diff options
Diffstat (limited to 'libio/wmemstream.c')
| -rw-r--r-- | libio/wmemstream.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/libio/wmemstream.c b/libio/wmemstream.c new file mode 100644 index 0000000000..1709f2dd33 --- /dev/null +++ b/libio/wmemstream.c @@ -0,0 +1,149 @@ +/* Copyright (C) 1995-97,99,2000,2002-2004,2006 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "libioP.h" +#include "strfile.h" +#include <stdio.h> +#include <stdlib.h> + + +struct _IO_FILE_wmemstream +{ + _IO_strfile _sf; + wchar_t **bufloc; + _IO_size_t *sizeloc; +}; + + +static int _IO_wmem_sync (_IO_FILE* fp) __THROW; +static void _IO_wmem_finish (_IO_FILE* fp, int) __THROW; + + +static const struct _IO_jump_t _IO_wmem_jumps = +{ + JUMP_INIT_DUMMY, + JUMP_INIT (finish, _IO_wmem_finish), + JUMP_INIT (overflow, (_IO_overflow_t) _IO_wstr_overflow), + JUMP_INIT (underflow, (_IO_underflow_t) _IO_wstr_underflow), + JUMP_INIT (uflow, (_IO_underflow_t) INTUSE(_IO_wdefault_uflow)), + JUMP_INIT (pbackfail, (_IO_pbackfail_t) _IO_wstr_pbackfail), + JUMP_INIT (xsputn, INTUSE(_IO_wdefault_xsputn)), + JUMP_INIT (xsgetn, INTUSE(_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_wmem_sync), + JUMP_INIT (doallocate, INTUSE(_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) +}; + +/* Open a stream that writes into a malloc'd buffer that is expanded as + necessary. *BUFLOC and *SIZELOC are updated with the buffer's location + and the number of characters written on fflush or fclose. */ +_IO_FILE * +open_wmemstream (bufloc, sizeloc) + wchar_t **bufloc; + _IO_size_t *sizeloc; +{ + struct locked_FILE + { + struct _IO_FILE_wmemstream fp; +#ifdef _IO_MTSAFE_IO + _IO_lock_t lock; +#endif + struct _IO_wide_data wd; + } *new_f; + wchar_t *buf; + + new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE)); + if (new_f == NULL) + return NULL; +#ifdef _IO_MTSAFE_IO + new_f->fp._sf._sbf._f._lock = &new_f->lock; +#endif + + buf = malloc (_IO_BUFSIZ); + if (buf == NULL) + return NULL; + + _IO_no_init (&new_f->fp._sf._sbf._f, 0, 0, &new_f->wd, &_IO_wmem_jumps); + _IO_fwide (&new_f->fp._sf._sbf._f, 1); + _IO_wstr_init_static (&new_f->fp._sf._sbf._f, buf, + _IO_BUFSIZ / sizeof (wchar_t), buf); + new_f->fp._sf._sbf._f._flags &= ~_IO_USER_BUF; + new_f->fp._sf._s._allocate_buffer = (_IO_alloc_type) malloc; + new_f->fp._sf._s._free_buffer = (_IO_free_type) free; + + new_f->fp.bufloc = bufloc; + new_f->fp.sizeloc = sizeloc; + + return (_IO_FILE *) &new_f->fp._sf._sbf; +} + + +static int +_IO_wmem_sync (fp) + _IO_FILE* fp; +{ + struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp; + + if (fp->_wide_data->_IO_write_ptr == fp->_wide_data->_IO_write_end) + { + _IO_wstr_overflow (fp, '\0'); + --fp->_wide_data->_IO_write_ptr; + } + else + *fp->_wide_data->_IO_write_ptr = '\0'; + + *mp->bufloc = fp->_wide_data->_IO_write_base; + *mp->sizeloc = (fp->_wide_data->_IO_write_ptr + - fp->_wide_data->_IO_write_base); + + return 0; +} + + +static void +_IO_wmem_finish (fp, dummy) + _IO_FILE* fp; + int dummy; +{ + struct _IO_FILE_wmemstream *mp = (struct _IO_FILE_wmemstream *) fp; + + *mp->bufloc = (wchar_t *) realloc (fp->_wide_data->_IO_write_base, + (fp->_wide_data->_IO_write_ptr + - fp->_wide_data->_IO_write_base + 1) + * sizeof (wchar_t)); + if (*mp->bufloc != NULL) + { + size_t len = (fp->_wide_data->_IO_write_ptr + - fp->_wide_data->_IO_write_base); + (*mp->bufloc)[len] = '\0'; + *mp->sizeloc = len; + + fp->_wide_data->_IO_buf_base = NULL; + } + + _IO_wstr_finish (fp, 0); +} |