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tdewebdev/kxsldbg/kxsldbgpart/libqtnotfier/xsldbgthread.cpp

361 lines
9.4 KiB

/***************************************************************************
xsldbgthread.cpp - description
-------------------
begin : Thu Dec 20 2001
copyright : (C) 2001 by keith
email : keith@linux
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "config.h"
#include <pthread.h> /* need to create/work with process thread */
#include <errno.h> /* need for EAGAIN */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <libxml/xmlerror.h>
#include "../libxsldbg/breakpoint.h"
#include "../libxsldbg/xsldbgmsg.h"
#include "../libxsldbg/xsldbgthread.h"
#include "../libxsldbg/qtnotifier2.h"
#ifdef HAVE_READLINE
#include <readline/readline.h>
#ifdef HAVE_HISTORY
#include <readline/history.h>
#endif
#endif
#define DEBUG_BUFFER_SIZE 500
static char inputBuffer[DEBUG_BUFFER_SIZE];
static char outputBuffer[DEBUG_BUFFER_SIZE];
/*the major structure to hold information about the process thread */
pthread_t mythread;
/* The reader for stdout */
pthread_t stdoutReaderThread;
FILE *stdoutIO = NULL;
/* -----------------------------------------------
private functions
---------------------------------------------------*/
extern "C" {
/**
* xsldbgGenericErrorFunc:
* @ctx: Is Valid
* @msg: Is valid
* @...: other parameters to use
*
* Handles print output from xsldbg and passes it to the application
*/
void
xsldbgGenericErrorFunc(void *ctx, const char *msg, ...);
xmlChar * qtXslDbgShellReadline(xmlChar * prompt);
}
/* -----------------------------------------------
end functions
---------------------------------------------------*/
/* setup all application wide items */
int
xsldbgThreadInit(void)
{
int result = 0;
fprintf(stderr, "mainInit()\n");
xsltSetGenericErrorFunc(0, xsldbgGenericErrorFunc);
setThreadStatus(XSLDBG_MSG_THREAD_INIT);
xsldbgSetAppFunc(qtNotifyXsldbgApp);
xsldbgSetAppStateFunc(qtNotifyStateXsldbgApp);
xsldbgSetTextFunc(qtNotifyTextXsldbgApp);
xsldbgSetReadlineFunc(qtXslDbgShellReadline);
/* create the thread */
if (pthread_create(&mythread, NULL, xsldbgThreadMain, NULL) != EAGAIN) {
int counter;
for (counter = 0; counter < 11; counter++){
if (getThreadStatus() != XSLDBG_MSG_THREAD_INIT)
break;
usleep(250000); /*guess that it will take at most 2.5 seconds to startup */
}
/* xsldbg should have started by now if it can */
if (getThreadStatus() == XSLDBG_MSG_THREAD_RUN){
fprintf(stderr, "Created thread\n");
result++;
}else
fprintf(stderr, "Thread did not start\n");
} else {
fprintf(stderr, "Failed to create thread\n");
}
return result;
}
/* tell the thread to stop and free that memory !*/
void
xsldbgThreadFree(void)
{
fprintf(stderr, "xsldbgThreadFree()\n");
if (getThreadStatus() != XSLDBG_MSG_THREAD_DEAD)
{
int counter;
fprintf(stderr, "Killing xsldbg thread\n");
setThreadStatus(XSLDBG_MSG_THREAD_STOP);
for (counter = 0; counter < 11; counter++){
if (getThreadStatus() == XSLDBG_MSG_THREAD_DEAD)
break;
usleep(250000); /*guess that it will take at most 2.5 seconds to stop */
}
}
}
const char *getFakeInput()
{
return inputBuffer;
}
/* put text into standard input just like we had typed it */
int
fakeInput(const char *text)
{
int result = 0;
if (!text || (getInputReady() == 1) || (getThreadStatus() != XSLDBG_MSG_THREAD_RUN))
return result;
// fprintf(stderr, "\nFaking input of \"%s\"\n", text);
strncpy(inputBuffer, text, sizeof(inputBuffer));
setInputReady(1);
result++;
return result;
}
/* use this function instead of the one that was in debugXSL.c */
/**
* qtXslDbgShellReadline:
* @prompt: the prompt value
*
* Read a string
*
* Returns a copy of the text inputed or NULL if EOF in stdin found.
* The caller is expected to free the returned string.
*/
xmlChar *
qtXslDbgShellReadline(xmlChar * prompt)
{
const char *inputReadBuff;
static char last_read[DEBUG_BUFFER_SIZE] = { '\0' };
if (getThreadStatus() != XSLDBG_MSG_THREAD_RUN)
{
#ifdef HAVE_READLINE
xmlChar *line_read;
/* Get a line from the user. */
line_read = (xmlChar *) readline((char *) prompt);
/* If the line has any text in it, save it on the history. */
if (line_read && *line_read) {
add_history((char *) line_read);
strncpy((char*)last_read, (char*)line_read, DEBUG_BUFFER_SIZE - 1);
} else {
/* if only <Enter>is pressed then try last saved command line */
line_read = (xmlChar *) xmlMemStrdup(last_read);
}
return (line_read);
#else
char line_read[DEBUG_BUFFER_SIZE];
if (prompt != NULL)
xsltGenericError(xsltGenericErrorContext, "%s", prompt);
if (!fgets(line_read, DEBUG_BUFFER_SIZE - 1, stdin))
return (NULL);
line_read[DEBUG_BUFFER_SIZE - 1] = 0;
/* if only <Enter>is pressed then try last saved command line */
if ((strlen(line_read) == 0) || (line_read[0] == '\n')) {
strcpy(line_read, last_read);
} else {
strcpy(last_read, line_read);
}
return (xmlChar *) xmlMemStrdup(line_read);
#endif
}
else{
setInputStatus(XSLDBG_MSG_AWAITING_INPUT);
notifyXsldbgApp(XSLDBG_MSG_AWAITING_INPUT, NULL);
while (getInputReady() == 0){
usleep(10000);
/* have we been told to die */
if (getThreadStatus() == XSLDBG_MSG_THREAD_STOP){
fprintf(stderr, "About to stop thread\n");
xslDebugStatus = DEBUG_TQUIT;
return NULL;
}
}
setInputStatus(XSLDBG_MSG_READ_INPUT);
inputReadBuff = getFakeInput();
if(inputReadBuff){
notifyXsldbgApp(XSLDBG_MSG_READ_INPUT, inputReadBuff);
return (xmlChar*)xmlMemStrdup(inputReadBuff);
}else{
return NULL;
}
}
}
xsldbgErrorMsg msg;
xsldbgErrorMsgPtr msgPtr = &msg;
xmlChar *msgText = NULL;
int qtNotifyStateXsldbgApp(XsldbgMessageEnum type, int commandId,
XsldbgCommandStateEnum commandState, const char *text)
{
int result = 0;
msg.type = type;
msg.commandId = commandId;
msg.commandState = commandState;
if (text != NULL)
{
msg.text = (xmlChar*)xmlMemStrdup(text);
if (msg.text == NULL)
return result; /* out of memory */
}
else
msg.text = NULL;
notifyXsldbgApp(XSLDBG_MSG_PROCESSING_RESULT, msgPtr);
if (msg.text != NULL)
{
xmlFree(msg.text);
msg.text = NULL;
}
result = 1;
return result;
}
int qtNotifyTextXsldbgApp(XsldbgMessageEnum type, const char *text)
{
return qtNotifyStateXsldbgApp(type, -1, XSLDBG_COMMAND_NOTUSED, text);
}
char mainBuffer[DEBUG_BUFFER_SIZE];
static void xsldbgThreadCleanupTQt(void);
/* this is where the thread get to do all its work */
void *
xsldbgThreadMain(void *)
{
// int defaultArgc = 2;
// char *defaultArgv[2];
// int i;
if (getThreadStatus() != XSLDBG_MSG_THREAD_INIT){
fprintf(stderr, "xsldbg thread is not ready to be started. Or one is already running.\n");
return NULL; /* we can't start more than one thread of xsldbg */
}
// defaultArgv[0] = xmlMemStrdup("xsldbg");
// defaultArgv[1] = xmlMemStrdup("--shell");
/*
defaultArgv[2] = xmlMemStrdup("xsldoc.xsl");
defaultArgv[3] = xmlMemStrdup("xsldoc.xml");
*/
/* for (i = 0; i < defaultArgc; i++){
if (defaultArgv[i] == NULL){
fprintf(stderr, "Start thread failed. Unable to create xsldbg arguments\n");
return NULL;
}
}
*/
xsldbgSetThreadCleanupFunc(xsldbgThreadCleanupTQt);
setThreadStatus(XSLDBG_MSG_THREAD_RUN);
setInputStatus(XSLDBG_MSG_AWAITING_INPUT);
fprintf(stderr, "Starting thread\n");
/* call the "main of xsldbg" found in debugXSL.c */
// xsldbgMain(defaultArgc, defaultArgv);
xsldbgMain(0,0);
fprintf(stderr, "Stopping thread\n");
/*
for (i = 0; i < defaultArgc; i++){
xmlFree(defaultArgv[i]);
}
*/
setThreadStatus(XSLDBG_MSG_THREAD_DEAD);
setInputStatus(XSLDBG_MSG_PROCESSING_INPUT);
notifyXsldbgApp(XSLDBG_MSG_THREAD_DEAD, NULL);
return NULL;
}
/* thread has died so cleanup after it not called directly but via
notifyXsldbgApp*/
void
xsldbgThreadCleanupTQt(void)
{
fprintf(stderr, "Thread has finished\n");
if (getThreadStatus() == XSLDBG_MSG_THREAD_RUN)
{
xsldbgThreadFree();
}
/* its safe to modify threadStatus as the thread is now dead */
setThreadStatus(XSLDBG_MSG_THREAD_DEAD);
}
void *
xsldbgThreadStdoutReader(void *data)
{
if (!stdoutIO)
return data;
while (getThreadStatus() == XSLDBG_MSG_THREAD_RUN){
if (fgets(outputBuffer, sizeof(outputBuffer -1), stdoutIO)){
usleep(10000);
strcat(outputBuffer, "\n");
notifyTextXsldbgApp(XSLDBG_MSG_TEXTOUT, outputBuffer);
}else{
fprintf(stderr, "Unable to read from stdout from xsldbg\n");
break;
}
}
return data;
}