絶対パス変換して出力

fullpath.c

#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>
#include <cassert>

enum { FIELD_WIDTH = 17 };

int print_fullpath(char *source_path);
int print_getfullpathname(char *source_path);
void print_result(char *function_name, char *full_path);
void print_error(char *function_name, DWORD error_number);
void test(void);

int main(int argc, char *argv[])
{
	char *source_path;
	char return_code = 0;

	//test();

	if(argc == 1){
		printf("Usage: fullpath source_path\n");
		return 1;
	}

	source_path = argv[1];
	print_result("Source path", source_path);

	return_code |= print_fullpath(source_path);
	return_code |= print_getfullpathname(source_path);

	return return_code;
}

int print_fullpath(char *source_path)
{
	char full_path[_MAX_PATH];
	char *is_fullpath;

	is_fullpath = _fullpath(full_path, source_path, _MAX_PATH);
	if(is_fullpath == NULL){
		print_error("_fullpath()", errno);
		return 1;
	}
	print_result("_fullpath()", full_path);

	return 0;
}

int print_getfullpathname(char *source_path)
{
	char full_path[_MAX_PATH];
	DWORD path_length;

	path_length = GetFullPathName(source_path, _MAX_PATH, full_path, NULL);
	if(path_length == 0){
		errno = GetLastError();
		print_error("GetFullPathName()", errno);
		return 1;
	}
	print_result("GetFullPathName()", full_path);

	return 0;
}

void print_result(char *function_name, char *full_path)
{
	printf("%*s = \"%s\"\n", FIELD_WIDTH, function_name, full_path);
}

void print_error(char *function_name, DWORD error_number)
{
	printf("%*s error, errno= \"%ld\"\n", FIELD_WIDTH, function_name, error_number);
}

void test(void)
{
	assert(print_fullpath("D:") == 0);
	assert(print_fullpath("\\") == 0);
	assert(print_fullpath(".") == 0);
	assert(print_fullpath("text.txt") == 0);
	assert(print_fullpath("\\text.txt") == 0);
	assert(print_fullpath("D:\\dir\\..\\text.txt") == 0);
	assert(print_fullpath("D:\\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") == 1);

	assert(print_getfullpathname("D:") == 0);
	assert(print_getfullpathname("\\") == 0);
	assert(print_getfullpathname(".") == 0);
	assert(print_getfullpathname("text.txt") == 0);
	assert(print_getfullpathname("\\text.txt") == 0);
	assert(print_getfullpathname("D:\\dir\\..\\text.txt") == 0);
	assert(print_getfullpathname("D:\\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\ \
	                                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") == 1);
}