1 | /* Multibyte character data type.
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2 | Copyright (C) 2001, 2005-2006 Free Software Foundation, Inc.
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3 |
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4 | This program is free software; you can redistribute it and/or modify
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5 | it under the terms of the GNU General Public License as published by
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6 | the Free Software Foundation; either version 2, or (at your option)
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7 | any later version.
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8 |
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9 | This program is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | GNU General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU General Public License
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15 | along with this program; if not, write to the Free Software Foundation,
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16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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17 |
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18 | /* Written by Bruno Haible <bruno@clisp.org>. */
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19 |
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20 | /* A multibyte character is a short subsequence of a char* string,
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21 | representing a single wide character.
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22 |
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23 | We use multibyte characters instead of wide characters because of
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24 | the following goals:
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25 | 1) correct multibyte handling, i.e. operate according to the LC_CTYPE
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26 | locale,
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27 | 2) ease of maintenance, i.e. the maintainer needs not know all details
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28 | of the ISO C 99 standard,
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29 | 3) don't fail grossly if the input is not in the encoding set by the
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30 | locale, because often different encodings are in use in the same
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31 | countries (ISO-8859-1/UTF-8, EUC-JP/Shift_JIS, ...),
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32 | 4) fast in the case of ASCII characters,
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33 | 5) portability, i.e. don't make unportable assumptions about wchar_t.
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34 |
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35 | Multibyte characters are only accessed through the mb* macros.
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36 |
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37 | mb_ptr (mbc)
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38 | return a pointer to the beginning of the multibyte sequence.
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39 |
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40 | mb_len (mbc)
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41 | returns the number of bytes occupied by the multibyte sequence.
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42 | Always > 0.
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43 |
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44 | mb_iseq (mbc, sc)
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45 | returns true if mbc is the standard ASCII character sc.
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46 |
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47 | mb_isnul (mbc)
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48 | returns true if mbc is the nul character.
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49 |
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50 | mb_cmp (mbc1, mbc2)
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51 | returns a positive, zero, or negative value depending on whether mbc1
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52 | sorts after, same or before mbc2.
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53 |
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54 | mb_casecmp (mbc1, mbc2)
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55 | returns a positive, zero, or negative value depending on whether mbc1
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56 | sorts after, same or before mbc2, modulo upper/lowercase conversion.
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57 |
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58 | mb_equal (mbc1, mbc2)
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59 | returns true if mbc1 and mbc2 are equal.
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60 |
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61 | mb_caseequal (mbc1, mbc2)
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62 | returns true if mbc1 and mbc2 are equal modulo upper/lowercase conversion.
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63 |
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64 | mb_isalnum (mbc)
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65 | returns true if mbc is alphanumeric.
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66 |
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67 | mb_isalpha (mbc)
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68 | returns true if mbc is alphabetic.
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69 |
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70 | mb_isascii(mbc)
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71 | returns true if mbc is plain ASCII.
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72 |
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73 | mb_isblank (mbc)
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74 | returns true if mbc is a blank.
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75 |
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76 | mb_iscntrl (mbc)
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77 | returns true if mbc is a control character.
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78 |
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79 | mb_isdigit (mbc)
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80 | returns true if mbc is a decimal digit.
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81 |
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82 | mb_isgraph (mbc)
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83 | returns true if mbc is a graphic character.
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84 |
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85 | mb_islower (mbc)
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86 | returns true if mbc is lowercase.
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87 |
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88 | mb_isprint (mbc)
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89 | returns true if mbc is a printable character.
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90 |
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91 | mb_ispunct (mbc)
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92 | returns true if mbc is a punctuation character.
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93 |
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94 | mb_isspace (mbc)
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95 | returns true if mbc is a space character.
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96 |
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97 | mb_isupper (mbc)
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98 | returns true if mbc is uppercase.
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99 |
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100 | mb_isxdigit (mbc)
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101 | returns true if mbc is a hexadecimal digit.
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102 |
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103 | mb_width (mbc)
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104 | returns the number of columns on the output device occupied by mbc.
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105 | Always >= 0.
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106 |
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107 | mb_putc (mbc, stream)
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108 | outputs mbc on stream, a byte oriented FILE stream opened for output.
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109 |
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110 | mb_setascii (&mbc, sc)
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111 | assigns the standard ASCII character sc to mbc.
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112 |
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113 | mb_copy (&destmbc, &srcmbc)
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114 | copies srcmbc to destmbc.
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115 |
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116 | Here are the function prototypes of the macros.
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117 |
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118 | extern const char * mb_ptr (const mbchar_t mbc);
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119 | extern size_t mb_len (const mbchar_t mbc);
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120 | extern bool mb_iseq (const mbchar_t mbc, char sc);
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121 | extern bool mb_isnul (const mbchar_t mbc);
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122 | extern int mb_cmp (const mbchar_t mbc1, const mbchar_t mbc2);
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123 | extern int mb_casecmp (const mbchar_t mbc1, const mbchar_t mbc2);
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124 | extern bool mb_equal (const mbchar_t mbc1, const mbchar_t mbc2);
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125 | extern bool mb_caseequal (const mbchar_t mbc1, const mbchar_t mbc2);
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126 | extern bool mb_isalnum (const mbchar_t mbc);
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127 | extern bool mb_isalpha (const mbchar_t mbc);
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128 | extern bool mb_isascii (const mbchar_t mbc);
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129 | extern bool mb_isblank (const mbchar_t mbc);
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130 | extern bool mb_iscntrl (const mbchar_t mbc);
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131 | extern bool mb_isdigit (const mbchar_t mbc);
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132 | extern bool mb_isgraph (const mbchar_t mbc);
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133 | extern bool mb_islower (const mbchar_t mbc);
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134 | extern bool mb_isprint (const mbchar_t mbc);
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135 | extern bool mb_ispunct (const mbchar_t mbc);
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136 | extern bool mb_isspace (const mbchar_t mbc);
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137 | extern bool mb_isupper (const mbchar_t mbc);
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138 | extern bool mb_isxdigit (const mbchar_t mbc);
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139 | extern int mb_width (const mbchar_t mbc);
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140 | extern void mb_putc (const mbchar_t mbc, FILE *stream);
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141 | extern void mb_setascii (mbchar_t *new, char sc);
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142 | extern void mb_copy (mbchar_t *new, const mbchar_t *old);
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143 | */
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144 |
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145 | #ifndef _MBCHAR_H
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146 | #define _MBCHAR_H 1
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147 |
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148 | #include <stdbool.h>
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149 | #include <string.h>
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150 |
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151 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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152 | <wchar.h>.
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153 | BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
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154 | <wchar.h>. */
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155 | #include <stdio.h>
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156 | #include <time.h>
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157 | #include <wchar.h>
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158 |
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159 | /* BeOS 5 has the functions but no <wctype.h>. */
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160 | #if HAVE_WCTYPE_H
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161 | # include <wctype.h>
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162 | #endif
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163 | /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
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164 | Assume all 12 functions are implemented the same way, or not at all. */
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165 | #if !defined iswalnum && !HAVE_ISWCNTRL
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166 | static inline int
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167 | iswalnum (wint_t wc)
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168 | {
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169 | return (wc >= 0 && wc < 128
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170 | ? (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')
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171 | : 0);
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172 | }
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173 | # define iswalnum iswalnum
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174 | #endif
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175 | #if !defined iswalpha && !HAVE_ISWCNTRL
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176 | static inline int
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177 | iswalpha (wint_t wc)
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178 | {
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179 | return (wc >= 0 && wc < 128
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180 | ? (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'
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181 | : 0);
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182 | }
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183 | # define iswalpha iswalpha
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184 | #endif
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185 | #if !defined iswblank && !HAVE_ISWCNTRL
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186 | static inline int
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187 | iswblank (wint_t wc)
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188 | {
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189 | return (wc >= 0 && wc < 128
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190 | ? wc == ' ' || wc == '\t'
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191 | : 0);
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192 | }
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193 | # define iswblank iswblank
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194 | #endif
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195 | #if !defined iswcntrl && !HAVE_ISWCNTRL
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196 | static inline int
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197 | iswcntrl (wint_t wc)
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198 | {
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199 | return (wc >= 0 && wc < 128
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200 | ? (wc & ~0x1f) == 0 || wc == 0x7f
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201 | : 0);
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202 | }
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203 | # define iswcntrl iswcntrl
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204 | #endif
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205 | #if !defined iswdigit && !HAVE_ISWCNTRL
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206 | static inline int
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207 | iswdigit (wint_t wc)
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208 | {
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209 | return (wc >= '0' && wc <= '9');
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210 | }
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211 | # define iswdigit iswdigit
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212 | #endif
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213 | #if !defined iswgraph && !HAVE_ISWCNTRL
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214 | static inline int
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215 | iswgraph (wint_t wc)
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216 | {
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217 | return (wc >= 0 && wc < 128
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218 | ? wc >= '!' && wc <= '~'
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219 | : 1);
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220 | }
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221 | # define iswgraph iswgraph
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222 | #endif
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223 | #if !defined iswlower && !HAVE_ISWCNTRL
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224 | static inline int
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225 | iswlower (wint_t wc)
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226 | {
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227 | return (wc >= 0 && wc < 128
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228 | ? wc >= 'a' && wc <= 'z'
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229 | : 0);
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230 | }
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231 | # define iswlower iswlower
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232 | #endif
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233 | #if !defined iswprint && !HAVE_ISWCNTRL
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234 | static inline int
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235 | iswprint (wint_t wc)
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236 | {
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237 | return (wc >= 0 && wc < 128
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238 | ? wc >= ' ' && wc <= '~'
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239 | : 1);
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240 | }
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241 | # define iswprint iswprint
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242 | #endif
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243 | #if !defined iswpunct && !HAVE_ISWCNTRL
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244 | static inline int
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245 | iswpunct (wint_t wc)
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246 | {
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247 | return (wc >= 0 && wc < 128
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248 | ? wc >= '!' && wc <= '~'
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249 | && !((wc >= '0' && wc <= '9')
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250 | || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'))
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251 | : 1);
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252 | }
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253 | # define iswpunct iswpunct
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254 | #endif
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255 | #if !defined iswspace && !HAVE_ISWCNTRL
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256 | static inline int
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257 | iswspace (wint_t wc)
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258 | {
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259 | return (wc >= 0 && wc < 128
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260 | ? wc == ' ' || wc == '\t'
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261 | || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r'
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262 | : 0);
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263 | }
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264 | # define iswspace iswspace
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265 | #endif
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266 | #if !defined iswupper && !HAVE_ISWCNTRL
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267 | static inline int
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268 | iswupper (wint_t wc)
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269 | {
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270 | return (wc >= 0 && wc < 128
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271 | ? wc >= 'A' && wc <= 'Z'
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272 | : 0);
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273 | }
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274 | # define iswupper iswupper
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275 | #endif
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276 | #if !defined iswxdigit && !HAVE_ISWCNTRL
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277 | static inline int
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278 | iswxdigit (wint_t wc)
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279 | {
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280 | return (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F');
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281 | }
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282 | # define iswxdigit iswxdigit
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283 | #endif
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284 |
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285 | #include "wcwidth.h"
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286 |
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287 | #define MBCHAR_BUF_SIZE 24
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288 |
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289 | struct mbchar
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290 | {
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291 | const char *ptr; /* pointer to current character */
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292 | size_t bytes; /* number of bytes of current character, > 0 */
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293 | bool wc_valid; /* true if wc is a valid wide character */
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294 | wchar_t wc; /* if wc_valid: the current character */
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295 | char buf[MBCHAR_BUF_SIZE]; /* room for the bytes, used for file input only */
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296 | };
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297 |
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298 | /* EOF (not a real character) is represented with bytes = 0 and
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299 | wc_valid = false. */
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300 |
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301 | typedef struct mbchar mbchar_t;
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302 |
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303 | /* Access the current character. */
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304 | #define mb_ptr(mbc) ((mbc).ptr)
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305 | #define mb_len(mbc) ((mbc).bytes)
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306 |
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307 | /* Comparison of characters. */
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308 | #define mb_iseq(mbc, sc) ((mbc).wc_valid && (mbc).wc == (sc))
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309 | #define mb_isnul(mbc) ((mbc).wc_valid && (mbc).wc == 0)
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310 | #define mb_cmp(mbc1, mbc2) \
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311 | ((mbc1).wc_valid \
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312 | ? ((mbc2).wc_valid \
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313 | ? (int) (mbc1).wc - (int) (mbc2).wc \
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314 | : -1) \
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315 | : ((mbc2).wc_valid \
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316 | ? 1 \
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317 | : (mbc1).bytes == (mbc2).bytes \
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318 | ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
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319 | : (mbc1).bytes < (mbc2).bytes \
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320 | ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
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321 | : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
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322 | #define mb_casecmp(mbc1, mbc2) \
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323 | ((mbc1).wc_valid \
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324 | ? ((mbc2).wc_valid \
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325 | ? (int) towlower ((mbc1).wc) - (int) towlower ((mbc2).wc) \
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326 | : -1) \
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327 | : ((mbc2).wc_valid \
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328 | ? 1 \
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329 | : (mbc1).bytes == (mbc2).bytes \
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330 | ? memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) \
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331 | : (mbc1).bytes < (mbc2).bytes \
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332 | ? (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) > 0 ? 1 : -1) \
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333 | : (memcmp ((mbc1).ptr, (mbc2).ptr, (mbc2).bytes) >= 0 ? 1 : -1)))
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334 | #define mb_equal(mbc1, mbc2) \
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335 | ((mbc1).wc_valid && (mbc2).wc_valid \
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336 | ? (mbc1).wc == (mbc2).wc \
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337 | : (mbc1).bytes == (mbc2).bytes \
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338 | && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
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339 | #define mb_caseequal(mbc1, mbc2) \
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340 | ((mbc1).wc_valid && (mbc2).wc_valid \
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341 | ? towlower ((mbc1).wc) == towlower ((mbc2).wc) \
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342 | : (mbc1).bytes == (mbc2).bytes \
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343 | && memcmp ((mbc1).ptr, (mbc2).ptr, (mbc1).bytes) == 0)
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344 |
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345 | /* <ctype.h>, <wctype.h> classification. */
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346 | #define mb_isascii(mbc) \
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347 | ((mbc).wc_valid && (mbc).wc >= 0 && (mbc).wc <= 127)
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348 | #define mb_isalnum(mbc) ((mbc).wc_valid && iswalnum ((mbc).wc))
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349 | #define mb_isalpha(mbc) ((mbc).wc_valid && iswalpha ((mbc).wc))
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350 | #define mb_isblank(mbc) ((mbc).wc_valid && iswblank ((mbc).wc))
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351 | #define mb_iscntrl(mbc) ((mbc).wc_valid && iswcntrl ((mbc).wc))
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352 | #define mb_isdigit(mbc) ((mbc).wc_valid && iswdigit ((mbc).wc))
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353 | #define mb_isgraph(mbc) ((mbc).wc_valid && iswgraph ((mbc).wc))
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354 | #define mb_islower(mbc) ((mbc).wc_valid && iswlower ((mbc).wc))
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355 | #define mb_isprint(mbc) ((mbc).wc_valid && iswprint ((mbc).wc))
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356 | #define mb_ispunct(mbc) ((mbc).wc_valid && iswpunct ((mbc).wc))
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357 | #define mb_isspace(mbc) ((mbc).wc_valid && iswspace ((mbc).wc))
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358 | #define mb_isupper(mbc) ((mbc).wc_valid && iswupper ((mbc).wc))
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359 | #define mb_isxdigit(mbc) ((mbc).wc_valid && iswxdigit ((mbc).wc))
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360 |
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361 | /* Extra <wchar.h> function. */
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362 |
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363 | /* Unprintable characters appear as a small box of width 1. */
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364 | #define MB_UNPRINTABLE_WIDTH 1
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365 |
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366 | static inline int
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367 | mb_width_aux (wint_t wc)
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368 | {
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369 | int w = wcwidth (wc);
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370 | /* For unprintable characters, arbitrarily return 0 for control characters
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371 | and MB_UNPRINTABLE_WIDTH otherwise. */
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372 | return (w >= 0 ? w : iswcntrl (wc) ? 0 : MB_UNPRINTABLE_WIDTH);
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373 | }
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374 |
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375 | #define mb_width(mbc) \
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376 | ((mbc).wc_valid ? mb_width_aux ((mbc).wc) : MB_UNPRINTABLE_WIDTH)
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377 |
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378 | /* Output. */
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379 | #define mb_putc(mbc, stream) fwrite ((mbc).ptr, 1, (mbc).bytes, (stream))
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380 |
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381 | /* Assignment. */
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382 | #define mb_setascii(mbc, sc) \
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383 | ((mbc)->ptr = (mbc)->buf, (mbc)->bytes = 1, (mbc)->wc_valid = 1, \
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384 | (mbc)->wc = (mbc)->buf[0] = (sc))
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385 |
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386 | /* Copying a character. */
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387 | static inline void
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388 | mb_copy (mbchar_t *new_mbc, const mbchar_t *old_mbc)
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389 | {
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390 | if (old_mbc->ptr == &old_mbc->buf[0])
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391 | {
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392 | memcpy (&new_mbc->buf[0], &old_mbc->buf[0], old_mbc->bytes);
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393 | new_mbc->ptr = &new_mbc->buf[0];
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394 | }
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395 | else
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396 | new_mbc->ptr = old_mbc->ptr;
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397 | new_mbc->bytes = old_mbc->bytes;
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398 | if ((new_mbc->wc_valid = old_mbc->wc_valid))
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399 | new_mbc->wc = old_mbc->wc;
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400 | }
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401 |
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402 |
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403 | /* is_basic(c) tests whether the single-byte character c is in the
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404 | ISO C "basic character set".
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405 | This is a convenience function, and is in this file only to share code
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406 | between mbiter_multi.h and mbfile_multi.h. */
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407 | #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
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408 | && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
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409 | && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
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410 | && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
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411 | && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
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412 | && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
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413 | && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
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414 | && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
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415 | && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
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416 | && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
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417 | && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
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418 | && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
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419 | && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
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420 | && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
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421 | && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
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422 | && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
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423 | && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
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424 | && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
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425 | && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
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426 | && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
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427 | && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
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428 | && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
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429 | && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
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430 | /* The character set is ISO-646, not EBCDIC. */
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431 | # define IS_BASIC_ASCII 1
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432 |
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433 | extern const unsigned int is_basic_table[];
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434 |
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435 | static inline bool
|
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436 | is_basic (char c)
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437 | {
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438 | return (is_basic_table [(unsigned char) c >> 5] >> ((unsigned char) c & 31))
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439 | & 1;
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440 | }
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441 |
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442 | #else
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443 |
|
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444 | static inline bool
|
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445 | is_basic (char c)
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446 | {
|
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447 | switch (c)
|
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448 | {
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449 | case '\t': case '\v': case '\f':
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450 | case ' ': case '!': case '"': case '#': case '%':
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451 | case '&': case '\'': case '(': case ')': case '*':
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452 | case '+': case ',': case '-': case '.': case '/':
|
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453 | case '0': case '1': case '2': case '3': case '4':
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454 | case '5': case '6': case '7': case '8': case '9':
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455 | case ':': case ';': case '<': case '=': case '>':
|
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456 | case '?':
|
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457 | case 'A': case 'B': case 'C': case 'D': case 'E':
|
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458 | case 'F': case 'G': case 'H': case 'I': case 'J':
|
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459 | case 'K': case 'L': case 'M': case 'N': case 'O':
|
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460 | case 'P': case 'Q': case 'R': case 'S': case 'T':
|
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461 | case 'U': case 'V': case 'W': case 'X': case 'Y':
|
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462 | case 'Z':
|
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463 | case '[': case '\\': case ']': case '^': case '_':
|
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464 | case 'a': case 'b': case 'c': case 'd': case 'e':
|
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465 | case 'f': case 'g': case 'h': case 'i': case 'j':
|
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466 | case 'k': case 'l': case 'm': case 'n': case 'o':
|
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467 | case 'p': case 'q': case 'r': case 's': case 't':
|
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468 | case 'u': case 'v': case 'w': case 'x': case 'y':
|
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469 | case 'z': case '{': case '|': case '}': case '~':
|
---|
470 | return 1;
|
---|
471 | default:
|
---|
472 | return 0;
|
---|
473 | }
|
---|
474 | }
|
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475 |
|
---|
476 | #endif
|
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477 |
|
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478 | #endif /* _MBCHAR_H */
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