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v 1.8.8

    1: /*
    2:  * Copyright (c) 2013 Todd C. Miller <Todd.Miller@courtesan.com>
    3:  *
    4:  * Permission to use, copy, modify, and distribute this software for any
    5:  * purpose with or without fee is hereby granted, provided that the above
    6:  * copyright notice and this permission notice appear in all copies.
    7:  *
    8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   15:  */
   16: 
   17: #include <config.h>
   18: 
   19: #include <sys/types.h>
   20: #include <stdio.h>
   21: 
   22: #include "missing.h"
   23: #include "sudo_debug.h"
   24: #include "fatal.h"
   25: 
   26: int
   27: hexchar(const char *s)
   28: {
   29:     unsigned char result[2];
   30:     int i;
   31:     debug_decl(hexchar, SUDO_DEBUG_UTIL)
   32: 
   33:     for (i = 0; i < 2; i++) {
   34: 	switch (s[i]) {
   35: 	case '0':
   36: 	    result[i] = 0;
   37: 	    break;
   38: 	case '1':
   39: 	    result[i] = 1;
   40: 	    break;
   41: 	case '2':
   42: 	    result[i] = 2;
   43: 	    break;
   44: 	case '3':
   45: 	    result[i] = 3;
   46: 	    break;
   47: 	case '4':
   48: 	    result[i] = 4;
   49: 	    break;
   50: 	case '5':
   51: 	    result[i] = 5;
   52: 	    break;
   53: 	case '6':
   54: 	    result[i] = 6;
   55: 	    break;
   56: 	case '7':
   57: 	    result[i] = 7;
   58: 	    break;
   59: 	case '8':
   60: 	    result[i] = 8;
   61: 	    break;
   62: 	case '9':
   63: 	    result[i] = 9;
   64: 	    break;
   65: 	case 'A':
   66: 	case 'a':
   67: 	    result[i] = 10;
   68: 	    break;
   69: 	case 'B':
   70: 	case 'b':
   71: 	    result[i] = 11;
   72: 	    break;
   73: 	case 'C':
   74: 	case 'c':
   75: 	    result[i] = 12;
   76: 	    break;
   77: 	case 'D':
   78: 	case 'd':
   79: 	    result[i] = 13;
   80: 	    break;
   81: 	case 'E':
   82: 	case 'e':
   83: 	    result[i] = 14;
   84: 	    break;
   85: 	case 'F':
   86: 	case 'f':
   87: 	    result[i] = 15;
   88: 	    break;
   89: 	default:
   90: 	    /* Should not happen. */
   91: 	    fatalx("internal error, \\x%s not in proper hex format", s);
   92: 	}
   93:     }
   94:     debug_return_int((result[0] << 4) | result[1]);
   95: }