avc_binwr.c

支持各种栅格图像和矢量图像读取的库

    AVCRawBinWriteInt32(psFile, psTxt->nUserId );
    AVCRawBinWriteInt32(psFile, psTxt->nLevel );
    AVCRawBinWriteFloat(psFile, psTxt->f_1e2 );
    AVCRawBinWriteInt32(psFile, psTxt->nSymbol );
    AVCRawBinWriteInt32(psFile, psTxt->numVerticesLine );
    AVCRawBinWriteInt32(psFile, psTxt->n28 );
    AVCRawBinWriteInt32(psFile, psTxt->numChars );
    AVCRawBinWriteInt32(psFile, psTxt->numVerticesArrow );

    for(i=0; i<20; i++)
    {
        AVCRawBinWriteInt16(psFile, psTxt->anJust1[i] );
    }
    for(i=0; i<20; i++)
    {
        AVCRawBinWriteInt16(psFile, psTxt->anJust2[i] );
    }

    if (nPrecision == AVC_SINGLE_PREC)
    {
        AVCRawBinWriteFloat(psFile, (float)psTxt->dHeight);
        AVCRawBinWriteFloat(psFile, (float)psTxt->dV2);
        AVCRawBinWriteFloat(psFile, (float)psTxt->dV3);
    }
    else
    {
        AVCRawBinWriteDouble(psFile, psTxt->dHeight);
        AVCRawBinWriteDouble(psFile, psTxt->dV2);
        AVCRawBinWriteDouble(psFile, psTxt->dV3);
    }

    if (nStrLen > 0)
        AVCRawBinWritePaddedString(psFile, nStrLen, psTxt->pszText);

    if (nPrecision == AVC_SINGLE_PREC)
    {
        for(i=0; i<numVertices; i++)
        {
            AVCRawBinWriteFloat(psFile, (float)psTxt->pasVertices[i].x);
            AVCRawBinWriteFloat(psFile, (float)psTxt->pasVertices[i].y);
        }
    }
    else
    {
        for(i=0; i<numVertices; i++)
        {
            AVCRawBinWriteDouble(psFile, psTxt->pasVertices[i].x);
            AVCRawBinWriteDouble(psFile, psTxt->pasVertices[i].y);
        }
    }

    AVCRawBinWriteZeros(psFile, 8);

    /*-----------------------------------------------------------------
     * Write index entry (cnx.adf)
     *----------------------------------------------------------------*/
    if (psIndexFile)
    {
        _AVCBinWriteIndexEntry(psIndexFile, nCurPos, nRecSize);
    }

    if (CPLGetLastErrorNo() != 0)
        return -1;

    return 0;
}

/**********************************************************************
 *                          _AVCBinWritePCCoverageTxt()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteTxt() instead)
 *
 * Write a TXT (Annotation) structure to a AVCCoverPC file.
 *
 * The contents of the psTxt structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * This function assumes that PC Coverages are always single precision.
 *
 * Returns 0 on success or -1 on error.
 **********************************************************************/
int _AVCBinWritePCCoverageTxt(AVCRawBinFile *psFile, AVCTxt *psTxt, 
                              int nPrecision, AVCRawBinFile *psIndexFile)
{
    int i, nRecSize, nCurPos, nStrLen, numVertices;

    CPLAssert(nPrecision == AVC_SINGLE_PREC);

    nCurPos = psFile->nCurPos/2;  /* Value in 2 byte words */

    AVCRawBinWriteInt32(psFile, psTxt->nTxtId);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    /*-----------------------------------------------------------------
     * Record size is expressed in 2 byte words, and does not count the
     * first 8 bytes of the TXT entry.
     *----------------------------------------------------------------*/
    /* String uses a multiple of 4 bytes of storage,
     * And if text is already a multiple of 4 bytes then we include 4 extra 
     * spaces anyways (was probably a bug in the software!).
     */
    if (psTxt->pszText)
        nStrLen = ((strlen(psTxt->pszText) + 4)/4)*4;
    else
        nStrLen = 4;

    nRecSize = (92 - 8 + nStrLen) / 2;

    AVCRawBinWriteInt32(psFile, nRecSize);
    AVCRawBinWriteInt32(psFile, psTxt->nLevel );

    /*-----------------------------------------------------------------
     * Number of vertices to write:
     * Note that because of the way V7 binary TXT files work, the rest of the
     * lib expects to receive duplicate coords for the first vertex, so
     * we will also receive an additional vertex for that but we won't write
     * it.  We also ignore the arrow vertices if there is any.
     *----------------------------------------------------------------*/
    numVertices = ABS(psTxt->numVerticesLine) -1;
    numVertices = MIN(4, numVertices);  /* Maximum of 4 points */

    AVCRawBinWriteInt32(psFile, numVertices );

    for(i=0; i<numVertices; i++)
    {
        AVCRawBinWriteFloat(psFile, (float)psTxt->pasVertices[i+1].x);
        AVCRawBinWriteFloat(psFile, (float)psTxt->pasVertices[i+1].y);
    }

    AVCRawBinWriteZeros(psFile, (4-numVertices)*4*2 + 28);

    AVCRawBinWriteFloat(psFile, (float)psTxt->dHeight);
    AVCRawBinWriteFloat(psFile, psTxt->f_1e2 );
    AVCRawBinWriteInt32(psFile, psTxt->nSymbol );
    AVCRawBinWriteInt32(psFile, psTxt->numChars );

    if (nStrLen > 0)
        AVCRawBinWritePaddedString(psFile, nStrLen, psTxt->pszText);

    /*-----------------------------------------------------------------
     * Write index entry (cnx.adf)
     *----------------------------------------------------------------*/
    if (psIndexFile)
    {
        _AVCBinWriteIndexEntry(psIndexFile, nCurPos, nRecSize);
    }

    if (CPLGetLastErrorNo() != 0)
        return -1;

    return 0;
}


/**********************************************************************
 *                          AVCBinWriteTxt()
 *
 * Write a TXT/TX6/TX7 (Annotation) structure to the file.
 *
 * The contents of the psTxt structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * Returns 0 on success or -1 on error.
 *
 * If a problem happens, then CPLError() will be called by the lower-level
 * functions and CPLGetLastErrorNo() can be used to find out what happened.
 **********************************************************************/
int AVCBinWriteTxt(AVCBinFile *psFile, AVCTxt *psTxt)
{
    if (psFile->eFileType != AVCFileTXT && psFile->eFileType != AVCFileTX6)
        return -1;

    /* AVCCoverPC and AVCCoverWeird have a different TXT format than AVCCoverV7
     */
    if (psFile->eCoverType == AVCCoverPC || 
        psFile->eCoverType == AVCCoverWeird)
    {
        return _AVCBinWritePCCoverageTxt(psFile->psRawBinFile, psTxt,
                                         psFile->nPrecision, 
                                         psFile->psIndexFile);
    }
    else
    {
        return _AVCBinWriteTxt(psFile->psRawBinFile, psTxt,
                               psFile->nPrecision, psFile->psIndexFile);
    }
}

/*=====================================================================
 *                              RXP
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteRxp()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteRxp() instead)
 *
 * Write a RXP (Region something...) structure to the file.
 *
 * The contents of the psRxp structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * Returns 0 on success or -1 on error.
 **********************************************************************/
int _AVCBinWriteRxp(AVCRawBinFile *psFile, AVCRxp *psRxp, 
                    int nPrecision)
{

    AVCRawBinWriteInt32(psFile, psRxp->n1);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    AVCRawBinWriteInt32(psFile, psRxp->n2);

    if (CPLGetLastErrorNo() != 0)
        return -1;

    return 0;
}

/**********************************************************************
 *                          AVCBinWriteRxp()
 *
 * Write a  RXP (Region something...) structure to the file.
 *
 * The contents of the psRxp structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * Returns 0 on success or -1 on error.
 *
 * If a problem happens, then CPLError() will be called by the lower-level
 * functions and CPLGetLastErrorNo() can be used to find out what happened.
 **********************************************************************/
int AVCBinWriteRxp(AVCBinFile *psFile, AVCRxp *psRxp)
{
    if (psFile->eFileType != AVCFileRXP)
        return -1;

    return _AVCBinWriteRxp(psFile->psRawBinFile, psRxp,
                           psFile->nPrecision);
}


/*=====================================================================
 *                              TABLES
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteArcDir()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteCreateTable() instead)
 *
 * Write an ARC.DIR entry at the current position in file.
 *
 * The contents of the psTableDef structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * Returns 0 on success or -1 on error.
 **********************************************************************/
int _AVCBinWriteArcDir(AVCRawBinFile *psFile, AVCTableDef *psTableDef)
{
    /* STRING values MUST be padded with spaces.
     */
    AVCRawBinWritePaddedString(psFile, 32, psTableDef->szTableName);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    AVCRawBinWritePaddedString(psFile, 8, psTableDef->szInfoFile);

    AVCRawBinWriteInt16(psFile, psTableDef->numFields);

    /* Record size must be a multiple of 2 bytes */
    AVCRawBinWriteInt16(psFile, (GInt16)(((psTableDef->nRecSize+1)/2)*2));

    /* ??? Unknown values ??? */
    AVCRawBinWritePaddedString(psFile, 16, "                    ");
    AVCRawBinWriteInt16(psFile, 132);
    AVCRawBinWriteInt16(psFile, 0);

    AVCRawBinWriteInt32(psFile, psTableDef->numRecords);

    AVCRawBinWriteZeros(psFile, 10);

    AVCRawBinWritePaddedString(psFile, 2, psTableDef->szExternal);

    AVCRawBinWriteZeros(psFile, 238);
    AVCRawBinWritePaddedString(psFile, 8, "                    ");
    AVCRawBinWriteZeros(psFile, 54);

    if (CPLGetLastErrorNo() != 0)
        return -1;

    return 0;
}


/**********************************************************************
 *                          _AVCBinWriteArcNit()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteCreateTable() instead)
 *
 * Write an ARC####.NIT entry at the current position in file.
 *
 * The contents of the psTableDef structure is assumed to be valid... this
 * function performs no validation on the consistency of what it is 
 * given as input.
 *
 * Returns 0 on success or -1 on error.
 **********************************************************************/
int _AVCBinWriteArcNit(AVCRawBinFile *psFile, AVCFieldInfo *psField)
{
    /* STRING values MUST be padded with spaces.
     */
    AVCRawBinWritePaddedString(psFile, 16, psField->szName);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    AVCRawBinWriteInt16(psFile, psField->nSize);
    AVCRawBinWriteInt16(psFile, psField->v2);
    AVCRawBinWriteInt16(psFile, psField->nOffset);
    AVCRawBinWriteInt16(psFile, psField->v4);
    AVCRawBinWriteInt16(psFile, psField->v5);
    AVCRawBinWriteInt16(psFile, psField->nFmtWidth);
    AVCRawBinWriteInt16(psFile, psField->nFmtPrec);
    AVCRawBinWriteInt16(psFile, psField->nType1);
    AVCRawBinWriteInt16(psFile, psField->nType2);
    AVCRawBinWriteInt16(psFile, psField->v10);
    AVCRawBinWriteInt16(psFile, psField->v11);
    AVCRawBinWriteInt16(psFile, psField->v12);
    AVCRawBinWriteInt16(psFile, psField->v13);

    AVCRawBinWritePaddedString(psFile, 16, psField->szAltName);

    AVCRawBinWriteZeros(psFile, 56);

    AVCRawBinWriteInt16(psFile, psField->nIndex);

    AVCRawBinWriteZeros(psFile, 28);

    if (CPLGetLastErrorNo() != 0)
        return -1;

    return 0;
}


/**********************************************************************
 *                     _AVCBinWriteCreateArcDirEntry()
 *
 * Add an entry in the ARC.DIR for the table defined in psSrcTableDef.
 *
 * If an entry with the same table name already exists then this entry