diff options
Diffstat (limited to 'src/or/buffers.c')
| -rw-r--r-- | src/or/buffers.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/or/buffers.c b/src/or/buffers.c index 17bd85eeae..d013ce2ffb 100644 --- a/src/or/buffers.c +++ b/src/or/buffers.c @@ -69,12 +69,14 @@ typedef struct chunk_t { * more than one byte long. */ } chunk_t; +#define CHUNK_HEADER_LEN STRUCT_OFFSET(chunk_t, mem[0]) + /** Return the number of bytes needed to allocate a chunk to hold * <b>memlen</b> bytes. */ -#define CHUNK_ALLOC_SIZE(memlen) (sizeof(chunk_t) + (memlen) - 1) +#define CHUNK_ALLOC_SIZE(memlen) (CHUNK_HEADER_LEN + (memlen)) /** Return the number of usable bytes in a chunk allocated with * malloc(<b>memlen</b>). */ -#define CHUNK_SIZE_WITH_ALLOC(memlen) ((memlen) - sizeof(chunk_t) + 1) +#define CHUNK_SIZE_WITH_ALLOC(memlen) ((memlen) - CHUNK_HEADER_LEN) /** Return the next character in <b>chunk</b> onto which data can be appended. * If the chunk is full, this might be off the end of chunk->mem. */ |