Method ReadBoxData

gcore/gdaljp2box.cpp:209–240

/************************************************************************/

GByte *GDALJP2Box::ReadBoxData()

{
    GIntBig nDataLength = GetDataLength();
    if (nDataLength > 100 * 1024 * 1024)
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "Too big box : " CPL_FRMT_GIB " bytes", nDataLength);
        return nullptr;
    }

    if (VSIFSeekL(fpVSIL, static_cast<vsi_l_offset>(nDataOffset), SEEK_SET) !=
        0)
        return nullptr;

    char *pszData = static_cast<char *>(
        VSI_MALLOC_VERBOSE(static_cast<int>(nDataLength) + 1));
    if (pszData == nullptr)
        return nullptr;

    if (static_cast<GIntBig>(VSIFReadL(
            pszData, 1, static_cast<int>(nDataLength), fpVSIL)) != nDataLength)
    {
        CPLError(CE_Failure, CPLE_AppDefined, "Cannot read box content");
        CPLFree(pszData);
        return nullptr;
    }

    pszData[nDataLength] = '\0';

    return reinterpret_cast<GByte *>(pszData);
}

/************************************************************************/
/*                           GetDataLength()                            */