annotate lib/c-ctype.h @ 16366:bb182ee4a09d

maint: replace FSF snail-mail addresses with URLs * config/argz.mk, lib/accept4.c, lib/alignof.h, lib/alloca.in.h: * lib/alphasort.c, lib/arcfour.c, lib/arcfour.h, lib/arctwo.c: * lib/arctwo.h, lib/argz.c, lib/arpa_inet.in.h, lib/asnprintf.c: * lib/asprintf.c, lib/assert.in.h, lib/base32.c, lib/base32.h: * lib/base64.c, lib/base64.h, lib/c-ctype.c, lib/c-ctype.h: * lib/c-strcase.h, lib/c-strcasecmp.c, lib/c-strncasecmp.c: * lib/check-version.c, lib/check-version.h, lib/config.charset: * lib/ctype.in.h, lib/des.c, lib/des.h, lib/dup3.c, lib/errno.in.h: * lib/float+.h, lib/fnmatch.c, lib/fnmatch.in.h, lib/fnmatch_loop.c: * lib/fseeko.c, lib/gai_strerror.c, lib/gc-gnulib.c: * lib/gc-libgcrypt.c, lib/gc-pbkdf2-sha1.c, lib/gc.h: * lib/getaddrinfo.c, lib/getdelim.c, lib/getfilecon.c, lib/getline.c: * lib/getlogin_r.c, lib/getpass.c, lib/getpass.h, lib/gettext.h: * lib/gettimeofday.c, lib/glob.in.h, lib/glthread/cond.c: * lib/glthread/cond.h, lib/glthread/lock.c, lib/glthread/lock.h: * lib/glthread/thread.c, lib/glthread/thread.h: * lib/glthread/threadlib.c, lib/glthread/yield.h, lib/hmac-md5.c: * lib/hmac-sha1.c, lib/hmac.h, lib/iconv.c, lib/iconv.in.h: * lib/iconv_close.c, lib/iconv_open.c, lib/inet_ntop.c, lib/isfinite.c: * lib/isinf.c, lib/iswblank.c, lib/langinfo.in.h, lib/link.c: * lib/localcharset.c, lib/localcharset.h, lib/lseek.c, lib/malloc.c: * lib/malloca.c, lib/malloca.h, lib/md2.c, lib/md2.h, lib/md4.c: * lib/md4.h, lib/md5.c, lib/md5.h, lib/memmem.c, lib/mempcpy.c: * lib/memset.c, lib/memxor.c, lib/memxor.h, lib/minmax.h, lib/mktime.c: * lib/msvc-inval.c, lib/msvc-inval.h, lib/msvc-nothrow.c: * lib/msvc-nothrow.h, lib/netdb.in.h, lib/netinet_in.in.h, lib/nproc.c: * lib/nproc.h, lib/obstack_printf.c, lib/pathmax.h, lib/pipe.c: * lib/pipe2.c, lib/poll.c, lib/poll.in.h, lib/printf-args.c: * lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h: * lib/pselect.c, lib/pthread.in.h, lib/pty-private.h, lib/pty.in.h: * lib/read-file.c, lib/read-file.h, lib/ref-add.sin, lib/ref-del.sin: * lib/regcomp.c, lib/regex.c, lib/regex.h, lib/regex_internal.c: * lib/regex_internal.h, lib/regexec.c, lib/rijndael-alg-fst.c: * lib/rijndael-alg-fst.h, lib/rijndael-api-fst.c: * lib/rijndael-api-fst.h, lib/rint.c, lib/rintf.c, lib/rintl.c: * lib/round.c, lib/roundf.c, lib/roundl.c, lib/scandir.c, lib/select.c: * lib/sha1.c, lib/sha1.h, lib/size_max.h, lib/snprintf.c: * lib/stdalign.in.h, lib/stdarg.in.h, lib/stdbool.in.h: * lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/str-kmp.h: * lib/str-two-way.h, lib/strcasecmp.c, lib/strcasestr.c, lib/strdup.c: * lib/striconv.c, lib/striconv.h, lib/string.in.h, lib/strings.in.h: * lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/strpbrk.c: * lib/strptime.c, lib/strsep.c, lib/strstr.c, lib/strverscmp.c: * lib/sys_file.in.h, lib/sys_ioctl.in.h, lib/sys_select.in.h: * lib/sys_socket.in.h, lib/sys_stat.in.h, lib/sys_time.in.h: * lib/sys_times.in.h, lib/sys_types.in.h, lib/sys_uio.in.h: * lib/sys_utsname.in.h, lib/sys_wait.in.h, lib/tcgetsid.c: * lib/termios.in.h, lib/time.in.h, lib/time_r.c, lib/timegm.c: * lib/times.c, lib/unictype/3level.h, lib/unictype/3levelbit.h: * lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/vasprintf.c: * lib/vsnprintf.c, lib/waitpid.c, lib/wchar.in.h, lib/wctype.in.h: * lib/xsize.h, tests/test-closein.c, tests/test-des.c: * tests/test-fclose.c, tests/test-fgetc.c, tests/test-filevercmp.c: * tests/test-fputc.c, tests/test-fread.c, tests/test-fwrite.c: * tests/test-gc-arcfour.c, tests/test-gc-arctwo.c, tests/test-gc-des.c: * tests/test-gc-hmac-md5.c, tests/test-gc-hmac-sha1.c: * tests/test-gc-md2.c, tests/test-gc-md4.c, tests/test-gc-md5.c: * tests/test-gc-pbkdf2-sha1.c, tests/test-gc-rijndael.c: * tests/test-gc-sha1.c, tests/test-gc.c, tests/test-getdelim.c: * tests/test-getline.c, tests/test-getndelim2.c, tests/test-md2.c: * tests/test-md4.c, tests/test-parse-datetime.c, tests/test-perror.c: * tests/test-perror2.c, tests/test-pipe.c, tests/test-pipe2.c: * tests/test-poll.c, tests/test-quotearg-simple.c: * tests/test-quotearg.c, tests/test-quotearg.h: * tests/test-round-ieee.c, tests/test-round1.c: * tests/test-roundf-ieee.c, tests/test-roundf1.c: * tests/test-roundl-ieee.c, tests/test-roundl.c: * tests/test-safe-alloc.c, tests/test-sigpipe.c: * tests/test-spawn-pipe-child.c, tests/test-spawn-pipe-main.c: * tests/test-strerror.c, tests/test-strerror_r.c: * tests/test-strsignal.c, tests/test-strverscmp.c: * tests/test-xmemdup0.c: Replace FSF snail mail addresses with URLs, as per GNU coding standards. See glibc bug <http://sourceware.org/bugzilla/show_bug.cgi?id=13673>.
author Paul Eggert <eggert@cs.ucla.edu>
date Thu, 09 Feb 2012 21:39:05 -0800
parents 8250f2777afc
children e542fd46ad6f
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1 /* Character handling in C locale.
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2
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3 These functions work like the corresponding functions in <ctype.h>,
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4 except that they have the C (POSIX) locale hardwired, whereas the
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5 <ctype.h> functions' behaviour depends on the current locale set via
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6 setlocale.
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7
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8 Copyright (C) 2000-2003, 2006, 2008-2012 Free Software Foundation, Inc.
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9
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10 This program is free software; you can redistribute it and/or modify
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11 it under the terms of the GNU General Public License as published by
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12 the Free Software Foundation; either version 2 of the License, or
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13 (at your option) any later version.
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14
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15 This program is distributed in the hope that it will be useful,
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16 but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 GNU General Public License for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with this program; if not, see <http://www.gnu.org/licenses/>. */
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22
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23 #ifndef C_CTYPE_H
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24 #define C_CTYPE_H
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25
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26 #include <stdbool.h>
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27
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28
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29 #ifdef __cplusplus
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30 extern "C" {
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31 #endif
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32
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33
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34 /* The functions defined in this file assume the "C" locale and a character
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35 set without diacritics (ASCII-US or EBCDIC-US or something like that).
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36 Even if the "C" locale on a particular system is an extension of the ASCII
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37 character set (like on BeOS, where it is UTF-8, or on AmigaOS, where it
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38 is ISO-8859-1), the functions in this file recognize only the ASCII
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39 characters. */
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40
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41
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42 /* Check whether the ASCII optimizations apply. */
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43
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44 /* ANSI C89 (and ISO C99 5.2.1.3 too) already guarantees that
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45 '0', '1', ..., '9' have consecutive integer values. */
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46 #define C_CTYPE_CONSECUTIVE_DIGITS 1
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47
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48 #if ('A' <= 'Z') \
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49 && ('A' + 1 == 'B') && ('B' + 1 == 'C') && ('C' + 1 == 'D') \
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50 && ('D' + 1 == 'E') && ('E' + 1 == 'F') && ('F' + 1 == 'G') \
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51 && ('G' + 1 == 'H') && ('H' + 1 == 'I') && ('I' + 1 == 'J') \
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52 && ('J' + 1 == 'K') && ('K' + 1 == 'L') && ('L' + 1 == 'M') \
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53 && ('M' + 1 == 'N') && ('N' + 1 == 'O') && ('O' + 1 == 'P') \
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54 && ('P' + 1 == 'Q') && ('Q' + 1 == 'R') && ('R' + 1 == 'S') \
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55 && ('S' + 1 == 'T') && ('T' + 1 == 'U') && ('U' + 1 == 'V') \
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56 && ('V' + 1 == 'W') && ('W' + 1 == 'X') && ('X' + 1 == 'Y') \
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57 && ('Y' + 1 == 'Z')
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58 #define C_CTYPE_CONSECUTIVE_UPPERCASE 1
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59 #endif
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60
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61 #if ('a' <= 'z') \
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62 && ('a' + 1 == 'b') && ('b' + 1 == 'c') && ('c' + 1 == 'd') \
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63 && ('d' + 1 == 'e') && ('e' + 1 == 'f') && ('f' + 1 == 'g') \
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64 && ('g' + 1 == 'h') && ('h' + 1 == 'i') && ('i' + 1 == 'j') \
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65 && ('j' + 1 == 'k') && ('k' + 1 == 'l') && ('l' + 1 == 'm') \
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66 && ('m' + 1 == 'n') && ('n' + 1 == 'o') && ('o' + 1 == 'p') \
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67 && ('p' + 1 == 'q') && ('q' + 1 == 'r') && ('r' + 1 == 's') \
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68 && ('s' + 1 == 't') && ('t' + 1 == 'u') && ('u' + 1 == 'v') \
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69 && ('v' + 1 == 'w') && ('w' + 1 == 'x') && ('x' + 1 == 'y') \
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70 && ('y' + 1 == 'z')
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71 #define C_CTYPE_CONSECUTIVE_LOWERCASE 1
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72 #endif
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73
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74 #if (' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
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75 && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
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76 && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
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77 && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
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78 && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
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79 && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
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80 && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
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81 && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
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82 && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
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83 && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
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84 && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
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85 && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
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86 && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
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87 && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
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88 && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
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89 && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
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90 && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
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91 && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
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92 && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
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93 && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
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94 && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
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95 && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
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96 && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126)
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97 /* The character set is ASCII or one of its variants or extensions, not EBCDIC.
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98 Testing the value of '\n' and '\r' is not relevant. */
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99 #define C_CTYPE_ASCII 1
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100 #endif
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101
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102
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103 /* Function declarations. */
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104
10572
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105 /* Unlike the functions in <ctype.h>, which require an argument in the range
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106 of the 'unsigned char' type, the functions here operate on values that are
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107 in the 'unsigned char' range or in the 'char' range. In other words,
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108 when you have a 'char' value, you need to cast it before using it as
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109 argument to a <ctype.h> function:
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110
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111 const char *s = ...;
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112 if (isalpha ((unsigned char) *s)) ...
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113
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114 but you don't need to cast it for the functions defined in this file:
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115
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116 const char *s = ...;
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117 if (c_isalpha (*s)) ...
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118 */
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119
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120 extern bool c_isascii (int c) _GL_ATTRIBUTE_CONST; /* not locale dependent */
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121
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122 extern bool c_isalnum (int c) _GL_ATTRIBUTE_CONST;
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123 extern bool c_isalpha (int c) _GL_ATTRIBUTE_CONST;
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124 extern bool c_isblank (int c) _GL_ATTRIBUTE_CONST;
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125 extern bool c_iscntrl (int c) _GL_ATTRIBUTE_CONST;
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126 extern bool c_isdigit (int c) _GL_ATTRIBUTE_CONST;
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127 extern bool c_islower (int c) _GL_ATTRIBUTE_CONST;
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128 extern bool c_isgraph (int c) _GL_ATTRIBUTE_CONST;
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129 extern bool c_isprint (int c) _GL_ATTRIBUTE_CONST;
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130 extern bool c_ispunct (int c) _GL_ATTRIBUTE_CONST;
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131 extern bool c_isspace (int c) _GL_ATTRIBUTE_CONST;
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132 extern bool c_isupper (int c) _GL_ATTRIBUTE_CONST;
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133 extern bool c_isxdigit (int c) _GL_ATTRIBUTE_CONST;
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134
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135 extern int c_tolower (int c) _GL_ATTRIBUTE_CONST;
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136 extern int c_toupper (int c) _GL_ATTRIBUTE_CONST;
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137
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138
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139 #if defined __GNUC__ && defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ && !defined NO_C_CTYPE_MACROS
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140
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141 /* ASCII optimizations. */
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142
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143 #undef c_isascii
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144 #define c_isascii(c) \
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145 ({ int __c = (c); \
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4665ee17573f Optimization and comments.
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146 (__c >= 0x00 && __c <= 0x7f); \
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147 })
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148
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149 #if C_CTYPE_CONSECUTIVE_DIGITS \
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150 && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
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151 #if C_CTYPE_ASCII
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152 #undef c_isalnum
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153 #define c_isalnum(c) \
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154 ({ int __c = (c); \
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155 ((__c >= '0' && __c <= '9') \
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156 || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z')); \
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157 })
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158 #else
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159 #undef c_isalnum
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160 #define c_isalnum(c) \
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161 ({ int __c = (c); \
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162 ((__c >= '0' && __c <= '9') \
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163 || (__c >= 'A' && __c <= 'Z') \
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164 || (__c >= 'a' && __c <= 'z')); \
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165 })
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166 #endif
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167 #endif
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168
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169 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
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170 #if C_CTYPE_ASCII
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171 #undef c_isalpha
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172 #define c_isalpha(c) \
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173 ({ int __c = (c); \
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174 ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'Z'); \
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175 })
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176 #else
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177 #undef c_isalpha
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178 #define c_isalpha(c) \
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179 ({ int __c = (c); \
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180 ((__c >= 'A' && __c <= 'Z') || (__c >= 'a' && __c <= 'z')); \
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181 })
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182 #endif
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183 #endif
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184
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185 #undef c_isblank
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186 #define c_isblank(c) \
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187 ({ int __c = (c); \
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188 (__c == ' ' || __c == '\t'); \
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189 })
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190
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191 #if C_CTYPE_ASCII
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192 #undef c_iscntrl
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193 #define c_iscntrl(c) \
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194 ({ int __c = (c); \
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195 ((__c & ~0x1f) == 0 || __c == 0x7f); \
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196 })
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197 #endif
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198
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199 #if C_CTYPE_CONSECUTIVE_DIGITS
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200 #undef c_isdigit
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201 #define c_isdigit(c) \
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202 ({ int __c = (c); \
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203 (__c >= '0' && __c <= '9'); \
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204 })
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205 #endif
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206
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207 #if C_CTYPE_CONSECUTIVE_LOWERCASE
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208 #undef c_islower
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209 #define c_islower(c) \
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210 ({ int __c = (c); \
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211 (__c >= 'a' && __c <= 'z'); \
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212 })
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213 #endif
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214
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215 #if C_CTYPE_ASCII
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216 #undef c_isgraph
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217 #define c_isgraph(c) \
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218 ({ int __c = (c); \
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219 (__c >= '!' && __c <= '~'); \
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220 })
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221 #endif
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222
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223 #if C_CTYPE_ASCII
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224 #undef c_isprint
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225 #define c_isprint(c) \
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226 ({ int __c = (c); \
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227 (__c >= ' ' && __c <= '~'); \
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228 })
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229 #endif
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230
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231 #if C_CTYPE_ASCII
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232 #undef c_ispunct
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233 #define c_ispunct(c) \
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234 ({ int _c = (c); \
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235 (c_isgraph (_c) && ! c_isalnum (_c)); \
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236 })
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237 #endif
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238
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239 #undef c_isspace
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240 #define c_isspace(c) \
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241 ({ int __c = (c); \
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242 (__c == ' ' || __c == '\t' \
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243 || __c == '\n' || __c == '\v' || __c == '\f' || __c == '\r'); \
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244 })
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245
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246 #if C_CTYPE_CONSECUTIVE_UPPERCASE
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247 #undef c_isupper
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248 #define c_isupper(c) \
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249 ({ int __c = (c); \
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250 (__c >= 'A' && __c <= 'Z'); \
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251 })
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252 #endif
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253
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254 #if C_CTYPE_CONSECUTIVE_DIGITS \
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255 && C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
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256 #if C_CTYPE_ASCII
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257 #undef c_isxdigit
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258 #define c_isxdigit(c) \
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259 ({ int __c = (c); \
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260 ((__c >= '0' && __c <= '9') \
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261 || ((__c & ~0x20) >= 'A' && (__c & ~0x20) <= 'F')); \
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262 })
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263 #else
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264 #undef c_isxdigit
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265 #define c_isxdigit(c) \
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266 ({ int __c = (c); \
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267 ((__c >= '0' && __c <= '9') \
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268 || (__c >= 'A' && __c <= 'F') \
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269 || (__c >= 'a' && __c <= 'f')); \
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270 })
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271 #endif
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272 #endif
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273
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274 #if C_CTYPE_CONSECUTIVE_UPPERCASE && C_CTYPE_CONSECUTIVE_LOWERCASE
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275 #undef c_tolower
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276 #define c_tolower(c) \
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277 ({ int __c = (c); \
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278 (__c >= 'A' && __c <= 'Z' ? __c - 'A' + 'a' : __c); \
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279 })
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280 #undef c_toupper
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281 #define c_toupper(c) \
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282 ({ int __c = (c); \
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283 (__c >= 'a' && __c <= 'z' ? __c - 'a' + 'A' : __c); \
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284 })
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285 #endif
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286
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287 #endif /* optimizing for speed */
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288
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289
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290 #ifdef __cplusplus
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291 }
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292 #endif
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293
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294 #endif /* C_CTYPE_H */