| /* Hex character manipulation support. |
| Copyright (C) 1995-2022 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., 51 Franklin Street - Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include <stdio.h> /* for EOF */ |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include "libiberty.h" |
| #include "safe-ctype.h" /* for HOST_CHARSET_ASCII */ |
| |
| #if EOF != -1 |
| #error "hex.c requires EOF == -1" |
| #endif |
| |
| /* |
| |
| @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 {unsigned int} hex_value (int @var{c}) |
| |
| Returns the numeric equivalent of the given character when interpreted |
| as a hexadecimal 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. |
| |
| The @code{hex_value} macro returns @code{unsigned int}, rather than |
| signed @code{int}, to make it easier to use in parsing addresses from |
| hex dump files: a signed @code{int} would be sign-extended when |
| converted to a wider unsigned type --- like @code{bfd_vma}, on some |
| systems. |
| |
| @end deftypefn |
| |
| @undocumented _hex_array_size |
| @undocumented _hex_bad |
| @undocumented _hex_value |
| |
| */ |
| |
| |
| /* Are we ASCII? */ |
| #if HOST_CHARSET == HOST_CHARSET_ASCII |
| |
| const unsigned 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 |
| |
| unsigned char _hex_value[_hex_array_size]; |
| |
| #endif /* not ASCII */ |
| |
| void |
| hex_init (void) |
| { |
| #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 |
| } |