/* Hex character manipulation support.   Copyright (C) 1995-2026 Free Software Foundation, Inc. This file is part of the libiberty library.Libiberty is free software; you can redistribute it and/ormodify it under the terms of the GNU Library General PublicLicense as published by the Free Software Foundation; eitherversion 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 ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNULibrary General Public License for more details. You should have received a copy of the GNU Library General PublicLicense along with libiberty; see the file COPYING.LIB.  Ifnot, 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 tocorresponding hex values.  This function must be called before anycall to @code{hex_p} or @code{hex_value}.  If you fail to call it, adefault 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 interpretedas a hexadecimal digit.  The result is undefined if you pass aninvalid 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 thansigned @code{int}, to make it easier to use in parsing addresses fromhex dump files: a signed @code{int} would be sign-extended whenconverted to a wider unsigned type --- like @code{bfd_vma}, on somesystems. @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 */ voidhex_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}