double_from_wkb_state()

static double double_from_wkb_state ( wkb_parse_state *  s )

static

Double Read an 8-byte double and advance the parse state forward.

Definition at line 305 of file lwin_wkb.c.

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

References s, WKB_DOUBLE_SIZE, and wkb_parse_state_check().

Referenced by lwpoint_from_wkb_state(), and ptarray_from_wkb_state().

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