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bbunzip: size optimization: ~90 bytes

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This commit is contained in:
Denis Vlasenko
2007-03-09 20:49:55 +00:00
parent f25d57e0b4
commit bebbd8c9ba
2 changed files with 21 additions and 22 deletions
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35
archival/bbunzip.c
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@ -127,13 +127,11 @@ int unpack(char **argv,
return exitcode;
}
#if ENABLE_BUNZIP2
static
char* make_new_name_bunzip2(char *filename)
char* make_new_name_generic(char *filename, const char *expected_ext)
{
char *extension = strrchr(filename, '.');
if (!extension || strcmp(extension, ".bz2") != 0) {
if (!extension || strcmp(extension + 1, expected_ext) != 0) {
/* Mimic GNU gunzip - "real" bunzip2 tries to */
/* unpack file anyway, to file.out */
return NULL;
@ -142,6 +140,14 @@ char* make_new_name_bunzip2(char *filename)
return filename;
}
#if ENABLE_BUNZIP2
static
char* make_new_name_bunzip2(char *filename)
{
return make_new_name_generic(filename, "bz2");
}
static
USE_DESKTOP(long long) int unpack_bunzip2(void)
{
@ -200,13 +206,14 @@ char* make_new_name_gunzip(char *filename)
if (!extension)
return NULL;
if (strcmp(extension, ".gz") == 0
extension++;
if (strcmp(extension, "tgz" + 1) == 0
#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
|| strcmp(extension, ".Z") == 0
|| strcmp(extension, "Z") == 0
#endif
) {
*extension = '\0';
} else if(strcmp(extension, ".tgz") == 0) {
extension[-1] = '\0';
} else if(strcmp(extension, "tgz") == 0) {
filename = xstrdup(filename);
extension = strrchr(filename, '.');
extension[2] = 'a';
@ -275,11 +282,7 @@ int gunzip_main(int argc, char **argv)
static
char* make_new_name_unlzma(char *filename)
{
char *extension = strrchr(filename, '.');
if (!extension || strcmp(extension, ".lzma") != 0)
return NULL;
*extension = '\0';
return filename;
return make_new_name_generic(filename, "lzma");
}
static
@ -315,11 +318,7 @@ int unlzma_main(int argc, char **argv)
static
char* make_new_name_uncompress(char *filename)
{
char *extension = strrchr(filename, '.');
if (!extension || strcmp(extension, ".Z") != 0)
return NULL;
*extension = '\0';
return filename;
return make_new_name_generic(filename, "Z");
}
static