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/*
*
* WKTRaster - Raster Types for PostGIS
* http://trac.osgeo.org/postgis/wiki/WKTRaster
*
* Copyright (C) 2011-2013 Regents of the University of California
* <bkpark@ucdavis.edu>
* Copyright (C) 2010-2011 Jorge Arevalo <jorge.arevalo@deimos-space.com>
* Copyright (C) 2010-2011 David Zwarg <dzwarg@azavea.com>
* Copyright (C) 2009-2011 Pierre Racine <pierre.racine@sbf.ulaval.ca>
* Copyright (C) 2009-2011 Mateusz Loskot <mateusz@loskot.net>
* Copyright (C) 2008-2009 Sandro Santilli <strk@kbt.io>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <postgres.h> /* for palloc */
#include <fmgr.h>
#include <utils/builtins.h>
#include "../../postgis_config.h"
#include "lwgeom_pg.h"
#include "rtpostgis.h"
Datum RASTER_lib_version(PG_FUNCTION_ARGS);
Datum RASTER_lib_build_date(PG_FUNCTION_ARGS);
Datum RASTER_gdal_version(PG_FUNCTION_ARGS);
Datum RASTER_minPossibleValue(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(RASTER_lib_version);
Datum RASTER_lib_version(PG_FUNCTION_ARGS)
{
char ver[64];
text *result;
snprintf(ver, 64, "%s r%d", POSTGIS_LIB_VERSION, POSTGIS_SVN_REVISION);
ver[63] = '\0';
result = cstring2text(ver);
PG_RETURN_TEXT_P(result);
}
PG_FUNCTION_INFO_V1(RASTER_lib_build_date);
Datum RASTER_lib_build_date(PG_FUNCTION_ARGS)
{
char *ver = POSTGIS_BUILD_DATE;
text *result;
result = palloc(VARHDRSZ + strlen(ver));
SET_VARSIZE(result, VARHDRSZ + strlen(ver));
memcpy(VARDATA(result), ver, strlen(ver));
PG_RETURN_POINTER(result);
}
PG_FUNCTION_INFO_V1(RASTER_gdal_version);
Datum RASTER_gdal_version(PG_FUNCTION_ARGS)
{
const char *ver = rt_util_gdal_version("--version");
text *result;
/* add indicator if GDAL isn't configured right */
if (!rt_util_gdal_configured()) {
char *rtn = NULL;
rtn = palloc(strlen(ver) + strlen(" GDAL_DATA not found") + 1);
if (!rtn)
result = cstring2text(ver);
else {
sprintf(rtn, "%s GDAL_DATA not found", ver);
result = cstring2text(rtn);
pfree(rtn);
}
}
else
result = cstring2text(ver);
PG_RETURN_POINTER(result);
}
PG_FUNCTION_INFO_V1(RASTER_minPossibleValue);
Datum RASTER_minPossibleValue(PG_FUNCTION_ARGS)
{
text *pixeltypetext = NULL;
char *pixeltypechar = NULL;
rt_pixtype pixtype = PT_END;
double pixsize = 0;
if (PG_ARGISNULL(0))
PG_RETURN_NULL();
pixeltypetext = PG_GETARG_TEXT_P(0);
pixeltypechar = text_to_cstring(pixeltypetext);
pixtype = rt_pixtype_index_from_name(pixeltypechar);
if (pixtype == PT_END) {
elog(ERROR, "RASTER_minPossibleValue: Invalid pixel type: %s", pixeltypechar);
PG_RETURN_NULL();
}
pixsize = rt_pixtype_get_min_value(pixtype);
/*
correct pixsize of unsigned pixel types
example: for PT_8BUI, the value is CHAR_MIN but if char is signed,
the value returned is -127 instead of 0.
*/
switch (pixtype) {
case PT_1BB:
case PT_2BUI:
case PT_4BUI:
case PT_8BUI:
case PT_16BUI:
case PT_32BUI:
pixsize = 0;
break;
default:
break;
}
PG_RETURN_FLOAT8(pixsize);
}
/** find the detoasted size of a value */
Datum RASTER_memsize(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(RASTER_memsize);
Datum RASTER_memsize(PG_FUNCTION_ARGS)
{
void *detoasted = PG_DETOAST_DATUM(PG_GETARG_DATUM(0));
size_t size = VARSIZE(detoasted);
PG_FREE_IF_COPY(detoasted,0);
PG_RETURN_INT32(size);
}
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