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//-----------------------------------------------------------------------------
// Name: file_descriptor.cpp
// Developer: Wolfire Games LLC
// Description:
// License: Read below
//-----------------------------------------------------------------------------
//
// Copyright 2022 Wolfire Games LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//-----------------------------------------------------------------------------
#include "file_descriptor.h"
#include <Compat/fileio.h>
#include <Logging/logdata.h>
#include <cstring>
bool DiskFileDescriptor::ReadBytes(void* dst, int num_bytes) {
int elements_read = fread(dst, num_bytes, 1, file_);
if (ferror(file_)) {
perror("File error:");
}
if (feof(file_)) {
LOGE << "End of file" << std::endl;
}
return (elements_read == 1);
}
bool DiskFileDescriptor::WriteBytes(const void* src, int num_bytes) {
return (fwrite(src, num_bytes, 1, file_) == 1);
}
bool DiskFileDescriptor::Open(const std::string& abs_path, const std::string& mode) {
file_ = my_fopen(abs_path.c_str(), mode.c_str());
return (file_ != NULL);
}
bool DiskFileDescriptor::Close() {
int ret = fclose(file_);
file_ = 0;
return ret == 0;
}
int DiskFileDescriptor::GetSize() {
int index = ftell(file_);
fseek(file_, 0, SEEK_END);
int file_size = ftell(file_);
fseek(file_, index, SEEK_SET);
return file_size;
}
DiskFileDescriptor::~DiskFileDescriptor() {
if (file_) {
fclose(file_);
}
}
int DiskFileDescriptor::ReadBytesPartial(void* dst, int num_bytes) {
return fread(dst, 1, num_bytes, file_);
}
bool MemReadFileDescriptor::ReadBytes(void* dst, int num_bytes) {
if (!ptr_) {
return false;
}
if (num_bytes == 0) {
return true;
}
memcpy(dst, (char*)ptr_ + index_, num_bytes);
index_ += num_bytes;
return true; // memcpy performs no error checking
}
bool MemWriteFileDescriptor::WriteBytes(const void* src, int num_bytes) {
if (num_bytes == 0) {
return true;
}
vec_.resize(vec_.size() + num_bytes);
uint8_t* dst = &vec_[vec_.size() - num_bytes];
memcpy(dst, src, num_bytes);
return true; // memcpy performs no error checking
}
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