Align internal shapelib with official shapelib

[hopfgartner]

Internal shapelib files are significantly older then teh current official version. Internal version has deficienncies handling different code pages and misses many other enhancements and fixes.

[hopfgartner]

The attached files come from current shapelib CVS version.

Furthermore I copied the support for dates the functions DBFReadSetup and DBFReadDeleted from the PostGIS shapelib version.

I applied the fix for http://trac.osgeo.org/postgis/ticket/105, too.

Some warnings are generated during compilation, since shapelib uses the type SAFile.

[pramsey]

Right, we aim to have code that emits no warnings at all. I had a look and consulting Frank Warmerdam on this and he pointed out that the dbfopen.c file you have included does not seem to match correctly to the safileio.c mechanisms. That is, calls to fseek(), fread(), etc, in dbfopen.c should actually be calls to psHooks->FSeek(), etc. Your shpopen.c files *does* seem to use the hooks mechanisms, so it seems like you are using an old dbfopen.c and a new shpopen.c file. Could you take another run at this?

[hopfgartner]

Oh, I've pushed the files from the wrong directory, sorry.

This dbfopen.2.c should do the job. Here, it compiles fine and running it on a couple of shapes gave no problem at all.

Peter

[pramsey]

Thanks for the clean-up. Builds clean and regression passes. Applied to 1.5 at r5957 and to trunk at r5959.