Annotation of embedaddon/hping2/hstring.c, revision 1.1
1.1 ! misho 1: /* hstring.c - Random string-related functions for hping.
! 2: * Copyright(C) 2003 Salvatore Sanfilippo
! 3: * All rights reserved */
! 4:
! 5: #include <sys/types.h>
! 6: #include <string.h>
! 7: #include <ctype.h>
! 8:
! 9: /* return 1 if the string looks like an integer number
! 10: * otherwise 0 is returned.
! 11: *
! 12: * this function is equivalent to this regexp:
! 13: * [:space:]*-{0,1}[0-9]+[:space:]*
! 14: * in english:
! 15: * (0-inf spaces)(zero or one -)(1-inf digits)(0-inf spaces)
! 16: */
! 17: int strisnum(char *s)
! 18: {
! 19: int digits = 0; /* used to return false if there aren't digits */
! 20:
! 21: while(isspace(*s))
! 22: s++; /* skip initial spaces */
! 23: if (*s == '-') /* negative number? */
! 24: s++;
! 25: while(*s) {
! 26: if (isspace(*s)) { /* skip spaces in the tail */
! 27: while(isspace(*s))
! 28: s++;
! 29: if (*s) return 0; /* but don't allow other tail chars */
! 30: return digits ? 1 : 0;
! 31: }
! 32: if (!isdigit(*s))
! 33: return 0;
! 34: s++;
! 35: digits++;
! 36: }
! 37: return digits ? 1 : 0;
! 38: }
! 39:
! 40: /* function similar to strtok() more convenient when we know the
! 41: * max number of tokens, to tokenize with a single call.
! 42: * Unlike strtok(), strftok() is thread safe.
! 43: *
! 44: * ARGS:
! 45: * 'sep' is a string that contains all the delimiter characters
! 46: * 'str' is the string to tokenize, that will be modified
! 47: * 'tptrs' is an array of char* poiters that will contain the token pointers
! 48: * 'nptrs' is the length of the 'tptrs' array.
! 49: *
! 50: * RETURN VALUE:
! 51: * The number of extracted tokens is returned.
! 52: */
! 53: size_t strftok(char *sep, char *str, char **tptrs, size_t nptrs)
! 54: {
! 55: size_t seplen = strlen(sep);
! 56: size_t i, j = 0;
! 57: int inside = 0;
! 58:
! 59: while(*str) {
! 60: for(i = 0; i < seplen; i++) {
! 61: if (sep[i] == *str)
! 62: break;
! 63: }
! 64: if (i == seplen) { /* no match */
! 65: if (!inside) {
! 66: tptrs[j++] = str;
! 67: inside = 1;
! 68: }
! 69: } else { /* match */
! 70: if (inside) {
! 71: *str = '\0';
! 72: if (j == nptrs)
! 73: return j;
! 74: inside = 0;
! 75: }
! 76: }
! 77: str++;
! 78: }
! 79: return j;
! 80: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>