C语言实现银联PBOC3.0 TLV解析算法详解

void ConS(unsigned char *buffer, int len, int count)
{
int currentTLVIndex = 0;
    int currentIndex = 0;
    int currentStatus = 'T'; //状态字符
    unsigned long valueSize = 0;
unsigned char Tag[100][32]; //标记
unsigned char Length[100][32]; //数据长度
unsigned char Value[100][1024*2]; //数据
unsigned int TagSize[100]; //标记占用字节数
unsigned int LengthSize[100]; //数据长度占用字节数

unsigned char Tag1[32];
char inipath[256];

memset(inipath,0,sizeof(inipath));
sprintf(inipath,"%s","C:\\Program Files\\浪潮集团金融事业部\\DevCtrler\\module\\PBOC.ini");

unsigned char Tagstr[32];
unsigned char Lengthstr[32];
unsigned char Valuestr[1024*2];
int status=1;
int ValueLen;
    while(currentIndex < len)
    {
        switch(currentStatus)
        {
        case 'T':
            valueSize = 0;
            //判断是否单一结构

            if((status == 1 && buffer[currentIndex] & 0x20) != 0x20)
            {
               // tlvEntity[currentTLVIndex].Sub_TLVEntity = NULL; //单一结构时将子Tag置空
                //判断是否多字节Tag
                if((buffer[currentIndex] & 0x1f) == 0x1f)
                {
                    int endTagIndex = currentIndex;
                    while((buffer[++endTagIndex] & 0x80) == 0x80); //判断第二个字节的最高位是否为1
                    int tagSize = endTagIndex - currentIndex + 1; //计算Tag包含多少字节
 
                    memset(Tag[currentTLVIndex],0,sizeof(Tag[currentTLVIndex]));
                    memcpy(Tag[currentTLVIndex], buffer + currentIndex, tagSize); 
                    Tag[currentTLVIndex][tagSize] = 0;
 
                    TagSize[currentTLVIndex] = tagSize;
 
                    currentIndex += tagSize;
                }
                else
                {
   memset(Tag[currentTLVIndex],0,sizeof(Tag[currentTLVIndex]));
                  // Tag = new unsigned char[1];
                   memcpy(Tag[currentTLVIndex], buffer + currentIndex, 1);
                   Tag[currentTLVIndex][1] = 0;
 
                   TagSize[currentTLVIndex] = 1;
 
                    currentIndex += 1;
                }
            }