ctp交易平台转java接口转换

时间：2022-04-21 16:29:46
首先感谢倪材@csdn的博客，给了我很大帮助。

http://blog.csdn.net/pjjing/article/details/53186394

http://blog.csdn.net/pjjing/article/details/53187469

这里着重说一下转换中遇到的问题。

首先swig中转换 char *str[] 和char **时会转换成SWIGTYPE_p_p_char类型，这里需要在编写.i文件之前，先编写various.i文件，内容如下

/* -----------------------------------------------------------------------------

 * See the LICENSE file for information on copyright, usage and redistribution

 * of SWIG, and the README file for authors - http://www.swig.org/release.html.

 *

 * various.i

 *

 * SWIG Typemap library for Java.

 * Various useful typemaps.

 * ----------------------------------------------------------------------------- */

/*

 * char **STRING_ARRAY typemaps.

 * These typemaps are for C String arrays which are NULL terminated.

 *   char *values[] = { "one", "two", "three", NULL }; // note NULL

 * char ** is mapped to a Java String[].

 *

 * Example usage wrapping:

 *   %apply char **STRING_ARRAY { char **input };

 *   char ** foo(char **input);

 *

 * Java usage:

 *   String numbers[] = { "one", "two", "three" };

 *   String[] ret = modulename.foo( numbers };

 */

%typemap(jni) char **STRING_ARRAY "jobjectArray"

%typemap(jtype) char **STRING_ARRAY "String[]"

%typemap(jstype) char **STRING_ARRAY "String[]"

%typemap(in) char **STRING_ARRAY (jint size) {

    int i = ;

    size = JCALL1(GetArrayLength, jenv, $input);

#ifdef __cplusplus

    $ = new char*[size+];

#else

    $ = (char **)calloc(size+, sizeof(char *));

#endif

    for (i = ; i<size; i++) {

        jstring j_string = (jstring)JCALL2(GetObjectArrayElement, jenv, $input, i);

        const char *c_string = JCALL2(GetStringUTFChars, jenv, j_string, );

#ifdef __cplusplus

        $[i] = new char [strlen(c_string)+];

#else

        $[i] = (char *)calloc(strlen(c_string)+, sizeof(const char *));

#endif

        strcpy($[i], c_string);

        JCALL2(ReleaseStringUTFChars, jenv, j_string, c_string);

        JCALL1(DeleteLocalRef, jenv, j_string);

    }

    $[i] = ;

}

%typemap(freearg) char **STRING_ARRAY {

    int i;

    for (i=; i<size$argnum-; i++)

#ifdef __cplusplus

      delete[] $[i];

    delete[] $;

#else

      free($[i]);

    free($);

#endif

}

%typemap(out) char **STRING_ARRAY {

    int i;

    int len=;

    jstring temp_string;

    const jclass clazz = JCALL1(FindClass, jenv, "java/lang/String");

    while ($[len]) len++;

    jresult = JCALL3(NewObjectArray, jenv, len, clazz, NULL);

    /* exception checking omitted */

    for (i=; i<len; i++) {

      temp_string = JCALL1(NewStringUTF, jenv, *result++);

      JCALL3(SetObjectArrayElement, jenv, jresult, i, temp_string);

      JCALL1(DeleteLocalRef, jenv, temp_string);

    }

}

%typemap(javain) char **STRING_ARRAY "$javainput"

%typemap(javaout) char **STRING_ARRAY  {

    return $jnicall;

  }

/*

 * char **STRING_OUT typemaps.

 * These are typemaps for returning strings when using a C char ** parameter type.

 * The returned string appears in the 1st element of the passed in Java String array.

 *

 * Example usage wrapping:

 *   void foo(char **string_out);

 *

 * Java usage:

 *   String stringOutArray[] = { "" };

 *   modulename.foo(stringOutArray);

 *   System.out.println( stringOutArray[0] );

 */

%typemap(jni) char **STRING_OUT "jobjectArray"

%typemap(jtype) char **STRING_OUT "String[]"

%typemap(jstype) char **STRING_OUT "String[]"

%typemap(javain) char **STRING_OUT "$javainput"

%typemap(in) char **STRING_OUT($*1_ltype temp) {

  if (!$input) {

    SWIG_JavaThrowException(jenv, SWIG_JavaNullPointerException, "array null");

    return $null;

  }

  if (JCALL1(GetArrayLength, jenv, $input) == ) {

    SWIG_JavaThrowException(jenv, SWIG_JavaIndexOutOfBoundsException, "Array must contain at least 1 element");

    return $null;

  }

  $ = &temp;

}

%typemap(argout) char **STRING_OUT {

  jstring jnewstring = NULL;

  if($) {

     jnewstring = JCALL1(NewStringUTF, jenv, *$);

  }

  JCALL3(SetObjectArrayElement, jenv, $input, , jnewstring);

}

/*

 * char *BYTE typemaps.

 * These are input typemaps for mapping a Java byte[] array to a C char array.

 * Note that as a Java array is used and thus passeed by reference, the C routine

 * can return data to Java via the parameter.

 *

 * Example usage wrapping:

 *   void foo(char *array);

 *

 * Java usage:

 *   byte b[] = new byte[20];

 *   modulename.foo(b);

 */

%typemap(jni) char *BYTE "jbyteArray"

%typemap(jtype) char *BYTE "byte[]"

%typemap(jstype) char *BYTE "byte[]"

%typemap(in) char *BYTE {

    $ = (char *) JCALL2(GetByteArrayElements, jenv, $input, );

}

%typemap(argout) char *BYTE {

    JCALL3(ReleaseByteArrayElements, jenv, $input, (jbyte *) $, );

}

%typemap(javain) char *BYTE "$javainput"

/* Prevent default freearg typemap from being used */

%typemap(freearg) char *BYTE ""

然后将various.i引入自己编写的.i文件：

%module(directors="") thosttradeapi

%include "various.i"

%apply char **STRING_ARRAY { char *ppInstrumentID[] }

%{

#include "ThostFtdcTraderApi.h"

#include "ThostFtdcMdApi.h"

%}

%feature("director") CThostFtdcTraderSpi;

%include "ThostFtdcUserApiDataType.h"

%include "ThostFtdcUserApiStruct.h"

%include "ThostFtdcTraderApi.h"

%feature("director") CThostFtdcMdSpi;

%include "ThostFtdcMdApi.h"

中文乱码的问题，按照博客上所述的，需要把thosttraderapi_wrap.cpp中所有的带有中文的方法替换，可以用newStringUTF快速定位，替换完之后make，makefile如下

OBJS=thosttraderapi_wrap.o

INCLUDE=-I./ -I/home/user/jdk/include -I/home/user/jdk/include/linux

TARGET=libthosttraderapi_wrap.so

CPPFLAG=-shared -fPIC

CC=g++

LDLIB=-liconv -L.-Lthosttraderapi

$(TARGET) : $(OBJS)

$(CC) $(CPPFLAG) $(INCLUDE) -o $(TARGET) $(OBJS) $(LDLIB)

$(OBJS) : %.o : %.cpp

$(CC) -c -fPIC $(INCLUDE) $< -o $@

clean:

      -rm -f $(OBJS)

 　　　-rm -f $(TARGET)

install:

 　　　cp $(TARGET) /usr/lib

　make之后直接load libthosttradeapi_wrap.so，中文乱码的问题就解决了。

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