busybox/shell/match.h
Denis Vlasenko 5b7589eb27 hush: fix SEGV in % expansion
function                                             old     new   delta
expand_variables                                    2203    2217     +14
2009-04-26 11:25:19 +00:00

27 lines
658 B
C

/* match.h - interface to shell ##/%% matching code */
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
typedef char *(*scan_t)(char *string, char *match, bool match_at_left);
char *scanleft(char *string, char *match, bool match_at_left);
char *scanright(char *string, char *match, bool match_at_left);
static inline scan_t pick_scan(char op1, char op2, bool *match_at_left)
{
/* # - scanleft
* ## - scanright
* % - scanright
* %% - scanleft
*/
if (op1 == '#') {
*match_at_left = true;
return op1 == op2 ? scanright : scanleft;
} else {
*match_at_left = false;
return op1 == op2 ? scanleft : scanright;
}
}
POP_SAVED_FUNCTION_VISIBILITY