b613cbd75085384df2ec87fcf2475f7d154f55ff
1/*
2 * zlib wrappers to make sure we don't silently miss errors
3 * at init time.
4 */
5#include "cache.h"
6
7static 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
25void 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
35void git_inflate_init_gzip_only(z_streamp strm)
36{
37 /*
38 * Use default 15 bits, +16 is to accept only gzip and to
39 * yield Z_DATA_ERROR when fed zlib format.
40 */
41 const int windowBits = 15 + 16;
42 int status = inflateInit2(strm, windowBits);
43
44 if (status == Z_OK)
45 return;
46 die("inflateInit2: %s (%s)", zerr_to_string(status),
47 strm->msg ? strm->msg : "no message");
48}
49
50void git_inflate_end(z_streamp strm)
51{
52 int status = inflateEnd(strm);
53
54 if (status == Z_OK)
55 return;
56 error("inflateEnd: %s (%s)", zerr_to_string(status),
57 strm->msg ? strm->msg : "no message");
58}
59
60int git_inflate(z_streamp strm, int flush)
61{
62 int status = inflate(strm, flush);
63
64 switch (status) {
65 /* Z_BUF_ERROR: normal, needs more space in the output buffer */
66 case Z_BUF_ERROR:
67 case Z_OK:
68 case Z_STREAM_END:
69 return status;
70
71 case Z_MEM_ERROR:
72 die("inflate: out of memory");
73 default:
74 break;
75 }
76 error("inflate: %s (%s)", zerr_to_string(status),
77 strm->msg ? strm->msg : "no message");
78 return status;
79}