52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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/*
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* Copyright (c) 1991-1994 by the University of Southern California
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*
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* For copying and distribution information, please see the file
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* <usc-license.h>.
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*/
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#include <usc-license.h>
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#include <pfs_threads.h>
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#ifdef PFS_THREADS
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extern p_th_mutex p_th_mutexREGEX;
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#endif
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/* This routine combines RE_COMP and RE_EXEC in an appropriate thread-safe
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interface. It currently operates by mutexing the use of the regex package.
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It will later be revised to take advantage of thread-safe library calls,
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as they become available in standard system libraries. If you need
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to do multithreaded matches right now, then you could do so by using the
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routine in misc/regex.c.
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This can also be linked with the versions of re_comp() and re_exec() that
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your system library provides; Prospero will do this by default.
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*/
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/*
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* Returns zero if successfully compiled and matched.
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* Returns 1 if not.
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* This is probably inefficient, since we always compile, even in the common
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* case where the pattern string has not changed. Need to rethink this at
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* a later date. (but not right now.)
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*/
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int
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p__re_comp_exec(char *temp, char *s)
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{
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int retval;
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p_th_mutex_lock(p_th_mutexREGEX);
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if(re_comp(temp)) {
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/* There should be a way to pass this error information up to the
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caller,but we don't have one right now. Need to look at this again
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later. */
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retval= 0;
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} else {
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/* -1 is internal error for re_exec(). 1 is match. 0 is failure to
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match. */
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retval = (re_exec(s) > 0);
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}
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p_th_mutex_unlock(p_th_mutexREGEX);
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return(retval);
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}
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