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#include "pow.h"
/*
* Forward declarations for procedures defined later in this file:
*/
static void Prompt _ANSI_ARGS_((Tcl_Interp *interp, int partial));
static void StdinProc _ANSI_ARGS_((ClientData clientData,
int mask));
static Tcl_DString command;
void PowHandleEvents() {
Pow_Done = 0;
while (!(Pow_Done)) {
Tk_DoOneEvent(0);
}
}
void PowWishHandleEvents() {
Pow_Done = 0;
fflush(stdout);
Tcl_DStringInit(&command);
Tk_CreateFileHandler(0,TK_READABLE,StdinProc, (ClientData) NULL);
if (tty) {
Prompt(interp, 0);
}
while (!(Pow_Done)) {
Tk_DoOneEvent(0);
}
Tk_DeleteFileHandler(0);
Tcl_DStringFree(&command);
}
/*Below here.... Nicked from tkMain.c with slight modifications*/
/*
*----------------------------------------------------------------------
*
* 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. It refuses to execute
* exit or quit.
*
* Results:
* None.
*
* Side effects:
* Could be almost arbitrary, depending on the command that's
* typed.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
static void
StdinProc(clientData, mask)
ClientData clientData; /* Not used. */
int mask; /* Not used. */
{
#define BUFFER_SIZE 4000
char input[BUFFER_SIZE+1];
static int gotPartial = 0;
char *cmd;
int code, count;
count = read(fileno(stdin), input, BUFFER_SIZE);
if (count <= 0) {
if (!gotPartial) {
if (tty) {
Tcl_Eval(interp, "exit");
exit(1);
} else {
Tk_DeleteFileHandler(0);
}
return;
} else {
count = 0;
}
}
cmd = Tcl_DStringAppend(&command, input, count);
if (count != 0) {
if ((input[count-1] != '\n') && (input[count-1] != ';')) {
gotPartial = 1;
goto prompt;
}
if (!Tcl_CommandComplete(cmd)) {
gotPartial = 1;
goto prompt;
}
}
gotPartial = 0;
/*
* Disable the stdin file 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.
*/
Tk_CreateFileHandler(0, 0, StdinProc, (ClientData) 0);
/* if (memcmp(cmd,"quit",4) || (memcmp(cmd,"exit",4))) { */
code = Tcl_RecordAndEval(interp, cmd, TCL_EVAL_GLOBAL);
/* } else {
printf("Please use the GUI to return control to main program\n");
} */
Tk_CreateFileHandler(0, TK_READABLE, StdinProc, (ClientData) 0);
Tcl_DStringFree(&command);
if (Tcl_GetStringResult(interp) != 0) {
if ((code != TCL_OK) || (tty)) {
/*
* The statement below used to call "printf", but that resulted
* in core dumps under Solaris 2.3 if the result was very long.
*/
puts(Tcl_GetStringResult(interp));
}
}
/*
* Output a prompt.
*/
prompt:
if (tty) {
Prompt(interp, gotPartial);
}
Tcl_ResetResult(interp);
}
/*
*----------------------------------------------------------------------
*
* 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(interp, partial)
Tcl_Interp *interp; /* Interpreter to use for prompting. */
int partial; /* Non-zero means there already
* exists a partial command, so use
* the secondary prompt. */
{
const char *promptCmd;
int code;
promptCmd = Tcl_GetVar(interp,
partial ? "tcl_prompt2" : "tcl_prompt1", TCL_GLOBAL_ONLY);
if (promptCmd == NULL) {
defaultPrompt:
if (!partial) {
fputs("% ", stdout);
}
} else {
code = Tcl_Eval(interp, promptCmd);
if (code != TCL_OK) {
Tcl_AddErrorInfo(interp,
"\n (script that generates prompt)");
fprintf(stderr, "%s\n", Tcl_GetStringResult(interp));
goto defaultPrompt;
}
}
fflush(stdout);
}
|
