我在C中有以下结构：
struct wordSynonym
{
wchar_t* word;
char** synonyms;
int numSynonyms;
};
struct wordList
{
wordSynonym* wordSynonyms;
int numWords;
};
而且,我在Python中有以下内容：
class wordSynonym(Structure):
_fields_ = [ ("word",c_wchar_p),("synonyms",POINTER(c_char_p)),# Is this correct?
("numSynonyms",c_int) ];
class WordList(Structure):
_fields_ = [ ("wordSynonyms",POINTER(wordSynonym)),("numWords",c_int)];
在python中引用char **的正确方法是什么？也就是说,在Python代码中,POINTER(c_char_p)是否正确？
最佳答案
我在我的代码中使用它：
POINTER(POINTER(c_char))
但我认为两者都是等价的.
编辑：
实际上他们不是
http://docs.python.org/2/library/ctypes.html#ctypes.c_char_p
ctypes.c_char_p
Represents the C char * datatype when it points to a zero-terminated
string. For a general character pointer that may also point to binary
data,POINTER(c_char) must be used. The constructor accepts an integer
address,or a string.
所以POINTER(POINTER(c_char))用于二进制数据,POINTER(c_char_p)是指向C以null结尾的字符串的指针.