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decompress_bunzip2: relieve register pressure in hot function read_bunzip

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function                                             old     new   delta
unpack_bz2_stream                                    318     329     +11
read_bunzip                                          268     262      -6

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko
2010-10-29 19:01:58 +02:00
parent bf3bec51fc
commit 1014a9adbf
2 changed files with 15 additions and 7 deletions
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2
include/unarchive.h
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@@ -194,6 +194,8 @@ extern const llist_t *find_list_entry2(const llist_t *list, const char *filename
/* A bit of bunzip2 internals are exposed for compressed help support: */
typedef struct bunzip_data bunzip_data;
int start_bunzip(bunzip_data **bdp, int in_fd, const void *inbuf, int len) FAST_FUNC;
/* NB: read_bunzip returns < 0 on error, or the number of *unfilled* bytes
* in outbuf. IOW: on EOF returns len ("all bytes are not filled"), not 0: */
int read_bunzip(bunzip_data *bd, char *outbuf, int len) FAST_FUNC;
void dealloc_bunzip(bunzip_data *bd) FAST_FUNC;