/*
* Copyright (c) 2018 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libc
* @{
*/
/** @file
*/
#include <stdio.h>
#include <str.h>
#include <errno.h>
#include <adt/list.h>
#include <uchar.h>
#include "../private/stdio.h"
#include "../private/sstream.h"
static size_t stdio_str_read(void *, size_t, size_t, FILE *);
static size_t stdio_str_write(const void *, size_t, size_t, FILE *);
static int stdio_str_flush(FILE *);
static __stream_ops_t stdio_str_ops = {
.read = stdio_str_read,
.write = stdio_str_write,
.flush = stdio_str_flush
};
/** Read from string stream. */
static size_t stdio_str_read(void *buf, size_t size, size_t nmemb, FILE *stream)
{
size_t nread;
char *cp = (char *)stream->arg;
char *bp = (char *)buf;
nread = 0;
while (nread < size * nmemb) {
if (*cp == '\0') {
stream->eof = true;
break;
}
bp[nread] = *cp;
++nread;
++cp;
stream->arg = (void *)cp;
}
return (nread / size);
}
/** Write to string stream. */
static size_t stdio_str_write(const void *buf, size_t size, size_t nmemb,
FILE *stream)
{
return 0;
}
/** Flush string stream. */
static int stdio_str_flush(FILE *stream)
{
return EOF;
}
/** Initialize string stream.
*
* @param str String used as backend for reading
* @param stream Stream to initialize
*/
void __sstream_init(const char *str, FILE *stream)
{
memset(stream, 0, sizeof(FILE));
stream->ops = &stdio_str_ops;
stream->arg = (void *)str;
}
/** Return current string stream position.
*
* @param stream String stream
* @return Pointer into the backing string at the current position
*/
const char *__sstream_getpos(FILE *stream)
{
assert(stream->ops == &stdio_str_ops);
return (char *) stream->arg;
}
/** @}
*/