lib/zlib/zutil.c

   1 /* zutil.c -- target dependent utility functions for the compression library
   2  * Copyright (C) 1995-2005 Jean-loup Gailly.
   3  * For conditions of distribution and use, see copyright notice in zlib.h
   4  */
   5
   6 /* @(#) $Id$ */
   7
   8 #include "zutil.h"
   9
  10 #ifndef NO_DUMMY_DECL
  11 struct internal_state      {int dummy;}; /* for buggy compilers */
  12 #endif
  13
  14 const char * const z_errmsg[10] = {
  15 "need dictionary",     /* Z_NEED_DICT       2  */
  16 "stream end",          /* Z_STREAM_END      1  */
  17 "",                    /* Z_OK              0  */
  18 "file error",          /* Z_ERRNO         (-1) */
  19 "stream error",        /* Z_STREAM_ERROR  (-2) */
  20 "data error",          /* Z_DATA_ERROR    (-3) */
  21 "insufficient memory", /* Z_MEM_ERROR     (-4) */
  22 "buffer error",        /* Z_BUF_ERROR     (-5) */
  23 "incompatible version",/* Z_VERSION_ERROR (-6) */
  24 ""};
  25
  26 #ifdef DEBUG
  27
  28 #ifndef verbose
  29 #define verbose 0
  30 #endif
  31 int z_verbose = verbose;
  32
  33 void z_error (m)
  34     char *m;
  35 {
  36         fprintf(stderr, "%s\n", m);
  37         hang ();
  38 }
  39 #endif
  40
  41 /* exported to allow conversion of error code to string for compress() and
  42  * uncompress()
  43  */
  44 #ifndef MY_ZCALLOC /* Any system without a special alloc function */
  45
  46 #ifndef STDC
  47 extern voidp    malloc OF((uInt size));
  48 extern voidp    calloc OF((uInt items, uInt size));
  49 extern void     free   OF((voidpf ptr));
  50 #endif
  51
  52 voidpf zcalloc(voidpf opaque, unsigned items, unsigned size)
  53 {
  54         if (opaque)
  55                 items += size - size; /* make compiler happy */
  56         return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
  57                 (voidpf)calloc(items, size);
  58 }
  59
  60 void  zcfree(voidpf opaque, voidpf ptr, unsigned nb)
  61 {
  62         free(ptr);
  63         if (opaque)
  64                 return; /* make compiler happy */
  65 }
  66
  67 #endif /* MY_ZCALLOC */