我正在转换C api> Java,并且具有以下函数原型。
/* Retrieves an individual field value from the current Line \param reader pointer to Text Reader object. \param field_num relative field [aka column] index: first field has index 0. \param type on completion this variable will contain the value type. \param value on completion this variable will contain the current field value. \return 0 on failure: any other value on success. */ extern int gaiaTextReaderFetchField (gaiaTextReaderPtr reader, int field_num, int *type, const char **value);
我想按预期返回状态,以整数形式返回“类型”,以字符串形式返回“值”(不被释放)
从文档中,我发现您创建了两个可以保留返回值的结构。
有人可以帮我做第一个吗?
假设函数声明存在于一个名为header.h的文件中,则可以执行以下操作:
%module test %{ #include "header.h" %} %inline %{ %immutable; struct FieldFetch { int status; int type; char *value; }; %mutable; struct FieldFetch gaiaTextReaderFetchField(gaiaTextReaderPtr reader, int field_num) { struct FieldFetch result; result.status = gaiaTextReaderFetchField(reader, field_num, &result.type, &result.value); return result; } %} %ignore gaiaTextReaderFetchField; %include "header.h"
这将隐藏“实数” gaiaTextReaderFetchField,而是替换为在(不可修改的)结构中返回输出参数和调用结果的版本。
gaiaTextReaderFetchField
(如果愿意,可以将返回状态设置为0导致引发异常,而%javaexception不是将其放置在结构中)
%javaexception