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author | Mike Frysinger <vapier@gentoo.org> | 2009-04-07 06:03:22 +0000 |
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committer | Mike Frysinger <vapier@gentoo.org> | 2009-04-07 06:03:22 +0000 |
commit | a4f331d3c3ea5b358613992a48556cc9cbfdf139 (patch) | |
tree | 316143ec21a1efd2eb7e135121134c0b8b86221e /shell/match.h | |
parent | 6c9be7f4518bf5594f5b9aaf981ed5dcc4a6939c (diff) | |
download | busybox-w32-a4f331d3c3ea5b358613992a48556cc9cbfdf139.tar.gz busybox-w32-a4f331d3c3ea5b358613992a48556cc9cbfdf139.tar.bz2 busybox-w32-a4f331d3c3ea5b358613992a48556cc9cbfdf139.zip |
implement support for parameter substitution via #/% operators
Diffstat (limited to '')
-rw-r--r-- | shell/match.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/shell/match.h b/shell/match.h new file mode 100644 index 000000000..863f52539 --- /dev/null +++ b/shell/match.h | |||
@@ -0,0 +1,22 @@ | |||
1 | /* match.h - interface to shell ##/%% matching code */ | ||
2 | |||
3 | typedef char *(*scan_t)(char *string, char *match, bool zero); | ||
4 | |||
5 | char *scanleft(char *string, char *match, bool zero); | ||
6 | char *scanright(char *string, char *match, bool zero); | ||
7 | |||
8 | static inline scan_t pick_scan(char op1, char op2, bool *zero) | ||
9 | { | ||
10 | /* # - scanleft | ||
11 | * ## - scanright | ||
12 | * % - scanright | ||
13 | * %% - scanleft | ||
14 | */ | ||
15 | if (op1 == '#') { | ||
16 | *zero = true; | ||
17 | return op1 == op2 ? scanright : scanleft; | ||
18 | } else { | ||
19 | *zero = false; | ||
20 | return op1 == op2 ? scanleft : scanright; | ||
21 | } | ||
22 | } | ||