zlib123/gzio.c
author Ryan C. Gordon <icculus@icculus.org>
Mon, 23 Mar 2009 01:43:05 -0400
branchstable-1.0
changeset 966 816a83f04a27
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permissions -rw-r--r--
Updated version to 1.0.2 in configure.in ...
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/* gzio.c -- IO on .gz files
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 * Copyright (C) 1995-2005 Jean-loup Gailly.
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 * For conditions of distribution and use, see copyright notice in zlib.h
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 *
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 * Compile this file with -DNO_GZCOMPRESS to avoid the compression code.
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 */
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/* @(#) $Id$ */
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#include <stdio.h>
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#include "zutil.h"
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#ifdef NO_DEFLATE       /* for compatibility with old definition */
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#  define NO_GZCOMPRESS
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#endif
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#ifndef NO_DUMMY_DECL
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struct internal_state {int dummy;}; /* for buggy compilers */
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#endif
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#ifndef Z_BUFSIZE
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#  ifdef MAXSEG_64K
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#    define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
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#  else
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#    define Z_BUFSIZE 16384
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#  endif
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#endif
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#ifndef Z_PRINTF_BUFSIZE
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#  define Z_PRINTF_BUFSIZE 4096
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#endif
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#ifdef __MVS__
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#  pragma map (fdopen , "\174\174FDOPEN")
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   FILE *fdopen(int, const char *);
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#endif
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#ifndef STDC
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extern voidp  malloc OF((uInt size));
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extern void   free   OF((voidpf ptr));
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#endif
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#define ALLOC(size) malloc(size)
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#define TRYFREE(p) {if (p) free(p);}
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static int const gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
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/* gzip flag byte */
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#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
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#define HEAD_CRC     0x02 /* bit 1 set: header CRC present */
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#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
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#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
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#define COMMENT      0x10 /* bit 4 set: file comment present */
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#define RESERVED     0xE0 /* bits 5..7: reserved */
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typedef struct gz_stream {
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    z_stream stream;
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    int      z_err;   /* error code for last stream operation */
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    int      z_eof;   /* set if end of input file */
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    FILE     *file;   /* .gz file */
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    Byte     *inbuf;  /* input buffer */
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    Byte     *outbuf; /* output buffer */
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    uLong    crc;     /* crc32 of uncompressed data */
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    char     *msg;    /* error message */
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    char     *path;   /* path name for debugging only */
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    int      transparent; /* 1 if input file is not a .gz file */
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    char     mode;    /* 'w' or 'r' */
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    z_off_t  start;   /* start of compressed data in file (header skipped) */
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    z_off_t  in;      /* bytes into deflate or inflate */
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    z_off_t  out;     /* bytes out of deflate or inflate */
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    int      back;    /* one character push-back */
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    int      last;    /* true if push-back is last character */
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} gz_stream;
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local gzFile gz_open      OF((const char *path, const char *mode, int  fd));
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local int do_flush        OF((gzFile file, int flush));
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local int    get_byte     OF((gz_stream *s));
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local void   check_header OF((gz_stream *s));
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local int    destroy      OF((gz_stream *s));
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local void   putLong      OF((FILE *file, uLong x));
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local uLong  getLong      OF((gz_stream *s));
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/* ===========================================================================
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     Opens a gzip (.gz) file for reading or writing. The mode parameter
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   is as in fopen ("rb" or "wb"). The file is given either by file descriptor
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   or path name (if fd == -1).
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     gz_open returns NULL if the file could not be opened or if there was
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   insufficient memory to allocate the (de)compression state; errno
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   can be checked to distinguish the two cases (if errno is zero, the
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   zlib error is Z_MEM_ERROR).
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*/
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local gzFile gz_open (path, mode, fd)
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    const char *path;
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    const char *mode;
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    int  fd;
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{
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    int err;
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    int level = Z_DEFAULT_COMPRESSION; /* compression level */
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    int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
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    char *p = (char*)mode;
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    gz_stream *s;
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    char fmode[80]; /* copy of mode, without the compression level */
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    char *m = fmode;
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    if (!path || !mode) return Z_NULL;
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    s = (gz_stream *)ALLOC(sizeof(gz_stream));
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    if (!s) return Z_NULL;
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    s->stream.zalloc = (alloc_func)0;
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    s->stream.zfree = (free_func)0;
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    s->stream.opaque = (voidpf)0;
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    s->stream.next_in = s->inbuf = Z_NULL;
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    s->stream.next_out = s->outbuf = Z_NULL;
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    s->stream.avail_in = s->stream.avail_out = 0;
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    s->file = NULL;
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    s->z_err = Z_OK;
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    s->z_eof = 0;
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    s->in = 0;
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    s->out = 0;
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    s->back = EOF;
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    s->crc = crc32(0L, Z_NULL, 0);
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    s->msg = NULL;
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    s->transparent = 0;
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    s->path = (char*)ALLOC(strlen(path)+1);
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    if (s->path == NULL) {
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diff changeset
   129
        return destroy(s), (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
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parents:
diff changeset
   130
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   131
    strcpy(s->path, path); /* do this early for debugging */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   132
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   133
    s->mode = '\0';
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   134
    do {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   135
        if (*p == 'r') s->mode = 'r';
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   136
        if (*p == 'w' || *p == 'a') s->mode = 'w';
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   137
        if (*p >= '0' && *p <= '9') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   138
            level = *p - '0';
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   139
        } else if (*p == 'f') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   140
          strategy = Z_FILTERED;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   141
        } else if (*p == 'h') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   142
          strategy = Z_HUFFMAN_ONLY;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   143
        } else if (*p == 'R') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   144
          strategy = Z_RLE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   145
        } else {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   146
            *m++ = *p; /* copy the mode */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   147
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   148
    } while (*p++ && m != fmode + sizeof(fmode));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   149
    if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
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parents:
diff changeset
   150
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   151
    if (s->mode == 'w') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   152
#ifdef NO_GZCOMPRESS
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   153
        err = Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   154
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   155
        err = deflateInit2(&(s->stream), level,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   156
                           Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   157
        /* windowBits is passed < 0 to suppress zlib header */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   158
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   159
        s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   160
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   161
        if (err != Z_OK || s->outbuf == Z_NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   162
            return destroy(s), (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   163
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   164
    } else {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   165
        s->stream.next_in  = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   166
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   167
        err = inflateInit2(&(s->stream), -MAX_WBITS);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   168
        /* windowBits is passed < 0 to tell that there is no zlib header.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   169
         * Note that in this case inflate *requires* an extra "dummy" byte
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   170
         * after the compressed stream in order to complete decompression and
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   171
         * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   172
         * present after the compressed stream.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   173
         */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   174
        if (err != Z_OK || s->inbuf == Z_NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   175
            return destroy(s), (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   176
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   177
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   178
    s->stream.avail_out = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   179
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   180
    errno = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   181
    s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   182
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   183
    if (s->file == NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   184
        return destroy(s), (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   185
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   186
    if (s->mode == 'w') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   187
        /* Write a very simple .gz header:
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   188
         */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   189
        fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   190
             Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   191
        s->start = 10L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   192
        /* We use 10L instead of ftell(s->file) to because ftell causes an
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   193
         * fflush on some systems. This version of the library doesn't use
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   194
         * start anyway in write mode, so this initialization is not
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   195
         * necessary.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   196
         */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   197
    } else {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   198
        check_header(s); /* skip the .gz header */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   199
        s->start = ftell(s->file) - s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   200
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   201
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   202
    return (gzFile)s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   203
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   204
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   205
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   206
     Opens a gzip (.gz) file for reading or writing.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   207
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   208
gzFile ZEXPORT gzopen (path, mode)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   209
    const char *path;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   210
    const char *mode;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   211
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   212
    return gz_open (path, mode, -1);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   213
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   214
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   215
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   216
     Associate a gzFile with the file descriptor fd. fd is not dup'ed here
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   217
   to mimic the behavio(u)r of fdopen.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   218
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   219
gzFile ZEXPORT gzdopen (fd, mode)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   220
    int fd;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   221
    const char *mode;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   222
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   223
    char name[46];      /* allow for up to 128-bit integers */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   224
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   225
    if (fd < 0) return (gzFile)Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   226
    sprintf(name, "<fd:%d>", fd); /* for debugging */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   227
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   228
    return gz_open (name, mode, fd);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   229
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   230
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   231
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   232
 * Update the compression level and strategy
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   233
 */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   234
int ZEXPORT gzsetparams (file, level, strategy)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   235
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   236
    int level;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   237
    int strategy;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   238
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   239
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   240
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   241
    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   242
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   243
    /* Make room to allow flushing */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   244
    if (s->stream.avail_out == 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   245
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   246
        s->stream.next_out = s->outbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   247
        if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   248
            s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   249
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   250
        s->stream.avail_out = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   251
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   252
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   253
    return deflateParams (&(s->stream), level, strategy);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   254
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   255
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   256
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   257
     Read a byte from a gz_stream; update next_in and avail_in. Return EOF
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   258
   for end of file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   259
   IN assertion: the stream s has been sucessfully opened for reading.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   260
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   261
local int get_byte(s)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   262
    gz_stream *s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   263
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   264
    if (s->z_eof) return EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   265
    if (s->stream.avail_in == 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   266
        errno = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   267
        s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   268
        if (s->stream.avail_in == 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   269
            s->z_eof = 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   270
            if (ferror(s->file)) s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   271
            return EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   272
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   273
        s->stream.next_in = s->inbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   274
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   275
    s->stream.avail_in--;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   276
    return *(s->stream.next_in)++;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   277
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   278
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   279
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   280
      Check the gzip header of a gz_stream opened for reading. Set the stream
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   281
    mode to transparent if the gzip magic header is not present; set s->err
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   282
    to Z_DATA_ERROR if the magic header is present but the rest of the header
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   283
    is incorrect.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   284
    IN assertion: the stream s has already been created sucessfully;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   285
       s->stream.avail_in is zero for the first time, but may be non-zero
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   286
       for concatenated .gz files.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   287
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   288
local void check_header(s)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   289
    gz_stream *s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   290
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   291
    int method; /* method byte */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   292
    int flags;  /* flags byte */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   293
    uInt len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   294
    int c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   295
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   296
    /* Assure two bytes in the buffer so we can peek ahead -- handle case
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   297
       where first byte of header is at the end of the buffer after the last
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   298
       gzip segment */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   299
    len = s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   300
    if (len < 2) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   301
        if (len) s->inbuf[0] = s->stream.next_in[0];
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   302
        errno = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   303
        len = (uInt)fread(s->inbuf + len, 1, Z_BUFSIZE >> len, s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   304
        if (len == 0 && ferror(s->file)) s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   305
        s->stream.avail_in += len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   306
        s->stream.next_in = s->inbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   307
        if (s->stream.avail_in < 2) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   308
            s->transparent = s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   309
            return;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   310
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   311
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   312
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   313
    /* Peek ahead to check the gzip magic header */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   314
    if (s->stream.next_in[0] != gz_magic[0] ||
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   315
        s->stream.next_in[1] != gz_magic[1]) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   316
        s->transparent = 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   317
        return;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   318
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   319
    s->stream.avail_in -= 2;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   320
    s->stream.next_in += 2;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   321
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   322
    /* Check the rest of the gzip header */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   323
    method = get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   324
    flags = get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   325
    if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   326
        s->z_err = Z_DATA_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   327
        return;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   328
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   329
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   330
    /* Discard time, xflags and OS code: */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   331
    for (len = 0; len < 6; len++) (void)get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   332
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   333
    if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   334
        len  =  (uInt)get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   335
        len += ((uInt)get_byte(s))<<8;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   336
        /* len is garbage if EOF but the loop below will quit anyway */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   337
        while (len-- != 0 && get_byte(s) != EOF) ;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   338
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   339
    if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   340
        while ((c = get_byte(s)) != 0 && c != EOF) ;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   341
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   342
    if ((flags & COMMENT) != 0) {   /* skip the .gz file comment */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   343
        while ((c = get_byte(s)) != 0 && c != EOF) ;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   344
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   345
    if ((flags & HEAD_CRC) != 0) {  /* skip the header crc */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   346
        for (len = 0; len < 2; len++) (void)get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   347
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   348
    s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   349
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   350
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   351
 /* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   352
 * Cleanup then free the given gz_stream. Return a zlib error code.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   353
   Try freeing in the reverse order of allocations.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   354
 */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   355
local int destroy (s)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   356
    gz_stream *s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   357
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   358
    int err = Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   359
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   360
    if (!s) return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   361
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   362
    TRYFREE(s->msg);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   363
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   364
    if (s->stream.state != NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   365
        if (s->mode == 'w') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   366
#ifdef NO_GZCOMPRESS
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   367
            err = Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   368
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   369
            err = deflateEnd(&(s->stream));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   370
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   371
        } else if (s->mode == 'r') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   372
            err = inflateEnd(&(s->stream));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   373
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   374
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   375
    if (s->file != NULL && fclose(s->file)) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   376
#ifdef ESPIPE
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   377
        if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   378
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   379
            err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   380
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   381
    if (s->z_err < 0) err = s->z_err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   382
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   383
    TRYFREE(s->inbuf);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   384
    TRYFREE(s->outbuf);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   385
    TRYFREE(s->path);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   386
    TRYFREE(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   387
    return err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   388
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   389
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   390
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   391
     Reads the given number of uncompressed bytes from the compressed file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   392
   gzread returns the number of bytes actually read (0 for end of file).
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   393
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   394
int ZEXPORT gzread (file, buf, len)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   395
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   396
    voidp buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   397
    unsigned len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   398
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   399
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   400
    Bytef *start = (Bytef*)buf; /* starting point for crc computation */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   401
    Byte  *next_out; /* == stream.next_out but not forced far (for MSDOS) */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   402
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   403
    if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   404
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   405
    if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   406
    if (s->z_err == Z_STREAM_END) return 0;  /* EOF */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   407
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   408
    next_out = (Byte*)buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   409
    s->stream.next_out = (Bytef*)buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   410
    s->stream.avail_out = len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   411
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   412
    if (s->stream.avail_out && s->back != EOF) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   413
        *next_out++ = s->back;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   414
        s->stream.next_out++;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   415
        s->stream.avail_out--;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   416
        s->back = EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   417
        s->out++;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   418
        start++;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   419
        if (s->last) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   420
            s->z_err = Z_STREAM_END;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   421
            return 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   422
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   423
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   424
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   425
    while (s->stream.avail_out != 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   426
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   427
        if (s->transparent) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   428
            /* Copy first the lookahead bytes: */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   429
            uInt n = s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   430
            if (n > s->stream.avail_out) n = s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   431
            if (n > 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   432
                zmemcpy(s->stream.next_out, s->stream.next_in, n);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   433
                next_out += n;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   434
                s->stream.next_out = next_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   435
                s->stream.next_in   += n;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   436
                s->stream.avail_out -= n;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   437
                s->stream.avail_in  -= n;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   438
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   439
            if (s->stream.avail_out > 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   440
                s->stream.avail_out -=
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   441
                    (uInt)fread(next_out, 1, s->stream.avail_out, s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   442
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   443
            len -= s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   444
            s->in  += len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   445
            s->out += len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   446
            if (len == 0) s->z_eof = 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   447
            return (int)len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   448
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   449
        if (s->stream.avail_in == 0 && !s->z_eof) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   450
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   451
            errno = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   452
            s->stream.avail_in = (uInt)fread(s->inbuf, 1, Z_BUFSIZE, s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   453
            if (s->stream.avail_in == 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   454
                s->z_eof = 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   455
                if (ferror(s->file)) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   456
                    s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   457
                    break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   458
                }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   459
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   460
            s->stream.next_in = s->inbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   461
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   462
        s->in += s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   463
        s->out += s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   464
        s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   465
        s->in -= s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   466
        s->out -= s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   467
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   468
        if (s->z_err == Z_STREAM_END) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   469
            /* Check CRC and original size */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   470
            s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   471
            start = s->stream.next_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   472
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   473
            if (getLong(s) != s->crc) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   474
                s->z_err = Z_DATA_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   475
            } else {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   476
                (void)getLong(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   477
                /* The uncompressed length returned by above getlong() may be
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   478
                 * different from s->out in case of concatenated .gz files.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   479
                 * Check for such files:
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   480
                 */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   481
                check_header(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   482
                if (s->z_err == Z_OK) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   483
                    inflateReset(&(s->stream));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   484
                    s->crc = crc32(0L, Z_NULL, 0);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   485
                }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   486
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   487
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   488
        if (s->z_err != Z_OK || s->z_eof) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   489
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   490
    s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   491
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   492
    if (len == s->stream.avail_out &&
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   493
        (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO))
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   494
        return -1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   495
    return (int)(len - s->stream.avail_out);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   496
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   497
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   498
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   499
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   500
      Reads one byte from the compressed file. gzgetc returns this byte
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   501
   or -1 in case of end of file or error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   502
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   503
int ZEXPORT gzgetc(file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   504
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   505
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   506
    unsigned char c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   507
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   508
    return gzread(file, &c, 1) == 1 ? c : -1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   509
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   510
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   511
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   512
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   513
      Push one byte back onto the stream.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   514
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   515
int ZEXPORT gzungetc(c, file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   516
    int c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   517
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   518
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   519
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   520
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   521
    if (s == NULL || s->mode != 'r' || c == EOF || s->back != EOF) return EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   522
    s->back = c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   523
    s->out--;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   524
    s->last = (s->z_err == Z_STREAM_END);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   525
    if (s->last) s->z_err = Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   526
    s->z_eof = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   527
    return c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   528
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   529
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   530
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   531
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   532
      Reads bytes from the compressed file until len-1 characters are
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   533
   read, or a newline character is read and transferred to buf, or an
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   534
   end-of-file condition is encountered.  The string is then terminated
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   535
   with a null character.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   536
      gzgets returns buf, or Z_NULL in case of error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   537
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   538
      The current implementation is not optimized at all.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   539
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   540
char * ZEXPORT gzgets(file, buf, len)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   541
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   542
    char *buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   543
    int len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   544
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   545
    char *b = buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   546
    if (buf == Z_NULL || len <= 0) return Z_NULL;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   547
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   548
    while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   549
    *buf = '\0';
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   550
    return b == buf && len > 0 ? Z_NULL : b;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   551
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   552
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   553
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   554
#ifndef NO_GZCOMPRESS
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   555
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   556
     Writes the given number of uncompressed bytes into the compressed file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   557
   gzwrite returns the number of bytes actually written (0 in case of error).
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   558
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   559
int ZEXPORT gzwrite (file, buf, len)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   560
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   561
    voidpc buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   562
    unsigned len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   563
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   564
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   565
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   566
    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   567
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   568
    s->stream.next_in = (Bytef*)buf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   569
    s->stream.avail_in = len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   570
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   571
    while (s->stream.avail_in != 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   572
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   573
        if (s->stream.avail_out == 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   574
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   575
            s->stream.next_out = s->outbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   576
            if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   577
                s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   578
                break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   579
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   580
            s->stream.avail_out = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   581
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   582
        s->in += s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   583
        s->out += s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   584
        s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   585
        s->in -= s->stream.avail_in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   586
        s->out -= s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   587
        if (s->z_err != Z_OK) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   588
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   589
    s->crc = crc32(s->crc, (const Bytef *)buf, len);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   590
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   591
    return (int)(len - s->stream.avail_in);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   592
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   593
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   594
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   595
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   596
     Converts, formats, and writes the args to the compressed file under
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   597
   control of the format string, as in fprintf. gzprintf returns the number of
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   598
   uncompressed bytes actually written (0 in case of error).
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   599
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   600
#ifdef STDC
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   601
#include <stdarg.h>
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   602
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   603
int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   604
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   605
    char buf[Z_PRINTF_BUFSIZE];
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   606
    va_list va;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   607
    int len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   608
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   609
    buf[sizeof(buf) - 1] = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   610
    va_start(va, format);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   611
#ifdef NO_vsnprintf
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   612
#  ifdef HAS_vsprintf_void
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   613
    (void)vsprintf(buf, format, va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   614
    va_end(va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   615
    for (len = 0; len < sizeof(buf); len++)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   616
        if (buf[len] == 0) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   617
#  else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   618
    len = vsprintf(buf, format, va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   619
    va_end(va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   620
#  endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   621
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   622
#  ifdef HAS_vsnprintf_void
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   623
    (void)vsnprintf(buf, sizeof(buf), format, va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   624
    va_end(va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   625
    len = strlen(buf);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   626
#  else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   627
    len = vsnprintf(buf, sizeof(buf), format, va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   628
    va_end(va);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   629
#  endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   630
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   631
    if (len <= 0 || len >= (int)sizeof(buf) || buf[sizeof(buf) - 1] != 0)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   632
        return 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   633
    return gzwrite(file, buf, (unsigned)len);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   634
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   635
#else /* not ANSI C */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   636
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   637
int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   638
                       a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   639
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   640
    const char *format;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   641
    int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   642
        a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   643
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   644
    char buf[Z_PRINTF_BUFSIZE];
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   645
    int len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   646
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   647
    buf[sizeof(buf) - 1] = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   648
#ifdef NO_snprintf
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   649
#  ifdef HAS_sprintf_void
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   650
    sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   651
            a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   652
    for (len = 0; len < sizeof(buf); len++)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   653
        if (buf[len] == 0) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   654
#  else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   655
    len = sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   656
                a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   657
#  endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   658
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   659
#  ifdef HAS_snprintf_void
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   660
    snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   661
             a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   662
    len = strlen(buf);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   663
#  else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   664
    len = snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   665
                 a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   666
#  endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   667
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   668
    if (len <= 0 || len >= sizeof(buf) || buf[sizeof(buf) - 1] != 0)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   669
        return 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   670
    return gzwrite(file, buf, len);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   671
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   672
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   673
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   674
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   675
      Writes c, converted to an unsigned char, into the compressed file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   676
   gzputc returns the value that was written, or -1 in case of error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   677
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   678
int ZEXPORT gzputc(file, c)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   679
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   680
    int c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   681
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   682
    unsigned char cc = (unsigned char) c; /* required for big endian systems */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   683
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   684
    return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   685
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   686
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   687
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   688
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   689
      Writes the given null-terminated string to the compressed file, excluding
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   690
   the terminating null character.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   691
      gzputs returns the number of characters written, or -1 in case of error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   692
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   693
int ZEXPORT gzputs(file, s)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   694
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   695
    const char *s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   696
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   697
    return gzwrite(file, (char*)s, (unsigned)strlen(s));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   698
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   699
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   700
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   701
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   702
     Flushes all pending output into the compressed file. The parameter
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   703
   flush is as in the deflate() function.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   704
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   705
local int do_flush (file, flush)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   706
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   707
    int flush;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   708
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   709
    uInt len;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   710
    int done = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   711
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   712
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   713
    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   714
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   715
    s->stream.avail_in = 0; /* should be zero already anyway */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   716
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   717
    for (;;) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   718
        len = Z_BUFSIZE - s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   719
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   720
        if (len != 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   721
            if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   722
                s->z_err = Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   723
                return Z_ERRNO;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   724
            }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   725
            s->stream.next_out = s->outbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   726
            s->stream.avail_out = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   727
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   728
        if (done) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   729
        s->out += s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   730
        s->z_err = deflate(&(s->stream), flush);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   731
        s->out -= s->stream.avail_out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   732
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   733
        /* Ignore the second of two consecutive flushes: */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   734
        if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   735
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   736
        /* deflate has finished flushing only when it hasn't used up
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   737
         * all the available space in the output buffer:
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   738
         */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   739
        done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   740
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   741
        if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   742
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   743
    return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   744
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   745
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   746
int ZEXPORT gzflush (file, flush)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   747
     gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   748
     int flush;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   749
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   750
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   751
    int err = do_flush (file, flush);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   752
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   753
    if (err) return err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   754
    fflush(s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   755
    return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   756
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   757
#endif /* NO_GZCOMPRESS */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   758
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   759
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   760
      Sets the starting position for the next gzread or gzwrite on the given
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   761
   compressed file. The offset represents a number of bytes in the
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   762
      gzseek returns the resulting offset location as measured in bytes from
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   763
   the beginning of the uncompressed stream, or -1 in case of error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   764
      SEEK_END is not implemented, returns error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   765
      In this version of the library, gzseek can be extremely slow.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   766
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   767
z_off_t ZEXPORT gzseek (file, offset, whence)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   768
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   769
    z_off_t offset;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   770
    int whence;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   771
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   772
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   773
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   774
    if (s == NULL || whence == SEEK_END ||
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   775
        s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   776
        return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   777
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   778
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   779
    if (s->mode == 'w') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   780
#ifdef NO_GZCOMPRESS
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   781
        return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   782
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   783
        if (whence == SEEK_SET) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   784
            offset -= s->in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   785
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   786
        if (offset < 0) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   787
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   788
        /* At this point, offset is the number of zero bytes to write. */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   789
        if (s->inbuf == Z_NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   790
            s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   791
            if (s->inbuf == Z_NULL) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   792
            zmemzero(s->inbuf, Z_BUFSIZE);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   793
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   794
        while (offset > 0)  {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   795
            uInt size = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   796
            if (offset < Z_BUFSIZE) size = (uInt)offset;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   797
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   798
            size = gzwrite(file, s->inbuf, size);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   799
            if (size == 0) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   800
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   801
            offset -= size;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   802
        }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   803
        return s->in;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   804
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   805
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   806
    /* Rest of function is for reading only */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   807
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   808
    /* compute absolute position */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   809
    if (whence == SEEK_CUR) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   810
        offset += s->out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   811
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   812
    if (offset < 0) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   813
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   814
    if (s->transparent) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   815
        /* map to fseek */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   816
        s->back = EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   817
        s->stream.avail_in = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   818
        s->stream.next_in = s->inbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   819
        if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   820
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   821
        s->in = s->out = offset;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   822
        return offset;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   823
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   824
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   825
    /* For a negative seek, rewind and use positive seek */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   826
    if (offset >= s->out) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   827
        offset -= s->out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   828
    } else if (gzrewind(file) < 0) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   829
        return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   830
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   831
    /* offset is now the number of bytes to skip. */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   832
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   833
    if (offset != 0 && s->outbuf == Z_NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   834
        s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   835
        if (s->outbuf == Z_NULL) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   836
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   837
    if (offset && s->back != EOF) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   838
        s->back = EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   839
        s->out++;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   840
        offset--;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   841
        if (s->last) s->z_err = Z_STREAM_END;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   842
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   843
    while (offset > 0)  {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   844
        int size = Z_BUFSIZE;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   845
        if (offset < Z_BUFSIZE) size = (int)offset;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   846
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   847
        size = gzread(file, s->outbuf, (uInt)size);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   848
        if (size <= 0) return -1L;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   849
        offset -= size;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   850
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   851
    return s->out;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   852
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   853
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   854
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   855
     Rewinds input file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   856
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   857
int ZEXPORT gzrewind (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   858
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   859
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   860
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   861
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   862
    if (s == NULL || s->mode != 'r') return -1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   863
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   864
    s->z_err = Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   865
    s->z_eof = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   866
    s->back = EOF;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   867
    s->stream.avail_in = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   868
    s->stream.next_in = s->inbuf;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   869
    s->crc = crc32(0L, Z_NULL, 0);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   870
    if (!s->transparent) (void)inflateReset(&s->stream);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   871
    s->in = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   872
    s->out = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   873
    return fseek(s->file, s->start, SEEK_SET);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   874
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   875
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   876
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   877
     Returns the starting position for the next gzread or gzwrite on the
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   878
   given compressed file. This position represents a number of bytes in the
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   879
   uncompressed data stream.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   880
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   881
z_off_t ZEXPORT gztell (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   882
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   883
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   884
    return gzseek(file, 0L, SEEK_CUR);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   885
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   886
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   887
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   888
     Returns 1 when EOF has previously been detected reading the given
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   889
   input stream, otherwise zero.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   890
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   891
int ZEXPORT gzeof (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   892
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   893
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   894
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   895
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   896
    /* With concatenated compressed files that can have embedded
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   897
     * crc trailers, z_eof is no longer the only/best indicator of EOF
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   898
     * on a gz_stream. Handle end-of-stream error explicitly here.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   899
     */
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   900
    if (s == NULL || s->mode != 'r') return 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   901
    if (s->z_eof) return 1;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   902
    return s->z_err == Z_STREAM_END;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   903
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   904
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   905
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   906
     Returns 1 if reading and doing so transparently, otherwise zero.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   907
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   908
int ZEXPORT gzdirect (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   909
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   910
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   911
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   912
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   913
    if (s == NULL || s->mode != 'r') return 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   914
    return s->transparent;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   915
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   916
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   917
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   918
   Outputs a long in LSB order to the given file
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   919
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   920
local void putLong (file, x)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   921
    FILE *file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   922
    uLong x;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   923
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   924
    int n;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   925
    for (n = 0; n < 4; n++) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   926
        fputc((int)(x & 0xff), file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   927
        x >>= 8;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   928
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   929
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   930
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   931
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   932
   Reads a long in LSB order from the given gz_stream. Sets z_err in case
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   933
   of error.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   934
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   935
local uLong getLong (s)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   936
    gz_stream *s;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   937
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   938
    uLong x = (uLong)get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   939
    int c;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   940
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   941
    x += ((uLong)get_byte(s))<<8;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   942
    x += ((uLong)get_byte(s))<<16;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   943
    c = get_byte(s);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   944
    if (c == EOF) s->z_err = Z_DATA_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   945
    x += ((uLong)c)<<24;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   946
    return x;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   947
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   948
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   949
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   950
     Flushes all pending output if necessary, closes the compressed file
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   951
   and deallocates all the (de)compression state.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   952
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   953
int ZEXPORT gzclose (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   954
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   955
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   956
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   957
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   958
    if (s == NULL) return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   959
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   960
    if (s->mode == 'w') {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   961
#ifdef NO_GZCOMPRESS
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   962
        return Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   963
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   964
        if (do_flush (file, Z_FINISH) != Z_OK)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   965
            return destroy((gz_stream*)file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   966
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   967
        putLong (s->file, s->crc);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   968
        putLong (s->file, (uLong)(s->in & 0xffffffff));
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   969
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   970
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   971
    return destroy((gz_stream*)file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   972
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   973
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   974
#ifdef STDC
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   975
#  define zstrerror(errnum) strerror(errnum)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   976
#else
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   977
#  define zstrerror(errnum) ""
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   978
#endif
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   979
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   980
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   981
     Returns the error message for the last error which occurred on the
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   982
   given compressed file. errnum is set to zlib error number. If an
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   983
   error occurred in the file system and not in the compression library,
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   984
   errnum is set to Z_ERRNO and the application may consult errno
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   985
   to get the exact error code.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   986
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   987
const char * ZEXPORT gzerror (file, errnum)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   988
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   989
    int *errnum;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   990
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   991
    char *m;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   992
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   993
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   994
    if (s == NULL) {
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   995
        *errnum = Z_STREAM_ERROR;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   996
        return (const char*)ERR_MSG(Z_STREAM_ERROR);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   997
    }
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   998
    *errnum = s->z_err;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   999
    if (*errnum == Z_OK) return (const char*)"";
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1000
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1001
    m = (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1002
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1003
    if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1004
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1005
    TRYFREE(s->msg);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1006
    s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1007
    if (s->msg == Z_NULL) return (const char*)ERR_MSG(Z_MEM_ERROR);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1008
    strcpy(s->msg, s->path);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1009
    strcat(s->msg, ": ");
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1010
    strcat(s->msg, m);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1011
    return (const char*)s->msg;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1012
}
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1013
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1014
/* ===========================================================================
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1015
     Clear the error and end-of-file flags, and do the same for the real file.
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1016
*/
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1017
void ZEXPORT gzclearerr (file)
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1018
    gzFile file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1019
{
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1020
    gz_stream *s = (gz_stream*)file;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1021
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1022
    if (s == NULL) return;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1023
    if (s->z_err != Z_STREAM_END) s->z_err = Z_OK;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1024
    s->z_eof = 0;
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1025
    clearerr(s->file);
7b4677a8de6e Moved to zlib 1.2.3 proper.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
  1026
}