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fd1b5c0f | 1 | /* Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
33a934a3 | 2 | This file is part of the GNU C Library. |
d64b6ad0 | 3 | Contributed by Ulrich Drepper <drepper@gnu.org>, 1996. |
036cc82f | 4 | |
33a934a3 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
036cc82f | 9 | |
33a934a3 UD |
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 | Library General Public License for more details. | |
036cc82f | 14 | |
33a934a3 UD |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
036cc82f RM |
19 | |
20 | #include <errno.h> | |
4bca4c17 | 21 | #include <gconv.h> |
036cc82f | 22 | #include <wchar.h> |
4bca4c17 UD |
23 | #include <wcsmbsload.h> |
24 | ||
25 | #include <assert.h> | |
036cc82f RM |
26 | |
27 | #ifndef EILSEQ | |
4bca4c17 | 28 | # define EILSEQ EINVAL |
036cc82f RM |
29 | #endif |
30 | ||
31 | ||
4bca4c17 UD |
32 | /* This is the private state used if PS is NULL. */ |
33 | static mbstate_t state; | |
036cc82f RM |
34 | |
35 | /* This is a non-standard function but it is very useful in the | |
36 | implementation of stdio because we have to deal with unterminated | |
37 | buffers. At most NWC wide character will be converted. */ | |
38 | size_t | |
39 | __wcsnrtombs (dst, src, nwc, len, ps) | |
40 | char *dst; | |
41 | const wchar_t **src; | |
42 | size_t nwc; | |
43 | size_t len; | |
44 | mbstate_t *ps; | |
45 | { | |
d64b6ad0 | 46 | struct __gconv_step_data data; |
8619129f | 47 | const wchar_t *srcend; |
4bca4c17 | 48 | int status; |
23f0c99c | 49 | size_t result; |
d64b6ad0 | 50 | struct __gconv_step *tomb; |
036cc82f | 51 | |
4bca4c17 | 52 | /* Tell where we want the result. */ |
d64b6ad0 UD |
53 | data.__invocation_counter = 0; |
54 | data.__internal_use = 1; | |
85830c4c | 55 | data.__flags = __GCONV_IS_LAST; |
d64b6ad0 | 56 | data.__statep = ps ?: &state; |
036cc82f | 57 | |
4bca4c17 UD |
58 | if (nwc == 0) |
59 | return 0; | |
8619129f | 60 | srcend = *src + __wcsnlen (*src, nwc - 1) + 1; |
036cc82f | 61 | |
4bca4c17 UD |
62 | /* Make sure we use the correct function. */ |
63 | update_conversion_ptrs (); | |
f4017d20 | 64 | |
d64b6ad0 UD |
65 | /* Get the structure with the function pointers. */ |
66 | tomb = __wcsmbs_gconv_fcts.tomb; | |
67 | ||
4bca4c17 UD |
68 | /* We have to handle DST == NULL special. */ |
69 | if (dst == NULL) | |
70 | { | |
b117f744 | 71 | unsigned char buf[256]; /* Just an arbitrary value. */ |
4bca4c17 | 72 | const wchar_t *inbuf = *src; |
23f0c99c | 73 | size_t dummy; |
f4017d20 | 74 | |
23f0c99c | 75 | result = 0; |
d64b6ad0 | 76 | data.__outbufend = buf + sizeof (buf); |
036cc82f | 77 | |
4bca4c17 | 78 | do |
d079f321 | 79 | { |
d64b6ad0 | 80 | data.__outbuf = buf; |
d079f321 | 81 | |
d64b6ad0 UD |
82 | status = (*tomb->__fct) (__wcsmbs_gconv_fcts.tomb, &data, |
83 | (const unsigned char **) &inbuf, | |
fd1b5c0f UD |
84 | (const unsigned char *) srcend, &dummy, |
85 | 0, 1); | |
23f0c99c UD |
86 | |
87 | /* Count the number of bytes. */ | |
d64b6ad0 | 88 | result += data.__outbuf - buf; |
d079f321 | 89 | } |
d64b6ad0 | 90 | while (status == __GCONV_FULL_OUTPUT); |
036cc82f | 91 | |
d64b6ad0 UD |
92 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
93 | && data.__outbuf[-1] == '\0') | |
4bca4c17 UD |
94 | /* Don't count the NUL character in. */ |
95 | --result; | |
96 | } | |
97 | else | |
98 | { | |
99 | /* This code is based on the safe assumption that all internal | |
100 | multi-byte encodings use the NUL byte only to mark the end | |
101 | of the string. */ | |
23f0c99c UD |
102 | size_t dummy; |
103 | ||
d64b6ad0 UD |
104 | data.__outbuf = dst; |
105 | data.__outbufend = dst + len; | |
4bca4c17 | 106 | |
d64b6ad0 UD |
107 | status = (*tomb->__fct) (__wcsmbs_gconv_fcts.tomb, &data, |
108 | (const unsigned char **) src, | |
fd1b5c0f | 109 | (const unsigned char *) srcend, &dummy, 0, 1); |
23f0c99c UD |
110 | |
111 | /* Count the number of bytes. */ | |
d64b6ad0 | 112 | result = data.__outbuf - (unsigned char *) dst; |
4bca4c17 UD |
113 | |
114 | /* We have to determine whether the last character converted | |
115 | is the NUL character. */ | |
d64b6ad0 UD |
116 | if ((status == __GCONV_OK || status == __GCONV_EMPTY_INPUT) |
117 | && data.__outbuf[-1] == '\0') | |
036cc82f | 118 | { |
d64b6ad0 UD |
119 | assert (data.__outbuf != (unsigned char *) dst); |
120 | assert (__mbsinit (data.__statep)); | |
036cc82f | 121 | *src = NULL; |
4bca4c17 | 122 | --result; |
036cc82f | 123 | } |
4bca4c17 | 124 | } |
036cc82f | 125 | |
4bca4c17 UD |
126 | /* There must not be any problems with the conversion but illegal input |
127 | characters. */ | |
d64b6ad0 UD |
128 | assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT |
129 | || status == __GCONV_ILLEGAL_INPUT | |
130 | || status == __GCONV_INCOMPLETE_INPUT | |
131 | || status == __GCONV_FULL_OUTPUT); | |
036cc82f | 132 | |
d64b6ad0 UD |
133 | if (status != __GCONV_OK && status != __GCONV_FULL_OUTPUT |
134 | && status != __GCONV_EMPTY_INPUT) | |
4bca4c17 UD |
135 | { |
136 | result = (size_t) -1; | |
137 | __set_errno (EILSEQ); | |
036cc82f RM |
138 | } |
139 | ||
4bca4c17 | 140 | return result; |
036cc82f RM |
141 | } |
142 | weak_alias (__wcsnrtombs, wcsnrtombs) |