133965Sjdp/* Hex character manipulation support. 289857Sobrien Copyright (C) 1995, 2001 Free Software Foundation, Inc. 333965Sjdp 433965SjdpThis file is part of the libiberty library. 533965SjdpLibiberty is free software; you can redistribute it and/or 633965Sjdpmodify it under the terms of the GNU Library General Public 733965SjdpLicense as published by the Free Software Foundation; either 833965Sjdpversion 2 of the License, or (at your option) any later version. 933965Sjdp 1033965SjdpLibiberty is distributed in the hope that it will be useful, 1133965Sjdpbut WITHOUT ANY WARRANTY; without even the implied warranty of 1233965SjdpMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1333965SjdpLibrary General Public License for more details. 1433965Sjdp 1533965SjdpYou should have received a copy of the GNU Library General Public 1633965SjdpLicense along with libiberty; see the file COPYING.LIB. If 17218822Sdimnot, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 18218822SdimBoston, MA 02110-1301, USA. */ 1933965Sjdp 2089857Sobrien#include <stdio.h> /* for EOF */ 21218822Sdim#ifdef HAVE_CONFIG_H 22218822Sdim#include "config.h" 23218822Sdim#endif 2433965Sjdp#include "libiberty.h" 25130561Sobrien#include "safe-ctype.h" /* for HOST_CHARSET_ASCII */ 2633965Sjdp 27130561Sobrien#if EOF != -1 28130561Sobrien #error "hex.c requires EOF == -1" 29130561Sobrien#endif 30130561Sobrien 31104834Sobrien/* 3233965Sjdp 33104834Sobrien@deftypefn Extension void hex_init (void) 34104834Sobrien 35104834SobrienInitializes the array mapping the current character set to 36104834Sobriencorresponding hex values. This function must be called before any 37104834Sobriencall to @code{hex_p} or @code{hex_value}. If you fail to call it, a 38104834Sobriendefault ASCII-based table will normally be used on ASCII systems. 39104834Sobrien 40104834Sobrien@end deftypefn 41104834Sobrien 42104834Sobrien@deftypefn Extension int hex_p (int @var{c}) 43104834Sobrien 44104834SobrienEvaluates to non-zero if the given character is a valid hex character, 45104834Sobrienor zero if it is not. Note that the value you pass will be cast to 46104834Sobrien@code{unsigned char} within the macro. 47104834Sobrien 48104834Sobrien@end deftypefn 49104834Sobrien 50218822Sdim@deftypefn Extension {unsigned int} hex_value (int @var{c}) 51104834Sobrien 52104834SobrienReturns the numeric equivalent of the given character when interpreted 53218822Sdimas a hexadecimal digit. The result is undefined if you pass an 54104834Sobrieninvalid hex digit. Note that the value you pass will be cast to 55104834Sobrien@code{unsigned char} within the macro. 56104834Sobrien 57130561SobrienThe @code{hex_value} macro returns @code{unsigned int}, rather than 58130561Sobriensigned @code{int}, to make it easier to use in parsing addresses from 59130561Sobrienhex dump files: a signed @code{int} would be sign-extended when 60130561Sobrienconverted to a wider unsigned type --- like @code{bfd_vma}, on some 61130561Sobriensystems. 62130561Sobrien 63104834Sobrien@end deftypefn 64104834Sobrien 65104834Sobrien@undocumented _hex_array_size 66104834Sobrien@undocumented _hex_bad 67104834Sobrien@undocumented _hex_value 68104834Sobrien 69104834Sobrien*/ 70104834Sobrien 71104834Sobrien 7289857Sobrien/* Are we ASCII? */ 73130561Sobrien#if HOST_CHARSET == HOST_CHARSET_ASCII 7489857Sobrien 75130561Sobrienconst unsigned char _hex_value[_hex_array_size] = 7633965Sjdp{ 7789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* NUL SOH STX ETX */ 7889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* EOT ENQ ACK BEL */ 7989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* BS HT LF VT */ 8089857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FF CR SO SI */ 8189857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DLE DC1 DC2 DC3 */ 8289857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DC4 NAK SYN ETB */ 8389857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* CAN EM SUB ESC */ 8489857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FS GS RS US */ 8589857Sobrien 8689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* SP ! " # */ 8789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* $ % & ' */ 8889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* ( ) * + */ 8989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* , - . / */ 9089857Sobrien 0, 1, 2, 3, /* 0 1 2 3 */ 9189857Sobrien 4, 5, 6, 7, /* 4 5 6 7 */ 9289857Sobrien 8, 9, _hex_bad, _hex_bad, /* 8 9 : ; */ 9389857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* < = > ? */ 9489857Sobrien 9589857Sobrien _hex_bad, 10, 11, 12, /* @ A B C */ 9689857Sobrien 13, 14, 15, _hex_bad, /* D E F G */ 9789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* H I J K */ 9889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* L M N O */ 9989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* P Q R S */ 10089857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* T U V W */ 10189857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* X Y Z [ */ 10289857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* \ ] ^ _ */ 10389857Sobrien 10489857Sobrien _hex_bad, 10, 11, 12, /* ` a b c */ 10589857Sobrien 13, 14, 15, _hex_bad, /* d e f g */ 10689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* h i j k */ 10789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* l m n o */ 10889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* p q r s */ 10989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* t u v w */ 11089857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* x y z { */ 11189857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* | } ~ DEL */ 11289857Sobrien 11389857Sobrien /* The high half of unsigned char, all values are _hex_bad. */ 11489857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 11589857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 11689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 11789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 11889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 11989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12089857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12189857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12289857Sobrien 12389857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12489857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12589857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 12989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13089857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13189857Sobrien 13289857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13389857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13489857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13589857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 13989857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14089857Sobrien 14189857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14289857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14389857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14489857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14589857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14689857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14789857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14889857Sobrien _hex_bad, _hex_bad, _hex_bad, _hex_bad, 14989857Sobrien}; 150104834Sobrien#define HEX_TABLE_INITIALIZED 151104834Sobrien 15289857Sobrien#else 153104834Sobrien 154130561Sobrienunsigned char _hex_value[_hex_array_size]; 155104834Sobrien 15689857Sobrien#endif /* not ASCII */ 157104834Sobrien 158104834Sobrienvoid 159218822Sdimhex_init (void) 160104834Sobrien{ 161104834Sobrien#ifndef HEX_TABLE_INITIALIZED 162104834Sobrien int i; 163104834Sobrien 164104834Sobrien for (i=0; i<_hex_array_size; i++) 165104834Sobrien { 166104834Sobrien switch (i) 167104834Sobrien { 168104834Sobrien case '0': _hex_value[i] = 0; break; 169104834Sobrien case '1': _hex_value[i] = 1; break; 170104834Sobrien case '2': _hex_value[i] = 2; break; 171104834Sobrien case '3': _hex_value[i] = 3; break; 172104834Sobrien case '4': _hex_value[i] = 4; break; 173104834Sobrien case '5': _hex_value[i] = 5; break; 174104834Sobrien case '6': _hex_value[i] = 6; break; 175104834Sobrien case '7': _hex_value[i] = 7; break; 176104834Sobrien case '8': _hex_value[i] = 8; break; 177104834Sobrien case '9': _hex_value[i] = 9; break; 178104834Sobrien 179104834Sobrien case 'a': case 'A': _hex_value[i] = 10; break; 180104834Sobrien case 'b': case 'B': _hex_value[i] = 11; break; 181104834Sobrien case 'c': case 'C': _hex_value[i] = 12; break; 182104834Sobrien case 'd': case 'D': _hex_value[i] = 13; break; 183104834Sobrien case 'e': case 'E': _hex_value[i] = 14; break; 184104834Sobrien case 'f': case 'F': _hex_value[i] = 15; break; 185104834Sobrien 186104834Sobrien default: 187104834Sobrien _hex_value[i] = _hex_bad; 188104834Sobrien break; 189104834Sobrien } 190104834Sobrien } 191104834Sobrien#endif 192104834Sobrien} 193