/* struct::stack - critcl - layer 0 declarations
 * API general utilities
 */

#ifndef _UTIL_H
#define _UTIL_H 1

#include <tcl.h>

/* Allocation macros for common situations.
 */

#define ALLOC(type)    (type *) ckalloc (sizeof (type))
#define NALLOC(n,type) (type *) ckalloc ((n) * sizeof (type))

/* Assertions in general, and asserting the proper range of an array index.
 */

#undef  STACK_DEBUG
#define STACK_DEBUG 1

#ifdef STACK_DEBUG
#define XSTR(x) #x
#define STR(x) XSTR(x)
#define RANGEOK(i,n) ((0 <= (i)) && (i < (n)))
#define ASSERT(x,msg) if (!(x)) { Tcl_Panic (msg " (" #x "), in file " __FILE__ " @line " STR(__LINE__));}
#define ASSERT_BOUNDS(i,n) ASSERT (RANGEOK(i,n),"array index out of bounds: " STR(i) " > " STR(n))
#else
#define ASSERT(x,msg)
#define ASSERT_BOUNDS(i,n)
#endif

#endif /* _UTIL_H */

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */
