quakeforge/libs/gamecode/builtins/bi_inputline.c

/*
	bi_inputline.c

	CSQC inputline builtins

	Copyright (C) 1996-1997  Id Software, Inc.

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

static __attribute__ ((unused)) const char rcsid[] = 
	"$Id$";

#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include "QF/console.h"
#include "QF/csqc.h"
#include "QF/draw.h"
#include "QF/progs.h"
#include "QF/sys.h"
#include "QF/zone.h"

typedef struct {
	inputline_t **lines;
	int         max_lines;
	void      (*draw)(inputline_t *il);
} il_resources_t;

//FIXME need to robustify the interface to avoid segfaults caused by errant
//progs

static inputline_t *
get_inputline (progs_t *pr, int arg, const char *func)
{
	pr_type_t  *handle;
	inputline_t *line;
	int          min = (pr_type_t *) pr->zone - pr->pr_globals;
	int          max = min + pr->zone_size / sizeof (pr_type_t);

	if (arg <= min || arg >= max)
		PR_RunError (pr, "%s: Invalid inputline_t: $%x $%x $%x", func, arg,
					 min, max);

	handle = pr->pr_globals + arg;

	line = *(inputline_t **)handle;
	if (!line)
		PR_RunError (pr, "Invalid inputline_t");

	return line;
}

static void
bi_InputLine_Create (progs_t *pr)
{
	il_resources_t *res = PR_Resources_Find (pr, "InputLine");
	inputline_t **line = 0;
	int         i;
	int         lines = P_INT (pr, 0);
	int         size = P_INT (pr, 1);
	int         prompt = P_INT (pr, 2);
	pr_type_t  *handle;

	for (i = 0; i < res->max_lines; i++)
		if (!res->lines[i]) {
			line = &res->lines[i];
			break;
		}
	if (!line) {
		Sys_Printf ("out of resources\n");
		R_INT (pr) = 0;
		return;
	}
	*line = Con_CreateInputLine (lines, size, prompt);
	if (!*line) {
		Sys_Printf ("failed to create inputline\n");
		R_INT (pr) = 0;
		return;
	}
	(*line)->draw = res->draw;
	handle = PR_Zone_Malloc (pr, sizeof (inputline_t *));
	*(inputline_t**)handle = *line;
	R_INT (pr) = handle - pr->pr_globals;
}

static void
bi_InputLine_SetUserData (progs_t *pr)
{
	inputline_t *line = get_inputline (pr, P_INT (pr, 0),
									   "InputLine_SetWidth");
	pr_type_t  *data = P_GPOINTER (pr, 1);

	line->user_data = data;
}

static void
bi_InputLine_SetWidth (progs_t *pr)
{
	inputline_t *line = get_inputline (pr, P_INT (pr, 0),
									   "InputLine_SetWidth");
	int         width = P_INT (pr, 1);

	line->width = width;
}

static void
bi_InputLine_Destroy (progs_t *pr)
{
	il_resources_t *res = PR_Resources_Find (pr, "InputLine");
	pr_type_t  *handle;
	int         arg = P_INT (pr, 0);
	int         i;
	inputline_t *line;

	if (arg <= ((pr_type_t *) pr->zone - pr->pr_globals)
		|| (size_t) arg >= (pr->zone_size / sizeof (pr_type_t)))
		PR_RunError (pr, "InputLine_Destroy: Invalid inputline_t");

	handle = pr->pr_globals + arg;

	line = *(inputline_t **)handle;
	if (!line)
		PR_RunError (pr, "InputLine_Destroy: Invalid inputline_t");

	for (i = 0; i < res->max_lines; i++)
		if (res->lines[i] == line) {
			Con_DestroyInputLine (line);
			res->lines = 0;
			PR_Zone_Free (pr, handle);
		}
}

static void
bi_InputLine_Clear (progs_t *pr)
{
	inputline_t *line = get_inputline (pr, P_INT (pr, 0), "InputLine_Clear");
	int         save = P_INT (pr, 1);

	Con_ClearTyping (line, save);
}

static void
bi_InputLine_Process (progs_t *pr)
{
	inputline_t *line = get_inputline (pr, P_INT (pr, 0), "InputLine_Process");
	int         ch = P_INT (pr, 1);

	Con_ProcessInputLine (line, ch);
}

/*
	bi_InputLine_SetText

	Sets the inputline to a specified text
*/
static void
bi_InputLine_SetText (progs_t *pr)
{
	inputline_t *il = get_inputline (pr, P_INT (pr, 0), "InputLine_SetText");
	const char  *str = P_GSTRING (pr, 1);

	/* this was segfault trap:
		 il->lines[il->edit_line][0] is promt character
	*/
	strncpy(il->lines[il->edit_line] + 1,str,il->line_size - 1);
	il->lines[il->edit_line][il->line_size-1] = '\0';
}

/*
	bi_InputLine_GetText

	Gets the text from a inputline 
*/
static void
bi_InputLine_GetText (progs_t *pr)
{
	inputline_t *il = get_inputline (pr, P_INT (pr, 0), "InputLine_GetText");

	RETURN_STRING(pr, il->lines[il->edit_line]+1);
}

static void
bi_InputLine_Draw (progs_t *pr)
{
	inputline_t *il = get_inputline (pr, P_INT (pr, 0), "InputLine_Draw");

	il->draw (il);
}

static void
bi_il_clear (progs_t *pr, void *data)
{
	il_resources_t *res = (il_resources_t *)data;
	int         i;

	for (i = 0; i < res->max_lines; i++)
		if (res->lines[i]) {
			Con_DestroyInputLine (res->lines[i]);
			res->lines[i] = 0;
		}
}

static builtin_t builtins[] = {
	{"InputLine_Create",		bi_InputLine_Create,		-1},
	{"InputLine_SetUserData",	bi_InputLine_SetUserData,	-1},
	{"InputLine_SetWidth",		bi_InputLine_SetWidth,		-1},
	{"InputLine_SetText",		bi_InputLine_SetText,		-1},
	{"InputLine_GetText",		bi_InputLine_GetText,		-1},
	{"InputLine_Destroy",		bi_InputLine_Destroy,		-1},
	{"InputLine_Clear",			bi_InputLine_Clear,			-1},
	{"InputLine_Process",		bi_InputLine_Process,		-1},
	{"InputLine_Draw",			bi_InputLine_Draw,			-1},
	{0}
};

void
InputLine_Progs_Init (progs_t *pr)
{
	il_resources_t *res = malloc (sizeof (il_resources_t));
	res->max_lines = 64;
	res->lines = calloc (sizeof (inputline_t *), res->max_lines);

	PR_Resources_Register (pr, "InputLine", res, bi_il_clear);
	PR_RegisterBuiltins (pr, builtins);
}

void
InputLine_Progs_SetDraw (progs_t *pr, void (*draw)(inputline_t *))
{
	il_resources_t *res = PR_Resources_Find (pr, "InputLine");
	res->draw = draw;
}