HP-UX Reference (11i v2 04/09) - 3 Library Functions N-Z (vol 7)

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regcomp(3C) regcomp(3C)

EXAMPLES

/* match string against the extended regular expression in pattern,

treating errors as no match. Return 1 for match, 0 for no match.

Print an error message if an error occurs. */

int

match(string, pattern)

char *string;

char *pattern;

{

int i;

regex_t re;

char buf[256];

i=regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB);

if (i != 0) {

(void)regerror(i,&re,buf,sizeof buf);

printf("%s\n",buf);

return(0); /* report error */

}

i = regexec(&re, string, (size_t) 0, NULL, 0);

regfree(&re);

if (i != 0) {

(void)regerror(i,&re,buf,sizeof buf);

printf("%s\n",buf);

return(0); /* report error */

}

return(1);

}

The following demonstrates how the REG_NOTBOL ﬂag could be used with regexec() to ﬁnd all sub-

strings in a line that match a pattern supplied by a user.

(void) regcomp(&re, pattern, 0);

/* look for first match at start of line */

error = regexec(&re, &buffer[0], 1, &pm, 0);

while (error == 0) { /* while matches found */

/* find next match on line */

error = regexec(&re, &buffer[pm.rm_eo], 1, &pm, REG_NOTBOL);

}

AUTHOR

regcomp(), regerror(), regexec(), and regfree() were developed by OSF and HP.