C++相对路径转换为绝对路径和linux、window移植api

时间:2022-11-27 11:43:02
#include <stdio.h>
#include <direct.h>
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#ifdef _WIN32
#include <windows.h>
#include <direct.h>
#include <io.h>
#else
#include<unistd.h>
#endif
#include <iostream>
using namespace std;

/**
linux和window移植api
头文件, 函数的不同,可以用如下宏,预处理:
#ifdef WIN32
// windows handle
#elif __linux__
// linux handle
#else
// others handle
#endif
如果两个函数参数和返回值都相同时,如在windows下没有sleep,会使用宏里面定义的Sleep。
在linux下由于定义了sleep这样就不会用到这个宏了,它会调用linux下的sleep函数。
#ifndef sleep
#define sleep(seconds) (Sleep((seconds)*1000))
#endif


windows 替代 linux
localtime_s localtime_r
inet_addr inet_pton
GetTickCount GetTickCount
Sleep毫秒 sleep秒
_mkdir mkdir
memset bzero
_fullpath realpath

*/
//C++相对路径转换为绝对路径和linux、window移植api
//http://blog.csdn.net/tujiaw/article/details/7871547
int main()
{
char* buffer;
if( (buffer = _getcwd( NULL, 0 )) == NULL ) {
perror( "_getcwd error" );
} else {
printf( "Current Dir: %s\n", buffer);
//free(buffer);
}
char currentdir[1024]={0},dir[1024]={0};
sprintf(currentdir,"%s/../../dir/test/",buffer);
printf("%s\n", currentdir);
#ifdef _WIN32
_fullpath(dir,currentdir,1024);
#else
realpath(currentdir,dir);
#endif
printf("dir=%s\n", dir);

char resolved_path[1024];
#ifdef _WIN32
_fullpath(resolved_path,"/usr/X11R6/lib/modules/../../include/../",1024);
#else
realpath("/usr/X11R6/lib/modules/../../include/../",resolved_path);
#endif
printf("resolved_path: %s\n", resolved_path);
return 0;

}

 string abs_path(string path) { #ifdef _WIN32      #define max_path 4096      char resolved_path[max_path]={0};     _fullpath(resolved_path,path.c_str(),max_path); #else     //linux release有个坑,需要大点的空间     #define max_path 40960     char resolved_path[max_path]={0};     realpath(path.c_str(),resolved_path); #endif     return string(resolved_path); }