/* libobj/tests/test_nest.c - Tests for * * Copyright (C) 2025 Luke T. Shumaker * SPDX-License-Identifier: AGPL-3.0-or-later */ #include /* for memcpy() */ #include #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; }