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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2005 Simon Howard
//
// 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.
//
//-----------------------------------------------------------------------------
//
// Parses "Frame" sections in dehacked files
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include "doomtype.h"
#include "d_items.h"
#include "info.h"
#include "deh_defs.h"
#include "deh_io.h"
#include "deh_main.h"
#include "deh_mapping.h"
DEH_BEGIN_MAPPING(state_mapping, state_t)
DEH_MAPPING("Sprite number", sprite)
DEH_MAPPING("Sprite subnumber", frame)
DEH_MAPPING("Duration", tics)
DEH_MAPPING("Next frame", nextstate)
DEH_UNSUPPORTED_MAPPING("Action pointer")
DEH_END_MAPPING
static void *DEH_FrameStart(deh_context_t *context, char *line)
{
int frame_number = 0;
state_t *state;
if (sscanf(line, "Frame %i", &frame_number) != 1)
{
DEH_Warning(context, "Parse error on section start");
return NULL;
}
if (frame_number < 0 || frame_number >= NUMSTATES)
{
DEH_Warning(context, "Invalid frame number: %i", frame_number);
return NULL;
}
if (frame_number >= DEH_VANILLA_NUMSTATES)
{
DEH_Warning(context, "Attempt to modify frame %i: this will cause "
"problems in Vanilla dehacked.", frame_number);
}
state = &states[frame_number];
return state;
}
// Simulate a frame overflow: Doom has 967 frames in the states[] array, but
// DOS dehacked internally only allocates memory for 966. As a result,
// attempts to set frame 966 (the last frame) will overflow the dehacked
// array and overwrite the weaponinfo[] array instead.
//
// This is noticable in Batman Doom where it is impossible to switch weapons
// away from the fist once selected.
static void DEH_FrameOverflow(deh_context_t *context, char *varname, int value)
{
if (!strcasecmp(varname, "Duration"))
{
weaponinfo[0].ammo = value;
}
else if (!strcasecmp(varname, "Codep frame"))
{
weaponinfo[0].upstate = value;
}
else if (!strcasecmp(varname, "Next frame"))
{
weaponinfo[0].downstate = value;
}
else if (!strcasecmp(varname, "Unknown 1"))
{
weaponinfo[0].readystate = value;
}
else if (!strcasecmp(varname, "Unknown 2"))
{
weaponinfo[0].atkstate = value;
}
else
{
DEH_Error(context, "Unable to simulate frame overflow: field '%s'",
varname);
}
}
static void DEH_FrameParseLine(deh_context_t *context, char *line, void *tag)
{
state_t *state;
char *variable_name, *value;
int ivalue;
if (tag == NULL)
return;
state = (state_t *) tag;
// Parse the assignment
if (!DEH_ParseAssignment(line, &variable_name, &value))
{
// Failed to parse
DEH_Warning(context, "Failed to parse assignment");
return;
}
// all values are integers
ivalue = atoi(value);
if (state == &states[NUMSTATES - 1])
{
DEH_FrameOverflow(context, variable_name, ivalue);
}
else
{
// set the appropriate field
DEH_SetMapping(context, &state_mapping, state, variable_name, ivalue);
}
}
static void DEH_FrameSHA1Sum(sha1_context_t *context)
{
int i;
for (i=0; i<NUMSTATES; ++i)
{
DEH_StructSHA1Sum(context, &state_mapping, &states[i]);
}
}
deh_section_t deh_section_frame =
{
"Frame",
NULL,
DEH_FrameStart,
DEH_FrameParseLine,
NULL,
DEH_FrameSHA1Sum,
};
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