DLBmpManager.cpp
1.75 KB
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#include "stdafx.h"
#include <iostream>
#include <windows.h>
#include "DLBmpManager.h"
#include "string_converter.h"
#include <fstream>
string CDLBmpManager::Encode(const char* Data, int DataByte)
{
//编码表
const char EncodeTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
//返回值
string strEncode;
unsigned char Tmp[4] = { 0 };
int LineLength = 0;
for (int i = 0; i < (int)(DataByte / 3); i++)
{
Tmp[1] = *Data++;
Tmp[2] = *Data++;
Tmp[3] = *Data++;
strEncode += EncodeTable[Tmp[1] >> 2];
strEncode += EncodeTable[((Tmp[1] << 4) | (Tmp[2] >> 4)) & 0x3F];
strEncode += EncodeTable[((Tmp[2] << 2) | (Tmp[3] >> 6)) & 0x3F];
strEncode += EncodeTable[Tmp[3] & 0x3F];
//if (LineLength += 4, LineLength == 76) { strEncode += "\r\n"; LineLength = 0; }
}
//对剩余数据进行编码
int Mod = DataByte % 3;
if (Mod == 1)
{
Tmp[1] = *Data++;
strEncode += EncodeTable[(Tmp[1] & 0xFC) >> 2];
strEncode += EncodeTable[((Tmp[1] & 0x03) << 4)];
strEncode += "==";
}
else if (Mod == 2)
{
Tmp[1] = *Data++;
Tmp[2] = *Data++;
strEncode += EncodeTable[(Tmp[1] & 0xFC) >> 2];
strEncode += EncodeTable[((Tmp[1] & 0x03) << 4) | ((Tmp[2] & 0xF0) >> 4)];
strEncode += EncodeTable[((Tmp[2] & 0x0F) << 2)];
strEncode += "=";
}
return strEncode;
}
string CDLBmpManager::ReadBmp(const char* pBmpName)
{
string sBmp;
FILE* pFile = NULL;
int iSize = 0;
do
{
pFile = fopen(pBmpName, "r");
if (pFile)
{
fseek(pFile, 0L, SEEK_END);
iSize = ftell(pFile);
fclose(pFile);
}
else
{
break;
}
std::ifstream fBmp(pBmpName, std::ios::binary);
char* pBuff = new char[iSize];
fBmp.read(pBuff, sizeof(char) * iSize);
fBmp.close();
string sBmp = Encode(pBuff, iSize);
} while (0);
return sBmp;
}