf->hfile = NULL ; + return 0 ; + } ; + + if ((retval = psf_close_handle (psf->hfile)) == -1) + psf_log_syserr (psf, errno) ; + + psf->hfile = NULL ; + + return retval ; +} /* psf_fclose */ + +/* USE_WINDOWS_API */ int +psf_open_rsrc (SF_PRIVATE *psf, int open_mode) +{ + if (psf->hrsrc != NULL) + return 0 ; + + /* Test for MacOSX style resource fork on HPFS or HPFS+ filesystems. */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s/rsrc", psf->filepath) ; + psf->error = SFE_NO_ERROR ; + if ((psf->hrsrc = psf_open_handle (psf->rsrcpath, open_mode)) != NULL) + { psf->rsrclength = psf_get_filelen_handle (psf->hrsrc) ; + return SFE_NO_ERROR ; + } ; + + /* + ** Now try for a resource fork stored as a separate file in the same + ** directory, but preceded with a dot underscore. + */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s._%s", psf->directory, psf->filename) ; + psf->error = SFE_NO_ERROR ; + if ((psf->hrsrc = psf_open_handle (psf->rsrcpath, open_mode)) != NULL) + { psf->rsrclength = psf_get_filelen_handle (psf->hrsrc) ; + return SFE_NO_ERROR ; + } ; + + /* + ** Now try for a resource fork stored in a separate file in the + ** .AppleDouble/ directory. + */ + LSF_SNPRINTF (psf->rsrcpath, sizeof (psf->rsrcpath), "%s.AppleDouble/%s", psf->directory, psf->filename) ; + psf->error = SFE_NO_ERROR ; + if ((psf->hrsrc = psf_open_handle (psf->rsrcpath, open_mode)) != NULL) + { psf->rsrclength = psf_get_filelen_handle (psf->hrsrc) ; + return SFE_NO_ERROR ; + } ; + + /* No resource file found. */ + if (psf->hrsrc == NULL) + psf_log_syserr (psf, errno) ; + + psf->hrsrc = NULL ; + + return psf->error ; +} /* psf_open_rsrc */ + +/* USE_WINDOWS_API */ sf_count_t +psf_get_filelen (SF_PRIVATE *psf) +{ sf_count_t filelen ; + + if (psf->virtual_io) + return psf->vio.get_filelen (psf->vio_user_data) ; + + filelen = psf_get_filelen_handle (psf->hfile) ; + + if (filelen == -1) + { psf_log_syserr (psf, errno) ; + return (sf_count_t) -1 ; + } ; + + if (filelen == -SFE_BAD_STAT_SIZE) + { psf->error = SFE_BAD_STAT_SIZE ; + return (sf_count_t) -1 ; + } ; + + switch (psf->mode) + { case SFM_WRITE : + filelen = filelen - psf->fileoffset ; + break ; + + case SFM_READ : + if (psf->fileoffset > 0 && psf->filelength > 0) + filelen = psf->filelength ; + break ; + + case SFM_RDWR : + /* + ** Cannot open embedded files SFM_RDWR so we don't need to + ** subtract psf->fileoffset. We already have the answer we + ** need. + */ + break ; + + default : + /* Shouldn't be here, so return error. */ + filelen = -1 ; + } ; + + return filelen ; +} /* psf_get_filelen */ + +/* USE_WINDOWS_API */ void +psf_init_files (SF_PRIVATE *psf) +{ psf->hfile = NULL ; + psf->hrsrc = NULL ; + psf->hsaved = NULL ; +} /* psf_init_files */ + +/* USE_WINDOWS_API */ void +psf_use_rsrc (SF_PRIVATE *psf, int on_off) +{ + if (on_off) + { if (psf->hfile != psf->hrsrc) + { psf->hsaved = psf->hfile ; + psf->hfile = psf->hrsrc ; + } ; + } + else if (psf->hfile == psf->hrsrc) + psf->hfile = psf->hsaved ; + + return ; +} /* psf_use_rsrc */ + +/* USE_WINDOWS_API */ static HANDLE +psf_open_handle (const char * pathname, int open_mode) +{ DWORD dwDesiredAccess ; + DWORD dwShareMode ; + DWORD dwCreationDistribution ; + HANDLE handle ; + + switch (open_mode) + { case SFM_READ : + dwDesiredAccess = GENERIC_READ ; + dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE ; + dwCreationDistribution = OPEN_EXISTING ; + break ; + + case SFM_WRITE : + dwDesiredAccess = GENERIC_WRITE ; + dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE ; + dwCreationDistribution = CREATE_ALWAYS ; + break ; + + case SFM_RDWR : + dwDesiredAccess = GENERIC_READ | GENERIC_WRITE ; + dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE ; + dwCreationDistribution = OPEN_ALWAYS ; + break ; + + default : + return NULL ; + } ; + + handle = CreateFile ( + pathname, /* pointer to name of the file */ + dwDesiredAccess, /* access (read-write) mode */ + dwShareMode, /* share mode */ + 0, /* pointer to security attributes */ + dwCreationDistribution, /* how to create */ + FILE_ATTRIBUTE_NORMAL, /* file attributes (could use FILE_FLAG_SEQUENTIAL_SCAN) */ + NULL /* handle to file with attributes to copy */ + ) ; + + if (handle == INVALID_HANDLE_VALUE) + return NULL ; + + return handle ; +} /* psf_open_handle */ + +/* USE_WINDOWS_API */ static void +psf_log_syserr (SF_PRIVATE *psf, int error) +{ LPVOID lpMsgBuf ; + + /* Only log an error if no error has been set yet. */ + if (psf->error == 0) + { psf->error = SFE_SYSTEM ; + + FormatMessage ( + FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, + NULL, + error, + MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), + (LPTSTR) &lpMsgBuf, + 0, + NULL + ) ; + + LSF_SNPRINTF (psf->syserr, sizeof (psf->syserr), "System error : %s", lpMsgBuf) ; + LocalFree (lpMsgBuf) ; + } ; + + return ; +} /* psf_log_syserr */ + + +/* USE_WINDOWS_API */ int +psf_close_rsrc (SF_PRIVATE *psf) +{ + if (psf->hrsrc != NULL) + psf_close_handle (psf->hrsrc) ; + psf->hrsrc = NULL ; + return 0 ; +} /* psf_close_rsrc */ + + +/* USE_WINDOWS_API */ int +psf_set_stdio (SF_PRIVATE *psf, int mode) +{ HANDLE handle = NULL ; + int error = 0 ; + + switch (mode) + { case SFM_RDWR : + error = SFE_OPEN_PIPE_RDWR ; + break ; + + case SFM_READ : + handle = GetStdHandle (STD_INPUT_HANDLE) ; + psf->do_not_close_descriptor = 1 ; + break ; + + case SFM_WRITE : + handle = GetStdHandle (STD_OUTPUT_HANDLE) ; + psf->do_not_close_descriptor = 1 ; + break ; + + default : + error = SFE_BAD_OPEN_MODE ; + break ; + } ; + + psf->hfile = handle ; + psf->filelength = 0 ; + + return error ; +} /* psf_set_stdio */ + +/* USE_WINDOWS_API */ void +psf_set_file (SF_PRIVATE *psf, int fd) +{ HANDLE handle ; + long osfhandle ; + + osfhandle = _get_osfhandle (fd) ; + handle = (HANDLE) osfhandle ; + + psf->hfile = handle ; +} /* psf_set_file */ + +/* USE_WINDOWS_API */ int +psf_file_valid (SF_PRIVATE *psf) +{ if (psf->hfile == NULL) + return SF_FALSE ; + if (psf->hfile == INVALID_HANDLE_VALUE) + return SF_FALSE ; + return SF_TRUE ; +} /* psf_set_file */ + +/* USE_WINDOWS_API */ sf_count_t +psf_fseek (SF_PRIVATE *psf, sf_count_t offset, int whence) +{ sf_count_t new_position ; + LONG lDistanceToMove, lDistanceToMoveHigh ; + DWORD dwMoveMethod ; + DWORD dwResult, dwError ; + + if (psf->virtual_io) + return psf->vio.seek (offset, whence, psf->vio_user_data) ; + + switch (whence) + { case SEEK_SET : + offset += psf->fileoffset ; + dwMoveMethod = FILE_BEGIN ; + break ; + + case SEEK_END : + dwMoveMethod = FILE_END ; + break ; + + default : + dwMoveMethod = FILE_CURRENT ; + break ; + } ; + + lDistanceToMove = (DWORD) (offset & 0xFFFFFFFF) ; + lDistanceToMoveHigh = (DWORD) ((offset >> 32) & 0xFFFFFFFF) ; + + dwResult = SetFilePointer (psf->hfile, lDistanceToMove, &lDistanceToMoveHigh, dwMoveMethod) ; + + if (dwResult == 0xFFFFFFFF) + dwError = GetLastError () ; + else + dwError = NO_ERROR ; + + if (dwError != NO_ERROR) + { psf_log_syserr (psf, dwError) ; + return -1 ; + } ; + + new_position = (dwResult + ((__int64) lDistanceToMoveHigh << 32)) - psf->fileoffset ; + + return new_position ; +} /* psf_fseek */ + +/* USE_WINDOWS_API */ sf_count_t +psf_fread (void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + DWORD dwNumberOfBytesRead ; + + if (psf->virtual_io) + return psf->vio.read (ptr, bytes*items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the writes down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : (ssize_t) items ; + + if (ReadFile (psf->hfile, ((char*) ptr) + total, count, &dwNumberOfBytesRead, 0) == 0) + { psf_log_syserr (psf, GetLastError ()) ; + break ; + } + else + count = dwNumberOfBytesRead ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + if (psf->is_pipe) + psf->pipeoffset += total ; + + return total / bytes ; +} /* psf_fread */ + +/* USE_WINDOWS_API */ sf_count_t +psf_fwrite (const void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + DWORD dwNumberOfBytesWritten ; + + if (psf->virtual_io) + return psf->vio.write (ptr, bytes * items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the writes down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : (ssize_t) items ; + + if (WriteFile (psf->hfile, ((const char*) ptr) + total, count, &dwNumberOfBytesWritten, 0) == 0) + { psf_log_syserr (psf, GetLastError ()) ; + break ; + } + else + count = dwNumberOfBytesWritten ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + if (psf->is_pipe) + psf->pipeoffset += total ; + + return total / bytes ; +} /* psf_fwrite */ + +/* USE_WINDOWS_API */ sf_count_t +psf_ftell (SF_PRIVATE *psf) +{ sf_count_t pos ; + LONG lDistanceToMoveLow, lDistanceToMoveHigh ; + DWORD dwResult, dwError ; + + if (psf->virtual_io) + return psf->vio.tell (psf->vio_user_data) ; + + if (psf->is_pipe) + return psf->pipeoffset ; + + lDistanceToMoveLow = 0 ; + lDistanceToMoveHigh = 0 ; + + dwResult = SetFilePointer (psf->hfile, lDistanceToMoveLow, &lDistanceToMoveHigh, FILE_CURRENT) ; + + if (dwResult == 0xFFFFFFFF) + dwError = GetLastError () ; + else + dwError = NO_ERROR ; + + if (dwError != NO_ERROR) + { psf_log_syserr (psf, dwError) ; + return -1 ; + } ; + + pos = (dwResult + ((__int64) lDistanceToMoveHigh << 32)) ; + + return pos - psf->fileoffset ; +} /* psf_ftell */ + +/* USE_WINDOWS_API */ static int +psf_close_handle (HANDLE handle) +{ if (CloseHandle (handle) == 0) + return -1 ; + + return 0 ; +} /* psf_close_handle */ + +/* USE_WINDOWS_API */ sf_count_t +psf_fgets (char *buffer, sf_count_t bufsize, SF_PRIVATE *psf) +{ sf_count_t k = 0 ; + sf_count_t count ; + DWORD dwNumberOfBytesRead ; + + while (k < bufsize - 1) + { if (ReadFile (psf->hfile, &(buffer [k]), 1, &dwNumberOfBytesRead, 0) == 0) + { psf_log_syserr (psf, GetLastError ()) ; + break ; + } + else + { count = dwNumberOfBytesRead ; + /* note that we only check for '\n' not other line endings such as CRLF */ + if (count == 0 || buffer [k++] == '\n') + break ; + } ; + } ; + + buffer [k] = 0 ; + + return k ; +} /* psf_fgets */ + +/* USE_WINDOWS_API */ int +psf_is_pipe (SF_PRIVATE *psf) +{ + if (psf->virtual_io) + return SF_FALSE ; + + if (GetFileType (psf->hfile) == FILE_TYPE_DISK) + return SF_FALSE ; + + /* Default to maximum safety. */ + return SF_TRUE ; +} /* psf_is_pipe */ + +/* USE_WINDOWS_API */ sf_count_t +psf_get_filelen_handle (HANDLE handle) +{ sf_count_t filelen ; + DWORD dwFileSizeLow, dwFileSizeHigh, dwError = NO_ERROR ; + + dwFileSizeLow = GetFileSize (handle, &dwFileSizeHigh) ; + + if (dwFileSizeLow == 0xFFFFFFFF) + dwError = GetLastError () ; + + if (dwError != NO_ERROR) + return (sf_count_t) -1 ; + + filelen = dwFileSizeLow + ((__int64) dwFileSizeHigh << 32) ; + + return filelen ; +} /* psf_get_filelen_handle */ + +/* USE_WINDOWS_API */ void +psf_fsync (SF_PRIVATE *psf) +{ FlushFileBuffers (psf->hfile) ; +} /* psf_fsync */ + + +/* USE_WINDOWS_API */ int +psf_ftruncate (SF_PRIVATE *psf, sf_count_t len) +{ int retval = 0 ; + LONG lDistanceToMoveLow, lDistanceToMoveHigh ; + DWORD dwResult, dwError = NO_ERROR ; + + /* This implementation trashes the current file position. + ** should it save and restore it? what if the current position is past + ** the new end of file? + */ + + /* Returns 0 on success, non-zero on failure. */ + if (len < 0) + return 1 ; + + lDistanceToMoveLow = (DWORD) (len & 0xFFFFFFFF) ; + lDistanceToMoveHigh = (DWORD) ((len >> 32) & 0xFFFFFFFF) ; + + dwResult = SetFilePointer (psf->hfile, lDistanceToMoveLow, &lDistanceToMoveHigh, FILE_BEGIN) ; + + if (dwResult == 0xFFFFFFFF) + dwError = GetLastError () ; + + if (dwError != NO_ERROR) + { retval = -1 ; + psf_log_syserr (psf, dwError) ; + } + else + { /* Note: when SetEndOfFile is used to extend a file, the contents of the + ** new portion of the file is undefined. This is unlike chsize(), + ** which guarantees that the new portion of the file will be zeroed. + ** Not sure if this is important or not. + */ + if (SetEndOfFile (psf->hfile) == 0) + { retval = -1 ; + psf_log_syserr (psf, GetLastError ()) ; + } ; + } ; + + return retval ; +} /* psf_ftruncate */ + + +#else +/* Win32 file i/o functions implemented using Unix-style file i/o API */ + +/* Win32 has a 64 file offset seek function: +** +** __int64 _lseeki64 (int handle, __int64 offset, int origin) ; +** +** It also has a 64 bit fstat function: +** +** int fstati64 (int, struct _stati64) ; +** +** but the fscking thing doesn't work!!!!! The file size parameter returned +** by this function is only valid up until more data is written at the end of +** the file. That makes this function completely 100% useless. +*/ + +#include <io.h> +#include <direct.h> + +#ifndef HAVE_SSIZE_T +typedef long ssize_t ; +#endif + +/* Win32 */ int +psf_fopen (SF_PRIVATE *psf, const char *pathname, int open_mode) +{ int oflag, mode ; + + switch (open_mode) + { case SFM_READ : + oflag = O_RDONLY | O_BINARY ; + mode = 0 ; + break ; + + case SFM_WRITE : + oflag = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY ; + mode = S_IRUSR | S_IWUSR | S_IRGRP ; + break ; + + case SFM_RDWR : + oflag = O_RDWR | O_CREAT | O_BINARY ; + mode = S_IRUSR | S_IWUSR | S_IRGRP ; + break ; + + default : + psf->error = SFE_BAD_OPEN_MODE ; + return -1 ; + break ; + } ; + + if (mode == 0) + psf->filedes = open (pathname, oflag) ; + else + psf->filedes = open (pathname, oflag, mode) ; + + if (psf->filedes == -1) + psf_log_syserr (psf, errno) ; + + return psf->filedes ; +} /* psf_fopen */ + +/* Win32 */ sf_count_t +psf_fseek (SF_PRIVATE *psf, sf_count_t offset, int whence) +{ sf_count_t new_position ; + + if (psf->virtual_io) + return psf->vio.seek (offset, whence, psf->vio_user_data) ; + + switch (whence) + { case SEEK_SET : + offset += psf->fileoffset ; + break ; + + case SEEK_END : + if (psf->mode == SFM_WRITE) + { new_position = _lseeki64 (psf->filedes, offset, whence) ; + + if (new_position < 0) + psf_log_syserr (psf, errno) ; + + return new_position - psf->fileoffset ; + } ; + + /* Transform SEEK_END into a SEEK_SET, ie find the file + ** length add the requested offset (should be <= 0) to + ** get the offset wrt the start of file. + */ + whence = SEEK_SET ; + offset = _lseeki64 (psf->filedes, 0, SEEK_END) + offset ; + break ; + + default : + /* No need to do anything about SEEK_CUR. */ + break ; + } ; + + /* + ** Bypass weird Win32-ism if necessary. + ** _lseeki64() returns an "invalid parameter" error if called with the + ** offset == 0 and whence == SEEK_CUR. + *** Use the _telli64() function instead. + */ + if (offset == 0 && whence == SEEK_CUR) + new_position = _telli64 (psf->filedes) ; + else + new_position = _lseeki64 (psf->filedes, offset, whence) ; + + if (new_position < 0) + psf_log_syserr (psf, errno) ; + + new_position -= psf->fileoffset ; + + return new_position ; +} /* psf_fseek */ + +/* Win32 */ sf_count_t +psf_fread (void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + + if (psf->virtual_io) + return psf->vio.read (ptr, bytes*items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the writes down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : (ssize_t) items ; + + count = read (psf->filedes, ((char*) ptr) + total, (size_t) count) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + return total / bytes ; +} /* psf_fread */ + +/* Win32 */ sf_count_t +psf_fwrite (const void *ptr, sf_count_t bytes, sf_count_t items, SF_PRIVATE *psf) +{ sf_count_t total = 0 ; + ssize_t count ; + + if (psf->virtual_io) + return psf->vio.write (ptr, bytes*items, psf->vio_user_data) / bytes ; + + items *= bytes ; + + /* Do this check after the multiplication above. */ + if (items <= 0) + return 0 ; + + while (items > 0) + { /* Break the writes down to a sensible size. */ + count = (items > SENSIBLE_SIZE) ? SENSIBLE_SIZE : items ; + + count = write (psf->filedes, ((const char*) ptr) + total, count) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0) + break ; + + total += count ; + items -= count ; + } ; + + return total / bytes ; +} /* psf_fwrite */ + +/* Win32 */ sf_count_t +psf_ftell (SF_PRIVATE *psf) +{ sf_count_t pos ; + + if (psf->virtual_io) + return psf->vio.tell (psf->vio_user_data) ; + + pos = _telli64 (psf->filedes) ; + + if (pos == ((sf_count_t) -1)) + { psf_log_syserr (psf, errno) ; + return -1 ; + } ; + + return pos - psf->fileoffset ; +} /* psf_ftell */ + +/* Win32 */ int +psf_fclose (SF_PRIVATE *psf) +{ int retval ; + + while ((retval = close (psf->filedes)) == -1 && errno == EINTR) + /* Do nothing. */ ; + + if (retval == -1) + psf_log_syserr (psf, errno) ; + + psf->filedes = -1 ; + + return retval ; +} /* psf_fclose */ + +/* Win32 */ sf_count_t +psf_fgets (char *buffer, sf_count_t bufsize, SF_PRIVATE *psf) +{ sf_count_t k = 0 ; + sf_count_t count ; + + while (k < bufsize - 1) + { count = read (psf->filedes, &(buffer [k]), 1) ; + + if (count == -1) + { if (errno == EINTR) + continue ; + + psf_log_syserr (psf, errno) ; + break ; + } ; + + if (count == 0 || buffer [k++] == '\n') + break ; + } ; + + buffer [k] = 0 ; + + return k ; +} /* psf_fgets */ + +/* Win32 */ int +psf_is_pipe (SF_PRIVATE *psf) +{ struct stat statbuf ; + + if (psf->virtual_io) + return SF_FALSE ; + + /* Not sure if this works. */ + if (fstat (psf->filedes, &statbuf) == -1) + { psf_log_syserr (psf, errno) ; + /* Default to maximum safety. */ + return SF_TRUE ; + } ; + + /* These macros are defined in Win32/unistd.h. */ + if (S_ISFIFO (statbuf.st_mode) || S_ISSOCK (statbuf.st_mode)) + return SF_TRUE ; + + return SF_FALSE ; +} /* psf_checkpipe */ + +/* Win32 */ sf_count_t +psf_get_filelen (SF_PRIVATE *psf) +{ +#if 0 + /* + ** Windoze is SOOOOO FUCKED!!!!!!! + ** This code should work but doesn't. Why? + ** Code below does work. + */ + struct _stati64 statbuf ; + + if (_fstati64 (psf->filedes, &statbuf)) + { psf_log_syserr (psf, errno) ; + return (sf_count_t) -1 ; + } ; + + return statbuf.st_size ; +#else + sf_count_t current, filelen ; + + if (psf->virtual_io) + return psf->vio.get_filelen (psf->vio_user_data) ; + + if ((current = _telli64 (psf->filedes)) < 0) + { psf_log_syserr (psf, errno) ; + return (sf_count_t) -1 ; + } ; + + /* + ** Lets face it, windoze if FUBAR!!! + ** + ** For some reason, I have to call _lseeki64() TWICE to get to the + ** end of the file. + ** + ** This might have been avoided if windows had implemented the POSIX + ** standard function fsync() but NO, that would have been too easy. + ** + ** I am VERY close to saying that windoze will no longer be supported + ** by libsndfile and changing the license to GPL at the same time. + */ + + _lseeki64 (psf->filedes, 0, SEEK_END) ; + + if ((filelen = _lseeki64 (psf->filedes, 0, SEEK_END)) < 0) + { psf_log_syserr (psf, errno) ; + return (sf_count_t) -1 ; + } ; + + if (filelen > current) + _lseeki64 (psf->filedes, current, SEEK_SET) ; + + switch (psf->mode) + { case SFM_WRITE : + filelen = filelen - psf->fileoffset ; + break ; + + case SFM_READ : + if (psf->fileoffset > 0 && psf->filelength > 0) + filelen = psf->filelength ; + break ; + + case SFM_RDWR : + /* + ** Cannot open embedded files SFM_RDWR so we don't need to + ** subtract psf->fileoffset. We already have the answer we + ** need. + */ + break ; + + default : + filelen = 0 ; + } ; + + return filelen ; +#endif +} /* psf_get_filelen */ + +/* Win32 */ int +psf_ftruncate (SF_PRIVATE *psf, sf_count_t len) +{ int retval ; + + /* Returns 0 on success, non-zero on failure. */ + if (len < 0) + return 1 ; + + /* The global village idiots at micorsoft decided to implement + ** nearly all the required 64 bit file offset functions except + ** for one, truncate. The fscking morons! + ** + ** This is not 64 bit file offset clean. Somone needs to clean + ** this up. + */ + if (len > 0x7FFFFFFF) + return -1 ; + + retval = chsize (psf->filedes, len) ; + + if (retval == -1) + psf_log_syserr (psf, errno) ; + + return retval ; +} /* psf_ftruncate */ + + +static void +psf_log_syserr (SF_PRIVATE *psf, int error) +{ + /* Only log an error if no error has been set yet. */ + if (psf->error == 0) + { psf->error = SFE_SYSTEM ; + LSF_SNPRINTF (psf->syserr, sizeof (psf->syserr), "System error : %s", strerror (error)) ; + } ; + + return ; +} /* psf_log_syserr */ + +#endif + +/* +** Do not edit or modify anything in this comment block. +** The arch-tag line is a file identity tag for the GNU Arch +** revision control system. +** +** arch-tag: 749740d7-ecc7-47bd-8cf7-600f31d32e6d +*/ |