/* Checks if the end of stream has been reached. */
MVMint64 MVM_io_syncstream_eof(MVMThreadContext *tc, MVMOSHandle *h) {
MVMIOSyncStreamData *data = (MVMIOSyncStreamData *)h->body.data;
/* If we still have stuff in the buffer, certainly not the end (even if
* data->eof is set; that just means we read all we can from libuv, not
* that we processed it all). */
if (data->ds && !MVM_string_decodestream_is_empty(tc, data->ds))
return 0;
/* Otherwise, go on the EOF flag from the underlying stream. */
return data->eof;
}
/* Checks if the end of file has been reached. */
static MVMint64 mvm_eof(MVMThreadContext *tc, MVMOSHandle *h) {
MVMIOFileData *data = (MVMIOFileData *)h->body.data;
MVMint64 seek_pos;
uv_fs_t req;
if (data->ds && !MVM_string_decodestream_is_empty(tc, data->ds))
return 0;
if (uv_fs_fstat(tc->loop, &req, data->fd, NULL) == -1) {
MVM_exception_throw_adhoc(tc, "Failed to stat file descriptor: %s", uv_strerror(req.result));
}
if ((seek_pos = MVM_platform_lseek(data->fd, 0, SEEK_CUR)) == -1)
MVM_exception_throw_adhoc(tc, "Failed to seek in filehandle: %d", errno);
return req.statbuf.st_size == seek_pos;
}
/* Checks if the end of file has been reached. */
static MVMint64 mvm_eof(MVMThreadContext *tc, MVMOSHandle *h) {
MVMIOFileData *data = (MVMIOFileData *)h->body.data;
MVMint64 seek_pos;
uv_fs_t req;
if (data->ds && !MVM_string_decodestream_is_empty(tc, data->ds))
return 0;
if (uv_fs_fstat(tc->loop, &req, data->fd, NULL) == -1) {
MVM_exception_throw_adhoc(tc, "Failed to stat file descriptor: %s", uv_strerror(req.result));
}
if ((seek_pos = MVM_platform_lseek(data->fd, 0, SEEK_CUR)) == -1)
MVM_exception_throw_adhoc(tc, "Failed to seek in filehandle: %d", errno);
/* Comparison with seek_pos for some special files, like those in /proc,
* which file size is 0 can be false. In that case, we fall back to check
* file size to detect EOF. */
return req.statbuf.st_size == seek_pos || req.statbuf.st_size == 0;
}
