wmii

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getbase.c (762B)

      1 /* Copyright ©2008-2010 Kris Maglione <maglione.k at Gmail>
      2  * See LICENSE file for license details.
      3  */
      4 #include <ctype.h>
      5 #include <string.h>
      6 #include <stuff/util.h>
      7 
      8 #define strbcmp(str, const) (strncmp((str), (const), sizeof(const)-1))
      9 int
     10 getbase(const char **s, long *sign) {
     11 	const char *p;
     12 	int ret;
     13 
     14 	ret = 10;
     15 	*sign = 1;
     16 	if(**s == '-') {
     17 		*sign = -1;
     18 		*s += 1;
     19 	}else if(**s == '+')
     20 		*s += 1;
     21 
     22 	p = *s;
     23 	if(!strbcmp(p, "0x")) {
     24 		*s += 2;
     25 		ret = 16;
     26 	}
     27 	else if(isdigit(p[0])) {
     28 		if(p[1] == 'r') {
     29 			*s += 2;
     30 			ret = p[0] - '0';
     31 		}
     32 		else if(isdigit(p[1]) && p[2] == 'r') {
     33 			*s += 3;
     34 			ret = 10*(p[0]-'0') + (p[1]-'0');
     35 		}
     36 	}
     37 	else if(p[0] == '0') {
     38 		ret = 8;
     39 	}
     40 	if(ret != 10 && (**s == '-' || **s == '+'))
     41 		*sign = 0;
     42 	return ret;
     43 }