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[]=;

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

 if( !bfs::is_regular_file(iic_file))
 {
 printf("\r\nError,open 68013 iic file fail\r\n");
 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[];

 if(get_path( iic_file,)){

 printf("TRUE\n");
 }

 return ;
 }

references:

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

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