Mercurial > hg > th-libs
annotate th_string.c @ 8:acc2a8035dd5
Re-add th_strdup().
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 24 Dec 2008 16:03:04 +0200 |
parents | 41885619fc79 |
children | a25f5d22483e |
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 |
8 | 16 |
17 /* strdup with a NULL check | |
18 */ | |
19 char *th_strdup(const char *s) | |
20 { | |
21 char *res; | |
22 if (s == NULL) | |
23 return NULL; | |
24 | |
25 if ((res = th_malloc(strlen(s) + 1)) == NULL) | |
26 return NULL; | |
27 | |
28 strcpy(res, s); | |
29 return res; | |
30 } | |
31 | |
32 | |
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33 /* Allocate memory for a string with given length |
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34 */ |
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35 char *th_stralloc(const size_t l) |
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36 { |
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37 assert(l > 0); |
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38 return th_malloc(sizeof(char) * l); |
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39 } |
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40 |
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41 |
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42 char *th_strrealloc(char * s, const size_t l) |
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43 { |
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44 assert(l > 0); |
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45 return th_realloc(s, sizeof(char) * l); |
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46 } |
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47 |
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48 |
7 | 49 char *th_strncpy(char * dst, const char * src, size_t n) |
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50 { |
7 | 51 const char *s = src; |
52 char *d = dst; | |
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53 size_t i; |
7 | 54 assert(src != NULL); |
55 assert(dst != NULL); | |
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56 |
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57 /* Copy to the destination */ |
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58 i = n; |
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59 while (*s && (i > 0)) { |
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60 *(d++) = *(s++); |
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61 i--; |
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62 } |
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63 |
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64 /* Fill rest of space with zeros */ |
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65 while (i > 0) { |
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66 *(d++) = 0; |
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67 i--; |
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68 } |
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69 |
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70 /* Ensure that last is always zero */ |
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71 dst[n - 1] = 0; |
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72 |
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73 return dst; |
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74 } |
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75 |
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76 |
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77 int th_strncmp(char * str1, char * str2, size_t n) |
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78 { |
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79 char *s1, *s2; |
7 | 80 assert(str1 != NULL); |
81 assert(str2 != NULL); | |
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82 |
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83 /* Check the string pointers */ |
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84 if (str1 == str2) |
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85 return 0; |
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86 |
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87 /* Go through the string */ |
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88 s1 = str1; |
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89 s2 = str2; |
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90 while ((n > 0) && *s1 && *s2 && (*s1 == *s2)) { |
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91 s1++; |
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92 s2++; |
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93 n--; |
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94 } |
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95 |
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96 if (n > 0) |
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97 return ((*s1) - (*s2)); |
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98 else |
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99 return 0; |
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100 } |
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101 |
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102 |
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103 /* Compare two strings ignoring case [strcasecmp, strncasecmp] |
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104 */ |
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105 int th_strcasecmp(char * str1, char * str2) |
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106 { |
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107 char *s1 = str1, *s2 = str2; |
7 | 108 assert(str1 != NULL); |
109 assert(str2 != NULL); | |
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110 |
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111 /* Check the string pointers */ |
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112 if (str1 == str2) |
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113 return 0; |
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114 |
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115 /* Go through the string */ |
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116 while (*s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { |
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117 s1++; |
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118 s2++; |
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119 } |
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120 |
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121 return (th_tolower(*s1) - th_tolower(*s2)); |
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122 } |
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123 |
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124 |
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125 int th_strncasecmp(char * str1, char * str2, size_t n) |
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126 { |
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127 char *s1 = str1, *s2 = str2; |
7 | 128 assert(str1 != NULL); |
129 assert(str2 != NULL); | |
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130 |
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131 /* Check the string pointers */ |
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132 if (str1 == str2) |
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133 return 0; |
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134 |
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135 /* Go through the string */ |
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136 while ((n > 0) && *s1 && *s2 && (th_tolower(*s1) == th_tolower(*s2))) { |
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137 s1++; |
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138 s2++; |
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139 n--; |
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140 } |
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141 |
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142 if (n > 0) |
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143 return (th_tolower(*s1) - th_tolower(*s2)); |
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144 else |
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145 return 0; |
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146 } |
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147 |
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148 |
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149 /* Remove all occurences of control characters, in-place. |
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150 * Resulting string is always shorter or same length than original. |
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151 */ |
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152 void th_strip_ctrlchars(char * str) |
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153 { |
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154 char *i, *j; |
7 | 155 assert(str != NULL); |
0
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156 |
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157 i = str; |
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158 j = str; |
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159 while (*i) { |
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160 if (!th_iscntrl(*i)) |
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161 *(j++) = *i; |
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162 i++; |
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163 } |
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164 |
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165 *j = 0; |
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166 } |
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167 |
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168 |
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169 /* Copy a given string over in *result. |
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170 */ |
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171 int th_pstrcpy(char ** result, char * str) |
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172 { |
7 | 173 assert(result != NULL); |
0
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174 |
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175 /* Check the string pointers */ |
7 | 176 if (str == NULL) |
0
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177 return -1; |
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178 |
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179 /* Allocate memory for destination */ |
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180 th_free(*result); |
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181 *result = th_stralloc(strlen(str) + 1); |
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182 if (!*result) |
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183 return -2; |
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184 |
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185 /* Copy to the destination */ |
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186 strcpy(*result, str); |
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187 |
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188 return 0; |
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189 } |
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190 |
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191 |
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192 /* Concatenates a given string into string pointed by *result. |
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193 */ |
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194 int th_pstrcat(char ** result, char * str) |
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195 { |
7 | 196 assert(result != NULL); |
0
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197 |
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198 /* Check the string pointers */ |
7 | 199 if (str == NULL) |
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200 return -1; |
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201 |
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202 if (*result != NULL) { |
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203 *result = th_strrealloc(*result, strlen(*result) + strlen(str) + 1); |
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204 if (*result == NULL) |
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205 return -1; |
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206 |
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207 strcat(*result, str); |
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208 } else { |
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209 *result = th_stralloc(strlen(str) + 1); |
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210 if (*result == NULL) |
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211 return -1; |
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212 |
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213 strcpy(*result, str); |
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214 } |
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215 |
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216 return 0; |
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217 } |
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218 |
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219 |
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220 /* Find next non-whitespace character in string. |
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221 * Updates iPos into the position of such character and |
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222 * returns pointer to the string. |
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223 */ |
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224 char *th_findnext(char * str, size_t * iPos) |
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225 { |
7 | 226 assert(str != NULL); |
0
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227 |
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228 /* Terminating NULL-character is not whitespace! */ |
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229 while (th_isspace(str[*iPos])) |
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230 (*iPos)++; |
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231 return &str[*iPos]; |
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232 } |
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233 |
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234 |
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235 /* Find next chSep-character from string |
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236 */ |
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237 char *th_findsep(char * str, size_t * iPos, char chSep) |
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238 { |
7 | 239 assert(str != NULL); |
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240 |
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241 /* Terminating NULL-character is not digit! */ |
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242 while (str[*iPos] && (str[*iPos] != chSep)) |
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243 (*iPos)++; |
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244 return &str[*iPos]; |
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245 } |
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246 |
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247 |
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248 /* Find next chSep- or whitespace from string |
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249 */ |
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250 char *th_findseporspace(char * str, size_t * iPos, char chSep) |
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251 { |
7 | 252 assert(str != NULL); |
0
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253 |
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254 /* Terminating NULL-character is not digit! */ |
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255 while (!th_isspace(str[*iPos]) && (str[*iPos] != chSep)) |
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256 (*iPos)++; |
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257 return &str[*iPos]; |
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258 } |
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259 |
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260 |
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261 /* Compare a string to a pattern. Case-SENSITIVE version. |
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262 * The matching pattern can consist of any normal characters plus |
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263 * wildcards ? and *. "?" matches any character and "*" matches |
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264 * any number of characters. |
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265 */ |
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266 BOOL th_strmatch(char * str, char * pattern) |
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267 { |
7 | 268 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
269 char *tmpPattern = NULL; | |
0
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270 |
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271 /* Check given pattern and string */ |
7 | 272 if (str == NULL || pattern == NULL) |
0
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273 return FALSE; |
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274 |
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275 /* Start comparision */ |
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276 do { |
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277 didMatch = FALSE; |
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278 switch (*pattern) { |
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279 case '?': |
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280 /* Any single character matches */ |
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281 if (*str) { |
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282 didMatch = TRUE; |
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283 pattern++; |
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284 str++; |
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285 } |
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286 break; |
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287 |
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288 case '*': |
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289 didMatch = TRUE; |
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290 pattern++; |
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291 if (!*pattern) |
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292 isEnd = TRUE; |
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293 isAnyMode = TRUE; |
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294 tmpPattern = pattern; |
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295 break; |
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296 |
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297 case 0: |
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298 if (isAnyMode) { |
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299 if (*str) |
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300 str++; |
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301 else |
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302 isEnd = TRUE; |
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303 } else { |
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304 if (*str) { |
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305 if (tmpPattern) { |
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306 isAnyMode = TRUE; |
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307 pattern = tmpPattern; |
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308 } else |
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309 didMatch = FALSE; |
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310 } else |
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311 isEnd = TRUE; |
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312 } |
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313 break; |
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314 default: |
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315 if (isAnyMode) { |
7 | 316 if (*pattern == *str) { |
0
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317 isAnyMode = FALSE; |
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318 didMatch = TRUE; |
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319 } else { |
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320 if (*str) { |
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321 didMatch = TRUE; |
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322 str++; |
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323 } |
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324 } |
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325 } else { |
7 | 326 if (*pattern == *str) { |
0
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327 didMatch = TRUE; |
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328 if (*pattern) |
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329 pattern++; |
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330 if (*str) |
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331 str++; |
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332 } else { |
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333 if (tmpPattern) { |
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334 didMatch = TRUE; |
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335 isAnyMode = TRUE; |
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336 pattern = tmpPattern; |
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337 } |
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338 } |
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339 } |
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340 |
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341 if (!*str && !*pattern) |
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342 isEnd = TRUE; |
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343 break; |
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344 |
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345 } /* switch */ |
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346 |
7 | 347 } while (didMatch && !isEnd); |
0
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348 |
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349 return didMatch; |
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350 } |
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351 |
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352 |
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353 /* Compare a string to a pattern. Case-INSENSITIVE version. |
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354 */ |
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355 BOOL th_strcasematch(char * str, char * pattern) |
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356 { |
7 | 357 BOOL didMatch = TRUE, isAnyMode = FALSE, isEnd = FALSE; |
358 char *tmpPattern = NULL; | |
0
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359 |
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360 /* Check given pattern and string */ |
7 | 361 if (str == NULL || pattern == NULL) |
0
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362 return FALSE; |
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363 |
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364 /* Start comparision */ |
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365 do { |
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366 switch (*pattern) { |
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367 case '?': |
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368 /* Any single character matches */ |
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369 if (*str) { |
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370 pattern++; |
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371 str++; |
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372 } else |
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373 didMatch = FALSE; |
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374 break; |
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375 |
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376 case '*': |
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377 pattern++; |
7 | 378 if (!*pattern || *pattern == '?') |
0
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379 isEnd = TRUE; |
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380 isAnyMode = TRUE; |
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381 tmpPattern = pattern; |
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382 break; |
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383 |
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384 case 0: |
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385 if (isAnyMode) { |
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386 if (*str) |
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387 str++; |
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388 else |
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389 isEnd = TRUE; |
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390 } else { |
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391 if (*str) { |
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392 if (tmpPattern) { |
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393 isAnyMode = TRUE; |
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394 pattern = tmpPattern; |
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395 } else |
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396 didMatch = FALSE; |
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397 } else |
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398 isEnd = TRUE; |
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399 } |
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400 break; |
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401 |
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402 default: |
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403 if (isAnyMode) { |
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404 if (th_tolower(*pattern) == th_tolower(*str)) { |
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405 isAnyMode = FALSE; |
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406 } else { |
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407 if (*str) |
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408 str++; |
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409 else |
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410 didMatch = FALSE; |
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411 } |
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412 } else { |
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413 if (th_tolower(*pattern) == th_tolower(*str)) { |
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414 if (*pattern) |
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415 pattern++; |
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416 if (*str) |
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417 str++; |
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418 } else { |
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419 if (tmpPattern) { |
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420 isAnyMode = TRUE; |
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421 pattern = tmpPattern; |
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422 } else |
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423 didMatch = FALSE; |
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424 } |
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425 } |
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426 |
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427 if (!*str && !*pattern) |
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428 isEnd = TRUE; |
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429 break; |
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430 |
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431 } /* switch */ |
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432 |
7 | 433 } while (didMatch && !isEnd); |
0
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434 |
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435 return didMatch; |
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436 } |
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437 |