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author | Igor Pashev <pashev.igor@gmail.com> | 2012-06-24 22:28:35 +0000 |
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committer | Igor Pashev <pashev.igor@gmail.com> | 2012-06-24 22:28:35 +0000 |
commit | 3950ffe2a485479f6561c27364d3d7df5a21d124 (patch) | |
tree | 468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/comp/re_comp.c | |
download | ksh-upstream.tar.gz |
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/comp/re_comp.c')
-rw-r--r-- | src/lib/libast/comp/re_comp.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/lib/libast/comp/re_comp.c b/src/lib/libast/comp/re_comp.c new file mode 100644 index 0000000..ad31f24 --- /dev/null +++ b/src/lib/libast/comp/re_comp.c @@ -0,0 +1,81 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2011 AT&T Intellectual Property * +* and is licensed under the * +* Eclipse Public License, Version 1.0 * +* by AT&T Intellectual Property * +* * +* A copy of the License is available at * +* http://www.eclipse.org/org/documents/epl-v10.html * +* (with md5 checksum b35adb5213ca9657e911e9befb180842) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#pragma prototyped +/* + * re_comp implementation + */ + +#include <ast.h> +#include <re_comp.h> +#include <regex.h> + +#undef error +#undef valid + +static struct +{ + char error[64]; + regex_t re; + int valid; +} state; + +char* +re_comp(const char* pattern) +{ + register int r; + + if (!pattern || !*pattern) + { + if (state.valid) + return 0; + r = REG_BADPAT; + } + else + { + if (state.valid) + { + state.valid = 0; + regfree(&state.re); + } + if (!(r = regcomp(&state.re, pattern, REG_LENIENT|REG_NOSUB|REG_NULL))) + { + state.valid = 1; + return 0; + } + } + regerror(r, &state.re, state.error, sizeof(state.error)); + return state.error; +} + +int +re_exec(const char* subject) +{ + if (state.valid && subject) + switch (regexec(&state.re, subject, 0, NiL, 0)) + { + case 0: + return 1; + case REG_NOMATCH: + return 0; + } + return -1; +} |