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Merge branch 'master' into merge-job
[deliverable/binutils-gdb.git] / libiberty / hex.c
CommitLineData
252b5132 1/* Hex character manipulation support.
82704155 2 Copyright (C) 1995-2019 Free Software Foundation, Inc.
252b5132
RH		 3
4This file is part of the libiberty library.
5Libiberty is free software; you can redistribute it and/or
6modify it under the terms of the GNU Library General Public
7License as published by the Free Software Foundation; either
8version 2 of the License, or (at your option) any later version.
9
10Libiberty is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13Library General Public License for more details.
14
15You should have received a copy of the GNU Library General Public
16License along with libiberty; see the file COPYING.LIB. If
979c05d3
NC		 17not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
18Boston, MA 02110-1301, USA. */
252b5132 19
d311a83a 20#include <stdio.h> /* for EOF */
fa99459d
DD		 21#ifdef HAVE_CONFIG_H
22#include "config.h"
23#endif
252b5132 24#include "libiberty.h"
70ecf948
DD		 25#include "safe-ctype.h" /* for HOST_CHARSET_ASCII */
26
27#if EOF != -1
28 #error "hex.c requires EOF == -1"
29#endif
252b5132 30
7dd4d42a
DD		 31/*
32
33@deftypefn Extension void hex_init (void)
34
35Initializes the array mapping the current character set to
36corresponding hex values. This function must be called before any
37call to @code{hex_p} or @code{hex_value}. If you fail to call it, a
38default ASCII-based table will normally be used on ASCII systems.
39
40@end deftypefn
41
42@deftypefn Extension int hex_p (int @var{c})
43
44Evaluates to non-zero if the given character is a valid hex character,
45or zero if it is not. Note that the value you pass will be cast to
46@code{unsigned char} within the macro.
47
48@end deftypefn
49
b5c3b3de 50@deftypefn Extension {unsigned int} hex_value (int @var{c})
7dd4d42a
DD		 51
52Returns the numeric equivalent of the given character when interpreted
6dd7f013 53as a hexadecimal digit. The result is undefined if you pass an
7dd4d42a
DD		 54invalid hex digit. Note that the value you pass will be cast to
55@code{unsigned char} within the macro.
56
e4f79046
JB		 57The @code{hex_value} macro returns @code{unsigned int}, rather than
58signed @code{int}, to make it easier to use in parsing addresses from
59hex dump files: a signed @code{int} would be sign-extended when
60converted to a wider unsigned type --- like @code{bfd_vma}, on some
61systems.
62
7dd4d42a
DD		 63@end deftypefn
64
65@undocumented _hex_array_size
66@undocumented _hex_bad
67@undocumented _hex_value
68
69*/
70
d311a83a
DD		 71
72/* Are we ASCII? */
70ecf948 73#if HOST_CHARSET == HOST_CHARSET_ASCII
d311a83a 74
e4f79046 75const unsigned char _hex_value[_hex_array_size] =
d311a83a
DD		 76{
77 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* NUL SOH STX ETX */
78 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* EOT ENQ ACK BEL */
79 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* BS HT LF VT */
80 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FF CR SO SI */
81 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DLE DC1 DC2 DC3 */
82 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* DC4 NAK SYN ETB */
83 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* CAN EM SUB ESC */
84 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* FS GS RS US */
85
86 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* SP ! " # */
87 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* $ % & ' */
88 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* ( ) * + */
89 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* , - . / */
90 0, 1, 2, 3, /* 0 1 2 3 */
91 4, 5, 6, 7, /* 4 5 6 7 */
92 8, 9, _hex_bad, _hex_bad, /* 8 9 : ; */
93 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* < = > ? */
94
95 _hex_bad, 10, 11, 12, /* @ A B C */
96 13, 14, 15, _hex_bad, /* D E F G */
97 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* H I J K */
98 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* L M N O */
99 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* P Q R S */
100 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* T U V W */
101 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* X Y Z [ */
102 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* \ ] ^ _ */
103
104 _hex_bad, 10, 11, 12, /* ` a b c */
105 13, 14, 15, _hex_bad, /* d e f g */
106 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* h i j k */
107 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* l m n o */
108 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* p q r s */
109 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* t u v w */
110 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* x y z { */
111 _hex_bad, _hex_bad, _hex_bad, _hex_bad, /* | } ~ DEL */
112
113 /* The high half of unsigned char, all values are _hex_bad. */
114 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
115 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
116 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
117 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
118 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
119 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
120 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
121 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
122
123 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
124 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
125 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
126 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
127 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
128 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
129 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
130 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
131
132 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
133 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
134 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
135 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
136 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
137 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
138 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
139 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
140
141 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
142 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
143 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
144 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
145 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
146 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
147 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
148 _hex_bad, _hex_bad, _hex_bad, _hex_bad,
149};
7dd4d42a
DD		 150#define HEX_TABLE_INITIALIZED
151
d311a83a 152#else
7dd4d42a 153
e4f79046 154unsigned char _hex_value[_hex_array_size];
7dd4d42a 155
d311a83a 156#endif /* not ASCII */
7dd4d42a
DD		 157
158void
49b1fae4 159hex_init (void)
7dd4d42a
DD		 160{
161#ifndef HEX_TABLE_INITIALIZED
162 int i;
163
164 for (i=0; i<_hex_array_size; i++)
165 {
166 switch (i)
167 {
168 case '0': _hex_value[i] = 0; break;
169 case '1': _hex_value[i] = 1; break;
170 case '2': _hex_value[i] = 2; break;
171 case '3': _hex_value[i] = 3; break;
172 case '4': _hex_value[i] = 4; break;
173 case '5': _hex_value[i] = 5; break;
174 case '6': _hex_value[i] = 6; break;
175 case '7': _hex_value[i] = 7; break;
176 case '8': _hex_value[i] = 8; break;
177 case '9': _hex_value[i] = 9; break;
178
179 case 'a': case 'A': _hex_value[i] = 10; break;
180 case 'b': case 'B': _hex_value[i] = 11; break;
181 case 'c': case 'C': _hex_value[i] = 12; break;
182 case 'd': case 'D': _hex_value[i] = 13; break;
183 case 'e': case 'E': _hex_value[i] = 14; break;
184 case 'f': case 'F': _hex_value[i] = 15; break;
185
186 default:
187 _hex_value[i] = _hex_bad;
188 break;
189 }
190 }
191#endif
192}
GDB Binutils - Deliverables
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