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5191 | serge | 1 | /* |
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6324 | serge | 3 | Copyright (C) 2000-2015 Free Software Foundation, Inc. |
5191 | serge | 4 | Contributed by Zack Weinberg |
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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 | |||
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 | |||
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 | |||
22 | /* This is a compatible replacement of the standard C library's |
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23 | with the following properties: |
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24 | |||
25 | - Implements all isxxx() macros required by C99. |
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26 | - Also implements some character classes useful when |
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27 | parsing C-like languages. |
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28 | - Does not change behavior depending on the current locale. |
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29 | - Behaves properly for all values in the range of a signed or |
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30 | unsigned char. |
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31 | |||
32 | To avoid conflicts, this header defines the isxxx functions in upper |
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33 | case, e.g. ISALPHA not isalpha. */ |
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34 | |||
35 | #ifndef SAFE_CTYPE_H |
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36 | #define SAFE_CTYPE_H |
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37 | |||
38 | /* Determine host character set. */ |
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39 | #define HOST_CHARSET_UNKNOWN 0 |
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40 | #define HOST_CHARSET_ASCII 1 |
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41 | #define HOST_CHARSET_EBCDIC 2 |
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42 | |||
43 | #if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ |
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44 | && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 |
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45 | # define HOST_CHARSET HOST_CHARSET_ASCII |
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46 | #else |
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47 | # if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \ |
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48 | && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A |
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49 | # define HOST_CHARSET HOST_CHARSET_EBCDIC |
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50 | # else |
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51 | # define HOST_CHARSET HOST_CHARSET_UNKNOWN |
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52 | # endif |
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53 | #endif |
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54 | |||
55 | /* Categories. */ |
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56 | |||
57 | enum { |
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58 | /* In C99 */ |
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59 | _sch_isblank = 0x0001, /* space \t */ |
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60 | _sch_iscntrl = 0x0002, /* nonprinting characters */ |
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61 | _sch_isdigit = 0x0004, /* 0-9 */ |
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62 | _sch_islower = 0x0008, /* a-z */ |
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63 | _sch_isprint = 0x0010, /* any printing character including ' ' */ |
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64 | _sch_ispunct = 0x0020, /* all punctuation */ |
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65 | _sch_isspace = 0x0040, /* space \t \n \r \f \v */ |
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66 | _sch_isupper = 0x0080, /* A-Z */ |
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67 | _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ |
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68 | |||
69 | /* Extra categories useful to cpplib. */ |
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70 | _sch_isidst = 0x0200, /* A-Za-z_ */ |
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71 | _sch_isvsp = 0x0400, /* \n \r */ |
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72 | _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ |
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73 | |||
74 | /* Combinations of the above. */ |
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75 | _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ |
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76 | _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ |
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77 | _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ |
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78 | _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ |
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79 | _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ |
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80 | _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C |
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81 | (plus ` and @) */ |
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82 | }; |
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83 | |||
84 | /* Character classification. */ |
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85 | extern const unsigned short _sch_istable[256]; |
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86 | |||
87 | #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) |
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88 | |||
89 | #define ISALPHA(c) _sch_test(c, _sch_isalpha) |
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90 | #define ISALNUM(c) _sch_test(c, _sch_isalnum) |
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91 | #define ISBLANK(c) _sch_test(c, _sch_isblank) |
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92 | #define ISCNTRL(c) _sch_test(c, _sch_iscntrl) |
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93 | #define ISDIGIT(c) _sch_test(c, _sch_isdigit) |
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94 | #define ISGRAPH(c) _sch_test(c, _sch_isgraph) |
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95 | #define ISLOWER(c) _sch_test(c, _sch_islower) |
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96 | #define ISPRINT(c) _sch_test(c, _sch_isprint) |
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97 | #define ISPUNCT(c) _sch_test(c, _sch_ispunct) |
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98 | #define ISSPACE(c) _sch_test(c, _sch_isspace) |
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99 | #define ISUPPER(c) _sch_test(c, _sch_isupper) |
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100 | #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) |
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101 | |||
102 | #define ISIDNUM(c) _sch_test(c, _sch_isidnum) |
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103 | #define ISIDST(c) _sch_test(c, _sch_isidst) |
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104 | #define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) |
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105 | #define IS_VSPACE(c) _sch_test(c, _sch_isvsp) |
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106 | #define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) |
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107 | #define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) |
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108 | |||
109 | /* Character transformation. */ |
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110 | extern const unsigned char _sch_toupper[256]; |
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111 | extern const unsigned char _sch_tolower[256]; |
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112 | #define TOUPPER(c) _sch_toupper[(c) & 0xff] |
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113 | #define TOLOWER(c) _sch_tolower[(c) & 0xff] |
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114 | |||
115 | /* Prevent the users of safe-ctype.h from accidently using the routines |
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116 | from ctype.h. Initially, the approach was to produce an error when |
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117 | detecting that ctype.h has been included. But this was causing |
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118 | trouble as ctype.h might get indirectly included as a result of |
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119 | including another system header (for instance gnulib's stdint.h). |
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120 | So we include ctype.h here and then immediately redefine its macros. */ |
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121 | |||
122 | #include |
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123 | #undef isalpha |
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124 | #define isalpha(c) do_not_use_isalpha_with_safe_ctype |
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125 | #undef isalnum |
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126 | #define isalnum(c) do_not_use_isalnum_with_safe_ctype |
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127 | #undef iscntrl |
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128 | #define iscntrl(c) do_not_use_iscntrl_with_safe_ctype |
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129 | #undef isdigit |
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130 | #define isdigit(c) do_not_use_isdigit_with_safe_ctype |
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131 | #undef isgraph |
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132 | #define isgraph(c) do_not_use_isgraph_with_safe_ctype |
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133 | #undef islower |
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134 | #define islower(c) do_not_use_islower_with_safe_ctype |
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135 | #undef isprint |
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136 | #define isprint(c) do_not_use_isprint_with_safe_ctype |
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137 | #undef ispunct |
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138 | #define ispunct(c) do_not_use_ispunct_with_safe_ctype |
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139 | #undef isspace |
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140 | #define isspace(c) do_not_use_isspace_with_safe_ctype |
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141 | #undef isupper |
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142 | #define isupper(c) do_not_use_isupper_with_safe_ctype |
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143 | #undef isxdigit |
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144 | #define isxdigit(c) do_not_use_isxdigit_with_safe_ctype |
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145 | #undef toupper |
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146 | #define toupper(c) do_not_use_toupper_with_safe_ctype |
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147 | #undef tolower |
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148 | #define tolower(c) do_not_use_tolower_with_safe_ctype |
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149 | |||
150 | #endif /* SAFE_CTYPE_H */ |