Skip to content
Permalink
cfcfd4614b
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
52 lines (43 sloc) 1.55 KB
/* Variable-sized buffer with on-stack default allocation.
Copyright (C) 2015 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 <scratch_buffer.h>
#include <errno.h>
bool
__libc_scratch_buffer_grow (struct scratch_buffer *buffer)
{
void *new_ptr;
size_t new_length = buffer->length * 2;
/* Discard old buffer. */
scratch_buffer_free (buffer);
/* Check for overflow. */
if (__glibc_likely (new_length >= buffer->length))
new_ptr = malloc (new_length);
else
{
__set_errno (ENOMEM);
new_ptr = NULL;
}
if (__glibc_unlikely (new_ptr == NULL))
{
/* Buffer must remain valid to free. */
scratch_buffer_init (buffer);
return false;
}
/* Install new heap-based buffer. */
buffer->data = new_ptr;
buffer->length = new_length;
return true;
}
libc_hidden_def (__libc_scratch_buffer_grow);