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/* libobj/tests/test_nest.c - Tests for <libobj/obj.h>
*
* Copyright (C) 2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <string.h> /* for memcpy() */
#include <libobj/obj.h>
#include "test.h"
/* interfaces *****************************************************************/
#define reader_LO_IFACE \
LO_FUNC(ssize_t, read, void *, size_t)
LO_INTERFACE(reader)
#define writer_LO_IFACE \
LO_FUNC(ssize_t, write, void *, size_t)
LO_INTERFACE(writer)
#define read_writer_LO_IFACE \
LO_NEST(reader) \
LO_NEST(writer)
LO_INTERFACE(read_writer)
/* implementation header ******************************************************/
struct myclass {
size_t len;
char buf[512];
};
LO_IMPLEMENTATION_H(reader, struct myclass, myclass)
LO_IMPLEMENTATION_H(writer, struct myclass, myclass)
LO_IMPLEMENTATION_H(read_writer, struct myclass, myclass)
/* implementation main ********************************************************/
LO_IMPLEMENTATION_C(reader, struct myclass, myclass, static)
LO_IMPLEMENTATION_C(writer, struct myclass, myclass, static)
LO_IMPLEMENTATION_C(read_writer, struct myclass, myclass, static)
static ssize_t myclass_read(struct myclass *self, void *buf, size_t count) {
test_assert(self);
if (count > self->len)
count = self->len;
memcpy(buf, self->buf, count);
return count;
}
static ssize_t myclass_write(struct myclass *self, void *buf, size_t count) {
test_assert(self);
if (self->len)
return -1;
if (count > sizeof(self->buf))
count = sizeof(self->buf);
memcpy(self->buf, buf, count);
self->len = count;
return count;
}
/* main test body *************************************************************/
int main() {
struct myclass _obj = {0};
lo_interface read_writer obj = lo_box_myclass_as_read_writer(&_obj);
test_assert(LO_CALL(obj, write, "Hello", 6) == 6);
char buf[6] = {0};
test_assert(LO_CALL(obj, read, buf, 3) == 3);
test_assert(memcmp(buf, "Hel\0\0\0", 6) == 0);
return 0;
}
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