1 | /**********************************************************************
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2 | regerror.c - Onigmo (Oniguruma-mod) (regular expression library)
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3 | **********************************************************************/
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4 | /*-
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5 | * Copyright (c) 2002-2007 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
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6 | * Copyright (c) 2011-2014 K.Takata <kentkt AT csc DOT jp>
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7 | * All rights reserved.
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8 | *
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9 | * Redistribution and use in source and binary forms, with or without
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10 | * modification, are permitted provided that the following conditions
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11 | * are met:
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12 | * 1. Redistributions of source code must retain the above copyright
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13 | * notice, this list of conditions and the following disclaimer.
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14 | * 2. Redistributions in binary form must reproduce the above copyright
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15 | * notice, this list of conditions and the following disclaimer in the
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16 | * documentation and/or other materials provided with the distribution.
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17 | *
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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28 | * SUCH DAMAGE.
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29 | */
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30 |
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31 | #include "regint.h"
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32 | #include <stdio.h> /* for vsnprintf() */
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33 |
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34 | #ifdef HAVE_STDARG_PROTOTYPES
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35 | #include <stdarg.h>
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36 | #define va_init_list(a,b) va_start(a,b)
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37 | #else
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38 | #include <varargs.h>
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39 | #define va_init_list(a,b) va_start(a)
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40 | #endif
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41 |
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42 | extern UChar*
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43 | onig_error_code_to_format(OnigPosition code)
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44 | {
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45 | const char *p;
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46 |
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47 | if (code >= 0) return (UChar* )0;
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48 |
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49 | switch (code) {
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50 | case ONIG_MISMATCH:
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51 | p = "mismatch"; break;
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52 | case ONIG_NO_SUPPORT_CONFIG:
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53 | p = "no support in this configuration"; break;
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54 | case ONIGERR_MEMORY:
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55 | p = "failed to allocate memory"; break;
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56 | case ONIGERR_TYPE_BUG:
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57 | p = "undefined type (bug)"; break;
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58 | case ONIGERR_PARSER_BUG:
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59 | p = "internal parser error (bug)"; break;
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60 | case ONIGERR_STACK_BUG:
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61 | p = "stack error (bug)"; break;
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62 | case ONIGERR_UNDEFINED_BYTECODE:
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63 | p = "undefined bytecode (bug)"; break;
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64 | case ONIGERR_UNEXPECTED_BYTECODE:
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65 | p = "unexpected bytecode (bug)"; break;
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66 | case ONIGERR_MATCH_STACK_LIMIT_OVER:
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67 | p = "match-stack limit over"; break;
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68 | case ONIGERR_DEFAULT_ENCODING_IS_NOT_SET:
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69 | p = "default multibyte-encoding is not set"; break;
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70 | case ONIGERR_SPECIFIED_ENCODING_CANT_CONVERT_TO_WIDE_CHAR:
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71 | p = "can't convert to wide-char on specified multibyte-encoding"; break;
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72 | case ONIGERR_INVALID_ARGUMENT:
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73 | p = "invalid argument"; break;
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74 | case ONIGERR_END_PATTERN_AT_LEFT_BRACE:
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75 | p = "end pattern at left brace"; break;
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76 | case ONIGERR_END_PATTERN_AT_LEFT_BRACKET:
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77 | p = "end pattern at left bracket"; break;
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78 | case ONIGERR_EMPTY_CHAR_CLASS:
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79 | p = "empty char-class"; break;
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80 | case ONIGERR_PREMATURE_END_OF_CHAR_CLASS:
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81 | p = "premature end of char-class"; break;
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82 | case ONIGERR_END_PATTERN_AT_ESCAPE:
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83 | p = "end pattern at escape"; break;
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84 | case ONIGERR_END_PATTERN_AT_META:
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85 | p = "end pattern at meta"; break;
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86 | case ONIGERR_END_PATTERN_AT_CONTROL:
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87 | p = "end pattern at control"; break;
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88 | case ONIGERR_META_CODE_SYNTAX:
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89 | p = "invalid meta-code syntax"; break;
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90 | case ONIGERR_CONTROL_CODE_SYNTAX:
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91 | p = "invalid control-code syntax"; break;
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92 | case ONIGERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE:
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93 | p = "char-class value at end of range"; break;
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94 | case ONIGERR_CHAR_CLASS_VALUE_AT_START_OF_RANGE:
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95 | p = "char-class value at start of range"; break;
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96 | case ONIGERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS:
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97 | p = "unmatched range specifier in char-class"; break;
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98 | case ONIGERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED:
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99 | p = "target of repeat operator is not specified"; break;
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100 | case ONIGERR_TARGET_OF_REPEAT_OPERATOR_INVALID:
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101 | p = "target of repeat operator is invalid"; break;
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102 | case ONIGERR_NESTED_REPEAT_OPERATOR:
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103 | p = "nested repeat operator"; break;
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104 | case ONIGERR_UNMATCHED_CLOSE_PARENTHESIS:
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105 | p = "unmatched close parenthesis"; break;
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106 | case ONIGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS:
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107 | p = "end pattern with unmatched parenthesis"; break;
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108 | case ONIGERR_END_PATTERN_IN_GROUP:
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109 | p = "end pattern in group"; break;
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110 | case ONIGERR_UNDEFINED_GROUP_OPTION:
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111 | p = "undefined group option"; break;
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112 | case ONIGERR_INVALID_POSIX_BRACKET_TYPE:
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113 | p = "invalid POSIX bracket type"; break;
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114 | case ONIGERR_INVALID_LOOK_BEHIND_PATTERN:
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115 | p = "invalid pattern in look-behind"; break;
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116 | case ONIGERR_INVALID_REPEAT_RANGE_PATTERN:
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117 | p = "invalid repeat range {lower,upper}"; break;
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118 | case ONIGERR_INVALID_CONDITION_PATTERN:
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119 | p = "invalid conditional pattern"; break;
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120 | case ONIGERR_TOO_BIG_NUMBER:
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121 | p = "too big number"; break;
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122 | case ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE:
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123 | p = "too big number for repeat range"; break;
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124 | case ONIGERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE:
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125 | p = "upper is smaller than lower in repeat range"; break;
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126 | case ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS:
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127 | p = "empty range in char class"; break;
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128 | case ONIGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE:
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129 | p = "mismatch multibyte code length in char-class range"; break;
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130 | case ONIGERR_TOO_MANY_MULTI_BYTE_RANGES:
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131 | p = "too many multibyte code ranges are specified"; break;
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132 | case ONIGERR_TOO_SHORT_MULTI_BYTE_STRING:
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133 | p = "too short multibyte code string"; break;
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134 | case ONIGERR_TOO_BIG_BACKREF_NUMBER:
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135 | p = "too big backref number"; break;
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136 | case ONIGERR_INVALID_BACKREF:
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137 | #ifdef USE_NAMED_GROUP
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138 | p = "invalid backref number/name"; break;
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139 | #else
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140 | p = "invalid backref number"; break;
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141 | #endif
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142 | case ONIGERR_NUMBERED_BACKREF_OR_CALL_NOT_ALLOWED:
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143 | p = "numbered backref/call is not allowed. (use name)"; break;
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144 | case ONIGERR_TOO_SHORT_DIGITS:
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145 | p = "too short digits"; break;
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146 | case ONIGERR_TOO_LONG_WIDE_CHAR_VALUE:
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147 | p = "too long wide-char value"; break;
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148 | case ONIGERR_EMPTY_GROUP_NAME:
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149 | p = "group name is empty"; break;
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150 | case ONIGERR_INVALID_GROUP_NAME:
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151 | p = "invalid group name <%n>"; break;
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152 | case ONIGERR_INVALID_CHAR_IN_GROUP_NAME:
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153 | #ifdef USE_NAMED_GROUP
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154 | p = "invalid char in group name <%n>"; break;
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155 | #else
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156 | p = "invalid char in group number <%n>"; break;
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157 | #endif
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158 | case ONIGERR_UNDEFINED_NAME_REFERENCE:
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159 | p = "undefined name <%n> reference"; break;
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160 | case ONIGERR_UNDEFINED_GROUP_REFERENCE:
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161 | p = "undefined group <%n> reference"; break;
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162 | case ONIGERR_MULTIPLEX_DEFINED_NAME:
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163 | p = "multiplex defined name <%n>"; break;
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164 | case ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL:
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165 | p = "multiplex definition name <%n> call"; break;
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166 | case ONIGERR_NEVER_ENDING_RECURSION:
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167 | p = "never ending recursion"; break;
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168 | case ONIGERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY:
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169 | p = "group number is too big for capture history"; break;
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170 | case ONIGERR_INVALID_CHAR_PROPERTY_NAME:
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171 | p = "invalid character property name {%n}"; break;
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172 | case ONIGERR_TOO_MANY_CAPTURE_GROUPS:
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173 | p = "too many capture groups are specified"; break;
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174 | case ONIGERR_INVALID_CODE_POINT_VALUE:
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175 | p = "invalid code point value"; break;
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176 | case ONIGERR_TOO_BIG_WIDE_CHAR_VALUE:
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177 | p = "too big wide-char value"; break;
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178 | case ONIGERR_NOT_SUPPORTED_ENCODING_COMBINATION:
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179 | p = "not supported encoding combination"; break;
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180 | case ONIGERR_INVALID_COMBINATION_OF_OPTIONS:
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181 | p = "invalid combination of options"; break;
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182 | case ONIGERR_OVER_THREAD_PASS_LIMIT_COUNT:
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183 | p = "over thread pass limit count"; break;
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184 |
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185 | default:
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186 | p = "undefined error code"; break;
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187 | }
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188 |
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189 | return (UChar* )p;
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190 | }
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191 |
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192 | static void sprint_byte(char* s, unsigned int v)
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193 | {
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194 | sprintf(s, "%02x", (v & 0377));
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195 | }
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196 |
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197 | static void sprint_byte_with_x(char* s, unsigned int v)
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198 | {
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199 | sprintf(s, "\\x%02x", (v & 0377));
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200 | }
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201 |
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202 | static int to_ascii(OnigEncoding enc, UChar *s, UChar *end,
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203 | UChar buf[], int buf_size, int *is_over)
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204 | {
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205 | int len;
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206 | UChar *p;
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207 | OnigCodePoint code;
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208 |
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209 | if (ONIGENC_MBC_MINLEN(enc) > 1) {
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210 | p = s;
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211 | len = 0;
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212 | while (p < end) {
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213 | code = ONIGENC_MBC_TO_CODE(enc, p, end);
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214 | if (code >= 0x80) {
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215 | if (code > 0xffff && len + 10 <= buf_size) {
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216 | sprint_byte_with_x((char*)(&(buf[len])), (unsigned int)(code >> 24));
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217 | sprint_byte((char*)(&(buf[len+4])), (unsigned int)(code >> 16));
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218 | sprint_byte((char*)(&(buf[len+6])), (unsigned int)(code >> 8));
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219 | sprint_byte((char*)(&(buf[len+8])), (unsigned int)code);
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220 | len += 10;
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221 | }
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222 | else if (len + 6 <= buf_size) {
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223 | sprint_byte_with_x((char*)(&(buf[len])), (unsigned int)(code >> 8));
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224 | sprint_byte((char*)(&(buf[len+4])), (unsigned int)code);
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225 | len += 6;
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226 | }
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227 | else {
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228 | break;
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229 | }
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230 | }
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231 | else {
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232 | buf[len++] = (UChar )code;
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233 | }
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234 |
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235 | p += enclen(enc, p);
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236 | if (len >= buf_size) break;
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237 | }
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238 |
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239 | *is_over = ((p < end) ? 1 : 0);
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240 | }
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241 | else {
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242 | len = (int )MIN((end - s), buf_size);
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243 | xmemcpy(buf, s, (size_t )len);
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244 | *is_over = ((buf_size < (end - s)) ? 1 : 0);
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245 | }
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246 |
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247 | return len;
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248 | }
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249 |
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250 |
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251 | /* for ONIG_MAX_ERROR_MESSAGE_LEN */
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252 | #define MAX_ERROR_PAR_LEN 30
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253 |
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254 | extern int
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255 | #ifdef HAVE_STDARG_PROTOTYPES
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256 | onig_error_code_to_str(UChar* s, OnigPosition code, ...)
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257 | #else
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258 | onig_error_code_to_str(s, code, va_alist)
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259 | UChar* s;
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260 | OnigPosition code;
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261 | va_dcl
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262 | #endif
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263 | {
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264 | UChar *p, *q;
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265 | OnigErrorInfo* einfo;
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266 | size_t len;
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267 | int is_over;
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268 | UChar parbuf[MAX_ERROR_PAR_LEN];
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269 | va_list vargs;
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270 |
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271 | va_init_list(vargs, code);
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272 |
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273 | switch (code) {
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274 | case ONIGERR_UNDEFINED_NAME_REFERENCE:
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275 | case ONIGERR_UNDEFINED_GROUP_REFERENCE:
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276 | case ONIGERR_MULTIPLEX_DEFINED_NAME:
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277 | case ONIGERR_MULTIPLEX_DEFINITION_NAME_CALL:
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278 | case ONIGERR_INVALID_GROUP_NAME:
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279 | case ONIGERR_INVALID_CHAR_IN_GROUP_NAME:
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280 | case ONIGERR_INVALID_CHAR_PROPERTY_NAME:
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281 | einfo = va_arg(vargs, OnigErrorInfo*);
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282 | len = to_ascii(einfo->enc, einfo->par, einfo->par_end,
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283 | parbuf, MAX_ERROR_PAR_LEN - 3, &is_over);
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284 | q = onig_error_code_to_format(code);
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285 | p = s;
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286 | while (*q != '\0') {
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287 | if (*q == '%') {
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288 | q++;
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289 | if (*q == 'n') { /* '%n': name */
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290 | xmemcpy(p, parbuf, len);
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291 | p += len;
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292 | if (is_over != 0) {
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293 | xmemcpy(p, "...", 3);
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294 | p += 3;
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295 | }
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296 | q++;
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297 | }
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298 | else
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299 | goto normal_char;
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300 | }
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301 | else {
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302 | normal_char:
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303 | *p++ = *q++;
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304 | }
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305 | }
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306 | *p = '\0';
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307 | len = p - s;
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308 | break;
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309 |
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310 | default:
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311 | q = onig_error_code_to_format(code);
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312 | if (q) {
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313 | len = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, q);
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314 | xmemcpy(s, q, len);
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315 | } else {
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316 | len = 0;
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317 | }
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318 | s[len] = '\0';
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319 | break;
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320 | }
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321 |
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322 | va_end(vargs);
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323 | return (int )len;
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324 | }
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325 |
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326 |
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327 | void
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328 | #ifdef HAVE_STDARG_PROTOTYPES
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329 | onig_snprintf_with_pattern(UChar buf[], int bufsize, OnigEncoding enc,
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330 | UChar* pat, UChar* pat_end, const UChar *fmt, ...)
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331 | #else
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332 | onig_snprintf_with_pattern(buf, bufsize, enc, pat, pat_end, fmt, va_alist)
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333 | UChar buf[];
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334 | int bufsize;
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335 | OnigEncoding enc;
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336 | UChar* pat;
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337 | UChar* pat_end;
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338 | const UChar *fmt;
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339 | va_dcl
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340 | #endif
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341 | {
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342 | size_t need;
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343 | int n, len;
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344 | UChar *p, *s, *bp;
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345 | UChar bs[6];
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346 | va_list args;
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347 |
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348 | va_init_list(args, fmt);
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349 | n = xvsnprintf((char* )buf, bufsize, (const char* )fmt, args);
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350 | va_end(args);
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351 |
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352 | need = (pat_end - pat) * 4 + 4;
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353 |
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354 | if (n + need < (size_t )bufsize) {
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355 | strcat((char* )buf, ": /");
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356 | s = buf + onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, buf);
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357 |
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358 | p = pat;
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359 | while (p < pat_end) {
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360 | if (*p == '\\') {
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361 | *s++ = *p++;
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362 | len = enclen(enc, p);
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363 | while (len-- > 0) *s++ = *p++;
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364 | }
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365 | else if (*p == '/') {
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366 | *s++ = (unsigned char )'\\';
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367 | *s++ = *p++;
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368 | }
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369 | else if (ONIGENC_IS_MBC_HEAD(enc, p)) {
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370 | len = enclen(enc, p);
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371 | if (ONIGENC_MBC_MINLEN(enc) == 1) {
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372 | while (len-- > 0) *s++ = *p++;
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373 | }
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374 | else { /* for UTF16 */
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375 | int blen;
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376 |
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377 | while (len-- > 0) {
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378 | sprint_byte_with_x((char* )bs, (unsigned int )(*p++));
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379 | blen = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, bs);
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380 | bp = bs;
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381 | while (blen-- > 0) *s++ = *bp++;
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382 | }
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383 | }
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384 | }
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385 | else if (!ONIGENC_IS_CODE_PRINT(enc, *p) &&
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386 | !ONIGENC_IS_CODE_SPACE(enc, *p)) {
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387 | sprint_byte_with_x((char* )bs, (unsigned int )(*p++));
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388 | len = onigenc_str_bytelen_null(ONIG_ENCODING_ASCII, bs);
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389 | bp = bs;
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390 | while (len-- > 0) *s++ = *bp++;
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391 | }
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392 | else {
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393 | *s++ = *p++;
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394 | }
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395 | }
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396 |
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397 | *s++ = '/';
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398 | *s = '\0';
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399 | }
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400 | }
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