Index: third_party/zlib/gzio.c |
diff --git a/third_party/zlib/gzio.c b/third_party/zlib/gzio.c |
deleted file mode 100644 |
index b5f052c542dc9189cdfff74d0c3f8d2be77d6353..0000000000000000000000000000000000000000 |
--- a/third_party/zlib/gzio.c |
+++ /dev/null |
@@ -1,1033 +0,0 @@ |
-/* gzio.c -- IO on .gz files |
- * Copyright (C) 1995-2005 Jean-loup Gailly. |
- * For conditions of distribution and use, see copyright notice in zlib.h |
- * |
- * Compile this file with -DNO_GZCOMPRESS to avoid the compression code. |
- */ |
- |
-/* @(#) $Id: gzio.c,v 3.7 2005/08/04 19:14:14 tor%cs.brown.edu Exp $ */ |
- |
-#include <stdio.h> |
- |
-#include "zutil.h" |
- |
-#ifdef NO_DEFLATE /* for compatibility with old definition */ |
-# define NO_GZCOMPRESS |
-#endif |
- |
-#ifndef NO_DUMMY_DECL |
-struct internal_state {int dummy;}; /* for buggy compilers */ |
-#endif |
- |
-#ifndef Z_BUFSIZE |
-# ifdef MAXSEG_64K |
-# define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */ |
-# else |
-# define Z_BUFSIZE 16384 |
-# endif |
-#endif |
-#ifndef Z_PRINTF_BUFSIZE |
-# define Z_PRINTF_BUFSIZE 4096 |
-#endif |
- |
-#ifdef __MVS__ |
-# pragma map (fdopen , "\174\174FDOPEN") |
- FILE *fdopen(int, const char *); |
-#endif |
- |
-#ifndef STDC |
-extern voidp malloc OF((uInt size)); |
-extern void free OF((voidpf ptr)); |
-#endif |
- |
-#define ALLOC(size) malloc(size) |
-#define TRYFREE(p) {if (p) free(p);} |
- |
-static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */ |
- |
-/* gzip flag byte */ |
-#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ |
-#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */ |
-#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ |
-#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ |
-#define COMMENT 0x10 /* bit 4 set: file comment present */ |
-#define RESERVED 0xE0 /* bits 5..7: reserved */ |
- |
-typedef struct gz_stream { |
- z_stream stream; |
- int z_err; /* error code for last stream operation */ |
- int z_eof; /* set if end of input file */ |
- FILE *file; /* .gz file */ |
- Byte *inbuf; /* input buffer */ |
- Byte *outbuf; /* output buffer */ |
- uLong crc; /* crc32 of uncompressed data */ |
- char *msg; /* error message */ |
- char *path; /* path name for debugging only */ |
- int transparent; /* 1 if input file is not a .gz file */ |
- char mode; /* 'w' or 'r' */ |
- z_off_t start; /* start of compressed data in file (header skipped) */ |
- z_off_t in; /* bytes into deflate or inflate */ |
- z_off_t out; /* bytes out of deflate or inflate */ |
- int back; /* one character push-back */ |
- int last; /* true if push-back is last character */ |
-} gz_stream; |
- |
- |
-local gzFile gz_open OF((const char *path, const char *mode, int fd)); |
-#ifndef NO_GZCOMPRESS // Google Gears addition, to avoid compile warning |
-local int do_flush OF((gzFile file, int flush)); |
-#endif |
-local int get_byte OF((gz_stream *s)); |
-local void check_header OF((gz_stream *s)); |
-local int destroy OF((gz_stream *s)); |
-#ifndef NO_GZCOMPRESS // Google Gears addition, to avoid compile warning |
-local void putLong OF((FILE *file, uLong x)); |
-#endif |
-local uLong getLong OF((gz_stream *s)); |
- |
-/* =========================================================================== |
- Opens a gzip (.gz) file for reading or writing. The mode parameter |
- is as in fopen ("rb" or "wb"). The file is given either by file descriptor |
- or path name (if fd == -1). |
- gz_open returns NULL if the file could not be opened or if there was |
- insufficient memory to allocate the (de)compression state; errno |
- can be checked to distinguish the two cases (if errno is zero, the |
- zlib error is Z_MEM_ERROR). |
-*/ |
-local gzFile gz_open (path, mode, fd) |
- const char *path; |
- const char *mode; |
- int fd; |
-{ |
- int err; |
- int level = Z_DEFAULT_COMPRESSION; /* compression level */ |
- int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */ |
- char *p = (char*)mode; |
- gz_stream *s; |
- char fmode[80]; /* copy of mode, without the compression level */ |
- char *m = fmode; |
- |
- if (!path || !mode) return Z_NULL; |
- |
- s = (gz_stream *)ALLOC(sizeof(gz_stream)); |
- if (!s) return Z_NULL; |
- |
- s->stream.zalloc = (alloc_func)0; |
- s->stream.zfree = (free_func)0; |
- s->stream.opaque = (voidpf)0; |
- s->stream.next_in = s->inbuf = Z_NULL; |
- s->stream.next_out = s->outbuf = Z_NULL; |
- s->stream.avail_in = s->stream.avail_out = 0; |
- s->file = NULL; |
- s->z_err = Z_OK; |
- s->z_eof = 0; |
- s->in = 0; |
- s->out = 0; |
- s->back = EOF; |
- s->crc = crc32(0L, Z_NULL, 0); |
- s->msg = NULL; |
- s->transparent = 0; |
- |
- s->path = (char*)ALLOC(strlen(path)+1); |
- if (s->path == NULL) { |
- return destroy(s), (gzFile)Z_NULL; |
- } |
- strcpy(s->path, path); /* do this early for debugging */ |
- |
- s->mode = '\0'; |
- do { |
- if (*p == 'r') s->mode = 'r'; |
- if (*p == 'w' || *p == 'a') s->mode = 'w'; |
- if (*p >= '0' && *p <= '9') { |
- level = *p - '0'; |
- } else if (*p == 'f') { |
- strategy = Z_FILTERED; |
- } else if (*p == 'h') { |
- strategy = Z_HUFFMAN_ONLY; |
- } else if (*p == 'R') { |
- strategy = Z_RLE; |
- } else { |
- *m++ = *p; /* copy the mode */ |
- } |
- } while (*p++ && m != fmode + sizeof(fmode)); |
- if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL; |
- |
- if (s->mode == 'w') { |
-#ifdef NO_GZCOMPRESS |
- err = Z_STREAM_ERROR; |
-#else |
- err = deflateInit2(&(s->stream), level, |
- Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy); |
- /* windowBits is passed < 0 to suppress zlib header */ |
- |
- s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE); |
-#endif |
- if (err != Z_OK || s->outbuf == Z_NULL) { |
- return destroy(s), (gzFile)Z_NULL; |
- } |
- } else { |
- s->stream.next_in = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); |
- |
- err = inflateInit2(&(s->stream), -MAX_WBITS); |
- /* windowBits is passed < 0 to tell that there is no zlib header. |
- * Note that in this case inflate *requires* an extra "dummy" byte |
- * after the compressed stream in order to complete decompression and |
- * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are |
- * present after the compressed stream. |
- */ |
- if (err != Z_OK || s->inbuf == Z_NULL) { |
- return destroy(s), (gzFile)Z_NULL; |
- } |
- } |
- s->stream.avail_out = Z_BUFSIZE; |
- |
- errno = 0; |
- s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode); |
- |
- if (s->file == NULL) { |
- return destroy(s), (gzFile)Z_NULL; |
- } |
- if (s->mode == 'w') { |
- /* Write a very simple .gz header: |
- */ |
- fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1], |
- Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE); |
- s->start = 10L; |
- /* We use 10L instead of ftell(s->file) to because ftell causes an |
- * fflush on some systems. This version of the library doesn't use |
- * start anyway in write mode, so this initialization is not |
- * necessary. |
- */ |
- } else { |
- check_header(s); /* skip the .gz header */ |
- s->start = ftell(s->file) - s->stream.avail_in; |
- } |
- |
- return (gzFile)s; |
-} |
- |
-/* =========================================================================== |
- Opens a gzip (.gz) file for reading or writing. |
-*/ |
-gzFile ZEXPORT gzopen (path, mode) |
- const char *path; |
- const char *mode; |
-{ |
- return gz_open (path, mode, -1); |
-} |
- |
-/* =========================================================================== |
- Associate a gzFile with the file descriptor fd. fd is not dup'ed here |
- to mimic the behavio(u)r of fdopen. |
-*/ |
-gzFile ZEXPORT gzdopen (fd, mode) |
- int fd; |
- const char *mode; |
-{ |
- char name[46]; /* allow for up to 128-bit integers */ |
- |
- if (fd < 0) return (gzFile)Z_NULL; |
- sprintf(name, "<fd:%d>", fd); /* for debugging */ |
- |
- return gz_open (name, mode, fd); |
-} |
- |
-/* =========================================================================== |
- * Update the compression level and strategy |
- */ |
-int ZEXPORT gzsetparams (file, level, strategy) |
- gzFile file; |
- int level; |
- int strategy; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; |
- |
- /* Make room to allow flushing */ |
- if (s->stream.avail_out == 0) { |
- |
- s->stream.next_out = s->outbuf; |
- if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) { |
- s->z_err = Z_ERRNO; |
- } |
- s->stream.avail_out = Z_BUFSIZE; |
- } |
- |
- return deflateParams (&(s->stream), level, strategy); |
-} |
- |
-/* =========================================================================== |
- Read a byte from a gz_stream; update next_in and avail_in. Return EOF |
- for end of file. |
- IN assertion: the stream s has been sucessfully opened for reading. |
-*/ |
-local int get_byte(s) |
- gz_stream *s; |
-{ |
- if (s->z_eof) return EOF; |
- if (s->stream.avail_in == 0) { |
- errno = 0; |
- s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); |
- if (s->stream.avail_in == 0) { |
- s->z_eof = 1; |
- if (ferror(s->file)) s->z_err = Z_ERRNO; |
- return EOF; |
- } |
- s->stream.next_in = s->inbuf; |
- } |
- s->stream.avail_in--; |
- return *(s->stream.next_in)++; |
-} |
- |
-/* =========================================================================== |
- Check the gzip header of a gz_stream opened for reading. Set the stream |
- mode to transparent if the gzip magic header is not present; set s->err |
- to Z_DATA_ERROR if the magic header is present but the rest of the header |
- is incorrect. |
- IN assertion: the stream s has already been created sucessfully; |
- s->stream.avail_in is zero for the first time, but may be non-zero |
- for concatenated .gz files. |
-*/ |
-local void check_header(s) |
- gz_stream *s; |
-{ |
- int method; /* method byte */ |
- int flags; /* flags byte */ |
- uInt len; |
- int c; |
- |
- /* Assure two bytes in the buffer so we can peek ahead -- handle case |
- where first byte of header is at the end of the buffer after the last |
- gzip segment */ |
- len = s->stream.avail_in; |
- if (len < 2) { |
- if (len) s->inbuf[0] = s->stream.next_in[0]; |
- errno = 0; |
- len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file); |
- if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO; |
- s->stream.avail_in += len; |
- s->stream.next_in = s->inbuf; |
- if (s->stream.avail_in < 2) { |
- s->transparent = s->stream.avail_in; |
- return; |
- } |
- } |
- |
- /* Peek ahead to check the gzip magic header */ |
- if (s->stream.next_in[0] != gz_magic[0] || |
- s->stream.next_in[1] != gz_magic[1]) { |
- s->transparent = 1; |
- return; |
- } |
- s->stream.avail_in -= 2; |
- s->stream.next_in += 2; |
- |
- /* Check the rest of the gzip header */ |
- method = get_byte(s); |
- flags = get_byte(s); |
- if (method != Z_DEFLATED || (flags & RESERVED) != 0) { |
- s->z_err = Z_DATA_ERROR; |
- return; |
- } |
- |
- /* Discard time, xflags and OS code: */ |
- for (len = 0; len < 6; len++) (void)get_byte(s); |
- |
- if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */ |
- len = (uInt)get_byte(s); |
- len += ((uInt)get_byte(s))<<8; |
- /* len is garbage if EOF but the loop below will quit anyway */ |
- while (len-- != 0 && get_byte(s) != EOF) ; |
- } |
- if ((flags & ORIG_NAME) != 0) { /* skip the original file name */ |
- while ((c = get_byte(s)) != 0 && c != EOF) ; |
- } |
- if ((flags & COMMENT) != 0) { /* skip the .gz file comment */ |
- while ((c = get_byte(s)) != 0 && c != EOF) ; |
- } |
- if ((flags & HEAD_CRC) != 0) { /* skip the header crc */ |
- for (len = 0; len < 2; len++) (void)get_byte(s); |
- } |
- s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK; |
-} |
- |
- /* =========================================================================== |
- * Cleanup then free the given gz_stream. Return a zlib error code. |
- Try freeing in the reverse order of allocations. |
- */ |
-local int destroy (s) |
- gz_stream *s; |
-{ |
- int err = Z_OK; |
- |
- if (!s) return Z_STREAM_ERROR; |
- |
- TRYFREE(s->msg); |
- |
- if (s->stream.state != NULL) { |
- if (s->mode == 'w') { |
-#ifdef NO_GZCOMPRESS |
- err = Z_STREAM_ERROR; |
-#else |
- err = deflateEnd(&(s->stream)); |
-#endif |
- } else if (s->mode == 'r') { |
- err = inflateEnd(&(s->stream)); |
- } |
- } |
- if (s->file != NULL && fclose(s->file)) { |
-#ifdef ESPIPE |
- if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */ |
-#endif |
- err = Z_ERRNO; |
- } |
- if (s->z_err < 0) err = s->z_err; |
- |
- TRYFREE(s->inbuf); |
- TRYFREE(s->outbuf); |
- TRYFREE(s->path); |
- TRYFREE(s); |
- return err; |
-} |
- |
-/* =========================================================================== |
- Reads the given number of uncompressed bytes from the compressed file. |
- gzread returns the number of bytes actually read (0 for end of file). |
-*/ |
-int ZEXPORT gzread (file, buf, len) |
- gzFile file; |
- voidp buf; |
- unsigned len; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- Bytef *start = (Bytef*)buf; /* starting point for crc computation */ |
- Byte *next_out; /* == stream.next_out but not forced far (for MSDOS) */ |
- |
- if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR; |
- |
- if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1; |
- if (s->z_err == Z_STREAM_END) return 0; /* EOF */ |
- |
- next_out = (Byte*)buf; |
- s->stream.next_out = (Bytef*)buf; |
- s->stream.avail_out = len; |
- |
- if (s->stream.avail_out && s->back != EOF) { |
- *next_out++ = s->back; |
- s->stream.next_out++; |
- s->stream.avail_out--; |
- s->back = EOF; |
- s->out++; |
- start++; |
- if (s->last) { |
- s->z_err = Z_STREAM_END; |
- return 1; |
- } |
- } |
- |
- while (s->stream.avail_out != 0) { |
- |
- if (s->transparent) { |
- /* Copy first the lookahead bytes: */ |
- uInt n = s->stream.avail_in; |
- if (n > s->stream.avail_out) n = s->stream.avail_out; |
- if (n > 0) { |
- zmemcpy(s->stream.next_out, s->stream.next_in, n); |
- next_out += n; |
- s->stream.next_out = next_out; |
- s->stream.next_in += n; |
- s->stream.avail_out -= n; |
- s->stream.avail_in -= n; |
- } |
- if (s->stream.avail_out > 0) { |
- s->stream.avail_out -= |
- (uInt)fread(next_out, 1, s->stream.avail_out, s->file); |
- } |
- len -= s->stream.avail_out; |
- s->in += len; |
- s->out += len; |
- if (len == 0) s->z_eof = 1; |
- return (int)len; |
- } |
- if (s->stream.avail_in == 0 && !s->z_eof) { |
- |
- errno = 0; |
- s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file); |
- if (s->stream.avail_in == 0) { |
- s->z_eof = 1; |
- if (ferror(s->file)) { |
- s->z_err = Z_ERRNO; |
- break; |
- } |
- } |
- s->stream.next_in = s->inbuf; |
- } |
- s->in += s->stream.avail_in; |
- s->out += s->stream.avail_out; |
- s->z_err = inflate(&(s->stream), Z_NO_FLUSH); |
- s->in -= s->stream.avail_in; |
- s->out -= s->stream.avail_out; |
- |
- if (s->z_err == Z_STREAM_END) { |
- /* Check CRC and original size */ |
- s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); |
- start = s->stream.next_out; |
- |
- if (getLong(s) != s->crc) { |
- s->z_err = Z_DATA_ERROR; |
- } else { |
- (void)getLong(s); |
- /* The uncompressed length returned by above getlong() may be |
- * different from s->out in case of concatenated .gz files. |
- * Check for such files: |
- */ |
- check_header(s); |
- if (s->z_err == Z_OK) { |
- inflateReset(&(s->stream)); |
- s->crc = crc32(0L, Z_NULL, 0); |
- } |
- } |
- } |
- if (s->z_err != Z_OK || s->z_eof) break; |
- } |
- s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start)); |
- |
- if (len == s->stream.avail_out && |
- (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO)) |
- return -1; |
- return (int)(len - s->stream.avail_out); |
-} |
- |
- |
-/* =========================================================================== |
- Reads one byte from the compressed file. gzgetc returns this byte |
- or -1 in case of end of file or error. |
-*/ |
-int ZEXPORT gzgetc(file) |
- gzFile file; |
-{ |
- unsigned char c; |
- |
- return gzread(file, &c, 1) == 1 ? c : -1; |
-} |
- |
- |
-/* =========================================================================== |
- Push one byte back onto the stream. |
-*/ |
-int ZEXPORT gzungetc(c, file) |
- int c; |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF; |
- s->back = c; |
- s->out--; |
- s->last = (s->z_err == Z_STREAM_END); |
- if (s->last) s->z_err = Z_OK; |
- s->z_eof = 0; |
- return c; |
-} |
- |
- |
-/* =========================================================================== |
- Reads bytes from the compressed file until len-1 characters are |
- read, or a newline character is read and transferred to buf, or an |
- end-of-file condition is encountered. The string is then terminated |
- with a null character. |
- gzgets returns buf, or Z_NULL in case of error. |
- |
- The current implementation is not optimized at all. |
-*/ |
-char * ZEXPORT gzgets(file, buf, len) |
- gzFile file; |
- char *buf; |
- int len; |
-{ |
- char *b = buf; |
- if (buf == Z_NULL || len <= 0) return Z_NULL; |
- |
- while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ; |
- *buf = '\0'; |
- return b == buf && len > 0 ? Z_NULL : b; |
-} |
- |
- |
-#ifndef NO_GZCOMPRESS |
-/* =========================================================================== |
- Writes the given number of uncompressed bytes into the compressed file. |
- gzwrite returns the number of bytes actually written (0 in case of error). |
-*/ |
-int ZEXPORT gzwrite (file, buf, len) |
- gzFile file; |
- voidpc buf; |
- unsigned len; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; |
- |
- s->stream.next_in = (Bytef*)buf; |
- s->stream.avail_in = len; |
- |
- while (s->stream.avail_in != 0) { |
- |
- if (s->stream.avail_out == 0) { |
- |
- s->stream.next_out = s->outbuf; |
- if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) { |
- s->z_err = Z_ERRNO; |
- break; |
- } |
- s->stream.avail_out = Z_BUFSIZE; |
- } |
- s->in += s->stream.avail_in; |
- s->out += s->stream.avail_out; |
- s->z_err = deflate(&(s->stream), Z_NO_FLUSH); |
- s->in -= s->stream.avail_in; |
- s->out -= s->stream.avail_out; |
- if (s->z_err != Z_OK) break; |
- } |
- s->crc = crc32(s->crc, (const Bytef *)buf, len); |
- |
- return (int)(len - s->stream.avail_in); |
-} |
- |
- |
-/* =========================================================================== |
- Converts, formats, and writes the args to the compressed file under |
- control of the format string, as in fprintf. gzprintf returns the number of |
- uncompressed bytes actually written (0 in case of error). |
-*/ |
-#ifdef STDC |
-#include <stdarg.h> |
- |
-int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...) |
-{ |
- char buf[Z_PRINTF_BUFSIZE]; |
- va_list va; |
- int len; |
- |
- buf[sizeof(buf) - 1] = 0; |
- va_start(va, format); |
-#ifdef NO_vsnprintf |
-# ifdef HAS_vsprintf_void |
- (void)vsprintf(buf, format, va); |
- va_end(va); |
- for (len = 0; len < sizeof(buf); len++) |
- if (buf[len] == 0) break; |
-# else |
- len = vsprintf(buf, format, va); |
- va_end(va); |
-# endif |
-#else |
-# ifdef HAS_vsnprintf_void |
- (void)vsnprintf(buf, sizeof(buf), format, va); |
- va_end(va); |
- len = strlen(buf); |
-# else |
- len = vsnprintf(buf, sizeof(buf), format, va); |
- va_end(va); |
-# endif |
-#endif |
- if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0) |
- return 0; |
- return gzwrite(file, buf, (unsigned)len); |
-} |
-#else /* not ANSI C */ |
- |
-int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, |
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20) |
- gzFile file; |
- const char *format; |
- int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, |
- a11, a12, a13, a14, a15, a16, a17, a18, a19, a20; |
-{ |
- char buf[Z_PRINTF_BUFSIZE]; |
- int len; |
- |
- buf[sizeof(buf) - 1] = 0; |
-#ifdef NO_snprintf |
-# ifdef HAS_sprintf_void |
- sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8, |
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); |
- for (len = 0; len < sizeof(buf); len++) |
- if (buf[len] == 0) break; |
-# else |
- len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8, |
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); |
-# endif |
-#else |
-# ifdef HAS_snprintf_void |
- snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8, |
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); |
- len = strlen(buf); |
-# else |
- len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8, |
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20); |
-# endif |
-#endif |
- if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0) |
- return 0; |
- return gzwrite(file, buf, len); |
-} |
-#endif |
- |
-/* =========================================================================== |
- Writes c, converted to an unsigned char, into the compressed file. |
- gzputc returns the value that was written, or -1 in case of error. |
-*/ |
-int ZEXPORT gzputc(file, c) |
- gzFile file; |
- int c; |
-{ |
- unsigned char cc = (unsigned char) c; /* required for big endian systems */ |
- |
- return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1; |
-} |
- |
- |
-/* =========================================================================== |
- Writes the given null-terminated string to the compressed file, excluding |
- the terminating null character. |
- gzputs returns the number of characters written, or -1 in case of error. |
-*/ |
-int ZEXPORT gzputs(file, s) |
- gzFile file; |
- const char *s; |
-{ |
- return gzwrite(file, (char*)s, (unsigned)strlen(s)); |
-} |
- |
- |
-/* =========================================================================== |
- Flushes all pending output into the compressed file. The parameter |
- flush is as in the deflate() function. |
-*/ |
-local int do_flush (file, flush) |
- gzFile file; |
- int flush; |
-{ |
- uInt len; |
- int done = 0; |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR; |
- |
- s->stream.avail_in = 0; /* should be zero already anyway */ |
- |
- for (;;) { |
- len = Z_BUFSIZE - s->stream.avail_out; |
- |
- if (len != 0) { |
- if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) { |
- s->z_err = Z_ERRNO; |
- return Z_ERRNO; |
- } |
- s->stream.next_out = s->outbuf; |
- s->stream.avail_out = Z_BUFSIZE; |
- } |
- if (done) break; |
- s->out += s->stream.avail_out; |
- s->z_err = deflate(&(s->stream), flush); |
- s->out -= s->stream.avail_out; |
- |
- /* Ignore the second of two consecutive flushes: */ |
- if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK; |
- |
- /* deflate has finished flushing only when it hasn't used up |
- * all the available space in the output buffer: |
- */ |
- done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END); |
- |
- if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break; |
- } |
- return s->z_err == Z_STREAM_END ? Z_OK : s->z_err; |
-} |
- |
-int ZEXPORT gzflush (file, flush) |
- gzFile file; |
- int flush; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- int err = do_flush (file, flush); |
- |
- if (err) return err; |
- fflush(s->file); |
- return s->z_err == Z_STREAM_END ? Z_OK : s->z_err; |
-} |
-#endif /* NO_GZCOMPRESS */ |
- |
-/* =========================================================================== |
- Sets the starting position for the next gzread or gzwrite on the given |
- compressed file. The offset represents a number of bytes in the |
- gzseek returns the resulting offset location as measured in bytes from |
- the beginning of the uncompressed stream, or -1 in case of error. |
- SEEK_END is not implemented, returns error. |
- In this version of the library, gzseek can be extremely slow. |
-*/ |
-z_off_t ZEXPORT gzseek (file, offset, whence) |
- gzFile file; |
- z_off_t offset; |
- int whence; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || whence == SEEK_END || |
- s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) { |
- return -1L; |
- } |
- |
- if (s->mode == 'w') { |
-#ifdef NO_GZCOMPRESS |
- return -1L; |
-#else |
- if (whence == SEEK_SET) { |
- offset -= s->in; |
- } |
- if (offset < 0) return -1L; |
- |
- /* At this point, offset is the number of zero bytes to write. */ |
- if (s->inbuf == Z_NULL) { |
- s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */ |
- if (s->inbuf == Z_NULL) return -1L; |
- zmemzero(s->inbuf, Z_BUFSIZE); |
- } |
- while (offset > 0) { |
- uInt size = Z_BUFSIZE; |
- if (offset < Z_BUFSIZE) size = (uInt)offset; |
- |
- size = gzwrite(file, s->inbuf, size); |
- if (size == 0) return -1L; |
- |
- offset -= size; |
- } |
- return s->in; |
-#endif |
- } |
- /* Rest of function is for reading only */ |
- |
- /* compute absolute position */ |
- if (whence == SEEK_CUR) { |
- offset += s->out; |
- } |
- if (offset < 0) return -1L; |
- |
- if (s->transparent) { |
- /* map to fseek */ |
- s->back = EOF; |
- s->stream.avail_in = 0; |
- s->stream.next_in = s->inbuf; |
- if (fseek(s->file, offset, SEEK_SET) < 0) return -1L; |
- |
- s->in = s->out = offset; |
- return offset; |
- } |
- |
- /* For a negative seek, rewind and use positive seek */ |
- if (offset >= s->out) { |
- offset -= s->out; |
- } else if (gzrewind(file) < 0) { |
- return -1L; |
- } |
- /* offset is now the number of bytes to skip. */ |
- |
- if (offset != 0 && s->outbuf == Z_NULL) { |
- s->outbuf = (Byte*)ALLOC(Z_BUFSIZE); |
- if (s->outbuf == Z_NULL) return -1L; |
- } |
- if (offset && s->back != EOF) { |
- s->back = EOF; |
- s->out++; |
- offset--; |
- if (s->last) s->z_err = Z_STREAM_END; |
- } |
- while (offset > 0) { |
- int size = Z_BUFSIZE; |
- if (offset < Z_BUFSIZE) size = (int)offset; |
- |
- size = gzread(file, s->outbuf, (uInt)size); |
- if (size <= 0) return -1L; |
- offset -= size; |
- } |
- return s->out; |
-} |
- |
-/* =========================================================================== |
- Rewinds input file. |
-*/ |
-int ZEXPORT gzrewind (file) |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'r') return -1; |
- |
- s->z_err = Z_OK; |
- s->z_eof = 0; |
- s->back = EOF; |
- s->stream.avail_in = 0; |
- s->stream.next_in = s->inbuf; |
- s->crc = crc32(0L, Z_NULL, 0); |
- if (!s->transparent) (void)inflateReset(&s->stream); |
- s->in = 0; |
- s->out = 0; |
- return fseek(s->file, s->start, SEEK_SET); |
-} |
- |
-/* =========================================================================== |
- Returns the starting position for the next gzread or gzwrite on the |
- given compressed file. This position represents a number of bytes in the |
- uncompressed data stream. |
-*/ |
-z_off_t ZEXPORT gztell (file) |
- gzFile file; |
-{ |
- return gzseek(file, 0L, SEEK_CUR); |
-} |
- |
-/* =========================================================================== |
- Returns 1 when EOF has previously been detected reading the given |
- input stream, otherwise zero. |
-*/ |
-int ZEXPORT gzeof (file) |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- /* With concatenated compressed files that can have embedded |
- * crc trailers, z_eof is no longer the only/best indicator of EOF |
- * on a gz_stream. Handle end-of-stream error explicitly here. |
- */ |
- if (s == NULL || s->mode != 'r') return 0; |
- if (s->z_eof) return 1; |
- return s->z_err == Z_STREAM_END; |
-} |
- |
-/* =========================================================================== |
- Returns 1 if reading and doing so transparently, otherwise zero. |
-*/ |
-int ZEXPORT gzdirect (file) |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL || s->mode != 'r') return 0; |
- return s->transparent; |
-} |
- |
-#ifndef NO_GZCOMPRESS // Google Gears addition, to avoid compile warning |
-/* =========================================================================== |
- Outputs a long in LSB order to the given file |
-*/ |
-local void putLong (file, x) |
- FILE *file; |
- uLong x; |
-{ |
- int n; |
- for (n = 0; n < 4; n++) { |
- fputc((int)(x & 0xff), file); |
- x >>= 8; |
- } |
-} |
-#endif |
- |
-/* =========================================================================== |
- Reads a long in LSB order from the given gz_stream. Sets z_err in case |
- of error. |
-*/ |
-local uLong getLong (s) |
- gz_stream *s; |
-{ |
- uLong x = (uLong)get_byte(s); |
- int c; |
- |
- x += ((uLong)get_byte(s))<<8; |
- x += ((uLong)get_byte(s))<<16; |
- c = get_byte(s); |
- if (c == EOF) s->z_err = Z_DATA_ERROR; |
- x += ((uLong)c)<<24; |
- return x; |
-} |
- |
-/* =========================================================================== |
- Flushes all pending output if necessary, closes the compressed file |
- and deallocates all the (de)compression state. |
-*/ |
-int ZEXPORT gzclose (file) |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL) return Z_STREAM_ERROR; |
- |
- if (s->mode == 'w') { |
-#ifdef NO_GZCOMPRESS |
- return Z_STREAM_ERROR; |
-#else |
- if (do_flush (file, Z_FINISH) != Z_OK) |
- return destroy((gz_stream*)file); |
- |
- putLong (s->file, s->crc); |
- putLong (s->file, (uLong)(s->in & 0xffffffff)); |
-#endif |
- } |
- return destroy((gz_stream*)file); |
-} |
- |
-// Google Gears modification: strerror is not present on WinCE. |
-#if defined(STDC) && !defined(_WIN32_WCE) |
-# define zstrerror(errnum) strerror(errnum) |
-#else |
-# define zstrerror(errnum) "" |
-#endif |
- |
-/* =========================================================================== |
- Returns the error message for the last error which occurred on the |
- given compressed file. errnum is set to zlib error number. If an |
- error occurred in the file system and not in the compression library, |
- errnum is set to Z_ERRNO and the application may consult errno |
- to get the exact error code. |
-*/ |
-const char * ZEXPORT gzerror (file, errnum) |
- gzFile file; |
- int *errnum; |
-{ |
- char *m; |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL) { |
- *errnum = Z_STREAM_ERROR; |
- return (const char*)ERR_MSG(Z_STREAM_ERROR); |
- } |
- *errnum = s->z_err; |
- if (*errnum == Z_OK) return (const char*)""; |
- |
- m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg); |
- |
- if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err); |
- |
- TRYFREE(s->msg); |
- s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3); |
- if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR); |
- strcpy(s->msg, s->path); |
- strcat(s->msg, ": "); |
- strcat(s->msg, m); |
- return (const char*)s->msg; |
-} |
- |
-/* =========================================================================== |
- Clear the error and end-of-file flags, and do the same for the real file. |
-*/ |
-void ZEXPORT gzclearerr (file) |
- gzFile file; |
-{ |
- gz_stream *s = (gz_stream*)file; |
- |
- if (s == NULL) return; |
- if (s->z_err != Z_STREAM_END) s->z_err = Z_OK; |
- s->z_eof = 0; |
- clearerr(s->file); |
-} |