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2026-06-18

Base64解码 - Base64Decode ​

函数简介 ​

对Base64编码的字符串进行解码。

接口名称 ​

Base64Decode

DLL调用 ​

c
long Base64Decode(long instance, string source);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
source字符串Base64编码的字符串。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
string decoded = ola.Base64Decode("aGVsbG8gb2xh");
csharp
using OLAPlug;

var ola = new OLAPlugServer();
string decoded = ola.Base64Decode("aGVsbG8gb2xh");
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
decoded = ola.Base64Decode("aGVsbG8gb2xh")
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
String decoded = ola.Base64Decode("aGVsbG8gb2xh");
cpp
var ola = com("OlaPlug.OlaSoft")
var decoded = ola.Base64Decode("aGVsbG8gb2xh")
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
decoded = ola.Base64Decode("aGVsbG8gb2xh")
text
.局部变量 ola, OLAPlug
ola.创建 ()
decoded ＝ ola.Base64Decode("aGVsbG8gb2xh")
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var decoded = ola.Base64Decode("aGVsbG8gb2xh");
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
文本型 decoded = ola.Base64Decode("aGVsbG8gb2xh")
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
std::string decoded = ola.Base64Decode("aGVsbG8gb2xh");

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long ptr = Base64Decode(instance, "aGVsbG8gb2xh");
if (ptr != 0) {
    char buffer[4096] = {0};
    GetStringFromPtr(ptr, buffer, sizeof(buffer));
    FreeStringPtr(ptr);
}
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int GetStringFromPtr(long ptr, StringBuilder lpString, int size);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int FreeStringPtr(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int GetStringSize(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long Base64Decode(long ola, string source);

long instance = CreateCOLAPlugInterFace();
long ptr = Base64Decode(instance, "aGVsbG8gb2xh");
if (ptr != 0) {
    StringBuilder sb = new StringBuilder(GetStringSize(ptr) + 1);
    GetStringFromPtr(ptr, sb, sb.Capacity);
    FreeStringPtr(ptr);
    string decoded = sb.ToString();
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
ptr = ola.Base64Decode(instance, b"aGVsbG8gb2xh")

返回值 ​

返回值说明
非 0成功，返回 解码后的原始数据的字符串指针。
0失败。