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8215c9ec | 1 | /* Copyright (C) 1994,1997,1999-2002,2004,2005 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
d64b6ad0 | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
d64b6ad0 | 8 | |
41bdb6e2 AJ |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
d64b6ad0 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
12 | Lesser General Public License for more details. |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. | |
18 | ||
19 | As a special exception, if you link the code in this file with | |
20 | files compiled with a GNU compiler to produce an executable, | |
21 | that does not cause the resulting executable to be covered by | |
22 | the GNU Lesser General Public License. This exception does not | |
23 | however invalidate any other reasons why the executable file | |
24 | might be covered by the GNU Lesser General Public License. | |
25 | This exception applies to code released by its copyright holders | |
26 | in files containing the exception. */ | |
d64b6ad0 UD |
27 | |
28 | #include "libioP.h" | |
29 | #include "strfile.h" | |
30 | ||
31 | ||
79937577 | 32 | static wint_t _IO_wstrn_overflow (_IO_FILE *fp, wint_t c) __THROW; |
d64b6ad0 UD |
33 | |
34 | static wint_t | |
35 | _IO_wstrn_overflow (fp, c) | |
36 | _IO_FILE *fp; | |
37 | wint_t c; | |
38 | { | |
39 | /* When we come to here this means the user supplied buffer is | |
40 | filled. But since we must return the number of characters which | |
41 | would have been written in total we must provide a buffer for | |
42 | further use. We can do this by writing on and on in the overflow | |
b5cc329c UD |
43 | buffer in the _IO_wstrnfile structure. */ |
44 | _IO_wstrnfile *snf = (_IO_wstrnfile *) fp; | |
d64b6ad0 UD |
45 | |
46 | if (fp->_wide_data->_IO_buf_base != snf->overflow_buf) | |
47 | { | |
77fe0b9c UD |
48 | INTUSE(_IO_wsetb) (fp, snf->overflow_buf, |
49 | snf->overflow_buf + (sizeof (snf->overflow_buf) | |
50 | / sizeof (wchar_t)), 0); | |
d64b6ad0 UD |
51 | |
52 | fp->_wide_data->_IO_write_base = snf->overflow_buf; | |
53 | fp->_wide_data->_IO_read_base = snf->overflow_buf; | |
54 | fp->_wide_data->_IO_read_ptr = snf->overflow_buf; | |
55 | fp->_wide_data->_IO_read_end = (snf->overflow_buf | |
56 | + (sizeof (snf->overflow_buf) | |
57 | / sizeof (wchar_t))); | |
58 | } | |
59 | ||
60 | fp->_wide_data->_IO_write_ptr = snf->overflow_buf; | |
61 | fp->_wide_data->_IO_write_end = snf->overflow_buf; | |
62 | ||
63 | /* Since we are not really interested in storing the characters | |
64 | which do not fit in the buffer we simply ignore it. */ | |
65 | return c; | |
66 | } | |
67 | ||
68 | ||
8215c9ec | 69 | const struct _IO_jump_t _IO_wstrn_jumps attribute_hidden = |
d64b6ad0 UD |
70 | { |
71 | JUMP_INIT_DUMMY, | |
72 | JUMP_INIT(finish, _IO_wstr_finish), | |
73 | JUMP_INIT(overflow, (_IO_overflow_t) _IO_wstrn_overflow), | |
74 | JUMP_INIT(underflow, (_IO_underflow_t) _IO_wstr_underflow), | |
77fe0b9c | 75 | JUMP_INIT(uflow, (_IO_underflow_t) INTUSE(_IO_wdefault_uflow)), |
d64b6ad0 | 76 | JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail), |
77fe0b9c UD |
77 | JUMP_INIT(xsputn, INTUSE(_IO_wdefault_xsputn)), |
78 | JUMP_INIT(xsgetn, INTUSE(_IO_wdefault_xsgetn)), | |
d64b6ad0 UD |
79 | JUMP_INIT(seekoff, _IO_wstr_seekoff), |
80 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
bff334e0 | 81 | JUMP_INIT(setbuf, _IO_default_setbuf), |
d64b6ad0 | 82 | JUMP_INIT(sync, _IO_default_sync), |
77fe0b9c | 83 | JUMP_INIT(doallocate, INTUSE(_IO_wdefault_doallocate)), |
d64b6ad0 UD |
84 | JUMP_INIT(read, _IO_default_read), |
85 | JUMP_INIT(write, _IO_default_write), | |
86 | JUMP_INIT(seek, _IO_default_seek), | |
87 | JUMP_INIT(close, _IO_default_close), | |
88 | JUMP_INIT(stat, _IO_default_stat), | |
89 | JUMP_INIT(showmanyc, _IO_default_showmanyc), | |
90 | JUMP_INIT(imbue, _IO_default_imbue) | |
91 | }; | |
92 | ||
93 | ||
94 | int | |
95 | _IO_vswprintf (string, maxlen, format, args) | |
96 | wchar_t *string; | |
97 | _IO_size_t maxlen; | |
98 | const wchar_t *format; | |
99 | _IO_va_list args; | |
100 | { | |
b5cc329c | 101 | _IO_wstrnfile sf; |
d64b6ad0 UD |
102 | int ret; |
103 | struct _IO_wide_data wd; | |
104 | #ifdef _IO_MTSAFE_IO | |
c020d48c | 105 | sf.f._sbf._f._lock = NULL; |
d64b6ad0 UD |
106 | #endif |
107 | ||
d64b6ad0 | 108 | if (maxlen == 0) |
5569e0a6 UD |
109 | /* Since we have to write at least the terminating L'\0' a buffer |
110 | length of zero always makes the function fail. */ | |
111 | return -1; | |
d64b6ad0 | 112 | |
c020d48c | 113 | _IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstrn_jumps); |
d64b6ad0 UD |
114 | _IO_fwide (&sf.f._sbf._f, 1); |
115 | string[0] = L'\0'; | |
e1b13a63 | 116 | _IO_wstr_init_static (&sf.f._sbf._f, string, maxlen - 1, string); |
41d998a6 | 117 | ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args); |
d64b6ad0 | 118 | |
5569e0a6 UD |
119 | if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf) |
120 | /* ISO C99 requires swprintf/vswprintf to return an error if the | |
121 | output does not fit int he provided buffer. */ | |
122 | return -1; | |
123 | ||
124 | /* Terminate the string. */ | |
125 | *sf.f._sbf._f._wide_data->_IO_write_ptr = '\0'; | |
126 | ||
d64b6ad0 UD |
127 | return ret; |
128 | } | |
a334319f UD |
129 | |
130 | #ifdef weak_alias | |
d64b6ad0 | 131 | weak_alias (_IO_vswprintf, __vswprintf) |
a334319f UD |
132 | weak_alias (_IO_vswprintf, vswprintf) |
133 | #endif |