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192 lines
6.8 KiB
192 lines
6.8 KiB
/* Hex character manipulation support. |
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Copyright (C) 1995, 2001 Free Software Foundation, Inc. |
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This file is part of the libiberty library. |
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Libiberty is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Library General Public |
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License as published by the Free Software Foundation; either |
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version 2 of the License, or (at your option) any later version. |
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Libiberty 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 GNU |
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Library General Public License for more details. |
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You should have received a copy of the GNU Library General Public |
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License along with libiberty; see the file COPYING.LIB. If |
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not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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Boston, MA 02110-1301, USA. */ |
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#include <stdio.h> /* for EOF */ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "libiberty.h" |
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#include "safe-ctype.h" /* for HOST_CHARSET_ASCII */ |
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#if EOF != -1 |
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#error "hex.c requires EOF == -1" |
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#endif |
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/* |
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@deftypefn Extension void hex_init (void) |
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Initializes the array mapping the current character set to |
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corresponding hex values. This function must be called before any |
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call to @code{hex_p} or @code{hex_value}. If you fail to call it, a |
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default ASCII-based table will normally be used on ASCII systems. |
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@end deftypefn |
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@deftypefn Extension int hex_p (int @var{c}) |
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Evaluates to non-zero if the given character is a valid hex character, |
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or zero if it is not. Note that the value you pass will be cast to |
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@code{unsigned char} within the macro. |
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@end deftypefn |
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@deftypefn Extension {unsigned int} hex_value (int @var{c}) |
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Returns the numeric equivalent of the given character when interpreted |
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as a hexadecimal digit. The result is undefined if you pass an |
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invalid hex digit. Note that the value you pass will be cast to |
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@code{unsigned char} within the macro. |
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The @code{hex_value} macro returns @code{unsigned int}, rather than |
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signed @code{int}, to make it easier to use in parsing addresses from |
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hex dump files: a signed @code{int} would be sign-extended when |
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converted to a wider unsigned type --- like @code{bfd_vma}, on some |
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systems. |
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@end deftypefn |
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@undocumented _hex_array_size |
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@undocumented _hex_bad |
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@undocumented _hex_value |
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*/ |
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/* Are we ASCII? */ |
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#if HOST_CHARSET == HOST_CHARSET_ASCII |
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const unsigned char _hex_value[_hex_array_size] = |
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{ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* NUL SOH STX ETX */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* EOT ENQ ACK BEL */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* BS HT LF VT */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FF CR SO SI */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DLE DC1 DC2 DC3 */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DC4 NAK SYN ETB */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* CAN EM SUB ESC */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FS GS RS US */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* SP ! " # */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* $ % & ' */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* ( ) * + */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* , - . / */ |
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0, 1, 2, 3, /* 0 1 2 3 */ |
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4, 5, 6, 7, /* 4 5 6 7 */ |
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8, 9, _hex_bad, _hex_bad, /* 8 9 : ; */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* < = > ? */ |
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_hex_bad, 10, 11, 12, /* @ A B C */ |
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13, 14, 15, _hex_bad, /* D E F G */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* H I J K */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* L M N O */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* P Q R S */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* T U V W */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* X Y Z [ */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* \ ] ^ _ */ |
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_hex_bad, 10, 11, 12, /* ` a b c */ |
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13, 14, 15, _hex_bad, /* d e f g */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* h i j k */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* l m n o */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* p q r s */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* t u v w */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* x y z { */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* | } ~ DEL */ |
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/* The high half of unsigned char, all values are _hex_bad. */ |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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_hex_bad, _hex_bad, _hex_bad, _hex_bad, |
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}; |
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#define HEX_TABLE_INITIALIZED |
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#else |
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unsigned char _hex_value[_hex_array_size]; |
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#endif /* not ASCII */ |
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void |
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hex_init (void) |
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{ |
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#ifndef HEX_TABLE_INITIALIZED |
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int i; |
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for (i=0; i<_hex_array_size; i++) |
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{ |
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switch (i) |
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{ |
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case '0': _hex_value[i] = 0; break; |
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case '1': _hex_value[i] = 1; break; |
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case '2': _hex_value[i] = 2; break; |
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case '3': _hex_value[i] = 3; break; |
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case '4': _hex_value[i] = 4; break; |
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case '5': _hex_value[i] = 5; break; |
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case '6': _hex_value[i] = 6; break; |
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case '7': _hex_value[i] = 7; break; |
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case '8': _hex_value[i] = 8; break; |
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case '9': _hex_value[i] = 9; break; |
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case 'a': case 'A': _hex_value[i] = 10; break; |
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case 'b': case 'B': _hex_value[i] = 11; break; |
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case 'c': case 'C': _hex_value[i] = 12; break; |
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case 'd': case 'D': _hex_value[i] = 13; break; |
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case 'e': case 'E': _hex_value[i] = 14; break; |
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case 'f': case 'F': _hex_value[i] = 15; break; |
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default: |
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_hex_value[i] = _hex_bad; |
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break; |
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} |
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} |
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#endif |
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}
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