#include "PrintBuffer.h"

#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <iostream>

namespace jf {

void PrintBuffer::PrintHex(void* pBuff, unsigned int nLen) {
    if (NULL == pBuff || 0 == nLen) {
        return;
    }

    const int nBytePerLine = 16;
    unsigned char* p = (unsigned char*)pBuff;
    char szHex[3 * nBytePerLine + 1] = {0};

    printf("-----------------begin-------------------\n");
    for (unsigned int i = 0; i < nLen; ++i) {
        int idx = 3 * (i % nBytePerLine);
        if (0 == idx) {
            memset(szHex, 0, sizeof(szHex));
        }
#ifdef WIN32
        sprintf_s(&szHex[idx], 4, "%02x ", p[i]);  // buff长度要多传入1个字节
#else
        snprintf(&szHex[idx], 4, "%02x ", p[i]);  // buff长度要多传入1个字节
#endif

        // 以16个字节为一行，进行打印
        if (0 == ((i + 1) % nBytePerLine)) {
            printf("%s\n", szHex);
        }
    }

    // 打印最后一行未满16个字节的内容
    if (0 != (nLen % nBytePerLine)) {
        printf("%s\n", szHex);
    }

    printf("------------------end-------------------\n");
}

}  // namespace jf
