[游戏开发]文件拷贝工具

为了便于测试透明解密的效果，写了一个文件拷贝工具，把文件从a拷贝到b位置。

//#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <malloc.h>

#define TMP_BLOCK_SIZE 1024
int main(int argc, char **argv)
{
	FILE * fp_input = NULL;
	FILE * fp_output = NULL;

	char * inputname = argv[1];
	char * outputname = argv[2];

	char * tmp_buff = NULL;

	int input_file_size = 0;
	int curr_offset = 0;
	size_t i = 0;
	int ret = 0;

	tmp_buff = (char*)malloc(sizeof(char)*TMP_BLOCK_SIZE);

	ret = fopen_s(&fp_input,inputname, "rb");
	if (NULL == fp_input)
	{
		return -1;
	}
	ret = fopen_s(&fp_output,outputname, "wb");
	if (NULL == fp_output)
	{
		return -1;
	}

	_fseeki64(fp_input, 0, SEEK_END);

	input_file_size = _ftelli64(fp_input);
	if (0 == input_file_size)
	{
		// 文件大小为0
		return -1;
	}

	
	do
	{
		fseek(fp_input, curr_offset, SEEK_SET);
		if (input_file_size - curr_offset < TMP_BLOCK_SIZE)
		{
			fread(tmp_buff, 1, input_file_size - curr_offset ,fp_input);
			fwrite(tmp_buff, 1, input_file_size - curr_offset, fp_output);
		}
		else
		{
			fread(tmp_buff, 1, TMP_BLOCK_SIZE, fp_input);
			fwrite(tmp_buff, 1, TMP_BLOCK_SIZE, fp_output);

		}
		curr_offset += TMP_BLOCK_SIZE;

	} while (curr_offset <= input_file_size);

	fclose(fp_input);
	fclose(fp_output);

	if (tmp_buff != NULL)
	{
		free(tmp_buff);
		tmp_buff = NULL;
	}
	return 0;
}

创作挑战赛

新人创作奖励来咯，坚持创作打卡瓜分现金大奖