local int unzlocal_GetCurrentFileInfoInternal OF()

in util/src/minizip/unzip.c [588:782]

• 166 lines of code
• 47 McCabe index (conditional complexity)

local int unzlocal_GetCurrentFileInfoInternal OF(
     (unzFile file,
      unz_file_info * pfile_info,
      unz_file_info_internal * pfile_info_internal,
      char *szFileName,
      uLong fileNameBufferSize,
      void *extraField,
      uLong extraFieldBufferSize,
      char *szComment,
      uLong commentBufferSize));

local int
unzlocal_GetCurrentFileInfoInternal(
    unzFile file,
    unz_file_info *pfile_info,
    unz_file_info_internal *pfile_info_internal,
    char *szFileName,
    uLong fileNameBufferSize,
    void *extraField,
    uLong extraFieldBufferSize,
    char *szComment,
    uLong commentBufferSize)
{
    unz_s *s;
    unz_file_info file_info;
    unz_file_info_internal file_info_internal;
    int err = UNZ_OK;
    uLong uMagic = 0x00000000;
    long lSeek = 0;

    if (file == NULL)
        return UNZ_PARAMERROR;
    s = (unz_s *) file;
    if (ZSEEK(s->z_filefunc, s->filestream,
              s->pos_in_central_dir + s->byte_before_the_zipfile,
              ZLIB_FILEFUNC_SEEK_SET) != 0)
        err = UNZ_ERRNO;

    /* we check the magic */
    if (err == UNZ_OK)
    {
        if (unzlocal_getLong(&s->z_filefunc, s->filestream, &uMagic) != UNZ_OK)
            err = UNZ_ERRNO;
    }
    else if (uMagic != 0x02014b50)
    {
        err = UNZ_BADZIPFILE;
    }

    if (unzlocal_getShort(&s->z_filefunc, s->filestream, &file_info.version) !=
        UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream, &file_info.version_needed) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort(&s->z_filefunc, s->filestream, &file_info.flag) !=
        UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream,
         &file_info.compression_method) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getLong(&s->z_filefunc, s->filestream, &file_info.dosDate) !=
        UNZ_OK)
        err = UNZ_ERRNO;

    unzlocal_DosDateToTmuDate(file_info.dosDate, &file_info.tmu_date);

    if (unzlocal_getLong(&s->z_filefunc, s->filestream, &file_info.crc) !=
        UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getLong
        (&s->z_filefunc, s->filestream, &file_info.compressed_size) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getLong
        (&s->z_filefunc, s->filestream, &file_info.uncompressed_size) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream, &file_info.size_filename) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream, &file_info.size_file_extra) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream, &file_info.size_file_comment) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort
        (&s->z_filefunc, s->filestream, &file_info.disk_num_start) != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getShort(&s->z_filefunc, s->filestream, &file_info.internal_fa)
        != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getLong(&s->z_filefunc, s->filestream, &file_info.external_fa)
        != UNZ_OK)
        err = UNZ_ERRNO;

    if (unzlocal_getLong
        (&s->z_filefunc, s->filestream,
         &file_info_internal.offset_curfile) != UNZ_OK)
        err = UNZ_ERRNO;

    lSeek += file_info.size_filename;
    if ((err == UNZ_OK) && (szFileName))
    {
        uLong uSizeRead;
        if (file_info.size_filename < fileNameBufferSize)
        {
            *(szFileName + file_info.size_filename) = '\0';
            uSizeRead = file_info.size_filename;
        }
        else
            uSizeRead = fileNameBufferSize;

        if ((file_info.size_filename > 0) && (fileNameBufferSize > 0))
            if (ZREAD(s->z_filefunc, s->filestream, szFileName, uSizeRead) !=
                uSizeRead)
                err = UNZ_ERRNO;
        lSeek -= uSizeRead;
    }

    if ((err == UNZ_OK) && (extraField))
    {
        uLong uSizeRead;
        if (file_info.size_file_extra < extraFieldBufferSize)
            uSizeRead = file_info.size_file_extra;
        else
            uSizeRead = extraFieldBufferSize;

        if (lSeek != 0)
        {
            if (ZSEEK
                (s->z_filefunc, s->filestream, lSeek,
                 ZLIB_FILEFUNC_SEEK_CUR) == 0)
                lSeek = 0;
            else
                err = UNZ_ERRNO;
        }
        if ((file_info.size_file_extra > 0) && (extraFieldBufferSize > 0))
            if (ZREAD(s->z_filefunc, s->filestream, extraField, uSizeRead) !=
                uSizeRead)
                err = UNZ_ERRNO;
        lSeek += file_info.size_file_extra - uSizeRead;
    }
    else
        lSeek += file_info.size_file_extra;

    if ((err == UNZ_OK) && (szComment))
    {
        uLong uSizeRead;
        if (file_info.size_file_comment < commentBufferSize)
        {
            *(szComment + file_info.size_file_comment) = '\0';
            uSizeRead = file_info.size_file_comment;
        }
        else
            uSizeRead = commentBufferSize;

        if (lSeek != 0)
        {
            if (ZSEEK
                (s->z_filefunc, s->filestream, lSeek,
                 ZLIB_FILEFUNC_SEEK_CUR) == 0)
                lSeek = 0;
            else
                err = UNZ_ERRNO;
        }
        if ((file_info.size_file_comment > 0) && (commentBufferSize > 0))
            if (ZREAD(s->z_filefunc, s->filestream, szComment, uSizeRead) !=
                uSizeRead)
                err = UNZ_ERRNO;
        lSeek += file_info.size_file_comment - uSizeRead;
    }
    else
        lSeek += file_info.size_file_comment;

    if ((err == UNZ_OK) && (pfile_info))
        *pfile_info = file_info;

    if ((err == UNZ_OK) && (pfile_info_internal))
        *pfile_info_internal = file_info_internal;

    return err;
}