/* Gets the specified number of characters from the stream. */
MVMString * MVM_io_syncstream_read_chars(MVMThreadContext *tc, MVMOSHandle *h, MVMint64 chars) {
MVMIOSyncStreamData *data = (MVMIOSyncStreamData *)h->body.data;
MVMString *result;
ensure_decode_stream(tc, data);
/* Do we already have the chars available? */
result = MVM_string_decodestream_get_chars(tc, data->ds, chars);
if (result) {
return result;
}
else {
/* No; read and try again. */
read_to_buffer(tc, data, CHUNK_SIZE);
result = MVM_string_decodestream_get_chars(tc, data->ds, chars);
if (result != NULL)
return result;
}
/* Fetched all we immediately can, so just take what we have. */
return MVM_string_decodestream_get_all(tc, data->ds);
}
/* Gets the specified number of characters from the file. */
static MVMString * read_chars(MVMThreadContext *tc, MVMOSHandle *h, MVMint64 chars) {
MVMIOFileData *data = (MVMIOFileData *)h->body.data;
ensure_decode_stream(tc, data);
/* Pull data until we can read the chars we want. */
do {
MVMString *result = MVM_string_decodestream_get_chars(tc, data->ds, chars);
if (result != NULL)
return result;
} while (read_to_buffer(tc, data, CHUNK_SIZE) > 0);
/* Reached end of file, so just take what we have. */
return MVM_string_decodestream_get_all(tc, data->ds);
}
