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/*
* ##/%% variable matching code ripped out of ash shell for code sharing
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 1997-2005 Herbert Xu <herbert@gondor.apana.org.au>
* was re-ported from NetBSD and debianized.
*/
#ifdef STANDALONE
# include <stdbool.h>
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include <unistd.h>
#else
# include "libbb.h"
#endif
#include <fnmatch.h>
#include "match.h"
#define pmatch(a, b) !fnmatch((a), (b), 0)
char *scanleft(char *string, char *pattern, bool match_at_left)
{
char c;
char *loc = string;
while (1) {
int match;
c = *loc;
if (match_at_left) {
*loc = '\0';
match = pmatch(pattern, string);
*loc = c;
} else {
match = pmatch(pattern, loc);
}
if (match)
return loc;
if (!c)
return NULL;
loc++;
}
}
char *scanright(char *string, char *pattern, bool match_at_left)
{
char c;
char *loc = string + strlen(string);
while (loc >= string) {
int match;
c = *loc;
if (match_at_left) {
*loc = '\0';
match = pmatch(pattern, string);
*loc = c;
} else {
match = pmatch(pattern, loc);
}
if (match)
return loc;
loc--;
}
return NULL;
}
#ifdef STANDALONE
int main(int argc, char *argv[])
{
char *string;
char *op;
char *pattern;
bool match_at_left;
char *loc;
int i;
if (argc == 1) {
puts(
"Usage: match <test> [test...]\n\n"
"Where a <test> is the form: <string><op><match>\n"
"This is to test the shell ${var#val} expression type.\n\n"
"e.g. `match 'abc#a*'` -> bc"
);
return 1;
}
for (i = 1; i < argc; ++i) {
size_t off;
scan_t scan;
printf("'%s': ", argv[i]);
string = strdup(argv[i]);
off = strcspn(string, "#%");
if (!off) {
printf("invalid format\n");
free(string);
continue;
}
op = string + off;
scan = pick_scan(op[0], op[1], &match_at_left);
pattern = op + 1;
if (op[0] == op[1])
op[1] = '\0', ++pattern;
op[0] = '\0';
loc = scan(string, pattern, match_at_left);
if (match_at_left) {
printf("'%s'\n", loc);
} else {
*loc = '\0';
printf("'%s'\n", string);
}
free(string);
}
return 0;
}
#endif
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