C++ (Cpp) uncompr_lzss Exemples

Exemple #1

/*
=======================================
    TGL IEL1 文件读取
=======================================
*/
CR_API sFMT_DAT*
load_tgl_iel1 (
  __CR_IO__ iDATIN*         datin,
  __CR_IN__ const sLOADER*  param
    )
{
    leng_t      pksz;
    leng_t      unsz;
    void_t*     data;
    void_t*     temp;
    sFMT_DAT*   rett;
    sIEL1_HDR   head;

    /* 这个参数可能为空 */
    if (datin == NULL)
        return (NULL);

    /* 读取 & 检查头部 */
    if (!(CR_VCALL(datin)->geType(datin, &head, sIEL1_HDR)))
        return (NULL);
    if (head.magic != mk_tag4("IEL1"))
        return (NULL);

    /* 读取所有后续数据 */
    temp = CR_VCALL(datin)->get(datin, &pksz, FALSE);
    if (temp == NULL)
        return (NULL);

    /* 分配目标数据缓冲 */
    head.unsize = DWORD_LE(head.unsize);
    data = mem_malloc32(head.unsize);
    if (data == NULL) {
        mem_free(temp);
        return (NULL);
    }
    unsz = (leng_t)(head.unsize);
    pksz = uncompr_lzss(data, unsz, temp, pksz, 0);
    mem_free(temp);
    if (pksz != unsz)
        goto _failure;

    /* 返回读取的文件数据 */
    rett = struct_new(sFMT_DAT);
    if (rett == NULL)
        goto _failure;
    CR_NOUSE(param);
    rett->type = CR_FMTZ_DEC;
    rett->unsz = unsz;
    rett->pksz = dati_get_size(datin);
    rett->data = data;
    rett->infor = "TGL LZSS Compressed file (IEL1)";
    return (rett);

_failure:
    mem_free(data);
    return (NULL);
}

Exemple #2

/*
=======================================
    SZ20 文件读取
=======================================
*/
CR_API sFMT_DAT*
load_ms_sz20 (
  __CR_IO__ iDATIN*         datin,
  __CR_IN__ const sLOADER*  param
    )
{
    leng_t      pksz;
    leng_t      unsz;
    void_t*     data;
    void_t*     temp;
    sFMT_DAT*   rett;
    sSZ20_HDR   head;

    /* 这个参数可能为空 */
    if (datin == NULL)
        return (NULL);

    /* 读取 & 检查头部 */
    if (!(CR_VCALL(datin)->geType(datin, &head, sSZ20_HDR)))
        return (NULL);
    if (mem_cmp(head.tag, "SZ\x20\x88\xF0\x27\x33\xD1", 8) != 0)
        return (NULL);

    /* 读取所有后续数据 */
    temp = CR_VCALL(datin)->get(datin, &pksz, FALSE);
    if (temp == NULL)
        return (NULL);

    /* 分配目标数据缓冲 */
    head.unsize = DWORD_LE(head.unsize);
    data = mem_malloc32(head.unsize);
    if (data == NULL) {
        mem_free(temp);
        return (NULL);
    }
    unsz = (leng_t)(head.unsize);
    pksz = uncompr_lzss(data, unsz, temp, pksz, 0x20);
    mem_free(temp);
    if (pksz != unsz)
        goto _failure;

    /* 返回读取的文件数据 */
    rett = struct_new(sFMT_DAT);
    if (rett == NULL)
        goto _failure;
    CR_NOUSE(param);
    rett->type = CR_FMTZ_DEC;
    rett->unsz = unsz;
    rett->pksz = dati_get_size(datin);
    rett->data = data;
    rett->infor = "Microsoft Compressed (SZ20) file";
    return (rett);

_failure:
    mem_free(data);
    return (NULL);
}