c++ - zlib gzread函数读取.gz文件时出错？

Question

如标题，这是我的代码:

int decompress_one_file(char *infilename, char *outfilename)
{
    gzFile infile = gzopen(infilename, "rb");
    FILE *outfile = fopen(outfilename, "wb");
    if (!infile || !outfile) return -1;

    char buffer[128] = {NULL};
    int num_read = 0;
    num_read = gzread(infile, buffer, sizeof(buffer)); // crash here
    while (num_read > 0) {
        fwrite(buffer, 1, num_read, outfile);
    }

    gzclose(infile);
    fclose(outfile);
    return 0;
}

当我的控制台应用程序运行到gzread()时，它崩溃了，我不知道这是什么类型的错误？。 zlib版本:1.2.11

更新压缩功能:

int compress_one_file(char *infilename, char *outfilename)
{
    FILE *infile = fopen(infilename, "rb");
    gzFile outfile = gzopen(outfilename, "wb");
    if (!infile || !outfile) return -1;

    char inbuffer[128] = {NULL};
    int num_read = 0;
    unsigned long total_read = 0, total_wrote = 0;
    while ((num_read = fread(inbuffer, 1, sizeof(inbuffer), infile)) > 0) {
        total_read += num_read;
        gzwrite(outfile, inbuffer, num_read);
    }
    fclose(infile);
    gzclose(outfile);
    return 0;
}

显示错误:

有人知道这个错误吗？

Answer 1

我检查过，它在我的工作站上运行良好。可能是 gzip 压缩文件有问题？你能显示一个导致崩溃的文件吗？

但无论如何，你都会有一个 fwrite 的无限循环:

int num_read = 0;
while ((num_read = gzread(infile, buffer, sizeof(buffer))) > 0) {
    while (num_read > 0) {
        num_read -= fwrite(buffer, 1, num_read, outfile);
    }   
}