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

regcomp(3) OSS Library Calls Reference Manual
char patt[SLENGTH], strng[SLENGTH];
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char *eol;
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(void)setlocale(LC_ALL, "");
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printf("Enter a regular expression:");
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fgets(patt, SLENGTH, stdin);
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if ((eol = strchr(patt, ’\n’)) != NULL)
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*eol = ’\0’; /* Replace newline with null */
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else
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return; /* Line entered too long */
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printf("Enter string to compare\nString: ");
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fgets(strng, SLENGTH, stdin);
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if ((eol = strchr(strng, ’\n’)) != NULL)
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*eol = ’\0’; /* Replace newline with null */
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else
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return; /* Line entered too long */
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match(patt, strng);
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}
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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;
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regex_t preg;
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regmatch_t pmatch;
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error = regcomp(&preg, pattern,
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REG_ICASE | REG_EXTENDED);
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if (error) {
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msize = regerror(error, &preg, message, SLENGTH);
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printf("%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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} |
error = regexec(&preg, string, 1, &pmatch, 0);
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if (error == REG_NOMATCH) {
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printf("No matches in string\n");
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return;
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} else if (error != 0) {
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msize = regerror(error, &preg, message, SLENGTH);
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printf("%s\n", message);
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if (msize > SLENGTH)
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printf("Additional text lost\n");
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return; |
}; |
count = 1; |
start_search = string + pmatch.rm_eo; |
while (error == 0) { |
error = |
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