/**

  * $Id$

  * This file is responsible for the main debugger gui frame.

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * 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.

  */

 #include <stdlib.h>

 #include <stdarg.h>

 #include <stdio.h>

 #include <string.h>

 #include <math.h>

 #include <glib/gi18n.h>

 #include <gdk/gdkkeysyms.h>

 #include "mem.h"

 #include "cpu.h"

 #include "dreamcast.h"

 #include "gtkui/gtkui.h"

 #include "sh4/sh4dasm.h"

 #include "aica/armdasm.h"

 GdkColor *msg_colors[] = { &gui_colour_error, &gui_colour_error, &gui_colour_warn, 

 			   &gui_colour_normal,&gui_colour_debug, &gui_colour_trace };

 const cpu_desc_t cpu_list[4] = { &sh4_cpu_desc, &arm_cpu_desc, &armt_cpu_desc, NULL };

 void init_register_list( debug_window_t data );

 uint32_t row_to_address( debug_window_t data, int row );

 int address_to_row( debug_window_t data, uint32_t address );

 void set_disassembly_pc( debug_window_t data, unsigned int pc, gboolean select );

 void set_disassembly_region( debug_window_t data, unsigned int page );

 void set_disassembly_cpu( debug_window_t data, const gchar *cpu );

 void on_mode_field_changed ( GtkEditable *editable, gpointer user_data);

 gboolean on_page_field_key_press_event( GtkWidget * widget, GdkEventKey *event,

                                         gpointer user_data);

 void on_jump_pc_btn_clicked( GtkButton *button, gpointer user_data);

 void on_disasm_list_select_row (GtkCList *clist, gint row, gint column,

 				GdkEvent *event, gpointer user_data);

 void on_disasm_list_unselect_row (GtkCList *clist, gint row, gint column,

 				  GdkEvent *event, gpointer user_data);

 gboolean on_debug_delete_event(GtkWidget *widget, GdkEvent event, gpointer user_data);

 struct debug_window_info {

     int disasm_from;

     int disasm_to;

     int disasm_pc;

     const struct cpu_desc_struct *cpu;

     const cpu_desc_t *cpu_list;

     GtkCList *regs_list;

     GtkCList *disasm_list;

     GtkEntry *page_field;

     GtkWidget *window;

     GtkWidget *statusbar;

     char saved_regs[0];

 };

 debug_window_t debug_window_new( const gchar *title, GtkWidget *menubar, 

 				 GtkWidget *toolbar, GtkAccelGroup *accel_group )

 {

     debug_window_t data = g_malloc0( sizeof(struct debug_window_info) + cpu_list[0]->regs_size );

         GtkWidget *vbox;

     data->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);

     gtk_window_set_default_size (GTK_WINDOW (data->window), 700, 480);

     gtk_window_set_title( GTK_WINDOW(data->window), title );

     gtk_window_add_accel_group (GTK_WINDOW (data->window), accel_group);

     gtk_toolbar_set_style( GTK_TOOLBAR(toolbar), GTK_TOOLBAR_ICONS );

     data->statusbar = gtk_statusbar_new();

     GtkWidget *hpaned = gtk_hpaned_new ();

     gtk_paned_set_position (GTK_PANED (hpaned), 500);

     GtkWidget *disasm_box = gtk_vbox_new(FALSE,0);

     gtk_paned_pack1 (GTK_PANED (hpaned), disasm_box, TRUE, TRUE);

     GtkWidget *hbox1 = gtk_hbox_new (FALSE, 0);

     gtk_box_pack_start (GTK_BOX (disasm_box), hbox1, FALSE, FALSE, 3);

     gtk_box_pack_start (GTK_BOX (hbox1), gtk_label_new (_("Page")), FALSE, FALSE, 4);

     data->page_field = GTK_ENTRY(gtk_entry_new ());

     gtk_box_pack_start (GTK_BOX (hbox1), GTK_WIDGET(data->page_field), FALSE, TRUE, 0);

     GtkWidget *jump_pc_btn = gtk_button_new_with_mnemonic (_(" Jump to PC "));

     gtk_box_pack_start (GTK_BOX (hbox1), jump_pc_btn, FALSE, FALSE, 4);

     gtk_box_pack_start (GTK_BOX (hbox1), gtk_label_new(_("Mode")), FALSE, FALSE, 5);

     GtkWidget *mode_box = gtk_combo_new ();

     gtk_box_pack_start (GTK_BOX (hbox1), mode_box, FALSE, FALSE, 0);

     GList *mode_box_items = NULL;

     mode_box_items = g_list_append (mode_box_items, (gpointer) _("SH4"));

     mode_box_items = g_list_append (mode_box_items, (gpointer) _("ARM7"));

     mode_box_items = g_list_append (mode_box_items, (gpointer) _("ARM7T"));

     gtk_combo_set_popdown_strings (GTK_COMBO (mode_box), mode_box_items);

     g_list_free (mode_box_items);

     GtkWidget *mode_field = GTK_COMBO (mode_box)->entry;

     gtk_editable_set_editable (GTK_EDITABLE (mode_field), FALSE);

     GtkWidget *disasm_scroll = gtk_scrolled_window_new (NULL, NULL);

     gtk_box_pack_start (GTK_BOX (disasm_box), disasm_scroll, TRUE, TRUE, 0);

     gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (disasm_scroll), GTK_SHADOW_IN);

     data->disasm_list = GTK_CLIST(gtk_clist_new (4));

     gtk_clist_set_column_width (GTK_CLIST (data->disasm_list), 0, 80);

     gtk_clist_set_column_width (GTK_CLIST (data->disasm_list), 2, 80);

     gtk_clist_set_column_width (GTK_CLIST (data->disasm_list), 3, 80);

     gtk_clist_set_column_width( data->disasm_list, 1, 16 );

     gtk_clist_column_titles_hide (GTK_CLIST (data->disasm_list));

     gtk_container_add (GTK_CONTAINER (disasm_scroll), GTK_WIDGET(data->disasm_list));

     GtkWidget *reg_scroll = gtk_scrolled_window_new (NULL, NULL);

     gtk_paned_pack2 (GTK_PANED (hpaned), reg_scroll, FALSE, TRUE);

     gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (reg_scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);

     gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (reg_scroll), GTK_SHADOW_IN);

     data->regs_list = GTK_CLIST(gtk_clist_new (2));

     gtk_container_add (GTK_CONTAINER (reg_scroll), GTK_WIDGET(data->regs_list));

     gtk_clist_set_column_width (GTK_CLIST (data->regs_list), 0, 80);

     gtk_clist_set_column_width (GTK_CLIST (data->regs_list), 1, 80);

     gtk_clist_column_titles_hide (GTK_CLIST (data->regs_list));

     gtk_widget_modify_font( GTK_WIDGET(data->regs_list), gui_fixed_font );

     vbox = gtk_vbox_new(FALSE, 0);

     gtk_container_add( GTK_CONTAINER(data->window), vbox );

     gtk_box_pack_start( GTK_BOX(vbox), menubar, FALSE, FALSE, 0 );

     gtk_box_pack_start( GTK_BOX(vbox), toolbar, FALSE, FALSE, 0 );

     gtk_box_pack_start( GTK_BOX(vbox), hpaned, TRUE, TRUE, 0 );

     gtk_box_pack_start( GTK_BOX(vbox), data->statusbar, FALSE, FALSE, 0 );

     g_signal_connect ((gpointer) data->page_field, "key_press_event",

 		      G_CALLBACK (on_page_field_key_press_event),

 		      data);

     g_signal_connect ((gpointer) jump_pc_btn, "clicked",

 		      G_CALLBACK (on_jump_pc_btn_clicked),

 		      data);

     g_signal_connect ((gpointer) mode_field, "changed",

 		      G_CALLBACK (on_mode_field_changed),

 		      data);

     g_signal_connect ((gpointer) data->disasm_list, "select_row",

 		      G_CALLBACK (on_disasm_list_select_row),

 		      data);

     g_signal_connect ((gpointer) data->disasm_list, "unselect_row",

 		      G_CALLBACK (on_disasm_list_unselect_row),

 		      data);

     g_signal_connect ((gpointer) data->window, "delete_event",

 		      G_CALLBACK (on_debug_delete_event),

 		      data);

     data->disasm_from = -1;

     data->disasm_to = -1;

     data->disasm_pc = -1;

     data->cpu = cpu_list[0];

     data->cpu_list = cpu_list;

     init_register_list( data );

     gtk_object_set_data( GTK_OBJECT(data->window), "debug_data", data );

     set_disassembly_pc( data, *data->cpu->pc, FALSE );

     debug_window_set_running( data, FALSE );

     gtk_widget_show_all( data->window );

     return data;

 }

 void debug_window_show( debug_window_t data, gboolean show )

 {

     if( show ) {

 	gtk_widget_show( data->window );

     } else {

 	gtk_widget_hide( data->window );

     }

 }

 int debug_window_get_selected_row( debug_window_t data )

 {

     if( data->disasm_list->selection == NULL ) {

 	return -1;

     } else {

 	return GPOINTER_TO_INT(data->disasm_list->selection->data);

     }

 }

 void init_register_list( debug_window_t data ) 

 {

     int i;

     char buf[20];

     char *arr[2];

     gtk_clist_clear( data->regs_list );

     arr[1] = buf;

     for( i=0; data->cpu->regs_info[i].name != NULL; i++ ) {

         arr[0] = data->cpu->regs_info[i].name;

         if( data->cpu->regs_info->type == REG_INT )

             sprintf( buf, "%08X", *((uint32_t *)data->cpu->regs_info[i].value) );

         else

             sprintf( buf, "%f", *((float *)data->cpu->regs_info[i].value) );

         gtk_clist_append( data->regs_list, arr );

     }

 }

 /*

  * Check for changed registers and update the display

  */

 void debug_window_update( debug_window_t data )

 {

     int i;

     for( i=0; data->cpu->regs_info[i].name != NULL; i++ ) {

         if( data->cpu->regs_info[i].type == REG_INT ) {

             /* Yes this _is_ probably fairly evil */

             if( *((uint32_t *)data->cpu->regs_info[i].value) !=

                 *((uint32_t *)((char *)data->saved_regs + ((char *)data->cpu->regs_info[i].value - (char *)data->cpu->regs))) ) {

                 char buf[20];

                 sprintf( buf, "%08X", *((uint32_t *)data->cpu->regs_info[i].value) );

                 gtk_clist_set_text( data->regs_list, i, 1, buf );

                 gtk_clist_set_foreground( data->regs_list, i, &gui_colour_changed );

             } else {

                 gtk_clist_set_foreground( data->regs_list, i, &gui_colour_normal );

             }

         } else {

             if( *((float *)data->cpu->regs_info[i].value) !=

                 *((float *)((char *)data->saved_regs + ((char *)data->cpu->regs_info[i].value - (char *)data->cpu->regs))) ) {

                 char buf[20];

                 sprintf( buf, "%f", *((float *)data->cpu->regs_info[i].value) );

                 gtk_clist_set_text( data->regs_list, i, 1, buf );

                 gtk_clist_set_foreground( data->regs_list, i, &gui_colour_changed );

             } else {

                 gtk_clist_set_foreground( data->regs_list, i, &gui_colour_normal );

             }

         }

     }

     set_disassembly_pc( data, *data->cpu->pc, TRUE );

     memcpy( data->saved_regs, data->cpu->regs, data->cpu->regs_size );

 }

 void set_disassembly_region( debug_window_t data, unsigned int page )

 {

     uint32_t i, posn, next;

     char buf[80];

     char addr[10];

     char opcode[16] = "";

     char *arr[4] = { addr, " ", opcode, buf };

     unsigned int from = page & 0xFFFFF000;

     unsigned int to = from + 4096;

     gtk_clist_clear(data->disasm_list);

     sprintf( addr, "%08X", from );

     gtk_entry_set_text( data->page_field, addr );

     if( !data->cpu->is_valid_page_func( from ) ) {

         arr[3] = _("This page is currently unmapped");

         gtk_clist_append( data->disasm_list, arr );

         gtk_clist_set_foreground( data->disasm_list, 0, &gui_colour_error );

     } else {

         for( i=from; i<to; i = next ) {

 	    next = data->cpu->disasm_func( i, buf, sizeof(buf), opcode );

             sprintf( addr, "%08X", i );

             posn = gtk_clist_append( data->disasm_list, arr );

             if( buf[0] == '?' )

                 gtk_clist_set_foreground( data->disasm_list, posn, &gui_colour_warn );

 	    if( data->cpu->get_breakpoint != NULL ) {

 		int type = data->cpu->get_breakpoint( i );

 		switch(type) {

 		case BREAK_ONESHOT:

 		    gtk_clist_set_background( data->disasm_list, posn, &gui_colour_temp_break );

 		    break;

 		case BREAK_KEEP:

 		    gtk_clist_set_background( data->disasm_list, posn, &gui_colour_break );

 		    break;

 		}

 	    }

         }

         if( data->disasm_pc != -1 && data->disasm_pc >= from && data->disasm_pc < to )

             gtk_clist_set_foreground( data->disasm_list, address_to_row(data, data->disasm_pc),

                                       &gui_colour_pc );

     }

     if( page != from ) { /* not a page boundary */

         gtk_clist_moveto( data->disasm_list, (page-from)>>1, 0, 0.5, 0.0 );

     }

     data->disasm_from = from;

     data->disasm_to = to;

 }

 void jump_to_disassembly( debug_window_t data, unsigned int addr, gboolean select )

 {

     int row;

     if( addr < data->disasm_from || addr >= data->disasm_to )

         set_disassembly_region(data,addr);

     row = address_to_row( data, addr );

     if(select) {

         gtk_clist_select_row( data->disasm_list, row, 0 );

     }

     if( gtk_clist_row_is_visible( data->disasm_list, row ) != GTK_VISIBILITY_FULL ){

         gtk_clist_moveto( data->disasm_list, row, 0, 0.5, 0.0 );

     }

 }

 void jump_to_pc( debug_window_t data, gboolean select )

 {

     jump_to_disassembly( data, *data->cpu->pc, select );

 }

 void set_disassembly_pc( debug_window_t data, unsigned int pc, gboolean select )

 {

     int row;

     jump_to_disassembly( data, pc, select );

     if( data->disasm_pc != -1 && data->disasm_pc >= data->disasm_from && 

 	data->disasm_pc < data->disasm_to )

         gtk_clist_set_foreground( data->disasm_list, 

 				  (data->disasm_pc - data->disasm_from) / data->cpu->instr_size,

                                   &gui_colour_normal );

     row = address_to_row( data, pc );

     gtk_clist_set_foreground( data->disasm_list, row, &gui_colour_pc );

     data->disasm_pc = pc;

 }

 void set_disassembly_cpu( debug_window_t data, const gchar *cpu )

 {

     int i;

     for( i=0; data->cpu_list[i] != NULL; i++ ) {

 	if( strcmp( data->cpu_list[i]->name, cpu ) == 0 ) {

 	    if( data->cpu != data->cpu_list[i] ) {

 		data->cpu = data->cpu_list[i];

 		data->disasm_from = data->disasm_to = -1; /* Force reload */

 		set_disassembly_pc( data, *data->cpu->pc, FALSE );

 		init_register_list( data );

 	    }

 	    return;

 	}

     }

 }

 void debug_window_toggle_breakpoint( debug_window_t data, int row )

 {

     uint32_t pc = row_to_address( data, row );

     int oldType = data->cpu->get_breakpoint( pc );

     if( oldType != BREAK_NONE ) {

 	data->cpu->clear_breakpoint( pc, oldType );

 	gtk_clist_set_background( data->disasm_list, row, &gui_colour_white );

     } else {

 	data->cpu->set_breakpoint( pc, BREAK_KEEP );

 	gtk_clist_set_background( data->disasm_list, row, &gui_colour_break );

     }

 }

 void debug_window_set_oneshot_breakpoint( debug_window_t data, int row )

 {

     uint32_t pc = row_to_address( data, row );

     data->cpu->clear_breakpoint( pc, BREAK_ONESHOT );

     data->cpu->set_breakpoint( pc, BREAK_ONESHOT );

     gtk_clist_set_background( data->disasm_list, row, &gui_colour_temp_break );

 }

 /**

  * Execute a single instruction using the current CPU mode.

  */

 void debug_window_single_step( debug_window_t data )

 {

     data->cpu->step_func();

     gtk_gui_update();

 }

 uint32_t row_to_address( debug_window_t data, int row ) {

     return data->cpu->instr_size * row + data->disasm_from;

 }

 int address_to_row( debug_window_t data, uint32_t address ) {

     if( data->disasm_from > address || data->disasm_to <= address )

 	return -1;

     return (address - data->disasm_from) / data->cpu->instr_size;

 }

 debug_window_t get_debug_info( GtkWidget *widget ) {

     GtkWidget *win = gtk_widget_get_toplevel(widget);

     debug_window_t data = (debug_window_t)gtk_object_get_data( GTK_OBJECT(win), "debug_data" );

     return data;

 }

 void debug_window_set_running( debug_window_t data, gboolean isRunning ) 

 {

     if( data != NULL ) {

 	gtk_gui_enable_action( "SingleStep", !isRunning );

 	gtk_gui_enable_action( "RunTo", !isRunning && dreamcast_can_run() );

     }

 }

 void on_mode_field_changed ( GtkEditable *editable, gpointer user_data)

 {

     const gchar *text = gtk_entry_get_text( GTK_ENTRY(editable) );

     set_disassembly_cpu( gtk_gui_get_debugger(), text );

 }

 gboolean on_page_field_key_press_event( GtkWidget * widget, GdkEventKey *event,

                                         gpointer user_data)

 {

     if( event->keyval == GDK_Return || event->keyval == GDK_Linefeed ) {

 	debug_window_t data = get_debug_info(widget);

         const gchar *text = gtk_entry_get_text( GTK_ENTRY(widget) );

         gchar *endptr;

         unsigned int val = strtoul( text, &endptr, 16 );

         if( text == endptr ) { /* invalid input */

             char buf[10];

             sprintf( buf, "%08X", row_to_address(data,0) );

             gtk_entry_set_text( GTK_ENTRY(widget), buf );

         } else {

             set_disassembly_region(data, val);

         }

     }

     return FALSE;

 }

 void on_jump_pc_btn_clicked( GtkButton *button, gpointer user_data)

 {

     debug_window_t data = get_debug_info( GTK_WIDGET(button) );

     jump_to_pc( data, TRUE );

 }

 void on_disasm_list_select_row (GtkCList *clist, gint row, gint column,

 				GdkEvent *event, gpointer user_data)

 {

     gtk_gui_enable_action( "SetBreakpoint", TRUE );

     gtk_gui_enable_action( "RunTo", dreamcast_can_run() );

 }

 void on_disasm_list_unselect_row (GtkCList *clist, gint row, gint column,

 				  GdkEvent *event, gpointer user_data)

 {

     gtk_gui_enable_action( "SetBreakpoint", FALSE );

     gtk_gui_enable_action( "RunTo", FALSE );

 }

 gboolean on_debug_delete_event(GtkWidget *widget, GdkEvent event, gpointer user_data)

 {

     gtk_widget_hide( widget );

     return TRUE;

 }