goat3d
annotate src/chunk.cc @ 13:798df5111b56
moving slowly onwards
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Tue, 10 Sep 2013 15:29:45 +0300 |
| parents | |
| children | 6b651613bd9f |
| rev | line source |
|---|---|
| nuclear@13 | 1 #include "goat3d.h" |
| nuclear@13 | 2 #include "chunk.h" |
| nuclear@13 | 3 |
| nuclear@13 | 4 ChunkHeader chunk_header(int id) |
| nuclear@13 | 5 { |
| nuclear@13 | 6 ChunkHeader hdr; |
| nuclear@13 | 7 hdr.id = id; |
| nuclear@13 | 8 hdr.size = sizeof hdr; |
| nuclear@13 | 9 return hdr; |
| nuclear@13 | 10 } |
| nuclear@13 | 11 |
| nuclear@13 | 12 bool write_chunk_header(const ChunkHeader *hdr, goat3d_io *io) |
| nuclear@13 | 13 { |
| nuclear@13 | 14 io->seek(-hdr->size, SEEK_CUR, io->cls); |
| nuclear@13 | 15 if(io->write(hdr, sizeof *hdr, io->cls) < (ssize_t)sizeof *hdr) { |
| nuclear@13 | 16 return false; |
| nuclear@13 | 17 } |
| nuclear@13 | 18 return true; |
| nuclear@13 | 19 } |
| nuclear@13 | 20 |
| nuclear@13 | 21 bool read_chunk_header(ChunkHeader *hdr, goat3d_io *io) |
| nuclear@13 | 22 { |
| nuclear@13 | 23 if(io->read(hdr, sizeof *hdr, io->cls) < (ssize_t)sizeof *hdr) { |
| nuclear@13 | 24 return false; |
| nuclear@13 | 25 } |
| nuclear@13 | 26 return true; |
| nuclear@13 | 27 } |
| nuclear@13 | 28 |
| nuclear@13 | 29 void skip_chunk(const ChunkHeader *hdr, goat3d_io *io) |
| nuclear@13 | 30 { |
| nuclear@13 | 31 io->seek(hdr->size - sizeof *hdr, SEEK_CUR, io->cls); |
| nuclear@13 | 32 } |