diff options
Diffstat (limited to 'REORG.TODO/libio/memstream.c')
| -rw-r--r-- | REORG.TODO/libio/memstream.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/REORG.TODO/libio/memstream.c b/REORG.TODO/libio/memstream.c new file mode 100644 index 0000000000..f83d4a5213 --- /dev/null +++ b/REORG.TODO/libio/memstream.c @@ -0,0 +1,139 @@ +/* Copyright (C) 1995-2017 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/>. */ + +#include "libioP.h" +#include "strfile.h" +#include <stdio.h> +#include <stdlib.h> + + +struct _IO_FILE_memstream +{ + _IO_strfile _sf; + char **bufloc; + _IO_size_t *sizeloc; +}; + + +static int _IO_mem_sync (_IO_FILE* fp) __THROW; +static void _IO_mem_finish (_IO_FILE* fp, int) __THROW; + + +static const struct _IO_jump_t _IO_mem_jumps libio_vtable = +{ + JUMP_INIT_DUMMY, + JUMP_INIT (finish, _IO_mem_finish), + JUMP_INIT (overflow, _IO_str_overflow), + JUMP_INIT (underflow, _IO_str_underflow), + JUMP_INIT (uflow, _IO_default_uflow), + JUMP_INIT (pbackfail, _IO_str_pbackfail), + JUMP_INIT (xsputn, _IO_default_xsputn), + JUMP_INIT (xsgetn, _IO_default_xsgetn), + JUMP_INIT (seekoff, _IO_str_seekoff), + JUMP_INIT (seekpos, _IO_default_seekpos), + JUMP_INIT (setbuf, _IO_default_setbuf), + JUMP_INIT (sync, _IO_mem_sync), + JUMP_INIT (doallocate, _IO_default_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_memstream (char **bufloc, _IO_size_t *sizeloc) +{ + struct locked_FILE + { + struct _IO_FILE_memstream fp; +#ifdef _IO_MTSAFE_IO + _IO_lock_t lock; +#endif + struct _IO_wide_data wd; + } *new_f; + char *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 = calloc (1, _IO_BUFSIZ); + if (buf == NULL) + { + free (new_f); + return NULL; + } + _IO_init_internal (&new_f->fp._sf._sbf._f, 0); + _IO_JUMPS_FILE_plus (&new_f->fp._sf._sbf) = &_IO_mem_jumps; + _IO_str_init_static_internal (&new_f->fp._sf, buf, _IO_BUFSIZ, 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; +} +libc_hidden_def (__open_memstream) +weak_alias (__open_memstream, open_memstream) + + +static int +_IO_mem_sync (_IO_FILE *fp) +{ + struct _IO_FILE_memstream *mp = (struct _IO_FILE_memstream *) fp; + + if (fp->_IO_write_ptr == fp->_IO_write_end) + { + _IO_str_overflow (fp, '\0'); + --fp->_IO_write_ptr; + } + + *mp->bufloc = fp->_IO_write_base; + *mp->sizeloc = fp->_IO_write_ptr - fp->_IO_write_base; + + return 0; +} + + +static void +_IO_mem_finish (_IO_FILE *fp, int dummy) +{ + struct _IO_FILE_memstream *mp = (struct _IO_FILE_memstream *) fp; + + *mp->bufloc = (char *) realloc (fp->_IO_write_base, + fp->_IO_write_ptr - fp->_IO_write_base + 1); + if (*mp->bufloc != NULL) + { + (*mp->bufloc)[fp->_IO_write_ptr - fp->_IO_write_base] = '\0'; + *mp->sizeloc = fp->_IO_write_ptr - fp->_IO_write_base; + + fp->_IO_buf_base = NULL; + } + + _IO_str_finish (fp, 0); +} |