lib/libiberty/hex.c

   1 /*
   2  * Copyright (c) 2004 Joerg Sonnenberger <joerg@bec.de>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  * $DragonFly: src/lib/libiberty/hex.c,v 1.1 2004/10/23 14:15:21 joerg Exp $
  26  */
  27
  28 #include <libiberty.h>
  29
  30 static const char hex_table[128] = {
  31    0,    0,    0,    0,    0,    0,    0,    0,
  32    0,    0,    0,    0,    0,    0,    0,    0,
  33    0,    0,    0,    0,    0,    0,    0,    0,
  34    0,    0,    0,    0,    0,    0,    0,    0,
  35    0,    0,    0,    0,    0,    0,    0,    0,
  36    0,    0,    0,    0,    0,    0,    0,    0,
  37    1,    2,    3,    4,    5,    6,    7,    8,
  38    9,   10,    0,    0,    0,    0,    0,    0,
  39    0,   11,   12,   13,   14,   15,   16,    0,
  40    0,    0,    0,    0,    0,    0,    0,    0,
  41    0,    0,    0,    0,    0,    0,    0,    0,
  42    0,    0,    0,    0,    0,    0,    0,    0,
  43    0,   11,   12,   13,   14,   15,   16,    0,
  44    0,    0,    0,    0,    0,    0,    0,    0,
  45    0,    0,    0,    0,    0,    0,    0,    0,
  46    0,    0,    0,    0,    0,    0,    0,    0
  47 };
  48 #define HEX_TABLE_INITIALZED
  49
  50 #ifndef HEX_TABLE_INITIALZED
  51 static char     hex_table[128];
  52 #endif
  53
  54 void
  55 hex_init(void)
  56 {
  57 #ifndef HEX_TABLE_INITIALZED
  58         hex_table['0'] = 1;
  59         hex_table['1'] = 2;
  60         hex_table['2'] = 3;
  61         hex_table['3'] = 4;
  62         hex_table['4'] = 5;
  63         hex_table['5'] = 6;
  64         hex_table['6'] = 7;
  65         hex_table['7'] = 8;
  66         hex_table['8'] = 9;
  67         hex_table['9'] = 10;
  68         hex_table['a'] = 11;
  69         hex_table['b'] = 12;
  70         hex_table['c'] = 13;
  71         hex_table['d'] = 14;
  72         hex_table['e'] = 15;
  73         hex_table['f'] = 16;
  74         hex_table['a'] = 11;
  75         hex_table['b'] = 12;
  76         hex_table['c'] = 13;
  77         hex_table['d'] = 14;
  78         hex_table['e'] = 15;
  79         hex_table['f'] = 16;
  80         hex_table['A'] = 11;
  81         hex_table['B'] = 12;
  82         hex_table['C'] = 13;
  83         hex_table['D'] = 14;
  84         hex_table['E'] = 15;
  85         hex_table['F'] = 16;
  86 #endif
  87 }
  88
  89 int
  90 hex_p(int c)
  91 {
  92         if ((c & ~127) != 0)
  93                 return(0);
  94         return(hex_table[c]);
  95 }
  96
  97 unsigned int
  98 hex_value(int c)
  99 {
 100         if ((c & ~127) != 0)
 101                 return(0);
 102         return(hex_table[c] - 1);
 103 }