src/server/ucx/sstring.c

Sat, 14 Jan 2012 13:53:44 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 14 Jan 2012 13:53:44 +0100
changeset 14
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src/server/sstring.c@3c066d52342d
permissions
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New source folder layout

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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 if(s == NULL) {
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38 string.length = 0;
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39 string.ptr = NULL;
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40 } else {
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41 string.ptr = s;
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42 string.length = strlen(s);
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43 }
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44 return string;
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45 }
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46
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47 sstr_t sstrn (char *s, size_t n) {
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48 sstr_t string;
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49 string.ptr = s;
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50 string.length = n;
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51 return string;
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52 }
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53
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54 size_t sstrnlen (size_t n, sstr_t s, ...) {
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55 va_list ap;
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56 size_t size = s.length;
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57 va_start(ap, s);
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58
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59 for (int i=0;i<n-1;i++) {
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60 sstr_t str = va_arg(ap, sstr_t);
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61 size += str.length;
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62 }
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63
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64 return size;
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65 }
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66
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67 sstr_t sstrcat (sstr_t s, ...) {
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68 va_list ap;
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69 va_start(ap, s);
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70 s.ptr[0] = 0;
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71
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72 sstr_t str = va_arg (ap, sstr_t);
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73 while (str.ptr != NULL) {
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74 s.ptr = strncat (s.ptr, str.ptr, s.length);
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75 str = va_arg (ap, sstr_t);
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76 }
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77
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78 return s;
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79 }
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80
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81 sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
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82 va_list ap;
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83 va_start(ap, c1);
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84 s.ptr[0] = 0;
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85
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86 s.ptr = strncat (s.ptr, c1.ptr, s.length);
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87 for (int i=0;i<n-1;i++) {
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88 sstr_t str = va_arg (ap, sstr_t);
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89 s.ptr = strncat (s.ptr, str.ptr, s.length);
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90 }
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91
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92 return s;
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93 }
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94
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95 sstr_t sstrsubs (sstr_t s, size_t start) {
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96 return sstrsubsl (s, start, s.length-start);
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97 }
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98
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99 sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) {
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100 sstr_t new_sstr;
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101 if (start < 0 || start >= s.length || length < 0) {
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102 return s;
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103 }
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104 if (length > s.length-start) {
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105 length = s.length-start;
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106 }
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107 new_sstr.ptr = &s.ptr[start];
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108 new_sstr.length = length;
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109 return new_sstr;
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110 }
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111
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112 int sstrcmp(sstr_t s1, sstr_t s2) {
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113 return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
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114 }
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115
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116 sstr_t sstrdub(sstr_t s) {
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117 sstr_t newstring;
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118 newstring.ptr = malloc(s.length + 1);
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119 newstring.length = s.length;
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120 newstring.ptr[newstring.length] = 0;
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121
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122 memcpy(newstring.ptr, s.ptr, s.length);
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123
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124 return newstring;
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125 }

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