scummvm/common/debugger.cpp
Max Horn 22c22d1e81 added namespace GUI
svn-id: r11255
2003-11-10 23:40:48 +00:00

359 lines
9.3 KiB
C++

/* ScummVM - Scumm Interpreter
* Copyright (C) 2001-2003 The ScummVM project
*
* 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.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/debugger.h"
#if USE_CONSOLE
#include "gui/console.h"
#endif
#ifdef _WIN32_WCE
extern void force_keyboard(bool);
#endif
namespace Common {
template <class T>
Debugger<T>::Debugger() {
_frame_countdown = 0;
_dvar_count = 0;
_dcmd_count = 0;
_detach_now = false;
_isAttached = false;
_errStr = NULL;
_firstTime = true;
_debuggerDialog = new GUI::ConsoleDialog(1.0, 0.67F);
_debuggerDialog->setInputCallback(debuggerInputCallback, this);
_debuggerDialog->setCompletionCallback(debuggerCompletionCallback, this);
}
template <class T>
Debugger<T>::~Debugger() {
delete _debuggerDialog;
}
// Initialisation Functions
template <class T>
int Debugger<T>::DebugPrintf(const char *format, ...) {
va_list argptr;
va_start(argptr, format);
int count;
#if USE_CONSOLE
count = _debuggerDialog->vprintf(format, argptr);
#else
count = ::vprintf(format, argptr);
#endif
va_end (argptr);
return count;
}
template <class T>
void Debugger<T>::attach(const char *entry) {
#ifdef _WIN32_WCE
force_keyboard(true);
#endif
if (entry) {
_errStr = strdup(entry);
}
_frame_countdown = 1;
_detach_now = false;
_isAttached = true;
}
template <class T>
void Debugger<T>::detach() {
#ifdef _WIN32_WCE
force_keyboard(false);
#endif
_detach_now = false;
_isAttached = false;
}
// Temporary execution handler
template <class T>
void Debugger<T>::onFrame() {
if (_frame_countdown == 0)
return;
--_frame_countdown;
if (!_frame_countdown) {
preEnter();
enter();
postEnter();
// Detach if we're finished with the debugger
if (_detach_now)
detach();
}
}
// Main Debugger Loop
template <class T>
void Debugger<T>::enter() {
#if USE_CONSOLE
if (_firstTime) {
DebugPrintf("Debugger started, type 'exit' to return to the game.\n");
DebugPrintf("Type 'help' to see a little list of commands and variables.\n");
_firstTime = false;
}
if (_errStr) {
DebugPrintf("ERROR: %s\n\n", _errStr);
free(_errStr);
_errStr = NULL;
}
_debuggerDialog->runModal();
#else
// TODO: compared to the console input, this here is very bare bone.
// For example, no support for tab completion and no history. At least
// we should re-add (optional) support for the readline library.
// Or maybe instead of choosing between a console dialog and stdio,
// we should move that choice into the ConsoleDialog class - that is,
// the console dialog code could be #ifdef'ed to not print to the dialog
// but rather to stdio. This way, we could also reuse the command history
// and tab completion of the console. It would still require a lot of
// work, but at least no dependency on a 3rd party library...
printf("Debugger entered, please switch to this console for input.\n");
int i;
char buf[256];
do {
printf("debug> ");
if (!fgets(buf, sizeof(buf), stdin))
return;
i = strlen(buf);
while (i > 0 && buf[i - 1] == '\n')
buf[--i] = 0;
if (i == 0)
continue;
} while (RunCommand(buf));
#endif
}
// Command execution loop
template <class T>
bool Debugger<T>::RunCommand(const char *inputOrig) {
int i = 0, num_params = 0;
const char *param[256];
char *input = strdup(inputOrig); // One of the rare occasions using strdup is OK (although avoiding strtok might be more elegant here).
// Parse out any params
char *tok = strtok(input, " ");
if (tok) {
do {
param[num_params++] = tok;
} while ((tok = strtok(NULL, " ")) != NULL);
} else {
param[num_params++] = input;
}
for (i=0; i < _dcmd_count; i++) {
if (!strcmp(_dcmds[i].name, param[0])) {
bool result = (((T *)this)->*_dcmds[i].function)(num_params, param);
free(input);
return result;
}
}
// It's not a command, so things get a little tricky for variables. Do fuzzy matching to ignore things like subscripts.
for (i = 0; i < _dvar_count; i++) {
if (!strncmp(_dvars[i].name, param[0], strlen(_dvars[i].name))) {
if (num_params > 1) {
// Alright, we need to check the TYPE of the variable to deref and stuff... the array stuff is a bit ugly :)
switch(_dvars[i].type) {
// Integer
case DVAR_INT:
*(int *)_dvars[i].variable = atoi(param[1]);
DebugPrintf("(int)%s = %d\n", param[0], *(int *)_dvars[i].variable);
break;
// Integer Array
case DVAR_INTARRAY: {
char *chr = strchr(param[0], '[');
if (!chr) {
DebugPrintf("You must access this array as %s[element]\n", param[0]);
} else {
int element = atoi(chr+1);
int32 *var = *(int32 **)_dvars[i].variable;
if (element > _dvars[i].optional) {
DebugPrintf("%s is out of range (array is %d elements big)\n", param[0], _dvars[i].optional);
} else {
var[element] = atoi(param[1]);
DebugPrintf("(int)%s = %d\n", param[0], var[element]);
}
}
}
break;
default:
DebugPrintf("Failed to set variable %s to %s - unknown type\n", _dvars[i].name, param[1]);
break;
}
} else {
// And again, type-dependent prints/defrefs. The array one is still ugly.
switch(_dvars[i].type) {
// Integer
case DVAR_INT:
DebugPrintf("(int)%s = %d\n", param[0], *(int *)_dvars[i].variable);
break;
// Integer array
case DVAR_INTARRAY: {
char *chr = strchr(param[0], '[');
if (!chr) {
DebugPrintf("You must access this array as %s[element]\n", param[0]);
} else {
int element = atoi(chr+1);
int16 *var = *(int16 **)_dvars[i].variable;
if (element > _dvars[i].optional) {
DebugPrintf("%s is out of range (array is %d elements big)\n", param[0], _dvars[i].optional);
} else {
DebugPrintf("(int)%s = %d\n", param[0], var[element]);
}
}
}
break;
// String
case DVAR_STRING:
DebugPrintf("(string)%s = %s\n", param[0], ((Common::String *)_dvars[i].variable)->c_str());
break;
default:
DebugPrintf("%s = (unknown type)\n", param[0]);
break;
}
}
free(input);
return true;
}
}
DebugPrintf("Unknown command or variable\n");
free(input);
return true;
}
// returns true if something has been completed
// completion has to be delete[]-ed then
template <class T>
bool Debugger<T>::TabComplete(const char *input, char*& completion) {
// very basic tab completion
// for now it just supports command completions
// adding completions of command parameters would be nice (but hard) :-)
// maybe also give a list of possible command completions?
// (but this will require changes to console)
if (strchr(input, ' '))
return false; // already finished the first word
unsigned int inputlen = strlen(input);
unsigned int matchlen = 0;
char match[30]; // the max. command name is 30 chars
for (int i = 0; i < _dcmd_count; i++) {
if (!strncmp(_dcmds[i].name, input, inputlen)) {
unsigned int commandlen = strlen(_dcmds[i].name);
if (commandlen == inputlen) { // perfect match
return false;
}
if (commandlen > inputlen) { // possible match
// no previous match
if (matchlen == 0) {
strcpy(match, _dcmds[i].name + inputlen);
matchlen = commandlen - inputlen;
} else {
// take common prefix of previous match and this command
unsigned int j;
for (j = 0; j < matchlen; j++) {
if (match[j] != _dcmds[i].name[inputlen + j]) break;
}
matchlen = j;
}
if (matchlen == 0)
return false;
}
}
}
if (matchlen == 0)
return false;
completion = new char[matchlen + 1];
memcpy(completion, match, matchlen);
completion[matchlen] = 0;
return true;
}
// Variable registration function
template <class T>
void Debugger<T>::DVar_Register(const char *varname, void *pointer, int type, int optional) {
assert(_dvar_count < (int)sizeof(_dvars));
strcpy(_dvars[_dvar_count].name, varname);
_dvars[_dvar_count].type = type;
_dvars[_dvar_count].variable = pointer;
_dvars[_dvar_count].optional = optional;
_dvar_count++;
}
// Command registration function
template <class T>
void Debugger<T>::DCmd_Register(const char *cmdname, DebugProc pointer) {
assert(_dcmd_count < (int)sizeof(_dcmds));
strcpy(_dcmds[_dcmd_count].name, cmdname);
_dcmds[_dcmd_count].function = pointer;
_dcmd_count++;
}
// Console handler
#if USE_CONSOLE
template <class T>
bool Debugger<T>::debuggerInputCallback(GUI::ConsoleDialog *console, const char *input, void *refCon) {
Debugger *debugger = (Debugger *)refCon;
return debugger->RunCommand(input);
}
template <class T>
bool Debugger<T>::debuggerCompletionCallback(GUI::ConsoleDialog *console, const char *input, char*& completion, void *refCon) {
Debugger *debugger = (Debugger *)refCon;
return debugger->TabComplete(input, completion);
}
#endif
} // End of namespace Common