mirror of
https://git.osgeo.org/gitea/postgis/postgis
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2238 lines
78 KiB
C
2238 lines
78 KiB
C
/******************************************************************************
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* $Id$
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*
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* Project: Shapelib
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* Purpose: Implementation of .dbf access API documented in dbf_api.html.
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* Author: Frank Warmerdam, warmerdam@pobox.com
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*
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******************************************************************************
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* Copyright (c) 1999, Frank Warmerdam
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*
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* This software is available under the following "MIT Style" license,
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* or at the option of the licensee under the LGPL (see LICENSE.LGPL). This
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* option is discussed in more detail in shapelib.html.
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*
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* --
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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******************************************************************************
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*
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* $Log: dbfopen.c,v $
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* Revision 1.89 2011-07-24 05:59:25 fwarmerdam
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* minimize use of CPLError in favor of SAHooks.Error()
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*
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* Revision 1.88 2011-05-13 17:35:17 fwarmerdam
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* added DBFReorderFields() and DBFAlterFields() functions (from Even)
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*
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* Revision 1.87 2011-05-07 22:41:02 fwarmerdam
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* ensure pending record is flushed when adding a native field (GDAL #4073)
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*
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* Revision 1.86 2011-04-17 15:15:29 fwarmerdam
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* Removed unused variable.
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*
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* Revision 1.85 2010-12-06 16:09:34 fwarmerdam
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* fix buffer read overrun fetching code page (bug 2276)
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*
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* Revision 1.84 2009-10-29 19:59:48 fwarmerdam
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* avoid crash on truncated header (gdal #3093)
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*
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* Revision 1.83 2008/11/12 14:28:15 fwarmerdam
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* DBFCreateField() now works on files with records
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*
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* Revision 1.82 2008/11/11 17:47:09 fwarmerdam
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* added DBFDeleteField() function
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*
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* Revision 1.81 2008/01/03 17:48:13 bram
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* in DBFCreate, use default code page LDID/87 (= 0x57, ANSI)
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* instead of LDID/3. This seems to be the same as what ESRI
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* would be doing by default.
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*
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* Revision 1.80 2007/12/30 14:36:39 fwarmerdam
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* avoid syntax issue with last comment.
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*
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* Revision 1.79 2007/12/30 14:35:48 fwarmerdam
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* Avoid char* / unsigned char* warnings.
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*
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* Revision 1.78 2007/12/18 18:28:07 bram
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* - create hook for client specific atof (bugzilla ticket 1615)
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* - check for NULL handle before closing cpCPG file, and close after reading.
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*
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* Revision 1.77 2007/12/15 20:25:21 bram
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* dbfopen.c now reads the Code Page information from the DBF file, and exports
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* this information as a string through the DBFGetCodePage function. This is
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* either the number from the LDID header field ("LDID/<number>") or as the
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* content of an accompanying .CPG file. When creating a DBF file, the code can
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* be set using DBFCreateEx.
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*
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* Revision 1.76 2007/12/12 22:21:32 bram
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* DBFClose: check for NULL psDBF handle before trying to close it.
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*
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* Revision 1.75 2007/12/06 13:58:19 fwarmerdam
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* make sure file offset calculations are done in as SAOffset
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*
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* Revision 1.74 2007/12/06 07:00:25 fwarmerdam
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* dbfopen now using SAHooks for fileio
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*
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* Revision 1.73 2007/09/03 19:48:11 fwarmerdam
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* move DBFReadAttribute() static dDoubleField into dbfinfo
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*
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* Revision 1.72 2007/09/03 19:34:06 fwarmerdam
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* Avoid use of static tuple buffer in DBFReadTuple()
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*
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* Revision 1.71 2006/06/22 14:37:18 fwarmerdam
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* avoid memory leak if dbfopen fread fails
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*
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* Revision 1.70 2006/06/17 17:47:05 fwarmerdam
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* use calloc() for dbfinfo in DBFCreate
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*
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* Revision 1.69 2006/06/17 15:34:32 fwarmerdam
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* disallow creating fields wider than 255
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*
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* Revision 1.68 2006/06/17 15:12:40 fwarmerdam
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* Fixed C++ style comments.
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*
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* Revision 1.67 2006/06/17 00:24:53 fwarmerdam
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* Don't treat non-zero decimals values as high order byte for length
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* for strings. It causes serious corruption for some files.
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* http://bugzilla.remotesensing.org/show_bug.cgi?id=1202
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*
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* Revision 1.66 2006/03/29 18:26:20 fwarmerdam
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* fixed bug with size of pachfieldtype in dbfcloneempty
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*
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* Revision 1.65 2006/02/15 01:14:30 fwarmerdam
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* added DBFAddNativeFieldType
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*
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* Revision 1.64 2006/02/09 00:29:04 fwarmerdam
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* Changed to put spaces into string fields that are NULL as
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* per http://bugzilla.maptools.org/show_bug.cgi?id=316.
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*
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* Revision 1.63 2006/01/25 15:35:43 fwarmerdam
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* check success on DBFFlushRecord
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*
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* Revision 1.62 2006/01/10 16:28:03 fwarmerdam
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* Fixed typo in CPLError.
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*
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* Revision 1.61 2006/01/10 16:26:29 fwarmerdam
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* Push loading record buffer into DBFLoadRecord.
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* Implement CPL error reporting if USE_CPL defined.
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*
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* Revision 1.60 2006/01/05 01:27:27 fwarmerdam
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* added dbf deletion mark/fetch
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*
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* Revision 1.59 2005/03/14 15:20:28 fwarmerdam
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* Fixed last change.
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*
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* Revision 1.58 2005/03/14 15:18:54 fwarmerdam
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* Treat very wide fields with no decimals as double. This is
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* more than 32bit integer fields.
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*
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* Revision 1.57 2005/02/10 20:16:54 fwarmerdam
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* Make the pszStringField buffer for DBFReadAttribute() static char [256]
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* as per bug 306.
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*
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* Revision 1.56 2005/02/10 20:07:56 fwarmerdam
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* Fixed bug 305 in DBFCloneEmpty() - header length problem.
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*
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* Revision 1.55 2004/09/26 20:23:46 fwarmerdam
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* avoid warnings with rcsid and signed/unsigned stuff
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*
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* Revision 1.54 2004/09/15 16:26:10 fwarmerdam
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* Treat all blank numeric fields as null too.
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*/
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#include "shapefil.h"
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#include <math.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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SHP_CVSID("$Id$")
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#ifndef FALSE
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# define FALSE 0
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# define TRUE 1
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#endif
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/************************************************************************/
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/* SfRealloc() */
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/* */
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/* A realloc cover function that will access a NULL pointer as */
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/* a valid input. */
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/************************************************************************/
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static void * SfRealloc( void * pMem, int nNewSize )
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{
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if( pMem == NULL )
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return( (void *) malloc(nNewSize) );
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else
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return( (void *) realloc(pMem,nNewSize) );
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}
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/************************************************************************/
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/* DBFWriteHeader() */
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/* */
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/* This is called to write out the file header, and field */
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/* descriptions before writing any actual data records. This */
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/* also computes all the DBFDataSet field offset/size/decimals */
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/* and so forth values. */
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/************************************************************************/
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static void DBFWriteHeader(DBFHandle psDBF)
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{
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unsigned char abyHeader[XBASE_FLDHDR_SZ];
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int i;
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if( !psDBF->bNoHeader )
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return;
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psDBF->bNoHeader = FALSE;
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/* -------------------------------------------------------------------- */
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/* Initialize the file header information. */
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/* -------------------------------------------------------------------- */
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for( i = 0; i < XBASE_FLDHDR_SZ; i++ )
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abyHeader[i] = 0;
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abyHeader[0] = 0x03; /* memo field? - just copying */
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/* write out a dummy date */
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abyHeader[1] = 95; /* YY */
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abyHeader[2] = 7; /* MM */
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abyHeader[3] = 26; /* DD */
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/* record count preset at zero */
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abyHeader[8] = (unsigned char) (psDBF->nHeaderLength % 256);
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abyHeader[9] = (unsigned char) (psDBF->nHeaderLength / 256);
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abyHeader[10] = (unsigned char) (psDBF->nRecordLength % 256);
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abyHeader[11] = (unsigned char) (psDBF->nRecordLength / 256);
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abyHeader[29] = (unsigned char) (psDBF->iLanguageDriver);
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/* -------------------------------------------------------------------- */
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/* Write the initial 32 byte file header, and all the field */
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/* descriptions. */
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/* -------------------------------------------------------------------- */
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psDBF->sHooks.FSeek( psDBF->fp, 0, 0 );
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psDBF->sHooks.FWrite( abyHeader, XBASE_FLDHDR_SZ, 1, psDBF->fp );
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psDBF->sHooks.FWrite( psDBF->pszHeader, XBASE_FLDHDR_SZ, psDBF->nFields,
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psDBF->fp );
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/* -------------------------------------------------------------------- */
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/* Write out the newline character if there is room for it. */
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/* -------------------------------------------------------------------- */
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if( psDBF->nHeaderLength > 32*psDBF->nFields + 32 )
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{
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char cNewline;
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cNewline = 0x0d;
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psDBF->sHooks.FWrite( &cNewline, 1, 1, psDBF->fp );
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}
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}
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/************************************************************************/
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/* DBFFlushRecord() */
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/* */
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/* Write out the current record if there is one. */
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/************************************************************************/
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static int DBFFlushRecord( DBFHandle psDBF )
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{
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SAOffset nRecordOffset;
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if( psDBF->bCurrentRecordModified && psDBF->nCurrentRecord > -1 )
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{
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psDBF->bCurrentRecordModified = FALSE;
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nRecordOffset =
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psDBF->nRecordLength * (SAOffset) psDBF->nCurrentRecord
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+ psDBF->nHeaderLength;
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if( psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 ) != 0
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|| psDBF->sHooks.FWrite( psDBF->pszCurrentRecord,
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psDBF->nRecordLength,
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1, psDBF->fp ) != 1 )
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{
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char szMessage[128];
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sprintf( szMessage, "Failure writing DBF record %d.",
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psDBF->nCurrentRecord );
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psDBF->sHooks.Error( szMessage );
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return FALSE;
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}
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}
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return TRUE;
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}
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/************************************************************************/
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/* DBFLoadRecord() */
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/************************************************************************/
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static int DBFLoadRecord( DBFHandle psDBF, int iRecord )
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{
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if( psDBF->nCurrentRecord != iRecord )
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{
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SAOffset nRecordOffset;
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if( !DBFFlushRecord( psDBF ) )
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return FALSE;
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nRecordOffset =
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psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
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if( psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, SEEK_SET ) != 0 )
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{
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char szMessage[128];
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sprintf( szMessage, "fseek(%ld) failed on DBF file.\n",
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(long) nRecordOffset );
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psDBF->sHooks.Error( szMessage );
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return FALSE;
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}
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if( psDBF->sHooks.FRead( psDBF->pszCurrentRecord,
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psDBF->nRecordLength, 1, psDBF->fp ) != 1 )
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{
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char szMessage[128];
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sprintf( szMessage, "fread(%d) failed on DBF file.\n",
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psDBF->nRecordLength );
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psDBF->sHooks.Error( szMessage );
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return FALSE;
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}
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psDBF->nCurrentRecord = iRecord;
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}
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return TRUE;
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}
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/************************************************************************/
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/* DBFUpdateHeader() */
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/************************************************************************/
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void SHPAPI_CALL
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DBFUpdateHeader( DBFHandle psDBF )
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{
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unsigned char abyFileHeader[32];
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if( psDBF->bNoHeader )
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DBFWriteHeader( psDBF );
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DBFFlushRecord( psDBF );
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psDBF->sHooks.FSeek( psDBF->fp, 0, 0 );
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psDBF->sHooks.FRead( abyFileHeader, 32, 1, psDBF->fp );
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abyFileHeader[4] = (unsigned char) (psDBF->nRecords % 256);
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abyFileHeader[5] = (unsigned char) ((psDBF->nRecords/256) % 256);
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abyFileHeader[6] = (unsigned char) ((psDBF->nRecords/(256*256)) % 256);
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abyFileHeader[7] = (unsigned char) ((psDBF->nRecords/(256*256*256)) % 256);
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psDBF->sHooks.FSeek( psDBF->fp, 0, 0 );
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psDBF->sHooks.FWrite( abyFileHeader, 32, 1, psDBF->fp );
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psDBF->sHooks.FFlush( psDBF->fp );
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}
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/************************************************************************/
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/* DBFOpen() */
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/* */
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/* Open a .dbf file. */
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/************************************************************************/
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DBFHandle SHPAPI_CALL
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DBFOpen( const char * pszFilename, const char * pszAccess )
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{
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SAHooks sHooks;
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SASetupDefaultHooks( &sHooks );
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return DBFOpenLL( pszFilename, pszAccess, &sHooks );
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}
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/************************************************************************/
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/* DBFOpen() */
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/* */
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/* Open a .dbf file. */
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/************************************************************************/
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DBFHandle SHPAPI_CALL
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DBFOpenLL( const char * pszFilename, const char * pszAccess, SAHooks *psHooks )
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{
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DBFHandle psDBF;
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SAFile pfCPG;
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unsigned char *pabyBuf;
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int nFields, nHeadLen, iField, i;
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char *pszBasename, *pszFullname;
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int nBufSize = 500;
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/* -------------------------------------------------------------------- */
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/* We only allow the access strings "rb" and "r+". */
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/* -------------------------------------------------------------------- */
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if( strcmp(pszAccess,"r") != 0 && strcmp(pszAccess,"r+") != 0
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&& strcmp(pszAccess,"rb") != 0 && strcmp(pszAccess,"rb+") != 0
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&& strcmp(pszAccess,"r+b") != 0 )
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return( NULL );
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if( strcmp(pszAccess,"r") == 0 )
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pszAccess = "rb";
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if( strcmp(pszAccess,"r+") == 0 )
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pszAccess = "rb+";
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/* -------------------------------------------------------------------- */
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/* Compute the base (layer) name. If there is any extension */
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/* on the passed in filename we will strip it off. */
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/* -------------------------------------------------------------------- */
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pszBasename = (char *) malloc(strlen(pszFilename)+5);
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strcpy( pszBasename, pszFilename );
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for( i = strlen(pszBasename)-1;
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i > 0 && pszBasename[i] != '.' && pszBasename[i] != '/'
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&& pszBasename[i] != '\\';
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i-- ) {}
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if( pszBasename[i] == '.' )
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pszBasename[i] = '\0';
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pszFullname = (char *) malloc(strlen(pszBasename) + 5);
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sprintf( pszFullname, "%s.dbf", pszBasename );
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psDBF = (DBFHandle) calloc( 1, sizeof(DBFInfo) );
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psDBF->fp = psHooks->FOpen( pszFullname, pszAccess );
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memcpy( &(psDBF->sHooks), psHooks, sizeof(SAHooks) );
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if( psDBF->fp == NULL )
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{
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sprintf( pszFullname, "%s.DBF", pszBasename );
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psDBF->fp = psDBF->sHooks.FOpen(pszFullname, pszAccess );
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}
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sprintf( pszFullname, "%s.cpg", pszBasename );
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pfCPG = psHooks->FOpen( pszFullname, "r" );
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if( pfCPG == NULL )
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{
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sprintf( pszFullname, "%s.CPG", pszBasename );
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pfCPG = psHooks->FOpen( pszFullname, "r" );
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}
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free( pszBasename );
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free( pszFullname );
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if( psDBF->fp == NULL )
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{
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free( psDBF );
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if( pfCPG ) psHooks->FClose( pfCPG );
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return( NULL );
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}
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psDBF->bNoHeader = FALSE;
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psDBF->nCurrentRecord = -1;
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psDBF->bCurrentRecordModified = FALSE;
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/* -------------------------------------------------------------------- */
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/* Read Table Header info */
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/* -------------------------------------------------------------------- */
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pabyBuf = (unsigned char *) malloc(nBufSize);
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if( psDBF->sHooks.FRead( pabyBuf, 32, 1, psDBF->fp ) != 1 )
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{
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psDBF->sHooks.FClose( psDBF->fp );
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if( pfCPG ) psDBF->sHooks.FClose( pfCPG );
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free( pabyBuf );
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free( psDBF );
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return NULL;
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}
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psDBF->nRecords =
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pabyBuf[4] + pabyBuf[5]*256 + pabyBuf[6]*256*256 + pabyBuf[7]*256*256*256;
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psDBF->nHeaderLength = nHeadLen = pabyBuf[8] + pabyBuf[9]*256;
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psDBF->nRecordLength = pabyBuf[10] + pabyBuf[11]*256;
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psDBF->iLanguageDriver = pabyBuf[29];
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if (nHeadLen < 32)
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{
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psDBF->sHooks.FClose( psDBF->fp );
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if( pfCPG ) psDBF->sHooks.FClose( pfCPG );
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free( pabyBuf );
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free( psDBF );
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return NULL;
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}
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psDBF->nFields = nFields = (nHeadLen - 32) / 32;
|
|
|
|
psDBF->pszCurrentRecord = (char *) malloc(psDBF->nRecordLength);
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Figure out the code page from the LDID and CPG */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
psDBF->pszCodePage = NULL;
|
|
if( pfCPG )
|
|
{
|
|
size_t n;
|
|
memset( pabyBuf, 0, nBufSize);
|
|
psDBF->sHooks.FRead( pabyBuf, nBufSize - 1, 1, pfCPG );
|
|
n = strcspn( (char *) pabyBuf, "\n\r" );
|
|
if( n > 0 )
|
|
{
|
|
pabyBuf[n] = '\0';
|
|
psDBF->pszCodePage = (char *) malloc(n + 1);
|
|
memcpy( psDBF->pszCodePage, pabyBuf, n + 1 );
|
|
}
|
|
psDBF->sHooks.FClose( pfCPG );
|
|
}
|
|
if( psDBF->pszCodePage == NULL && pabyBuf[29] != 0 )
|
|
{
|
|
sprintf( (char *) pabyBuf, "LDID/%d", psDBF->iLanguageDriver );
|
|
psDBF->pszCodePage = (char *) malloc(strlen((char*)pabyBuf) + 1);
|
|
strcpy( psDBF->pszCodePage, (char *) pabyBuf );
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Read in Field Definitions */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
pabyBuf = (unsigned char *) SfRealloc(pabyBuf,nHeadLen);
|
|
psDBF->pszHeader = (char *) pabyBuf;
|
|
|
|
psDBF->sHooks.FSeek( psDBF->fp, 32, 0 );
|
|
if( psDBF->sHooks.FRead( pabyBuf, nHeadLen-32, 1, psDBF->fp ) != 1 )
|
|
{
|
|
psDBF->sHooks.FClose( psDBF->fp );
|
|
free( pabyBuf );
|
|
free( psDBF->pszCurrentRecord );
|
|
free( psDBF );
|
|
return NULL;
|
|
}
|
|
|
|
psDBF->panFieldOffset = (int *) malloc(sizeof(int) * nFields);
|
|
psDBF->panFieldSize = (int *) malloc(sizeof(int) * nFields);
|
|
psDBF->panFieldDecimals = (int *) malloc(sizeof(int) * nFields);
|
|
psDBF->pachFieldType = (char *) malloc(sizeof(char) * nFields);
|
|
|
|
for( iField = 0; iField < nFields; iField++ )
|
|
{
|
|
unsigned char *pabyFInfo;
|
|
|
|
pabyFInfo = pabyBuf+iField*32;
|
|
|
|
if( pabyFInfo[11] == 'N' || pabyFInfo[11] == 'F' )
|
|
{
|
|
psDBF->panFieldSize[iField] = pabyFInfo[16];
|
|
psDBF->panFieldDecimals[iField] = pabyFInfo[17];
|
|
}
|
|
else
|
|
{
|
|
psDBF->panFieldSize[iField] = pabyFInfo[16];
|
|
psDBF->panFieldDecimals[iField] = 0;
|
|
|
|
/*
|
|
** The following seemed to be used sometimes to handle files with long
|
|
** string fields, but in other cases (such as bug 1202) the decimals field
|
|
** just seems to indicate some sort of preferred formatting, not very
|
|
** wide fields. So I have disabled this code. FrankW.
|
|
psDBF->panFieldSize[iField] = pabyFInfo[16] + pabyFInfo[17]*256;
|
|
psDBF->panFieldDecimals[iField] = 0;
|
|
*/
|
|
}
|
|
|
|
psDBF->pachFieldType[iField] = (char) pabyFInfo[11];
|
|
if( iField == 0 )
|
|
psDBF->panFieldOffset[iField] = 1;
|
|
else
|
|
psDBF->panFieldOffset[iField] =
|
|
psDBF->panFieldOffset[iField-1] + psDBF->panFieldSize[iField-1];
|
|
}
|
|
|
|
return( psDBF );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFClose() */
|
|
/************************************************************************/
|
|
|
|
void SHPAPI_CALL
|
|
DBFClose(DBFHandle psDBF)
|
|
{
|
|
if( psDBF == NULL )
|
|
return;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Write out header if not already written. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( psDBF->bNoHeader )
|
|
DBFWriteHeader( psDBF );
|
|
|
|
DBFFlushRecord( psDBF );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Update last access date, and number of records if we have */
|
|
/* write access. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( psDBF->bUpdated )
|
|
DBFUpdateHeader( psDBF );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Close, and free resources. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->sHooks.FClose( psDBF->fp );
|
|
|
|
if( psDBF->panFieldOffset != NULL )
|
|
{
|
|
free( psDBF->panFieldOffset );
|
|
free( psDBF->panFieldSize );
|
|
free( psDBF->panFieldDecimals );
|
|
free( psDBF->pachFieldType );
|
|
}
|
|
|
|
if( psDBF->pszWorkField != NULL )
|
|
free( psDBF->pszWorkField );
|
|
|
|
free( psDBF->pszHeader );
|
|
free( psDBF->pszCurrentRecord );
|
|
free( psDBF->pszCodePage );
|
|
|
|
free( psDBF );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFCreate() */
|
|
/* */
|
|
/* Create a new .dbf file with default code page LDID/87 (0x57) */
|
|
/************************************************************************/
|
|
|
|
DBFHandle SHPAPI_CALL
|
|
DBFCreate( const char * pszFilename )
|
|
|
|
{
|
|
return DBFCreateEx( pszFilename, "LDID/87" ); // 0x57
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFCreateEx() */
|
|
/* */
|
|
/* Create a new .dbf file. */
|
|
/************************************************************************/
|
|
|
|
DBFHandle SHPAPI_CALL
|
|
DBFCreateEx( const char * pszFilename, const char* pszCodePage )
|
|
|
|
{
|
|
SAHooks sHooks;
|
|
|
|
SASetupDefaultHooks( &sHooks );
|
|
|
|
return DBFCreateLL( pszFilename, pszCodePage , &sHooks );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFCreate() */
|
|
/* */
|
|
/* Create a new .dbf file. */
|
|
/************************************************************************/
|
|
|
|
DBFHandle SHPAPI_CALL
|
|
DBFCreateLL( const char * pszFilename, const char * pszCodePage, SAHooks *psHooks )
|
|
|
|
{
|
|
DBFHandle psDBF;
|
|
SAFile fp;
|
|
char *pszFullname, *pszBasename;
|
|
int i, ldid = -1;
|
|
char chZero = '\0';
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Compute the base (layer) name. If there is any extension */
|
|
/* on the passed in filename we will strip it off. */
|
|
/* -------------------------------------------------------------------- */
|
|
pszBasename = (char *) malloc(strlen(pszFilename)+5);
|
|
strcpy( pszBasename, pszFilename );
|
|
for( i = strlen(pszBasename)-1;
|
|
i > 0 && pszBasename[i] != '.' && pszBasename[i] != '/'
|
|
&& pszBasename[i] != '\\';
|
|
i-- ) {}
|
|
|
|
if( pszBasename[i] == '.' )
|
|
pszBasename[i] = '\0';
|
|
|
|
pszFullname = (char *) malloc(strlen(pszBasename) + 5);
|
|
sprintf( pszFullname, "%s.dbf", pszBasename );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Create the file. */
|
|
/* -------------------------------------------------------------------- */
|
|
fp = psHooks->FOpen( pszFullname, "wb" );
|
|
if( fp == NULL )
|
|
return( NULL );
|
|
|
|
psHooks->FWrite( &chZero, 1, 1, fp );
|
|
psHooks->FClose( fp );
|
|
|
|
fp = psHooks->FOpen( pszFullname, "rb+" );
|
|
if( fp == NULL )
|
|
return( NULL );
|
|
|
|
|
|
sprintf( pszFullname, "%s.cpg", pszBasename );
|
|
if( pszCodePage != NULL )
|
|
{
|
|
if( strncmp( pszCodePage, "LDID/", 5 ) == 0 )
|
|
{
|
|
ldid = atoi( pszCodePage + 5 );
|
|
if( ldid > 255 )
|
|
ldid = -1; // don't use 0 to indicate out of range as LDID/0 is a valid one
|
|
}
|
|
if( ldid < 0 )
|
|
{
|
|
SAFile fpCPG = psHooks->FOpen( pszFullname, "w" );
|
|
psHooks->FWrite( (char*) pszCodePage, strlen(pszCodePage), 1, fpCPG );
|
|
psHooks->FClose( fpCPG );
|
|
}
|
|
}
|
|
if( pszCodePage == NULL || ldid >= 0 )
|
|
{
|
|
psHooks->Remove( pszFullname );
|
|
}
|
|
|
|
free( pszBasename );
|
|
free( pszFullname );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Create the info structure. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF = (DBFHandle) calloc(1,sizeof(DBFInfo));
|
|
|
|
memcpy( &(psDBF->sHooks), psHooks, sizeof(SAHooks) );
|
|
psDBF->fp = fp;
|
|
psDBF->nRecords = 0;
|
|
psDBF->nFields = 0;
|
|
psDBF->nRecordLength = 1;
|
|
psDBF->nHeaderLength = 33;
|
|
|
|
psDBF->panFieldOffset = NULL;
|
|
psDBF->panFieldSize = NULL;
|
|
psDBF->panFieldDecimals = NULL;
|
|
psDBF->pachFieldType = NULL;
|
|
psDBF->pszHeader = NULL;
|
|
|
|
psDBF->nCurrentRecord = -1;
|
|
psDBF->bCurrentRecordModified = FALSE;
|
|
psDBF->pszCurrentRecord = NULL;
|
|
|
|
psDBF->bNoHeader = TRUE;
|
|
|
|
psDBF->iLanguageDriver = ldid > 0 ? ldid : 0;
|
|
psDBF->pszCodePage = NULL;
|
|
if( pszCodePage )
|
|
{
|
|
psDBF->pszCodePage = (char * ) malloc( strlen(pszCodePage) + 1 );
|
|
strcpy( psDBF->pszCodePage, pszCodePage );
|
|
}
|
|
|
|
return( psDBF );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFAddField() */
|
|
/* */
|
|
/* Add a field to a newly created .dbf or to an existing one */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFAddField(DBFHandle psDBF, const char * pszFieldName,
|
|
DBFFieldType eType, int nWidth, int nDecimals )
|
|
|
|
{
|
|
char chNativeType = 'C';
|
|
|
|
if( eType == FTLogical )
|
|
chNativeType = 'L';
|
|
else if( eType == FTString )
|
|
chNativeType = 'C';
|
|
else if( eType == FTDate )
|
|
chNativeType = 'D';
|
|
else
|
|
chNativeType = 'N';
|
|
|
|
return DBFAddNativeFieldType( psDBF, pszFieldName, chNativeType,
|
|
nWidth, nDecimals );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetNullCharacter() */
|
|
/************************************************************************/
|
|
|
|
static char DBFGetNullCharacter(char chType)
|
|
{
|
|
switch (chType)
|
|
{
|
|
case 'N':
|
|
case 'F':
|
|
return '*';
|
|
case 'D':
|
|
return '0';
|
|
case 'L':
|
|
return '?';
|
|
default:
|
|
return ' ';
|
|
}
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFAddField() */
|
|
/* */
|
|
/* Add a field to a newly created .dbf file before any records */
|
|
/* are written. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFAddNativeFieldType(DBFHandle psDBF, const char * pszFieldName,
|
|
char chType, int nWidth, int nDecimals )
|
|
|
|
{
|
|
char *pszFInfo;
|
|
int i;
|
|
int nOldRecordLength, nOldHeaderLength;
|
|
char *pszRecord;
|
|
char chFieldFill;
|
|
SAOffset nRecordOffset;
|
|
|
|
/* make sure that everything is written in .dbf */
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return -1;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Do some checking to ensure we can add records to this file. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( nWidth < 1 )
|
|
return -1;
|
|
|
|
if( nWidth > 255 )
|
|
nWidth = 255;
|
|
|
|
nOldRecordLength = psDBF->nRecordLength;
|
|
nOldHeaderLength = psDBF->nHeaderLength;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* SfRealloc all the arrays larger to hold the additional field */
|
|
/* information. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->nFields++;
|
|
|
|
psDBF->panFieldOffset = (int *)
|
|
SfRealloc( psDBF->panFieldOffset, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->panFieldSize = (int *)
|
|
SfRealloc( psDBF->panFieldSize, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->panFieldDecimals = (int *)
|
|
SfRealloc( psDBF->panFieldDecimals, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->pachFieldType = (char *)
|
|
SfRealloc( psDBF->pachFieldType, sizeof(char) * psDBF->nFields );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Assign the new field information fields. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->panFieldOffset[psDBF->nFields-1] = psDBF->nRecordLength;
|
|
psDBF->nRecordLength += nWidth;
|
|
psDBF->panFieldSize[psDBF->nFields-1] = nWidth;
|
|
psDBF->panFieldDecimals[psDBF->nFields-1] = nDecimals;
|
|
psDBF->pachFieldType[psDBF->nFields-1] = chType;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Extend the required header information. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->nHeaderLength += 32;
|
|
psDBF->bUpdated = FALSE;
|
|
|
|
psDBF->pszHeader = (char *) SfRealloc(psDBF->pszHeader,psDBF->nFields*32);
|
|
|
|
pszFInfo = psDBF->pszHeader + 32 * (psDBF->nFields-1);
|
|
|
|
for( i = 0; i < 32; i++ )
|
|
pszFInfo[i] = '\0';
|
|
|
|
if( (int) strlen(pszFieldName) < 10 )
|
|
strncpy( pszFInfo, pszFieldName, strlen(pszFieldName));
|
|
else
|
|
strncpy( pszFInfo, pszFieldName, 10);
|
|
|
|
pszFInfo[11] = psDBF->pachFieldType[psDBF->nFields-1];
|
|
|
|
if( chType == 'C' )
|
|
{
|
|
pszFInfo[16] = (unsigned char) (nWidth % 256);
|
|
pszFInfo[17] = (unsigned char) (nWidth / 256);
|
|
}
|
|
else
|
|
{
|
|
pszFInfo[16] = (unsigned char) nWidth;
|
|
pszFInfo[17] = (unsigned char) nDecimals;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Make the current record buffer appropriately larger. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->pszCurrentRecord = (char *) SfRealloc(psDBF->pszCurrentRecord,
|
|
psDBF->nRecordLength);
|
|
|
|
/* we're done if dealing with new .dbf */
|
|
if( psDBF->bNoHeader )
|
|
return( psDBF->nFields - 1 );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* For existing .dbf file, shift records */
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
/* alloc record */
|
|
pszRecord = (char *) malloc(sizeof(char) * psDBF->nRecordLength);
|
|
|
|
chFieldFill = DBFGetNullCharacter(chType);
|
|
|
|
for (i = psDBF->nRecords-1; i >= 0; --i)
|
|
{
|
|
nRecordOffset = nOldRecordLength * (SAOffset) i + nOldHeaderLength;
|
|
|
|
/* load record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FRead( pszRecord, nOldRecordLength, 1, psDBF->fp );
|
|
|
|
/* set new field's value to NULL */
|
|
memset(pszRecord + nOldRecordLength, chFieldFill, nWidth);
|
|
|
|
nRecordOffset = psDBF->nRecordLength * (SAOffset) i + psDBF->nHeaderLength;
|
|
|
|
/* move record to the new place*/
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FWrite( pszRecord, psDBF->nRecordLength, 1, psDBF->fp );
|
|
}
|
|
|
|
/* free record */
|
|
free(pszRecord);
|
|
|
|
/* force update of header with new header, record length and new field */
|
|
psDBF->bNoHeader = TRUE;
|
|
DBFUpdateHeader( psDBF );
|
|
|
|
psDBF->nCurrentRecord = -1;
|
|
psDBF->bCurrentRecordModified = FALSE;
|
|
|
|
return( psDBF->nFields-1 );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadAttribute() */
|
|
/* */
|
|
/* Read one of the attribute fields of a record. */
|
|
/************************************************************************/
|
|
|
|
static void *DBFReadAttribute(DBFHandle psDBF, int hEntity, int iField,
|
|
char chReqType )
|
|
|
|
{
|
|
unsigned char *pabyRec;
|
|
void *pReturnField = NULL;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Verify selection. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity < 0 || hEntity >= psDBF->nRecords )
|
|
return( NULL );
|
|
|
|
if( iField < 0 || iField >= psDBF->nFields )
|
|
return( NULL );
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Have we read the record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, hEntity ) )
|
|
return NULL;
|
|
|
|
pabyRec = (unsigned char *) psDBF->pszCurrentRecord;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Ensure we have room to extract the target field. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( psDBF->panFieldSize[iField] >= psDBF->nWorkFieldLength )
|
|
{
|
|
psDBF->nWorkFieldLength = psDBF->panFieldSize[iField] + 100;
|
|
if( psDBF->pszWorkField == NULL )
|
|
psDBF->pszWorkField = (char *) malloc(psDBF->nWorkFieldLength);
|
|
else
|
|
psDBF->pszWorkField = (char *) realloc(psDBF->pszWorkField,
|
|
psDBF->nWorkFieldLength);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Extract the requested field. */
|
|
/* -------------------------------------------------------------------- */
|
|
strncpy( psDBF->pszWorkField,
|
|
((const char *) pabyRec) + psDBF->panFieldOffset[iField],
|
|
psDBF->panFieldSize[iField] );
|
|
psDBF->pszWorkField[psDBF->panFieldSize[iField]] = '\0';
|
|
|
|
pReturnField = psDBF->pszWorkField;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Decode the field. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( chReqType == 'N' )
|
|
{
|
|
psDBF->dfDoubleField = psDBF->sHooks.Atof(psDBF->pszWorkField);
|
|
|
|
pReturnField = &(psDBF->dfDoubleField);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Should we trim white space off the string attribute value? */
|
|
/* -------------------------------------------------------------------- */
|
|
#ifdef TRIM_DBF_WHITESPACE
|
|
else
|
|
{
|
|
char *pchSrc, *pchDst;
|
|
|
|
pchDst = pchSrc = psDBF->pszWorkField;
|
|
while( *pchSrc == ' ' )
|
|
pchSrc++;
|
|
|
|
while( *pchSrc != '\0' )
|
|
*(pchDst++) = *(pchSrc++);
|
|
*pchDst = '\0';
|
|
|
|
while( pchDst != psDBF->pszWorkField && *(--pchDst) == ' ' )
|
|
*pchDst = '\0';
|
|
}
|
|
#endif
|
|
|
|
return( pReturnField );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadIntAttribute() */
|
|
/* */
|
|
/* Read an integer attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFReadIntegerAttribute( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
double *pdValue;
|
|
|
|
pdValue = (double *) DBFReadAttribute( psDBF, iRecord, iField, 'N' );
|
|
|
|
if( pdValue == NULL )
|
|
return 0;
|
|
else
|
|
return( (int) *pdValue );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadDoubleAttribute() */
|
|
/* */
|
|
/* Read a double attribute. */
|
|
/************************************************************************/
|
|
|
|
double SHPAPI_CALL
|
|
DBFReadDoubleAttribute( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
double *pdValue;
|
|
|
|
pdValue = (double *) DBFReadAttribute( psDBF, iRecord, iField, 'N' );
|
|
|
|
if( pdValue == NULL )
|
|
return 0.0;
|
|
else
|
|
return( *pdValue );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadStringAttribute() */
|
|
/* */
|
|
/* Read a string attribute. */
|
|
/************************************************************************/
|
|
|
|
const char SHPAPI_CALL1(*)
|
|
DBFReadStringAttribute( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
return( (const char *) DBFReadAttribute( psDBF, iRecord, iField, 'C' ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadLogicalAttribute() */
|
|
/* */
|
|
/* Read a logical attribute. */
|
|
/************************************************************************/
|
|
|
|
const char SHPAPI_CALL1(*)
|
|
DBFReadLogicalAttribute( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
return( (const char *) DBFReadAttribute( psDBF, iRecord, iField, 'L' ) );
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* DBFIsValueNULL() */
|
|
/* */
|
|
/* Return TRUE if the passed string is NULL. */
|
|
/************************************************************************/
|
|
|
|
static int DBFIsValueNULL( char chType, const char* pszValue )
|
|
{
|
|
int i;
|
|
|
|
if( pszValue == NULL )
|
|
return TRUE;
|
|
|
|
switch(chType)
|
|
{
|
|
case 'N':
|
|
case 'F':
|
|
/*
|
|
** We accept all asterisks or all blanks as NULL
|
|
** though according to the spec I think it should be all
|
|
** asterisks.
|
|
*/
|
|
if( pszValue[0] == '*' )
|
|
return TRUE;
|
|
|
|
for( i = 0; pszValue[i] != '\0'; i++ )
|
|
{
|
|
if( pszValue[i] != ' ' )
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
|
|
case 'D':
|
|
/* NULL date fields have value "00000000" or blank or empty */
|
|
if (pszValue[0] == '\0' || // emtpy string
|
|
strncmp(pszValue,"00000000",8) == 0 ||
|
|
strncmp(pszValue," ",8) == 0) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
// return strncmp(pszValue,"00000000",8) == 0;
|
|
|
|
case 'L':
|
|
/* NULL boolean fields have value "?" or empty */
|
|
if (pszValue[0] == '\0' || pszValue[0] == '?') {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
|
|
default:
|
|
/* empty string fields are considered NULL */
|
|
return strlen(pszValue) == 0;
|
|
}
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFIsAttributeNULL() */
|
|
/* */
|
|
/* Return TRUE if value for field is NULL. */
|
|
/* */
|
|
/* Contributed by Jim Matthews. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFIsAttributeNULL( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
const char *pszValue;
|
|
|
|
pszValue = DBFReadStringAttribute( psDBF, iRecord, iField );
|
|
|
|
if( pszValue == NULL )
|
|
return TRUE;
|
|
|
|
return DBFIsValueNULL( psDBF->pachFieldType[iField], pszValue );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetFieldCount() */
|
|
/* */
|
|
/* Return the number of fields in this table. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFGetFieldCount( DBFHandle psDBF )
|
|
|
|
{
|
|
return( psDBF->nFields );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetRecordCount() */
|
|
/* */
|
|
/* Return the number of records in this table. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFGetRecordCount( DBFHandle psDBF )
|
|
|
|
{
|
|
return( psDBF->nRecords );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetFieldInfo() */
|
|
/* */
|
|
/* Return any requested information about the field. */
|
|
/************************************************************************/
|
|
|
|
DBFFieldType SHPAPI_CALL
|
|
DBFGetFieldInfo( DBFHandle psDBF, int iField, char * pszFieldName,
|
|
int * pnWidth, int * pnDecimals )
|
|
|
|
{
|
|
if( iField < 0 || iField >= psDBF->nFields )
|
|
return( FTInvalid );
|
|
|
|
if( pnWidth != NULL )
|
|
*pnWidth = psDBF->panFieldSize[iField];
|
|
|
|
if( pnDecimals != NULL )
|
|
*pnDecimals = psDBF->panFieldDecimals[iField];
|
|
|
|
if( pszFieldName != NULL )
|
|
{
|
|
int i;
|
|
|
|
strncpy( pszFieldName, (char *) psDBF->pszHeader+iField*32, 11 );
|
|
pszFieldName[11] = '\0';
|
|
for( i = 10; i > 0 && pszFieldName[i] == ' '; i-- )
|
|
pszFieldName[i] = '\0';
|
|
}
|
|
|
|
if ( psDBF->pachFieldType[iField] == 'L' )
|
|
return( FTLogical);
|
|
|
|
else if ( psDBF->pachFieldType[iField] == 'D' )
|
|
return ( FTDate );
|
|
|
|
else if( psDBF->pachFieldType[iField] == 'N'
|
|
|| psDBF->pachFieldType[iField] == 'F' )
|
|
{
|
|
if( psDBF->panFieldDecimals[iField] > 0
|
|
|| psDBF->panFieldSize[iField] > 10 )
|
|
return( FTDouble );
|
|
else
|
|
return( FTInteger );
|
|
}
|
|
else
|
|
{
|
|
return( FTString );
|
|
}
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteAttribute() */
|
|
/* */
|
|
/* Write an attribute record to the file. */
|
|
/************************************************************************/
|
|
|
|
static int DBFWriteAttribute(DBFHandle psDBF, int hEntity, int iField,
|
|
void * pValue )
|
|
|
|
{
|
|
int i, j, nRetResult = TRUE;
|
|
unsigned char *pabyRec;
|
|
char szSField[400], szFormat[20];
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a valid record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity < 0 || hEntity > psDBF->nRecords )
|
|
return( FALSE );
|
|
|
|
if( psDBF->bNoHeader )
|
|
DBFWriteHeader(psDBF);
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a brand new record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity == psDBF->nRecords )
|
|
{
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
psDBF->nRecords++;
|
|
for( i = 0; i < psDBF->nRecordLength; i++ )
|
|
psDBF->pszCurrentRecord[i] = ' ';
|
|
|
|
psDBF->nCurrentRecord = hEntity;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this an existing record, but different than the last one */
|
|
/* we accessed? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, hEntity ) )
|
|
return FALSE;
|
|
|
|
pabyRec = (unsigned char *) psDBF->pszCurrentRecord;
|
|
|
|
psDBF->bCurrentRecordModified = TRUE;
|
|
psDBF->bUpdated = TRUE;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Translate NULL value to valid DBF file representation. */
|
|
/* */
|
|
/* Contributed by Jim Matthews. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( pValue == NULL )
|
|
{
|
|
memset( (char *) (pabyRec+psDBF->panFieldOffset[iField]),
|
|
DBFGetNullCharacter(psDBF->pachFieldType[iField]),
|
|
psDBF->panFieldSize[iField] );
|
|
return TRUE;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Assign all the record fields. */
|
|
/* -------------------------------------------------------------------- */
|
|
switch( psDBF->pachFieldType[iField] )
|
|
{
|
|
case 'D':
|
|
case 'N':
|
|
case 'F':
|
|
if( psDBF->panFieldDecimals[iField] == 0 )
|
|
{
|
|
int nWidth = psDBF->panFieldSize[iField];
|
|
|
|
if( (int) sizeof(szSField)-2 < nWidth )
|
|
nWidth = sizeof(szSField)-2;
|
|
|
|
sprintf( szFormat, "%%%dd", nWidth );
|
|
sprintf(szSField, szFormat, (int) *((double *) pValue) );
|
|
if( (int)strlen(szSField) > psDBF->panFieldSize[iField] )
|
|
{
|
|
szSField[psDBF->panFieldSize[iField]] = '\0';
|
|
nRetResult = FALSE;
|
|
}
|
|
|
|
strncpy((char *) (pabyRec+psDBF->panFieldOffset[iField]),
|
|
szSField, strlen(szSField) );
|
|
}
|
|
else
|
|
{
|
|
int nWidth = psDBF->panFieldSize[iField];
|
|
|
|
if( (int) sizeof(szSField)-2 < nWidth )
|
|
nWidth = sizeof(szSField)-2;
|
|
|
|
sprintf( szFormat, "%%%d.%df",
|
|
nWidth, psDBF->panFieldDecimals[iField] );
|
|
sprintf(szSField, szFormat, *((double *) pValue) );
|
|
if( (int) strlen(szSField) > psDBF->panFieldSize[iField] )
|
|
{
|
|
szSField[psDBF->panFieldSize[iField]] = '\0';
|
|
nRetResult = FALSE;
|
|
}
|
|
strncpy((char *) (pabyRec+psDBF->panFieldOffset[iField]),
|
|
szSField, strlen(szSField) );
|
|
}
|
|
break;
|
|
|
|
case 'L':
|
|
if (psDBF->panFieldSize[iField] >= 1 &&
|
|
(*(char*)pValue == 'F' || *(char*)pValue == 'T'))
|
|
*(pabyRec+psDBF->panFieldOffset[iField]) = *(char*)pValue;
|
|
break;
|
|
|
|
default:
|
|
if( (int) strlen((char *) pValue) > psDBF->panFieldSize[iField] )
|
|
{
|
|
j = psDBF->panFieldSize[iField];
|
|
nRetResult = FALSE;
|
|
}
|
|
else
|
|
{
|
|
memset( pabyRec+psDBF->panFieldOffset[iField], ' ',
|
|
psDBF->panFieldSize[iField] );
|
|
j = strlen((char *) pValue);
|
|
}
|
|
|
|
strncpy((char *) (pabyRec+psDBF->panFieldOffset[iField]),
|
|
(char *) pValue, j );
|
|
break;
|
|
}
|
|
|
|
return( nRetResult );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteAttributeDirectly() */
|
|
/* */
|
|
/* Write an attribute record to the file, but without any */
|
|
/* reformatting based on type. The provided buffer is written */
|
|
/* as is to the field position in the record. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteAttributeDirectly(DBFHandle psDBF, int hEntity, int iField,
|
|
void * pValue )
|
|
|
|
{
|
|
int i, j;
|
|
unsigned char *pabyRec;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a valid record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity < 0 || hEntity > psDBF->nRecords )
|
|
return( FALSE );
|
|
|
|
if( psDBF->bNoHeader )
|
|
DBFWriteHeader(psDBF);
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a brand new record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity == psDBF->nRecords )
|
|
{
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
psDBF->nRecords++;
|
|
for( i = 0; i < psDBF->nRecordLength; i++ )
|
|
psDBF->pszCurrentRecord[i] = ' ';
|
|
|
|
psDBF->nCurrentRecord = hEntity;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this an existing record, but different than the last one */
|
|
/* we accessed? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, hEntity ) )
|
|
return FALSE;
|
|
|
|
pabyRec = (unsigned char *) psDBF->pszCurrentRecord;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Assign all the record fields. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( (int)strlen((char *) pValue) > psDBF->panFieldSize[iField] )
|
|
j = psDBF->panFieldSize[iField];
|
|
else
|
|
{
|
|
memset( pabyRec+psDBF->panFieldOffset[iField], ' ',
|
|
psDBF->panFieldSize[iField] );
|
|
j = strlen((char *) pValue);
|
|
}
|
|
|
|
strncpy((char *) (pabyRec+psDBF->panFieldOffset[iField]),
|
|
(char *) pValue, j );
|
|
|
|
psDBF->bCurrentRecordModified = TRUE;
|
|
psDBF->bUpdated = TRUE;
|
|
|
|
return( TRUE );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteDoubleAttribute() */
|
|
/* */
|
|
/* Write a double attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteDoubleAttribute( DBFHandle psDBF, int iRecord, int iField,
|
|
double dValue )
|
|
|
|
{
|
|
return( DBFWriteAttribute( psDBF, iRecord, iField, (void *) &dValue ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteIntegerAttribute() */
|
|
/* */
|
|
/* Write a integer attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteIntegerAttribute( DBFHandle psDBF, int iRecord, int iField,
|
|
int nValue )
|
|
|
|
{
|
|
double dValue = nValue;
|
|
|
|
return( DBFWriteAttribute( psDBF, iRecord, iField, (void *) &dValue ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteStringAttribute() */
|
|
/* */
|
|
/* Write a string attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteStringAttribute( DBFHandle psDBF, int iRecord, int iField,
|
|
const char * pszValue )
|
|
|
|
{
|
|
return( DBFWriteAttribute( psDBF, iRecord, iField, (void *) pszValue ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteNULLAttribute() */
|
|
/* */
|
|
/* Write a string attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteNULLAttribute( DBFHandle psDBF, int iRecord, int iField )
|
|
|
|
{
|
|
return( DBFWriteAttribute( psDBF, iRecord, iField, NULL ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteLogicalAttribute() */
|
|
/* */
|
|
/* Write a logical attribute. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteLogicalAttribute( DBFHandle psDBF, int iRecord, int iField,
|
|
const char lValue)
|
|
|
|
{
|
|
return( DBFWriteAttribute( psDBF, iRecord, iField, (void *) (&lValue) ) );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFWriteTuple() */
|
|
/* */
|
|
/* Write an attribute record to the file. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFWriteTuple(DBFHandle psDBF, int hEntity, void * pRawTuple )
|
|
|
|
{
|
|
int i;
|
|
unsigned char *pabyRec;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a valid record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity < 0 || hEntity > psDBF->nRecords )
|
|
return( FALSE );
|
|
|
|
if( psDBF->bNoHeader )
|
|
DBFWriteHeader(psDBF);
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this a brand new record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( hEntity == psDBF->nRecords )
|
|
{
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
psDBF->nRecords++;
|
|
for( i = 0; i < psDBF->nRecordLength; i++ )
|
|
psDBF->pszCurrentRecord[i] = ' ';
|
|
|
|
psDBF->nCurrentRecord = hEntity;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this an existing record, but different than the last one */
|
|
/* we accessed? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, hEntity ) )
|
|
return FALSE;
|
|
|
|
pabyRec = (unsigned char *) psDBF->pszCurrentRecord;
|
|
|
|
memcpy ( pabyRec, pRawTuple, psDBF->nRecordLength );
|
|
|
|
psDBF->bCurrentRecordModified = TRUE;
|
|
psDBF->bUpdated = TRUE;
|
|
|
|
return( TRUE );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReadTuple() */
|
|
/* */
|
|
/* Read a complete record. Note that the result is only valid */
|
|
/* till the next record read for any reason. */
|
|
/************************************************************************/
|
|
|
|
const char SHPAPI_CALL1(*)
|
|
DBFReadTuple(DBFHandle psDBF, int hEntity )
|
|
|
|
{
|
|
if( hEntity < 0 || hEntity >= psDBF->nRecords )
|
|
return( NULL );
|
|
|
|
if( !DBFLoadRecord( psDBF, hEntity ) )
|
|
return NULL;
|
|
|
|
return (const char *) psDBF->pszCurrentRecord;
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFCloneEmpty() */
|
|
/* */
|
|
/* Read one of the attribute fields of a record. */
|
|
/************************************************************************/
|
|
|
|
DBFHandle SHPAPI_CALL
|
|
DBFCloneEmpty(DBFHandle psDBF, const char * pszFilename )
|
|
{
|
|
DBFHandle newDBF;
|
|
|
|
newDBF = DBFCreateEx ( pszFilename, psDBF->pszCodePage );
|
|
if ( newDBF == NULL ) return ( NULL );
|
|
|
|
newDBF->nFields = psDBF->nFields;
|
|
newDBF->nRecordLength = psDBF->nRecordLength;
|
|
newDBF->nHeaderLength = psDBF->nHeaderLength;
|
|
|
|
newDBF->pszHeader = (char *) malloc ( newDBF->nHeaderLength );
|
|
memcpy ( newDBF->pszHeader, psDBF->pszHeader, newDBF->nHeaderLength );
|
|
|
|
newDBF->panFieldOffset = (int *) malloc ( sizeof(int) * psDBF->nFields );
|
|
memcpy ( newDBF->panFieldOffset, psDBF->panFieldOffset, sizeof(int) * psDBF->nFields );
|
|
newDBF->panFieldSize = (int *) malloc ( sizeof(int) * psDBF->nFields );
|
|
memcpy ( newDBF->panFieldSize, psDBF->panFieldSize, sizeof(int) * psDBF->nFields );
|
|
newDBF->panFieldDecimals = (int *) malloc ( sizeof(int) * psDBF->nFields );
|
|
memcpy ( newDBF->panFieldDecimals, psDBF->panFieldDecimals, sizeof(int) * psDBF->nFields );
|
|
newDBF->pachFieldType = (char *) malloc ( sizeof(char) * psDBF->nFields );
|
|
memcpy ( newDBF->pachFieldType, psDBF->pachFieldType, sizeof(char)*psDBF->nFields );
|
|
|
|
newDBF->bNoHeader = TRUE;
|
|
newDBF->bUpdated = TRUE;
|
|
|
|
DBFWriteHeader ( newDBF );
|
|
DBFClose ( newDBF );
|
|
|
|
newDBF = DBFOpen ( pszFilename, "rb+" );
|
|
|
|
return ( newDBF );
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetNativeFieldType() */
|
|
/* */
|
|
/* Return the DBase field type for the specified field. */
|
|
/* */
|
|
/* Value can be one of: 'C' (String), 'D' (Date), 'F' (Float), */
|
|
/* 'N' (Numeric, with or without decimal), */
|
|
/* 'L' (Logical), */
|
|
/* 'M' (Memo: 10 digits .DBT block ptr) */
|
|
/************************************************************************/
|
|
|
|
char SHPAPI_CALL
|
|
DBFGetNativeFieldType( DBFHandle psDBF, int iField )
|
|
|
|
{
|
|
if( iField >=0 && iField < psDBF->nFields )
|
|
return psDBF->pachFieldType[iField];
|
|
|
|
return ' ';
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* str_to_upper() */
|
|
/************************************************************************/
|
|
|
|
static void str_to_upper (char *string)
|
|
{
|
|
int len;
|
|
short i = -1;
|
|
|
|
len = strlen (string);
|
|
|
|
while (++i < len)
|
|
if (isalpha(string[i]) && islower(string[i]))
|
|
string[i] = (char) toupper ((int)string[i]);
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetFieldIndex() */
|
|
/* */
|
|
/* Get the index number for a field in a .dbf file. */
|
|
/* */
|
|
/* Contributed by Jim Matthews. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFGetFieldIndex(DBFHandle psDBF, const char *pszFieldName)
|
|
|
|
{
|
|
char name[12], name1[12], name2[12];
|
|
int i;
|
|
|
|
strncpy(name1, pszFieldName,11);
|
|
name1[11] = '\0';
|
|
str_to_upper(name1);
|
|
|
|
for( i = 0; i < DBFGetFieldCount(psDBF); i++ )
|
|
{
|
|
DBFGetFieldInfo( psDBF, i, name, NULL, NULL );
|
|
strncpy(name2,name,11);
|
|
str_to_upper(name2);
|
|
|
|
if(!strncmp(name1,name2,10))
|
|
return(i);
|
|
}
|
|
return(-1);
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFIsRecordDeleted() */
|
|
/* */
|
|
/* Returns TRUE if the indicated record is deleted, otherwise */
|
|
/* it returns FALSE. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL DBFIsRecordDeleted( DBFHandle psDBF, int iShape )
|
|
|
|
{
|
|
/* -------------------------------------------------------------------- */
|
|
/* Verify selection. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( iShape < 0 || iShape >= psDBF->nRecords )
|
|
return TRUE;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Have we read the record? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, iShape ) )
|
|
return FALSE;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* '*' means deleted. */
|
|
/* -------------------------------------------------------------------- */
|
|
return psDBF->pszCurrentRecord[0] == '*';
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFMarkRecordDeleted() */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL DBFMarkRecordDeleted( DBFHandle psDBF, int iShape,
|
|
int bIsDeleted )
|
|
|
|
{
|
|
char chNewFlag;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Verify selection. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( iShape < 0 || iShape >= psDBF->nRecords )
|
|
return FALSE;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Is this an existing record, but different than the last one */
|
|
/* we accessed? */
|
|
/* -------------------------------------------------------------------- */
|
|
if( !DBFLoadRecord( psDBF, iShape ) )
|
|
return FALSE;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Assign value, marking record as dirty if it changes. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( bIsDeleted )
|
|
chNewFlag = '*';
|
|
else
|
|
chNewFlag = ' ';
|
|
|
|
if( psDBF->pszCurrentRecord[0] != chNewFlag )
|
|
{
|
|
psDBF->bCurrentRecordModified = TRUE;
|
|
psDBF->bUpdated = TRUE;
|
|
psDBF->pszCurrentRecord[0] = chNewFlag;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFGetCodePage */
|
|
/************************************************************************/
|
|
|
|
const char SHPAPI_CALL1(*)
|
|
DBFGetCodePage(DBFHandle psDBF )
|
|
{
|
|
if( psDBF == NULL )
|
|
return NULL;
|
|
return psDBF->pszCodePage;
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFDeleteField() */
|
|
/* */
|
|
/* Remove a field from a .dbf file */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFDeleteField(DBFHandle psDBF, int iField)
|
|
{
|
|
int nOldRecordLength, nOldHeaderLength;
|
|
int nDeletedFieldOffset, nDeletedFieldSize;
|
|
SAOffset nRecordOffset;
|
|
char* pszRecord;
|
|
int i, iRecord;
|
|
|
|
if (iField < 0 || iField >= psDBF->nFields)
|
|
return FALSE;
|
|
|
|
/* make sure that everything is written in .dbf */
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
/* get information about field to be deleted */
|
|
nOldRecordLength = psDBF->nRecordLength;
|
|
nOldHeaderLength = psDBF->nHeaderLength;
|
|
nDeletedFieldOffset = psDBF->panFieldOffset[iField];
|
|
nDeletedFieldSize = psDBF->panFieldSize[iField];
|
|
|
|
/* update fields info */
|
|
for (i = iField + 1; i < psDBF->nFields; i++)
|
|
{
|
|
psDBF->panFieldOffset[i-1] = psDBF->panFieldOffset[i] - nDeletedFieldSize;
|
|
psDBF->panFieldSize[i-1] = psDBF->panFieldSize[i];
|
|
psDBF->panFieldDecimals[i-1] = psDBF->panFieldDecimals[i];
|
|
psDBF->pachFieldType[i-1] = psDBF->pachFieldType[i];
|
|
}
|
|
|
|
/* resize fields arrays */
|
|
psDBF->nFields--;
|
|
|
|
psDBF->panFieldOffset = (int *)
|
|
SfRealloc( psDBF->panFieldOffset, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->panFieldSize = (int *)
|
|
SfRealloc( psDBF->panFieldSize, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->panFieldDecimals = (int *)
|
|
SfRealloc( psDBF->panFieldDecimals, sizeof(int) * psDBF->nFields );
|
|
|
|
psDBF->pachFieldType = (char *)
|
|
SfRealloc( psDBF->pachFieldType, sizeof(char) * psDBF->nFields );
|
|
|
|
/* update header information */
|
|
psDBF->nHeaderLength -= 32;
|
|
psDBF->nRecordLength -= nDeletedFieldSize;
|
|
|
|
/* overwrite field information in header */
|
|
memmove(psDBF->pszHeader + iField*32,
|
|
psDBF->pszHeader + (iField+1)*32,
|
|
sizeof(char) * (psDBF->nFields - iField)*32);
|
|
|
|
psDBF->pszHeader = (char *) SfRealloc(psDBF->pszHeader,psDBF->nFields*32);
|
|
|
|
/* update size of current record appropriately */
|
|
psDBF->pszCurrentRecord = (char *) SfRealloc(psDBF->pszCurrentRecord,
|
|
psDBF->nRecordLength);
|
|
|
|
/* we're done if we're dealing with not yet created .dbf */
|
|
if ( psDBF->bNoHeader && psDBF->nRecords == 0 )
|
|
return TRUE;
|
|
|
|
/* force update of header with new header and record length */
|
|
psDBF->bNoHeader = TRUE;
|
|
DBFUpdateHeader( psDBF );
|
|
|
|
/* alloc record */
|
|
pszRecord = (char *) malloc(sizeof(char) * nOldRecordLength);
|
|
|
|
/* shift records to their new positions */
|
|
for (iRecord = 0; iRecord < psDBF->nRecords; iRecord++)
|
|
{
|
|
nRecordOffset =
|
|
nOldRecordLength * (SAOffset) iRecord + nOldHeaderLength;
|
|
|
|
/* load record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FRead( pszRecord, nOldRecordLength, 1, psDBF->fp );
|
|
|
|
nRecordOffset =
|
|
psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* move record in two steps */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FWrite( pszRecord, nDeletedFieldOffset, 1, psDBF->fp );
|
|
psDBF->sHooks.FWrite( pszRecord + nDeletedFieldOffset + nDeletedFieldSize,
|
|
nOldRecordLength - nDeletedFieldOffset - nDeletedFieldSize,
|
|
1, psDBF->fp );
|
|
|
|
}
|
|
|
|
/* TODO: truncate file */
|
|
|
|
/* free record */
|
|
free(pszRecord);
|
|
|
|
psDBF->nCurrentRecord = -1;
|
|
psDBF->bCurrentRecordModified = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* DBFReorderFields() */
|
|
/* */
|
|
/* Reorder the fields of a .dbf file */
|
|
/* */
|
|
/* panMap must be exactly psDBF->nFields long and be a permutation */
|
|
/* of [0, psDBF->nFields-1]. This assumption will not be asserted in the*/
|
|
/* code of DBFReorderFields. */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFReorderFields( DBFHandle psDBF, int* panMap )
|
|
{
|
|
SAOffset nRecordOffset;
|
|
int i, iRecord;
|
|
int *panFieldOffsetNew;
|
|
int *panFieldSizeNew;
|
|
int *panFieldDecimalsNew;
|
|
char *pachFieldTypeNew;
|
|
char *pszHeaderNew;
|
|
char *pszRecord;
|
|
char *pszRecordNew;
|
|
|
|
if ( psDBF->nFields == 0 )
|
|
return TRUE;
|
|
|
|
/* make sure that everything is written in .dbf */
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
panFieldOffsetNew = (int *) malloc(sizeof(int) * psDBF->nFields);
|
|
panFieldSizeNew = (int *) malloc(sizeof(int) * psDBF->nFields);
|
|
panFieldDecimalsNew = (int *) malloc(sizeof(int) * psDBF->nFields);
|
|
pachFieldTypeNew = (char *) malloc(sizeof(char) * psDBF->nFields);
|
|
pszHeaderNew = (char*) malloc(sizeof(char) * 32 * psDBF->nFields);
|
|
|
|
/* shuffle fields definitions */
|
|
for(i=0; i < psDBF->nFields; i++)
|
|
{
|
|
panFieldSizeNew[i] = psDBF->panFieldSize[panMap[i]];
|
|
panFieldDecimalsNew[i] = psDBF->panFieldDecimals[panMap[i]];
|
|
pachFieldTypeNew[i] = psDBF->pachFieldType[panMap[i]];
|
|
memcpy(pszHeaderNew + i * 32,
|
|
psDBF->pszHeader + panMap[i] * 32, 32);
|
|
}
|
|
panFieldOffsetNew[0] = 1;
|
|
for(i=1; i < psDBF->nFields; i++)
|
|
{
|
|
panFieldOffsetNew[i] = panFieldOffsetNew[i - 1] + panFieldSizeNew[i - 1];
|
|
}
|
|
|
|
free(psDBF->pszHeader);
|
|
psDBF->pszHeader = pszHeaderNew;
|
|
|
|
/* we're done if we're dealing with not yet created .dbf */
|
|
if ( !(psDBF->bNoHeader && psDBF->nRecords == 0) )
|
|
{
|
|
/* force update of header with new header and record length */
|
|
psDBF->bNoHeader = TRUE;
|
|
DBFUpdateHeader( psDBF );
|
|
|
|
/* alloc record */
|
|
pszRecord = (char *) malloc(sizeof(char) * psDBF->nRecordLength);
|
|
pszRecordNew = (char *) malloc(sizeof(char) * psDBF->nRecordLength);
|
|
|
|
/* shuffle fields in records */
|
|
for (iRecord = 0; iRecord < psDBF->nRecords; iRecord++)
|
|
{
|
|
nRecordOffset =
|
|
psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* load record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FRead( pszRecord, psDBF->nRecordLength, 1, psDBF->fp );
|
|
|
|
pszRecordNew[0] = pszRecord[0];
|
|
|
|
for(i=0; i < psDBF->nFields; i++)
|
|
{
|
|
memcpy(pszRecordNew + panFieldOffsetNew[i],
|
|
pszRecord + psDBF->panFieldOffset[panMap[i]],
|
|
psDBF->panFieldSize[panMap[i]]);
|
|
}
|
|
|
|
/* write record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FWrite( pszRecordNew, psDBF->nRecordLength, 1, psDBF->fp );
|
|
}
|
|
|
|
/* free record */
|
|
free(pszRecord);
|
|
free(pszRecordNew);
|
|
}
|
|
|
|
free(psDBF->panFieldOffset);
|
|
free(psDBF->panFieldSize);
|
|
free(psDBF->panFieldDecimals);
|
|
free(psDBF->pachFieldType);
|
|
|
|
psDBF->panFieldOffset = panFieldOffsetNew;
|
|
psDBF->panFieldSize = panFieldSizeNew;
|
|
psDBF->panFieldDecimals =panFieldDecimalsNew;
|
|
psDBF->pachFieldType = pachFieldTypeNew;
|
|
|
|
psDBF->nCurrentRecord = -1;
|
|
psDBF->bCurrentRecordModified = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/************************************************************************/
|
|
/* DBFAlterFieldDefn() */
|
|
/* */
|
|
/* Alter a field definition in a .dbf file */
|
|
/************************************************************************/
|
|
|
|
int SHPAPI_CALL
|
|
DBFAlterFieldDefn( DBFHandle psDBF, int iField, const char * pszFieldName,
|
|
char chType, int nWidth, int nDecimals )
|
|
{
|
|
int i;
|
|
int iRecord;
|
|
int nOffset;
|
|
int nOldWidth;
|
|
int nOldRecordLength;
|
|
int nRecordOffset;
|
|
char* pszFInfo;
|
|
char chOldType;
|
|
int bIsNULL;
|
|
char chFieldFill;
|
|
|
|
if (iField < 0 || iField >= psDBF->nFields)
|
|
return FALSE;
|
|
|
|
/* make sure that everything is written in .dbf */
|
|
if( !DBFFlushRecord( psDBF ) )
|
|
return FALSE;
|
|
|
|
chFieldFill = DBFGetNullCharacter(chType);
|
|
|
|
chOldType = psDBF->pachFieldType[iField];
|
|
nOffset = psDBF->panFieldOffset[iField];
|
|
nOldWidth = psDBF->panFieldSize[iField];
|
|
nOldRecordLength = psDBF->nRecordLength;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Do some checking to ensure we can add records to this file. */
|
|
/* -------------------------------------------------------------------- */
|
|
if( nWidth < 1 )
|
|
return -1;
|
|
|
|
if( nWidth > 255 )
|
|
nWidth = 255;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Assign the new field information fields. */
|
|
/* -------------------------------------------------------------------- */
|
|
psDBF->panFieldSize[iField] = nWidth;
|
|
psDBF->panFieldDecimals[iField] = nDecimals;
|
|
psDBF->pachFieldType[iField] = chType;
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Update the header information. */
|
|
/* -------------------------------------------------------------------- */
|
|
pszFInfo = psDBF->pszHeader + 32 * iField;
|
|
|
|
for( i = 0; i < 32; i++ )
|
|
pszFInfo[i] = '\0';
|
|
|
|
if( (int) strlen(pszFieldName) < 10 )
|
|
strncpy( pszFInfo, pszFieldName, strlen(pszFieldName));
|
|
else
|
|
strncpy( pszFInfo, pszFieldName, 10);
|
|
|
|
pszFInfo[11] = psDBF->pachFieldType[iField];
|
|
|
|
if( chType == 'C' )
|
|
{
|
|
pszFInfo[16] = (unsigned char) (nWidth % 256);
|
|
pszFInfo[17] = (unsigned char) (nWidth / 256);
|
|
}
|
|
else
|
|
{
|
|
pszFInfo[16] = (unsigned char) nWidth;
|
|
pszFInfo[17] = (unsigned char) nDecimals;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* Update offsets */
|
|
/* -------------------------------------------------------------------- */
|
|
if (nWidth != nOldWidth)
|
|
{
|
|
for (i = iField + 1; i < psDBF->nFields; i++)
|
|
psDBF->panFieldOffset[i] += nWidth - nOldWidth;
|
|
psDBF->nRecordLength += nWidth - nOldWidth;
|
|
|
|
psDBF->pszCurrentRecord = (char *) SfRealloc(psDBF->pszCurrentRecord,
|
|
psDBF->nRecordLength);
|
|
}
|
|
|
|
/* we're done if we're dealing with not yet created .dbf */
|
|
if ( psDBF->bNoHeader && psDBF->nRecords == 0 )
|
|
return TRUE;
|
|
|
|
/* force update of header with new header and record length */
|
|
psDBF->bNoHeader = TRUE;
|
|
DBFUpdateHeader( psDBF );
|
|
|
|
if (nWidth < nOldWidth || (nWidth == nOldWidth && chType != chOldType))
|
|
{
|
|
char* pszRecord = (char *) malloc(sizeof(char) * nOldRecordLength);
|
|
char* pszOldField = (char *) malloc(sizeof(char) * (nOldWidth + 1));
|
|
|
|
pszOldField[nOldWidth] = 0;
|
|
|
|
/* move records to their new positions */
|
|
for (iRecord = 0; iRecord < psDBF->nRecords; iRecord++)
|
|
{
|
|
nRecordOffset =
|
|
nOldRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* load record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FRead( pszRecord, nOldRecordLength, 1, psDBF->fp );
|
|
|
|
memcpy(pszOldField, pszRecord + nOffset, nOldWidth);
|
|
bIsNULL = DBFIsValueNULL( chOldType, pszOldField );
|
|
|
|
if (nWidth != nOldWidth)
|
|
{
|
|
if ((chOldType == 'N' || chOldType == 'F') && pszOldField[0] == ' ')
|
|
{
|
|
/* Strip leading spaces when truncating a numeric field */
|
|
memmove( pszRecord + nOffset,
|
|
pszRecord + nOffset + nOldWidth - nWidth,
|
|
nWidth );
|
|
}
|
|
if (nOffset + nOldWidth < nOldRecordLength)
|
|
{
|
|
memmove( pszRecord + nOffset + nWidth,
|
|
pszRecord + nOffset + nOldWidth,
|
|
nOldRecordLength - (nOffset + nOldWidth));
|
|
}
|
|
}
|
|
|
|
/* Convert null value to the appropriate value of the new type */
|
|
if (bIsNULL)
|
|
{
|
|
memset( pszRecord + nOffset, chFieldFill, nWidth);
|
|
}
|
|
|
|
nRecordOffset =
|
|
psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* write record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FWrite( pszRecord, psDBF->nRecordLength, 1, psDBF->fp );
|
|
}
|
|
|
|
free(pszRecord);
|
|
free(pszOldField);
|
|
}
|
|
else if (nWidth > nOldWidth)
|
|
{
|
|
char* pszRecord = (char *) malloc(sizeof(char) * psDBF->nRecordLength);
|
|
char* pszOldField = (char *) malloc(sizeof(char) * (nOldWidth + 1));
|
|
|
|
pszOldField[nOldWidth] = 0;
|
|
|
|
/* move records to their new positions */
|
|
for (iRecord = psDBF->nRecords - 1; iRecord >= 0; iRecord--)
|
|
{
|
|
nRecordOffset =
|
|
nOldRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* load record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FRead( pszRecord, nOldRecordLength, 1, psDBF->fp );
|
|
|
|
memcpy(pszOldField, pszRecord + nOffset, nOldWidth);
|
|
bIsNULL = DBFIsValueNULL( chOldType, pszOldField );
|
|
|
|
if (nOffset + nOldWidth < nOldRecordLength)
|
|
{
|
|
memmove( pszRecord + nOffset + nWidth,
|
|
pszRecord + nOffset + nOldWidth,
|
|
nOldRecordLength - (nOffset + nOldWidth));
|
|
}
|
|
|
|
/* Convert null value to the appropriate value of the new type */
|
|
if (bIsNULL)
|
|
{
|
|
memset( pszRecord + nOffset, chFieldFill, nWidth);
|
|
}
|
|
else
|
|
{
|
|
if ((chOldType == 'N' || chOldType == 'F'))
|
|
{
|
|
/* Add leading spaces when expanding a numeric field */
|
|
memmove( pszRecord + nOffset + nWidth - nOldWidth,
|
|
pszRecord + nOffset, nOldWidth );
|
|
memset( pszRecord + nOffset, ' ', nWidth - nOldWidth );
|
|
}
|
|
else
|
|
{
|
|
/* Add trailing spaces */
|
|
memset(pszRecord + nOffset + nOldWidth, ' ', nWidth - nOldWidth);
|
|
}
|
|
}
|
|
|
|
nRecordOffset =
|
|
psDBF->nRecordLength * (SAOffset) iRecord + psDBF->nHeaderLength;
|
|
|
|
/* write record */
|
|
psDBF->sHooks.FSeek( psDBF->fp, nRecordOffset, 0 );
|
|
psDBF->sHooks.FWrite( pszRecord, psDBF->nRecordLength, 1, psDBF->fp );
|
|
}
|
|
|
|
free(pszRecord);
|
|
free(pszOldField);
|
|
}
|
|
|
|
psDBF->nCurrentRecord = -1;
|
|
psDBF->bCurrentRecordModified = FALSE;
|
|
|
|
return TRUE;
|
|
}
|