DEFAULT_BUFFER_SIZE
ctx->ibuf = malloc(DEFAULT_BUFFER_SIZE);
ctx->obuf = malloc(DEFAULT_BUFFER_SIZE);
ctx->ibuf_size = DEFAULT_BUFFER_SIZE;
ctx->obuf_size = DEFAULT_BUFFER_SIZE;
if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) {
if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) {