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godot/drivers/unix/file_access_unix.cpp
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

269 lines
6.3 KiB
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/*************************************************************************/
/* file_access_unix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* 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.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "file_access_unix.h"
#if defined(UNIX_ENABLED) || defined(LIBC_FILEIO_ENABLED)
#include <sys/types.h>
#include <sys/stat.h>
#include "print_string.h"
#include "core/os/os.h"
#ifndef ANDROID_ENABLED
#include <sys/statvfs.h>
#endif
#ifdef MSVC
#define S_ISREG(m) ((m)&_S_IFREG)
#endif
#ifndef S_ISREG
#define S_ISREG(m) ((m) & S_IFREG)
#endif
void FileAccessUnix::check_errors() const {
ERR_FAIL_COND(!f);
if (feof(f)) {
last_error=ERR_FILE_EOF;
}
}
Error FileAccessUnix::_open(const String& p_path, int p_mode_flags) {
if (f)
fclose(f);
f=NULL;
path=fix_path(p_path);
//printf("opening %ls, %i\n", path.c_str(), Memory::get_static_mem_usage());
ERR_FAIL_COND_V(f,ERR_ALREADY_IN_USE);
const char* mode_string;
if (p_mode_flags==READ)
mode_string="rb";
else if (p_mode_flags==WRITE)
mode_string="wb";
else if (p_mode_flags==READ_WRITE)
mode_string="rb+";
else if (p_mode_flags==WRITE_READ)
mode_string="wb+";
else
return ERR_INVALID_PARAMETER;
/* pretty much every implementation that uses fopen as primary
backend (unix-compatible mostly) supports utf8 encoding */
//printf("opening %s as %s\n", p_path.utf8().get_data(), path.utf8().get_data());
struct stat st;
if (stat(path.utf8().get_data(),&st) == 0) {
if (!S_ISREG(st.st_mode))
return ERR_FILE_CANT_OPEN;
};
if (is_backup_save_enabled() && p_mode_flags&WRITE && !(p_mode_flags&READ)) {
save_path=path;
path=path+".tmp";
//print_line("saving instead to "+path);
}
f=fopen(path.utf8().get_data(),mode_string);
if (f==NULL) {
last_error=ERR_FILE_CANT_OPEN;
return ERR_FILE_CANT_OPEN;
} else {
last_error=OK;
flags=p_mode_flags;
return OK;
}
}
void FileAccessUnix::close() {
if (!f)
return;
fclose(f);
f = NULL;
if (close_notification_func) {
close_notification_func(path,flags);
}
if (save_path!="") {
//unlink(save_path.utf8().get_data());
//print_line("renaming..");
int rename_error = rename((save_path+".tmp").utf8().get_data(),save_path.utf8().get_data());
if (rename_error && close_fail_notify) {
close_fail_notify(save_path);
}
save_path="";
ERR_FAIL_COND( rename_error != 0);
}
}
bool FileAccessUnix::is_open() const{
return (f!=NULL);
}
void FileAccessUnix::seek(size_t p_position) {
ERR_FAIL_COND(!f);
last_error=OK;
if ( fseek(f,p_position,SEEK_SET) )
check_errors();
}
void FileAccessUnix::seek_end(int64_t p_position) {
ERR_FAIL_COND(!f);
if ( fseek(f,p_position,SEEK_END) )
check_errors();
}
size_t FileAccessUnix::get_pos() const{
size_t aux_position=0;
if ( !(aux_position = ftell(f)) ) {
check_errors();
};
return aux_position;
}
size_t FileAccessUnix::get_len() const{
ERR_FAIL_COND_V(!f,0);
FileAccessUnix *fau = const_cast<FileAccessUnix*>(this);
int pos = fau->get_pos();
fau->seek_end();
int size = fau->get_pos();
fau->seek(pos);
return size;
}
bool FileAccessUnix::eof_reached() const{
return last_error==ERR_FILE_EOF;
}
uint8_t FileAccessUnix::get_8() const{
ERR_FAIL_COND_V(!f,0);
uint8_t b;
if (fread(&b,1,1,f) == 0) {
check_errors();
};
return b;
}
int FileAccessUnix::get_buffer(uint8_t *p_dst, int p_length) const {
ERR_FAIL_COND_V(!f,-1);
int read = fread(p_dst, 1, p_length, f);
check_errors();
return read;
};
Error FileAccessUnix::get_error() const{
return last_error;
}
void FileAccessUnix::store_8(uint8_t p_dest) {
ERR_FAIL_COND(!f);
fwrite(&p_dest,1,1,f);
}
bool FileAccessUnix::file_exists(const String &p_path) {
FILE *g;
//printf("opening file %s\n", p_fname.c_str());
String filename=fix_path(p_path);
g=fopen(filename.utf8().get_data(),"rb");
if (g==NULL) {
return false;
} else {
fclose(g);
return true;
}
}
uint64_t FileAccessUnix::_get_modified_time(const String &p_file) {
String file=fix_path(p_file);
struct stat flags;
bool success = (stat(file.utf8().get_data(),&flags)==0);
if (success) {
return flags.st_mtime;
} else {
print_line("ERROR IN: "+p_file);
ERR_FAIL_V(0);
};
}
FileAccess * FileAccessUnix::create_libc() {
return memnew( FileAccessUnix );
}
CloseNotificationFunc FileAccessUnix::close_notification_func=NULL;
FileAccessUnix::FileAccessUnix() {
f=NULL;
flags=0;
last_error=OK;
}
FileAccessUnix::~FileAccessUnix() {
close();
}
#endif
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