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Make all file access 64-bit (uint64_t)

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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>
This commit is contained in:
Pedro J. Estébanez
2019-03-26 18:51:13 +01:00
committed by Rémi Verschelde
parent 9cc17a8439
commit 469fa47e06
65 changed files with 326 additions and 342 deletions
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8
core/core_bind.h
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@ -390,8 +390,8 @@ public:
void seek(int64_t p_position); // Seek to a given position.
void seek_end(int64_t p_position = 0); // Seek from the end of file.
int64_t get_position() const; // Get position in the file.
int64_t get_len() const; // Get size of the file.
uint64_t get_position() const; // Get position in the file.
uint64_t get_len() const; // Get size of the file.
bool eof_reached() const; // Reading passed EOF.
@ -406,7 +406,7 @@ public:
Variant get_var(bool p_allow_objects = false) const;
Vector<uint8_t> get_buffer(int p_length) const; // Get an array of bytes.
Vector<uint8_t> get_buffer(int64_t p_length) const; // Get an array of bytes.
String get_line() const;
Vector<String> get_csv_line(const String &p_delim = ",") const;
String get_as_text() const;
@ -486,7 +486,7 @@ public:
bool file_exists(String p_file);
bool dir_exists(String p_dir);
int get_space_left();
uint64_t get_space_left();
Error copy(String p_from, String p_to);
Error rename(String p_from, String p_to);