godot/platform/android/dir_access_jandroid.cpp
Pedro J. Estébanez 469fa47e06
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>
2021-05-17 15:06:19 +02:00

230 lines
6.6 KiB
C++

/*************************************************************************/
/* dir_access_jandroid.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
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/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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#include "dir_access_jandroid.h"
#include "core/string/print_string.h"
#include "file_access_android.h"
#include "string_android.h"
#include "thread_jandroid.h"
jobject DirAccessJAndroid::io = nullptr;
jclass DirAccessJAndroid::cls = nullptr;
jmethodID DirAccessJAndroid::_dir_open = nullptr;
jmethodID DirAccessJAndroid::_dir_next = nullptr;
jmethodID DirAccessJAndroid::_dir_close = nullptr;
jmethodID DirAccessJAndroid::_dir_is_dir = nullptr;
DirAccess *DirAccessJAndroid::create_fs() {
return memnew(DirAccessJAndroid);
}
Error DirAccessJAndroid::list_dir_begin() {
list_dir_end();
JNIEnv *env = get_jni_env();
jstring js = env->NewStringUTF(current_dir.utf8().get_data());
int res = env->CallIntMethod(io, _dir_open, js);
if (res <= 0)
return ERR_CANT_OPEN;
id = res;
return OK;
}
String DirAccessJAndroid::get_next() {
ERR_FAIL_COND_V(id == 0, "");
JNIEnv *env = get_jni_env();
jstring str = (jstring)env->CallObjectMethod(io, _dir_next, id);
if (!str)
return "";
String ret = jstring_to_string((jstring)str, env);
env->DeleteLocalRef((jobject)str);
return ret;
}
bool DirAccessJAndroid::current_is_dir() const {
JNIEnv *env = get_jni_env();
return env->CallBooleanMethod(io, _dir_is_dir, id);
}
bool DirAccessJAndroid::current_is_hidden() const {
return current != "." && current != ".." && current.begins_with(".");
}
void DirAccessJAndroid::list_dir_end() {
if (id == 0)
return;
JNIEnv *env = get_jni_env();
env->CallVoidMethod(io, _dir_close, id);
id = 0;
}
int DirAccessJAndroid::get_drive_count() {
return 0;
}
String DirAccessJAndroid::get_drive(int p_drive) {
return "";
}
Error DirAccessJAndroid::change_dir(String p_dir) {
JNIEnv *env = get_jni_env();
if (p_dir == "" || p_dir == "." || (p_dir == ".." && current_dir == ""))
return OK;
String new_dir;
if (p_dir != "res://" && p_dir.length() > 1 && p_dir.ends_with("/"))
p_dir = p_dir.substr(0, p_dir.length() - 1);
if (p_dir.begins_with("/"))
new_dir = p_dir.substr(1, p_dir.length());
else if (p_dir.begins_with("res://"))
new_dir = p_dir.substr(6, p_dir.length());
else if (current_dir == "")
new_dir = p_dir;
else
new_dir = current_dir.plus_file(p_dir);
//test if newdir exists
new_dir = new_dir.simplify_path();
jstring js = env->NewStringUTF(new_dir.utf8().get_data());
int res = env->CallIntMethod(io, _dir_open, js);
env->DeleteLocalRef(js);
if (res <= 0)
return ERR_INVALID_PARAMETER;
env->CallVoidMethod(io, _dir_close, res);
current_dir = new_dir;
return OK;
}
String DirAccessJAndroid::get_current_dir(bool p_include_drive) {
return "res://" + current_dir;
}
bool DirAccessJAndroid::file_exists(String p_file) {
String sd;
if (current_dir == "")
sd = p_file;
else
sd = current_dir.plus_file(p_file);
FileAccessAndroid *f = memnew(FileAccessAndroid);
bool exists = f->file_exists(sd);
memdelete(f);
return exists;
}
bool DirAccessJAndroid::dir_exists(String p_dir) {
JNIEnv *env = get_jni_env();
String sd;
if (current_dir == "")
sd = p_dir;
else {
if (p_dir.is_rel_path())
sd = current_dir.plus_file(p_dir);
else
sd = fix_path(p_dir);
}
String path = sd.simplify_path();
if (path.begins_with("/"))
path = path.substr(1, path.length());
else if (path.begins_with("res://"))
path = path.substr(6, path.length());
jstring js = env->NewStringUTF(path.utf8().get_data());
int res = env->CallIntMethod(io, _dir_open, js);
env->DeleteLocalRef(js);
if (res <= 0)
return false;
env->CallVoidMethod(io, _dir_close, res);
return true;
}
Error DirAccessJAndroid::make_dir(String p_dir) {
ERR_FAIL_V(ERR_UNAVAILABLE);
}
Error DirAccessJAndroid::rename(String p_from, String p_to) {
ERR_FAIL_V(ERR_UNAVAILABLE);
}
Error DirAccessJAndroid::remove(String p_name) {
ERR_FAIL_V(ERR_UNAVAILABLE);
}
String DirAccessJAndroid::get_filesystem_type() const {
return "APK";
}
uint64_t DirAccessJAndroid::get_space_left() {
return 0;
}
void DirAccessJAndroid::setup(jobject p_io) {
JNIEnv *env = get_jni_env();
io = p_io;
jclass c = env->GetObjectClass(io);
cls = (jclass)env->NewGlobalRef(c);
_dir_open = env->GetMethodID(cls, "dir_open", "(Ljava/lang/String;)I");
_dir_next = env->GetMethodID(cls, "dir_next", "(I)Ljava/lang/String;");
_dir_close = env->GetMethodID(cls, "dir_close", "(I)V");
_dir_is_dir = env->GetMethodID(cls, "dir_is_dir", "(I)Z");
//(*env)->CallVoidMethod(env,obj,aMethodID, myvar);
}
DirAccessJAndroid::DirAccessJAndroid() {
id = 0;
}
DirAccessJAndroid::~DirAccessJAndroid() {
list_dir_end();
}