Make all file access 64-bit (uint64_t)

This changes the types of a big number of variables.

General rules:
- Using `uint64_t` in general. We also considered `int64_t` but eventually
  settled on keeping it unsigned, which is also closer to what one would expect
  with `size_t`/`off_t`.
- We only keep `int64_t` for `seek_end` (takes a negative offset from the end)
  and for the `Variant` bindings, since `Variant::INT` is `int64_t`. This means
  we only need to guard against passing negative values in `core_bind.cpp`.
- Using `uint32_t` integers for concepts not needing such a huge range, like
  pages, blocks, etc.

In addition:
- Improve usage of integer types in some related places; namely, `DirAccess`,
  core binds.

Note:
- On Windows, `_ftelli64` reports invalid values when using 32-bit MinGW with
  version < 8.0. This was an upstream bug fixed in 8.0. It breaks support for
  big files on 32-bit Windows builds made with that toolchain. We might add a
  workaround.

Fixes #44363.
Fixes godotengine/godot-proposals#400.

Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/modules/theora/video_stream_theora.cpp b/modules/theora/video_stream_theora.cpp
index 54f5b3f424..7b421bdc16 100644
--- a/modules/theora/video_stream_theora.cpp
+++ b/modules/theora/video_stream_theora.cpp
@@ -58,7 +58,7 @@ int VideoStreamPlaybackTheora::buffer_data() {
 
 #else
 
-	int bytes = file->get_buffer((uint8_t *)buffer, 4096);
+	uint64_t bytes = file->get_buffer((uint8_t *)buffer, 4096);
 	ogg_sync_wrote(&oy, bytes);
 	return (bytes);
 
@@ -176,7 +176,7 @@ void VideoStreamPlaybackTheora::set_file(const String &p_file) {
 	thread_eof = false;
 	//pre-fill buffer
 	int to_read = ring_buffer.space_left();
-	int read = file->get_buffer(read_buffer.ptr(), to_read);
+	uint64_t read = file->get_buffer(read_buffer.ptr(), to_read);
 	ring_buffer.write(read_buffer.ptr(), read);
 
 	thread.start(_streaming_thread, this);
@@ -632,8 +632,8 @@ void VideoStreamPlaybackTheora::_streaming_thread(void *ud) {
 		//just fill back the buffer
 		if (!vs->thread_eof) {
 			int to_read = vs->ring_buffer.space_left();
-			if (to_read) {
-				int read = vs->file->get_buffer(vs->read_buffer.ptr(), to_read);
+			if (to_read > 0) {
+				uint64_t read = vs->file->get_buffer(vs->read_buffer.ptr(), to_read);
 				vs->ring_buffer.write(vs->read_buffer.ptr(), read);
 				vs->thread_eof = vs->file->eof_reached();
 			}