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https://github.com/dolphin-emu/dolphin.git
synced 2025-07-24 14:49:42 -06:00
update zlib to v1.2.8
This commit is contained in:
Tetsuo55
197
Externals/zlib/gzlib.c
vendored
197
Externals/zlib/gzlib.c
vendored
@ -1,19 +1,23 @@
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/* gzlib.c -- zlib functions common to reading and writing gzip files
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* Copyright (C) 2004, 2010 Mark Adler
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* Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#include "gzguts.h"
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#if defined(_WIN32) && !defined(__BORLANDC__)
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# define LSEEK _lseeki64
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#else
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#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
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# define LSEEK lseek64
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#else
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# define LSEEK lseek
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#endif
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#endif
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/* Local functions */
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local void gz_reset OF((gz_statep));
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local gzFile gz_open OF((const char *, int, const char *));
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local gzFile gz_open OF((const void *, int, const char *));
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#if defined UNDER_CE
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@ -71,28 +75,40 @@ char ZLIB_INTERNAL *gz_strwinerror (error)
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local void gz_reset(state)
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gz_statep state;
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{
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state->x.have = 0; /* no output data available */
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if (state->mode == GZ_READ) { /* for reading ... */
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state->have = 0; /* no output data available */
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state->eof = 0; /* not at end of file */
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state->past = 0; /* have not read past end yet */
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state->how = LOOK; /* look for gzip header */
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state->direct = 1; /* default for empty file */
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}
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state->seek = 0; /* no seek request pending */
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gz_error(state, Z_OK, NULL); /* clear error */
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state->pos = 0; /* no uncompressed data yet */
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state->x.pos = 0; /* no uncompressed data yet */
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state->strm.avail_in = 0; /* no input data yet */
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}
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/* Open a gzip file either by name or file descriptor. */
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local gzFile gz_open(path, fd, mode)
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const char *path;
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const void *path;
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int fd;
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const char *mode;
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{
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gz_statep state;
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size_t len;
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int oflag;
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#ifdef O_CLOEXEC
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int cloexec = 0;
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#endif
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#ifdef O_EXCL
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int exclusive = 0;
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#endif
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/* check input */
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if (path == NULL)
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return NULL;
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/* allocate gzFile structure to return */
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state = malloc(sizeof(gz_state));
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state = (gz_statep)malloc(sizeof(gz_state));
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if (state == NULL)
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return NULL;
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state->size = 0; /* no buffers allocated yet */
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@ -103,6 +119,7 @@ local gzFile gz_open(path, fd, mode)
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state->mode = GZ_NONE;
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state->level = Z_DEFAULT_COMPRESSION;
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state->strategy = Z_DEFAULT_STRATEGY;
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state->direct = 0;
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while (*mode) {
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if (*mode >= '0' && *mode <= '9')
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state->level = *mode - '0';
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@ -124,6 +141,16 @@ local gzFile gz_open(path, fd, mode)
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return NULL;
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case 'b': /* ignore -- will request binary anyway */
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break;
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#ifdef O_CLOEXEC
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case 'e':
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cloexec = 1;
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break;
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#endif
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#ifdef O_EXCL
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case 'x':
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exclusive = 1;
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break;
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#endif
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case 'f':
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state->strategy = Z_FILTERED;
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break;
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@ -135,6 +162,10 @@ local gzFile gz_open(path, fd, mode)
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break;
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case 'F':
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state->strategy = Z_FIXED;
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break;
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case 'T':
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state->direct = 1;
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break;
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default: /* could consider as an error, but just ignore */
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;
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}
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@ -147,30 +178,71 @@ local gzFile gz_open(path, fd, mode)
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return NULL;
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}
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/* can't force transparent read */
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if (state->mode == GZ_READ) {
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if (state->direct) {
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free(state);
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return NULL;
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}
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state->direct = 1; /* for empty file */
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}
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/* save the path name for error messages */
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state->path = malloc(strlen(path) + 1);
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#ifdef _WIN32
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if (fd == -2) {
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len = wcstombs(NULL, path, 0);
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if (len == (size_t)-1)
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len = 0;
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}
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else
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#endif
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len = strlen((const char *)path);
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state->path = (char *)malloc(len + 1);
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if (state->path == NULL) {
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free(state);
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return NULL;
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}
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strcpy(state->path, path);
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#ifdef _WIN32
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if (fd == -2)
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if (len)
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wcstombs(state->path, path, len + 1);
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else
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*(state->path) = 0;
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else
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#endif
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#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
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snprintf(state->path, len + 1, "%s", (const char *)path);
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#else
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strcpy(state->path, path);
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#endif
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/* open the file with the appropriate mode (or just use fd) */
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state->fd = fd != -1 ? fd :
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open(path,
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/* compute the flags for open() */
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oflag =
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#ifdef O_LARGEFILE
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O_LARGEFILE |
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O_LARGEFILE |
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#endif
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#ifdef O_BINARY
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O_BINARY |
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O_BINARY |
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#endif
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(state->mode == GZ_READ ?
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O_RDONLY :
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(O_WRONLY | O_CREAT | (
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state->mode == GZ_WRITE ?
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O_TRUNC :
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O_APPEND))),
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0666);
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#ifdef O_CLOEXEC
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(cloexec ? O_CLOEXEC : 0) |
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#endif
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(state->mode == GZ_READ ?
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O_RDONLY :
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(O_WRONLY | O_CREAT |
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#ifdef O_EXCL
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(exclusive ? O_EXCL : 0) |
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#endif
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(state->mode == GZ_WRITE ?
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O_TRUNC :
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O_APPEND)));
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/* open the file with the appropriate flags (or just use fd) */
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state->fd = fd > -1 ? fd : (
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#ifdef _WIN32
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fd == -2 ? _wopen(path, oflag, 0666) :
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#endif
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open((const char *)path, oflag, 0666));
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if (state->fd == -1) {
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free(state->path);
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free(state);
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@ -216,14 +288,28 @@ gzFile ZEXPORT gzdopen(fd, mode)
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char *path; /* identifier for error messages */
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gzFile gz;
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if (fd == -1 || (path = malloc(7 + 3 * sizeof(int))) == NULL)
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if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
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return NULL;
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#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
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snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
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#else
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sprintf(path, "<fd:%d>", fd); /* for debugging */
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#endif
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gz = gz_open(path, fd, mode);
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free(path);
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return gz;
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}
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/* -- see zlib.h -- */
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#ifdef _WIN32
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gzFile ZEXPORT gzopen_w(path, mode)
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const wchar_t *path;
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const char *mode;
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{
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return gz_open(path, -2, mode);
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}
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#endif
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/* -- see zlib.h -- */
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int ZEXPORT gzbuffer(file, size)
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gzFile file;
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@ -243,8 +329,8 @@ int ZEXPORT gzbuffer(file, size)
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return -1;
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/* check and set requested size */
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if (size == 0)
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return -1;
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if (size < 2)
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size = 2; /* need two bytes to check magic header */
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state->want = size;
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return 0;
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}
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@ -261,7 +347,8 @@ int ZEXPORT gzrewind(file)
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state = (gz_statep)file;
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/* check that we're reading and that there's no error */
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if (state->mode != GZ_READ || state->err != Z_OK)
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if (state->mode != GZ_READ ||
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(state->err != Z_OK && state->err != Z_BUF_ERROR))
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return -1;
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/* back up and start over */
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@ -289,7 +376,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
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return -1;
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/* check that there's no error */
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if (state->err != Z_OK)
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if (state->err != Z_OK && state->err != Z_BUF_ERROR)
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return -1;
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/* can only seek from start or relative to current position */
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@ -298,31 +385,32 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
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/* normalize offset to a SEEK_CUR specification */
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if (whence == SEEK_SET)
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offset -= state->pos;
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offset -= state->x.pos;
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else if (state->seek)
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offset += state->skip;
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state->seek = 0;
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/* if within raw area while reading, just go there */
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if (state->mode == GZ_READ && state->how == COPY &&
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state->pos + offset >= state->raw) {
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ret = LSEEK(state->fd, offset - state->have, SEEK_CUR);
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state->x.pos + offset >= 0) {
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ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
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if (ret == -1)
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return -1;
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state->have = 0;
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state->x.have = 0;
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state->eof = 0;
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state->past = 0;
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state->seek = 0;
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gz_error(state, Z_OK, NULL);
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state->strm.avail_in = 0;
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state->pos += offset;
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return state->pos;
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state->x.pos += offset;
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return state->x.pos;
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}
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/* calculate skip amount, rewinding if needed for back seek when reading */
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if (offset < 0) {
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if (state->mode != GZ_READ) /* writing -- can't go backwards */
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return -1;
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offset += state->pos;
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offset += state->x.pos;
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if (offset < 0) /* before start of file! */
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return -1;
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if (gzrewind(file) == -1) /* rewind, then skip to offset */
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@ -331,11 +419,11 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
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/* if reading, skip what's in output buffer (one less gzgetc() check) */
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if (state->mode == GZ_READ) {
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n = GT_OFF(state->have) || (z_off64_t)state->have > offset ?
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(unsigned)offset : state->have;
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state->have -= n;
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state->next += n;
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state->pos += n;
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n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
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(unsigned)offset : state->x.have;
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state->x.have -= n;
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state->x.next += n;
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state->x.pos += n;
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offset -= n;
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}
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@ -344,7 +432,7 @@ z_off64_t ZEXPORT gzseek64(file, offset, whence)
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state->seek = 1;
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state->skip = offset;
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}
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return state->pos + offset;
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return state->x.pos + offset;
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}
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/* -- see zlib.h -- */
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@ -373,7 +461,7 @@ z_off64_t ZEXPORT gztell64(file)
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return -1;
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/* return position */
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return state->pos + (state->seek ? state->skip : 0);
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return state->x.pos + (state->seek ? state->skip : 0);
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}
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/* -- see zlib.h -- */
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@ -433,8 +521,7 @@ int ZEXPORT gzeof(file)
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return 0;
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/* return end-of-file state */
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return state->mode == GZ_READ ?
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(state->eof && state->strm.avail_in == 0 && state->have == 0) : 0;
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return state->mode == GZ_READ ? state->past : 0;
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}
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/* -- see zlib.h -- */
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@ -454,7 +541,8 @@ const char * ZEXPORT gzerror(file, errnum)
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/* return error information */
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if (errnum != NULL)
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*errnum = state->err;
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return state->msg == NULL ? "" : state->msg;
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return state->err == Z_MEM_ERROR ? "out of memory" :
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(state->msg == NULL ? "" : state->msg);
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}
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/* -- see zlib.h -- */
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@ -471,8 +559,10 @@ void ZEXPORT gzclearerr(file)
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return;
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/* clear error and end-of-file */
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if (state->mode == GZ_READ)
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if (state->mode == GZ_READ) {
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state->eof = 0;
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state->past = 0;
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}
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gz_error(state, Z_OK, NULL);
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}
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@ -494,26 +584,33 @@ void ZLIB_INTERNAL gz_error(state, err, msg)
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state->msg = NULL;
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}
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/* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
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if (err != Z_OK && err != Z_BUF_ERROR)
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state->x.have = 0;
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/* set error code, and if no message, then done */
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state->err = err;
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if (msg == NULL)
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return;
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/* for an out of memory error, save as static string */
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if (err == Z_MEM_ERROR) {
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state->msg = (char *)msg;
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/* for an out of memory error, return literal string when requested */
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if (err == Z_MEM_ERROR)
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return;
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}
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/* construct error message with path */
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if ((state->msg = malloc(strlen(state->path) + strlen(msg) + 3)) == NULL) {
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if ((state->msg = (char *)malloc(strlen(state->path) + strlen(msg) + 3)) ==
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NULL) {
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state->err = Z_MEM_ERROR;
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state->msg = (char *)"out of memory";
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return;
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}
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#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
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snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
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"%s%s%s", state->path, ": ", msg);
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#else
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strcpy(state->msg, state->path);
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strcat(state->msg, ": ");
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strcat(state->msg, msg);
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#endif
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return;
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}
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