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godot/drivers/unix/file_access_unix.cpp

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/*************************************************************************/
/* file_access_unix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2016 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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