fgets_vs_WriteFile.c

#include <stdio.h>
#include <Windows.h>
#include <tchar.h>

#define MAX_SIZE 1024

TCHAR file_name[] = _T("test");
char buf[MAX_SIZE] = { 0, };

int test_fopen()
{
	DWORD t = GetTickCount();

	FILE * file_read = fopen("test", "rb");
	if (file_read == nullptr)
		return 1;
	FILE * file_write = fopen("cptest1", "wb");
	if (file_write == nullptr)
	{
		fclose(file_read);
		return 1;
	}
	while (fgets(buf, MAX_SIZE, file_read) != NULL)
	{
		
		fwrite(buf, sizeof(char), MAX_SIZE, file_write);
	}

	fclose(file_read);
	fclose(file_write);

	printf("fopen : %d\n", GetTickCount() - t);
	return 0;
}

int test_create_file()
{
	DWORD t = GetTickCount();

	HANDLE hread, hwrite;
	DWORD readn, writen;
	BOOL rrtv, wrtv;
	
	hread = CreateFile(file_name, GENERIC_ALL, NULL, NULL, OPEN_EXISTING,
		FILE_ATTRIBUTE_NORMAL, NULL);

	if (hread == INVALID_HANDLE_VALUE)
	{
		printf("%d\n", GetLastError());
		return 1;
	}

	hwrite = CreateFile(_T("cptest2"), GENERIC_ALL, NULL, NULL, 
		CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
	
	if (hwrite == INVALID_HANDLE_VALUE)
	{
		printf("%d\n", GetLastError());
		CloseHandle(hread);
		return 1;
	}

	while (1)
	{
		rrtv = ReadFile(hread, buf, MAX_SIZE, &readn, NULL);
		if (rrtv && readn == 0)
			break;
		wrtv = WriteFile(hwrite, buf, MAX_SIZE, &writen, NULL);
	}

	CloseHandle(hread);
	CloseHandle(hwrite);

	printf("WriteFile : %d\n", GetTickCount() - t);
	return 0;
}

int main()
{
	bool ok = test_fopen();
	if (ok)
	{
		printf("error in test open\n");
	}

	memset(buf, 2, MAX_SIZE);

	ok = test_create_file();
	if (ok)
	{
		printf("error in test open\n");
	}

	return 0;
}