From a4f331d3c3ea5b358613992a48556cc9cbfdf139 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 7 Apr 2009 06:03:22 +0000 Subject: implement support for parameter substitution via #/% operators --- shell/match.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 shell/match.h (limited to 'shell/match.h') 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 @@ +/* match.h - interface to shell ##/%% matching code */ + +typedef char *(*scan_t)(char *string, char *match, bool zero); + +char *scanleft(char *string, char *match, bool zero); +char *scanright(char *string, char *match, bool zero); + +static inline scan_t pick_scan(char op1, char op2, bool *zero) +{ + /* # - scanleft + * ## - scanright + * % - scanright + * %% - scanleft + */ + if (op1 == '#') { + *zero = true; + return op1 == op2 ? scanright : scanleft; + } else { + *zero = false; + return op1 == op2 ? scanleft : scanright; + } +} -- cgit v1.2.3