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safe-ctype.c
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safe-ctype.c
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/* <ctype.h> replacement macros.
Copyright (C) 2000, 2001, 2002, 2003, 2004,
2005 Free Software Foundation, Inc.
Contributed by Zack Weinberg <zackw@stanford.edu>.
This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
Libiberty 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
/*
@defvr Extension HOST_CHARSET
This macro indicates the basic character set and encoding used by the
host: more precisely, the encoding used for character constants in
preprocessor @samp{#if} statements (the C "execution character set").
It is defined by @file{safe-ctype.h}, and will be an integer constant
with one of the following values:
@ftable @code
@item HOST_CHARSET_UNKNOWN
The host character set is unknown - that is, not one of the next two
possibilities.
@item HOST_CHARSET_ASCII
The host character set is ASCII.
@item HOST_CHARSET_EBCDIC
The host character set is some variant of EBCDIC. (Only one of the
nineteen EBCDIC varying characters is tested; exercise caution.)
@end ftable
@end defvr
@deffn Extension ISALPHA (@var{c})
@deffnx Extension ISALNUM (@var{c})
@deffnx Extension ISBLANK (@var{c})
@deffnx Extension ISCNTRL (@var{c})
@deffnx Extension ISDIGIT (@var{c})
@deffnx Extension ISGRAPH (@var{c})
@deffnx Extension ISLOWER (@var{c})
@deffnx Extension ISPRINT (@var{c})
@deffnx Extension ISPUNCT (@var{c})
@deffnx Extension ISSPACE (@var{c})
@deffnx Extension ISUPPER (@var{c})
@deffnx Extension ISXDIGIT (@var{c})
These twelve macros are defined by @file{safe-ctype.h}. Each has the
same meaning as the corresponding macro (with name in lowercase)
defined by the standard header @file{ctype.h}. For example,
@code{ISALPHA} returns true for alphabetic characters and false for
others. However, there are two differences between these macros and
those provided by @file{ctype.h}:
@itemize @bullet
@item These macros are guaranteed to have well-defined behavior for all
values representable by @code{signed char} and @code{unsigned char}, and
for @code{EOF}.
@item These macros ignore the current locale; they are true for these
fixed sets of characters:
@multitable {@code{XDIGIT}} {yada yada yada yada yada yada yada yada}
@item @code{ALPHA} @tab @kbd{A-Za-z}
@item @code{ALNUM} @tab @kbd{A-Za-z0-9}
@item @code{BLANK} @tab @kbd{space tab}
@item @code{CNTRL} @tab @code{!PRINT}
@item @code{DIGIT} @tab @kbd{0-9}
@item @code{GRAPH} @tab @code{ALNUM || PUNCT}
@item @code{LOWER} @tab @kbd{a-z}
@item @code{PRINT} @tab @code{GRAPH ||} @kbd{space}
@item @code{PUNCT} @tab @kbd{`~!@@#$%^&*()_-=+[@{]@}\|;:'",<.>/?}
@item @code{SPACE} @tab @kbd{space tab \n \r \f \v}
@item @code{UPPER} @tab @kbd{A-Z}
@item @code{XDIGIT} @tab @kbd{0-9A-Fa-f}
@end multitable
Note that, if the host character set is ASCII or a superset thereof,
all these macros will return false for all values of @code{char} outside
the range of 7-bit ASCII. In particular, both ISPRINT and ISCNTRL return
false for characters with numeric values from 128 to 255.
@end itemize
@end deffn
@deffn Extension ISIDNUM (@var{c})
@deffnx Extension ISIDST (@var{c})
@deffnx Extension IS_VSPACE (@var{c})
@deffnx Extension IS_NVSPACE (@var{c})
@deffnx Extension IS_SPACE_OR_NUL (@var{c})
@deffnx Extension IS_ISOBASIC (@var{c})
These six macros are defined by @file{safe-ctype.h} and provide
additional character classes which are useful when doing lexical
analysis of C or similar languages. They are true for the following
sets of characters:
@multitable {@code{SPACE_OR_NUL}} {yada yada yada yada yada yada yada yada}
@item @code{IDNUM} @tab @kbd{A-Za-z0-9_}
@item @code{IDST} @tab @kbd{A-Za-z_}
@item @code{VSPACE} @tab @kbd{\r \n}
@item @code{NVSPACE} @tab @kbd{space tab \f \v \0}
@item @code{SPACE_OR_NUL} @tab @code{VSPACE || NVSPACE}
@item @code{ISOBASIC} @tab @code{VSPACE || NVSPACE || PRINT}
@end multitable
@end deffn
*/
#include "ansidecl.h"
#include <safe-ctype.h>
#include <stdio.h> /* for EOF */
#if EOF != -1
#error "<safe-ctype.h> requires EOF == -1"
#endif
/* Shorthand */
#define bl _sch_isblank
#define cn _sch_iscntrl
#define di _sch_isdigit
#define is _sch_isidst
#define lo _sch_islower
#define nv _sch_isnvsp
#define pn _sch_ispunct
#define pr _sch_isprint
#define sp _sch_isspace
#define up _sch_isupper
#define vs _sch_isvsp
#define xd _sch_isxdigit
/* Masks. */
#define L (const unsigned short) (lo|is |pr) /* lower case letter */
#define XL (const unsigned short) (lo|is|xd|pr) /* lowercase hex digit */
#define U (const unsigned short) (up|is |pr) /* upper case letter */
#define XU (const unsigned short) (up|is|xd|pr) /* uppercase hex digit */
#define D (const unsigned short) (di |xd|pr) /* decimal digit */
#define P (const unsigned short) (pn |pr) /* punctuation */
#define _ (const unsigned short) (pn|is |pr) /* underscore */
#define C (const unsigned short) ( cn) /* control character */
#define Z (const unsigned short) (nv |cn) /* NUL */
#define M (const unsigned short) (nv|sp |cn) /* cursor movement: \f \v */
#define V (const unsigned short) (vs|sp |cn) /* vertical space: \r \n */
#define T (const unsigned short) (nv|sp|bl|cn) /* tab */
#define S (const unsigned short) (nv|sp|bl|pr) /* space */
/* Are we ASCII? */
#if HOST_CHARSET == HOST_CHARSET_ASCII
const unsigned short _sch_istable[256] =
{
Z, C, C, C, C, C, C, C, /* NUL SOH STX ETX EOT ENQ ACK BEL */
C, T, V, M, M, V, C, C, /* BS HT LF VT FF CR SO SI */
C, C, C, C, C, C, C, C, /* DLE DC1 DC2 DC3 DC4 NAK SYN ETB */
C, C, C, C, C, C, C, C, /* CAN EM SUB ESC FS GS RS US */
S, P, P, P, P, P, P, P, /* SP ! " # $ % & ' */
P, P, P, P, P, P, P, P, /* ( ) * + , - . / */
D, D, D, D, D, D, D, D, /* 0 1 2 3 4 5 6 7 */
D, D, P, P, P, P, P, P, /* 8 9 : ; < = > ? */
P, XU, XU, XU, XU, XU, XU, U, /* @ A B C D E F G */
U, U, U, U, U, U, U, U, /* H I J K L M N O */
U, U, U, U, U, U, U, U, /* P Q R S T U V W */
U, U, U, P, P, P, P, _, /* X Y Z [ \ ] ^ _ */
P, XL, XL, XL, XL, XL, XL, L, /* ` a b c d e f g */
L, L, L, L, L, L, L, L, /* h i j k l m n o */
L, L, L, L, L, L, L, L, /* p q r s t u v w */
L, L, L, P, P, P, P, C, /* x y z { | } ~ DEL */
/* high half of unsigned char is locale-specific, so all tests are
false in "C" locale */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
const unsigned char _sch_tolower[256] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64,
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
91, 92, 93, 94, 95, 96,
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
123,124,125,126,127,
128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
};
const unsigned char _sch_toupper[256] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
64,
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
91, 92, 93, 94, 95, 96,
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
123,124,125,126,127,
128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143,
144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159,
160,161,162,163, 164,165,166,167, 168,169,170,171, 172,173,174,175,
176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,190,191,
192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207,
208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223,
224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239,
240,241,242,243, 244,245,246,247, 248,249,250,251, 252,253,254,255,
};
#else
# if HOST_CHARSET == HOST_CHARSET_EBCDIC
#error "FIXME: write tables for EBCDIC"
# else
#error "Unrecognized host character set"
# endif
#endif