diff options
Diffstat (limited to 'generic/tclMain.c')
| -rw-r--r-- | generic/tclMain.c | 578 |
1 files changed, 379 insertions, 199 deletions
diff --git a/generic/tclMain.c b/generic/tclMain.c index 28a3dab..7a19a38 100644 --- a/generic/tclMain.c +++ b/generic/tclMain.c @@ -1,4 +1,4 @@ -/* +/* * tclMain.c -- * * Main program for Tcl shells and other Tcl-based applications. @@ -7,100 +7,177 @@ * 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. + * See the file "license.terms" for information on usage and redistribution of + * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ -#include "tcl.h" #include "tclInt.h" -# undef TCL_STORAGE_CLASS -# define TCL_STORAGE_CLASS DLLEXPORT +#undef TCL_STORAGE_CLASS +#define TCL_STORAGE_CLASS DLLEXPORT /* - * Declarations for various library procedures 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). + * The default prompt used when the user has not overridden it. */ -extern int isatty _ANSI_ARGS_((int fd)); +#define DEFAULT_PRIMARY_PROMPT "% " -static Tcl_Obj *tclStartupScriptPath = NULL; +/* + * 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); +static Tcl_Obj *tclStartupScriptPath = NULL; +static Tcl_Obj *tclStartupScriptEncoding = NULL; static Tcl_MainLoopProc *mainLoopProc = NULL; -/* - * 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. +/* + * 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 */ + 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. */ + 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 procedures defined later in this file. + * Forward declarations for functions defined later in this file. */ -static void Prompt _ANSI_ARGS_((Tcl_Interp *interp, - PromptType *promptPtr)); -static void StdinProc _ANSI_ARGS_((ClientData clientData, - int mask)); - +static void Prompt(Tcl_Interp *interp, PromptType *promptPtr); +static void StdinProc(ClientData clientData, int mask); /* *---------------------------------------------------------------------- * - * TclSetStartupScriptPath -- + * Tcl_SetStartupScript -- * - * Primes the startup script VFS path, used to override the - * command line processing. + * Sets the path and encoding of the startup script to be evaluated by + * Tcl_Main, used to override the command line processing. * * Results: - * None. + * None. * * Side effects: - * This procedure initializes the VFS path of the Tcl script to - * run at startup. * *---------------------------------------------------------------------- */ -void TclSetStartupScriptPath(pathPtr) - Tcl_Obj *pathPtr; + +void +Tcl_SetStartupScript( + Tcl_Obj *path, /* Filesystem path of startup script file */ + CONST char *encoding) /* Encoding of the data in that file */ { + Tcl_Obj *newEncoding = NULL; + if (encoding != NULL) { + newEncoding = Tcl_NewStringObj(encoding, -1); + } + if (tclStartupScriptPath != NULL) { Tcl_DecrRefCount(tclStartupScriptPath); } - tclStartupScriptPath = pathPtr; + tclStartupScriptPath = path; if (tclStartupScriptPath != NULL) { Tcl_IncrRefCount(tclStartupScriptPath); } + + if (tclStartupScriptEncoding != NULL) { + Tcl_DecrRefCount(tclStartupScriptEncoding); + } + tclStartupScriptEncoding = newEncoding; + if (tclStartupScriptEncoding != NULL) { + Tcl_IncrRefCount(tclStartupScriptEncoding); + } } + +/* + *---------------------------------------------------------------------- + * + * 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 */ +{ + if (encodingPtr != NULL) { + if (tclStartupScriptEncoding == NULL) { + *encodingPtr = NULL; + } else { + *encodingPtr = Tcl_GetString(tclStartupScriptEncoding); + } + } + return tclStartupScriptPath; +} + +/* + *---------------------------------------------------------------------- + * + * TclSetStartupScriptPath -- + * + * Primes the startup script VFS path, used to override the command line + * processing. + * + * Results: + * None. + * + * Side effects: + * This function initializes the VFS path of the Tcl script to run at + * startup. + * + *---------------------------------------------------------------------- + */ +void +TclSetStartupScriptPath( + Tcl_Obj *path) +{ + Tcl_SetStartupScript(path, NULL); +} + /* *---------------------------------------------------------------------- * * TclGetStartupScriptPath -- * - * Gets the startup script VFS path, used to override the - * command line processing. + * Gets the startup script VFS path, used to override the command line + * processing. * * Results: * The startup script VFS path, NULL if none has been set. @@ -110,44 +187,46 @@ void TclSetStartupScriptPath(pathPtr) * *---------------------------------------------------------------------- */ -Tcl_Obj *TclGetStartupScriptPath() + +Tcl_Obj * +TclGetStartupScriptPath(void) { - return tclStartupScriptPath; + return Tcl_GetStartupScript(NULL); } - - + /* *---------------------------------------------------------------------- * * TclSetStartupScriptFileName -- * - * Primes the startup script file name, used to override the - * command line processing. + * Primes the startup script file name, used to override the command line + * processing. * * Results: - * None. + * None. * * Side effects: - * This procedure initializes the file name of the Tcl script to - * run at startup. + * This function initializes the file name of the Tcl script to run at + * startup. * *---------------------------------------------------------------------- */ -void TclSetStartupScriptFileName(fileName) - CONST char *fileName; + +void +TclSetStartupScriptFileName( + CONST char *fileName) { - Tcl_Obj *pathPtr = Tcl_NewStringObj(fileName,-1); - TclSetStartupScriptPath(pathPtr); + Tcl_Obj *path = Tcl_NewStringObj(fileName,-1); + Tcl_SetStartupScript(path, NULL); } - /* *---------------------------------------------------------------------- * * TclGetStartupScriptFileName -- * - * Gets the startup script file name, used to override the - * command line processing. + * Gets the startup script file name, used to override the command line + * processing. * * Results: * The startup script file name, NULL if none has been set. @@ -157,54 +236,111 @@ void TclSetStartupScriptFileName(fileName) * *---------------------------------------------------------------------- */ -CONST char *TclGetStartupScriptFileName() + +CONST char * +TclGetStartupScriptFileName(void) { - Tcl_Obj *pathPtr = TclGetStartupScriptPath(); + Tcl_Obj *path = Tcl_GetStartupScript(NULL); - if (pathPtr == NULL) { + if (path == NULL) { return NULL; } - return Tcl_GetString(pathPtr); + return Tcl_GetString(path); } + +/*---------------------------------------------------------------------- + * + * 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 errChannel; + 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 != (Tcl_Channel) NULL) { + Tcl_Close(NULL, c); + if (Tcl_EvalFile(interp, fullName) != TCL_OK) { + errChannel = Tcl_GetStdChannel(TCL_STDERR); + if (errChannel) { + Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); + Tcl_WriteChars(errChannel, "\n", 1); + } + } + } + } + Tcl_DStringFree(&temp); + } +} -/* - *---------------------------------------------------------------------- +/*---------------------------------------------------------------------- * * Tcl_Main -- * * Main program for tclsh and most other Tcl-based applications. * * Results: - * None. This procedure never returns (it exits the process when - * it's done). + * None. This function never returns (it exits the process when it's + * done). * * Side effects: - * This procedure initializes the Tcl world and then starts - * interpreting commands; almost anything could happen, depending - * on the script being interpreted. + * This function initializes the Tcl world and then starts interpreting + * commands; almost anything could happen, depending on the script being + * interpreted. * *---------------------------------------------------------------------- */ void -Tcl_Main(argc, argv, appInitProc) - int argc; /* Number of arguments. */ - char **argv; /* Array of argument strings. */ - Tcl_AppInitProc *appInitProc; +Tcl_Main( + int argc, /* Number of arguments. */ + char **argv, /* Array of argument strings. */ + Tcl_AppInitProc *appInitProc) /* Application-specific initialization - * procedure to call after most - * initialization but before starting to - * execute commands. */ + * function to call after most initialization + * but before starting to execute commands. */ { - Tcl_Obj *resultPtr, *argvPtr, *commandPtr = NULL; + Tcl_Obj *path, *resultPtr, *argvPtr, *commandPtr = NULL; + CONST char *encodingName = NULL; PromptType prompt = PROMPT_START; int code, length, tty, exitCode = 0; Tcl_Channel inChannel, outChannel, errChannel; Tcl_Interp *interp; Tcl_DString appName; - Tcl_Obj *objPtr; Tcl_FindExecutable(argv[0]); @@ -212,35 +348,48 @@ Tcl_Main(argc, argv, appInitProc) Tcl_InitMemory(interp); /* - * Make command-line arguments available in the Tcl variables "argc" - * and "argv". If the first argument doesn't start with a "-" then - * strip it off and use it as the name of a script file to process. + * 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 (TclGetStartupScriptPath() == NULL) { - if ((argc > 1) && (argv[1][0] != '-')) { - TclSetStartupScriptFileName(argv[1]); + 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 == strcmp("-encoding", argv[1])) + && ('-' != argv[3][0])) { + Tcl_SetStartupScript(Tcl_NewStringObj(argv[3], -1), argv[2]); + argc -= 3; + argv += 3; + } else if ((argc > 1) && ('-' != argv[1][0])) { + Tcl_SetStartupScript(Tcl_NewStringObj(argv[1], -1), NULL); argc--; argv++; } } - if (TclGetStartupScriptPath() == NULL) { + path = Tcl_GetStartupScript(&encodingName); + if (path == NULL) { Tcl_ExternalToUtfDString(NULL, argv[0], -1, &appName); } else { - TclSetStartupScriptFileName(Tcl_ExternalToUtfDString(NULL, - TclGetStartupScriptFileName(), -1, &appName)); + CONST char *pathName = Tcl_GetStringFromObj(path, &length); + Tcl_ExternalToUtfDString(NULL, pathName, length, &appName); + path = Tcl_NewStringObj(Tcl_DStringValue(&appName), -1); + Tcl_SetStartupScript(path, encodingName); } Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&appName), TCL_GLOBAL_ONLY); Tcl_DStringFree(&appName); argc--; argv++; - objPtr = Tcl_NewIntObj(argc); - Tcl_IncrRefCount(objPtr); - Tcl_SetVar2Ex(interp, "argc", NULL, objPtr, TCL_GLOBAL_ONLY); - Tcl_DecrRefCount(objPtr); - + Tcl_SetVar2Ex(interp, "argc", NULL, Tcl_NewIntObj(argc), TCL_GLOBAL_ONLY); + argvPtr = Tcl_NewListObj(0, NULL); while (argc--) { Tcl_DString ds; @@ -249,19 +398,16 @@ Tcl_Main(argc, argv, appInitProc) Tcl_DStringValue(&ds), Tcl_DStringLength(&ds))); Tcl_DStringFree(&ds); } - Tcl_IncrRefCount(argvPtr); Tcl_SetVar2Ex(interp, "argv", NULL, argvPtr, TCL_GLOBAL_ONLY); - Tcl_DecrRefCount(argvPtr); /* * Set the "tcl_interactive" variable. */ tty = isatty(0); - Tcl_SetVar(interp, "tcl_interactive", - ((TclGetStartupScriptPath() == NULL) && tty) ? "1" : "0", + Tcl_SetVar(interp, "tcl_interactive", ((path == NULL) && tty) ? "1" : "0", TCL_GLOBAL_ONLY); - + /* * Invoke application-specific initialization. */ @@ -279,27 +425,34 @@ Tcl_Main(argc, argv, appInitProc) if (Tcl_InterpDeleted(interp)) { goto done; } + if (Tcl_LimitExceeded(interp)) { + goto done; + } /* - * If a script file was specified then just source that file - * and quit. + * If a script file was specified then just source that file and quit. + * Must fetch it again, as the appInitProc might have reset it. */ - if (TclGetStartupScriptPath() != NULL) { - code = Tcl_FSEvalFile(interp, TclGetStartupScriptPath()); + path = Tcl_GetStartupScript(&encodingName); + if (path != NULL) { + code = Tcl_FSEvalFileEx(interp, path, encodingName); if (code != TCL_OK) { errChannel = Tcl_GetStdChannel(TCL_STDERR); if (errChannel) { + Tcl_Obj *options = Tcl_GetReturnOptions(interp, code); + Tcl_Obj *keyPtr, *valuePtr; - /* - * The following statement guarantees that the errorInfo - * variable is set properly. - */ + TclNewLiteralStringObj(keyPtr, "-errorinfo"); + Tcl_IncrRefCount(keyPtr); + Tcl_DictObjGet(NULL, options, keyPtr, &valuePtr); + Tcl_DecrRefCount(keyPtr); - Tcl_AddErrorInfo(interp, ""); - Tcl_WriteObj(errChannel, Tcl_GetVar2Ex(interp, "errorInfo", - NULL, TCL_GLOBAL_ONLY)); + if (valuePtr) { + Tcl_WriteObj(errChannel, valuePtr); + } Tcl_WriteChars(errChannel, "\n", 1); + Tcl_DecrRefCount(options); } exitCode = 1; } @@ -307,16 +460,19 @@ Tcl_Main(argc, argv, appInitProc) } /* - * We're running interactively. Source a user-specific startup - * file if the application specified one and if the file exists. + * 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. + * 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. */ commandPtr = Tcl_NewObj(); @@ -325,6 +481,7 @@ Tcl_Main(argc, argv, appInitProc) /* * Get a new value for tty if anyone writes to ::tcl_interactive */ + Tcl_LinkVar(interp, "tcl_interactive", (char *) &tty, TCL_LINK_BOOLEAN); inChannel = Tcl_GetStdChannel(TCL_STDIN); outChannel = Tcl_GetStdChannel(TCL_STDOUT); @@ -335,9 +492,12 @@ Tcl_Main(argc, argv, appInitProc) if (Tcl_InterpDeleted(interp)) { break; } + if (Tcl_LimitExceeded(interp)) { + break; + } inChannel = Tcl_GetStdChannel(TCL_STDIN); if (inChannel == (Tcl_Channel) NULL) { - break; + break; } } if (Tcl_IsShared(commandPtr)) { @@ -345,32 +505,32 @@ Tcl_Main(argc, argv, appInitProc) commandPtr = Tcl_DuplicateObj(commandPtr); Tcl_IncrRefCount(commandPtr); } - length = Tcl_GetsObj(inChannel, commandPtr); + length = Tcl_GetsObj(inChannel, commandPtr); if (length < 0) { if (Tcl_InputBlocked(inChannel)) { - /* * 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. + * 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. - */ + /* + * 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(commandPtr)) { Tcl_DecrRefCount(commandPtr); @@ -384,6 +544,12 @@ Tcl_Main(argc, argv, appInitProc) } prompt = PROMPT_START; + /* + * The final newline is syntactically redundant, and causes + * some error messages troubles deeper in, so lop it back off. + */ + Tcl_GetStringFromObj(commandPtr, &length); + Tcl_SetObjLength(commandPtr, --length); code = Tcl_RecordAndEvalObj(interp, commandPtr, TCL_EVAL_GLOBAL); inChannel = Tcl_GetStdChannel(TCL_STDIN); outChannel = Tcl_GetStdChannel(TCL_STDOUT); @@ -396,7 +562,7 @@ Tcl_Main(argc, argv, appInitProc) Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); Tcl_WriteChars(errChannel, "\n", 1); } - } else if (tty) { + } else if (tty) { resultPtr = Tcl_GetObjResult(interp); Tcl_IncrRefCount(resultPtr); Tcl_GetStringFromObj(resultPtr, &length); @@ -408,18 +574,18 @@ Tcl_Main(argc, argv, appInitProc) } } else { /* (mainLoopProc != NULL) */ /* - * If a main loop has been defined while running interactively, - * we want to start a fileevent based prompt by establishing a + * 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. */ InteractiveState *isPtr = NULL; if (inChannel) { - if (tty) { + if (tty) { Prompt(interp, &prompt); - } - isPtr = (InteractiveState *) + } + isPtr = (InteractiveState *) ckalloc((int) sizeof(InteractiveState)); isPtr->input = inChannel; isPtr->tty = tty; @@ -458,8 +624,8 @@ Tcl_Main(argc, argv, appInitProc) #ifdef TCL_MEM_DEBUG /* - * This code here only for the (unsupported and deprecated) - * [checkmem] command. + * This code here only for the (unsupported and deprecated) [checkmem] + * command. */ if (tclMemDumpFileName != NULL) { @@ -469,13 +635,13 @@ Tcl_Main(argc, argv, appInitProc) #endif } - done: - if ((exitCode == 0) && (mainLoopProc != NULL)) { - + done: + if ((exitCode == 0) && (mainLoopProc != NULL) + && !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. + * 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)(); @@ -486,32 +652,35 @@ Tcl_Main(argc, argv, appInitProc) } /* - * 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_Eval call should never return. + * 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)) { - char buffer[TCL_INTEGER_SPACE + 5]; - sprintf(buffer, "exit %d", exitCode); - Tcl_Eval(interp, buffer); - - /* - * If Tcl_Eval returns, trying to eval [exit], something - * unusual is happening. Maybe interp has been deleted; - * maybe [exit] was redefined. We still want to cleanup - * and exit. - */ - - if (!Tcl_InterpDeleted(interp)) { - Tcl_DeleteInterp(interp); - } + if (!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. + */ + + if (!Tcl_InterpDeleted(interp)) { + Tcl_DeleteInterp(interp); + } } - TclSetStartupScriptPath(NULL); + Tcl_SetStartupScript(NULL, NULL); /* - * If we get here, the master interp has been deleted. Allow - * its destruction with the last matching Tcl_Release. + * If we get here, the master interp has been deleted. Allow its + * destruction with the last matching Tcl_Release. */ Tcl_Release((ClientData) interp); @@ -523,21 +692,21 @@ Tcl_Main(argc, argv, appInitProc) * * Tcl_SetMainLoop -- * - * Sets an alternative main loop procedure. + * Sets an alternative main loop function. * * Results: - * Returns the previously defined main loop procedure. + * Returns the previously defined main loop function. * * Side effects: - * This procedure will be called before Tcl exits, allowing for - * the creation of an event loop. + * This function will be called before Tcl exits, allowing for the + * creation of an event loop. * *--------------------------------------------------------------- */ void -Tcl_SetMainLoop(proc) - Tcl_MainLoopProc *proc; +Tcl_SetMainLoop( + Tcl_MainLoopProc *proc) { mainLoopProc = proc; } @@ -547,26 +716,25 @@ Tcl_SetMainLoop(proc) * * StdinProc -- * - * This procedure 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. + * 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. + * Could be almost arbitrary, depending on the command that's typed. * *---------------------------------------------------------------------- */ /* ARGSUSED */ static void -StdinProc(clientData, mask) - ClientData clientData; /* The state of interactive cmd line */ - int mask; /* Not used. */ +StdinProc( + ClientData clientData, /* The state of interactive cmd line */ + int mask) /* Not used. */ { InteractiveState *isPtr = (InteractiveState *) clientData; Tcl_Channel chan = isPtr->input; @@ -586,10 +754,11 @@ StdinProc(clientData, mask) } 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. + * 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, (ClientData) isPtr); @@ -603,17 +772,18 @@ StdinProc(clientData, mask) } Tcl_AppendToObj(commandPtr, "\n", 1); if (!TclObjCommandComplete(commandPtr)) { - isPtr->prompt = PROMPT_CONTINUE; - goto prompt; + 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. + * 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, (ClientData) isPtr); @@ -648,7 +818,7 @@ StdinProc(clientData, mask) * If a tty stdin is still around, output a prompt. */ - prompt: + prompt: if (isPtr->tty && (isPtr->input != (Tcl_Channel) NULL)) { Prompt(interp, &(isPtr->prompt)); isPtr->input = Tcl_GetStdChannel(TCL_STDIN); @@ -660,25 +830,24 @@ StdinProc(clientData, mask) * * Prompt -- * - * Issue a prompt on standard output, or invoke a script - * to issue the 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. + * A prompt gets output, and a Tcl script may be evaluated in interp. * *---------------------------------------------------------------------- */ static void -Prompt(interp, promptPtr) - Tcl_Interp *interp; /* Interpreter to use for prompting. */ - PromptType *promptPtr; /* Points to type of prompt to print. - * Filled with PROMPT_NONE after a - * prompt is printed. */ +Prompt( + Tcl_Interp *interp, /* Interpreter to use for prompting. */ + PromptType *promptPtr) /* Points to type of prompt to print. Filled + * with PROMPT_NONE after a prompt is + * printed. */ { Tcl_Obj *promptCmdPtr; int code; @@ -691,15 +860,17 @@ Prompt(interp, promptPtr) promptCmdPtr = Tcl_GetVar2Ex(interp, ((*promptPtr == PROMPT_CONTINUE) ? "tcl_prompt2" : "tcl_prompt1"), NULL, TCL_GLOBAL_ONLY); + if (Tcl_InterpDeleted(interp)) { return; } if (promptCmdPtr == NULL) { - defaultPrompt: + defaultPrompt: outChannel = Tcl_GetStdChannel(TCL_STDOUT); if ((*promptPtr == PROMPT_START) && (outChannel != (Tcl_Channel) NULL)) { - Tcl_WriteChars(outChannel, "% ", 2); + Tcl_WriteChars(outChannel, DEFAULT_PRIMARY_PROMPT, + strlen(DEFAULT_PRIMARY_PROMPT)); } } else { code = Tcl_EvalObjEx(interp, promptCmdPtr, TCL_EVAL_GLOBAL); @@ -707,16 +878,25 @@ Prompt(interp, promptPtr) Tcl_AddErrorInfo(interp, "\n (script that generates prompt)"); errChannel = Tcl_GetStdChannel(TCL_STDERR); - if (errChannel != (Tcl_Channel) NULL) { - Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); - Tcl_WriteChars(errChannel, "\n", 1); - } + if (errChannel != (Tcl_Channel) NULL) { + Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); + Tcl_WriteChars(errChannel, "\n", 1); + } goto defaultPrompt; } } + outChannel = Tcl_GetStdChannel(TCL_STDOUT); if (outChannel != (Tcl_Channel) NULL) { Tcl_Flush(outChannel); } *promptPtr = PROMPT_NONE; } + +/* + * Local Variables: + * mode: c + * c-basic-offset: 4 + * fill-column: 78 + * End: + */ |