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