integer_from_wkb_state()

static uint32_t integer_from_wkb_state ( wkb_parse_state *  s )

static

Int32 Read 4-byte integer and advance the parse state forward.

Definition at line 278 of file lwin_wkb.c.

{
        uint32_t i = 0;
 
        wkb_parse_state_check(s, WKB_INT_SIZE);
        if (s->error)
                return 0;
 
        memcpy(&i, s->pos, WKB_INT_SIZE);
 
        /* Swap? Copy into a stack-allocated integer. */
        if( s->swap_bytes )
        {
                int j = 0;
                uint8_t tmp;
 
                for( j = 0; j < WKB_INT_SIZE/2; j++ )
                {
                        tmp = ((uint8_t*)(&i))[j];
                        ((uint8_t*)(&i))[j] = ((uint8_t*)(&i))[WKB_INT_SIZE - j - 1];
                        ((uint8_t*)(&i))[WKB_INT_SIZE - j - 1] = tmp;
                }
        }
 
        s->pos += WKB_INT_SIZE;
        return i;
}

References s, WKB_INT_SIZE, and wkb_parse_state_check().

Referenced by lwcollection_from_wkb_state(), lwcurvepoly_from_wkb_state(), lwgeom_from_wkb_state(), lwpoly_from_wkb_state(), lwtriangle_from_wkb_state(), and ptarray_from_wkb_state().

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