1 | /*- |
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2 | * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua> |
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3 | * at Electronni Visti IA, Kiev, Ukraine. |
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4 | * 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 |
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8 | * are met: |
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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 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND |
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16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE |
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19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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25 | * SUCH DAMAGE. |
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26 | */ |
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27 | |
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28 | #include <sys/cdefs.h> |
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29 | |
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30 | #include "namespace.h" |
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31 | #include <rune.h> |
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32 | #include <stdio.h> |
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33 | #include <stdlib.h> |
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34 | #include <string.h> |
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35 | #include <errno.h> |
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36 | #include <unistd.h> |
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37 | #include <sysexits.h> |
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38 | #include "un-namespace.h" |
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39 | |
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40 | #include "collate.h" |
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41 | |
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42 | extern char *_PathLocale; |
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43 | int __collate_load_error = 1; |
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44 | int __collate_substitute_nontrivial; |
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45 | char __collate_version[STR_LEN]; |
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46 | u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN]; |
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47 | struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1]; |
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48 | struct __collate_st_chain_pri __collate_chain_pri_table[TABLE_SIZE]; |
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49 | |
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50 | #define FREAD(a, b, c, d) \ |
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51 | do { \ |
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52 | if (fread(a, b, c, d) != c) { \ |
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53 | fclose(d); \ |
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54 | return -1; \ |
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55 | } \ |
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56 | } while(0) |
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57 | |
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58 | void __collate_err(int ex, const char *f); |
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59 | |
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60 | int |
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61 | __collate_load_tables(encoding) |
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62 | char *encoding; |
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63 | { |
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64 | char buf[PATH_MAX]; |
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65 | FILE *fp; |
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66 | int i, save_load_error; |
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67 | |
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68 | save_load_error = __collate_load_error; |
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69 | __collate_load_error = 1; |
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70 | if (!encoding) { |
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71 | __collate_load_error = save_load_error; |
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72 | return -1; |
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73 | } |
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74 | if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) |
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75 | return 0; |
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76 | if (!_PathLocale) { |
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77 | __collate_load_error = save_load_error; |
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78 | return -1; |
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79 | } |
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80 | /* Range checking not needed, encoding has fixed size */ |
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81 | (void) strcpy(buf, _PathLocale); |
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82 | (void) strcat(buf, "/"); |
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83 | (void) strcat(buf, encoding); |
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84 | (void) strcat(buf, "/LC_COLLATE"); |
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85 | if ((fp = fopen(buf, "r")) == NULL) { |
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86 | __collate_load_error = save_load_error; |
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87 | return -1; |
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88 | } |
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89 | FREAD(__collate_version, sizeof(__collate_version), 1, fp); |
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90 | if (strcmp(__collate_version, COLLATE_VERSION) != 0) { |
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91 | fclose(fp); |
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92 | return -1; |
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93 | } |
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94 | FREAD(__collate_substitute_table, sizeof(__collate_substitute_table), |
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95 | 1, fp); |
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96 | FREAD(__collate_char_pri_table, sizeof(__collate_char_pri_table), 1, |
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97 | fp); |
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98 | FREAD(__collate_chain_pri_table, sizeof(__collate_chain_pri_table), 1, |
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99 | fp); |
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100 | fclose(fp); |
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101 | __collate_load_error = 0; |
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102 | |
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103 | __collate_substitute_nontrivial = 0; |
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104 | for (i = 0; i < UCHAR_MAX + 1; i++) { |
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105 | if (__collate_substitute_table[i][0] != i || |
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106 | __collate_substitute_table[i][1] != 0) { |
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107 | __collate_substitute_nontrivial = 1; |
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108 | break; |
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109 | } |
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110 | } |
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111 | |
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112 | return 0; |
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113 | } |
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114 | |
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115 | u_char * |
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116 | __collate_substitute(s) |
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117 | const u_char *s; |
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118 | { |
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119 | int dest_len, len, nlen; |
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120 | int delta = strlen((const char *) s); |
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121 | u_char *dest_str = NULL; |
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122 | |
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123 | if(s == NULL || *s == '\0') |
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124 | return __collate_strdup((u_char *) ""); |
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125 | delta += delta / 8; |
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126 | dest_str = (u_char *) malloc(dest_len = delta); |
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127 | if(dest_str == NULL) |
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128 | __collate_err(EX_OSERR, __FUNCTION__); |
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129 | len = 0; |
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130 | while(*s) { |
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131 | nlen = len + strlen((const char *) |
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132 | __collate_substitute_table[*s]); |
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133 | if (dest_len <= nlen) { |
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134 | dest_str = reallocf(dest_str, dest_len = nlen + delta); |
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135 | if(dest_str == NULL) |
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136 | __collate_err(EX_OSERR, __FUNCTION__); |
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137 | } |
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138 | strcpy((char *) dest_str + len, |
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139 | (const char *) __collate_substitute_table[*s++]); |
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140 | len = nlen; |
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141 | } |
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142 | return dest_str; |
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143 | } |
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144 | |
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145 | void |
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146 | __collate_lookup(t, len, prim, sec) |
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147 | const u_char *t; |
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148 | int *len, *prim, *sec; |
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149 | { |
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150 | struct __collate_st_chain_pri *p2; |
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151 | |
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152 | *len = 1; |
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153 | *prim = *sec = 0; |
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154 | for(p2 = __collate_chain_pri_table; p2->str[0]; p2++) { |
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155 | if(strncmp((const char *) t, (const char *) p2->str, |
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156 | strlen((const char *) p2->str)) == 0) { |
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157 | *len = strlen((const char *) p2->str); |
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158 | *prim = p2->prim; |
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159 | *sec = p2->sec; |
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160 | return; |
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161 | } |
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162 | } |
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163 | *prim = __collate_char_pri_table[*t].prim; |
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164 | *sec = __collate_char_pri_table[*t].sec; |
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165 | } |
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166 | |
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167 | u_char * |
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168 | __collate_strdup(s) |
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169 | u_char *s; |
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170 | { |
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171 | u_char *t = (u_char *) strdup((const char *) s); |
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172 | |
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173 | if (t == NULL) |
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174 | __collate_err(EX_OSERR, __FUNCTION__); |
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175 | return t; |
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176 | } |
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177 | |
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178 | void |
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179 | __collate_err(int ex, const char *f) |
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180 | { |
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181 | const char *s; |
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182 | int serrno = errno; |
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183 | int dummy; |
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184 | |
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185 | /* Be careful to change write counts if you change the strings */ |
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186 | write(STDERR_FILENO, "collate_error: ", 15); |
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187 | write(STDERR_FILENO, f, strlen(f)); |
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188 | write(STDERR_FILENO, ": ", 2); |
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189 | s = _strerror_r(_REENT, serrno, 1, &dummy); |
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190 | write(STDERR_FILENO, s, strlen(s)); |
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191 | write(STDERR_FILENO, "\n", 1); |
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192 | exit(ex); |
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193 | } |
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194 | |
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195 | #ifdef COLLATE_DEBUG |
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196 | void |
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197 | __collate_print_tables() |
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198 | { |
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199 | int i; |
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200 | struct __collate_st_chain_pri *p2; |
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201 | |
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202 | printf("Substitute table:\n"); |
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203 | for (i = 0; i < UCHAR_MAX + 1; i++) |
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204 | if (i != *__collate_substitute_table[i]) |
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205 | printf("\t'%c' --> \"%s\"\n", i, |
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206 | __collate_substitute_table[i]); |
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207 | printf("Chain priority table:\n"); |
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208 | for (p2 = __collate_chain_pri_table; p2->str[0]; p2++) |
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209 | printf("\t\"%s\" : %d %d\n\n", p2->str, p2->prim, p2->sec); |
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210 | printf("Char priority table:\n"); |
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211 | for (i = 0; i < UCHAR_MAX + 1; i++) |
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212 | printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim, |
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213 | __collate_char_pri_table[i].sec); |
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214 | } |
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215 | #endif |
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