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39cd2525 CF |
1 | /* <ctype.h> replacement macros. |
2 | ||
b3adc24a | 3 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
39cd2525 CF |
4 | Contributed by Zack Weinberg <zackw@stanford.edu>. |
5 | ||
6 | This file is part of the libiberty library. | |
7 | Libiberty is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU Library General Public | |
9 | License as published by the Free Software Foundation; either | |
10 | version 2 of the License, or (at your option) any later version. | |
11 | ||
12 | Libiberty is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Library General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Library General Public | |
18 | License along with libiberty; see the file COPYING.LIB. If | |
e172dbf8 NC |
19 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
39cd2525 CF |
21 | |
22 | /* This is a compatible replacement of the standard C library's <ctype.h> | |
23 | with the following properties: | |
24 | ||
25 | - Implements all isxxx() macros required by C99. | |
26 | - Also implements some character classes useful when | |
27 | parsing C-like languages. | |
28 | - Does not change behavior depending on the current locale. | |
29 | - Behaves properly for all values in the range of a signed or | |
30 | unsigned char. | |
31 | ||
32 | To avoid conflicts, this header defines the isxxx functions in upper | |
33 | case, e.g. ISALPHA not isalpha. */ | |
34 | ||
35 | #ifndef SAFE_CTYPE_H | |
36 | #define SAFE_CTYPE_H | |
37 | ||
cbc0188b | 38 | /* Determine host character set. */ |
70ecf948 DD |
39 | #define HOST_CHARSET_UNKNOWN 0 |
40 | #define HOST_CHARSET_ASCII 1 | |
41 | #define HOST_CHARSET_EBCDIC 2 | |
cbc0188b DD |
42 | |
43 | #if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \ | |
44 | && 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 | |
70ecf948 | 45 | # define HOST_CHARSET HOST_CHARSET_ASCII |
39cd2525 | 46 | #else |
cbc0188b DD |
47 | # if '\n' == 0x15 && ' ' == 0x40 && '0' == 0xF0 \ |
48 | && 'A' == 0xC1 && 'a' == 0x81 && '!' == 0x5A | |
70ecf948 | 49 | # define HOST_CHARSET HOST_CHARSET_EBCDIC |
cbc0188b | 50 | # else |
70ecf948 | 51 | # define HOST_CHARSET HOST_CHARSET_UNKNOWN |
cbc0188b DD |
52 | # endif |
53 | #endif | |
39cd2525 CF |
54 | |
55 | /* Categories. */ | |
56 | ||
57 | enum { | |
58 | /* In C99 */ | |
59 | _sch_isblank = 0x0001, /* space \t */ | |
60 | _sch_iscntrl = 0x0002, /* nonprinting characters */ | |
61 | _sch_isdigit = 0x0004, /* 0-9 */ | |
62 | _sch_islower = 0x0008, /* a-z */ | |
63 | _sch_isprint = 0x0010, /* any printing character including ' ' */ | |
64 | _sch_ispunct = 0x0020, /* all punctuation */ | |
65 | _sch_isspace = 0x0040, /* space \t \n \r \f \v */ | |
66 | _sch_isupper = 0x0080, /* A-Z */ | |
67 | _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ | |
68 | ||
69 | /* Extra categories useful to cpplib. */ | |
70 | _sch_isidst = 0x0200, /* A-Za-z_ */ | |
71 | _sch_isvsp = 0x0400, /* \n \r */ | |
72 | _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ | |
73 | ||
74 | /* Combinations of the above. */ | |
75 | _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ | |
76 | _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ | |
77 | _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ | |
78 | _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ | |
e4320fb3 DD |
79 | _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ |
80 | _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C | |
81 | (plus ` and @) */ | |
39cd2525 CF |
82 | }; |
83 | ||
39cd2525 CF |
84 | /* Character classification. */ |
85 | extern const unsigned short _sch_istable[256]; | |
86 | ||
d84829cc | 87 | #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) |
39cd2525 CF |
88 | |
89 | #define ISALPHA(c) _sch_test(c, _sch_isalpha) | |
90 | #define ISALNUM(c) _sch_test(c, _sch_isalnum) | |
91 | #define ISBLANK(c) _sch_test(c, _sch_isblank) | |
92 | #define ISCNTRL(c) _sch_test(c, _sch_iscntrl) | |
93 | #define ISDIGIT(c) _sch_test(c, _sch_isdigit) | |
94 | #define ISGRAPH(c) _sch_test(c, _sch_isgraph) | |
95 | #define ISLOWER(c) _sch_test(c, _sch_islower) | |
96 | #define ISPRINT(c) _sch_test(c, _sch_isprint) | |
97 | #define ISPUNCT(c) _sch_test(c, _sch_ispunct) | |
98 | #define ISSPACE(c) _sch_test(c, _sch_isspace) | |
99 | #define ISUPPER(c) _sch_test(c, _sch_isupper) | |
100 | #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) | |
101 | ||
102 | #define ISIDNUM(c) _sch_test(c, _sch_isidnum) | |
103 | #define ISIDST(c) _sch_test(c, _sch_isidst) | |
e4320fb3 | 104 | #define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) |
39cd2525 CF |
105 | #define IS_VSPACE(c) _sch_test(c, _sch_isvsp) |
106 | #define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) | |
107 | #define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) | |
108 | ||
109 | /* Character transformation. */ | |
110 | extern const unsigned char _sch_toupper[256]; | |
111 | extern const unsigned char _sch_tolower[256]; | |
328cd6e9 DD |
112 | #define TOUPPER(c) _sch_toupper[(c) & 0xff] |
113 | #define TOLOWER(c) _sch_tolower[(c) & 0xff] | |
39cd2525 | 114 | |
d5721fa7 JB |
115 | /* Prevent the users of safe-ctype.h from accidently using the routines |
116 | from ctype.h. Initially, the approach was to produce an error when | |
117 | detecting that ctype.h has been included. But this was causing | |
118 | trouble as ctype.h might get indirectly included as a result of | |
0f963b24 JB |
119 | including another system header (for instance gnulib's stdint.h). |
120 | So we include ctype.h here and then immediately redefine its macros. */ | |
121 | ||
122 | #include <ctype.h> | |
d5721fa7 JB |
123 | #undef isalpha |
124 | #define isalpha(c) do_not_use_isalpha_with_safe_ctype | |
125 | #undef isalnum | |
126 | #define isalnum(c) do_not_use_isalnum_with_safe_ctype | |
127 | #undef iscntrl | |
128 | #define iscntrl(c) do_not_use_iscntrl_with_safe_ctype | |
129 | #undef isdigit | |
130 | #define isdigit(c) do_not_use_isdigit_with_safe_ctype | |
131 | #undef isgraph | |
132 | #define isgraph(c) do_not_use_isgraph_with_safe_ctype | |
133 | #undef islower | |
134 | #define islower(c) do_not_use_islower_with_safe_ctype | |
135 | #undef isprint | |
136 | #define isprint(c) do_not_use_isprint_with_safe_ctype | |
137 | #undef ispunct | |
138 | #define ispunct(c) do_not_use_ispunct_with_safe_ctype | |
139 | #undef isspace | |
140 | #define isspace(c) do_not_use_isspace_with_safe_ctype | |
141 | #undef isupper | |
142 | #define isupper(c) do_not_use_isupper_with_safe_ctype | |
143 | #undef isxdigit | |
144 | #define isxdigit(c) do_not_use_isxdigit_with_safe_ctype | |
145 | #undef toupper | |
146 | #define toupper(c) do_not_use_toupper_with_safe_ctype | |
147 | #undef tolower | |
148 | #define tolower(c) do_not_use_tolower_with_safe_ctype | |
149 | ||
39cd2525 | 150 | #endif /* SAFE_CTYPE_H */ |