wmii

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localelen.c (581B)

      1 /* Copyright ©2010 Kris Maglione <maglione.k at Gmail>
      2  * Copyright ©2002 by Lucent Technologies.
      3  * See LICENSE file for license details.
      4  */
      5 #include "fmtdef.h"
      6 
      7 int
      8 localelen(char *str, char *end) {
      9 	mbstate_t state;
     10 	size_t n, res;
     11 
     12 	if(utf8locale()) {
     13 		if(end)
     14 			return utfnlen(str, end - str);
     15 		return utflen(str);
     16 	}
     17 
     18 	state = (mbstate_t){0};
     19 	n = 0;
     20 	for(n=0;;)
     21 		switch((res = mbrtowc(nil, str, end ? end - str : MB_LEN_MAX, &state))) {
     22 		case -1:
     23 			return -1;
     24 		case 0:
     25 		case -2:
     26 			return n;
     27 		default:
     28 			n++;
     29 			str += res;
     30 		}
     31 	return n; /* Not reached. */
     32 }
     33