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bfff8b1b | 1 | /* Copyright (C) 2002-2017 Free Software Foundation, Inc. |
01beb5b9 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 2002. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
01beb5b9 | 18 | |
915a6c51 | 19 | #include <assert.h> |
01beb5b9 UD |
20 | #include <ctype.h> |
21 | #include <string.h> | |
22 | #include "wcsmbsload.h" | |
b3e09193 UD |
23 | #include <dlfcn.h> |
24 | #include <errno.h> | |
25 | #include <gconv.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <wchar.h> | |
29 | #include <wcsmbsload.h> | |
30 | ||
915a6c51 | 31 | #include <sysdep.h> |
b3e09193 UD |
32 | |
33 | #ifndef EILSEQ | |
34 | # define EILSEQ EINVAL | |
35 | #endif | |
36 | ||
37 | ||
38 | size_t | |
39 | attribute_hidden | |
9dd346ff JM |
40 | __mbsrtowcs_l (wchar_t *dst, const char **src, size_t len, mbstate_t *ps, |
41 | __locale_t l) | |
b3e09193 UD |
42 | { |
43 | struct __gconv_step_data data; | |
44 | size_t result; | |
45 | int status; | |
46 | struct __gconv_step *towc; | |
47 | size_t non_reversible; | |
48 | const struct gconv_fcts *fcts; | |
49 | ||
50 | /* Tell where we want the result. */ | |
51 | data.__invocation_counter = 0; | |
52 | data.__internal_use = 1; | |
53 | data.__flags = __GCONV_IS_LAST; | |
54 | data.__statep = ps; | |
b3e09193 UD |
55 | |
56 | /* Get the conversion functions. */ | |
57 | fcts = get_gconv_fcts (l->__locales[LC_CTYPE]); | |
58 | ||
59 | /* Get the structure with the function pointers. */ | |
60 | towc = fcts->towc; | |
915a6c51 UD |
61 | __gconv_fct fct = towc->__fct; |
62 | #ifdef PTR_DEMANGLE | |
63 | if (towc->__shlib_handle != NULL) | |
64 | PTR_DEMANGLE (fct); | |
65 | #endif | |
b3e09193 UD |
66 | |
67 | /* We have to handle DST == NULL special. */ | |
68 | if (dst == NULL) | |
69 | { | |
70 | mbstate_t temp_state; | |
71 | wchar_t buf[64]; /* Just an arbitrary size. */ | |
72 | const unsigned char *inbuf = (const unsigned char *) *src; | |
1c99f950 | 73 | const unsigned char *srcend = inbuf + strlen (*src) + 1; |
b3e09193 UD |
74 | |
75 | temp_state = *data.__statep; | |
76 | data.__statep = &temp_state; | |
77 | ||
78 | result = 0; | |
1c99f950 | 79 | data.__outbufend = (unsigned char *) buf + sizeof (buf); |
b3e09193 UD |
80 | do |
81 | { | |
1c99f950 | 82 | data.__outbuf = (unsigned char *) buf; |
b3e09193 | 83 | |
915a6c51 UD |
84 | status = DL_CALL_FCT (fct, (towc, &data, &inbuf, srcend, NULL, |
85 | &non_reversible, 0, 1)); | |
b3e09193 UD |
86 | |
87 | result += (wchar_t *) data.__outbuf - buf; | |
88 | } | |
89 | while (status == __GCONV_FULL_OUTPUT); | |
90 | ||
91 | if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) | |
92 | { | |
93 | /* There better should be a NUL wide char at the end. */ | |
94 | assert (((wchar_t *) data.__outbuf)[-1] == L'\0'); | |
95 | /* Don't count the NUL character in. */ | |
96 | --result; | |
97 | } | |
98 | } | |
99 | else | |
100 | { | |
101 | /* This code is based on the safe assumption that all internal | |
102 | multi-byte encodings use the NUL byte only to mark the end | |
103 | of the string. */ | |
d012b7df | 104 | const unsigned char *srcp = (const unsigned char *) *src; |
b3e09193 UD |
105 | const unsigned char *srcend; |
106 | ||
b3e09193 UD |
107 | data.__outbuf = (unsigned char *) dst; |
108 | data.__outbufend = data.__outbuf + len * sizeof (wchar_t); | |
109 | ||
d012b7df UD |
110 | status = __GCONV_FULL_OUTPUT; |
111 | ||
112 | while (len > 0) | |
113 | { | |
114 | /* Pessimistic guess as to how much input we can use. In the | |
115 | worst case we need one input byte for one output wchar_t. */ | |
1c99f950 | 116 | srcend = srcp + __strnlen ((const char *) srcp, len) + 1; |
d012b7df | 117 | |
915a6c51 UD |
118 | status = DL_CALL_FCT (fct, (towc, &data, &srcp, srcend, NULL, |
119 | &non_reversible, 0, 1)); | |
d012b7df UD |
120 | if ((status != __GCONV_EMPTY_INPUT |
121 | && status != __GCONV_INCOMPLETE_INPUT) | |
122 | /* Not all input read. */ | |
123 | || srcp != srcend | |
124 | /* Reached the end of the input. */ | |
125 | || srcend[-1] == '\0') | |
126 | break; | |
127 | ||
128 | len = (wchar_t *) data.__outbufend - (wchar_t *) data.__outbuf; | |
129 | } | |
130 | ||
131 | /* Make the end if the input known to the caller. */ | |
1c99f950 | 132 | *src = (const char *) srcp; |
b3e09193 UD |
133 | |
134 | result = (wchar_t *) data.__outbuf - dst; | |
135 | ||
136 | /* We have to determine whether the last character converted | |
137 | is the NUL character. */ | |
138 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) | |
139 | && ((wchar_t *) dst)[result - 1] == L'\0') | |
140 | { | |
141 | assert (result > 0); | |
142 | assert (__mbsinit (data.__statep)); | |
143 | *src = NULL; | |
144 | --result; | |
145 | } | |
146 | } | |
147 | ||
148 | /* There must not be any problems with the conversion but illegal input | |
149 | characters. */ | |
150 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT | |
151 | || status == __GCONV_ILLEGAL_INPUT | |
152 | || status == __GCONV_INCOMPLETE_INPUT | |
153 | || status == __GCONV_FULL_OUTPUT); | |
154 | ||
155 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT | |
156 | && status != __GCONV_EMPTY_INPUT && status != __GCONV_INCOMPLETE_INPUT) | |
157 | { | |
158 | result = (size_t) -1; | |
159 | __set_errno (EILSEQ); | |
160 | } | |
01beb5b9 | 161 | |
b3e09193 UD |
162 | return result; |
163 | } |