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trace
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1992-02-09
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2KB
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57 lines
(* Title : trace.h
* Purpose: centralised control for trace/debug output
*
*)
#ifndef __trace_h
#define __trace_h
(* This flag says if tracing is compiled in. It should be used in
conditional compilation statements around all tracing code. *)
#ifdef TRACE
(* ------------------------------- tracef -------------------------------
* Description: Outputs tracing info.
*
* Parameters: char* -- printf-style format string
* ... -- variable argument list
* Returns: void.
* Other Info: called by tracef0,tracef1 etc.
*
*)
procedure tracef(fmt : string, ..); extern;
#define tracef0 tracef
#define tracef1 tracef
#define tracef2 tracef
#define tracef3 tracef
#define tracef4 tracef
(* These forms can occur outside conditional compilation clauses:
they will produce no code if TRACE is not set. *)
function trace_is_on : boolean; extern;
(* returns true if tracing turned on *)
procedure trace_on; extern; (* turns tracing on *)
procedure trace_off; extern; (* turns tracing off *)
#else
(* No-trace versions *)
(* tracef itself cannot be done as a macro. *)
procedure tracef(fmt : string; ..); extern;
#define tracef0(a) ((void) 0)
#define tracef1(a,b) ((void) 0)
#define tracef2(a,b,c) ((void) 0)
#define tracef3(a,b,c,d) ((void) 0)
#define tracef4(a,b,c,d,e) ((void) 0)
#define trace_is_on() 0
#define trace_on() ((void) 0)
#define trace_off() ((void) 0)
#endif
#endif
(* end trace.h *)