dig_macros.h

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/*!
   \file include/grass/vect/dig_macros.h
 
   \brief Macros for diglib (part of vector library
 */
 
/* ALIVE MACROS take a pointer of the structure in question */
/*  and return 0 or non-zero */
#define LINE_ALIVE(p)   ((p)->type < 16) /* assume DEAD are .GT. 1 << 3 */
#define NODE_ALIVE(p)   ((p)->alive) /* simple enuf                         */
#define AREA_LABELED(p) ((p)->alive && (p)->att)
#define LINE_LABELED(p) (LINE_ALIVE(p) && (p)->att)
#define AREA_ALIVE(p)   ((p)->alive)
#define ISLE_ALIVE(p)   ((p)->alive)
#define ATT_ALIVE(p)    ((p)->type < 16) /* see LINE_ALIVE */
 
#define LESSER(x, y)    ((x) < (y) ? (x) : (y))
#define GREATER(x, y)   ((x) > (y) ? (x) : (y))