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authorescoffon <escoffon>1998-10-05 22:32:09 (GMT)
committerescoffon <escoffon>1998-10-05 22:32:09 (GMT)
commit7a0266fc2a385695a20d43579b3c6951495a3b21 (patch)
treef25db388c40788f11cbe13b90d87726976d7607e /generic/tclTestProcBodyObj.c
parent96be4fa0ab6cb9a0ef8b91883cb51e120e857cde (diff)
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Added a new Tcl object called "procbody"; this object's internal
representation contains both a Proc struct and its associated ByteCode. Updated tclProc.c::TclCreateProc to take procbody instances as the body argument, for future support of compiler extensions. Added the "procbodytest" package for testing all this stuff.
Diffstat (limited to 'generic/tclTestProcBodyObj.c')
-rw-r--r--generic/tclTestProcBodyObj.c317
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diff --git a/generic/tclTestProcBodyObj.c b/generic/tclTestProcBodyObj.c
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+/*
+ * tclTestProcBodyObj.c --
+ *
+ * Implements the "procbodytest" package, which contains commands
+ * to test creation of Tcl procedures whose body argument is a
+ * Tcl_Obj of type "procbody" rather than a string.
+ *
+ * Copyright (c) 1998 by Scriptics Corporation.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * RCS: @(#) $Id: tclTestProcBodyObj.c,v 1.1 1998/10/05 22:32:10 escoffon Exp $
+ */
+
+#include "tclInt.h"
+
+/*
+ * name and version of this package
+ */
+
+static char packageName[] = "procbodytest";
+static char packageVersion[] = "1.0";
+
+/*
+ * Name of the commands exported by this package
+ */
+
+static char procCommand[] = "proc";
+
+/*
+ * this struct describes an entry in the table of command names and command
+ * procs
+ */
+
+typedef struct CmdTable
+{
+ char *cmdName; /* command name */
+ Tcl_ObjCmdProc *proc; /* command proc */
+ int exportIt; /* if 1, export the command */
+} CmdTable;
+
+/*
+ * Declarations for functions defined in this file.
+ */
+
+static int ProcBodyTestProcObjCmd _ANSI_ARGS_((ClientData dummy,
+ Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[]));
+static int ProcBodyTestInitInternal _ANSI_ARGS_((Tcl_Interp *interp,
+ int isSafe));
+static int RegisterCommand _ANSI_ARGS_((Tcl_Interp* interp,
+ char *namespace, CONST CmdTable *cmdTablePtr));
+
+/*
+ * List of commands to create when the package is loaded; must go after the
+ * declarations of the enable command procedure.
+ */
+
+static CONST CmdTable commands[] =
+{
+ { procCommand, ProcBodyTestProcObjCmd, 1 },
+
+ { 0, 0, 0 }
+};
+
+static CONST CmdTable safeCommands[] =
+{
+ { procCommand, ProcBodyTestProcObjCmd, 1 },
+
+ { 0, 0, 0 }
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Procbodytest_Init --
+ *
+ * This procedure initializes the "procbodytest" package.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Procbodytest_Init(interp)
+ Tcl_Interp *interp; /* the Tcl interpreter for which the package
+ * is initialized */
+{
+ return ProcBodyTestInitInternal(interp, 0);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Procbodytest_SafeInit --
+ *
+ * This procedure initializes the "procbodytest" package.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Procbodytest_SafeInit(interp)
+ Tcl_Interp *interp; /* the Tcl interpreter for which the package
+ * is initialized */
+{
+ return ProcBodyTestInitInternal(interp, 1);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * RegisterCommand --
+ *
+ * This procedure registers a command in the context of the given namespace.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int RegisterCommand(interp, namespace, cmdTablePtr)
+ Tcl_Interp* interp; /* the Tcl interpreter for which the
+ * operation is performed */
+ char *namespace; /* the namespace in which the command
+ * is registered */
+ CONST CmdTable *cmdTablePtr; /* the command to register */
+{
+ char buf[128];
+
+ if (cmdTablePtr->exportIt) {
+ sprintf(buf, "namespace eval %s { namespace export %s }",
+ namespace, cmdTablePtr->cmdName);
+ if (Tcl_Eval(interp, buf) != TCL_OK)
+ return TCL_ERROR;
+ }
+
+ sprintf(buf, "%s::%s", namespace, cmdTablePtr->cmdName);
+ Tcl_CreateObjCommand(interp, buf, cmdTablePtr->proc, 0, 0);
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ProcBodyTestInitInternal --
+ *
+ * This procedure initializes the Loader package.
+ * The isSafe flag is 1 if the interpreter is safe, 0 otherwise.
+ *
+ * Results:
+ * A standard Tcl result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ProcBodyTestInitInternal(interp, isSafe)
+ Tcl_Interp *interp; /* the Tcl interpreter for which the package
+ * is initialized */
+ int isSafe; /* 1 if this is a safe interpreter */
+{
+ CONST CmdTable *cmdTablePtr;
+
+ cmdTablePtr = (isSafe) ? &safeCommands[0] : &commands[0];
+ for ( ; cmdTablePtr->cmdName ; cmdTablePtr++) {
+ if (RegisterCommand(interp, packageName, cmdTablePtr) != TCL_OK) {
+ return TCL_ERROR;
+ }
+ }
+
+ return Tcl_PkgProvide(interp, packageName, packageVersion);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ProcBodyTestProcObjCmd --
+ *
+ * Implements the "procbodytest::proc" command. Here is the command
+ * description:
+ * procbodytest::proc newName argList bodyName
+ * Looks up a procedure called $bodyName and, if the procedure exists,
+ * constructs a Tcl_Obj of type "procbody" and calls Tcl_ProcObjCmd.
+ * Arguments:
+ * newName the name of the procedure to be created
+ * argList the argument list for the procedure
+ * bodyName the name of an existing procedure from which the
+ * body is to be copied.
+ * This command can be used to trigger the branches in Tcl_ProcObjCmd that
+ * construct a proc from a "procbody", for example:
+ * proc a {x} {return $x}
+ * a 123
+ * procbodytest::proc b {x} a
+ * Note the call to "a 123", which is necessary so that the Proc pointer
+ * for "a" is filled in by the internal compiler; this is a hack.
+ *
+ * Results:
+ * Returns a standard Tcl code.
+ *
+ * Side effects:
+ * A new procedure is created.
+ * Leaves an error message in the interp's result on error.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+ProcBodyTestProcObjCmd (dummy, interp, objc, objv)
+ ClientData dummy; /* context; not used */
+ Tcl_Interp *interp; /* the current interpreter */
+ int objc; /* argument count */
+ Tcl_Obj *CONST objv[]; /* arguments */
+{
+ char *fullName;
+ Tcl_Command procCmd;
+ Command *cmdPtr;
+ Proc *procPtr = (Proc *) NULL;
+ Tcl_Obj *bodyObjPtr;
+ Tcl_Obj *myobjv[5];
+ int result;
+
+ if (objc != 4) {
+ Tcl_WrongNumArgs(interp, 1, objv, "newName argsList bodyName");
+ return TCL_ERROR;
+ }
+
+ /*
+ * Find the Command pointer to this procedure
+ */
+
+ fullName = Tcl_GetStringFromObj(objv[3], (int *) NULL);
+ procCmd = Tcl_FindCommand(interp, fullName, (Tcl_Namespace *) NULL,
+ TCL_LEAVE_ERR_MSG);
+ if (procCmd == NULL) {
+ return TCL_ERROR;
+ }
+
+ cmdPtr = (Command *) procCmd;
+
+ /*
+ * check that this is a procedure and not a builtin command:
+ * If a procedure, cmdPtr->objProc is either 0 or TclObjInterpProc,
+ * and cmdPtr->proc is either 0 or TclProcInterpProc.
+ * Also, the compile proc should be 0, but we don't check for that.
+ */
+
+ if (((cmdPtr->objProc != NULL)
+ && (cmdPtr->objProc != TclGetObjInterpProc()))
+ || ((cmdPtr->proc != NULL)
+ && (cmdPtr->proc != TclGetInterpProc()))) {
+ Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+ "command \"", fullName,
+ "\" is not a Tcl procedure", (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ /*
+ * it is a Tcl procedure: the client data is the Proc structure
+ */
+
+ if (cmdPtr->objProc != NULL) {
+ procPtr = (Proc *) cmdPtr->objClientData;
+ } else if (cmdPtr->proc != NULL) {
+ procPtr = (Proc *) cmdPtr->clientData;
+ }
+
+ if (procPtr == NULL) {
+ Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+ "procedure \"", fullName,
+ "\" does not have a Proc struct!", (char *) NULL);
+ return TCL_ERROR;
+ }
+
+ /*
+ * create a new object, initialize our argument vector, call into Tcl
+ */
+
+ bodyObjPtr = TclNewProcBodyObj(procPtr);
+ if (bodyObjPtr == NULL) {
+ Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
+ "failed to create a procbody object for procedure \"",
+ fullName, "\"", (char *) NULL);
+ return TCL_ERROR;
+ }
+ Tcl_IncrRefCount(bodyObjPtr);
+
+ myobjv[0] = objv[0];
+ myobjv[1] = objv[1];
+ myobjv[2] = objv[2];
+ myobjv[3] = bodyObjPtr;
+ myobjv[4] = (Tcl_Obj *) NULL;
+
+ result = Tcl_ProcObjCmd((ClientData) NULL, interp, objc, myobjv);
+ Tcl_DecrRefCount(bodyObjPtr);
+
+ return result;
+}