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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [libiberty/] [hex.c] - Blame information for rev 277

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1 38 julius 
/* 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 hexidecimal 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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