gcc/testsuite/c-c++-common/analyzer/zlib-2.c

   1 typedef void * (*alloc_func)(void * opaque, unsigned items, unsigned size);
   2 typedef void (*free_func)(void * opaque, void * address);
   3
   4 typedef struct z_stream_s {
   5   char *msg;
   6   alloc_func zalloc;
   7   free_func zfree;
   8   void * opaque;
   9 } z_stream;
  10
  11 void * zcalloc(void * opaque, unsigned items, unsigned size);
  12 void zcfree(void * opaque, void * ptr);
  13
  14 int deflateInit2_(z_stream *strm, int level, int method, int windowBits,
  15                   int memLevel, int strategy, const char *version,
  16                   int stream_size) {
  17   int noheader = 0;
  18   static const char *my_version = "1.1.3";
  19
  20   if (version == 0 || version[0] != my_version[0] ||
  21       stream_size != sizeof(z_stream)) {
  22     return (-6);
  23   }
  24   if (strm == 0)
  25     return (-2);
  26
  27   strm->msg = 0;
  28   if (strm->zalloc == 0) {
  29     strm->zalloc = zcalloc;
  30     strm->opaque = (void *)0;
  31   }
  32   if (strm->zfree == 0)
  33     strm->zfree = zcfree;
  34
  35   if (level == (-1))
  36     level = 6;
  37
  38   if (windowBits < 0) {
  39     noheader = 1;
  40     windowBits = -windowBits;
  41   }
  42   if (memLevel < 1 || memLevel > 9 || method != 8 || windowBits < 8 ||
  43       windowBits > 15 || level < 0 || level > 9 || strategy < 0 ||
  44       strategy > 2) {
  45     return (-2);
  46   }
  47   (*((strm)->zalloc))((strm)->opaque, (1), 112);
  48   return 0;
  49 }