1 #include <string.h> 2 #include <stdlib.h> 3 #include <limits.h> 4 5 #include "strntol.h" 6 7 long strntol(const char *str, size_t sz, char **end, int base) 8 { 9 /* Expect that digit representation of LONG_MAX/MIN 10 * not greater than this buffer */ 11 char buf[24]; 12 long ret; 13 const char *beg = str; 14 15 /* Catch up leading spaces */ 16 for (; beg && sz && *beg == ' '; beg++, sz--) 17 ; 18 19 if (!sz || sz >= sizeof(buf)) { 20 if (end) 21 *end = (char *)str; 22 return 0; 23 } 24 25 memcpy(buf, beg, sz); 26 buf[sz] = '\0'; 27 ret = strtol(buf, end, base); 28 if (ret == LONG_MIN || ret == LONG_MAX) 29 return ret; 30 if (end) 31 *end = (char *)str + (*end - buf); 32 return ret; 33 } 34
