C++ VStr::IsEmpty方法代码示例

VStr Info_ValueForKey(const VStr& s, const VStr& key)
{
    guard(Info_ValueForKey);
    if (s.IsEmpty() || key.IsEmpty())
    {
        return VStr();
    }

    if (s.Length() >= MAX_INFO_STRING)
    {
        Host_Error("Info_ValueForKey: oversize infostring");
    }

    int i = 0;
    if (s[i] == '\\')
        i++;
    while (1)
    {
        int Start = i;
        while (s[i] != '\\')
        {
            if (!s[i])
                return VStr();
            i++;
        }
        VStr pkey(s, Start, i - Start);
        i++;

        Start = i;
        while (s[i] != '\\' && s[i])
        {
            i++;
        }

        if (!key.ICmp(pkey))
            return VStr(s, Start, i - Start);

        if (!s[i])
            return VStr();
        i++;
    }
    unguard;
}

void Info_RemoveKey(VStr& s, const VStr& key)
{
    guard(Info_RemoveKey);
    if (s.IsEmpty())
    {
        return;
    }
    if (s.Length() >= MAX_INFO_STRING)
    {
        Host_Error("Info_RemoveKey: oversize infostring");
    }

    if (strchr(*key, '\\'))
    {
        GCon->Log("Can't use a key with a \\");
        return;
    }

    int i = 0;
    while (1)
    {
        int start = i;
        if (s[i] == '\\')
            i++;
        int KeyStart = i;
        while (s[i] != '\\')
        {
            if (!s[i])
                return;
            i++;
        }
        VStr pkey(s, KeyStart, i - KeyStart);
        i++;

        int ValStart = i;
        while (s[i] != '\\' && s[i])
        {
            i++;
        }
        VStr value(s, ValStart, i - ValStart);

        if (!key.Cmp(pkey))
        {
            s = VStr(s, 0, start) + VStr(s, i, s.Length() - i);	// remove this part
            return;
        }

        if (!s[i])
            return;
    }
    unguard;
}

void Info_SetValueForKey(VStr& s, const VStr& key, const VStr& value)
{
    guard(Info_SetValueForKey);
    if (s.Length() >= MAX_INFO_STRING)
    {
        Host_Error("Info_SetValueForKey: oversize infostring");
    }

    if (strchr(*key, '\\') || strchr(*value, '\\'))
    {
        GCon->Log("Can't use keys or values with a \\");
        return;
    }

    if (strchr(*key, '\"') || strchr(*value, '\"'))
    {
        GCon->Log("Can't use keys or values with a \"");
        return;
    }

    // this next line is kinda trippy
    VStr v = Info_ValueForKey(s, key);
    if (v.IsNotEmpty())
    {
        //	Key exists, make sure we have enough room for new value, if we
        // don't, don't change it!
        if (value.Length() - v.Length() + s.Length() > MAX_INFO_STRING)
        {
            GCon->Log("Info string length exceeded");
            return;
        }
    }

    Info_RemoveKey(s, key);
    if (value.IsEmpty())
        return;

    VStr newi = VStr("\\") + key + "\\" +  value;

    if (newi.Length() + s.Length() > MAX_INFO_STRING)
    {
        GCon->Log("Info string length exceeded");
        return;
    }

    s = s + newi;
    unguard;
}

static void ParseBase(const VStr& name)
{
	guard(ParseBase);
	TArray<version_t>	games;
	bool				select_game;
	VStr				UseName;

	if (fl_savedir.IsNotEmpty() && Sys_FileExists(fl_savedir + "/" + name))
	{
		UseName = fl_savedir + "/" + name;
	}
	else if (Sys_FileExists(fl_basedir + "/" + name))
	{
		UseName = fl_basedir + "/" + name;
	}
	else
	{
		return;
	}

	select_game = false;
	VScriptParser* sc = new VScriptParser(UseName, FL_OpenSysFileRead(UseName));
	while (!sc->AtEnd())
	{
		version_t &dst = games.Alloc();
		dst.ParmFound = 0;
		dst.FixVoices = false;
		sc->Expect("game");
		sc->ExpectString();
		dst.GameDir = sc->String;
		if (sc->Check("iwad"))
		{
			sc->ExpectString();
			dst.MainWad = sc->String;
		}
		while (sc->Check("addfile"))
		{
			sc->ExpectString();
			dst.AddFiles.Append(sc->String);
		}
		if (sc->Check("param"))
		{
			sc->ExpectString();
			dst.ParmFound = GArgs.CheckParm(*sc->String);
			if (dst.ParmFound)
			{
				select_game = true;
			}
		}
		if (sc->Check("fixvoices"))
		{
			dst.FixVoices = true;
		}
		sc->Expect("end");
	}
	delete sc;
	sc = NULL;

	for (int gi = games.Num() - 1; gi >= 0; gi--)
	{
		version_t& G = games[gi];
		if (select_game && !G.ParmFound)
		{
			continue;
		}
		if (fl_mainwad.IsNotEmpty())
		{
			if (G.MainWad.IsEmpty() || G.MainWad == fl_mainwad || select_game)
			{
				if (!bIwadAdded)
				{
					IWadIndex = SearchPaths.Num();
					VStr MainWadPath = FindMainWad(fl_mainwad);
					W_AddFile(MainWadPath, fl_savedir, G.FixVoices);
					bIwadAdded = true;
				}
				for (int j = 0; j < G.AddFiles.Num(); j++)
				{
					W_AddFile(fl_basedir + "/" + G.AddFiles[j], fl_savedir,
						false);
				}
				SetupGameDir(G.GameDir);
				return;
			}
			continue;
		}
		if (G.MainWad.IsEmpty())
		{
			continue;
		}

		//	Look for the main wad file.
		VStr MainWadPath = FindMainWad(G.MainWad);
		if (MainWadPath.IsNotEmpty())
		{
			fl_mainwad = G.MainWad;
			if (!bIwadAdded)
			{
				IWadIndex = SearchPaths.Num();
				W_AddFile(MainWadPath, fl_savedir, G.FixVoices);
//.........这里部分代码省略.........