File: hex.c

package info (click to toggle)
gdb 8.2.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 223,696 kB
  • sloc: ansic: 1,936,156; asm: 341,757; exp: 146,606; makefile: 56,749; sh: 23,776; cpp: 20,830; yacc: 12,914; perl: 5,331; ada: 4,977; python: 4,617; xml: 4,176; pascal: 3,134; lisp: 1,527; cs: 879; lex: 620; f90: 479; sed: 228; awk: 140; objc: 134; fortran: 43
file content (192 lines) | stat: -rw-r--r-- 6,936 bytes parent folder | download | duplicates (11)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
/* Hex character manipulation support.
   Copyright (C) 1995-2018 Free Software Foundation, Inc.

This file is part of the libiberty library.
Libiberty is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 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 of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB.  If
not, 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 to
corresponding hex values.  This function must be called before any
call to @code{hex_p} or @code{hex_value}.  If you fail to call it, a
default 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 interpreted
as a hexadecimal digit.  The result is undefined if you pass an
invalid 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 than
signed @code{int}, to make it easier to use in parsing addresses from
hex dump files: a signed @code{int} would be sign-extended when
converted to a wider unsigned type --- like @code{bfd_vma}, on some
systems.

@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 */

void
hex_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
}