rt_raster_from_hexwkb()

rt_raster rt_raster_from_hexwkb	(	const char *	hexwkb,
		uint32_t	hexwkbsize
	)

Construct an rt_raster from a text HEXWKB representation.

Parameters

hexwkb	: an hex-encoded stream
hexwkbsize	: size (in bytes) of the hexwkb stream

Returns

an rt_raster or NULL on error (out of memory or malformed WKB).

Definition at line 406 of file rt_wkb.c.

References parse_hex(), RASTER_DEBUGF, rt_raster_from_wkb(), rtalloc(), rtdealloc(), and rterror().

Referenced by RASTER_in(), and test_raster_wkb().

                                                               {
        rt_raster ret = NULL;
        uint8_t* wkb = NULL;
        uint32_t wkbsize = 0;
        uint32_t i = 0;

        assert(NULL != hexwkb);

        RASTER_DEBUGF(3, "input wkb: %s", hexwkb);
        RASTER_DEBUGF(3, "input wkbsize: %d", hexwkbsize);

        if (hexwkbsize % 2) {
                rterror("rt_raster_from_hexwkb: Raster HEXWKB input must have an even number of characters");
                return NULL;
        }
        wkbsize = hexwkbsize / 2;

        wkb = rtalloc(wkbsize);
        if (!wkb) {
                rterror("rt_raster_from_hexwkb: Out of memory allocating memory for decoding HEXWKB");
                return NULL;
        }

        /* parse full hex */
        for (i = 0; i < wkbsize; ++i) {
                wkb[i] = parse_hex((char*) & (hexwkb[i * 2]));
        }

        ret = rt_raster_from_wkb(wkb, wkbsize);
        rtdealloc(wkb); /* as long as rt_raster_from_wkb copies memory */

        return ret;
}

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