SWIG無符號字符和字節[]

Question

我看遍了所有的地方。我曾嘗試過這個網站的一些技巧。無濟於事。

我有一個C++全局函數

char* squid(char* buff, int len); 

我創建了一個.i文件

%module Crabby 

%include "arrays_java.i" 

%{ 
/* headers here are included in the wrapper code */ 
#include "sponge.h" 
%} 



%typemap(jtype) (const signed char *arr, size_t sz) "byte[]" 
%typemap(jstype) (const signed char *arr, size_t sz) "byte[]" 
%typemap(jni) (const signed char *arr, size_t sz) "jbyteArray" 
%typemap(javain) (const signed char *arr, size_t sz) "$javainput" 

%typemap(in) (const signed char* arr, size_t sz) { 
    $1 = JCALL2(GetByteArrayElements, jenv, $input, NULL); 
    const size_t sz = JCALL1(GetArrayLength, jenv, $input); 
    $2 = $1 + sz; 
} 

%typemap(freearg) (const signed char *arr, size_t sz) { 
    // Or use 0 instead of ABORT to keep changes if it was a copy 
    JCALL3(ReleaseByteArrayElements, jenv, $input, $1, JNI_ABORT); 
} 

%apply (const signed char* arr, size_t sz) { (const unsigned char* buff, int len) } 
%apply (const signed char* arr, size_t sz) { (const unsigned char* query, int queryLen) } 

%include "sponge.h" 

不管我做什麼的界面總是

public static String Squid(String buff, int len) 

如果刪除無符號的我在cxx包裝中得到非法轉換

這是痛飲2.0.1

Answer 1

你的界面接近，但有以下問題：爲%apply

您需要的符號/無符號限定詞精確匹配爲buff

1. const事項（有在你展示的聲明中沒有限定詞。
2. 你在類型映射需要numinputs=1壓縮它只有一個Java輸入。
3. 將大小設置爲計算指針沒有多大意義。

所以固定接口的樣子：

%module Crabby 

%include "arrays_java.i" 

%{ 
/* headers here are included in the wrapper code */ 
#include "sponge.h" 
%} 

%typemap(jtype) (const signed char *arr, size_t sz) "byte[]" 
%typemap(jstype) (const signed char *arr, size_t sz) "byte[]" 
%typemap(jni) (const signed char *arr, size_t sz) "jbyteArray" 
%typemap(javain) (const signed char *arr, size_t sz) "$javainput" 

%typemap(in,numinputs=1) (const signed char* arr, size_t sz) { 
    $1 = JCALL2(GetByteArrayElements, jenv, $input, NULL); 
    const size_t sz = JCALL1(GetArrayLength, jenv, $input); 
    $2 = sz; 
} 

%typemap(freearg) (const signed char *arr, size_t sz) { 
    // Or use 0 instead of ABORT to keep changes if it was a copy 
    JCALL3(ReleaseByteArrayElements, jenv, $input, $1, JNI_ABORT); 
} 

%apply (const signed char* arr, size_t sz) { (char* buff, int len) } 

%include "sponge.h"