Fri, 25 May 2012 17:39:27 +0200
added map iterator
1 /*
2 * File: sstring.c
3 * Author: olaf
4 *
5 * Created on 17. Juni 2010, 13:27
6 */
8 #include <stdlib.h>
9 #include <strings.h>
10 #include <stdarg.h>
12 #include "string.h"
14 sstr_t sstr (char *s) {
15 sstr_t string;
16 string.ptr = s;
17 string.length = strlen(s);
18 return string;
19 }
21 sstr_t sstrn (char *s, size_t n) {
22 sstr_t string;
23 string.ptr = s;
24 string.length = n;
25 return string;
26 }
28 size_t sstrnlen (size_t n, sstr_t s, ...) {
29 va_list ap;
30 size_t size = s.length;
31 va_start(ap, s);
33 for (int i=0;i<n-1;i++) {
34 sstr_t str = va_arg(ap, sstr_t);
35 size += str.length;
36 }
37 va_end(ap);
39 return size;
40 }
42 sstr_t sstrcat (sstr_t s, ...) {
43 va_list ap;
44 va_start(ap, s);
45 s.ptr[0] = 0;
47 sstr_t str = va_arg (ap, sstr_t);
48 while (str.ptr != NULL) {
49 s.ptr = strncat (s.ptr, str.ptr, s.length);
50 str = va_arg (ap, sstr_t);
51 }
52 va_end(ap);
54 return s;
55 }
57 sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
58 va_list ap;
59 va_start(ap, c1);
60 s.ptr[0] = 0;
62 s.ptr = strncat (s.ptr, c1.ptr, s.length);
63 for (int i=0;i<n-1;i++) {
64 sstr_t str = va_arg (ap, sstr_t);
65 s.ptr = strncat (s.ptr, str.ptr, s.length);
66 }
67 va_end(ap);
69 return s;
70 }
72 sstr_t sstrsubs (sstr_t s, size_t start) {
73 return sstrsubsl (s, start, s.length-start);
74 }
76 sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) {
77 sstr_t new_sstr;
78 if (start < 0 || start >= s.length || length < 0) {
79 return s;
80 }
81 if (length > s.length-start) {
82 length = s.length-start;
83 }
84 new_sstr.ptr = &s.ptr[start];
85 new_sstr.length = length;
86 return new_sstr;
87 }
89 int sstrcmp(sstr_t s1, sstr_t s2) {
90 return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
91 }
93 sstr_t sstrdup(sstr_t s) {
94 sstr_t newstring;
95 newstring.ptr = (char*) malloc(s.length + 1);
96 if (newstring.ptr != NULL) {
97 newstring.length = s.length;
98 newstring.ptr[newstring.length] = 0;
100 memcpy(newstring.ptr, s.ptr, s.length);
101 }
103 return newstring;
104 }