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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 74174676b8
commit 817ffc01e1
66 changed files with 353 additions and 364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
drivers/windows/file_access_windows.cpp
View File

@@ -188,34 +188,38 @@ String FileAccessWindows::get_path_absolute() const {
bool FileAccessWindows::is_open() const {
return (f != NULL);
}
void FileAccessWindows::seek(size_t p_position) {
void FileAccessWindows::seek(uint64_t p_position) {
ERR_FAIL_COND(!f);
last_error = OK;
if (fseek(f, p_position, SEEK_SET))
if (_fseeki64(f, p_position, SEEK_SET))
check_errors();
prev_op = 0;
}
void FileAccessWindows::seek_end(int64_t p_position) {
ERR_FAIL_COND(!f);
if (fseek(f, p_position, SEEK_END))
if (_fseeki64(f, p_position, SEEK_END))
check_errors();
prev_op = 0;
}
size_t FileAccessWindows::get_position() const {
size_t aux_position = 0;
aux_position = ftell(f);
if (!aux_position) {
uint64_t FileAccessWindows::get_position() const {
int64_t aux_position = _ftelli64(f);
if (aux_position < 0) {
check_errors();
};
}
return aux_position;
}
size_t FileAccessWindows::get_len() const {
uint64_t FileAccessWindows::get_len() const {
ERR_FAIL_COND_V(!f, 0);
size_t pos = get_position();
fseek(f, 0, SEEK_END);
int size = get_position();
fseek(f, pos, SEEK_SET);
uint64_t pos = get_position();
_fseeki64(f, 0, SEEK_END);
uint64_t size = get_position();
_fseeki64(f, pos, SEEK_SET);
return size;
}
@@ -242,17 +246,17 @@ uint8_t FileAccessWindows::get_8() const {
return b;
}
int FileAccessWindows::get_buffer(uint8_t *p_dst, int p_length) const {
uint64_t FileAccessWindows::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
ERR_FAIL_COND_V(p_length < 0, -1);
ERR_FAIL_COND_V(!f, -1);
if (flags == READ_WRITE || flags == WRITE_READ) {
if (prev_op == WRITE) {
fflush(f);
}
prev_op = READ;
}
int read = fread(p_dst, 1, p_length, f);
uint64_t read = fread(p_dst, 1, p_length, f);
check_errors();
return read;
};
@@ -281,7 +285,7 @@ void FileAccessWindows::store_8(uint8_t p_dest) {
fwrite(&p_dest, 1, 1, f);
}
void FileAccessWindows::store_buffer(const uint8_t *p_src, int p_length) {
void FileAccessWindows::store_buffer(const uint8_t *p_src, uint64_t p_length) {
ERR_FAIL_COND(!f);
if (flags == READ_WRITE || flags == WRITE_READ) {
if (prev_op == READ) {