/** * Character handling in C locale. * * This file is based on gnulib c-ctype.h-dd7a871 with the * other gnulib dependencies removed for use in util-linux. * * These functions work like the corresponding functions in , * except that they have the C (POSIX) locale hardwired, whereas the * functions' behaviour depends on the current locale set via * setlocale. * * Copyright (C) 2000-2003, 2006, 2008-2017 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #ifndef UTIL_LINUX_CCTYPE_H #define UTIL_LINUX_CCTYPE_H /** * The functions defined in this file assume the "C" locale and a character * set without diacritics (ASCII-US or EBCDIC-US or something like that). * Even if the "C" locale on a particular system is an extension of the ASCII * character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it * is ISO-8859-1), the functions in this file recognize only the ASCII * characters. */ #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \ && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \ && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \ && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \ && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \ && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \ && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \ && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \ && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \ && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \ && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \ && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \ && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \ && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \ && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \ && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \ && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \ && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \ && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \ && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \ && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \ && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \ && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126) /* * The character set is ASCII or one of its variants or extensions, not EBCDIC. * Testing the value of '\n' and '\r' is not relevant. */ # define C_CTYPE_ASCII 1 #elif ! (' ' == '\x40' && '0' == '\xf0' \ && 'A' == '\xc1' && 'J' == '\xd1' && 'S' == '\xe2' \ && 'a' == '\x81' && 'j' == '\x91' && 's' == '\xa2') # error "Only ASCII and EBCDIC are supported" #endif #if 'A' < 0 # error "EBCDIC and char is signed -- not supported" #endif /* Cases for control characters. */ #define _C_CTYPE_CNTRL \ case '\a': case '\b': case '\f': case '\n': \ case '\r': case '\t': case '\v': \ _C_CTYPE_OTHER_CNTRL /* ASCII control characters other than those with \-letter escapes. */ #if C_CTYPE_ASCII # define _C_CTYPE_OTHER_CNTRL \ case '\x00': case '\x01': case '\x02': case '\x03': \ case '\x04': case '\x05': case '\x06': case '\x0e': \ case '\x0f': case '\x10': case '\x11': case '\x12': \ case '\x13': case '\x14': case '\x15': case '\x16': \ case '\x17': case '\x18': case '\x19': case '\x1a': \ case '\x1b': case '\x1c': case '\x1d': case '\x1e': \ case '\x1f': case '\x7f' #else /* * Use EBCDIC code page 1047's assignments for ASCII control chars; * assume all EBCDIC code pages agree about these assignments. */ # define _C_CTYPE_OTHER_CNTRL \ case '\x00': case '\x01': case '\x02': case '\x03': \ case '\x07': case '\x0e': case '\x0f': case '\x10': \ case '\x11': case '\x12': case '\x13': case '\x18': \ case '\x19': case '\x1c': case '\x1d': case '\x1e': \ case '\x1f': case '\x26': case '\x27': case '\x2d': \ case '\x2e': case '\x32': case '\x37': case '\x3c': \ case '\x3d': case '\x3f' #endif /* Cases for lowercase hex letters, and lowercase letters, all offset by N. */ #define _C_CTYPE_LOWER_A_THRU_F_N(N) \ case 'a' + (N): case 'b' + (N): case 'c' + (N): case 'd' + (N): \ case 'e' + (N): case 'f' + (N) #define _C_CTYPE_LOWER_N(N) \ _C_CTYPE_LOWER_A_THRU_F_N(N): \ case 'g' + (N): case 'h' + (N): case 'i' + (N): case 'j' + (N): \ case 'k' + (N): case 'l' + (N): case 'm' + (N): case 'n' + (N): \ case 'o' + (N): case 'p' + (N): case 'q' + (N): case 'r' + (N): \ case 's' + (N): case 't' + (N): case 'u' + (N): case 'v' + (N): \ case 'w' + (N): case 'x' + (N): case 'y' + (N): case 'z' + (N) /* Cases for hex letters, digits, lower, punct, and upper. */ #define _C_CTYPE_A_THRU_F \ _C_CTYPE_LOWER_A_THRU_F_N (0): \ _C_CTYPE_LOWER_A_THRU_F_N ('A' - 'a') #define _C_CTYPE_DIGIT \ case '0': case '1': case '2': case '3': \ case '4': case '5': case '6': case '7': \ case '8': case '9' #define _C_CTYPE_LOWER _C_CTYPE_LOWER_N (0) #define _C_CTYPE_PUNCT \ case '!': case '"': case '#': case '$': \ case '%': case '&': case '\'': case '(': \ case ')': case '*': case '+': case ',': \ case '-': case '.': case '/': case ':': \ case ';': case '<': case '=': case '>': \ case '?': case '@': case '[': case '\\': \ case ']': case '^': case '_': case '`': \ case '{': case '|': case '}': case '~' #define _C_CTYPE_UPPER _C_CTYPE_LOWER_N ('A' - 'a') /** * Function definitions. * * Unlike the functions in , which require an argument in the range * of the 'unsigned char' type, the functions here operate on values that are * in the 'unsigned char' range or in the 'char' range. In other words, * when you have a 'char' value, you need to cast it before using it as * argument to a function: * * const char *s = ...; * if (isalpha ((unsigned char) *s)) ... * * but you don't need to cast it for the functions defined in this file: * * const char *s = ...; * if (c_isalpha (*s)) ... */ static inline int c_isalnum (int c) { switch (c) { _C_CTYPE_DIGIT: _C_CTYPE_LOWER: _C_CTYPE_UPPER: return 1; default: return 0; } } static inline int c_isalpha (int c) { switch (c) { _C_CTYPE_LOWER: _C_CTYPE_UPPER: return 1; default: return 0; } } /* The function isascii is not locale dependent. * Its use in EBCDIC is questionable. */ static inline int c_isascii (int c) { switch (c) { case ' ': _C_CTYPE_CNTRL: _C_CTYPE_DIGIT: _C_CTYPE_LOWER: _C_CTYPE_PUNCT: _C_CTYPE_UPPER: return 1; default: return 0; } } static inline int c_isblank (int c) { return c == ' ' || c == '\t'; } static inline int c_iscntrl (int c) { switch (c) { _C_CTYPE_CNTRL: return 1; default: return 0; } } static inline int c_isdigit (int c) { switch (c) { _C_CTYPE_DIGIT: return 1; default: return 0; } } static inline int c_isgraph (int c) { switch (c) { _C_CTYPE_DIGIT: _C_CTYPE_LOWER: _C_CTYPE_PUNCT: _C_CTYPE_UPPER: return 1; default: return 0; } } static inline int c_islower (int c) { switch (c) { _C_CTYPE_LOWER: return 1; default: return 0; } } static inline int c_isprint (int c) { switch (c) { case ' ': _C_CTYPE_DIGIT: _C_CTYPE_LOWER: _C_CTYPE_PUNCT: _C_CTYPE_UPPER: return 1; default: return 0; } } static inline int c_ispunct (int c) { switch (c) { _C_CTYPE_PUNCT: return 1; default: return 0; } } static inline int c_isspace (int c) { switch (c) { case ' ': case '\t': case '\n': case '\v': case '\f': case '\r': return 1; default: return 0; } } static inline int c_isupper (int c) { switch (c) { _C_CTYPE_UPPER: return 1; default: return 0; } } static inline int c_isxdigit (int c) { switch (c) { _C_CTYPE_DIGIT: _C_CTYPE_A_THRU_F: return 1; default: return 0; } } static inline int c_tolower (int c) { switch (c) { _C_CTYPE_UPPER: return c - 'A' + 'a'; default: return c; } } static inline int c_toupper (int c) { switch (c) { _C_CTYPE_LOWER: return c - 'a' + 'A'; default: return c; } } #endif /* UTIL_LINUX_CCTYPE_H */