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1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
41 | \f | |
42 | ||
43 | #include "extchrs.h" | |
44 | ||
45 | \f | |
46 | ||
e2806c10 | 47 | #ifdef SCM_FAKE_EXT_CHARS |
0f2d19dd | 48 | |
1cc91f1b | 49 | |
0f2d19dd JB |
50 | int |
51 | xmblen (str, size) | |
52 | const char * str; | |
53 | size_t size; | |
0f2d19dd JB |
54 | { |
55 | if (!str) | |
56 | return 0; | |
57 | ||
58 | if (*(unsigned char *)str > 127) | |
59 | return ((size < 4) | |
60 | ? -1 | |
61 | : 4); | |
62 | else if (!*str) | |
63 | return 0; | |
64 | else | |
65 | return 1; | |
66 | } | |
67 | ||
1cc91f1b | 68 | |
0f2d19dd JB |
69 | int |
70 | xwctomb (_str, c) | |
71 | char * _str; | |
72 | int c; | |
0f2d19dd JB |
73 | { |
74 | unsigned char * str; | |
75 | str = (unsigned char *)_str; | |
76 | if (!str) | |
77 | return 0; | |
78 | ||
79 | if (!c) | |
80 | { | |
81 | *str = 0; | |
82 | return 0; | |
83 | } | |
84 | ||
85 | ||
86 | if (c < 127) | |
87 | { | |
88 | *str = c; | |
89 | return 1; | |
90 | } | |
91 | ||
92 | str[0] = 255; | |
93 | str[1] = 0x80 | ((c >> 10) & 0x3f); | |
94 | str[2] = 0x80 | ((c >> 4) & 0x3f); | |
95 | str[3] = 0x80 | (c & 0xf); | |
96 | return 4; | |
97 | } | |
98 | ||
1cc91f1b | 99 | |
0f2d19dd | 100 | int |
1cc91f1b | 101 | xmbtowc (result, _str, size) |
0f2d19dd JB |
102 | xwchar_t * result; |
103 | const unsigned char * _str; | |
104 | size_t size; | |
0f2d19dd JB |
105 | { |
106 | const unsigned char * str; | |
107 | str = (const unsigned char *)_str; | |
108 | if (!str) | |
109 | return 0; | |
110 | ||
111 | if ((size == 0) || !*str) | |
112 | { | |
113 | *result = 0; | |
114 | return 0; | |
115 | } | |
116 | ||
117 | if (*str < 128) | |
118 | { | |
119 | *result = *str; | |
120 | return 1; | |
121 | } | |
122 | ||
123 | if ( (*str != 255) | |
124 | || (size < 4)) | |
125 | return -1; | |
126 | ||
127 | *result = ( ((str[1] & 0x3f) << 10) | |
128 | | ((str[2] & 0x3f) << 4) | |
129 | | (str[3] & 0xf)); | |
130 | return 4; | |
131 | } | |
132 | ||
e2806c10 | 133 | #endif /* SCM_FAKE_EXT_CHARS */ |
0f2d19dd | 134 |