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zlib wrapper: refactor error message formatter

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Before refactoring the main part of the wrappers, first move the
logic to convert error status that come back from zlib to string
to a helper function.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-06-10 10:31:34 -07:00
parent e5af0de202
commit 1a507fc112
1 changed files with 39 additions and 36 deletions
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75
zlib.c
View file

@ -4,58 +4,61 @@
*/
#include "cache.h"
static const char *zerr_to_string(int status)
{
switch (status) {
case Z_MEM_ERROR:
return "out of memory";
case Z_VERSION_ERROR:
return "wrong version";
case Z_NEED_DICT:
return "needs dictionary";
case Z_DATA_ERROR:
return "data stream error";
case Z_STREAM_ERROR:
return "stream consistency error";
default:
return "unknown error";
}
}
void git_inflate_init(z_streamp strm)
{
const char *err;
int status = inflateInit(strm);
switch (inflateInit(strm)) {
case Z_OK:
if (status == Z_OK)
return;
case Z_MEM_ERROR:
err = "out of memory";
break;
case Z_VERSION_ERROR:
err = "wrong version";
break;
default:
err = "error";
}
die("inflateInit: %s (%s)", err, strm->msg ? strm->msg : "no message");
die("inflateInit: %s (%s)", zerr_to_string(status),
strm->msg ? strm->msg : "no message");
}
void git_inflate_end(z_streamp strm)
{
if (inflateEnd(strm) != Z_OK)
error("inflateEnd: %s", strm->msg ? strm->msg : "failed");
int status = inflateEnd(strm);
if (status == Z_OK)
return;
error("inflateEnd: %s (%s)", zerr_to_string(status),
strm->msg ? strm->msg : "no message");
}
int git_inflate(z_streamp strm, int flush)
{
int ret = inflate(strm, flush);
const char *err;
switch (ret) {
/* Out of memory is fatal. */
case Z_MEM_ERROR:
die("inflate: out of memory");
/* Data corruption errors: we may want to recover from them (fsck) */
case Z_NEED_DICT:
err = "needs dictionary"; break;
case Z_DATA_ERROR:
err = "data stream error"; break;
case Z_STREAM_ERROR:
err = "stream consistency error"; break;
default:
err = "unknown error"; break;
int status = inflate(strm, flush);
switch (status) {
/* Z_BUF_ERROR: normal, needs more space in the output buffer */
case Z_BUF_ERROR:
case Z_OK:
case Z_STREAM_END:
return ret;
return status;
case Z_MEM_ERROR:
die("inflate: out of memory");
default:
break;
}
error("inflate: %s (%s)", err, strm->msg ? strm->msg : "no message");
return ret;
error("inflate: %s (%s)", zerr_to_string(status),
strm->msg ? strm->msg : "no message");
return status;
}