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//
// Copyright(C) 2005-2014 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.
//
//
// Parses Text substitution sections in dehacked files
//
#include <stdio.h>
#include <string.h>
#include "doomtype.h"
#include "z_zone.h"
#include "deh_defs.h"
#include "deh_io.h"
#include "deh_main.h"
// Given a string length, find the maximum length of a
// string that can replace it.
static int TXT_MaxStringLength(int len)
{
// Enough bytes for the string and the NUL terminator
len += 1;
// All strings in doom.exe are on 4-byte boundaries, so we may be able
// to support a slightly longer string.
// Extend up to the next 4-byte boundary
len += (4 - (len % 4)) % 4;
// Less one for the NUL terminator.
return len - 1;
}
static void *DEH_TextStart(deh_context_t *context, char *line)
{
char *from_text, *to_text;
int fromlen, tolen;
int i;
if (sscanf(line, "Text %i %i", &fromlen, &tolen) != 2)
{
DEH_Warning(context, "Parse error on section start");
return NULL;
}
// Only allow string replacements that are possible in Vanilla Doom.
// Chocolate Doom is unforgiving!
if (!deh_allow_long_strings && tolen > TXT_MaxStringLength(fromlen))
{
DEH_Error(context, "Replacement string is longer than the maximum "
"possible in doom.exe");
return NULL;
}
from_text = Z_Malloc(fromlen + 1, PU_STATIC, NULL);
to_text = Z_Malloc(tolen + 1, PU_STATIC, NULL);
// read in the "from" text
for (i=0; i<fromlen; ++i)
{
int c;
c = DEH_GetChar(context);
from_text[i] = c;
}
from_text[fromlen] = '\0';
// read in the "to" text
for (i=0; i<tolen; ++i)
{
int c;
c = DEH_GetChar(context);
to_text[i] = c;
}
to_text[tolen] = '\0';
DEH_AddStringReplacement(from_text, to_text);
return NULL;
}
static void DEH_TextParseLine(deh_context_t *context, char *line, void *tag)
{
// not used
}
deh_section_t deh_section_text =
{
"Text",
NULL,
DEH_TextStart,
DEH_TextParseLine,
NULL,
NULL,
};
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