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// Written by Cyan Ogilvie, and placed in the public domain
#ifndef _TCLSTUFF_H
#define _TCLSTUFF_H
#include <tcl.h>
#define NEW_CMD( tcl_cmd, c_cmd ) \
Tcl_CreateObjCommand( interp, tcl_cmd, \
(Tcl_ObjCmdProc *) c_cmd, \
(ClientData *) NULL, NULL );
#define THROW_ERROR( ... ) \
{ \
Tcl_AppendResult(interp, ##__VA_ARGS__, NULL); \
return TCL_ERROR; \
}
#define THROW_PRINTF( fmtstr, ... ) \
{ \
Tcl_SetObjResult(interp, Tcl_ObjPrintf((fmtstr), ##__VA_ARGS__)); \
return TCL_ERROR; \
}
#define THROW_ERROR_LABEL( label, var, ... ) \
{ \
Tcl_AppendResult(interp, ##__VA_ARGS__, NULL); \
var = TCL_ERROR; \
goto label; \
}
#define THROW_PRINTF_LABEL( label, var, fmtstr, ... ) \
{ \
Tcl_SetObjResult(interp, Tcl_ObjPrintf((fmtstr), ##__VA_ARGS__)); \
var = TCL_ERROR; \
goto label; \
}
#define THROW_POSIX_LABEL(label, code, msg) do { \
int err = Tcl_GetErrno(); \
const char* errstr = Tcl_ErrnoId(); \
Tcl_SetErrorCode(interp, "POSIX", errstr, Tcl_ErrnoMsg(err), NULL); \
THROW_PRINTF_LABEL(label, code, "%s: %s %s", msg, errstr, Tcl_ErrnoMsg(err)); \
} while(0);
// convenience macro to check the number of arguments passed to a function
// implementing a tcl command against the number expected, and to throw
// a tcl error if they don't match. Note that the value of expected does
// not include the objv[0] object (the function itself)
#define CHECK_ARGS(expected, msg) \
if (objc != expected + 1) { \
Tcl_WrongNumArgs(interp, 1, objv, msg); \
return TCL_ERROR; \
}
#define CHECK_ARGS_LABEL(label, rc, msg) \
do { \
if (objc != A_objc) { \
Tcl_WrongNumArgs(interp, A_cmd+1, objv, msg); \
rc = TCL_ERROR; \
goto label; \
} \
} while(0);
#define CHECK_MIN_ARGS_LABEL(label, rc, msg) \
do { \
if (objc < A_args) { \
Tcl_WrongNumArgs(interp, A_cmd+1, objv, msg); \
rc = TCL_ERROR; \
goto label; \
} \
} while(0);
// A rather frivolous macro that just enhances readability for a common case
#define TEST_OK( cmd ) \
if (cmd != TCL_OK) return TCL_ERROR;
#define TEST_OK_LABEL( label, var, cmd ) \
if (cmd != TCL_OK) { \
var = TCL_ERROR; \
goto label; \
}
#define TEST_OK_BREAK(var, cmd) if (TCL_OK != (var=(cmd))) break;
static inline void release_tclobj(Tcl_Obj** obj)
{
if (*obj) {
Tcl_DecrRefCount(*obj);
*obj = NULL;
}
}
#define RELEASE_MACRO(obj) if (obj) {Tcl_DecrRefCount(obj); obj=NULL;}
#define REPLACE_MACRO(target, replacement) \
{ \
release_tclobj(&target); \
if (replacement) Tcl_IncrRefCount(target = replacement); \
}
static inline void replace_tclobj(Tcl_Obj** target, Tcl_Obj* replacement)
{
Tcl_Obj* old = *target;
#if DEBUG
if (*target && (*target)->refCount <= 0) Tcl_Panic("replace_tclobj target exists but has refcount <= 0: %d", (*target)->refCount);
#endif
*target = replacement;
if (*target) Tcl_IncrRefCount(*target);
if (old) {
Tcl_DecrRefCount(old);
old = NULL;
}
}
#if DEBUG
# include <signal.h>
# include <unistd.h>
# include <time.h>
# include "names.h"
# define DBG(...) fprintf(stdout, ##__VA_ARGS__)
# define FDBG(...) fprintf(stdout, ##__VA_ARGS__)
# define DEBUGGER raise(SIGTRAP)
# define TIME(label, task) \
do { \
struct timespec first; \
struct timespec second; \
struct timespec after; \
double empty; \
double delta; \
clock_gettime(CLOCK_MONOTONIC, &first); /* Warm up the call */ \
clock_gettime(CLOCK_MONOTONIC, &first); \
clock_gettime(CLOCK_MONOTONIC, &second); \
task; \
clock_gettime(CLOCK_MONOTONIC, &after); \
empty = second.tv_sec - first.tv_sec + (second.tv_nsec - first.tv_nsec)/1e9; \
delta = after.tv_sec - second.tv_sec + (after.tv_nsec - second.tv_nsec)/1e9 - empty; \
DBG("Time for %s: %.1f microseconds\n", label, delta * 1e6); \
} while(0)
#else
# define DBG(...) /* nop */
# define FDBG(...) /* nop */
# define DEBUGGER /* nop */
# define TIME(label, task) task
#endif
#define OBJCMD(name) int (name)(ClientData cdata, Tcl_Interp* interp, int objc, Tcl_Obj *const objv[])
#define INIT int init(Tcl_Interp* interp)
#define RELEASE void release(Tcl_Interp* interp)
#endif
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