C # C + + Java interface type conversions

Recent days to do a part-time, mainly the C language and C # language encapsulated DLL, after C + + to the Java language Support, the main problem is the type conversion, which lists the common types of conversion process.

1#include"stdafx.h"2#include <cstdlib>3#include <cstdio>4#include <iostream>5#include"Jstring_cstring_char_ptr.h"6#include <malloc.h>7#include <Windows.h>8 9 using namespacestd;Ten using namespacesystem::runtime::interopservices; One using namespaceSystem; A  - //char*->c# -system::string^ charptrtocstring (Const Char*str) the { -system::string^ str1 = Marshal::P trtostringansi ((INTPTR) (Char*) str); -     returnstr1; - } +  -  + //c#->char* A Char* CSTRINGTOCHARPTR (system::string^s) at { -     Char* Buffer = (Char*)(void*) Marshal::stringtohglobalansi (s); -     returnbuffer; - } -  -  in //jstring->char* - Char* JSTRINGTOCHARPTR (JNIENV *env, jstring jstr) to{//utf8/16 conversion into gb2312 +     intLength = (env)getstringlength (JSTR); -     Constjchar* jcstr = (env)->getstringchars (JSTR,0 ); the     Char* Rtn = (Char*)malloc(length*2+1 ); *     intSize =0; $Size = WideCharToMultiByte (CP_ACP,0, (LPCWSTR) jcstr, Length, RTN, (length*2+1), NULL, NULL);Panax Notoginseng     if(Size <=0 ) -         returnNULL; the(ENV)Releasestringchars (Jstr, jcstr); +Rtn[size] =0; A     returnRtn; the } +  - //char*->jstring $Jstring charptrtojstring (jnienv* env,Const Char*str) ${//gb2312 conversion into UTF8/16 -Jstring RTN =0; -     intSlen =strlen (str); theUnsigned Short* Buffer =0; -     if(Slen = =0 )WuyiRTN = (env)Newstringutf (str); the     Else -     { Wu         intLength = MultiByteToWideChar (CP_ACP,0, (LPCSTR) str, slen, NULL,0 ); -Buffer = (unsigned Short*)malloc(length*2+1 ); About         if(MultiByteToWideChar (CP_ACP,0, (LPCSTR) str, Slen, (LPWSTR) buffer, length) >0 ) $RTN = (env)->newstring (jchar*) buffer, length); -     } -     if(buffer) -          Free(buffer); A     returnRtn; + } the  - //Jchar->char $ CharJchartochar (Jchar c) the { the     CharCH = (Char) (C &0x00ff); the     returnch; the } -  in //char*->jchar theJchar Chartojchar (Charc) the { AboutJchar ch = (Jchar) (c |0xff00); the     returnch; the } the  + //Char->c# -System::char Chartochar (Charc) the {BayiSystem::char C = (System::char) ((int) (c)); the     returnC; the } -  - //C#->char the CharChartochar (System::char c) the { the     CharC = (Char)((int) (c)); the     returnC; -}

C # C + + Java interface type conversions