Mercurial > hg > th-libs
annotate th_string.c @ 7:41885619fc79
Updates.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 26 Nov 2008 22:17:02 +0200 |
parents | bd61a80a6c54 |
children | acc2a8035dd5 |
rev | line source |
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0
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1 /* |
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2 * Miscellaneous string-handling related utility-functions |
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3 * Programmed and designed by Matti 'ccr' Hamalainen |
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4 * (C) Copyright 2002-2008 Tecnic Software productions (TNSP) |
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5 * |
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6 * Please read file 'COPYING' for information on license and distribution. |
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7 */ |
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8 #ifdef HAVE_CONFIG_H |
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9 #include "config.h" |
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10 #endif |
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11 #include "th_string.h" |
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12 |
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13 #define LPREV (pNode->pPrev) |
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14 #define LNEXT (pNode->pNext) |
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15 |
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16 /* Allocate memory for a string with given length |
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17 */ |
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18 char *th_stralloc(const size_t l) |
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19 { |
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20 assert(l > 0); |
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21 return th_malloc(sizeof(char) * l); |
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22 } |
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23 |
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24 |
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25 char *th_strrealloc(char * s, const size_t l) |
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26 { |
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27 assert(l > 0); |
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28 return th_realloc(s, sizeof(char) * l); |
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29 } |
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30 |
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31 |
7 | 32 char *th_strncpy(char * dst, const char * src, size_t n) |
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33 { |
7 | 34 const char *s = src; |
35 char *d = dst; | |
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36 size_t i; |
7 | 37 assert(src != NULL); |
38 assert(dst != NULL); | |
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39 |
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40 /* Copy to the destination */ |
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41 i = n; |
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42 while (*s && (i > 0)) { |
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43 *(d++) = *(s++); |
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44 i--; |
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45 } |
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46 |
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47 /* Fill rest of space with zeros */ |
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48 while (i > 0) { |
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49 *(d++) = 0; |
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50 i--; |
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51 } |
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52 |
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53 /* Ensure that last is always zero */ |
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54 dst[n - 1] = 0; |
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55 |
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56 return dst; |
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57 } |
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58 |
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59 |
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60 int th_strncmp(char * str1, char * str2, size_t n) |
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61 { |
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62 char *s1, *s2; |
7 | 63 assert(str1 != NULL); |
64 assert(str2 != NULL); | |
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65 |
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66 /* Check the string pointers */ |
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67 if (str1 == str2) |
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68 return 0; |
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69 |
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70 /* Go through the string */ |
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71 s1 = str1; |
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72 s2 = str2; |
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73 while ((n > 0) && *s1 && *s2 && (*s1 == *s2)) { |
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74 s1++; |
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75 s2++; |
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76 n--; |
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77 } |
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78 |
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79 if (n > 0) |
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80 return ((*s1) - (*s2)); |
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81 else |
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82 return 0; |
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83 } |
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84 |
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85 |
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86 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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87 */ |
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88 int th_strcasecmp(char * str1, char * str2) |
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89 { |
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90 char *s1 = str1, *s2 = str2; |
7 | 91 assert(str1 != NULL); |
92 assert(str2 != NULL); | |
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93 |
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94 /* Check the string pointers */ |
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95 if (str1 == str2) |
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96 return 0; |
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97 |
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98 /* Go through the string */ |
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99 while (*s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { |
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100 s1++; |
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101 s2++; |
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102 } |
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103 |
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104 return (th_tolower(*s1) - th_tolower(*s2)); |
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105 } |
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106 |
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107 |
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108 int th_strncasecmp(char * str1, char * str2, size_t n) |
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109 { |
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110 char *s1 = str1, *s2 = str2; |
7 | 111 assert(str1 != NULL); |
112 assert(str2 != NULL); | |
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113 |
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114 /* Check the string pointers */ |
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115 if (str1 == str2) |
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116 return 0; |
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117 |
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118 /* Go through the string */ |
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119 while ((n > 0) && *s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { |
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120 s1++; |
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121 s2++; |
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122 n--; |
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123 } |
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124 |
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125 if (n > 0) |
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126 return (th_tolower(*s1) - th_tolower(*s2)); |
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127 else |
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128 return 0; |
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129 } |
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130 |
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131 |
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132 /* Remove all occurences of control characters, in-place. |
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133 * Resulting string is always shorter or same length than original. |
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134 */ |
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135 void th_strip_ctrlchars(char * str) |
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136 { |
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137 char *i, *j; |
7 | 138 assert(str != NULL); |
0
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139 |
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140 i = str; |
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141 j = str; |
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142 while (*i) { |
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143 if (!th_iscntrl(*i)) |
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144 *(j++) = *i; |
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145 i++; |
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146 } |
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147 |
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148 *j = 0; |
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149 } |
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150 |
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151 |
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152 /* Copy a given string over in *result. |
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153 */ |
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154 int th_pstrcpy(char ** result, char * str) |
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155 { |
7 | 156 assert(result != NULL); |
0
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157 |
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158 /* Check the string pointers */ |
7 | 159 if (str == NULL) |
0
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160 return -1; |
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161 |
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162 /* Allocate memory for destination */ |
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163 th_free(*result); |
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164 *result = th_stralloc(strlen(str) + 1); |
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165 if (!*result) |
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166 return -2; |
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167 |
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168 /* Copy to the destination */ |
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169 strcpy(*result, str); |
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170 |
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171 return 0; |
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172 } |
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173 |
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174 |
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175 /* Concatenates a given string into string pointed by *result. |
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176 */ |
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177 int th_pstrcat(char ** result, char * str) |
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178 { |
7 | 179 assert(result != NULL); |
0
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180 |
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181 /* Check the string pointers */ |
7 | 182 if (str == NULL) |
0
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183 return -1; |
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184 |
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185 if (*result != NULL) { |
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186 *result = th_strrealloc(*result, strlen(*result) + strlen(str) + 1); |
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187 if (*result == NULL) |
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188 return -1; |
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189 |
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190 strcat(*result, str); |
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191 } else { |
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192 *result = th_stralloc(strlen(str) + 1); |
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193 if (*result == NULL) |
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194 return -1; |
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195 |
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196 strcpy(*result, str); |
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197 } |
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198 |
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199 return 0; |
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200 } |
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201 |
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202 |
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203 /* Find next non-whitespace character in string. |
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204 * Updates iPos into the position of such character and |
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205 * returns pointer to the string. |
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206 */ |
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207 char *th_findnext(char * str, size_t * iPos) |
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208 { |
7 | 209 assert(str != NULL); |
0
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210 |
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211 /* Terminating NULL-character is not whitespace! */ |
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212 while (th_isspace(str[*iPos])) |
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213 (*iPos)++; |
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214 return &str[*iPos]; |
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215 } |
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216 |
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217 |
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218 /* Find next chSep-character from string |
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219 */ |
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220 char *th_findsep(char * str, size_t * iPos, char chSep) |
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221 { |
7 | 222 assert(str != NULL); |
0
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223 |
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224 /* Terminating NULL-character is not digit! */ |
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225 while (str[*iPos] && (str[*iPos] != chSep)) |
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226 (*iPos)++; |
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227 return &str[*iPos]; |
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228 } |
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229 |
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230 |
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231 /* Find next chSep- or whitespace from string |
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232 */ |
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233 char *th_findseporspace(char * str, size_t * iPos, char chSep) |
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234 { |
7 | 235 assert(str != NULL); |
0
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236 |
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237 /* Terminating NULL-character is not digit! */ |
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238 while (!th_isspace(str[*iPos]) && (str[*iPos] != chSep)) |
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239 (*iPos)++; |
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240 return &str[*iPos]; |
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241 } |
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242 |
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243 |
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244 /* Compare a string to a pattern. Case-SENSITIVE version. |
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245 * The matching pattern can consist of any normal characters plus |
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246 * wildcards ? and *. "?" matches any character and "*" matches |
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247 * any number of characters. |
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248 */ |
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249 BOOL th_strmatch(char * str, char * pattern) |
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250 { |
7 | 251 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
252 char *tmpPattern = NULL; | |
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253 |
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254 /* Check given pattern and string */ |
7 | 255 if (str == NULL || pattern == NULL) |
0
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256 return FALSE; |
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257 |
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258 /* Start comparision */ |
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259 do { |
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260 didMatch = FALSE; |
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261 switch (*pattern) { |
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262 case '?': |
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263 /* Any single character matches */ |
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264 if (*str) { |
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265 didMatch = TRUE; |
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266 pattern++; |
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267 str++; |
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268 } |
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269 break; |
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270 |
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271 case '*': |
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272 didMatch = TRUE; |
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273 pattern++; |
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274 if (!*pattern) |
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275 isEnd = TRUE; |
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276 isAnyMode = TRUE; |
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277 tmpPattern = pattern; |
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278 break; |
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279 |
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280 case 0: |
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281 if (isAnyMode) { |
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282 if (*str) |
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283 str++; |
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284 else |
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285 isEnd = TRUE; |
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286 } else { |
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287 if (*str) { |
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288 if (tmpPattern) { |
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289 isAnyMode = TRUE; |
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290 pattern = tmpPattern; |
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291 } else |
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292 didMatch = FALSE; |
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293 } else |
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294 isEnd = TRUE; |
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295 } |
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296 break; |
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297 default: |
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298 if (isAnyMode) { |
7 | 299 if (*pattern == *str) { |
0
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300 isAnyMode = FALSE; |
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301 didMatch = TRUE; |
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302 } else { |
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303 if (*str) { |
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304 didMatch = TRUE; |
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305 str++; |
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306 } |
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307 } |
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308 } else { |
7 | 309 if (*pattern == *str) { |
0
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310 didMatch = TRUE; |
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311 if (*pattern) |
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312 pattern++; |
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313 if (*str) |
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314 str++; |
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315 } else { |
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316 if (tmpPattern) { |
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317 didMatch = TRUE; |
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318 isAnyMode = TRUE; |
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319 pattern = tmpPattern; |
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320 } |
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321 } |
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322 } |
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323 |
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324 if (!*str && !*pattern) |
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325 isEnd = TRUE; |
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326 break; |
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327 |
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328 } /* switch */ |
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329 |
7 | 330 } while (didMatch && !isEnd); |
0
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331 |
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332 return didMatch; |
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333 } |
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334 |
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335 |
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336 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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337 */ |
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338 BOOL th_strcasematch(char * str, char * pattern) |
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339 { |
7 | 340 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
341 char *tmpPattern = NULL; | |
0
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342 |
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343 /* Check given pattern and string */ |
7 | 344 if (str == NULL || pattern == NULL) |
0
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345 return FALSE; |
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346 |
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347 /* Start comparision */ |
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348 do { |
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349 switch (*pattern) { |
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350 case '?': |
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351 /* Any single character matches */ |
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352 if (*str) { |
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353 pattern++; |
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354 str++; |
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355 } else |
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356 didMatch = FALSE; |
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357 break; |
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358 |
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359 case '*': |
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360 pattern++; |
7 | 361 if (!*pattern || *pattern == '?') |
0
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362 isEnd = TRUE; |
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363 isAnyMode = TRUE; |
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364 tmpPattern = pattern; |
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365 break; |
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366 |
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367 case 0: |
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368 if (isAnyMode) { |
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369 if (*str) |
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370 str++; |
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371 else |
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372 isEnd = TRUE; |
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373 } else { |
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374 if (*str) { |
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375 if (tmpPattern) { |
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376 isAnyMode = TRUE; |
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377 pattern = tmpPattern; |
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378 } else |
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379 didMatch = FALSE; |
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380 } else |
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381 isEnd = TRUE; |
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382 } |
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383 break; |
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384 |
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385 default: |
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386 if (isAnyMode) { |
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387 if (th_tolower(*pattern) == th_tolower(*str)) { |
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388 isAnyMode = FALSE; |
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389 } else { |
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390 if (*str) |
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391 str++; |
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392 else |
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393 didMatch = FALSE; |
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394 } |
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395 } else { |
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396 if (th_tolower(*pattern) == th_tolower(*str)) { |
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397 if (*pattern) |
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398 pattern++; |
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399 if (*str) |
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400 str++; |
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401 } else { |
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402 if (tmpPattern) { |
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403 isAnyMode = TRUE; |
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404 pattern = tmpPattern; |
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405 } else |
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406 didMatch = FALSE; |
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407 } |
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408 } |
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409 |
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410 if (!*str && !*pattern) |
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411 isEnd = TRUE; |
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412 break; |
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413 |
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414 } /* switch */ |
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415 |
7 | 416 } while (didMatch && !isEnd); |
0
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417 |
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418 return didMatch; |
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419 } |
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420 |