小编use*_*578的帖子

我正在编写一个套接字程序来下载图像.问题是,当我在像gif这样的小图片上测试我的代码时,它运行正常.但是当我使用JPG图片(大于GIF)运行它时,我收到了错误消息:

*** glibc detected *** /home/ubuntu/NetBeansProjects/myDownloader/dist/Debug/GNU-Linux-x86/mydownloader: free(): invalid next size (normal): 0x0a03c978 ***

请查看代码,我将提供有关错误的更多信息.

FILE* pFile;
long lSize;
unsigned char* buffer;
size_t result;
FILE* combinedFile = fopen("mypic.jpg", "wb+");

for(i = 1; i <= numberOfPartitions; i++)
{
    sprintf(filename, "part%d", i);
    pFile = fopen(filename, "rb");

    //obtain file size
    fseek(pFile , 0 , SEEK_END);
    lSize = ftell(pFile);
    rewind(pFile);

    // allocate memory to contain the whole file:
    buffer = (unsigned char*) malloc(sizeof(unsigned char) * (lSize + 1));

    if(buffer == NULL)
    {
        fputs("Memory error", stderr); …