diff options
Diffstat (limited to 'REORG.TODO/libio/vswprintf.c')
| -rw-r--r-- | REORG.TODO/libio/vswprintf.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/REORG.TODO/libio/vswprintf.c b/REORG.TODO/libio/vswprintf.c new file mode 100644 index 0000000000..fc78bc9e95 --- /dev/null +++ b/REORG.TODO/libio/vswprintf.c @@ -0,0 +1,124 @@ +/* Copyright (C) 1994-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. + + As a special exception, if you link the code in this file with + files compiled with a GNU compiler to produce an executable, + that does not cause the resulting executable to be covered by + the GNU Lesser General Public License. This exception does not + however invalidate any other reasons why the executable file + might be covered by the GNU Lesser General Public License. + This exception applies to code released by its copyright holders + in files containing the exception. */ + +#include "libioP.h" +#include "strfile.h" + + +static wint_t _IO_wstrn_overflow (_IO_FILE *fp, wint_t c) __THROW; + +static wint_t +_IO_wstrn_overflow (_IO_FILE *fp, wint_t c) +{ + /* When we come to here this means the user supplied buffer is + filled. But since we must return the number of characters which + would have been written in total we must provide a buffer for + further use. We can do this by writing on and on in the overflow + buffer in the _IO_wstrnfile structure. */ + _IO_wstrnfile *snf = (_IO_wstrnfile *) fp; + + if (fp->_wide_data->_IO_buf_base != snf->overflow_buf) + { + _IO_wsetb (fp, snf->overflow_buf, + snf->overflow_buf + (sizeof (snf->overflow_buf) + / sizeof (wchar_t)), 0); + + fp->_wide_data->_IO_write_base = snf->overflow_buf; + fp->_wide_data->_IO_read_base = snf->overflow_buf; + fp->_wide_data->_IO_read_ptr = snf->overflow_buf; + fp->_wide_data->_IO_read_end = (snf->overflow_buf + + (sizeof (snf->overflow_buf) + / sizeof (wchar_t))); + } + + fp->_wide_data->_IO_write_ptr = snf->overflow_buf; + fp->_wide_data->_IO_write_end = snf->overflow_buf; + + /* Since we are not really interested in storing the characters + which do not fit in the buffer we simply ignore it. */ + return c; +} + + +const struct _IO_jump_t _IO_wstrn_jumps libio_vtable attribute_hidden = +{ + JUMP_INIT_DUMMY, + JUMP_INIT(finish, _IO_wstr_finish), + JUMP_INIT(overflow, (_IO_overflow_t) _IO_wstrn_overflow), + JUMP_INIT(underflow, (_IO_underflow_t) _IO_wstr_underflow), + JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow), + JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail), + JUMP_INIT(xsputn, _IO_wdefault_xsputn), + JUMP_INIT(xsgetn, _IO_wdefault_xsgetn), + JUMP_INIT(seekoff, _IO_wstr_seekoff), + JUMP_INIT(seekpos, _IO_default_seekpos), + JUMP_INIT(setbuf, _IO_default_setbuf), + JUMP_INIT(sync, _IO_default_sync), + JUMP_INIT(doallocate, _IO_wdefault_doallocate), + JUMP_INIT(read, _IO_default_read), + JUMP_INIT(write, _IO_default_write), + JUMP_INIT(seek, _IO_default_seek), + JUMP_INIT(close, _IO_default_close), + JUMP_INIT(stat, _IO_default_stat), + JUMP_INIT(showmanyc, _IO_default_showmanyc), + JUMP_INIT(imbue, _IO_default_imbue) +}; + + +int +_IO_vswprintf (wchar_t *string, _IO_size_t maxlen, const wchar_t *format, + _IO_va_list args) +{ + _IO_wstrnfile sf; + int ret; + struct _IO_wide_data wd; +#ifdef _IO_MTSAFE_IO + sf.f._sbf._f._lock = NULL; +#endif + + if (maxlen == 0) + /* Since we have to write at least the terminating L'\0' a buffer + length of zero always makes the function fail. */ + return -1; + + _IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, 0, &wd, &_IO_wstrn_jumps); + _IO_fwide (&sf.f._sbf._f, 1); + string[0] = L'\0'; + _IO_wstr_init_static (&sf.f._sbf._f, string, maxlen - 1, string); + ret = _IO_vfwprintf ((_IO_FILE *) &sf.f._sbf, format, args); + + if (sf.f._sbf._f._wide_data->_IO_buf_base == sf.overflow_buf) + /* ISO C99 requires swprintf/vswprintf to return an error if the + output does not fit in the provided buffer. */ + return -1; + + /* Terminate the string. */ + *sf.f._sbf._f._wide_data->_IO_write_ptr = '\0'; + + return ret; +} +weak_alias (_IO_vswprintf, __vswprintf) +ldbl_weak_alias (_IO_vswprintf, vswprintf) |