windows下wchar_t* 转char*

这个在windows下很常见,常用，留个档。

一般用这个函数：

size_t wcstombs(
   char *mbstr,
   const wchar_t *wcstr,
   size_t count 
);

mbstr

The address of a sequence of multibyte characters.

wcstr

The address of a sequence of wide characters.

count

The maximum number of bytes that can be stored in the multibyte output string.

locale

The locale to use.

下面是我写的一个测试,是根据项目改过来的：

#include <windows.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <boost/filesystem.hpp>

namespace bfs = boost::filesystem;


bool get_path(char *file_name,size_t size){


char ownPth[MAX_PATH];

HMODULE hModule = GetModuleHandle(NULL);    // Will contain exe path，When passing NULL to GetModuleHandle, it returns handle of exe itself
if (hModule != NULL)
{
GetModuleFileNameA(hModule,ownPth, MAX_PATH);    // 
}
else
ownPth[0]=0;

bfs::path iic_file(ownPth);
iic_file = iic_file.parent_path() / "dlp_usb.iic" ; //For releaseing

if( !bfs::is_regular_file(iic_file))
{
printf("
Error,open 68013 iic file fail
");
return false ;
}


wcstombs(file_name,iic_file.c_str(),size);

//memcpy(file_name,iic_file.c_str(),byte_count);

return true;

}

int main(){

char iic_file[512];

if(get_path( iic_file,512)){

printf("TRUE
");
}

return 0;
}

references:

http://msdn.microsoft.com/en-us/library/5d7tc9zw.aspx

http://blog.163.com/tianshi_17th/blog/static/4856418920085209414977/