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/*
This file is part of libextractor.
Copyright (C) 2012 Vidyut Samanta and Christian Grothoff
libextractor is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
libextractor 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with libextractor; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file main/extractor_common.c
* @brief commonly used functions within the library
* @author Christian Grothoff
*/
#include "platform.h"
#include "extractor_common.h"
#include "extractor_logging.h"
#include "extractor.h"
#include <sys/types.h>
#include <signal.h>
/**
* Writes 'size' bytes from 'buf' to 'fd', returns only when
* writing is not possible, or when all 'size' bytes were written
* (never does partial writes).
*
* @param fd fd to write into
* @param buf buffer to read from
* @param size number of bytes to write
* @return number of bytes written (that is 'size'), or -1 on error
*/
ssize_t
EXTRACTOR_write_all_ (int fd,
const void *buf,
size_t size)
{
const char *data = buf;
size_t off = 0;
ssize_t ret;
while (off < size)
{
ret = write (fd, &data[off], size - off);
if (ret <= 0)
{
if (-1 == ret)
LOG_STRERROR ("write");
return -1;
}
off += ret;
}
return size;
}
/**
* Read a buffer from a given descriptor.
*
* @param fd descriptor to read from
* @param buf buffer to fill
* @param size number of bytes to read into 'buf'
* @return -1 on error, size on success
*/
ssize_t
EXTRACTOR_read_all_ (int fd,
void *buf,
size_t size)
{
char *data = buf;
size_t off = 0;
ssize_t ret;
while (off < size)
{
ret = read (fd, &data[off], size - off);
if (ret <= 0)
{
if (-1 == ret)
LOG_STRERROR ("write");
return -1;
}
off += ret;
}
return size;
}
/* end of extractor_common.c */
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