在Python中使用ctypes訪問c_char_p_Array_256

我有一個本地python橋到一些C代碼，它返回一個指向數組（結構數組）的指針。該結構包含一些字符數組（字符串）。但是我怎樣才能從c_char_p_Array_NNN得到一個真正的Python字符串？在Python中使用ctypes訪問c_char_p_Array_256

typedef struct td_Group 
{ 
    unsigned int group_id; 
    char groupname[256]; 
    char date_created[32]; 
    char date_modified[32]; 
    unsigned int user_modified; 
    unsigned int user_created; 
} Group; 

int getGroups(LIBmanager *, Group **); 

############# python code below: 
class Group(Structure): 
    _fields_ = [("group_id", c_uint), 
       ("groupname", c_char_p*256), 
       ("date_created", c_char_p*32), 
       ("date_modified", c_char_p*32), 
       ("user_modified", c_uint), 
       ("user_created", c_uint)] 


def somefunc(): 
    myGroups = c_void_p() 
    count = libnativetest.getGroups(nativePointer, byref(myGroups)) 
    print "got " + str(count) + " groups!!" 
    myCastedGroups = cast(myGroups, POINTER(Group*count)) 
    for x in range(0,count): 
     theGroup = cast(myCastedGroups[x], POINTER(Group)) 
     theGroupName = theGroup.contents.groupname 
     ### Now how do I access theGroupName as a python string? 
     # it is a c_char_p_Array_256 presently

來源

2011-11-29 sadris

的類型應該是c_char*256，不c_char_p*256，因爲它是一個char[256]，而不是一個char *[256]。

string_at (theGroupName, sizeof(theGroupName))

來源

2011-11-29 16:56:59 ephemient

在Python中使用ctypes訪問c_char_p_Array_256

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