def_read.cpp

/** @file def_read.cpp
 *
 * Doomsday Engine Definition File Reader.
 *
 * A GHASTLY MESS!!! This should be rewritten.
 *
 * You have been warned!
 *
 * At the moment the idea is that a lot of macros are used to read a more
 * or less fixed structure of definitions, and if an error occurs then
 * "goto out_of_here;". It leads to a lot more code than an elegant parser
 * would require.
 *
 * The current implementation of the reader is a "structural" approach:
 * the definition file is parsed based on the structure implied by
 * the read tokens. A true parser would have syntax definitions for
 * a bunch of tokens, and the same parsing rules would be applied for
 * everything.
 *
 * @authors Copyright &copy; 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
 * @authors Copyright &copy; 2010-2013 Daniel Swanson <danij@dengine.net>
 *
 * @par License
 * GPL: http://www.gnu.org/licenses/gpl.html
 *
 * <small>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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA</small>
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "de_base.h"
#include "de_console.h"
#include "de_system.h"
#include "de_filesys.h"
#include "de_misc.h"
#include "de_defs.h"

// XGClass.h is actually a part of the engine.
#include "../../../plugins/common/include/xgclass.h"

#include <de/NativePath>
#include <de/memory.h>

using namespace de;

#define MAX_RECUR_DEPTH     30
#define MAX_TOKEN_LEN       128

// Some macros.
#define STOPCHAR(x) (isspace(x) || x == ';' || x == '#' || x == '{' \
                    || x == '}' || x == '=' || x == '"' || x == '*' \
                    || x == '|')

#define ISTOKEN(X)  (!stricmp(token, X))

#define READSTR(X)  if(!ReadString(X, sizeof(X))) { \
                    SetError("Syntax error in string value."); \
                    retVal = false; goto ded_end_read; }


#define READURI(X, SHM) if(!ReadUri(X, SHM)) { \
    SetError("Syntax error parsing resource path."); \
    retVal = false; goto ded_end_read; }

#define MISSING_SC_ERROR    SetError("Missing semicolon."); \
                            retVal = false; goto ded_end_read;

#define CHECKSC     if(source->version <= 5) { ReadToken(); if(!ISTOKEN(";")) { MISSING_SC_ERROR; } }

#define FINDBEGIN   while(!ISTOKEN("{") && !source->atEnd) ReadToken();
#define FINDEND     while(!ISTOKEN("}") && !source->atEnd) ReadToken();

#define ISLABEL(X)  (!stricmp(label, X))

#define READLABEL   if(!ReadLabel(label)) { retVal = false; goto ded_end_read; } \
                    if(ISLABEL("}")) break;

#define READLABEL_NOBREAK   if(!ReadLabel(label)) { retVal = false; goto ded_end_read; }

#define FAILURE     retVal = false; goto ded_end_read;
#define READBYTE(X) if(!ReadByte(&X)) { FAILURE }
#define READINT(X)  if(!ReadInt(&X, false)) { FAILURE }
#define READUINT(X) if(!ReadInt(&X, true)) { FAILURE }
#define READFLT(X)  if(!ReadFloat(&X)) { FAILURE }
#define READNBYTEVEC(X,N) if(!ReadNByteVector(X, N)) { FAILURE }
#define READFLAGS(X,P) if(!ReadFlags(&X, P)) { FAILURE }
#define READBLENDMODE(X) if(!ReadBlendmode(&X)) { FAILURE }
#define READSTRING(S,I) if(!ReadString(S,sizeof(S))) { I = strtol(token,0,0); }

#define RV_BYTE(lab, X) if(ISLABEL(lab)) { READBYTE(X); } else
#define RV_INT(lab, X)  if(ISLABEL(lab)) { READINT(X); } else
#define RV_UINT(lab, X) if(ISLABEL(lab)) { READUINT(X); } else
#define RV_FLT(lab, X)  if(ISLABEL(lab)) { READFLT(X); } else
#define RV_VEC(lab, X, N)   if(ISLABEL(lab)) { int b; FINDBEGIN; \
                        for(b=0; b<N; ++b) {READFLT(X[b])} ReadToken(); } else
#define RV_IVEC(lab, X, N)  if(ISLABEL(lab)) { int b; FINDBEGIN; \
                        for(b=0; b<N; ++b) {READINT(X[b])} ReadToken(); } else
#define RV_NBVEC(lab, X, N) if(ISLABEL(lab)) { READNBYTEVEC(X,N); } else
#define RV_STR(lab, X)  if(ISLABEL(lab)) { READSTR(X); } else
#define RV_STR_INT(lab, S, I)   if(ISLABEL(lab)) { if(!ReadString(S,sizeof(S))) \
                                I = strtol(token,0,0); } else
#define RV_URI(lab, X, RN)  if(ISLABEL(lab)) { READURI(X, RN); } else
#define RV_FLAGS(lab, X, P) if(ISLABEL(lab)) { READFLAGS(X, P); } else
#define RV_BLENDMODE(lab, X) if(ISLABEL(lab)) { READBLENDMODE(X); } else
#define RV_ANYSTR(lab, X)   if(ISLABEL(lab)) { if(!ReadAnyString(&X)) { FAILURE } } else
#define RV_END          { SetError2("Unknown label.", label); retVal = false; goto ded_end_read; }

typedef struct dedsource_s {
    const char*     buffer;
    const char*     pos;
    boolean         atEnd;
    int             lineNumber;
    const char*     fileName;
    int             version; // v6 does not require semicolons.
} dedsource_t;

char dedReadError[512];

static dedsource_t sourceStack[MAX_RECUR_DEPTH];
static dedsource_t* source; // Points to the current source.

static char token[MAX_TOKEN_LEN+1];
static char unreadToken[MAX_TOKEN_LEN+1];

static char* sdup(char const* str)
{
    if(!str) return NULL;

    char* newstr = (char*) M_Malloc(strlen(str) + 1);
    strcpy(newstr, str);
    return newstr;
}

static void SetError(char const* str)
{
    sprintf(dedReadError, "Error in %s:\n  Line %i: %s",
            source ? source->fileName : "?", source ? source->lineNumber : 0,
            str);
}

static void SetError2(char const* str, char const* more)
{
    sprintf(dedReadError, "Error in %s:\n  Line %i: %s (%s)",
            source ? source->fileName : "?", source ? source->lineNumber : 0,
            str, more);
}

/**
 * Reads a single character from the input file. Increments the line
 * number counter if necessary.
 */
static int FGetC(void)
{
    int ch = (unsigned char) *source->pos;

    if(ch)
        source->pos++;
    else
        source->atEnd = true;
    if(ch == '\n')
        source->lineNumber++;
    if(ch == '\r')
        return FGetC();

    return ch;
}

/**
 * Undoes an FGetC.
 */
static int FUngetC(int ch)
{
    if(source->atEnd)
        return 0;
    if(ch == '\n')
        source->lineNumber--;
    if(source->pos > source->buffer)
        source->pos--;

    return ch;
}

/**
 * Reads stuff until a newline is found.
 */
static void SkipComment(void)
{
    int                 ch = FGetC();
    boolean             seq = false;

    if(ch == '\n')
        return; // Comment ends right away.

    if(ch != '>') // Single-line comment?
    {
        while(FGetC() != '\n' && !source->atEnd) {}
    }
    else // Multiline comment?
    {
        while(!source->atEnd)
        {
            ch = FGetC();
            if(seq)
            {
                if(ch == '#')
                    break;
                seq = false;
            }

            if(ch == '<')
                seq = true;
        }
    }
}

static int ReadToken(void)
{
    int                 ch;
    char*               out = token;

    // Has a token been unread?
    if(unreadToken[0])
    {
        strcpy(token, unreadToken);
        strcpy(unreadToken, "");
        return true;
    }

    ch = FGetC();
    if(source->atEnd)
        return false;

    // Skip whitespace and comments in the beginning.
    while((ch == '#' || isspace(ch)))
    {
        if(ch == '#')
            SkipComment();
        ch = FGetC();
        if(source->atEnd)
            return false;
    }

    // Always store the first character.
    *out++ = ch;
    if(STOPCHAR(ch))
    {
        // Stop here.
        *out = 0;
        return true;
    }

    while(!STOPCHAR(ch) && !source->atEnd)
    {
        // Store the character in the buffer.
        ch = FGetC();
        *out++ = ch;
    }
    *(out - 1) = 0; // End token.

    // Put the last read character back in the stream.
    FUngetC(ch);
    return true;
}

static void UnreadToken(const char* token)
{
    // The next time ReadToken() is called, this is returned.
    strcpy(unreadToken, token);
}

/**
 * Current pos in the file is at the first ".
 * Does not expand escape sequences, only checks for \".
 *
 * @return  @c true if successful.
 */
static int ReadString(String &dest, bool inside = false, bool doubleq = false)
{
    if(!inside)
    {
        ReadToken();
        if(!ISTOKEN("\""))
            return false;
    }

    bool esc = false, newl = false;

    // Start reading the characters.
    int ch = FGetC();
    while(esc || ch != '"') // The string-end-character.
    {
        if(source->atEnd)
            return false;

        // If a newline is found, skip all whitespace that follows.
        if(newl)
        {
            if(isspace(ch))
            {
                ch = FGetC();
                continue;
            }
            else
            {
                // End the skip.
                newl = false;
            }
        }

        // An escape character?
        if(!esc && ch == '\\')
        {
            esc = true;
        }
        else
        {
            // In case it's something other than \" or \\, just insert
            // the whole sequence as-is.
            if(esc && ch != '"' && ch != '\\')
                dest += '\\';
            esc = false;
        }
        if(ch == '\n')
            newl = true;

        // Store the character in the buffer.
        if(!esc && !newl)
        {
            dest += char(ch);
            if(doubleq && ch == '"')
                dest += '"';
        }

        // Read the next character, please.
        ch = FGetC();
    }

    return true;
}

static int ReadString(char *dest, int maxLen)
{
    DENG_ASSERT(dest != 0);
    String buffer;
    if(!ReadString(buffer)) return false;
    qstrncpy(dest, buffer.toUtf8().constData(), maxLen);
    return true;
}

/**
 * Read a string of (pretty much) any length.
 */
static int ReadAnyString(char **dest)
{
    String buffer;

    if(!ReadString(buffer))
        return false;

    // Get rid of the old string.
    if(*dest)
        M_Free(*dest);

    // Make a copy.
    QByteArray bufferUtf8 = buffer.toUtf8();
    *dest = (char *) M_Malloc(bufferUtf8.length() + 1);
    qstrcpy(*dest, bufferUtf8.constData());

    return true;
}

static int ReadUri(uri_s **dest_, char const *defaultScheme)
{
    String buffer;

    if(!ReadString(buffer))
        return false;

    // URIs are expected to use forward slashes.
    buffer = Path::normalizeString(buffer);

    if(!*dest_)
        *dest_ = reinterpret_cast<uri_s *>(new de::Uri(buffer, RC_NULL));
    else
        reinterpret_cast<de::Uri *>(*dest_)->setUri(buffer, RC_NULL);

    de::Uri *dest = reinterpret_cast<de::Uri *>(*dest_);

    if(defaultScheme && defaultScheme[0] && dest->scheme().isEmpty())
        dest->setScheme(defaultScheme);

    return true;
}

static int ReadNByteVector(unsigned char* dest, int max)
{
    int                 i;

    FINDBEGIN;
    for(i = 0; i < max; ++i)
    {
        ReadToken();
        if(ISTOKEN("}"))
            return true;
        dest[i] = strtoul(token, 0, 0);
    }
    FINDEND;
    return true;
}

/**
 * @return              @c true, if successful.
 */
static int ReadByte(unsigned char* dest)
{
    ReadToken();
    if(ISTOKEN(";"))
    {
        SetError("Missing integer value.");
        return false;
    }

    *dest = strtoul(token, 0, 0);
    return true;
}

/**
 * @return              @c true, if successful.
 */
static int ReadInt(int* dest, int unsign)
{
    ReadToken();
    if(ISTOKEN(";"))
    {
        SetError("Missing integer value.");
        return false;
    }

    *dest = unsign? (int)strtoul(token, 0, 0) : strtol(token, 0, 0);
    return true;
}

/**
 * @return              @c true, if successful.
 */
static int ReadFloat(float* dest)
{
    ReadToken();
    if(ISTOKEN(";"))
    {
        SetError("Missing float value.");
        return false;
    }

    *dest = (float) strtod(token, 0);
    return true;
}

static int ReadFlags(int *dest, char const *prefix)
{
    // By default, no flags are set.
    *dest = 0;

    ReadToken();
    if(ISTOKEN(";"))
    {
        SetError("Missing flags value.");
        return false;
    }
    if(ISTOKEN("0"))
    {
        // No flags defined.
        return true;
    }

    UnreadToken(token);
    String flag;
    if(ISTOKEN("\""))
    {
        // The old format.
        if(!ReadString(flag))
            return false;

        flag.strip();

        if(!flag.isEmpty())
        {
            *dest = Def_EvalFlags2(flag.toUtf8().constData());
        }
        else
        {
            *dest = 0;
        }
        return true;
    }

    for(;;)
    {
        // Read the flag.
        ReadToken();
        if(prefix)
        {
            flag = String(prefix) + String(token);
        }
        else
        {
            flag = String(token);
        }

        flag.strip();

        if(!flag.isEmpty())
        {
            *dest |= Def_EvalFlags2(flag.toUtf8().constData());
        }

        if(!ReadToken())
            break;

        if(!ISTOKEN("|")) // | is required for multiple flags.
        {
            UnreadToken(token);
            break;
        }
    }

    return true;
}

static int ReadBlendmode(blendmode_t *dest)
{
    LOG_AS("ReadBlendmode");

    String flag;
    blendmode_t bm;

    ReadToken();
    UnreadToken(token);
    if(ISTOKEN("\""))
    {
        // The old format.
        if(!ReadString(flag)) return false;

        bm = blendmode_t(Def_EvalFlags2(flag.toUtf8().constData()));
    }
    else
    {
        // Read the blendmode.
        ReadToken();

        flag = String("bm_") + String(token);

        bm = blendmode_t(Def_EvalFlags2(flag.toUtf8().constData()));
    }

    if(bm != BM_NORMAL)
    {
        *dest = bm;
    }
    else
    {
        LOG_WARNING("Unknown BlendMode '%s' in \"%s\" on line #%i, ignoring (blendmode not changed).")
            << flag << (source ? source->fileName : "?") << (source ? source->lineNumber : 0);
    }

    return true;
}

/**
 * @return              @c true, if successful.
 */
static int ReadLabel(char* label)
{
    strcpy(label, "");
    for(;;)
    {
        ReadToken();
        if(source->atEnd)
        {
            SetError("Unexpected end of file.");
            return false;
        }
        if(ISTOKEN("}")) // End block.
        {
            strcpy(label, token);
            return true;
        }
        if(ISTOKEN(";"))
        {
            if(source->version <= 5)
            {
                SetError("Label without value.");
                return false;
            }
            continue; // Semicolons are optional in v6.
        }
        if(ISTOKEN("=") || ISTOKEN("{"))
            break;

        if(label[0])
            strcat(label, " ");
        strcat(label, token);
    }

    return true;
}

static void DED_Include(const char* fileName, const char* parentDirectory)
{
    ddstring_t tmp;

    Str_Init(&tmp); Str_Set(&tmp, fileName);
    F_FixSlashes(&tmp, &tmp);
    F_ExpandBasePath(&tmp, &tmp);
    if(!F_IsAbsolute(&tmp))
    {
        Str_Prepend(&tmp, parentDirectory);
    }

    Def_ReadProcessDED(Str_Text(&tmp));
    Str_Free(&tmp);

    // Reset state for continuing.
    strncpy(token, "", MAX_TOKEN_LEN);
}

static void DED_InitReader(const char* buffer, const char* fileName)
{
    if(source && source - sourceStack >= MAX_RECUR_DEPTH)
    {
        Con_Error("DED_InitReader: Include recursion is too deep.\n");
    }

    if(!source)
    {
        // This'll be the first source.
        source = sourceStack;
    }
    else
    {
        // Take the next entry in the stack.
        source++;
    }

    source->pos = source->buffer = buffer;
    source->atEnd = false;
    source->lineNumber = 1;
    source->fileName = fileName;
    source->version = DED_VERSION;
}

static void DED_CloseReader(void)
{
    if(source == sourceStack)
    {
        source = NULL;
    }
    else
    {
        memset(source, 0, sizeof(*source));
        source--;
    }
}

/**
 * @param cond          Condition token. Can be a command line option
 *                      or a game mode.
 * @return              @c true if the condition passes.
 */
static boolean DED_CheckCondition(const char* cond, boolean expected)
{
    boolean value = false;

    if(cond[0] == '-')
    {
        // A command line option.
        value = (CommandLine_Check(token) != 0);
    }
    else if(isalnum(cond[0]) && App_GameLoaded())
    {
        // A game mode.
        value = !stricmp(cond, Str_Text(App_CurrentGame().identityKey()));
    }

    return value == expected;
}

/**
 * Reads definitions from the given buffer.
 * The definition is being loaded from @a _sourcefile (DED or WAD).
 *
 * @param buffer        The data to be read, must be null-terminated.
 * @param _sourceFile   Just FYI.
 */
static int DED_ReadData(ded_t* ded, const char* buffer, const char* _sourceFile)
{
    char                dummy[128], label[128], tmp[256];
    int                 dummyInt, idx, retVal = true;
    int                 prevMobjDefIdx = -1; // For "Copy".
    int                 prevStateDefIdx = -1; // For "Copy"
    int                 prevLightDefIdx = -1; // For "Copy".
    int                 prevMaterialDefIdx = -1; // For "Copy".
    int                 prevModelDefIdx = -1; // For "Copy".
    int                 prevMapInfoDefIdx = -1; // For "Copy".
    int                 prevSkyDefIdx = -1; // For "Copy".
    int                 prevDetailDefIdx = -1; // For "Copy".
    int                 prevGenDefIdx = -1; // For "Copy".
    int                 prevDecorDefIdx = -1; // For "Copy".
    int                 prevRefDefIdx = -1; // For "Copy".
    int                 prevLineTypeDefIdx = -1; // For "Copy".
    int                 prevSectorTypeDefIdx = -1; // For "Copy".
    int                 depth;
    char*               rootStr = 0, *ptr;
    int                 bCopyNext = 0;
    ddstring_t sourceFile, sourceFileDir;

    Str_Init(&sourceFile); Str_Set(&sourceFile, _sourceFile);
    F_FixSlashes(&sourceFile, &sourceFile);
    F_ExpandBasePath(&sourceFile, &sourceFile);

    // For including other files -- we must know where we are.
    Str_Init(&sourceFileDir);
    F_FileDir(&sourceFileDir, &sourceFile);

    // Get the next entry from the source stack.
    DED_InitReader(buffer, Str_Text(&sourceFile));

    while(ReadToken())
    {
        if(ISTOKEN("Copy") || ISTOKEN("*"))
        {
            bCopyNext = true;
            continue; // Read the next token.
        }

        if(ISTOKEN(";"))
        {
            // Unnecessary semicolon? Just skip it.
            continue;
        }

        if(ISTOKEN("SkipIf"))
        {
            boolean expected = true;

            ReadToken();
            if(ISTOKEN("Not"))
            {
                expected = false;
                ReadToken();
            }

            if(DED_CheckCondition(token, expected))
            {
                // Ah, we're done. Get out of here.
                goto ded_end_read;
            }
            CHECKSC;
        }

        if(ISTOKEN("Include"))
        {
            // A new include.
            READSTR(tmp);
            CHECKSC;

            DED_Include(tmp, Str_Text(&sourceFileDir));
            strcpy(label, "");
        }

        if(ISTOKEN("IncludeIf")) // An optional include.
        {
            boolean expected = true;

            ReadToken();
            if(ISTOKEN("Not"))
            {
                expected = false;
                ReadToken();
            }

            if(DED_CheckCondition(token, expected))
            {
                READSTR(tmp);
                CHECKSC;

                DED_Include(tmp, Str_Text(&sourceFileDir));
                strcpy(label, "");
            }
            else
            {
                // Arg not found; just skip it.
                READSTR(tmp);
                CHECKSC;
            }
        }

        if(ISTOKEN("ModelPath"))
        {
            READSTR(label);
            CHECKSC;

            de::Uri newSearchPath = de::Uri::fromNativeDirPath(NativePath(label));
            FS1::Scheme& scheme = App_FileSystem().scheme(App_ResourceSystem().resClass("RC_MODEL").defaultScheme());
            scheme.addSearchPath(reinterpret_cast<de::Uri const&>(newSearchPath), FS1::ExtraPaths);
        }

        if(ISTOKEN("Header"))
        {
            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                if(ISLABEL("Version"))
                {
                    READINT(ded->version);
                    source->version = ded->version;
                }
                else RV_STR("Thing prefix", dummy)
                RV_STR("State prefix", dummy)
                RV_STR("Sprite prefix", dummy)
                RV_STR("Sfx prefix", dummy)
                RV_STR("Mus prefix", dummy)
                RV_STR("Text prefix", dummy)
                RV_STR("Model path", dummy)
                RV_FLAGS("Common model flags", ded->modelFlags, "df_")
                RV_FLT("Default model scale", ded->modelScale)
                RV_FLT("Default model offset", ded->modelOffset)
                RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Flag"))
        {
            // A new flag.
            idx = DED_AddFlag(ded, "", "", 0);
            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", ded->flags[idx].id)
                RV_UINT("Value", ded->flags[idx].value)
                RV_STR("Info", ded->flags[idx].text)
                RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Mobj") || ISTOKEN("Thing"))
        {
            boolean bModify = false;
            ded_mobj_t* mo, dummyMo;

            ReadToken();
            if(!ISTOKEN("Mods"))
            {
                // A new mobj type.
                idx = DED_AddMobj(ded, "");
                mo = &ded->mobjs[idx];
            }
            else if(!bCopyNext)
            {
                ded_mobjid_t otherMobjId;

                READSTR(otherMobjId);
                ReadToken();

                idx = Def_GetMobjNum(otherMobjId);
                if(idx < 0)
                {
                    VERBOSE( Con_Message("Warning: Unknown Mobj %s in %s on line #%i, will be ignored.",
                                         otherMobjId, source ? source->fileName : "?", source ? source->lineNumber : 0) )

                    // We'll read into a dummy definition.
                    memset(&dummyMo, 0, sizeof(dummyMo));
                    mo = &dummyMo;
                }
                else
                {
                    mo = &ded->mobjs[idx];
                    bModify = true;
                }
            }
            else
            {
                SetError("Cannot both Copy(Previous) and Modify.");
                retVal = false;
                goto ded_end_read;
            }

            if(prevMobjDefIdx >= 0 && bCopyNext)
            {
                // Should we copy the previous definition?
                memcpy(mo, ded->mobjs + prevMobjDefIdx, sizeof(*mo));
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                // ID cannot be changed when modifying
                if(!bModify && ISLABEL("ID"))
                {
                    READSTR(mo->id);
                }
                else RV_INT("DoomEd number", mo->doomEdNum)
                RV_STR("Name", mo->name)
                RV_STR("Spawn state", mo->states[SN_SPAWN])
                RV_STR("See state", mo->states[SN_SEE])
                RV_STR("Pain state", mo->states[SN_PAIN])
                RV_STR("Melee state", mo->states[SN_MELEE])
                RV_STR("Missile state", mo->states[SN_MISSILE])
                RV_STR("Crash state", mo->states[SN_CRASH])
                RV_STR("Death state", mo->states[SN_DEATH])
                RV_STR("Xdeath state", mo->states[SN_XDEATH])
                RV_STR("Raise state", mo->states[SN_RAISE])
                RV_STR("See sound", mo->seeSound)
                RV_STR("Attack sound", mo->attackSound)
                RV_STR("Pain sound", mo->painSound)
                RV_STR("Death sound", mo->deathSound)
                RV_STR("Active sound", mo->activeSound)
                RV_INT("Reaction time", mo->reactionTime)
                RV_INT("Pain chance", mo->painChance)
                RV_INT("Spawn health", mo->spawnHealth)
                RV_FLT("Speed", mo->speed)
                RV_FLT("Radius", mo->radius)
                RV_FLT("Height", mo->height)
                RV_INT("Mass", mo->mass)
                RV_INT("Damage", mo->damage)
                RV_FLAGS("Flags", mo->flags[0], "mf_")
                RV_FLAGS("Flags2", mo->flags[1], "mf2_")
                RV_FLAGS("Flags3", mo->flags[2], "mf3_")
                RV_INT("Misc1", mo->misc[0])
                RV_INT("Misc2", mo->misc[1])
                RV_INT("Misc3", mo->misc[2])
                RV_INT("Misc4", mo->misc[3])
                RV_END
                CHECKSC;
            }

            // If we did not read into a dummy update the previous index.
            if(idx > 0)
            {
                prevMobjDefIdx = idx;
            }
        }

        if(ISTOKEN("State"))
        {
            boolean bModify = false;
            ded_state_t* st, dummyState;

            ReadToken();
            if(!ISTOKEN("Mods"))
            {
                // A new state.
                idx = DED_AddState(ded, "");
                st = &ded->states[idx];
            }
            else if(!bCopyNext)
            {
                ded_stateid_t otherStateId;

                READSTR(otherStateId);
                ReadToken();

                idx = Def_GetStateNum(otherStateId);
                if(idx < 0)
                {
                    VERBOSE( Con_Message("Warning: Unknown State %s in %s on line #%i, will be ignored.",
                                         otherStateId, source ? source->fileName : "?", source ? source->lineNumber : 0) )

                    // We'll read into a dummy definition.
                    memset(&dummyState, 0, sizeof(dummyState));
                    st = &dummyState;
                }
                else
                {
                    st = &ded->states[idx];
                    bModify = true;
                }
            }
            else
            {
                SetError("Cannot both Copy(Previous) and Modify.");
                retVal = false;
                goto ded_end_read;
            }

            if(prevStateDefIdx >= 0 && bCopyNext)
            {
                // Should we copy the previous definition?
                memcpy(st, ded->states + prevStateDefIdx, sizeof(*st));

                if(st->execute)
                {
                    // Make a copy of the execute command string.
                    size_t len = strlen(st->execute);
                    char* newCmdStr = (char*) M_Malloc(len+1);
                    memcpy(newCmdStr, st->execute, len+1);
                    st->execute = newCmdStr;
                }
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                // ID cannot be changed when modifying
                if(!bModify && ISLABEL("ID"))
                {
                    READSTR(st->id);
                }
                else if(ISLABEL("Frame"))
                {
// Legacy state frame flags:
#define FF_FULLBRIGHT               0x8000
#define FF_FRAMEMASK                0x7fff

                    READINT(st->frame);
                    if(st->frame & FF_FULLBRIGHT)
                    {
                        st->frame &= FF_FRAMEMASK;
                        st->flags |= STF_FULLBRIGHT;
                    }

#undef FF_FRAMEMASK
#undef FF_FULLBRIGHT
                }
                else RV_FLAGS("Flags", st->flags, "statef_")
                RV_STR("Sprite", st->sprite.id)
                RV_INT("Tics", st->tics)
                RV_STR("Action", st->action)
                RV_STR("Next state", st->nextState)
                RV_INT("Misc1", st->misc[0])
                RV_INT("Misc2", st->misc[1])
                RV_INT("Misc3", st->misc[2])
                RV_ANYSTR("Execute", st->execute)
                RV_END
                CHECKSC;
            }

            // If we did not read into a dummy update the previous index.
            if(idx > 0)
            {
                prevStateDefIdx = idx;
            }
        }

        if(ISTOKEN("Sprite"))
        {
            // A new sprite.
            idx = DED_AddSprite(ded, "");
            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", ded->sprites[idx].id)
                RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Light"))
        {
            ded_light_t* lig;

            // A new light.
            idx = DED_AddLight(ded, "");
            lig = &ded->lights[idx];

            // Should we copy the previous definition?
            if(prevLightDefIdx >= 0 && bCopyNext)
            {
                const ded_light_t* prevLight = ded->lights + prevLightDefIdx;

                memcpy(lig, prevLight, sizeof(*lig));
                if(lig->up)     lig->up     = Uri_Dup(lig->up);
                if(lig->down)   lig->down   = Uri_Dup(lig->down);
                if(lig->sides)  lig->sides  = Uri_Dup(lig->sides);
                if(lig->flare)  lig->flare  = Uri_Dup(lig->flare);
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("State", lig->state)
                RV_STR("Map", lig->uniqueMapID)
                RV_FLT("X Offset", lig->offset[VX])
                RV_FLT("Y Offset", lig->offset[VY])
                RV_VEC("Origin", lig->offset, 3)
                RV_FLT("Size", lig->size)
                RV_FLT("Intensity", lig->size)
                RV_FLT("Red", lig->color[0])
                RV_FLT("Green", lig->color[1])
                RV_FLT("Blue", lig->color[2])
                RV_VEC("Color", lig->color, 3)
                if(ISLABEL("Sector levels"))
                {
                    int     b;
                    FINDBEGIN;
                    for(b = 0; b < 2; ++b)
                    {
                        READFLT(lig->lightLevel[b])
                        lig->lightLevel[b] /= 255.0f;
                        if(lig->lightLevel[b] < 0)
                            lig->lightLevel[b] = 0;
                        else if(lig->lightLevel[b] > 1)
                            lig->lightLevel[b] = 1;
                    }
                    ReadToken();
                }
                else
                RV_FLAGS("Flags", lig->flags, "lgf_")
                RV_URI("Top map", &lig->up, "LightMaps")
                RV_URI("Bottom map", &lig->down, "LightMaps")
                RV_URI("Side map", &lig->sides, "LightMaps")
                RV_URI("Flare map", &lig->flare, "LightMaps")
                RV_FLT("Halo radius", lig->haloRadius)
                RV_END
                CHECKSC;
            }
            prevLightDefIdx = idx;
        }

        if(ISTOKEN("Material"))
        {
            bool bModify = false;
            ded_material_t *mat, dummyMat;

            ReadToken();
            if(!ISTOKEN("Mods"))
            {
                // A new material.
                idx = DED_AddMaterial(ded, 0);
                mat = &ded->materials[idx];
            }
            else if(!bCopyNext)
            {
                uri_s *otherMat = 0;
                AutoStr *otherMatPath;

                READURI(&otherMat, NULL);
                ReadToken();

                otherMatPath = Uri_Compose(otherMat);
                mat = Def_GetMaterial(Str_Text(otherMatPath));
                if(!mat)
                {
                    VERBOSE(
                        AutoStr* path = Uri_ToString(otherMat);
                        Con_Message("Warning: Unknown Material %s in %s on line #%i, will be ignored.",
                                    Str_Text(path), source ? source->fileName : "?", source ? source->lineNumber : 0);
                        )

                    // We'll read into a dummy definition.
                    idx = -1;
                    memset(&dummyMat, 0, sizeof(dummyMat));
                    mat = &dummyMat;
                }
                else
                {
                    idx = mat - ded->materials;
                    bModify = true;
                }
                Uri_Delete(otherMat);
            }
            else
            {
                SetError("Cannot both Copy(Previous) and Modify.");
                retVal = false;
                goto ded_end_read;
            }

            // Should we copy the previous definition?
            if(prevMaterialDefIdx >= 0 && bCopyNext)
            {
                ded_material_t const *prevMaterial = ded->materials + prevMaterialDefIdx;
                uri_s *uri = mat->uri;

                std::memcpy(mat, prevMaterial, sizeof(*mat));
                mat->uri = uri;
                if(prevMaterial->uri)
                {
                    if(mat->uri)
                        Uri_Copy(mat->uri, prevMaterial->uri);
                    else
                        mat->uri = Uri_Dup(prevMaterial->uri);
                }

                // Duplicate the layers.
                for(int i = 0; i < DED_MAX_MATERIAL_LAYERS; ++i)
                {
                    ded_material_layer_t const *l = &prevMaterial->layers[i];
                    if(!l->stages) continue;

                    mat->layers[i].stages = (ded_material_layer_stage_t*) M_Malloc(sizeof(*mat->layers[i].stages) * l->stageCount.max);
                    std::memcpy(mat->layers[i].stages, l->stages, sizeof(*mat->layers[i].stages) * l->stageCount.num);

                    for(int k = 0; k < l->stageCount.num; ++k)
                    {
                        if(l->stages[k].texture)
                            mat->layers[i].stages[k].texture = Uri_Dup(l->stages[k].texture);
                    }
                }

                // Duplicate decorations.
                for(int i = 0; i < DED_MAX_MATERIAL_DECORATIONS; ++i)
                {
                    ded_material_decoration_t const *dl = &prevMaterial->decorations[i];
                    if(!dl->stages) continue;

                    mat->decorations[i].stages = (ded_decorlight_stage_t *) M_Malloc(sizeof(*mat->decorations[i].stages) * dl->stageCount.max);
                    std::memcpy(mat->decorations[i].stages, dl->stages, sizeof(*mat->decorations[i].stages) * dl->stageCount.num);

                    for(int k = 0; k < dl->stageCount.num; ++k)
                    {
                        ded_decorlight_stage_t *stage = &mat->decorations[i].stages[k];
                        if(stage->flare)   stage->flare = Uri_Dup(stage->flare);
                        if(stage->up)      stage->up    = Uri_Dup(stage->up);
                        if(stage->down)    stage->down  = Uri_Dup(stage->down);
                        if(stage->sides)   stage->sides = Uri_Dup(stage->sides);
                    }
                }
            }

            uint layer = 0;
            uint light = 0;

            FINDBEGIN;
            forever
            {
                READLABEL;
                // ID cannot be changed when modifying
                if(!bModify && ISLABEL("ID"))
                {
                    READURI(&mat->uri, NULL);
                }
                else RV_FLAGS("Flags", mat->flags, "matf_")
                RV_INT("Width", mat->width)
                RV_INT("Height", mat->height)
                if(ISLABEL("Layer"))
                {
                    int layerStage = 0;

                    if(layer >= DED_MAX_MATERIAL_LAYERS)
                    {
                        SetError("Too many Material layers.");
                        retVal = false;
                        goto ded_end_read;
                    }

                    FINDBEGIN;
                    forever
                    {
                        READLABEL;
                        if(ISLABEL("Stage"))
                        {
                            // Need to allocate a new stage?
                            if(layerStage >= mat->layers[layer].stageCount.num)
                            {
                                DED_AddMaterialLayerStage(&mat->layers[layer]);

                                if(mat->autoGenerated && layerStage > 0)
                                {
                                    // When adding a new stage to an autogenerated material
                                    // initialize by copying values from the previous stage.
                                    ded_material_layer_stage_t const
                                        &prevSt = mat->layers[layer].stages[layerStage - 1];
                                    ded_material_layer_stage_t
                                        &st     = mat->layers[layer].stages[layerStage];

                                    if(prevSt.texture)
                                        st.texture = Uri_Dup(prevSt.texture);
                                    st.tics                 = prevSt.tics;
                                    st.variance             = prevSt.variance;
                                    st.glowStrength         = prevSt.glowStrength;
                                    st.glowStrengthVariance = prevSt.glowStrengthVariance;
                                    V2f_Copy(st.texOrigin,    prevSt.texOrigin);
                                }
                            }

                            ded_material_layer_stage_t *st = &mat->layers[layer].stages[layerStage];

                            FINDBEGIN;
                            forever
                            {
                                READLABEL;
                                RV_URI("Texture", &st->texture, 0) // Default to "any" scheme.
                                RV_INT("Tics", st->tics)
                                RV_FLT("Rnd", st->variance)
                                RV_VEC("Offset", st->texOrigin, 2)
                                RV_FLT("Glow Rnd", st->glowStrengthVariance)
                                RV_FLT("Glow", st->glowStrength)
                                RV_END
                                CHECKSC;
                            }
                            layerStage++;
                        }
                        else RV_END
                        CHECKSC;
                    }
                    layer++;
                }
                else if(ISLABEL("Light"))
                {
                    int lightStage = 0;

                    if(light == DED_MAX_MATERIAL_DECORATIONS)
                    {
                        SetError("Too many lights in material.");
                        retVal = false;
                        goto ded_end_read;
                    }

                    ded_material_decoration_t *dl = &mat->decorations[light];
                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_IVEC("Pattern offset", dl->patternOffset, 2)
                        RV_IVEC("Pattern skip", dl->patternSkip, 2)
                        if(ISLABEL("Stage"))
                        {
                            // Need to allocate a new stage?
                            if(lightStage >= dl->stageCount.num)
                            {
                                lightStage = DED_AddMaterialDecorationStage(dl);
                            }

                            ded_decorlight_stage_t *st = &dl->stages[lightStage];
                            FINDBEGIN;
                            for(;;)
                            {
                                READLABEL;
                                RV_INT("Tics", st->tics)
                                RV_FLT("Rnd", st->variance)
                                RV_VEC("Offset", st->pos, 2)
                                RV_FLT("Distance", st->elevation)
                                RV_VEC("Color", st->color, 3)
                                RV_FLT("Radius", st->radius)
                                RV_FLT("Halo radius", st->haloRadius)
                                if(ISLABEL("Levels"))
                                {
                                    FINDBEGIN;
                                    for(int b = 0; b < 2; ++b)
                                    {
                                        READFLT(st->lightLevels[b])
                                        st->lightLevels[b] /= 255.0f;
                                        if(st->lightLevels[b] < 0)
                                            st->lightLevels[b] = 0;
                                        else if(st->lightLevels[b] > 1)
                                            st->lightLevels[b] = 1;
                                    }
                                    ReadToken();
                                }
                                else
                                RV_INT("Flare texture", st->sysFlareIdx)
                                RV_URI("Flare map", &st->flare, "LightMaps")
                                RV_URI("Top map", &st->up, "LightMaps")
                                RV_URI("Bottom map", &st->down, "LightMaps")
                                RV_URI("Side map", &st->sides, "LightMaps")
                                RV_END
                                CHECKSC;
                            }
                            lightStage++;
                        }
                        else RV_END
                        CHECKSC;
                    }
                    light++;
                }
                else RV_END
                CHECKSC;
            }

            // If we did not read into a dummy update the previous index.
            if(idx > 0)
            {
                prevMaterialDefIdx = idx;
            }
            else
            {
                /// @todo fixme: Free memory allocated for the dummy.
            }
        }

        if(ISTOKEN("Model"))
        {
            ded_model_t* mdl, *prevModel = NULL;
            uint sub = 0;

            // A new model.
            idx = DED_AddModel(ded, "");
            mdl = &ded->models[idx];

            if(prevModelDefIdx >= 0)
            {
                prevModel = &ded->models[prevModelDefIdx];
                // Should we copy the previous definition?
                if(bCopyNext)
                {
                    *mdl = *prevModel;
                    for(uint i = 0; i < mdl->subCount(); ++i)
                    {
                        if(mdl->sub(i).filename)
                            mdl->sub(i).filename = Uri_Dup(mdl->sub(i).filename);

                        if(mdl->sub(i).skinFilename)
                            mdl->sub(i).skinFilename = Uri_Dup(mdl->sub(i).skinFilename);

                        if(mdl->sub(i).shinySkin)
                            mdl->sub(i).shinySkin = Uri_Dup(mdl->sub(i).shinySkin);
                    }
                }
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", mdl->id)
                RV_STR("State", mdl->state)
                RV_INT("Off", mdl->off)
                RV_STR("Sprite", mdl->sprite.id)
                RV_INT("Sprite frame", mdl->spriteFrame)
                RV_FLAGS("Group", mdl->group, "mg_")
                RV_INT("Selector", mdl->selector)
                RV_FLAGS("Flags", mdl->flags, "df_")
                RV_FLT("Inter", mdl->interMark)
                RV_INT("Skin tics", mdl->skinTics)
                RV_FLT("Resize", mdl->resize)
                if(ISLABEL("Scale"))
                {
                    READFLT(mdl->scale[1]);
                    mdl->scale[0] = mdl->scale[2] = mdl->scale[1];
                }
                else RV_VEC("Scale XYZ", mdl->scale, 3)
                RV_FLT("Offset", mdl->offset[1])
                RV_VEC("Offset XYZ", mdl->offset, 3)
                RV_VEC("Interpolate", mdl->interRange, 2)
                RV_FLT("Shadow radius", mdl->shadowRadius)
                if(ISLABEL("Md2") || ISLABEL("Sub"))
                {
                    // Add another submodel.
                    if(sub >= mdl->subCount())
                    {
                        mdl->appendSub();
                    }
                    DENG_ASSERT(sub < mdl->subCount());

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_URI("File", &mdl->sub(sub).filename, "Models")
                        RV_STR("Frame", mdl->sub(sub).frame)
                        RV_INT("Frame range", mdl->sub(sub).frameRange)
                        RV_BLENDMODE("Blending mode", mdl->sub(sub).blendMode)
                        RV_INT("Skin", mdl->sub(sub).skin)
                        RV_URI("Skin file", &mdl->sub(sub).skinFilename, "Models")
                        RV_INT("Skin range", mdl->sub(sub).skinRange)
                        RV_VEC("Offset XYZ", mdl->sub(sub).offset, 3)
                        RV_FLAGS("Flags", mdl->sub(sub).flags, "df_")
                        RV_FLT("Transparent", mdl->sub(sub).alpha)
                        RV_FLT("Parm", mdl->sub(sub).parm)
                        RV_BYTE("Selskin mask", mdl->sub(sub).selSkinBits[0])
                        RV_BYTE("Selskin shift", mdl->sub(sub).selSkinBits[1])
                        RV_NBVEC("Selskins", mdl->sub(sub).selSkins, 8)
                        RV_URI("Shiny skin", &mdl->sub(sub).shinySkin, "Models")
                        RV_FLT("Shiny", mdl->sub(sub).shiny)
                        RV_VEC("Shiny color", mdl->sub(sub).shinyColor, 3)
                        RV_FLT("Shiny reaction", mdl->sub(sub).shinyReact)
                        RV_END
                        CHECKSC;
                    }
                    sub++;
                }
                else RV_END
                CHECKSC;
            }

            // Some post-processing. No point in doing this in a fancy way,
            // the whole reader will be rewritten sooner or later...
            if(prevModel)
            {
                if(!strcmp(mdl->state, "-"))
                    strcpy(mdl->state, prevModel->state);
                if(!strcmp(mdl->sprite.id, "-"))
                    strcpy(mdl->sprite.id, prevModel->sprite.id);
                //if(!strcmp(mdl->group, "-"))      strcpy(mdl->group,      prevModel->group);
                //if(!strcmp(mdl->flags, "-"))      strcpy(mdl->flags,      prevModel->flags);

                for(uint i = 0; i < mdl->subCount(); ++i)
                {
                    if(mdl->sub(i).filename && !Str_CompareIgnoreCase(Uri_Path(mdl->sub(i).filename), "-"))
                    {
                        Uri_Delete(mdl->sub(i).filename);
                        mdl->sub(i).filename = NULL;
                    }

                    if(mdl->sub(i).skinFilename && !Str_CompareIgnoreCase(Uri_Path(mdl->sub(i).skinFilename), "-"))
                    {
                        Uri_Delete(mdl->sub(i).skinFilename);
                        mdl->sub(i).skinFilename = NULL;
                    }

                    if(mdl->sub(i).shinySkin && !Str_CompareIgnoreCase(Uri_Path(mdl->sub(i).shinySkin), "-"))
                    {
                        Uri_Delete(mdl->sub(i).shinySkin);
                        mdl->sub(i).shinySkin = NULL;
                    }

                    if(!strcmp(mdl->sub(i).frame, "-"))
                        memset(mdl->sub(i).frame, 0, sizeof(ded_string_t));
                }
            }

            prevModelDefIdx = idx;
        }

        if(ISTOKEN("Sound"))
        {   // A new sound.
            ded_sound_t*        snd;

            idx = DED_AddSound(ded, "");
            snd = &ded->sounds[idx];

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", snd->id)
                RV_STR("Lump", snd->lumpName)
                RV_STR("Name", snd->name)
                RV_STR("Link", snd->link)
                RV_INT("Link pitch", snd->linkPitch)
                RV_INT("Link volume", snd->linkVolume)
                RV_INT("Priority", snd->priority)
                RV_INT("Max channels", snd->channels)
                RV_INT("Group", snd->group)
                RV_FLAGS("Flags", snd->flags, "sf_")
                RV_URI("Ext", &snd->ext, "Sfx")
                RV_URI("File", &snd->ext, "Sfx")
                RV_URI("File name", &snd->ext, "Sfx")
                RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Music"))
        {   // A new music.
            ded_music_t*        mus;

            idx = DED_AddMusic(ded, "");
            mus = &ded->music[idx];

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", mus->id)
                RV_STR("Lump", mus->lumpName)
                RV_URI("File name", &mus->path, "Music")
                RV_URI("File", &mus->path, "Music")
                RV_URI("Ext", &mus->path, "Music") // Both work.
                RV_INT("CD track", mus->cdTrack)
                RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Sky"))
        {   // A new sky definition.
            ded_sky_t* sky;
            uint sub = 0;

            idx = DED_AddSky(ded, "");
            sky = &ded->skies[idx];

            // Should we copy the previous definition?
            if(prevSkyDefIdx >= 0 && bCopyNext)
            {
                ded_sky_t* prevSky = ded->skies + prevSkyDefIdx;
                int i;

                memcpy(sky, prevSky, sizeof(*sky));
                for(i = 0; i < NUM_SKY_LAYERS; ++i)
                {
                    if(sky->layers[i].material)
                        sky->layers[i].material = Uri_Dup(sky->layers[i].material);
                }
                for(i = 0; i < NUM_SKY_MODELS; ++i)
                {
                    sky->models[i].execute = sdup(sky->models[i].execute);
                }
            }
            prevSkyDefIdx = idx;
            sub = 0;

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", sky->id)
                RV_FLAGS("Flags", sky->flags, "sif_")
                RV_FLT("Height", sky->height)
                RV_FLT("Horizon offset", sky->horizonOffset)
                RV_VEC("Light color", sky->color, 3)
                if(ISLABEL("Layer 1") || ISLABEL("Layer 2"))
                {
                    ded_skylayer_t *sl = sky->layers + atoi(label+6) - 1;
                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_URI("Material", &sl->material, 0)
                        RV_URI("Texture", &sl->material, "Textures" )
                        RV_FLAGS("Flags", sl->flags, "slf_")
                        RV_FLT("Offset", sl->offset)
                        RV_FLT("Color limit", sl->colorLimit)
                        RV_END
                        CHECKSC;
                    }
                }
                else if(ISLABEL("Model"))
                {
                    ded_skymodel_t *sm = &sky->models[sub];
                    if(sub == NUM_SKY_MODELS)
                    {   // Too many!
                        SetError("Too many Sky models.");
                        retVal = false;
                        goto ded_end_read;
                    }
                    sub++;

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_STR("ID", sm->id)
                        RV_INT("Layer", sm->layer)
                        RV_FLT("Frame interval", sm->frameInterval)
                        RV_FLT("Yaw", sm->yaw)
                        RV_FLT("Yaw speed", sm->yawSpeed)
                        RV_VEC("Rotate", sm->rotate, 2)
                        RV_VEC("Offset factor", sm->coordFactor, 3)
                        RV_VEC("Color", sm->color, 4)
                        RV_ANYSTR("Execute", sm->execute)
                        RV_END
                        CHECKSC;
                    }
                }
                else RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Map")) // Info
        {   // A new map info.
            uint sub;
            ded_mapinfo_t* mi;

            idx = DED_AddMapInfo(ded, NULL);
            mi = &ded->mapInfo[idx];

            // Should we copy the previous definition?
            if(prevMapInfoDefIdx >= 0 && bCopyNext)
            {
                const ded_mapinfo_t* prevMapInfo = ded->mapInfo + prevMapInfoDefIdx;
                uri_s* uri = mi->uri;
                int i;

                memcpy(mi, prevMapInfo, sizeof(*mi));
                mi->uri = uri;
                if(prevMapInfo->uri)
                {
                    if(mi->uri)
                        Uri_Copy(mi->uri, prevMapInfo->uri);
                    else
                        mi->uri = Uri_Dup(prevMapInfo->uri);
                }

                mi->execute = sdup(mi->execute);
                for(i = 0; i < NUM_SKY_LAYERS; ++i)
                {
                    if(mi->sky.layers[i].material)
                        mi->sky.layers[i].material = Uri_Dup(mi->sky.layers[i].material);
                }
                for(i = 0; i < NUM_SKY_MODELS; ++i)
                {
                    mi->sky.models[i].execute = sdup(mi->sky.models[i].execute);
                }
            }
            prevMapInfoDefIdx = idx;
            sub = 0;

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_URI("ID", &mi->uri, NULL)
                RV_STR("Name", mi->name)
                RV_STR("Author", mi->author)
                RV_FLAGS("Flags", mi->flags, "mif_")
                RV_STR("Music", mi->music)
                RV_FLT("Par time", mi->parTime)
                RV_FLT("Fog color R", mi->fogColor[0])
                RV_FLT("Fog color G", mi->fogColor[1])
                RV_FLT("Fog color B", mi->fogColor[2])
                RV_FLT("Fog start", mi->fogStart)
                RV_FLT("Fog end", mi->fogEnd)
                RV_FLT("Fog density", mi->fogDensity)
                RV_FLT("Ambient light", mi->ambient)
                RV_FLT("Gravity", mi->gravity)
                RV_ANYSTR("Execute", mi->execute)
                RV_STR("Sky", mi->skyID)
                RV_FLT("Sky height", mi->sky.height)
                RV_FLT("Horizon offset", mi->sky.horizonOffset)
                RV_VEC("Sky light color", mi->sky.color, 3)
                if(ISLABEL("Sky Layer 1") || ISLABEL("Sky Layer 2"))
                {
                    ded_skylayer_t *sl = mi->sky.layers + atoi(label+10) - 1;
                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_URI("Material", &sl->material, 0)
                        RV_URI("Texture", &sl->material, "Textures")
                        RV_FLAGS("Flags", sl->flags, "slf_")
                        RV_FLT("Offset", sl->offset)
                        RV_FLT("Color limit", sl->colorLimit)
                        RV_END
                        CHECKSC;
                    }
                }
                else if(ISLABEL("Sky Model"))
                {
                    ded_skymodel_t *sm = &mi->sky.models[sub];
                    if(sub == NUM_SKY_MODELS)
                    {   // Too many!
                        SetError("Too many Sky models.");
                        retVal = false;
                        goto ded_end_read;
                    }
                    sub++;

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_STR("ID", sm->id)
                        RV_INT("Layer", sm->layer)
                        RV_FLT("Frame interval", sm->frameInterval)
                        RV_FLT("Yaw", sm->yaw)
                        RV_FLT("Yaw speed", sm->yawSpeed)
                        RV_VEC("Rotate", sm->rotate, 2)
                        RV_VEC("Offset factor", sm->coordFactor, 3)
                        RV_VEC("Color", sm->color, 4)
                        RV_ANYSTR("Execute", sm->execute)
                        RV_END
                        CHECKSC;
                    }
                }
                else RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Text"))
        {
            // A new text.
            idx = DED_AddText(ded, "");
            ded_text_t *txt = &ded->text[idx];

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", txt->id)
                if(ISLABEL("Text"))
                {
                    String buffer;
                    if(ReadString(buffer))
                    {
                        QByteArray bufferUtf8 = buffer.toUtf8();
                        txt->text = (char *) M_Realloc(txt->text, bufferUtf8.length() + 1);
                        qstrcpy(txt->text, bufferUtf8.constData());
                    }
                    else
                    {
                        SetError("Syntax error in Text value.");
                        retVal = false;
                        goto ded_end_read;
                    }
                }
                else RV_END
                CHECKSC;
            }
        }

        if(ISTOKEN("Texture"))
        {
            ReadToken();
            if(ISTOKEN("Environment"))
            {   // A new environment.
                ded_tenviron_t*     tenv;

                idx = DED_AddTextureEnv(ded, "");
                tenv = &ded->textureEnv[idx];

                FINDBEGIN;
                for(;;)
                {
                    uri_s** mn;

                    READLABEL;
                    RV_STR("ID", tenv->id)
                    if(ISLABEL("Material") || ISLABEL("Texture") || ISLABEL("Flat"))
                    {
                        // A new material path.
                        ddstring_t schemeName; Str_Init(&schemeName);
                        Str_Set(&schemeName, ISLABEL("Material")? "" : ISLABEL("Texture")? "Textures" : "Flats");
                        mn = (uri_s**) DED_NewEntry((void**)&tenv->materials, &tenv->count, sizeof(*mn));
                        FINDBEGIN;
                        for(;;)
                        {
                            READLABEL;
                            RV_URI("ID", mn, Str_Text(&schemeName))
                            RV_END
                            CHECKSC;
                        }
                        Str_Free(&schemeName);
                    }
                    else RV_END
                    CHECKSC;
                }
            }
        }

        if(ISTOKEN("Composite"))
        {
            ReadToken();
            if(ISTOKEN("BitmapFont"))
            {
                ded_compositefont_t* cfont;

                idx = DED_AddCompositeFont(ded, NULL);
                cfont = &ded->compositeFonts[idx];

                FINDBEGIN;
                for(;;)
                {
                    READLABEL;
                    if(ISLABEL("ID"))
                    {
                        READURI(&cfont->uri, "Game")
                        CHECKSC;
                    }
                    else if(M_IsStringValidInt(label))
                    {
                        ded_compositefont_mappedcharacter_t* mc = 0;
                        int ascii = atoi(label);
                        if(ascii < 0 || ascii > 255)
                        {
                            SetError("Invalid ascii code.");
                            retVal = false;
                            goto ded_end_read;
                        }

                        { int i;
                        for(i = 0; i < cfont->charMapCount.num; ++i)
                            if(cfont->charMap[i].ch == (unsigned char) ascii)
                                mc = &cfont->charMap[i];
                        }

                        if(mc == 0)
                        {
                            mc = (ded_compositefont_mappedcharacter_t*) DED_NewEntry((void**)&cfont->charMap, &cfont->charMapCount, sizeof(*mc));
                            mc->ch = ascii;
                        }

                        FINDBEGIN;
                        for(;;)
                        {
                            READLABEL;
                            RV_URI("Texture", &mc->path, "Patches")
                            RV_END
                            CHECKSC;
                        }
                    }
                    else
                    RV_END
                }
            }
        }

        if(ISTOKEN("Values")) // String Values
        {
            depth = 0;
            rootStr = (char*) M_Calloc(1); // A null string.

            FINDBEGIN;
            for(;;)
            {
                // Get the next label but don't stop on }.
                READLABEL_NOBREAK;
                if(strchr(label, '|'))
                {
                    SetError("Value labels can not include '|' characters (ASCII 124).");
                    retVal = false;
                    goto ded_end_read;
                }

                if(ISTOKEN("="))
                {
                    // Define a new string.
                    String buffer;

                    if(ReadString(buffer))
                    {
                        // Get a new value entry.
                        idx = DED_AddValue(ded, 0);
                        ded_value_t *val = &ded->values[idx];

                        QByteArray bufferUtf8 = buffer.toUtf8();
                        val->text = (char *) M_Malloc(bufferUtf8.length() + 1);
                        qstrcpy(val->text, bufferUtf8.constData());

                        // Compose the identifier.
                        val->id = (char *) M_Malloc(strlen(rootStr) + strlen(label) + 1);
                        strcpy(val->id, rootStr);
                        strcat(val->id, label);
                    }
                    else
                    {
                        SetError("Syntax error in Value string.");
                        retVal = false;
                        goto ded_end_read;
                    }
                }
                else if(ISTOKEN("{"))
                {
                    // Begin a new group.
                    rootStr = (char*) M_Realloc(rootStr, strlen(rootStr) + strlen(label) + 2);
                    strcat(rootStr, label);
                    strcat(rootStr, "|");   // The separator.
                    // Increase group level.
                    depth++;
                    continue;
                }
                else if(ISTOKEN("}"))
                {
                    size_t len;

                    // End group.
                    if(!depth)
                        break;   // End root depth.

                    // Decrease level and modify rootStr.
                    depth--;
                    len = strlen(rootStr);
                    rootStr[len-1] = 0; // Remove last |.
                    ptr = strrchr(rootStr, '|');
                    if(ptr)
                    {
                        ptr[1] = 0;
                        rootStr = (char*) M_Realloc(rootStr, strlen(rootStr) + 1);
                    }
                    else
                    {
                        // Back to level zero.
                        rootStr = (char*) M_Realloc(rootStr, 1);
                        *rootStr = 0;
                    }
                }
                else
                {
                    // Only the above characters are allowed.
                    SetError("Illegal token.");
                    retVal = false;
                    goto ded_end_read;
                }
                CHECKSC;
            }
            M_Free(rootStr);
            rootStr = 0;
        }

        if(ISTOKEN("Detail")) // Detail Texture
        {
            idx = DED_AddDetail(ded, "");
            ded_detailtexture_t *dtl = &ded->details[idx];

             // Should we copy the previous definition?
            if(prevDetailDefIdx >= 0 && bCopyNext)
            {
                ded_detailtexture_t const *prevDetail = ded->details + prevDetailDefIdx;

                std::memcpy(dtl, prevDetail, sizeof(*dtl));

                if(dtl->material1) dtl->material1  = Uri_Dup(dtl->material1);
                if(dtl->material2) dtl->material2  = Uri_Dup(dtl->material2);
                if(dtl->stage.texture) dtl->stage.texture = Uri_Dup(dtl->stage.texture);
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_FLAGS("Flags", dtl->flags, "dtf_")
                if(ISLABEL("Texture"))
                {
                    READURI(&dtl->material1, "Textures")
                }
                else if(ISLABEL("Wall")) // Alias
                {
                    READURI(&dtl->material1, "Textures")
                }
                else if(ISLABEL("Flat"))
                {
                    READURI(&dtl->material2, "Flats")
                }
                else if(ISLABEL("Lump"))
                {
                    READURI(&dtl->stage.texture, "Lumps")
                }
                else if(ISLABEL("File"))
                {
                    READURI(&dtl->stage.texture, 0)
                }
                else
                RV_FLT("Scale", dtl->stage.scale)
                RV_FLT("Strength", dtl->stage.strength)
                RV_FLT("Distance", dtl->stage.maxDistance)
                RV_END
                CHECKSC;
            }
            prevDetailDefIdx = idx;
        }

        if(ISTOKEN("Reflection")) // Surface reflection
        {
            ded_reflection_t* ref = 0;

            idx = DED_AddReflection(ded);
            ref = &ded->reflections[idx];

            // Should we copy the previous definition?
            if(prevRefDefIdx >= 0 && bCopyNext)
            {
                const ded_reflection_t* prevRef = ded->reflections + prevRefDefIdx;

                memcpy(ref, prevRef, sizeof(*ref));

                if(ref->material) ref->material = Uri_Dup(ref->material);
                if(ref->stage.texture) ref->stage.texture = Uri_Dup(ref->stage.texture);
                if(ref->stage.maskTexture) ref->stage.maskTexture = Uri_Dup(ref->stage.maskTexture);
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_FLAGS("Flags", ref->flags, "rff_")
                RV_FLT("Shininess", ref->stage.shininess)
                RV_VEC("Min color", ref->stage.minColor, 3)
                RV_BLENDMODE("Blending mode", ref->stage.blendMode)
                RV_URI("Shiny map", &ref->stage.texture, "LightMaps")
                RV_URI("Mask map", &ref->stage.maskTexture, "LightMaps")
                RV_FLT("Mask width", ref->stage.maskWidth)
                RV_FLT("Mask height", ref->stage.maskHeight)
                if(ISLABEL("Material"))
                {
                    READURI(&ref->material, 0)
                }
                else if(ISLABEL("Texture"))
                {
                    READURI(&ref->material, "Textures")
                }
                else if(ISLABEL("Flat"))
                {
                    READURI(&ref->material, "Flats")
                }
                else RV_END
                CHECKSC;
            }
            prevRefDefIdx = idx;
        }

        if(ISTOKEN("Generator")) // Particle Generator
        {
            ded_ptcgen_t* gen;
            int sub = 0;

            idx = DED_AddPtcGen(ded, "");
            gen = &ded->ptcGens[idx];

            // Should we copy the previous definition?
            if(prevGenDefIdx >= 0 && bCopyNext)
            {
                const ded_ptcgen_t* prevGen = ded->ptcGens + prevGenDefIdx;

                memcpy(gen, prevGen, sizeof(*gen));

                if(gen->map) gen->map = Uri_Dup(gen->map);
                if(gen->material) gen->material = Uri_Dup(gen->material);

                // Duplicate the stages array.
                if(gen->stages)
                {
                    gen->stages = (ded_ptcstage_t*) M_Malloc(sizeof(ded_ptcstage_t) * gen->stageCount.max);
                    memcpy(gen->stages, prevGen->stages, sizeof(ded_ptcstage_t) * gen->stageCount.num);
                }
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("State", gen->state)
                if(ISLABEL("Material"))
                {
                    READURI(&gen->material, 0)
                }
                else if(ISLABEL("Flat"))
                {
                    READURI(&gen->material, "Flats")
                }
                else if(ISLABEL("Texture"))
                {
                    READURI(&gen->material, "Textures")
                }
                else
                RV_STR("Mobj", gen->type)
                RV_STR("Alt mobj", gen->type2)
                RV_STR("Damage mobj", gen->damage)
                RV_URI("Map", &gen->map, NULL)
                RV_FLAGS("Flags", gen->flags, "gnf_")
                RV_FLT("Speed", gen->speed)
                RV_FLT("Speed Rnd", gen->speedVariance)
                RV_VEC("Vector", gen->vector, 3)
                RV_FLT("Vector Rnd", gen->vectorVariance)
                RV_FLT("Init vector Rnd", gen->initVectorVariance)
                RV_VEC("Center", gen->center, 3)
                RV_INT("Submodel", gen->subModel)
                RV_FLT("Spawn radius", gen->spawnRadius)
                RV_FLT("Min spawn radius", gen->spawnRadiusMin)
                RV_FLT("Distance", gen->maxDist)
                RV_INT("Spawn age", gen->spawnAge)
                RV_INT("Max age", gen->maxAge)
                RV_INT("Particles", gen->particles)
                RV_FLT("Spawn rate", gen->spawnRate)
                RV_FLT("Spawn Rnd", gen->spawnRateVariance)
                RV_INT("Presim", gen->preSim)
                RV_INT("Alt start", gen->altStart)
                RV_FLT("Alt Rnd", gen->altStartVariance)
                RV_VEC("Force axis", gen->forceAxis, 3)
                RV_FLT("Force radius", gen->forceRadius)
                RV_FLT("Force", gen->force)
                RV_VEC("Force origin", gen->forceOrigin, 3)
                if(ISLABEL("Stage"))
                {
                    ded_ptcstage_t *st = NULL;

                    if(sub >= gen->stageCount.num)
                    {
                        // Allocate new stage.
                        sub = DED_AddPtcGenStage(gen);
                    }

                    st = &gen->stages[sub];

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_FLAGS("Type", st->type, "pt_")
                        RV_INT("Tics", st->tics)
                        RV_FLT("Rnd", st->variance)
                        RV_VEC("Color", st->color, 4)
                        RV_FLT("Radius", st->radius)
                        RV_FLT("Radius rnd", st->radiusVariance)
                        RV_FLAGS("Flags", st->flags, "ptf_")
                        RV_FLT("Bounce", st->bounce)
                        RV_FLT("Gravity", st->gravity)
                        RV_FLT("Resistance", st->resistance)
                        RV_STR("Frame", st->frameName)
                        RV_STR("End frame", st->endFrameName)
                        RV_VEC("Spin", st->spin, 2)
                        RV_VEC("Spin resistance", st->spinResistance, 2)
                        RV_STR("Sound", st->sound.name)
                        RV_FLT("Volume", st->sound.volume)
                        RV_STR("Hit sound", st->hitSound.name)
                        RV_FLT("Hit volume", st->hitSound.volume)
                        RV_VEC("Force", st->vectorForce, 3)
                        RV_END
                        CHECKSC;
                    }
                    sub++;
                }
                else RV_END
                CHECKSC;
            }
            prevGenDefIdx = idx;
        }

        if(ISTOKEN("Finale") || ISTOKEN("InFine"))
        {
            idx = DED_AddFinale(ded);
            ded_finale_t *fin = &ded->finales[idx];

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", fin->id)
                RV_URI("Before", &fin->before, NULL)
                RV_URI("After", &fin->after, NULL)
                RV_INT("Game", dummyInt)
                if(ISLABEL("Script"))
                {
                    String buffer; buffer.reserve(1600);

                    FINDBEGIN;
                    ReadToken();
                    while(!ISTOKEN("}") && !source->atEnd)
                    {
                        if(!buffer.isEmpty())
                            buffer += ' ';

                        buffer += String(token);
                        if(ISTOKEN("\""))
                        {
                            ReadString(buffer, true, true);
                            buffer += '"';
                        }
                        ReadToken();
                    }
                    QByteArray bufferUtf8 = buffer.toUtf8();
                    fin->script = (char *) M_Realloc(fin->script, bufferUtf8.length() + 1);
                    qstrcpy(fin->script, bufferUtf8.constData());
                }
                else RV_END
                CHECKSC;
            }
        }

        // An oldschool (light) decoration definition?
        if(ISTOKEN("Decoration"))
        {
            idx = DED_AddDecoration(ded);
            ded_decor_t *decor = &ded->decorations[idx];

            // Should we copy the previous definition?
            if(prevDecorDefIdx >= 0 && bCopyNext)
            {
                ded_decor_t const *prevDecor = ded->decorations + prevDecorDefIdx;

                std::memcpy(decor, prevDecor, sizeof(*decor));
                if(decor->material) decor->material = Uri_Dup(decor->material);

                for(int i = 0; i < DED_DECOR_NUM_LIGHTS; ++i)
                {
                    ded_decoration_t *dl = &decor->lights[i];
                    if(dl->stage.flare)   dl->stage.flare = Uri_Dup(dl->stage.flare);
                    if(dl->stage.up)      dl->stage.up    = Uri_Dup(dl->stage.up);
                    if(dl->stage.down)    dl->stage.down  = Uri_Dup(dl->stage.down);
                    if(dl->stage.sides)   dl->stage.sides = Uri_Dup(dl->stage.sides);
                }
            }

            uint sub = 0;
            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_FLAGS("Flags", decor->flags, "dcf_")
                if(ISLABEL("Material"))
                {
                    READURI(&decor->material, 0)
                }
                else if(ISLABEL("Texture"))
                {
                    READURI(&decor->material, "Textures")
                }
                else if(ISLABEL("Flat"))
                {
                    READURI(&decor->material, "Flats")
                }
                else if(ISLABEL("Light"))
                {
                    if(sub == DED_DECOR_NUM_LIGHTS)
                    {
                        SetError("Too many lights in decoration.");
                        retVal = false;
                        goto ded_end_read;
                    }

                    ded_decoration_t *dl = &decor->lights[sub];
                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_VEC("Offset",        dl->stage.pos, 2)
                        RV_FLT("Distance",      dl->stage.elevation)
                        RV_VEC("Color",         dl->stage.color, 3)
                        RV_FLT("Radius",        dl->stage.radius)
                        RV_FLT("Halo radius",   dl->stage.haloRadius)
                        RV_IVEC("Pattern offset", dl->patternOffset, 2)
                        RV_IVEC("Pattern skip", dl->patternSkip, 2)
                        if(ISLABEL("Levels"))
                        {
                            FINDBEGIN;
                            for(int b = 0; b < 2; ++b)
                            {
                                READFLT(dl->stage.lightLevels[b])
                                dl->stage.lightLevels[b] /= 255.0f;
                                if(dl->stage.lightLevels[b] < 0)
                                    dl->stage.lightLevels[b] = 0;
                                else if(dl->stage.lightLevels[b] > 1)
                                    dl->stage.lightLevels[b] = 1;
                            }
                            ReadToken();
                        }
                        else
                        RV_INT("Flare texture", dl->stage.sysFlareIdx)
                        RV_URI("Flare map",     &dl->stage.flare, "LightMaps")
                        RV_URI("Top map",       &dl->stage.up,    "LightMaps")
                        RV_URI("Bottom map",    &dl->stage.down,  "LightMaps")
                        RV_URI("Side map",      &dl->stage.sides, "LightMaps")
                        RV_END
                        CHECKSC;
                    }
                    sub++;
                }
                else RV_END
                CHECKSC;
            }
            prevDecorDefIdx = idx;
        }

        if(ISTOKEN("Group"))
        {
            int                 sub;
            ded_group_t*        grp;

            idx = DED_AddGroup(ded);
            grp = &ded->groups[idx];
            sub = 0;

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                if(ISLABEL("Texture") || ISLABEL("Flat"))
                {
                    ded_group_member_t* memb;
                    ddstring_t schemeName; Str_Init(&schemeName);
                    Str_Set(&schemeName, ISLABEL("Texture")? "Textures" : "Flats");

                    // Need to allocate new stage?
                    if(sub >= grp->count.num)
                        sub = DED_AddGroupMember(grp);
                    memb = &grp->members[sub];

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_URI("ID", &memb->material, Str_Text(&schemeName))
                        RV_INT("Tics", memb->tics)
                        RV_INT("Random", memb->randomTics)
                        RV_END
                        CHECKSC;
                    }
                    Str_Free(&schemeName);
                    ++sub;
                }
                else RV_FLAGS("Flags", grp->flags, "tgf_")
                RV_END
                CHECKSC;
            }
        }

        /*if(ISTOKEN("XGClass"))     // XG Class
        {
            // A new XG Class definition
            idx = DED_AddXGClass(ded);
            xgc = ded->xgClasses + idx;
            sub = 0;

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_STR("ID", xgc->id)
                RV_STR("Name", xgc->name)
                if(ISLABEL("Property"))
                {
                    ded_xgclass_property_t *xgcp = NULL;

                    if(sub >= xgc->properties_count.num)
                    {
                        // Allocate new property
                        sub = DED_AddXGClassProperty(xgc);
                    }

                    xgcp = &xgc->properties[sub];

                    FINDBEGIN;
                    for(;;)
                    {
                        READLABEL;
                        RV_FLAGS("ID", xgcp->id, "xgcp_")
                        RV_FLAGS("Flags", xgcp->flags, "xgcpf_")
                        RV_STR("Name", xgcp->name)
                        RV_STR("Flag Group", xgcp->flagprefix)
                        RV_END
                        CHECKSC;
                    }
                    sub++;
                }
                else RV_END
                CHECKSC;
            }
        }*/

        if(ISTOKEN("Line")) // Line Type
        {
            ded_linetype_t* l;

            // A new line type.
            idx = DED_AddLineType(ded, 0);
            l = &ded->lineTypes[idx];

            // Should we copy the previous definition?
            if(prevLineTypeDefIdx >= 0 && bCopyNext)
            {
                const ded_linetype_t* prevLineType = ded->lineTypes + prevLineTypeDefIdx;

                memcpy(l, prevLineType, sizeof(*l));

                if(l->actMaterial)   l->actMaterial   = Uri_Dup(l->actMaterial);
                if(l->deactMaterial) l->deactMaterial = Uri_Dup(l->deactMaterial);
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_INT("ID", l->id)
                RV_STR("Comment", l->comment)
                RV_FLAGS("Flags", l->flags[0], "ltf_")
                RV_FLAGS("Flags2", l->flags[1], "ltf2_")
                RV_FLAGS("Flags3", l->flags[2], "ltf3_")
                RV_FLAGS("Class", l->lineClass, "ltc_")
                RV_FLAGS("Type", l->actType, "lat_")
                RV_INT("Count", l->actCount)
                RV_FLT("Time", l->actTime)
                RV_INT("Act tag", l->actTag)
                RV_INT("Ap0", l->aparm[0])
                RV_INT("Ap1", l->aparm[1])
                RV_INT("Ap2", l->aparm[2])
                RV_INT("Ap3", l->aparm[3])
                RV_FLAGS("Ap4", l->aparm[4], "lref_")
                RV_INT("Ap5", l->aparm[5])
                RV_FLAGS("Ap6", l->aparm[6], "lref_")
                RV_INT("Ap7", l->aparm[7])
                RV_INT("Ap8", l->aparm[8])
                RV_STR("Ap9", l->aparm9)
                RV_INT("Health above", l->aparm[0])
                RV_INT("Health below", l->aparm[1])
                RV_INT("Power above", l->aparm[2])
                RV_INT("Power below", l->aparm[3])
                RV_FLAGS("Line act lref", l->aparm[4], "lref_")
                RV_INT("Line act lrefd", l->aparm[5])
                RV_FLAGS("Line inact lref", l->aparm[6], "lref_")
                RV_INT("Line inact lrefd", l->aparm[7])
                RV_INT("Color", l->aparm[8])
                RV_STR("Thing type", l->aparm9)
                RV_FLT("Ticker start time", l->tickerStart)
                RV_FLT("Ticker end time", l->tickerEnd)
                RV_INT("Ticker tics", l->tickerInterval)
                RV_STR("Act sound", l->actSound)
                RV_STR("Deact sound", l->deactSound)
                RV_INT("Event chain", l->evChain)
                RV_INT("Act chain", l->actChain)
                RV_INT("Deact chain", l->deactChain)
                RV_FLAGS("Wall section", l->wallSection, "lws_")
                if(ISLABEL("Act material"))
                {
                    READURI(&l->actMaterial, 0)
                }
                else if(ISLABEL("Act texture")) // Alias
                {
                    READURI(&l->actMaterial, "Textures")
                }
                else if(ISLABEL("Deact material"))
                {
                    READURI(&l->deactMaterial, 0)
                }
                else if(ISLABEL("Deact texture")) // Alias
                {
                    READURI(&l->deactMaterial, "Textures")
                }
                else
                RV_INT("Act type", l->actLineType)
                RV_INT("Deact type", l->deactLineType)
                RV_STR("Act message", l->actMsg)
                RV_STR("Deact message", l->deactMsg)
                RV_FLT("Texmove angle", l->materialMoveAngle)
                RV_FLT("Materialmove angle", l->materialMoveAngle) // Alias
                RV_FLT("Texmove speed", l->materialMoveSpeed)
                RV_FLT("Materialmove speed", l->materialMoveSpeed) // Alias
                RV_STR_INT("Ip0", l->iparmStr[0], l->iparm[0])
                RV_STR_INT("Ip1", l->iparmStr[1], l->iparm[1])
                RV_STR_INT("Ip2", l->iparmStr[2], l->iparm[2])
                RV_STR_INT("Ip3", l->iparmStr[3], l->iparm[3])
                RV_STR_INT("Ip4", l->iparmStr[4], l->iparm[4])
                RV_STR_INT("Ip5", l->iparmStr[5], l->iparm[5])
                RV_STR_INT("Ip6", l->iparmStr[6], l->iparm[6])
                RV_STR_INT("Ip7", l->iparmStr[7], l->iparm[7])
                RV_STR_INT("Ip8", l->iparmStr[8], l->iparm[8])
                RV_STR_INT("Ip9", l->iparmStr[9], l->iparm[9])
                RV_STR_INT("Ip10", l->iparmStr[10], l->iparm[10])
                RV_STR_INT("Ip11", l->iparmStr[11], l->iparm[11])
                RV_STR_INT("Ip12", l->iparmStr[12], l->iparm[12])
                RV_STR_INT("Ip13", l->iparmStr[13], l->iparm[13])
                RV_STR_INT("Ip14", l->iparmStr[14], l->iparm[14])
                RV_STR_INT("Ip15", l->iparmStr[15], l->iparm[15])
                RV_STR_INT("Ip16", l->iparmStr[16], l->iparm[16])
                RV_STR_INT("Ip17", l->iparmStr[17], l->iparm[17])
                RV_STR_INT("Ip18", l->iparmStr[18], l->iparm[18])
                RV_STR_INT("Ip19", l->iparmStr[19], l->iparm[19])
                RV_FLT("Fp0", l->fparm[0])
                RV_FLT("Fp1", l->fparm[1])
                RV_FLT("Fp2", l->fparm[2])
                RV_FLT("Fp3", l->fparm[3])
                RV_FLT("Fp4", l->fparm[4])
                RV_FLT("Fp5", l->fparm[5])
                RV_FLT("Fp6", l->fparm[6])
                RV_FLT("Fp7", l->fparm[7])
                RV_FLT("Fp8", l->fparm[8])
                RV_FLT("Fp9", l->fparm[9])
                RV_FLT("Fp10", l->fparm[10])
                RV_FLT("Fp11", l->fparm[11])
                RV_FLT("Fp12", l->fparm[12])
                RV_FLT("Fp13", l->fparm[13])
                RV_FLT("Fp14", l->fparm[14])
                RV_FLT("Fp15", l->fparm[15])
                RV_FLT("Fp16", l->fparm[16])
                RV_FLT("Fp17", l->fparm[17])
                RV_FLT("Fp18", l->fparm[18])
                RV_FLT("Fp19", l->fparm[19])
                RV_STR("Sp0", l->sparm[0])
                RV_STR("Sp1", l->sparm[1])
                RV_STR("Sp2", l->sparm[2])
                RV_STR("Sp3", l->sparm[3])
                RV_STR("Sp4", l->sparm[4])
                if(l->lineClass)
                {
                    // IpX Alt names can only be used if the class is defined first!
                    // they also support the DED v6 flags format.
                    int i;
                    for(i = 0; i < 20; ++i)
                    {
                        xgclassparm_t const& iParm = xgClassLinks[l->lineClass].iparm[i];

                        if(!ISLABEL(iParm.name)) continue;

                        if(iParm.flagPrefix && iParm.flagPrefix[0])
                        {
                            READFLAGS(l->iparm[i], iParm.flagPrefix)
                        }
                        else
                        {
                            READSTRING(l->iparmStr[i], l->iparm[i])
                        }
                        break;
                    }

                    // Not a known label?
                    if(i == 20) RV_END

                } else
                RV_END
                CHECKSC;
            }
            prevLineTypeDefIdx = idx;
        }

        if(ISTOKEN("Sector")) // Sector Type
        {
            ded_sectortype_t*   sec;

            // A new sector type.
            idx = DED_AddSectorType(ded, 0);
            sec = &ded->sectorTypes[idx];

            if(prevSectorTypeDefIdx >= 0 && bCopyNext)
            {
                // Should we copy the previous definition?
                memcpy(sec, ded->sectorTypes + prevSectorTypeDefIdx,
                       sizeof(*sec));
            }

            FINDBEGIN;
            for(;;)
            {
                READLABEL;
                RV_INT("ID", sec->id)
                RV_STR("Comment", sec->comment)
                RV_FLAGS("Flags", sec->flags, "stf_")
                RV_INT("Act tag", sec->actTag)
                RV_INT("Floor chain", sec->chain[0])
                RV_INT("Ceiling chain", sec->chain[1])
                RV_INT("Inside chain", sec->chain[2])
                RV_INT("Ticker chain", sec->chain[3])
                RV_FLAGS("Floor chain flags", sec->chainFlags[0], "scef_")
                RV_FLAGS("Ceiling chain flags", sec->chainFlags[1], "scef_")
                RV_FLAGS("Inside chain flags", sec->chainFlags[2], "scef_")
                RV_FLAGS("Ticker chain flags", sec->chainFlags[3], "scef_")
                RV_FLT("Floor chain start time", sec->start[0])
                RV_FLT("Ceiling chain start time", sec->start[1])
                RV_FLT("Inside chain start time", sec->start[2])
                RV_FLT("Ticker chain start time", sec->start[3])
                RV_FLT("Floor chain end time", sec->end[0])
                RV_FLT("Ceiling chain end time", sec->end[1])
                RV_FLT("Inside chain end time", sec->end[2])
                RV_FLT("Ticker chain end time", sec->end[3])
                RV_FLT("Floor chain min interval", sec->interval[0][0])
                RV_FLT("Ceiling chain min interval", sec->interval[1][0])
                RV_FLT("Inside chain min interval", sec->interval[2][0])
                RV_FLT("Ticker chain min interval", sec->interval[3][0])
                RV_FLT("Floor chain max interval", sec->interval[0][1])
                RV_FLT("Ceiling chain max interval", sec->interval[1][1])
                RV_FLT("Inside chain max interval", sec->interval[2][1])
                RV_FLT("Ticker chain max interval", sec->interval[3][1])
                RV_INT("Floor chain count", sec->count[0])
                RV_INT("Ceiling chain count", sec->count[1])
                RV_INT("Inside chain count", sec->count[2])
                RV_INT("Ticker chain count", sec->count[3])
                RV_STR("Ambient sound", sec->ambientSound)
                RV_FLT("Ambient min interval", sec->soundInterval[0])
                RV_FLT("Ambient max interval", sec->soundInterval[1])
                RV_FLT("Floor texmove angle", sec->materialMoveAngle[0])
                RV_FLT("Floor materialmove angle", sec->materialMoveAngle[0]) // Alias
                RV_FLT("Ceiling texmove angle", sec->materialMoveAngle[1])
                RV_FLT("Ceiling materialmove angle", sec->materialMoveAngle[1]) // Alias
                RV_FLT("Floor texmove speed", sec->materialMoveSpeed[0])
                RV_FLT("Floor materialmove speed", sec->materialMoveSpeed[0]) // Alias
                RV_FLT("Ceiling texmove speed", sec->materialMoveSpeed[1])
                RV_FLT("Ceiling materialmove speed", sec->materialMoveSpeed[1]) // Alias
                RV_FLT("Wind angle", sec->windAngle)
                RV_FLT("Wind speed", sec->windSpeed)
                RV_FLT("Vertical wind", sec->verticalWind)
                RV_FLT("Gravity", sec->gravity)
                RV_FLT("Friction", sec->friction)
                RV_STR("Light fn", sec->lightFunc)
                RV_INT("Light fn min tics", sec->lightInterval[0])
                RV_INT("Light fn max tics", sec->lightInterval[1])
                RV_STR("Red fn", sec->colFunc[0])
                RV_STR("Green fn", sec->colFunc[1])
                RV_STR("Blue fn", sec->colFunc[2])
                RV_INT("Red fn min tics", sec->colInterval[0][0])
                RV_INT("Red fn max tics", sec->colInterval[0][1])
                RV_INT("Green fn min tics", sec->colInterval[1][0])
                RV_INT("Green fn max tics", sec->colInterval[1][1])
                RV_INT("Blue fn min tics", sec->colInterval[2][0])
                RV_INT("Blue fn max tics", sec->colInterval[2][1])
                RV_STR("Floor fn", sec->floorFunc)
                RV_FLT("Floor fn scale", sec->floorMul)
                RV_FLT("Floor fn offset", sec->floorOff)
                RV_INT("Floor fn min tics", sec->floorInterval[0])
                RV_INT("Floor fn max tics", sec->floorInterval[1])
                RV_STR("Ceiling fn", sec->ceilFunc)
                RV_FLT("Ceiling fn scale", sec->ceilMul)
                RV_FLT("Ceiling fn offset", sec->ceilOff)
                RV_INT("Ceiling fn min tics", sec->ceilInterval[0])
                RV_INT("Ceiling fn max tics", sec->ceilInterval[1])
                RV_END
                CHECKSC;
            }
            prevSectorTypeDefIdx = idx;
        }
        bCopyNext = false;
    }

ded_end_read:
    M_Free(rootStr);

    // Free the source stack entry we were using.
    DED_CloseReader();

    Str_Free(&sourceFile);
    Str_Free(&sourceFileDir);

    return retVal;
}
/* *INDENT-ON* */

int DED_Read(ded_t* ded, const char* path)
{
    ddstring_t transPath;
    size_t bufferedDefSize;
    char* bufferedDef;
    filehandle_s* file;
    int result;

    // Compose the (possibly-translated) path.
    Str_InitStd(&transPath);
    Str_Set(&transPath, path);
    F_FixSlashes(&transPath, &transPath);
    F_ExpandBasePath(&transPath, &transPath);

    // Attempt to open a definition file on this path.
    file = F_Open(Str_Text(&transPath), "rb");
    if(!file)
    {
        SetError("File could not be opened for reading.");
        Str_Free(&transPath);
        return false;
    }

    // We will buffer a local copy of the file. How large a buffer do we need?
    FileHandle_Seek(file, 0, SeekEnd);
    bufferedDefSize = FileHandle_Tell(file);
    FileHandle_Rewind(file);
    bufferedDef = (char*) calloc(1, bufferedDefSize + 1);
    if(NULL == bufferedDef)
    {
        SetError("Out of memory while trying to buffer file for reading.");
        Str_Free(&transPath);
        return false;
    }

    // Copy the file into the local buffer and parse definitions.
    FileHandle_Read(file, (uint8_t*)bufferedDef, bufferedDefSize);
    F_Delete(file);
    result = DED_ReadData(ded, bufferedDef, Str_Text(&transPath));

    // Done. Release temporary storage and return the result.
    free(bufferedDef);
    Str_Free(&transPath);
    return result;
}

/**
 * Reads definitions from the given lump.
 */
int DED_ReadLump(ded_t* ded, lumpnum_t lumpNum)
{
    int lumpIdx;
    struct file1_s* file = F_FindFileForLumpNum2(lumpNum, &lumpIdx);
    if(file)
    {
        if(F_LumpLength(lumpNum) != 0)
        {
            uint8_t const* lumpPtr = F_CacheLump(file, lumpIdx);
            DED_ReadData(ded, (char const*)lumpPtr, Str_Text(F_ComposePath(file)));
            F_UnlockLump(file, lumpIdx);
        }
        return true;
    }
    SetError("Bad lump number.");
    return false;
}