src/server/sstring.c

Fri, 30 Dec 2011 14:06:56 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 30 Dec 2011 14:06:56 +0100
changeset 10
e3ae779232a9
parent 1
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permissions
-rw-r--r--

Added some safs

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2011 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdlib.h>
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30 #include <string.h>
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31 #include <stdarg.h>
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32
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33 #include "sstring.h"
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34
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35 sstr_t sstr (char *s) {
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36 sstr_t string;
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37 string.ptr = s;
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38 string.length = strlen(s);
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39 return string;
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40 }
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41
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42 sstr_t sstrn (char *s, size_t n) {
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43 sstr_t string;
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44 string.ptr = s;
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45 string.length = n;
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46 return string;
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47 }
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48
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49 size_t sstrnlen (size_t n, sstr_t s, ...) {
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50 va_list ap;
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51 size_t size = s.length;
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52 va_start(ap, s);
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53
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54 for (int i=0;i<n-1;i++) {
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55 sstr_t str = va_arg(ap, sstr_t);
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56 size += str.length;
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57 }
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58
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59 return size;
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60 }
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61
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62 sstr_t sstrcat (sstr_t s, ...) {
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63 va_list ap;
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64 va_start(ap, s);
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65 s.ptr[0] = 0;
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66
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67 sstr_t str = va_arg (ap, sstr_t);
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68 while (str.ptr != NULL) {
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69 s.ptr = strncat (s.ptr, str.ptr, s.length);
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70 str = va_arg (ap, sstr_t);
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71 }
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72
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73 return s;
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74 }
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75
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76 sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
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77 va_list ap;
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78 va_start(ap, c1);
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79 s.ptr[0] = 0;
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80
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81 s.ptr = strncat (s.ptr, c1.ptr, s.length);
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82 for (int i=0;i<n-1;i++) {
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83 sstr_t str = va_arg (ap, sstr_t);
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84 s.ptr = strncat (s.ptr, str.ptr, s.length);
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85 }
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86
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87 return s;
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88 }
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89
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90 sstr_t sstrsubs (sstr_t s, size_t start) {
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91 return sstrsubsl (s, start, s.length-start);
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92 }
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93
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94 sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) {
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95 sstr_t new_sstr;
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96 if (start < 0 || start >= s.length || length < 0) {
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97 return s;
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98 }
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99 if (length > s.length-start) {
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100 length = s.length-start;
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101 }
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102 new_sstr.ptr = &s.ptr[start];
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103 new_sstr.length = length;
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104 return new_sstr;
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105 }
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106
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107 int sstrcmp(sstr_t s1, sstr_t s2) {
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108 return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
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109 }
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110
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111 sstr_t sstrdub(sstr_t s) {
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112 sstr_t newstring;
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113 newstring.ptr = malloc(s.length + 1);
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114 newstring.length = s.length;
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115 newstring.ptr[newstring.length] = 0;
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116
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117 memcpy(newstring.ptr, s.ptr, s.length);
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118
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119 return newstring;
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120 }

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