src/server/ucx/string.c

Sat, 12 Jan 2013 14:00:47 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sat, 12 Jan 2013 14:00:47 +0100
changeset 46
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parent 36
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child 51
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permissions
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cleaning up resources after requests

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1 /*
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2 * File: sstring.c
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3 * Author: olaf
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4 *
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5 * Created on 17. Juni 2010, 13:27
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6 */
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7
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8 #include <stdlib.h>
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9 #include <strings.h>
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10 #include <stdarg.h>
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11
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12 #include "string.h"
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13
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14 sstr_t sstr (char *s) {
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15 sstr_t string;
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16 string.ptr = s;
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17 string.length = strlen(s);
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18 return string;
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19 }
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20
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21 sstr_t sstrn (char *s, size_t n) {
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22 sstr_t string;
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23 string.ptr = s;
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24 string.length = n;
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25 return string;
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26 }
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27
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28 size_t sstrnlen (size_t n, sstr_t s, ...) {
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29 va_list ap;
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30 size_t size = s.length;
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31 va_start(ap, s);
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32
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33 for (int i=0;i<n-1;i++) {
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34 sstr_t str = va_arg(ap, sstr_t);
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35 size += str.length;
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36 }
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37 va_end(ap);
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39 return size;
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40 }
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41
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42 sstr_t sstrcat (sstr_t s, ...) {
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43 va_list ap;
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44 va_start(ap, s);
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45 s.ptr[0] = 0;
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46
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47 sstr_t str = va_arg (ap, sstr_t);
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48 while (str.ptr != NULL) {
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49 s.ptr = strncat (s.ptr, str.ptr, s.length);
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50 str = va_arg (ap, sstr_t);
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51 }
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52 va_end(ap);
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53
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54 return s;
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55 }
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56
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57 sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) {
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58 va_list ap;
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59 va_start(ap, c1);
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60 s.ptr[0] = 0;
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61
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62 size_t len = s.length;
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63 size_t cplen = c1.length > len ? len : c1.length;
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64 char *ptr = s.ptr;
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65
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66 memcpy(ptr, c1.ptr, cplen);
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67 len -= cplen;
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68 ptr += cplen;
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69 for (int i=0;i<n-1;i++) {
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70 sstr_t str = va_arg (ap, sstr_t);
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71 cplen = str.length > len ? len : str.length;
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72 if(cplen <= 0) {
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73 va_end(ap);
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74 return s;
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75 }
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76 memcpy(ptr, str.ptr, cplen);
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77 len -= cplen;
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78 ptr += cplen;
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79 }
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80 va_end(ap);
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81
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82 return s;
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83 }
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84
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85 sstr_t sstrsubs (sstr_t s, size_t start) {
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86 return sstrsubsl (s, start, s.length-start);
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87 }
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88
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89 sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) {
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90 sstr_t new_sstr;
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91 if (start < 0 || start >= s.length || length < 0) {
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92 return s;
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93 }
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94 if (length > s.length-start) {
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95 length = s.length-start;
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96 }
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97 new_sstr.ptr = &s.ptr[start];
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98 new_sstr.length = length;
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99 return new_sstr;
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100 }
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101
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102 sstr_t* sstrsplit(sstr_t s, sstr_t d, size_t *n) {
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103 if (d.length == 0) {
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104 return NULL;
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105 }
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106
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107 sstr_t* result;
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108 size_t nmax = *n;
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109 *n = 1;
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110
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111 /* special case: exact match - no processing needed */
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112 if (s.length == d.length && strncmp(s.ptr, d.ptr, s.length) == 0) {
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113 result = malloc(sizeof(sstr_t));
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114 result[0] = sstrn("", 0);
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115 return result;
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116 }
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117 sstr_t sv = sstrdup(s);
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118
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119 for (int i = 0 ; i < s.length ; i++) {
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120 if (sv.ptr[i] == d.ptr[0]) {
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121 _Bool match = 1;
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122 for (int j = 1 ; j < d.length ; j++) {
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123 if (j+i < s.length) {
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124 match &= (sv.ptr[i+j] == d.ptr[j]);
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125 } else {
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126 match = 0;
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127 break;
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128 }
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129 }
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130 if (match) {
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131 (*n)++;
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132 for (int j = 0 ; j < d.length ; j++) {
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133 sv.ptr[i+j] = 0;
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134 }
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135 i += d.length;
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136 }
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137 }
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138 if ((*n) == nmax) break;
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139 }
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140 result = malloc(sizeof(sstr_t) * (*n));
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141
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142 char *pptr = sv.ptr;
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143 for (int i = 0 ; i < *n ; i++) {
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144 size_t l = strlen(pptr);
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145 char* ptr = malloc(l + 1);
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146 memcpy(ptr, pptr, l);
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147 ptr[l] = 0;
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148
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149 result[i] = sstrn(ptr, l);
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150 pptr += l + d.length;
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151 }
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152
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153 free(sv.ptr);
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154
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155 return result;
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156 }
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157
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158 int sstrcmp(sstr_t s1, sstr_t s2) {
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159 return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length);
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160 }
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161
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162 sstr_t sstrdup(sstr_t s) {
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163 sstr_t newstring;
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164 newstring.ptr = (char*) malloc(s.length + 1);
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165 if (newstring.ptr != NULL) {
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166 newstring.length = s.length;
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167 newstring.ptr[newstring.length] = 0;
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168
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169 memcpy(newstring.ptr, s.ptr, s.length);
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170 }
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171
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172 return newstring;
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173 }
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174
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175 // webserver extension
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176 sstr_t sstrtrim(sstr_t string) {
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177 sstr_t newstr = string;
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178 int nsoff = 0;
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179 int l = 1;
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180 for(int i=0;i<string.length;i++) {
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181 char c = string.ptr[i];
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182 if(l) {
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183 /* leading whitespace */
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184 if(c > 32) {
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185 l = 0;
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186 nsoff = i;
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187 newstr.ptr = &string.ptr[i];
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188 newstr.length = string.length - nsoff;
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189 }
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190 } else {
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191 /* trailing whitespace */
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192 if(c > 32) {
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193 newstr.length = (i - nsoff) + 1;
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194 }
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195 }
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196 }
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197 return newstr;
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198 }
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199
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200 sstr_t sstrdup_mp(UcxMempool *pool, sstr_t s) {
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201 sstr_t newstring;
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202 newstring.ptr = (char*)ucx_mempool_malloc(pool, s.length + 1);
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203 if (newstring.ptr != NULL) {
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204 newstring.length = s.length;
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205 newstring.ptr[newstring.length] = 0;
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206
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207 memcpy(newstring.ptr, s.ptr, s.length);
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208 }
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209
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210 return newstring;
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211 }
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212
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213 sstr_t sstrdup_pool(pool_handle_t *pool, sstr_t s) {
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214 sstr_t newstring;
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215 newstring.ptr = (char*)pool_malloc(pool, s.length + 1);
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216 if (newstring.ptr != NULL) {
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217 newstring.length = s.length;
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218 newstring.ptr[newstring.length] = 0;
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219
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220 memcpy(newstring.ptr, s.ptr, s.length);
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221 }
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222
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223 return newstring;
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224 }

mercurial