86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
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/*
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* This is the source code of tgnet library v. 1.0
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* It is licensed under GNU GPL v. 2 or later.
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* You should have received a copy of the license in this archive (see LICENSE).
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*
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* Copyright Nikolai Kudashov, 2015.
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*/
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#include "Config.h"
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#include "ConnectionsManager.h"
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#include "FileLog.h"
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#include "BuffersStorage.h"
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Config::Config(std::string fileName) {
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configPath = ConnectionsManager::getInstance().currentConfigPath + fileName;
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backupPath = configPath + ".bak";
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FILE *backup = fopen(backupPath.c_str(), "rb");
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if (backup != nullptr) {
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remove(configPath.c_str());
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rename(backupPath.c_str(), configPath.c_str());
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fclose(backup);
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}
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}
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NativeByteBuffer *Config::readConfig() {
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NativeByteBuffer *buffer = nullptr;
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FILE *file = fopen(configPath.c_str(), "rb");
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if (file != nullptr) {
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fseek(file, 0, SEEK_END);
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long fileSize = ftell(file);
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fseek(file, 0, SEEK_SET);
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uint32_t size = 0;
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int bytesRead = fread(&size, sizeof(uint32_t), 1, file);
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DEBUG_D("Config(%p, %s) load, size = %u", this, configPath.c_str(), size);
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if (bytesRead > 0 && size > 0 && (int32_t) size < fileSize) {
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buffer = BuffersStorage::getInstance().getFreeBuffer(size);
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if (fread(buffer->bytes(), sizeof(uint8_t), size, file) != size) {
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buffer->reuse();
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buffer = nullptr;
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}
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}
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fclose(file);
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}
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return buffer;
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}
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void Config::writeConfig(NativeByteBuffer *buffer) {
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FILE *file = fopen(configPath.c_str(), "rb");
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FILE *backup = fopen(backupPath.c_str(), "rb");
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bool error = false;
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if (file != nullptr) {
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if (backup == nullptr) {
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fclose(file);
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if (rename(configPath.c_str(), backupPath.c_str()) != 0) {
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DEBUG_E("Config(%p) unable to rename file %s to backup file %s", this, configPath.c_str(), backupPath.c_str());
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error = true;
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}
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} else {
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fclose(file);
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fclose(backup);
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remove(configPath.c_str());
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}
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}
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if (error) {
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return;
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}
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file = fopen(configPath.c_str(), "wb");
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if (file == nullptr) {
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return;
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}
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uint32_t size = buffer->position();
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if (fwrite(&size, sizeof(uint32_t), 1, file) == 1) {
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if (fwrite(buffer->bytes(), sizeof(uint8_t), size, file) != size) {
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error = true;
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}
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} else {
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error = true;
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}
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fclose(file);
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if (error) {
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remove(configPath.c_str());
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} else {
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remove(backupPath.c_str());
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}
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}
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