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1 /* chardefs.h -- Character definitions for readline. */
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2
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3 /* Copyright (C) 1994-2021 Free Software Foundation, Inc.
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4
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5 This file is part of the GNU Readline Library (Readline), a library
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6 for reading lines of text with interactive input and history editing.
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7
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8 Readline is free software: you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation, either version 3 of the License, or
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11 (at your option) any later version.
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12
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13 Readline is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Readline. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #ifndef _CHARDEFS_H_
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23 #define _CHARDEFS_H_
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24
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25 #include <ctype.h>
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26
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27 #if defined (HAVE_CONFIG_H)
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28 # if defined (HAVE_STRING_H)
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29 # include <string.h>
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30 # endif /* HAVE_STRING_H */
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31 # if defined (HAVE_STRINGS_H)
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32 # include <strings.h>
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33 # endif /* HAVE_STRINGS_H */
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34 #else
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35 # include <string.h>
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36 #endif /* !HAVE_CONFIG_H */
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37
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38 #ifndef whitespace
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39 #define whitespace(c) (((c) == ' ') || ((c) == '\t'))
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40 #endif
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41
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42 #ifdef CTRL
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43 # undef CTRL
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44 #endif
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45 #ifdef UNCTRL
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46 # undef UNCTRL
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47 #endif
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48
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49 /* Some character stuff. */
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50 #define control_character_threshold 0x020 /* Smaller than this is control. */
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51 #define control_character_mask 0x1f /* 0x20 - 1 */
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52 #define meta_character_threshold 0x07f /* Larger than this is Meta. */
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53 #define control_character_bit 0x40 /* 0x000000, must be off. */
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54 #define meta_character_bit 0x080 /* x0000000, must be on. */
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55 #define largest_char 255 /* Largest character value. */
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56
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57 #define CTRL_CHAR(c) ((c) < control_character_threshold && (((c) & 0x80) == 0))
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58 #define META_CHAR(c) ((c) > meta_character_threshold && (c) <= largest_char)
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59
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60 #define CTRL(c) ((c) & control_character_mask)
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61 #define META(c) ((c) | meta_character_bit)
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62
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63 #define UNMETA(c) ((c) & (~meta_character_bit))
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64 #define UNCTRL(c) _rl_to_upper(((c)|control_character_bit))
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65
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66 #ifndef UCHAR_MAX
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67 # define UCHAR_MAX 255
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68 #endif
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69 #ifndef CHAR_MAX
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70 # define CHAR_MAX 127
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71 #endif
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72
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73 /* use this as a proxy for C89 */
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74 #if defined (HAVE_STDLIB_H) && defined (HAVE_STRING_H)
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75 # define IN_CTYPE_DOMAIN(c) 1
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76 # define NON_NEGATIVE(c) 1
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77 #else
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78 # define IN_CTYPE_DOMAIN(c) ((c) >= 0 && (c) <= CHAR_MAX)
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79 # define NON_NEGATIVE(c) ((unsigned char)(c) == (c))
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80 #endif
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81
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82 #if !defined (isxdigit) && !defined (HAVE_ISXDIGIT) && !defined (__cplusplus)
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83 # define isxdigit(c) (isdigit((unsigned char)(c)) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
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84 #endif
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85
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86 /* Some systems define these; we want our definitions. */
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87 #undef ISPRINT
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88
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89 /* Beware: these only work with single-byte ASCII characters. */
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90
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91 #define ISALNUM(c) (IN_CTYPE_DOMAIN (c) && isalnum ((unsigned char)c))
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92 #define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha ((unsigned char)c))
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93 #define ISDIGIT(c) (IN_CTYPE_DOMAIN (c) && isdigit ((unsigned char)c))
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94 #define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower ((unsigned char)c))
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95 #define ISPRINT(c) (IN_CTYPE_DOMAIN (c) && isprint ((unsigned char)c))
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96 #define ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper ((unsigned char)c))
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97 #define ISXDIGIT(c) (IN_CTYPE_DOMAIN (c) && isxdigit ((unsigned char)c))
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98
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99 #define _rl_lowercase_p(c) (NON_NEGATIVE(c) && ISLOWER(c))
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100 #define _rl_uppercase_p(c) (NON_NEGATIVE(c) && ISUPPER(c))
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101 #define _rl_digit_p(c) ((c) >= '0' && (c) <= '9')
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102
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103 #define _rl_alphabetic_p(c) (NON_NEGATIVE(c) && ISALNUM(c))
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104 #define _rl_pure_alphabetic(c) (NON_NEGATIVE(c) && ISALPHA(c))
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105
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106 #ifndef _rl_to_upper
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107 # define _rl_to_upper(c) (_rl_lowercase_p(c) ? toupper((unsigned char)(c)) : (c))
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108 # define _rl_to_lower(c) (_rl_uppercase_p(c) ? tolower((unsigned char)(c)) : (c))
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109 #endif
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110
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111 #ifndef _rl_digit_value
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112 # define _rl_digit_value(x) ((x) - '0')
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113 #endif
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114
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115 #ifndef _rl_isident
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116 # define _rl_isident(c) (ISALNUM(c) || (c) == '_')
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117 #endif
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118
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119 #ifndef ISOCTAL
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120 # define ISOCTAL(c) ((c) >= '0' && (c) <= '7')
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121 #endif
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122 #define OCTVALUE(c) ((c) - '0')
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123
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124 #define HEXVALUE(c) \
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125 (((c) >= 'a' && (c) <= 'f') \
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126 ? (c)-'a'+10 \
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127 : (c) >= 'A' && (c) <= 'F' ? (c)-'A'+10 : (c)-'0')
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128
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129 #ifndef NEWLINE
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130 #define NEWLINE '\n'
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131 #endif
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132
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133 #ifndef RETURN
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134 #define RETURN CTRL('M')
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135 #endif
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136
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137 #ifndef RUBOUT
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138 #define RUBOUT 0x7f
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139 #endif
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140
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141 #ifndef TAB
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142 #define TAB '\t'
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143 #endif
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144
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145 #ifdef ABORT_CHAR
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146 #undef ABORT_CHAR
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147 #endif
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148 #define ABORT_CHAR CTRL('G')
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149
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150 #ifdef PAGE
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151 #undef PAGE
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152 #endif
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153 #define PAGE CTRL('L')
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154
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155 #ifdef SPACE
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156 #undef SPACE
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157 #endif
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158 #define SPACE ' ' /* XXX - was 0x20 */
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159
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160 #ifdef ESC
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161 #undef ESC
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162 #endif
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163 #define ESC CTRL('[')
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164
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165 #endif /* _CHARDEFS_H_ */
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