added scr_lvled, a bunch of libraries, and improved framework code

[raydungeon] / libs / goat3d / src / chunk.c

diff --git a/libs/goat3d/src/chunk.c b/libs/goat3d/src/chunk.c
new file mode 100644 (file)
index 0000000..9043357
--- /dev/null
+++ b/libs/goat3d/src/chunk.c
@@ -0,0 +1,47 @@
+/*
+goat3d - 3D scene, and animation file format library.
+Copyright (C) 2013-2018  John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "goat3d.h"
+#include "chunk.h"
+
+void g3dimpl_chunk_header(struct chunk_header *hdr, int id)
+{
+       hdr->id = id;
+       hdr->size = sizeof *hdr;
+}
+
+int g3dimpl_write_chunk_header(const struct chunk_header *hdr, struct goat3d_io *io)
+{
+       io->seek(-(long)hdr->size, SEEK_CUR, io->cls);
+       if(io->write(hdr, sizeof *hdr, io->cls) < (long)sizeof *hdr) {
+               return -1;
+       }
+       return 0;
+}
+
+int g3dimpl_read_chunk_header(struct chunk_header *hdr, struct goat3d_io *io)
+{
+       if(io->read(hdr, sizeof *hdr, io->cls) < (long)sizeof *hdr) {
+               return -1;
+       }
+       return 0;
+}
+
+void g3dimpl_skip_chunk(const struct chunk_header *hdr, struct goat3d_io *io)
+{
+       io->seek(hdr->size - sizeof *hdr, SEEK_CUR, io->cls);
+}