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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.
//
//-----------------------------------------------------------------------------
//
// Dehacked "mapping" code
// Allows the fields in structures to be mapped out and accessed by
// name
//
//-----------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "doomtype.h"
#include "i_system.h"
#include "m_misc.h"
#include "deh_mapping.h"
static deh_mapping_entry_t *GetMappingEntryByName(deh_context_t *context,
deh_mapping_t *mapping,
char *name)
{
int i;
for (i=0; mapping->entries[i].name != NULL; ++i)
{
deh_mapping_entry_t *entry = &mapping->entries[i];
if (!strcasecmp(entry->name, name))
{
if (entry->location == NULL)
{
DEH_Warning(context, "Field '%s' is unsupported", name);
return NULL;
}
return entry;
}
}
// Not found.
DEH_Warning(context, "Field named '%s' not found", name);
return NULL;
}
//
// Get the location of the specified field in the specified structure.
//
static void *GetStructField(void *structptr,
deh_mapping_t *mapping,
deh_mapping_entry_t *entry)
{
unsigned int offset;
offset = (uint8_t *)entry->location - (uint8_t *)mapping->base;
return (uint8_t *)structptr + offset;
}
//
// Set the value of a particular field in a structure by name
//
boolean DEH_SetMapping(deh_context_t *context, deh_mapping_t *mapping,
void *structptr, char *name, int value)
{
deh_mapping_entry_t *entry;
void *location;
entry = GetMappingEntryByName(context, mapping, name);
if (entry == NULL)
{
return false;
}
// Sanity check:
if (entry->is_string)
{
DEH_Error(context, "Tried to set '%s' as integer (BUG)", name);
return false;
}
location = GetStructField(structptr, mapping, entry);
// printf("Setting %p::%s to %i (%i bytes)\n",
// structptr, name, value, entry->size);
// Set field content based on its type:
switch (entry->size)
{
case 1:
* ((uint8_t *) location) = value;
break;
case 2:
* ((uint16_t *) location) = value;
break;
case 4:
* ((uint32_t *) location) = value;
break;
default:
DEH_Error(context, "Unknown field type for '%s' (BUG)", name);
return false;
}
return true;
}
//
// Set the value of a string field in a structure by name
//
boolean DEH_SetStringMapping(deh_context_t *context, deh_mapping_t *mapping,
void *structptr, char *name, char *value)
{
deh_mapping_entry_t *entry;
void *location;
entry = GetMappingEntryByName(context, mapping, name);
if (entry == NULL)
{
return false;
}
// Sanity check:
if (!entry->is_string)
{
DEH_Error(context, "Tried to set '%s' as string (BUG)", name);
return false;
}
location = GetStructField(structptr, mapping, entry);
// Copy value into field:
M_StringCopy(location, value, entry->size);
return true;
}
void DEH_StructSHA1Sum(sha1_context_t *context, deh_mapping_t *mapping,
void *structptr)
{
int i;
// Go through each mapping
for (i=0; mapping->entries[i].name != NULL; ++i)
{
deh_mapping_entry_t *entry = &mapping->entries[i];
void *location;
if (entry->location == NULL)
{
// Unsupported field
continue;
}
// Add in data for this field
location = (uint8_t *)structptr + ((uint8_t *)entry->location - (uint8_t *)mapping->base);
switch (entry->size)
{
case 1:
SHA1_UpdateInt32(context, *((uint8_t *) location));
break;
case 2:
SHA1_UpdateInt32(context, *((uint16_t *) location));
break;
case 4:
SHA1_UpdateInt32(context, *((uint32_t *) location));
break;
default:
I_Error("Unknown dehacked mapping field type for '%s' (BUG)",
entry->name);
break;
}
}
}
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