1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * mbtowc
29 */
30
31 #pragma ident "%Z%%M% %I% %E% SMI"
32
33 #if !defined(lint) && defined(SCCSIDS)
34 static char *sccsid = "%Z%%M% %I% %E% SMI";
35 #endif
36
37 #include <stdlib.h>
38 #include "codeset.h"
39 #include "mbextern.h"
40
41 #undef mblen
42
43 int
mbtowc(pwc,s,n)44 mbtowc(pwc, s, n)
45 wchar_t * pwc;
46 char *s;
47 size_t n;
48 {
49 char *handle; /* handle */
50 int (*p)();
51 int ret;
52
53 switch (_code_set_info.code_id) {
54 case CODESET_NONE:
55 #ifdef DEBUG
56 printf ("DEFAULT: mbtowc invoked\n");
57 #endif
58 /*
59 * This is a default code set
60 */
61 if (s == NULL)
62 return (1);
63 else {
64 if (pwc != NULL)
65 *pwc = (unsigned char)*s;
66 return (1);
67 }
68 break;
69 case CODESET_EUC:
70 #ifdef DEBUG
71 printf ("EUC: mbtowc invoked\n");
72 #endif
73 /*
74 * EUC code set
75 */
76 return(_mbtowc_euc(pwc, s, n));
77 break;
78
79 case CODESET_XCCS:
80 #ifdef DEBUG
81 printf ("XCCS: mbtowc invoked\n");
82 #endif
83 /*
84 * XCCS code set
85 */
86 return(_mbtowc_xccs(pwc, s, n));
87 break;
88
89 case CODESET_ISO2022:
90 #ifdef DEBUG
91 printf ("ISO2022: mbtowc invoked\n");
92 #endif
93 /*
94 * ISO family
95 */
96 return(_mbtowc_iso(pwc, s, n));
97 break;
98
99 default:
100 /*
101 * User defined code set
102 */
103 handle = _ml_open_library();
104 if (handle == (char *)NULL)
105 return(ERROR_NO_LIB); /* No user library */
106 p = (int (*)()) dlsym(handle, "_mbtowc");
107 if (p == (int (*)()) NULL)
108 return(ERROR_NO_SYM);
109 ret = (*p)(pwc, s, n);
110 return (ret);
111 break;
112 }
113 /* NOTREACHED */
114 }
115
mblen(s,n)116 int mblen(s, n)
117 register char *s; int n;
118 {
119 int val;
120
121 if (_code_set_info.code_id != CODESET_ISO2022)
122 return (mbtowc((wchar_t *)0, s, n));
123 else {
124 /*
125 * ISO's mbtowc() changes 'states'.
126 */
127 _savestates();
128 val = mbtowc((wchar_t *)0, s, n);
129 _restorestates();
130 return (val);
131 }
132 }
133