Function jas_stream_initbuf

DevIL/src-IL/src/il_jp2.cpp:435–463

//  since they are designed to be used within JasPer only.

static void jas_stream_initbuf(jas_stream_t *stream, int bufmode )
{
	/* If this function is being called, the buffer should not have been
	  initialized yet. */
	assert(!stream->bufbase_);

	if (bufmode != JAS_STREAM_UNBUF) {
		/* The full- or line-buffered mode is being employed. */
        if ((stream->bufbase_ = (unsigned char*)jas_malloc(JAS_STREAM_BUFSIZE +
          JAS_STREAM_MAXPUTBACK))) {
            stream->bufmode_ |= JAS_STREAM_FREEBUF;
            stream->bufsize_ = JAS_STREAM_BUFSIZE;
        } else {
            /* The buffer allocation has failed.  Resort to unbuffered
              operation. */
            stream->bufbase_ = stream->tinybuf_;
            stream->bufsize_ = 1;
        }
	} else {
		/* The unbuffered mode is being employed. */
		/* Use a trivial one-character buffer. */
		stream->bufbase_ = stream->tinybuf_;
		stream->bufsize_ = 1;
	}
	stream->bufstart_ = &stream->bufbase_[JAS_STREAM_MAXPUTBACK];
	stream->ptr_ = stream->bufstart_;
	stream->cnt_ = 0;
	stream->bufmode_ |= bufmode & JAS_STREAM_BUFMODEMASK;
}

static jas_stream_t *jas_stream_create()
{