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libbb: code shrink bb_parse_mode 

function                                             old     new   delta
bb_parse_mode                                        393     398      +5
static.who_mask                                       16       8      -8
static.perm_mask                                      24      12     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 5/-20)             Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-09-17 00:47:23 +02:00
parent 2df4e0a370
commit 4958c18134
2 changed files with 4 additions and 3 deletions
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2
include/libbb.h
View File

@ -1607,7 +1607,7 @@ char *bb_ask_noecho_stdin(const char *prompt) FAST_FUNC;
int bb_ask_y_confirmation_FILE(FILE *fp) FAST_FUNC;
int bb_ask_y_confirmation(void) FAST_FUNC;
/* Returns -1 if input is invalid. current_mode is a base for e.g. "u+rw" */
/* Returns -1 if input is invalid. cur_mode is a base for e.g. "u+rw" */
int bb_parse_mode(const char* s, unsigned cur_mode) FAST_FUNC;
/*

5
libbb/parse_mode.c
View File

@ -16,13 +16,14 @@
int FAST_FUNC bb_parse_mode(const char *s, unsigned current_mode)
{
static const mode_t who_mask[] = {
/* should be mode_t really, but in all Unixes these constants fit into uint16 */
static const uint16_t who_mask[] ALIGN2 = {
S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO, /* a */
S_ISUID | S_IRWXU, /* u */
S_ISGID | S_IRWXG, /* g */
S_IRWXO /* o */
};
static const mode_t perm_mask[] = {
static const uint16_t perm_mask[] ALIGN2 = {
S_IRUSR | S_IRGRP | S_IROTH, /* r */
S_IWUSR | S_IWGRP | S_IWOTH, /* w */
S_IXUSR | S_IXGRP | S_IXOTH, /* x */