dbg_cmd.c

Linux下的tcl语言调试器

/* Dbg_cmd.c - Tcl Debugger default command, used if app writer wants a
			   quick and reasonable default.

Written by: Don Libes, NIST, 3/23/93

Design and implementation of this program was paid for by U.S. tax
dollars.  Therefore it is public domain.  However, the author and NIST
would appreciate credit if this program or parts of it are used.

*/

#include "tclInt.h"
#include "tcldbg.h"

char *Dbg_DefaultCmdName = "debug";

/*ARGSUSED*/
static int
App_DebugCmd(clientData, interp, argc, argv)
ClientData clientData;
Tcl_Interp *interp;
int argc;
char **argv;
{
	int now = 0;	/* soon if 0, now if 1 */

	if (argc > 3) goto usage;

	argv++;

	while (*argv) {
		if (0 == strcmp(*argv,"-now")) {
			now = 1;
			argv++;
		}
		else break;
	}

	if (!*argv) {
		if (now) {
			Dbg_On(interp,1);
		} else {
			goto usage;
		}
	} else if (0 == strcmp(*argv,"0")) {
		Dbg_Off(interp);
	} else {
		Dbg_On(interp,now);
	}

	return(TCL_OK);
 usage:
	interp->result = "usage: [[-now] 1|0]";
	return TCL_ERROR;
}

/* Tcl's load command looks for this by default due to the name of
   the library.*/
int
Tcldbg_Init(interp)
Tcl_Interp *interp;
{
	if (Tcl_PkgRequire(interp, "Tcl", TCL_VERSION, 0) == NULL) {
		return TCL_ERROR;
	}
	if (Tcl_PkgProvide(interp, "Dbg", DBG_VERSION) != TCL_OK) {
		return TCL_ERROR;
	}

	Tcl_CreateCommand(interp,Dbg_DefaultCmdName,App_DebugCmd,
			(ClientData)0,(void (*)())0);
	return TCL_OK;	
}