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/*
* Copyright © 2013 Guillem Jover <guillem@hadrons.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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 ``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.
*/
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#define ARRAY_SIZE 100
#define TEST_SIZE 50
struct test_cookie {
char array[ARRAY_SIZE];
int index;
};
static int
test_readfn(void *cookie, char *buf, int size)
{
struct test_cookie *tc = cookie;
int left_size = sizeof(tc->array) - tc->index;
if (left_size < 0)
size = 0;
else if (left_size < size)
size = left_size;
if (size > 0) {
memcpy(buf, tc->array + tc->index, size);
tc->index += size;
}
return size;
}
static int
test_writefn(void *cookie, const char *buf, int size)
{
struct test_cookie *tc = cookie;
int left_size = sizeof(tc->array) - tc->index;
if (left_size < 0)
size = 0;
else if (left_size < size)
size = left_size;
if (size > 0) {
memcpy(tc->array + tc->index, buf, size);
tc->index += size;
}
return size;
}
static off_t
test_seekfn(void *cookie, off_t offset, int whence)
{
struct test_cookie *tc = cookie;
switch (whence) {
case SEEK_SET:
tc->index = offset;
break;
case SEEK_CUR:
tc->index += offset;
break;
case SEEK_END:
tc->index = sizeof(tc->array) + offset;
break;
}
return tc->index;
}
static int
test_closefn(void *cookie)
{
struct test_cookie *tc = cookie;
memset(tc->array, 0x7f, sizeof(tc->array));
return 0;
}
int
main(int argc, char **argv)
{
struct test_cookie tc;
char data[ARRAY_SIZE];
FILE *fp;
size_t i;
/* Test invalid hooks. */
fp = funopen(&tc, NULL, NULL, NULL, NULL);
assert(fp == NULL);
assert(errno == EINVAL);
/* Test read-only file. */
tc.index = 0;
for (i = 0; i < sizeof(tc.array); i++)
tc.array[i] = i;
fp = fropen(&tc, test_readfn);
assert(fp);
assert(fread(data, 1, TEST_SIZE, fp) == TEST_SIZE);
assert(memcmp(tc.array, data, TEST_SIZE) == 0);
assert(fwrite(data, 1, TEST_SIZE, fp) == 0);
assert(fclose(fp) == 0);
/* Test write-only file. */
memset(&tc, 0, sizeof(tc));
fp = fwopen(&tc, test_writefn);
assert(fp);
setvbuf(fp, NULL, _IONBF, 0);
assert(fwrite(data, 1, TEST_SIZE, fp) == TEST_SIZE);
assert(memcmp(tc.array, data, TEST_SIZE) == 0);
assert(fread(data, 1, TEST_SIZE, fp) == 0);
assert(fclose(fp) == 0);
/* Test seekable file. */
memset(&tc, 0, sizeof(tc));
fp = funopen(&tc, test_readfn, test_writefn, test_seekfn, NULL);
assert(fp);
setvbuf(fp, NULL, _IONBF, 0);
assert(fwrite(data, 1, TEST_SIZE, fp) == TEST_SIZE);
assert(fseek(fp, 0L, SEEK_SET) == 0);
assert(fwrite(data, 1, ARRAY_SIZE, fp) == ARRAY_SIZE);
assert(memcmp(tc.array, data, ARRAY_SIZE) == 0);
assert(fread(data, 1, TEST_SIZE, fp) == 0);
assert(fclose(fp) == 0);
/* Test close hook. */
memset(&tc, 0, sizeof(tc));
fp = funopen(&tc, test_readfn, test_writefn, NULL, test_closefn);
assert(fclose(fp) == 0);
for (i = 0; i < sizeof(tc.array); i++)
assert(tc.array[i] == 0x7f);
return 0;
}
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