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366 lines
9.3 KiB
366 lines
9.3 KiB
/* Character handling in C locale. |
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These functions work like the corresponding functions in <ctype.h>, |
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except that they have the C (POSIX) locale hardwired, whereas the |
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<ctype.h> functions' behaviour depends on the current locale set via |
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setlocale. |
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Copyright (C) 2000-2003, 2006, 2008-2017 Free Software Foundation, Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
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#ifndef C_CTYPE_H |
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#define C_CTYPE_H |
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#include <stdbool.h> |
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#ifndef _GL_INLINE_HEADER_BEGIN |
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#error "Please include config.h first." |
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#endif |
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_GL_INLINE_HEADER_BEGIN |
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#ifndef C_CTYPE_INLINE |
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# define C_CTYPE_INLINE _GL_INLINE |
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#endif |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* The functions defined in this file assume the "C" locale and a character |
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set without diacritics (ASCII-US or EBCDIC-US or something like that). |
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Even if the "C" locale on a particular system is an extension of the ASCII |
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character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it |
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is ISO-8859-1), the functions in this file recognize only the ASCII |
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characters. */ |
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#if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \ |
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&& ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \ |
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&& (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \ |
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&& ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \ |
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&& ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \ |
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&& ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \ |
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&& ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \ |
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&& ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \ |
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&& ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \ |
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&& ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \ |
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&& ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \ |
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&& ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \ |
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&& ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \ |
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&& ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \ |
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&& ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \ |
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&& ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \ |
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&& ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \ |
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&& ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \ |
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&& ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \ |
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&& ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \ |
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&& ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \ |
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&& ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \ |
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&& ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126) |
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/* The character set is ASCII or one of its variants or extensions, not EBCDIC. |
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Testing the value of '\n' and '\r' is not relevant. */ |
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# define C_CTYPE_ASCII 1 |
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#elif ! (' ' == '\x40' && '0' == '\xf0' \ |
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&& 'A' == '\xc1' && 'J' == '\xd1' && 'S' == '\xe2' \ |
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&& 'a' == '\x81' && 'j' == '\x91' && 's' == '\xa2') |
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# error "Only ASCII and EBCDIC are supported" |
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#endif |
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#if 'A' < 0 |
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# error "EBCDIC and char is signed -- not supported" |
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#endif |
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/* Cases for control characters. */ |
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#define _C_CTYPE_CNTRL \ |
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case '\a': case '\b': case '\f': case '\n': \ |
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case '\r': case '\t': case '\v': \ |
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_C_CTYPE_OTHER_CNTRL |
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/* ASCII control characters other than those with \-letter escapes. */ |
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#if C_CTYPE_ASCII |
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# define _C_CTYPE_OTHER_CNTRL \ |
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case '\x00': case '\x01': case '\x02': case '\x03': \ |
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case '\x04': case '\x05': case '\x06': case '\x0e': \ |
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case '\x0f': case '\x10': case '\x11': case '\x12': \ |
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case '\x13': case '\x14': case '\x15': case '\x16': \ |
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case '\x17': case '\x18': case '\x19': case '\x1a': \ |
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case '\x1b': case '\x1c': case '\x1d': case '\x1e': \ |
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case '\x1f': case '\x7f' |
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#else |
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/* Use EBCDIC code page 1047's assignments for ASCII control chars; |
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assume all EBCDIC code pages agree about these assignments. */ |
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# define _C_CTYPE_OTHER_CNTRL \ |
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case '\x00': case '\x01': case '\x02': case '\x03': \ |
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case '\x07': case '\x0e': case '\x0f': case '\x10': \ |
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case '\x11': case '\x12': case '\x13': case '\x18': \ |
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case '\x19': case '\x1c': case '\x1d': case '\x1e': \ |
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case '\x1f': case '\x26': case '\x27': case '\x2d': \ |
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case '\x2e': case '\x32': case '\x37': case '\x3c': \ |
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case '\x3d': case '\x3f' |
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#endif |
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/* Cases for lowercase hex letters, and lowercase letters, all offset by N. */ |
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#define _C_CTYPE_LOWER_A_THRU_F_N(n) \ |
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case 'a' + (n): case 'b' + (n): case 'c' + (n): case 'd' + (n): \ |
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case 'e' + (n): case 'f' + (n) |
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#define _C_CTYPE_LOWER_N(n) \ |
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_C_CTYPE_LOWER_A_THRU_F_N(n): \ |
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case 'g' + (n): case 'h' + (n): case 'i' + (n): case 'j' + (n): \ |
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case 'k' + (n): case 'l' + (n): case 'm' + (n): case 'n' + (n): \ |
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case 'o' + (n): case 'p' + (n): case 'q' + (n): case 'r' + (n): \ |
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case 's' + (n): case 't' + (n): case 'u' + (n): case 'v' + (n): \ |
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case 'w' + (n): case 'x' + (n): case 'y' + (n): case 'z' + (n) |
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/* Cases for hex letters, digits, lower, punct, and upper. */ |
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#define _C_CTYPE_A_THRU_F \ |
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_C_CTYPE_LOWER_A_THRU_F_N (0): \ |
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_C_CTYPE_LOWER_A_THRU_F_N ('A' - 'a') |
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#define _C_CTYPE_DIGIT \ |
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case '0': case '1': case '2': case '3': \ |
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case '4': case '5': case '6': case '7': \ |
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case '8': case '9' |
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#define _C_CTYPE_LOWER _C_CTYPE_LOWER_N (0) |
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#define _C_CTYPE_PUNCT \ |
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case '!': case '"': case '#': case '$': \ |
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case '%': case '&': case '\'': case '(': \ |
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case ')': case '*': case '+': case ',': \ |
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case '-': case '.': case '/': case ':': \ |
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case ';': case '<': case '=': case '>': \ |
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case '?': case '@': case '[': case '\\': \ |
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case ']': case '^': case '_': case '`': \ |
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case '{': case '|': case '}': case '~' |
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#define _C_CTYPE_UPPER _C_CTYPE_LOWER_N ('A' - 'a') |
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/* Function definitions. */ |
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/* Unlike the functions in <ctype.h>, which require an argument in the range |
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of the 'unsigned char' type, the functions here operate on values that are |
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in the 'unsigned char' range or in the 'char' range. In other words, |
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when you have a 'char' value, you need to cast it before using it as |
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argument to a <ctype.h> function: |
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const char *s = ...; |
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if (isalpha ((unsigned char) *s)) ... |
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but you don't need to cast it for the functions defined in this file: |
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const char *s = ...; |
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if (c_isalpha (*s)) ... |
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*/ |
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C_CTYPE_INLINE bool |
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c_isalnum (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_DIGIT: |
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_C_CTYPE_LOWER: |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isalpha (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_LOWER: |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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/* The function isascii is not locale dependent. |
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Its use in EBCDIC is questionable. */ |
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C_CTYPE_INLINE bool |
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c_isascii (int c) |
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{ |
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switch (c) |
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{ |
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case ' ': |
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_C_CTYPE_CNTRL: |
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_C_CTYPE_DIGIT: |
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_C_CTYPE_LOWER: |
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_C_CTYPE_PUNCT: |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isblank (int c) |
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{ |
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return c == ' ' || c == '\t'; |
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} |
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C_CTYPE_INLINE bool |
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c_iscntrl (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_CNTRL: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isdigit (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_DIGIT: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isgraph (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_DIGIT: |
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_C_CTYPE_LOWER: |
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_C_CTYPE_PUNCT: |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_islower (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_LOWER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isprint (int c) |
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{ |
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switch (c) |
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{ |
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case ' ': |
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_C_CTYPE_DIGIT: |
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_C_CTYPE_LOWER: |
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_C_CTYPE_PUNCT: |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_ispunct (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_PUNCT: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isspace (int c) |
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{ |
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switch (c) |
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{ |
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case ' ': case '\t': case '\n': case '\v': case '\f': case '\r': |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isupper (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_UPPER: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE bool |
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c_isxdigit (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_DIGIT: |
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_C_CTYPE_A_THRU_F: |
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return true; |
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default: |
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return false; |
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} |
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} |
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C_CTYPE_INLINE int |
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c_tolower (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_UPPER: |
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return c - 'A' + 'a'; |
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default: |
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return c; |
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} |
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} |
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C_CTYPE_INLINE int |
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c_toupper (int c) |
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{ |
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switch (c) |
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{ |
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_C_CTYPE_LOWER: |
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return c - 'a' + 'A'; |
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default: |
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return c; |
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} |
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} |
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#ifdef __cplusplus |
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} |
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#endif |
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_GL_INLINE_HEADER_END |
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#endif /* C_CTYPE_H */
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