我有一個函數,我調用它一直運行到它應該返回但不返回的位置。如果我在函數的最後調出一些用於調試的東西,它會顯示出來,但函數不會返回。C++函數不會返回
fetchData是我所指的功能。它被outputFile調用。 cout顯示「在這裏完成」,但不是「數據提取」
我知道這段代碼很混亂,但任何人都可以幫我弄清楚這一點嗎?
感謝
//Given an inode return all data of i_block data
char* fetchData(iNode tempInode){
char* data;
data = new char[tempInode.i_size];
this->currentInodeSize = tempInode.i_size;
//Loop through blocks to retrieve data
vector<unsigned int> i_blocks;
i_blocks.reserve(tempInode.i_blocks);
this->currentDataPosition = 0;
cout << "currentDataPosition set to 0" << std::endl;
cout << "i_blocks:" << tempInode.i_blocks << std::endl;
int i = 0;
for(i = 0; i < 12; i++){
if(tempInode.i_block[i] == 0)
break;
i_blocks.push_back(tempInode.i_block[i]);
}
appendIndirectData(tempInode.i_block[12], &i_blocks);
appendDoubleIndirectData(tempInode.i_block[13], &i_blocks);
appendTripleIndirectData(tempInode.i_block[14], &i_blocks);
//Loop through all the block addresses to get the actual data
for(i=0; i < i_blocks.size(); i++){
appendData(i_blocks[i], data);
}
cout << "done here" << std::endl;
return data;
}
void appendData(int block, char* data){
char* tempBuffer;
tempBuffer = new char[this->blockSize];
ifstream file (this->filename, std::ios::binary);
int entryLocation = block*this->blockSize;
file.seekg (entryLocation, ios::beg);
file.read(tempBuffer, this->blockSize);
//Append this block to data
for(int i=0; i < this->blockSize; i++){
data[this->currentDataPosition] = tempBuffer[i];
this->currentDataPosition++;
}
data[this->currentDataPosition] = '\0';
}
void outputFile(iNode file, string filename){
char* data;
cout << "File Transfer Started" << std::endl;
data = this->fetchData(file);
cout << "data fetched" << std::endl;
char *outputFile = (char*)filename.c_str();
ofstream myfile;
myfile.open (outputFile,ios::out|ios::binary);
int i = 0;
for(i=0; i < file.i_size; i++){
myfile << data[i];
}
myfile.close();
cout << "File Transfer Completed" << std::endl;
return;
}
你在做什麼叫「printf'調試」,通常不推薦。你將需要使用一個實際的調試器。 此外,請縮減每個選項卡級別的多個空間。這是不可能讀的...... – rlbond 2010-05-01 16:33:28
@rlbond幾乎所有的調試我都是「printf調試」 - 這種做法絕對沒有錯。 – 2010-05-01 16:34:58
Printf調試非常適用於確定常見的故障領域,但有關詳細信息,調試器可以提供更多幫助。 – ssube 2010-05-01 16:39:35