1 | /* <ctype.h> replacement macros. |
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2 | |
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3 | Copyright (C) 2000, 2001 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., 59 Temple Place - Suite 330, |
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20 | Boston, MA 02111-1307, USA. */ |
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21 | |
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22 | /* This is a compatible replacement of the standard C library's <ctype.h> |
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23 | with the following properties: |
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24 | |
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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 | |
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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 | |
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35 | #ifndef SAFE_CTYPE_H |
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36 | #define SAFE_CTYPE_H |
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37 | |
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38 | #ifdef isalpha |
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39 | #error "safe-ctype.h and ctype.h may not be used simultaneously" |
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40 | #else |
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41 | |
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42 | /* Categories. */ |
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43 | |
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44 | enum { |
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45 | /* In C99 */ |
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46 | _sch_isblank = 0x0001, /* space \t */ |
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47 | _sch_iscntrl = 0x0002, /* nonprinting characters */ |
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48 | _sch_isdigit = 0x0004, /* 0-9 */ |
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49 | _sch_islower = 0x0008, /* a-z */ |
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50 | _sch_isprint = 0x0010, /* any printing character including ' ' */ |
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51 | _sch_ispunct = 0x0020, /* all punctuation */ |
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52 | _sch_isspace = 0x0040, /* space \t \n \r \f \v */ |
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53 | _sch_isupper = 0x0080, /* A-Z */ |
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54 | _sch_isxdigit = 0x0100, /* 0-9A-Fa-f */ |
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55 | |
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56 | /* Extra categories useful to cpplib. */ |
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57 | _sch_isidst = 0x0200, /* A-Za-z_ */ |
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58 | _sch_isvsp = 0x0400, /* \n \r */ |
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59 | _sch_isnvsp = 0x0800, /* space \t \f \v \0 */ |
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60 | |
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61 | /* Combinations of the above. */ |
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62 | _sch_isalpha = _sch_isupper|_sch_islower, /* A-Za-z */ |
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63 | _sch_isalnum = _sch_isalpha|_sch_isdigit, /* A-Za-z0-9 */ |
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64 | _sch_isidnum = _sch_isidst|_sch_isdigit, /* A-Za-z0-9_ */ |
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65 | _sch_isgraph = _sch_isalnum|_sch_ispunct, /* isprint and not space */ |
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66 | _sch_iscppsp = _sch_isvsp|_sch_isnvsp, /* isspace + \0 */ |
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67 | _sch_isbasic = _sch_isprint|_sch_iscppsp /* basic charset of ISO C |
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68 | (plus ` and @) */ |
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69 | }; |
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70 | |
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71 | /* Character classification. */ |
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72 | extern const unsigned short _sch_istable[256]; |
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73 | |
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74 | #define _sch_test(c, bit) (_sch_istable[(c) & 0xff] & (unsigned short)(bit)) |
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75 | |
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76 | #define ISALPHA(c) _sch_test(c, _sch_isalpha) |
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77 | #define ISALNUM(c) _sch_test(c, _sch_isalnum) |
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78 | #define ISBLANK(c) _sch_test(c, _sch_isblank) |
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79 | #define ISCNTRL(c) _sch_test(c, _sch_iscntrl) |
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80 | #define ISDIGIT(c) _sch_test(c, _sch_isdigit) |
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81 | #define ISGRAPH(c) _sch_test(c, _sch_isgraph) |
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82 | #define ISLOWER(c) _sch_test(c, _sch_islower) |
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83 | #define ISPRINT(c) _sch_test(c, _sch_isprint) |
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84 | #define ISPUNCT(c) _sch_test(c, _sch_ispunct) |
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85 | #define ISSPACE(c) _sch_test(c, _sch_isspace) |
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86 | #define ISUPPER(c) _sch_test(c, _sch_isupper) |
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87 | #define ISXDIGIT(c) _sch_test(c, _sch_isxdigit) |
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88 | |
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89 | #define ISIDNUM(c) _sch_test(c, _sch_isidnum) |
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90 | #define ISIDST(c) _sch_test(c, _sch_isidst) |
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91 | #define IS_ISOBASIC(c) _sch_test(c, _sch_isbasic) |
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92 | #define IS_VSPACE(c) _sch_test(c, _sch_isvsp) |
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93 | #define IS_NVSPACE(c) _sch_test(c, _sch_isnvsp) |
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94 | #define IS_SPACE_OR_NUL(c) _sch_test(c, _sch_iscppsp) |
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95 | |
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96 | /* Character transformation. */ |
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97 | extern const unsigned char _sch_toupper[256]; |
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98 | extern const unsigned char _sch_tolower[256]; |
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99 | #define TOUPPER(c) _sch_toupper[(c) & 0xff] |
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100 | #define TOLOWER(c) _sch_tolower[(c) & 0xff] |
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101 | |
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102 | #endif /* no ctype.h */ |
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103 | #endif /* SAFE_CTYPE_H */ |
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