mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
181 lines
6.4 KiB
C
181 lines
6.4 KiB
C
/* Hex character manipulation support.
|
|
Copyright (C) 1995, 2001 Free Software Foundation, Inc.
|
|
|
|
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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <stdio.h> /* for EOF */
|
|
#include "libiberty.h"
|
|
|
|
/*
|
|
|
|
@deftypefn Extension void hex_init (void)
|
|
|
|
Initializes the array mapping the current character set to
|
|
corresponding hex values. This function must be called before any
|
|
call to @code{hex_p} or @code{hex_value}. If you fail to call it, a
|
|
default ASCII-based table will normally be used on ASCII systems.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension int hex_p (int @var{c})
|
|
|
|
Evaluates to non-zero if the given character is a valid hex character,
|
|
or zero if it is not. Note that the value you pass will be cast to
|
|
@code{unsigned char} within the macro.
|
|
|
|
@end deftypefn
|
|
|
|
@deftypefn Extension int hex_value (int @var{c})
|
|
|
|
Returns the numeric equivalent of the given character when interpreted
|
|
as a hexidecimal digit. The result is undefined if you pass an
|
|
invalid hex digit. Note that the value you pass will be cast to
|
|
@code{unsigned char} within the macro.
|
|
|
|
@end deftypefn
|
|
|
|
@undocumented _hex_array_size
|
|
@undocumented _hex_bad
|
|
@undocumented _hex_value
|
|
|
|
*/
|
|
|
|
|
|
/* Are we ASCII? */
|
|
#if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \
|
|
&& 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 \
|
|
&& EOF == -1
|
|
|
|
const char _hex_value[_hex_array_size] =
|
|
{
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* NUL SOH STX ETX */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* EOT ENQ ACK BEL */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* BS HT LF VT */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FF CR SO SI */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DLE DC1 DC2 DC3 */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DC4 NAK SYN ETB */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* CAN EM SUB ESC */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FS GS RS US */
|
|
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* SP ! " # */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* $ % & ' */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* ( ) * + */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* , - . / */
|
|
0, 1, 2, 3, /* 0 1 2 3 */
|
|
4, 5, 6, 7, /* 4 5 6 7 */
|
|
8, 9, _hex_bad, _hex_bad, /* 8 9 : ; */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* < = > ? */
|
|
|
|
_hex_bad, 10, 11, 12, /* @ A B C */
|
|
13, 14, 15, _hex_bad, /* D E F G */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* H I J K */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* L M N O */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* P Q R S */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* T U V W */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* X Y Z [ */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* \ ] ^ _ */
|
|
|
|
_hex_bad, 10, 11, 12, /* ` a b c */
|
|
13, 14, 15, _hex_bad, /* d e f g */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* h i j k */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* l m n o */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* p q r s */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* t u v w */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* x y z { */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* | } ~ DEL */
|
|
|
|
/* The high half of unsigned char, all values are _hex_bad. */
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
_hex_bad, _hex_bad, _hex_bad, _hex_bad,
|
|
};
|
|
#define HEX_TABLE_INITIALIZED
|
|
|
|
#else
|
|
|
|
char _hex_value[_hex_array_size];
|
|
|
|
#endif /* not ASCII */
|
|
|
|
void
|
|
hex_init ()
|
|
{
|
|
#ifndef HEX_TABLE_INITIALIZED
|
|
int i;
|
|
|
|
for (i=0; i<_hex_array_size; i++)
|
|
{
|
|
switch (i)
|
|
{
|
|
case '0': _hex_value[i] = 0; break;
|
|
case '1': _hex_value[i] = 1; break;
|
|
case '2': _hex_value[i] = 2; break;
|
|
case '3': _hex_value[i] = 3; break;
|
|
case '4': _hex_value[i] = 4; break;
|
|
case '5': _hex_value[i] = 5; break;
|
|
case '6': _hex_value[i] = 6; break;
|
|
case '7': _hex_value[i] = 7; break;
|
|
case '8': _hex_value[i] = 8; break;
|
|
case '9': _hex_value[i] = 9; break;
|
|
|
|
case 'a': case 'A': _hex_value[i] = 10; break;
|
|
case 'b': case 'B': _hex_value[i] = 11; break;
|
|
case 'c': case 'C': _hex_value[i] = 12; break;
|
|
case 'd': case 'D': _hex_value[i] = 13; break;
|
|
case 'e': case 'E': _hex_value[i] = 14; break;
|
|
case 'f': case 'F': _hex_value[i] = 15; break;
|
|
|
|
default:
|
|
_hex_value[i] = _hex_bad;
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|