/* Reads the specified number of bytes into a the supplied buffer, returing
* the number actually read. */
MVMint64 MVM_io_syncstream_read_bytes(MVMThreadContext *tc, MVMOSHandle *h, char **buf, MVMint64 bytes) {
MVMIOSyncStreamData *data = (MVMIOSyncStreamData *)h->body.data;
ensure_decode_stream(tc, data);
/* See if we've already enough; if not, try and grab more. */
if (!MVM_string_decodestream_have_bytes(tc, data->ds, bytes))
read_to_buffer(tc, data, bytes > CHUNK_SIZE ? bytes : CHUNK_SIZE);
/* Read as many as we can, up to the limit. */
return MVM_string_decodestream_bytes_to_buf(tc, data->ds, buf, bytes);
}
/* Reads the specified number of bytes into a the supplied buffer, returing
* the number actually read. */
static MVMint64 read_bytes(MVMThreadContext *tc, MVMOSHandle *h, char **buf, MVMint64 bytes) {
MVMIOFileData *data = (MVMIOFileData *)h->body.data;
ensure_decode_stream(tc, data);
/* Keep requesting bytes until we have enough in the buffer or we hit
* end of file. */
while (!MVM_string_decodestream_have_bytes(tc, data->ds, bytes)) {
if (read_to_buffer(tc, data, bytes) <= 0)
break;
}
/* Read as many as we can, up to the limit. */
return MVM_string_decodestream_bytes_to_buf(tc, data->ds, buf, bytes);
}
