Open System Services Library Calls Reference Manual (G06.28+, H06.05+)

OSS Library Calls (n - r) regcomp(3)
regexec(&preg, start_search, 1, &pmatch,
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REG_NOTBOL);
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start_search = start_search + pmatch.rm_eo;
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count++;
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};
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count--;
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printf("There are %i matches\n", count);
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regfree(&preg);
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} |
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2. ||
The following example finds out which subexpressions in the regular expression have |
matches in the string. This example uses the same main() program as the preceding |
example. This example does not specify REG_EXTENDED in the call to regcomp() |
and, consequently, uses basic regular expressions, not extended regular expressions. |
#define MAX_MATCH 10
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int match(char *pattern, char *string)
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{
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char message[SLENGTH];
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char *start_search;
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int error, msize, count, matches_tocheck;
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regex_t preg;
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regmatch_t pmatch[MAX_MATCH];
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error = regcomp(&preg, pattern, REG_ICASE);
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if (error) {
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msize = regerror(error, &preg, message, SLENGTH);
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printf("regcomp: %s\n", message);
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if (msize > SLENGTH)
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printf("Additional text lost\n");
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return;
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}
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if (preg.re_nsub > MAX_MATCH) {
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printf("There are %i subexpressions, checking %i\n",
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preg.re_nsub, MAX_MATCH);
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matches_tocheck = MAX_MATCH;
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} else {
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printf(
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"There are %i subexpressions in re\n", preg.re_nsub);
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matches_tocheck = preg.re_nsub;
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} |
error = regexec(&preg, string, MAX_MATCH, &pmatch[0], 0);
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if (error == REG_NOMATCH) {
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printf("String did not contain match for entire re\n");
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return;
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} else if (error != 0) { |
msize = regerror(error, &preg, message, SLENGTH); |
printf("regexe: %s\n", message); |
if (msize > SLENGTH) |
printf("Additional text lost\n"); |
return; |
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