zlib.c

   1 /*
   2  * zlib wrappers to make sure we don't silently miss errors
   3  * at init time.
   4  */
   5 #include "cache.h"
   6
   7 static const char *zerr_to_string(int status)
   8 {
   9         switch (status) {
  10         case Z_MEM_ERROR:
  11                 return "out of memory";
  12         case Z_VERSION_ERROR:
  13                 return "wrong version";
  14         case Z_NEED_DICT:
  15                 return "needs dictionary";
  16         case Z_DATA_ERROR:
  17                 return "data stream error";
  18         case Z_STREAM_ERROR:
  19                 return "stream consistency error";
  20         default:
  21                 return "unknown error";
  22         }
  23 }
  24
  25 void git_inflate_init(z_streamp strm)
  26 {
  27         int status = inflateInit(strm);
  28
  29         if (status == Z_OK)
  30                 return;
  31         die("inflateInit: %s (%s)", zerr_to_string(status),
  32             strm->msg ? strm->msg : "no message");
  33 }
  34
  35 void git_inflate_end(z_streamp strm)
  36 {
  37         int status = inflateEnd(strm);
  38
  39         if (status == Z_OK)
  40                 return;
  41         error("inflateEnd: %s (%s)", zerr_to_string(status),
  42               strm->msg ? strm->msg : "no message");
  43 }
  44
  45 int git_inflate(z_streamp strm, int flush)
  46 {
  47         int status = inflate(strm, flush);
  48
  49         switch (status) {
  50         /* Z_BUF_ERROR: normal, needs more space in the output buffer */
  51         case Z_BUF_ERROR:
  52         case Z_OK:
  53         case Z_STREAM_END:
  54                 return status;
  55
  56         case Z_MEM_ERROR:
  57                 die("inflate: out of memory");
  58         default:
  59                 break;
  60         }
  61         error("inflate: %s (%s)", zerr_to_string(status),
  62               strm->msg ? strm->msg : "no message");
  63         return status;
  64 }