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1 /* <ctype.h> replacement macros.
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2
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145
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3 Copyright (C) 2000-2020 Free Software Foundation, Inc.
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4 Contributed by Zack Weinberg <zackw@stanford.edu>.
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5
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6 This file is part of the libiberty library.
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7 Libiberty is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU Library General Public
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9 License as published by the Free Software Foundation; either
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10 version 2 of the License, or (at your option) any later version.
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11
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12 Libiberty is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 Library General Public License for more details.
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16
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17 You should have received a copy of the GNU Library General Public
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18 License along with libiberty; see the file COPYING.LIB. If
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19 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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20 Boston, MA 02110-1301, USA. */
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21
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22 /*
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23
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24 @defvr Extension HOST_CHARSET
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25 This macro indicates the basic character set and encoding used by the
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26 host: more precisely, the encoding used for character constants in
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27 preprocessor @samp{#if} statements (the C "execution character set").
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28 It is defined by @file{safe-ctype.h}, and will be an integer constant
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29 with one of the following values:
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30
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31 @ftable @code
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32 @item HOST_CHARSET_UNKNOWN
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33 The host character set is unknown - that is, not one of the next two
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34 possibilities.
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35
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36 @item HOST_CHARSET_ASCII
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37 The host character set is ASCII.
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38
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39 @item HOST_CHARSET_EBCDIC
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40 The host character set is some variant of EBCDIC. (Only one of the
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41 nineteen EBCDIC varying characters is tested; exercise caution.)
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42 @end ftable
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43 @end defvr
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44
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45 @deffn Extension ISALPHA (@var{c})
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46 @deffnx Extension ISALNUM (@var{c})
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47 @deffnx Extension ISBLANK (@var{c})
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48 @deffnx Extension ISCNTRL (@var{c})
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49 @deffnx Extension ISDIGIT (@var{c})
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50 @deffnx Extension ISGRAPH (@var{c})
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51 @deffnx Extension ISLOWER (@var{c})
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52 @deffnx Extension ISPRINT (@var{c})
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53 @deffnx Extension ISPUNCT (@var{c})
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54 @deffnx Extension ISSPACE (@var{c})
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55 @deffnx Extension ISUPPER (@var{c})
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56 @deffnx Extension ISXDIGIT (@var{c})
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57
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58 These twelve macros are defined by @file{safe-ctype.h}. Each has the
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59 same meaning as the corresponding macro (with name in lowercase)
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60 defined by the standard header @file{ctype.h}. For example,
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61 @code{ISALPHA} returns true for alphabetic characters and false for
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62 others. However, there are two differences between these macros and
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63 those provided by @file{ctype.h}:
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64
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65 @itemize @bullet
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66 @item These macros are guaranteed to have well-defined behavior for all
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67 values representable by @code{signed char} and @code{unsigned char}, and
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68 for @code{EOF}.
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69
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70 @item These macros ignore the current locale; they are true for these
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71 fixed sets of characters:
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72 @multitable {@code{XDIGIT}} {yada yada yada yada yada yada yada yada}
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73 @item @code{ALPHA} @tab @kbd{A-Za-z}
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74 @item @code{ALNUM} @tab @kbd{A-Za-z0-9}
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75 @item @code{BLANK} @tab @kbd{space tab}
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76 @item @code{CNTRL} @tab @code{!PRINT}
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77 @item @code{DIGIT} @tab @kbd{0-9}
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78 @item @code{GRAPH} @tab @code{ALNUM || PUNCT}
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79 @item @code{LOWER} @tab @kbd{a-z}
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80 @item @code{PRINT} @tab @code{GRAPH ||} @kbd{space}
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81 @item @code{PUNCT} @tab @kbd{`~!@@#$%^&*()_-=+[@{]@}\|;:'",<.>/?}
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82 @item @code{SPACE} @tab @kbd{space tab \n \r \f \v}
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83 @item @code{UPPER} @tab @kbd{A-Z}
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84 @item @code{XDIGIT} @tab @kbd{0-9A-Fa-f}
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85 @end multitable
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86
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87 Note that, if the host character set is ASCII or a superset thereof,
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88 all these macros will return false for all values of @code{char} outside
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89 the range of 7-bit ASCII. In particular, both ISPRINT and ISCNTRL return
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90 false for characters with numeric values from 128 to 255.
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91 @end itemize
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92 @end deffn
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93
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94 @deffn Extension ISIDNUM (@var{c})
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95 @deffnx Extension ISIDST (@var{c})
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96 @deffnx Extension IS_VSPACE (@var{c})
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97 @deffnx Extension IS_NVSPACE (@var{c})
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98 @deffnx Extension IS_SPACE_OR_NUL (@var{c})
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99 @deffnx Extension IS_ISOBASIC (@var{c})
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100 These six macros are defined by @file{safe-ctype.h} and provide
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101 additional character classes which are useful when doing lexical
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102 analysis of C or similar languages. They are true for the following
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103 sets of characters:
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104
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105 @multitable {@code{SPACE_OR_NUL}} {yada yada yada yada yada yada yada yada}
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106 @item @code{IDNUM} @tab @kbd{A-Za-z0-9_}
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107 @item @code{IDST} @tab @kbd{A-Za-z_}
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108 @item @code{VSPACE} @tab @kbd{\r \n}
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109 @item @code{NVSPACE} @tab @kbd{space tab \f \v \0}
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110 @item @code{SPACE_OR_NUL} @tab @code{VSPACE || NVSPACE}
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111 @item @code{ISOBASIC} @tab @code{VSPACE || NVSPACE || PRINT}
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112 @end multitable
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113 @end deffn
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114
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115 */
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116
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117 #include "ansidecl.h"
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118 #include <safe-ctype.h>
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119 #include <stdio.h> /* for EOF */
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120
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121 #if EOF != -1
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122 #error "<safe-ctype.h> requires EOF == -1"
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123 #endif
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124
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125 /* Shorthand */
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126 #define bl _sch_isblank
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127 #define cn _sch_iscntrl
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128 #define di _sch_isdigit
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129 #define is _sch_isidst
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130 #define lo _sch_islower
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131 #define nv _sch_isnvsp
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132 #define pn _sch_ispunct
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133 #define pr _sch_isprint
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134 #define sp _sch_isspace
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135 #define up _sch_isupper
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136 #define vs _sch_isvsp
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137 #define xd _sch_isxdigit
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138
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139 /* Masks. */
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140 #define L (const unsigned short) (lo|is |pr) /* lower case letter */
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141 #define XL (const unsigned short) (lo|is|xd|pr) /* lowercase hex digit */
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142 #define U (const unsigned short) (up|is |pr) /* upper case letter */
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143 #define XU (const unsigned short) (up|is|xd|pr) /* uppercase hex digit */
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144 #define D (const unsigned short) (di |xd|pr) /* decimal digit */
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145 #define P (const unsigned short) (pn |pr) /* punctuation */
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146 #define _ (const unsigned short) (pn|is |pr) /* underscore */
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147
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148 #define C (const unsigned short) ( cn) /* control character */
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149 #define Z (const unsigned short) (nv |cn) /* NUL */
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150 #define M (const unsigned short) (nv|sp |cn) /* cursor movement: \f \v */
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151 #define V (const unsigned short) (vs|sp |cn) /* vertical space: \r \n */
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152 #define T (const unsigned short) (nv|sp|bl|cn) /* tab */
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153 #define S (const unsigned short) (nv|sp|bl|pr) /* space */
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154
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155 /* Are we ASCII? */
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156 #if HOST_CHARSET == HOST_CHARSET_ASCII
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157
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158 const unsigned short _sch_istable[256] =
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159 {
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160 Z, C, C, C, C, C, C, C, /* NUL SOH STX ETX EOT ENQ ACK BEL */
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161 C, T, V, M, M, V, C, C, /* BS HT LF VT FF CR SO SI */
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162 C, C, C, C, C, C, C, C, /* DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
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163 C, C, C, C, C, C, C, C, /* CAN EM SUB ESC FS GS RS US */
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164 S, P, P, P, P, P, P, P, /* SP ! " # $ % & ' */
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165 P, P, P, P, P, P, P, P, /* ( ) * + , - . / */
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166 D, D, D, D, D, D, D, D, /* 0 1 2 3 4 5 6 7 */
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167 D, D, P, P, P, P, P, P, /* 8 9 : ; < = > ? */
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168 P, XU, XU, XU, XU, XU, XU, U, /* @ A B C D E F G */
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169 U, U, U, U, U, U, U, U, /* H I J K L M N O */
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170 U, U, U, U, U, U, U, U, /* P Q R S T U V W */
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171 U, U, U, P, P, P, P, _, /* X Y Z [ \ ] ^ _ */
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172 P, XL, XL, XL, XL, XL, XL, L, /* ` a b c d e f g */
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173 L, L, L, L, L, L, L, L, /* h i j k l m n o */
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174 L, L, L, L, L, L, L, L, /* p q r s t u v w */
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175 L, L, L, P, P, P, P, C, /* x y z { | } ~ DEL */
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176
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177 /* high half of unsigned char is locale-specific, so all tests are
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178 false in "C" locale */
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179 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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180 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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181 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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182 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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183
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184 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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185 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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186 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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187 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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188 };
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189
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190 const unsigned char _sch_tolower[256] =
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191 {
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192 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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193 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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194 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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195 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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196 64,
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197
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198 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
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199 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
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200
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201 91, 92, 93, 94, 95, 96,
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202
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203 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
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204 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
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205
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206 123,124,125,126,127,
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207
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208 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
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209 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
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210 160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
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211 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
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212
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213 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
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214 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
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215 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
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216 240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
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217 };
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218
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219 const unsigned char _sch_toupper[256] =
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220 {
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221 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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222 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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223 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
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224 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
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225 64,
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226
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227 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
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228 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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229
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230 91, 92, 93, 94, 95, 96,
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231
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232 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
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233 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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234
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235 123,124,125,126,127,
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236
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237 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
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238 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
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239 160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
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240 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
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241
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242 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
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243 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
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244 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
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245 240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
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246 };
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247
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248 #else
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249 # if HOST_CHARSET == HOST_CHARSET_EBCDIC
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250 #error "FIXME: write tables for EBCDIC"
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251 # else
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252 #error "Unrecognized host character set"
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253 # endif
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254 #endif
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