Regular Expresions in C

[Juan Alvarez]

What i need to do to use Regex in C?

Any help?

[RADAR]

#include // sys/types.h
 
#include // regex.h
 
 
 
 
int match(const char *string, char *pattern) {
 
  int status;
 
  regex_t re;
 
 
 
  if(regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB) != 0) {
 
    return 0; }
 
  status = regexec(&re, string, (size_t)0, NULL, 0);
 
  regfree(&re);
 
  if(status != 0) {
 
    return 0; }
 
  return 1; } 
 

Also there is a shortcut without the header file
int error;

  regex_t pdata;
  regmatch_t pmatch[3];
 
  if (error = regcomp(&pdata, "a\([bc]*\)a\([bc]*\)a", 0) {
    /* handle error */
  } else if (error = regexec(&pdata, "xxxabcbabbcaxxx", 3, pmatch, 0) {
    /* handle error */
  } else {
    printf("The regex matches from %d to %d.\n",
            pmatch[0].rm_so, pmatch[0].rm_eo);
    regfree(&pdata);
  }

respects,

[Banfa]

I think you will find that these functions are not standard C (or C++) however if your system supports them then use them but remember using them will reduce the portability of your code.

[Juan Alvarez]

Thanks for replying =)