avc_binwr.c

支持各种栅格图像和矢量图像读取的库

        AVCRawBinWriteDouble(psFile, psPal->sMax.x);
        AVCRawBinWriteDouble(psFile, psPal->sMax.y);
    }

    AVCRawBinWriteInt32(psFile, psPal->numArcs);

    for(i=0; i<psPal->numArcs; i++)
    {
        AVCRawBinWriteInt32(psFile, psPal->pasArcs[i].nArcId);
        AVCRawBinWriteInt32(psFile, psPal->pasArcs[i].nFNode);
        AVCRawBinWriteInt32(psFile, psPal->pasArcs[i].nAdjPoly);
    }

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

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

    return 0;
}

/**********************************************************************
 *                          AVCBinWritePal()
 *
 * Write a PAL (Polygon Arc List) structure to the file.
 *
 * The contents of the psPal 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 AVCBinWritePal(AVCBinFile *psFile, AVCPal *psPal)
{
    if (psFile->eFileType != AVCFilePAL && psFile->eFileType != AVCFileRPL)
        return -1;

    return _AVCBinWritePal(psFile->psRawBinFile, psPal,
                           psFile->nPrecision, psFile->psIndexFile);
}

/*=====================================================================
 *                              CNT
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteCnt()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteCnt() instead)
 *
 * Write a CNT (Polygon Centroid) structure to the file.
 *
 * Returns 0 on success or -1 on error.
 **********************************************************************/
int _AVCBinWriteCnt(AVCRawBinFile *psFile, AVCCnt *psCnt, 
                              int nPrecision, AVCRawBinFile *psIndexFile)
{
    int i, nRecSize, nCurPos;

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

    AVCRawBinWriteInt32(psFile, psCnt->nPolyId);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    /*-----------------------------------------------------------------
     * Record size is expressed in 2 byte words, and does not count the
     * first 8 bytes of the CNT entry.
     *----------------------------------------------------------------*/
    nRecSize = ( 4 + psCnt->numLabels * 4 + 
                 2 * ((nPrecision == AVC_SINGLE_PREC)? 4 : 8)) / 2;

    AVCRawBinWriteInt32(psFile, nRecSize);

    if (nPrecision == AVC_SINGLE_PREC)
    {
        AVCRawBinWriteFloat(psFile, (float)psCnt->sCoord.x);
        AVCRawBinWriteFloat(psFile, (float)psCnt->sCoord.y);
    }
    else
    {
        AVCRawBinWriteDouble(psFile, psCnt->sCoord.x);
        AVCRawBinWriteDouble(psFile, psCnt->sCoord.y);
    }

    AVCRawBinWriteInt32(psFile, psCnt->numLabels);

    for(i=0; i<psCnt->numLabels; i++)
    {
        AVCRawBinWriteInt32(psFile, psCnt->panLabelIds[i]);
    }

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

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

    return 0;
}

/**********************************************************************
 *                          AVCBinWriteCnt()
 *
 * Write a CNT (Polygon Centroid) structure to the file.
 *
 * The contents of the psCnt 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 AVCBinWriteCnt(AVCBinFile *psFile, AVCCnt *psCnt)
{
    if (psFile->eFileType != AVCFileCNT)
        return -1;

    return _AVCBinWriteCnt(psFile->psRawBinFile, psCnt,
                           psFile->nPrecision, psFile->psIndexFile);
}

/*=====================================================================
 *                              LAB
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteLab()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteLab() instead)
 *
 * Write a LAB (Centroid Label) structure to the file.
 *
 * The contents of the psLab 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 _AVCBinWriteLab(AVCRawBinFile *psFile, AVCLab *psLab, 
                    int nPrecision)
{

    AVCRawBinWriteInt32(psFile, psLab->nValue);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    AVCRawBinWriteInt32(psFile, psLab->nPolyId);

    if (nPrecision == AVC_SINGLE_PREC)
    {
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord1.x);
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord1.y);
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord2.x);
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord2.y);
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord3.x);
        AVCRawBinWriteFloat(psFile, (float)psLab->sCoord3.y);
    }
    else
    {
        AVCRawBinWriteDouble(psFile, psLab->sCoord1.x);
        AVCRawBinWriteDouble(psFile, psLab->sCoord1.y);
        AVCRawBinWriteDouble(psFile, psLab->sCoord2.x);
        AVCRawBinWriteDouble(psFile, psLab->sCoord2.y);
        AVCRawBinWriteDouble(psFile, psLab->sCoord3.x);
        AVCRawBinWriteDouble(psFile, psLab->sCoord3.y);
    }

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

    return 0;
}


/**********************************************************************
 *                          AVCBinWriteLab()
 *
 * Write a LAB (Centroid Label) structure to the file.
 *
 * The contents of the psLab 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 AVCBinWriteLab(AVCBinFile *psFile, AVCLab *psLab)
{
    if (psFile->eFileType != AVCFileLAB)
        return -1;

    return _AVCBinWriteLab(psFile->psRawBinFile, psLab,
                           psFile->nPrecision);
}

/*=====================================================================
 *                              TOL
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteTol()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteTol() instead)
 *
 * Write a TOL (tolerance) structure to the file.
 *
 * The contents of the psTol 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 _AVCBinWriteTol(AVCRawBinFile *psFile, AVCTol *psTol, 
                    int nPrecision)
{

    AVCRawBinWriteInt32(psFile, psTol->nIndex);
    if (CPLGetLastErrorNo() != 0)
        return -1;

    AVCRawBinWriteInt32(psFile, psTol->nFlag);

    if (nPrecision == AVC_SINGLE_PREC)
    {
        AVCRawBinWriteFloat(psFile, (float)psTol->dValue);
    }
    else
    {
        AVCRawBinWriteDouble(psFile, psTol->dValue);
    }

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

    return 0;
}

/**********************************************************************
 *                          AVCBinWriteTol()
 *
 * Write a TOL (tolerance) structure to the file.
 *
 * The contents of the psTol 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 AVCBinWriteTol(AVCBinFile *psFile, AVCTol *psTol)
{
    if (psFile->eFileType != AVCFileTOL)
        return -1;

    return _AVCBinWriteTol(psFile->psRawBinFile, psTol,
                           psFile->nPrecision);
}

/*=====================================================================
 *                              PRJ
 *====================================================================*/

/**********************************************************************
 *                          AVCBinWritePrj()
 *
 * Write a PRJ (Projection info) to the file.
 *
 * Since a PRJ file is a simple text file and there is only ONE projection
 * info per prj.adf file, this function behaves differently from the 
 * other ones... all the job is done here, including creating and closing
 * the output file.
 *
 * The contents of the papszPrj 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 AVCBinWritePrj(AVCBinFile *psFile, char **papszPrj)
{
    if (psFile->eFileType != AVCFilePRJ)
        return -1;

    CSLSave(papszPrj, psFile->pszFilename);

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

    return 0;
}


/*=====================================================================
 *                              TXT/TX6/TX7
 *====================================================================*/

/**********************************************************************
 *                          _AVCBinWriteTxt()
 *
 * (This function is for internal library use... external calls should
 * go to AVCBinWriteTxt() instead)
 *
 * 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.
 **********************************************************************/
int _AVCBinWriteTxt(AVCRawBinFile *psFile, AVCTxt *psTxt, 
                              int nPrecision, AVCRawBinFile *psIndexFile)
{
    int i, nRecSize, nCurPos, nStrLen, numVertices;

    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 */
    if (psTxt->pszText)
        nStrLen = ((strlen(psTxt->pszText) + 3)/4)*4;
    else
        nStrLen = 0;

    numVertices = ABS(psTxt->numVerticesLine) + ABS(psTxt->numVerticesArrow);
    nRecSize = (112 + 8 + nStrLen + 
                (numVertices*2+3)* ((nPrecision == AVC_SINGLE_PREC)?4:8)) / 2;

    AVCRawBinWriteInt32(psFile, nRecSize);