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 #ifdef __UBOOT__
  47 #include <malloc.h>
  48 #else
  49 #ifndef STDC
  50 extern voidp    malloc OF((uInt size));
  51 extern voidp    calloc OF((uInt items, uInt size));
  52 extern void     free   OF((voidpf ptr));
  53 #endif
  54 #endif
  55
  56 voidpf zcalloc(voidpf opaque, unsigned items, unsigned size)
  57 {
  58         if (opaque)
  59                 items += size - size; /* make compiler happy */
  60         return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
  61                 (voidpf)calloc(items, size);
  62 }
  63
  64 void  zcfree(voidpf opaque, voidpf ptr, unsigned nb)
  65 {
  66         free(ptr);
  67         if (opaque)
  68                 return; /* make compiler happy */
  69 }
  70
  71 #endif /* MY_ZCALLOC */