+++ /dev/null
-/*
- * tclMain.c --
- *
- * Main program for Tcl shells and other Tcl-based applications.
- * This file contains a generic main program for Tcl shells and other
- * Tcl-based applications. It can be used as-is for many applications,
- * just by supplying a different appInitProc function for each specific
- * application. Or, it can be used as a template for creating new main
- * programs for Tcl applications.
- *
- * Copyright (c) 1988-1994 The Regents of the University of California.
- * Copyright (c) 1994-1997 Sun Microsystems, Inc.
- * Copyright (c) 2000 Ajuba Solutions.
- *
- * See the file "license.terms" for information on usage and redistribution of
- * this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-/*
- * On Windows, this file needs to be compiled twice, once with TCL_ASCII_MAIN
- * defined. This way both Tcl_Main and Tcl_MainExW can be implemented, sharing
- * the same source code.
- */
-
-#if defined(TCL_ASCII_MAIN)
-# ifdef UNICODE
-# undef UNICODE
-# undef _UNICODE
-# else
-# define UNICODE
-# define _UNICODE
-# endif
-#endif
-
-#include "tclInt.h"
-
-/*
- * The default prompt used when the user has not overridden it.
- */
-
-#define DEFAULT_PRIMARY_PROMPT "% "
-
-/*
- * This file can be compiled on Windows in UNICODE mode, as well as on all
- * other platforms using the native encoding. This is done by using the normal
- * Windows functions like _tcscmp, but on platforms which don't have <tchar.h>
- * we have to translate that to strcmp here.
- */
-
-#ifndef _WIN32
-# define TCHAR char
-# define TEXT(arg) arg
-# define _tcscmp strcmp
-#endif
-
-/*
- * Further on, in UNICODE mode we just use Tcl_NewUnicodeObj, otherwise
- * NewNativeObj is needed (which provides proper conversion from native
- * encoding to UTF-8).
- */
-
-#ifdef UNICODE
-# define NewNativeObj Tcl_NewUnicodeObj
-#else /* !UNICODE */
-static inline Tcl_Obj *
-NewNativeObj(
- char *string,
- int length)
-{
- Tcl_DString ds;
-
- Tcl_ExternalToUtfDString(NULL, string, length, &ds);
- return TclDStringToObj(&ds);
-}
-#endif /* !UNICODE */
-
-/*
- * Declarations for various library functions and variables (don't want to
- * include tclPort.h here, because people might copy this file out of the Tcl
- * source directory to make their own modified versions).
- */
-
-extern CRTIMPORT int isatty(int fd);
-
-/*
- * The thread-local variables for this file's functions.
- */
-
-typedef struct {
- Tcl_Obj *path; /* The filename of the script for *_Main()
- * routines to [source] as a startup script,
- * or NULL for none set, meaning enter
- * interactive mode. */
- Tcl_Obj *encoding; /* The encoding of the startup script file. */
- Tcl_MainLoopProc *mainLoopProc;
- /* Any installed main loop handler. The main
- * extension that installs these is Tk. */
-} ThreadSpecificData;
-
-/*
- * Structure definition for information used to keep the state of an
- * interactive command processor that reads lines from standard input and
- * writes prompts and results to standard output.
- */
-
-typedef enum {
- PROMPT_NONE, /* Print no prompt */
- PROMPT_START, /* Print prompt for command start */
- PROMPT_CONTINUE /* Print prompt for command continuation */
-} PromptType;
-
-typedef struct InteractiveState {
- Tcl_Channel input; /* The standard input channel from which lines
- * are read. */
- int tty; /* Non-zero means standard input is a
- * terminal-like device. Zero means it's a
- * file. */
- Tcl_Obj *commandPtr; /* Used to assemble lines of input into Tcl
- * commands. */
- PromptType prompt; /* Next prompt to print */
- Tcl_Interp *interp; /* Interpreter that evaluates interactive
- * commands. */
-} InteractiveState;
-
-/*
- * Forward declarations for functions defined later in this file.
- */
-
-MODULE_SCOPE Tcl_MainLoopProc *TclGetMainLoop(void);
-static void Prompt(Tcl_Interp *interp, InteractiveState *isPtr);
-static void StdinProc(ClientData clientData, int mask);
-static void FreeMainInterp(ClientData clientData);
-\f
-#ifndef TCL_ASCII_MAIN
-static Tcl_ThreadDataKey dataKey;
-
-/*
- *----------------------------------------------------------------------
- *
- * Tcl_SetStartupScript --
- *
- * Sets the path and encoding of the startup script to be evaluated by
- * Tcl_Main, used to override the command line processing.
- *
- * Results:
- * None.
- *
- * Side effects:
- *
- *----------------------------------------------------------------------
- */
-
-void
-Tcl_SetStartupScript(
- Tcl_Obj *path, /* Filesystem path of startup script file */
- const char *encoding) /* Encoding of the data in that file */
-{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- Tcl_Obj *newEncoding = NULL;
-
- if (encoding != NULL) {
- newEncoding = Tcl_NewStringObj(encoding, -1);
- }
-
- if (tsdPtr->path != NULL) {
- Tcl_DecrRefCount(tsdPtr->path);
- }
- tsdPtr->path = path;
- if (tsdPtr->path != NULL) {
- Tcl_IncrRefCount(tsdPtr->path);
- }
-
- if (tsdPtr->encoding != NULL) {
- Tcl_DecrRefCount(tsdPtr->encoding);
- }
- tsdPtr->encoding = newEncoding;
- if (tsdPtr->encoding != NULL) {
- Tcl_IncrRefCount(tsdPtr->encoding);
- }
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Tcl_GetStartupScript --
- *
- * Gets the path and encoding of the startup script to be evaluated by
- * Tcl_Main.
- *
- * Results:
- * The path of the startup script; NULL if none has been set.
- *
- * Side effects:
- * If encodingPtr is not NULL, stores a (const char *) in it pointing to
- * the encoding name registered for the startup script. Tcl retains
- * ownership of the string, and may free it. Caller should make a copy
- * for long-term use.
- *
- *----------------------------------------------------------------------
- */
-
-Tcl_Obj *
-Tcl_GetStartupScript(
- const char **encodingPtr) /* When not NULL, points to storage for the
- * (const char *) that points to the
- * registered encoding name for the startup
- * script. */
-{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-
- if (encodingPtr != NULL) {
- if (tsdPtr->encoding == NULL) {
- *encodingPtr = NULL;
- } else {
- *encodingPtr = Tcl_GetString(tsdPtr->encoding);
- }
- }
- return tsdPtr->path;
-}
-\f
-/*----------------------------------------------------------------------
- *
- * Tcl_SourceRCFile --
- *
- * This function is typically invoked by Tcl_Main of Tk_Main function to
- * source an application specific rc file into the interpreter at startup
- * time.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Depends on what's in the rc script.
- *
- *----------------------------------------------------------------------
- */
-
-void
-Tcl_SourceRCFile(
- Tcl_Interp *interp) /* Interpreter to source rc file into. */
-{
- Tcl_DString temp;
- const char *fileName;
- Tcl_Channel chan;
-
- fileName = Tcl_GetVar(interp, "tcl_rcFileName", TCL_GLOBAL_ONLY);
- if (fileName != NULL) {
- Tcl_Channel c;
- const char *fullName;
-
- Tcl_DStringInit(&temp);
- fullName = Tcl_TranslateFileName(interp, fileName, &temp);
- if (fullName == NULL) {
- /*
- * Couldn't translate the file name (e.g. it referred to a bogus
- * user or there was no HOME environment variable). Just do
- * nothing.
- */
- } else {
- /*
- * Test for the existence of the rc file before trying to read it.
- */
-
- c = Tcl_OpenFileChannel(NULL, fullName, "r", 0);
- if (c != NULL) {
- Tcl_Close(NULL, c);
- if (Tcl_EvalFile(interp, fullName) != TCL_OK) {
- chan = Tcl_GetStdChannel(TCL_STDERR);
- if (chan) {
- Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
- Tcl_WriteChars(chan, "\n", 1);
- }
- }
- }
- }
- Tcl_DStringFree(&temp);
- }
-}
-#endif /* !TCL_ASCII_MAIN */
-\f
-/*----------------------------------------------------------------------
- *
- * Tcl_Main, Tcl_MainEx --
- *
- * Main program for tclsh and most other Tcl-based applications.
- *
- * Results:
- * None. This function never returns (it exits the process when it's
- * done).
- *
- * Side effects:
- * This function initializes the Tcl world and then starts interpreting
- * commands; almost anything could happen, depending on the script being
- * interpreted.
- *
- *----------------------------------------------------------------------
- */
-
-void
-Tcl_MainEx(
- int argc, /* Number of arguments. */
- TCHAR **argv, /* Array of argument strings. */
- Tcl_AppInitProc *appInitProc,
- /* Application-specific initialization
- * function to call after most initialization
- * but before starting to execute commands. */
- Tcl_Interp *interp)
-{
- Tcl_Obj *path, *resultPtr, *argvPtr, *appName;
- const char *encodingName = NULL;
- int code, exitCode = 0;
- Tcl_MainLoopProc *mainLoopProc;
- Tcl_Channel chan;
- InteractiveState is;
-
- TclpSetInitialEncodings();
- TclpFindExecutable((const char *)argv[0]);
-
- Tcl_InitMemory(interp);
-
- is.interp = interp;
- is.prompt = PROMPT_START;
- is.commandPtr = Tcl_NewObj();
-
- /*
- * If the application has not already set a startup script, parse the
- * first few command line arguments to determine the script path and
- * encoding.
- */
-
- if (NULL == Tcl_GetStartupScript(NULL)) {
- /*
- * Check whether first 3 args (argv[1] - argv[3]) look like
- * -encoding ENCODING FILENAME
- * or like
- * FILENAME
- */
-
- if ((argc > 3) && (0 == _tcscmp(TEXT("-encoding"), argv[1]))
- && ('-' != argv[3][0])) {
- Tcl_Obj *value = NewNativeObj(argv[2], -1);
- Tcl_SetStartupScript(NewNativeObj(argv[3], -1),
- Tcl_GetString(value));
- Tcl_DecrRefCount(value);
- argc -= 3;
- argv += 3;
- } else if ((argc > 1) && ('-' != argv[1][0])) {
- Tcl_SetStartupScript(NewNativeObj(argv[1], -1), NULL);
- argc--;
- argv++;
- }
- }
-
- path = Tcl_GetStartupScript(&encodingName);
- if (path == NULL) {
- appName = NewNativeObj(argv[0], -1);
- } else {
- appName = path;
- }
- Tcl_SetVar2Ex(interp, "argv0", NULL, appName, TCL_GLOBAL_ONLY);
- argc--;
- argv++;
-
- Tcl_SetVar2Ex(interp, "argc", NULL, Tcl_NewIntObj(argc), TCL_GLOBAL_ONLY);
-
- argvPtr = Tcl_NewListObj(0, NULL);
- while (argc--) {
- Tcl_ListObjAppendElement(NULL, argvPtr, NewNativeObj(*argv++, -1));
- }
- Tcl_SetVar2Ex(interp, "argv", NULL, argvPtr, TCL_GLOBAL_ONLY);
-
- /*
- * Set the "tcl_interactive" variable.
- */
-
- is.tty = isatty(0);
- Tcl_SetVar2Ex(interp, "tcl_interactive", NULL,
- Tcl_NewIntObj(!path && is.tty), TCL_GLOBAL_ONLY);
-
- /*
- * Invoke application-specific initialization.
- */
-
- Tcl_Preserve(interp);
- if (appInitProc(interp) != TCL_OK) {
- chan = Tcl_GetStdChannel(TCL_STDERR);
- if (chan) {
- Tcl_WriteChars(chan,
- "application-specific initialization failed: ", -1);
- Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
- Tcl_WriteChars(chan, "\n", 1);
- }
- }
- if (Tcl_InterpDeleted(interp)) {
- goto done;
- }
- if (Tcl_LimitExceeded(interp)) {
- goto done;
- }
- if (TclFullFinalizationRequested()) {
- /*
- * Arrange for final deletion of the main interp
- */
-
- /* ARGH Munchhausen effect */
- Tcl_CreateExitHandler(FreeMainInterp, interp);
- }
-
- /*
- * Invoke the script specified on the command line, if any. Must fetch it
- * again, as the appInitProc might have reset it.
- */
-
- path = Tcl_GetStartupScript(&encodingName);
- if (path != NULL) {
- Tcl_ResetResult(interp);
- code = Tcl_FSEvalFileEx(interp, path, encodingName);
- if (code != TCL_OK) {
- chan = Tcl_GetStdChannel(TCL_STDERR);
- if (chan) {
- Tcl_Obj *options = Tcl_GetReturnOptions(interp, code);
- Tcl_Obj *keyPtr, *valuePtr;
-
- TclNewLiteralStringObj(keyPtr, "-errorinfo");
- Tcl_IncrRefCount(keyPtr);
- Tcl_DictObjGet(NULL, options, keyPtr, &valuePtr);
- Tcl_DecrRefCount(keyPtr);
-
- if (valuePtr) {
- Tcl_WriteObj(chan, valuePtr);
- }
- Tcl_WriteChars(chan, "\n", 1);
- Tcl_DecrRefCount(options);
- }
- exitCode = 1;
- }
- goto done;
- }
-
- /*
- * We're running interactively. Source a user-specific startup file if the
- * application specified one and if the file exists.
- */
-
- Tcl_SourceRCFile(interp);
- if (Tcl_LimitExceeded(interp)) {
- goto done;
- }
-
- /*
- * Process commands from stdin until there's an end-of-file. Note that we
- * need to fetch the standard channels again after every eval, since they
- * may have been changed.
- */
-
- Tcl_IncrRefCount(is.commandPtr);
-
- /*
- * Get a new value for tty if anyone writes to ::tcl_interactive
- */
-
- Tcl_LinkVar(interp, "tcl_interactive", (char *) &is.tty, TCL_LINK_BOOLEAN);
- is.input = Tcl_GetStdChannel(TCL_STDIN);
- while ((is.input != NULL) && !Tcl_InterpDeleted(interp)) {
- mainLoopProc = TclGetMainLoop();
- if (mainLoopProc == NULL) {
- int length;
-
- if (is.tty) {
- Prompt(interp, &is);
- if (Tcl_InterpDeleted(interp)) {
- break;
- }
- if (Tcl_LimitExceeded(interp)) {
- break;
- }
- is.input = Tcl_GetStdChannel(TCL_STDIN);
- if (is.input == NULL) {
- break;
- }
- }
- if (Tcl_IsShared(is.commandPtr)) {
- Tcl_DecrRefCount(is.commandPtr);
- is.commandPtr = Tcl_DuplicateObj(is.commandPtr);
- Tcl_IncrRefCount(is.commandPtr);
- }
- length = Tcl_GetsObj(is.input, is.commandPtr);
- if (length < 0) {
- if (Tcl_InputBlocked(is.input)) {
- /*
- * This can only happen if stdin has been set to
- * non-blocking. In that case cycle back and try again.
- * This sets up a tight polling loop (since we have no
- * event loop running). If this causes bad CPU hogging, we
- * might try toggling the blocking on stdin instead.
- */
-
- continue;
- }
-
- /*
- * Either EOF, or an error on stdin; we're done
- */
-
- break;
- }
-
- /*
- * Add the newline removed by Tcl_GetsObj back to the string. Have
- * to add it back before testing completeness, because it can make
- * a difference. [Bug 1775878]
- */
-
- if (Tcl_IsShared(is.commandPtr)) {
- Tcl_DecrRefCount(is.commandPtr);
- is.commandPtr = Tcl_DuplicateObj(is.commandPtr);
- Tcl_IncrRefCount(is.commandPtr);
- }
- Tcl_AppendToObj(is.commandPtr, "\n", 1);
- if (!TclObjCommandComplete(is.commandPtr)) {
- is.prompt = PROMPT_CONTINUE;
- continue;
- }
-
- is.prompt = PROMPT_START;
-
- /*
- * The final newline is syntactically redundant, and causes some
- * error messages troubles deeper in, so lop it back off.
- */
-
- Tcl_GetStringFromObj(is.commandPtr, &length);
- Tcl_SetObjLength(is.commandPtr, --length);
- code = Tcl_RecordAndEvalObj(interp, is.commandPtr,
- TCL_EVAL_GLOBAL);
- is.input = Tcl_GetStdChannel(TCL_STDIN);
- Tcl_DecrRefCount(is.commandPtr);
- is.commandPtr = Tcl_NewObj();
- Tcl_IncrRefCount(is.commandPtr);
- if (code != TCL_OK) {
- chan = Tcl_GetStdChannel(TCL_STDERR);
- if (chan) {
- Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
- Tcl_WriteChars(chan, "\n", 1);
- }
- } else if (is.tty) {
- resultPtr = Tcl_GetObjResult(interp);
- Tcl_IncrRefCount(resultPtr);
- Tcl_GetStringFromObj(resultPtr, &length);
- chan = Tcl_GetStdChannel(TCL_STDOUT);
- if ((length > 0) && chan) {
- Tcl_WriteObj(chan, resultPtr);
- Tcl_WriteChars(chan, "\n", 1);
- }
- Tcl_DecrRefCount(resultPtr);
- }
- } else { /* (mainLoopProc != NULL) */
- /*
- * If a main loop has been defined while running interactively, we
- * want to start a fileevent based prompt by establishing a
- * channel handler for stdin.
- */
-
- if (is.input) {
- if (is.tty) {
- Prompt(interp, &is);
- }
-
- Tcl_CreateChannelHandler(is.input, TCL_READABLE,
- StdinProc, &is);
- }
-
- mainLoopProc();
- Tcl_SetMainLoop(NULL);
-
- if (is.input) {
- Tcl_DeleteChannelHandler(is.input, StdinProc, &is);
- }
- is.input = Tcl_GetStdChannel(TCL_STDIN);
- }
-
- /*
- * This code here only for the (unsupported and deprecated) [checkmem]
- * command.
- */
-
-#ifdef TCL_MEM_DEBUG
- if (tclMemDumpFileName != NULL) {
- Tcl_SetMainLoop(NULL);
- Tcl_DeleteInterp(interp);
- }
-#endif /* TCL_MEM_DEBUG */
- }
-
- done:
- mainLoopProc = TclGetMainLoop();
- if ((exitCode == 0) && mainLoopProc && !Tcl_LimitExceeded(interp)) {
- /*
- * If everything has gone OK so far, call the main loop proc, if it
- * exists. Packages (like Tk) can set it to start processing events at
- * this point.
- */
-
- mainLoopProc();
- Tcl_SetMainLoop(NULL);
- }
- if (is.commandPtr != NULL) {
- Tcl_DecrRefCount(is.commandPtr);
- }
-
- /*
- * Rather than calling exit, invoke the "exit" command so that users can
- * replace "exit" with some other command to do additional cleanup on
- * exit. The Tcl_EvalObjEx call should never return.
- */
-
- if (!Tcl_InterpDeleted(interp) && !Tcl_LimitExceeded(interp)) {
- Tcl_Obj *cmd = Tcl_ObjPrintf("exit %d", exitCode);
-
- Tcl_IncrRefCount(cmd);
- Tcl_EvalObjEx(interp, cmd, TCL_EVAL_GLOBAL);
- Tcl_DecrRefCount(cmd);
- }
-
- /*
- * If Tcl_EvalObjEx returns, trying to eval [exit], something unusual is
- * happening. Maybe interp has been deleted; maybe [exit] was redefined,
- * maybe we've blown up because of an exceeded limit. We still want to
- * cleanup and exit.
- */
-
- Tcl_Exit(exitCode);
-}
-
-#if (TCL_MAJOR_VERSION == 8) && !defined(UNICODE)
-#undef Tcl_Main
-extern DLLEXPORT void
-Tcl_Main(
- int argc, /* Number of arguments. */
- char **argv, /* Array of argument strings. */
- Tcl_AppInitProc *appInitProc)
- /* Application-specific initialization
- * function to call after most initialization
- * but before starting to execute commands. */
-{
- Tcl_MainEx(argc, argv, appInitProc, Tcl_CreateInterp());
-}
-#endif /* TCL_MAJOR_VERSION == 8 && !UNICODE */
-\f
-#ifndef TCL_ASCII_MAIN
-
-/*
- *---------------------------------------------------------------
- *
- * Tcl_SetMainLoop --
- *
- * Sets an alternative main loop function.
- *
- * Results:
- * None.
- *
- * Side effects:
- * This function will be called before Tcl exits, allowing for the
- * creation of an event loop.
- *
- *---------------------------------------------------------------
- */
-
-void
-Tcl_SetMainLoop(
- Tcl_MainLoopProc *proc)
-{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-
- tsdPtr->mainLoopProc = proc;
-}
-\f
-/*
- *---------------------------------------------------------------
- *
- * TclGetMainLoop --
- *
- * Returns the current alternative main loop function.
- *
- * Results:
- * Returns the previously defined main loop function, or NULL to indicate
- * that no such function has been installed and standard tclsh behaviour
- * (i.e., exit once the script is evaluated if not interactive) is
- * requested..
- *
- * Side effects:
- * None (other than possible creation of this file's TSD block).
- *
- *---------------------------------------------------------------
- */
-
-Tcl_MainLoopProc *
-TclGetMainLoop(void)
-{
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
-
- return tsdPtr->mainLoopProc;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * TclFullFinalizationRequested --
- *
- * This function returns true when either -DPURIFY is specified, or the
- * environment variable TCL_FINALIZE_ON_EXIT is set and not "0". This
- * predicate is called at places affecting the exit sequence, so that the
- * default behavior is a fast and deadlock-free exit, and the modified
- * behavior is a more thorough finalization for debugging purposes (leak
- * hunting etc).
- *
- * Results:
- * A boolean.
- *
- *----------------------------------------------------------------------
- */
-
-MODULE_SCOPE int
-TclFullFinalizationRequested(void)
-{
-#ifdef PURIFY
- return 1;
-#else
- const char *fin;
- Tcl_DString ds;
- int finalize = 0;
-
- fin = TclGetEnv("TCL_FINALIZE_ON_EXIT", &ds);
- finalize = ((fin != NULL) && strcmp(fin, "0"));
- if (fin != NULL) {
- Tcl_DStringFree(&ds);
- }
- return finalize;
-#endif /* PURIFY */
-}
-#endif /* !TCL_ASCII_MAIN */
-\f
-/*
- *----------------------------------------------------------------------
- *
- * StdinProc --
- *
- * This function is invoked by the event dispatcher whenever standard
- * input becomes readable. It grabs the next line of input characters,
- * adds them to a command being assembled, and executes the command if
- * it's complete.
- *
- * Results:
- * None.
- *
- * Side effects:
- * Could be almost arbitrary, depending on the command that's typed.
- *
- *----------------------------------------------------------------------
- */
-
- /* ARGSUSED */
-static void
-StdinProc(
- ClientData clientData, /* The state of interactive cmd line */
- int mask) /* Not used. */
-{
- int code, length;
- InteractiveState *isPtr = clientData;
- Tcl_Channel chan = isPtr->input;
- Tcl_Obj *commandPtr = isPtr->commandPtr;
- Tcl_Interp *interp = isPtr->interp;
-
- if (Tcl_IsShared(commandPtr)) {
- Tcl_DecrRefCount(commandPtr);
- commandPtr = Tcl_DuplicateObj(commandPtr);
- Tcl_IncrRefCount(commandPtr);
- }
- length = Tcl_GetsObj(chan, commandPtr);
- if (length < 0) {
- if (Tcl_InputBlocked(chan)) {
- return;
- }
- if (isPtr->tty) {
- /*
- * Would be better to find a way to exit the mainLoop? Or perhaps
- * evaluate [exit]? Leaving as is for now due to compatibility
- * concerns.
- */
-
- Tcl_Exit(0);
- }
- Tcl_DeleteChannelHandler(chan, StdinProc, isPtr);
- return;
- }
-
- if (Tcl_IsShared(commandPtr)) {
- Tcl_DecrRefCount(commandPtr);
- commandPtr = Tcl_DuplicateObj(commandPtr);
- Tcl_IncrRefCount(commandPtr);
- }
- Tcl_AppendToObj(commandPtr, "\n", 1);
- if (!TclObjCommandComplete(commandPtr)) {
- isPtr->prompt = PROMPT_CONTINUE;
- goto prompt;
- }
- isPtr->prompt = PROMPT_START;
- Tcl_GetStringFromObj(commandPtr, &length);
- Tcl_SetObjLength(commandPtr, --length);
-
- /*
- * Disable the stdin channel handler while evaluating the command;
- * otherwise if the command re-enters the event loop we might process
- * commands from stdin before the current command is finished. Among other
- * things, this will trash the text of the command being evaluated.
- */
-
- Tcl_CreateChannelHandler(chan, 0, StdinProc, isPtr);
- code = Tcl_RecordAndEvalObj(interp, commandPtr, TCL_EVAL_GLOBAL);
- isPtr->input = chan = Tcl_GetStdChannel(TCL_STDIN);
- Tcl_DecrRefCount(commandPtr);
- isPtr->commandPtr = commandPtr = Tcl_NewObj();
- Tcl_IncrRefCount(commandPtr);
- if (chan != NULL) {
- Tcl_CreateChannelHandler(chan, TCL_READABLE, StdinProc, isPtr);
- }
- if (code != TCL_OK) {
- chan = Tcl_GetStdChannel(TCL_STDERR);
-
- if (chan != NULL) {
- Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
- Tcl_WriteChars(chan, "\n", 1);
- }
- } else if (isPtr->tty) {
- Tcl_Obj *resultPtr = Tcl_GetObjResult(interp);
- chan = Tcl_GetStdChannel(TCL_STDOUT);
-
- Tcl_IncrRefCount(resultPtr);
- Tcl_GetStringFromObj(resultPtr, &length);
- if ((length > 0) && (chan != NULL)) {
- Tcl_WriteObj(chan, resultPtr);
- Tcl_WriteChars(chan, "\n", 1);
- }
- Tcl_DecrRefCount(resultPtr);
- }
-
- /*
- * If a tty stdin is still around, output a prompt.
- */
-
- prompt:
- if (isPtr->tty && (isPtr->input != NULL)) {
- Prompt(interp, isPtr);
- isPtr->input = Tcl_GetStdChannel(TCL_STDIN);
- }
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * Prompt --
- *
- * Issue a prompt on standard output, or invoke a script to issue the
- * prompt.
- *
- * Results:
- * None.
- *
- * Side effects:
- * A prompt gets output, and a Tcl script may be evaluated in interp.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-Prompt(
- Tcl_Interp *interp, /* Interpreter to use for prompting. */
- InteractiveState *isPtr) /* InteractiveState. Filled with PROMPT_NONE
- * after a prompt is printed. */
-{
- Tcl_Obj *promptCmdPtr;
- int code;
- Tcl_Channel chan;
-
- if (isPtr->prompt == PROMPT_NONE) {
- return;
- }
-
- promptCmdPtr = Tcl_GetVar2Ex(interp,
- (isPtr->prompt==PROMPT_CONTINUE ? "tcl_prompt2" : "tcl_prompt1"),
- NULL, TCL_GLOBAL_ONLY);
-
- if (Tcl_InterpDeleted(interp)) {
- return;
- }
- if (promptCmdPtr == NULL) {
- defaultPrompt:
- if (isPtr->prompt == PROMPT_START) {
- chan = Tcl_GetStdChannel(TCL_STDOUT);
- if (chan != NULL) {
- Tcl_WriteChars(chan, DEFAULT_PRIMARY_PROMPT,
- strlen(DEFAULT_PRIMARY_PROMPT));
- }
- }
- } else {
- code = Tcl_EvalObjEx(interp, promptCmdPtr, TCL_EVAL_GLOBAL);
- if (code != TCL_OK) {
- Tcl_AddErrorInfo(interp,
- "\n (script that generates prompt)");
- chan = Tcl_GetStdChannel(TCL_STDERR);
- if (chan != NULL) {
- Tcl_WriteObj(chan, Tcl_GetObjResult(interp));
- Tcl_WriteChars(chan, "\n", 1);
- }
- goto defaultPrompt;
- }
- }
-
- chan = Tcl_GetStdChannel(TCL_STDOUT);
- if (chan != NULL) {
- Tcl_Flush(chan);
- }
- isPtr->prompt = PROMPT_NONE;
-}
-\f
-/*
- *----------------------------------------------------------------------
- *
- * FreeMainInterp --
- *
- * Exit handler used to cleanup the main interpreter and ancillary
- * startup script storage at exit.
- *
- *----------------------------------------------------------------------
- */
-
-static void
-FreeMainInterp(
- ClientData clientData)
-{
- Tcl_Interp *interp = clientData;
-
- /*if (TclInExit()) return;*/
-
- if (!Tcl_InterpDeleted(interp)) {
- Tcl_DeleteInterp(interp);
- }
- Tcl_SetStartupScript(NULL, NULL);
- Tcl_Release(interp);
-}
-\f
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 4
- * fill-column: 78
- * End:
- */
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