ossp-pkg/xds/regression-tests/xds-setbuffer.c
/*
XDS - OSSP Extensible Data Serialization Library
Copyright (c) 2001 The OSSP Project (http://www.ossp.org/)
Copyright (c) 2001 Cable & Wireless Deutschland (http://www.cw.com/de/)
This file is part of OSSP XDS, an extensible data serialization
library which can be found at http://www.ossp.com/pkg/xds/.
Permission to use, copy, modify, and distribute this software for
any purpose with or without fee is hereby granted, provided that
the above copyright notice and this permission notice appear in all
copies.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
CONTRIBUTORS 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.
*/
#include <stdio.h>
#include <string.h>
#include "../internal.h"
static int dummy_engine(xds_t* xds, void* engine_context,
void* buffer, size_t buffer_size, size_t* used_buffer_size,
va_list* args)
{
assert(xds != NULL);
assert(buffer != NULL);
assert(buffer_size != 0);
assert(used_buffer_size != NULL);
assert(args != NULL);
if (buffer_size < 64)
return XDS_ERR_OVERFLOW;
else
*used_buffer_size = 64;
memset(buffer, 'a', 64);
return XDS_OK;
}
int main()
{
xds_t* xds;
char* buffer;
size_t buffer_size;
/* Create XDS context. */
xds = xds_init(XDS_ENCODE);
if (xds == NULL)
{
printf("Failed to initialize XDS context.\n");
return 1;
}
/* Register the callback. */
if (xds_register(xds, "dummy", &dummy_engine, NULL) != XDS_OK)
{
printf("Failed to register my encoding engine.\n");
return 1;
}
/* Give the library a buffer of 32 byte, call the engine once, get
the buffer back and see whether it has been enlarged or not. */
buffer_size = 32;
buffer = malloc(buffer_size);
if (buffer == NULL)
{
printf("Failed to allocate my memory.\n");
return 1;
}
if (xds_setbuffer(xds, XDS_GIFT, buffer, buffer_size) != XDS_OK)
{
printf("xds_setbuffer() failed!\n");
return 1;
}
if (xds_encode(xds, "dummy") != XDS_OK)
{
printf("xds_encode() failed!\n");
return 1;
}
if (xds_getbuffer(xds, XDS_GIFT, (void**)&buffer, &buffer_size) != XDS_OK)
{
printf("xds_getbuffer() failed!\n");
return 1;
}
if (buffer_size < 64)
{
printf("xds_encode() did not enlarge the buffer after processing the callback\n");
printf("even though all capacity was used up!\n");
return 1;
}
/* Loan the library a buffer we own, call the engine once to
exceed the buffer's capacity and check, whether the library
returns the correct error code. */
buffer = malloc(32);
if (buffer == NULL)
{
printf("Failed to allocate my memory.\n");
return 1;
}
buffer_size = 32;
if (xds_setbuffer(xds, XDS_LOAN, buffer, buffer_size) != XDS_OK)
{
printf("xds_setbuffer() failed!\n");
return 1;
}
if (xds_encode(xds, "dummy") != XDS_ERR_OVERFLOW)
{
printf("xds_encode() was supposed to fail with XDS_ERR_OVERFLOW!\n");
return 1;
}
free(buffer);
/* Clean up. */
xds_destroy(xds);
/* Everything went fine. */
return 0;
}
