Annotation of embedaddon/hping2/hstring.c, revision 1.1.1.1
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: }
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