SUBST: Dynamicaly generate contexts
[citadel.git] / webcit / subst.c
index 3b234f042eb11a9d2879e4f3b871cc910c7694f8..52f50f4489d3a4e9f4827c0bcbe8101b91688b91 100644 (file)
@@ -71,7 +71,7 @@ typedef struct _HashHandler {
        WCHandlerFunc HandlerFunc;
 }HashHandler;
 
-void *load_template(WCTemplate *NewTemplate);
+void *load_template(StrBuf *Target, WCTemplate *NewTemplate);
 int EvaluateConditional(StrBuf *Target, int Neg, int state, WCTemplputParams *TP);
 
 
@@ -83,38 +83,107 @@ typedef struct _SortStruct {
        CompareFunc Reverse;
        CompareFunc GroupChange;
 
-       long ContextType;
+       CtxType ContextType;
 }SortStruct;
 
-const char *CtxNames[]  = {
-       "Context NONE",
-       "Context SITECFG",
-       "Context SESSION",
-       "Context INETCFG",
-       "Context VNOTE",
-       "Context WHO",
-       "Context PREF",
-       "Context NODECONF",
-       "Context USERLIST",
-       "Context MAILSUM",
-       "Context MIME_ATACH",
-       "Context FILELIST",
-       "Context STRBUF",
-       "Context STRBUFARR",
-       "Context LONGVECTOR",
-       "Context ROOMS",
-       "Context FLOORS",
-       "Context ITERATE",
-       "Context ICAL",
-       "Context DavNamespace",
-       "Context TAB",
-       "Context VCARD",
-       "Context SIEVE List",
-       "Context SIEVE Script",
-       "Context UNKNOWN"
-};
+HashList *CtxList = NULL;
+
+static CtxType CtxCounter = CTX_NONE;
+
+CtxType CTX_STRBUF = CTX_NONE;
+CtxType CTX_STRBUFARR = CTX_NONE;
+CtxType CTX_LONGVECTOR = CTX_NONE;
+
+CtxType CTX_ITERATE = CTX_NONE;
+CtxType CTX_TAB = CTX_NONE;
+
+void HFreeContextType(void *pCtx)
+{
+       CtxTypeStruct *FreeStruct = (CtxTypeStruct *) pCtx;
+       FreeStrBuf(&FreeStruct->Name);
+       free(FreeStruct);
+}
+void PutContextType(const char *name, long len, CtxType TheCtx)
+{
+       CtxTypeStruct *NewStruct;
+
+       NewStruct = (CtxTypeStruct*) malloc(sizeof(CtxTypeStruct));
+       NewStruct->Name = NewStrBufPlain(name, len);
+       NewStruct->Type = TheCtx;
+
+       Put(CtxList, IKEY(NewStruct->Type), NewStruct, HFreeContextType);
+}
+void RegisterContextType(const char *name, long len, CtxType *TheCtx)
+{
+       if (*TheCtx != CTX_NONE)
+               return;
+
+       *TheCtx = ++CtxCounter;
+       PutContextType(name, len, *TheCtx);
+}
 
+CtxTypeStruct *GetContextType(CtxType Type)
+{
+       void *pv = NULL;
+       GetHash(CtxList, IKEY(Type), &pv);
+       return pv;
+}
 
+const char *UnknownContext = "CTX_UNKNOWN";
+
+const char *ContextName(CtxType ContextType)
+{
+       CtxTypeStruct *pCtx;
+
+       pCtx = GetContextType(ContextType);
+
+       if (pCtx != NULL) 
+               return ChrPtr(pCtx->Name);
+       else
+               return UnknownContext;
+}
+
+void StackContext(WCTemplputParams *Super, 
+                 WCTemplputParams *Sub, 
+                 void *Context,
+                 CtxType ContextType,
+                 int nArgs,
+                 WCTemplateToken *Tokens)
+{
+       memset(Sub, 0, sizeof(WCTemplputParams));
+
+       if (Super != NULL) {
+               Sub->Sub = Super->Sub;
+               Super->Sub = Sub;
+       }
+       Sub->Super = Super;
+       
+       Sub->Context = Context;
+       Sub->Filter.ContextType = ContextType;
+       Sub->nArgs = nArgs;
+       Sub->Tokens = Tokens;
+}
+
+void UnStackContext(WCTemplputParams *Sub)
+{
+       if (Sub->Super != NULL)
+       {
+               Sub->Super->Sub = Sub->Sub;
+       }
+}
+
+void *GetContextPayload(WCTemplputParams *TP, CtxType ContextType)
+{
+       WCTemplputParams *whichTP = TP;
+
+       if (ContextType == CTX_NONE)
+               return TP->Context;
+
+       while ((whichTP != NULL) && (whichTP->Filter.ContextType != ContextType))
+               whichTP = whichTP->Super;
+
+       return whichTP->Context;        
+}
 
 void DestroySortStruct(void *vSort)
 {
@@ -124,13 +193,6 @@ void DestroySortStruct(void *vSort)
        free (Sort);
 }
 
-const char *ContextName(int ContextType)
-{
-       if (ContextType < CTX_UNKNOWN)
-               return CtxNames[ContextType];
-       else
-               return CtxNames[CTX_UNKNOWN];
-}
 
 void LogTemplateError (StrBuf *Target, const char *Type, int ErrorPos, WCTemplputParams *TP, const char *Format, ...)
 {
@@ -160,23 +222,19 @@ void LogTemplateError (StrBuf *Target, const char *Type, int ErrorPos, WCTemplpu
        if (TP->Tokens != NULL) 
        {
                syslog(1, "%s [%s]  (in '%s' line %ld); %s; [%s]\n", 
-                       Type, 
-                       Err, 
-                       ChrPtr(TP->Tokens->FileName),
-                       TP->Tokens->Line, 
-                       ChrPtr(Error), 
-                       ChrPtr(TP->Tokens->FlatToken));
+                      Type, 
+                      Err, 
+                      ChrPtr(TP->Tokens->FileName),
+                      TP->Tokens->Line, 
+                      ChrPtr(Error), 
+                      ChrPtr(TP->Tokens->FlatToken));
        }
        else 
        {
                syslog(1, "%s: %s;\n", 
-                       Type, 
-                       ChrPtr(Error));
+                      Type, 
+                      ChrPtr(Error));
        }
-/*
-       if (Target == NULL) 
-               return;
-*/
        WCC = WC;
        if (WCC == NULL) {
                FreeStrBuf(&Info);
@@ -283,7 +341,7 @@ void RegisterNS(const char *NSName,
                int nMaxArgs, 
                WCHandlerFunc HandlerFunc, 
                WCPreevalFunc PreevalFunc,
-               int ContextRequired)
+               CtxType ContextRequired)
 {
        HashHandler *NewHandler;
        
@@ -292,38 +350,31 @@ void RegisterNS(const char *NSName,
        NewHandler->Filter.nMinArgs = nMinArgs;
        NewHandler->Filter.nMaxArgs = nMaxArgs;
        NewHandler->Filter.ContextType = ContextRequired;
-       NewHandler->Filter.ControlContextType = CTX_NONE;
 
        NewHandler->PreEvalFunc = PreevalFunc;
        NewHandler->HandlerFunc = HandlerFunc;  
        Put(GlobalNS, NSName, len, NewHandler, NULL);
 }
 
-void RegisterControlNS(const char *NSName, 
-                      long len, 
-                      int nMinArgs, 
-                      int nMaxArgs, 
-                      WCHandlerFunc HandlerFunc, 
-                      int ControlContextRequired)
+
+
+int CheckContext(StrBuf *Target, ContextFilter *Need, WCTemplputParams *TP, const char *ErrType)
 {
-       HashHandler *NewHandler;
+       WCTemplputParams *TPP = TP;
        
-       NewHandler = (HashHandler*) malloc(sizeof(HashHandler));
-       memset(NewHandler, 0, sizeof(HashHandler));
-       NewHandler->Filter.nMinArgs = nMinArgs;
-       NewHandler->Filter.nMaxArgs = nMaxArgs;
-       NewHandler->Filter.ContextType = CTX_NONE;
-       NewHandler->Filter.ControlContextType = ControlContextRequired;
-       NewHandler->HandlerFunc = HandlerFunc;  
-       Put(GlobalNS, NSName, len, NewHandler, NULL);
-}
+       if ((Need != NULL) &&
+           (Need->ContextType != CTX_NONE) && 
+           (Need->ContextType != TPP->Filter.ContextType)) {
 
+               while ((TPP != NULL) && 
+                      (Need->ContextType != TPP->Filter.ContextType))
+               {
+                       TPP = TPP->Super;
+               }
 
+               if (TPP != NULL)
+                       return 1;
 
-int CheckContext(StrBuf *Target, ContextFilter *Need, WCTemplputParams *TP, const char *ErrType)
-{
-       if ((Need->ContextType != CTX_NONE) && 
-           (Need->ContextType != TP->Filter.ContextType)) {
                 LogTemplateError(
                         Target, ErrType, ERR_PARM1, TP,
                        "  WARNING: requires Context: [%s], have [%s]!", 
@@ -331,16 +382,6 @@ int CheckContext(StrBuf *Target, ContextFilter *Need, WCTemplputParams *TP, cons
                        ContextName(TP->Filter.ContextType));
                return 0;
        }
-
-       if ((Need->ControlContextType != CTX_NONE) && 
-           (Need->ControlContextType != TP->Filter.ControlContextType)) {
-                LogTemplateError(
-                        Target, ErrType, ERR_PARM1, TP,
-                       "  WARNING: requires Control Context: [%s], have [%s]!", 
-                       ContextName(Need->ControlContextType), 
-                       ContextName(TP->Filter.ControlContextType));
-               return 0;
-       }
 /*                     
        if (TP->Tokens->nParameters < Need->nMinArgs) {
                LogTemplateError(Target, ErrType, ERR_NAME, TP,
@@ -392,35 +433,6 @@ void FreeWCTemplate(void *vFreeMe)
        free(FreeMe);
 }
 
-
-
-/**
- * \brief back end for print_value_of() ... does a server command
- * \param servcmd server command to execute on the citadel server
- */
-void pvo_do_cmd(StrBuf *Target, StrBuf *servcmd) {
-       char buf[SIZ];
-       int len;
-
-       serv_puts(ChrPtr(servcmd));
-       len = serv_getln(buf, sizeof buf);
-
-       switch(buf[0]) {
-               case '2':
-               case '3':
-               case '5':
-                       StrBufAppendPrintf(Target, "%s\n", &buf[4]);
-                       break;
-               case '1':
-                       _fmout(Target, "CENTER");
-                       break;
-               case '4':
-                       StrBufAppendPrintf(Target, "%s\n", &buf[4]);
-                       serv_puts("000");
-                       break;
-       }
-}
-
 int HaveTemplateTokenString(StrBuf *Target, 
                            WCTemplputParams *TP,
                            int N,
@@ -453,7 +465,7 @@ void GetTemplateTokenString(StrBuf *Target,
                            long *len)
 {
        StrBuf *Buf;
-       WCTemplputParams SubTP;
+///    WCTemplputParams SubTP;
 
        if (N >= TP->Tokens->nParameters) {
                LogTemplateError(Target, 
@@ -521,11 +533,9 @@ void GetTemplateTokenString(StrBuf *Target,
                        break;
                }
 
-               memset(&SubTP, 0, sizeof(WCTemplputParams *));
-               SubTP.Context = TP->Context;
-               SubTP.Filter.ContextType = TP->Filter.ContextType;
                Buf = NewStrBuf();
-               DoTemplate(TKEY(N), Buf, &SubTP);
+               DoTemplate(TKEY(N), Buf, TP);
+
                *Value = ChrPtr(Buf);
                *len = StrLength(Buf);
                /* we can't free it here, so we put it into the subst so its discarded later on. */
@@ -610,16 +620,15 @@ long GetTemplateTokenNumber(StrBuf *Target, WCTemplputParams *TP, int N, long df
 }
 
 
-/**
- * \brief puts string into the template and computes which escape methon we should use
- * \param Source the string we should put into the template
- * \param FormatTypeIndex where should we look for escape types if?
+/*
+ * puts string into the template and computes which escape methon we should use
+ * Source = the string we should put into the template
+ * FormatTypeIndex = where should we look for escape types if?
  */
 void StrBufAppendTemplate(StrBuf *Target, 
                          WCTemplputParams *TP,
                          const StrBuf *Source, int FormatTypeIndex)
 {
-        wcsession *WCC;
        const char *pFmt = NULL;
        char EscapeAs = ' ';
 
@@ -633,7 +642,6 @@ void StrBufAppendTemplate(StrBuf *Target,
        switch(EscapeAs)
        {
        case 'H':
-               WCC = WC;
                StrEscAppend(Target, Source, NULL, 0, 2);
                break;
        case 'X':
@@ -789,8 +797,10 @@ int GetNextParameter(StrBuf *Buf,
                else {
                        StrBufPeek(Buf, pch, -1, '\0');         
                        if (LoadTemplates > 1) {                        
-                               syslog(1, "DBG: got param [%s] %ld %ld\n", 
-                                       pchs, pche - pchs, strlen(pchs));
+                               syslog(1,
+                                       "DBG: got param [%s] %d %d\n", 
+                                       pchs, pche - pchs, strlen(pchs)
+                               );
                        }
                        Parm->Start = pchs;
                        Parm->len = pche - pchs;
@@ -1047,6 +1057,25 @@ WCTemplateToken *NewTemplateSubstitute(StrBuf *Buf,
        switch (NewToken->Flags) {
        case 0:
                /* If we're able to find out more about the token, do it now while its fresh. */
+               pch = NewToken->pName;
+               while (pch <  NewToken->pName + NewToken->NameEnd)
+               {
+                       if (((*pch >= 'A') && (*pch <= 'Z')) || 
+                           ((*pch >= '0') && (*pch <= '9')) ||
+                           (*pch == ':') || 
+                           (*pch == '-') ||
+                           (*pch == '_')) 
+                               pch ++;
+                       else
+                       {
+                               LogTemplateError(
+                                       NULL, "Token Name", ERR_NAME, &TP,
+                                       "contains illegal char: '%c'", 
+                                       *pch);
+                               pch++;
+                       }
+
+               }
                if (GetHash(GlobalNS, NewToken->pName, NewToken->NameEnd, &vVar)) {
                        HashHandler *Handler;
                        Handler = (HashHandler*) vVar;
@@ -1064,6 +1093,10 @@ WCTemplateToken *NewTemplateSubstitute(StrBuf *Buf,
                                if (Handler->PreEvalFunc != NULL)
                                        Handler->PreEvalFunc(NewToken);
                        }
+               } else {
+                       LogTemplateError(
+                               NULL, "Token ", ERR_NAME, &TP,
+                               " isn't known to us.");
                }
                break;
        case SV_GETTEXT:
@@ -1205,17 +1238,62 @@ void *duplicate_template(WCTemplate *OldTemplate)
        return NewTemplate;
 }
 
+
+void SanityCheckTemplate(StrBuf *Target, WCTemplate *CheckMe)
+{
+       int i = 0;
+       int j;
+       int FoundConditionalEnd;
+
+       for (i = 0; i < CheckMe->nTokensUsed; i++)
+       {
+               switch(CheckMe->Tokens[i]->Flags)
+               {
+               case SV_CONDITIONAL:
+               case SV_NEG_CONDITIONAL:
+                       FoundConditionalEnd = 0;
+                       if ((CheckMe->Tokens[i]->Params[0]->len == 1) && 
+                           (CheckMe->Tokens[i]->Params[0]->Start[0] == 'X'))
+                               break;
+                       for (j = i + 1; j < CheckMe->nTokensUsed; j++)
+                       {
+                               if (((CheckMe->Tokens[j]->Flags == SV_CONDITIONAL) ||
+                                    (CheckMe->Tokens[j]->Flags == SV_NEG_CONDITIONAL)) && 
+                                   (CheckMe->Tokens[i]->Params[1]->lvalue == 
+                                    CheckMe->Tokens[j]->Params[1]->lvalue))
+                               {
+                                       FoundConditionalEnd = 1;
+                                       break;
+                               }
+
+                       }
+                       if (!FoundConditionalEnd)
+                       {
+                               WCTemplputParams TP;
+                               memset(&TP, 0, sizeof(WCTemplputParams));
+                               TP.Tokens = CheckMe->Tokens[i];
+                               LogTemplateError(
+                                       Target, "Token", ERR_PARM1, &TP,
+                                       "Conditional without Endconditional"
+                                       );
+                       }
+                       break;
+               default:
+                       break;
+               }
+       }
+}
+
 /**
  * \brief Display a variable-substituted template
  * \param templatename template file to load
  */
-void *load_template(WCTemplate *NewTemplate)
+void *load_template(StrBuf *Target, WCTemplate *NewTemplate)
 {
        int fd;
        struct stat statbuf;
        const char *pS, *pE, *pch, *Err;
        long Line;
-       int pos;
 
        fd = open(ChrPtr(NewTemplate->FileName), O_RDONLY);
        if (fd <= 0) {
@@ -1235,7 +1313,6 @@ void *load_template(WCTemplate *NewTemplate)
                close(fd);
                syslog(1, "ERROR: reading template '%s' - %s<br>\n",
                        ChrPtr(NewTemplate->FileName), strerror(errno));
-               //FreeWCTemplate(NewTemplate);/////tODO
                return NULL;
        }
        close(fd);
@@ -1247,12 +1324,10 @@ void *load_template(WCTemplate *NewTemplate)
        pE = pS + StrLength(NewTemplate->Data);
        while (pch < pE) {
                const char *pts, *pte;
-               int InQuotes = 0;
-               int InDoubleQuotes = 0;
+               char InQuotes = '\0';
                void *pv;
 
                /** Find one <? > */
-               pos = (-1);
                for (; pch < pE; pch ++) {
                        if ((*pch=='<')&&(*(pch + 1)=='?') &&
                            !((pch == pS) && /* we must ommit a <?xml */
@@ -1268,13 +1343,24 @@ void *load_template(WCTemplate *NewTemplate)
 
                /** Found one? parse it. */
                for (; pch <= pE - 1; pch ++) {
-                       if (*pch == '"')
-                               InDoubleQuotes = ! InDoubleQuotes;
-                       else if (*pch == '\'')
-                               InQuotes = ! InQuotes;
-                       else if ((!InQuotes  && !InDoubleQuotes) &&
-                                ((*pch!='\\')&&(*(pch + 1)=='>'))) {
-                               pch ++;
+                       if ((!InQuotes) &&
+                           ((*pch == '\'') || (*pch == '"')))
+                       {
+                               InQuotes = *pch;
+                       }
+                       else if (InQuotes && (InQuotes == *pch))
+                       {
+                               InQuotes = '\0';
+                       }
+                       else if ((InQuotes) &&
+                                (*pch == '\\') &&
+                                (*(pch + 1) == InQuotes))
+                       {
+                               pch++;
+                       }
+                       else if ((!InQuotes) && 
+                                (*pch == '>'))
+                       {
                                break;
                        }
                }
@@ -1287,6 +1373,8 @@ void *load_template(WCTemplate *NewTemplate)
                        pch ++;
                }
        }
+
+       SanityCheckTemplate(NULL, NewTemplate);
        return NewTemplate;
 }
 
@@ -1333,7 +1421,7 @@ int LoadTemplateDir(const StrBuf *DirName, HashList *big, const StrBuf *BaseKey)
               (filedir_entry != NULL))
        {
                char *MinorPtr;
-               char *PStart;
+
 #ifdef _DIRENT_HAVE_D_NAMELEN
                d_namelen = filedir_entry->d_namelen;
                d_type = filedir_entry->d_type;
@@ -1410,7 +1498,6 @@ int LoadTemplateDir(const StrBuf *DirName, HashList *big, const StrBuf *BaseKey)
                            (strcmp(&filedir_entry->d_name[d_without_ext], ".orig") == 0) ||
                            (strcmp(&filedir_entry->d_name[d_without_ext], ".swp") == 0))
                                continue; /* Ignore backup files... */
-                       PStart = filedir_entry->d_name;
                        StrBufPrintf(FileName, "%s/%s", ChrPtr(DirName),  filedir_entry->d_name);
                        MinorPtr = strchr(filedir_entry->d_name, '.');
                        if (MinorPtr != NULL)
@@ -1486,7 +1573,7 @@ void InitTemplateCache(void)
                                              &vTemplate) && 
                               (vTemplate != NULL))
                        {
-                               load_template((WCTemplate *)vTemplate);
+                               load_template(NULL, (WCTemplate *)vTemplate);
                        }
                        DeleteHashPos(&At);
                }
@@ -1526,12 +1613,24 @@ int EvaluateToken(StrBuf *Target, int state, WCTemplputParams *TP)
                TmplGettext(Target, TP);
                break;
        case SV_CONDITIONAL: /** Forward conditional evaluation */
+               Handler = (HashHandler*) TP->Tokens->PreEval;
+               if (!CheckContext(Target, &Handler->Filter, TP, "Conditional")) {
+                       return -1;
+               }
                return EvaluateConditional(Target, 1, state, TP);
                break;
        case SV_NEG_CONDITIONAL: /** Reverse conditional evaluation */
+               Handler = (HashHandler*) TP->Tokens->PreEval;
+               if (!CheckContext(Target, &Handler->Filter, TP, "Conditional")) {
+                       return -1;
+               }
                return EvaluateConditional(Target, 0, state, TP);
                break;
        case SV_CUST_STR_CONDITIONAL: /** Conditional put custom strings from params */
+               Handler = (HashHandler*) TP->Tokens->PreEval;
+               if (!CheckContext(Target, &Handler->Filter, TP, "Conditional")) {
+                       return -1;
+               }
                if (TP->Tokens->nParameters >= 6) {
                        if (EvaluateConditional(Target, 0, state, TP)) {
                                GetTemplateTokenString(Target, TP, 5, &AppendMe, &AppendMeLen);
@@ -1598,14 +1697,15 @@ const StrBuf *ProcessTemplate(WCTemplate *Tmpl, StrBuf *Target, WCTemplputParams
        memcpy(&TP.Filter, &CallingTP->Filter, sizeof(ContextFilter));
 
        TP.Context = CallingTP->Context;
-       TP.ControlContext = CallingTP->ControlContext;
+       TP.Sub = CallingTP->Sub;
+       TP.Super = CallingTP->Super;
 
        if (LoadTemplates != 0) {                       
                if (LoadTemplates > 1)
                        syslog(1, "DBG: ----- loading:  [%s] ------ \n", 
                                ChrPtr(Tmpl->FileName));
                pTmpl = duplicate_template(Tmpl);
-               if(load_template(pTmpl) == NULL) {
+               if(load_template(Target, pTmpl) == NULL) {
                        StrBufAppendPrintf(
                                Target, 
                                "<pre>\nError loading Template [%s]\n See Logfile for details\n</pre>\n", 
@@ -1733,8 +1833,8 @@ void tmplput_Comment(StrBuf *Target, WCTemplputParams *TP)
 typedef struct _HashIterator {
        HashList *StaticList;
        int AdditionalParams;
-       int ContextType;
-       int XPectContextType;
+       CtxType ContextType;
+       CtxType XPectContextType;
        int Flags;
        RetrieveHashlistFunc GetHash;
        HashDestructorFunc Destructor;
@@ -1747,8 +1847,8 @@ void RegisterITERATOR(const char *Name, long len,
                      RetrieveHashlistFunc GetHash, 
                      SubTemplFunc DoSubTempl,
                      HashDestructorFunc Destructor,
-                     int ContextType, 
-                     int XPectContextType, 
+                     CtxType ContextType, 
+                     CtxType XPectContextType, 
                      int Flags)
 {
        HashIterator *It;
@@ -1830,6 +1930,7 @@ void tmpl_iterate_subtmpl(StrBuf *Target, WCTemplputParams *TP)
        void *vContext;
        void *vLastContext = NULL;
        StrBuf *SubBuf;
+       WCTemplputParams IterateTP;
        WCTemplputParams SubTP;
        IterateStruct Status;
 
@@ -1838,7 +1939,6 @@ void tmpl_iterate_subtmpl(StrBuf *Target, WCTemplputParams *TP)
        long StopAt = -1;
 
        memset(&Status, 0, sizeof(IterateStruct));
-       memcpy (&SubTP, &TP, sizeof(WCTemplputParams));
        
        It = (HashIterator*) TP->Tokens->Preeval2;
        if (It == NULL) {
@@ -1893,42 +1993,47 @@ void tmpl_iterate_subtmpl(StrBuf *Target, WCTemplputParams *TP)
                }
        }
        nMembersUsed = GetCount(List);
-       SubBuf = NewStrBuf();
-       SubTP.Filter.ContextType = It->ContextType;
-       SubTP.Filter.ControlContextType = CTX_ITERATE;
-       SubTP.ControlContext = &Status;
+
+       StackContext (TP, &IterateTP, &Status, CTX_ITERATE, 0, TP->Tokens);
+       {
+               SubBuf = NewStrBuf();
        
-       if (HAVE_PARAM(2)) {
-               StartAt = GetTemplateTokenNumber(Target, TP, 2, 0);
-       }
-       if (HAVE_PARAM(3)) {
-               StepWidth = GetTemplateTokenNumber(Target, TP, 3, 0);
-       }
-       if (HAVE_PARAM(4)) {
-               StopAt = GetTemplateTokenNumber(Target, TP, 4, -1);
-       }
-       it = GetNewHashPos(List, StepWidth);
-       if (StopAt < 0) {
-               StopAt = GetCount(List);
-       }
-       while (GetNextHashPos(List, it, &Status.KeyLen, &Status.Key, &vContext)) {
-               if ((Status.n >= StartAt) && (Status.n <= StopAt)) {
-                       if (DetectGroupChange && Status.n > 0) {
-                               Status.GroupChange = SortBy->GroupChange(vContext, vLastContext);
+               if (HAVE_PARAM(2)) {
+                       StartAt = GetTemplateTokenNumber(Target, TP, 2, 0);
+               }
+               if (HAVE_PARAM(3)) {
+                       StepWidth = GetTemplateTokenNumber(Target, TP, 3, 0);
+               }
+               if (HAVE_PARAM(4)) {
+                       StopAt = GetTemplateTokenNumber(Target, TP, 4, -1);
+               }
+               it = GetNewHashPos(List, StepWidth);
+               if (StopAt < 0) {
+                       StopAt = GetCount(List);
+               }
+               while (GetNextHashPos(List, it, &Status.KeyLen, &Status.Key, &vContext)) {
+                       if ((Status.n >= StartAt) && (Status.n <= StopAt)) {
+                               if (DetectGroupChange && Status.n > 0) {
+                                       Status.GroupChange = SortBy->GroupChange(vContext, vLastContext);
+                               }
+                               Status.LastN = (Status.n + 1) == nMembersUsed;
+                               StackContext(&IterateTP, &SubTP, vContext, It->ContextType, 0, NULL);
+                               {
+                                       if (It->DoSubTemplate != NULL)
+                                               It->DoSubTemplate(SubBuf, &SubTP);
+                                       DoTemplate(TKEY(1), SubBuf, &SubTP);
+
+                                       StrBufAppendBuf(Target, SubBuf, 0);
+                                       FlushStrBuf(SubBuf);
+                               }
+                               UnStackContext(&SubTP);
+                               Status.oddeven = ! Status.oddeven;
+                               vLastContext = vContext;
                        }
-                       Status.LastN = (Status.n + 1) == nMembersUsed;
-                       SubTP.Context = vContext;
-                       if (It->DoSubTemplate != NULL)
-                               It->DoSubTemplate(SubBuf, &SubTP);
-                       DoTemplate(TKEY(1), SubBuf, &SubTP);
-                       
-                       StrBufAppendBuf(Target, SubBuf, 0);
-                       FlushStrBuf(SubBuf);
-                       Status.oddeven = ! Status.oddeven;
-                       vLastContext = vContext;
+                       Status.n++;
                }
-               Status.n++;
        }
+       UnStackContext(&IterateTP);
        FreeStrBuf(&SubBuf);
        DeleteHashPos(&it);
        if (It->Destructor != NULL)
@@ -1938,7 +2043,7 @@ void tmpl_iterate_subtmpl(StrBuf *Target, WCTemplputParams *TP)
 
 int conditional_ITERATE_ISGROUPCHANGE(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
        if (TP->Tokens->nParameters < 3)
                return  Ctx->GroupChange;
 
@@ -1947,7 +2052,7 @@ int conditional_ITERATE_ISGROUPCHANGE(StrBuf *Target, WCTemplputParams *TP)
 
 void tmplput_ITERATE_ODDEVEN(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
        if (Ctx->oddeven)
                StrBufAppendBufPlain(Target, HKEY("odd"), 0);
        else
@@ -1957,7 +2062,7 @@ void tmplput_ITERATE_ODDEVEN(StrBuf *Target, WCTemplputParams *TP)
 
 void tmplput_ITERATE_KEY(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
 
        StrBufAppendBufPlain(Target, Ctx->Key, Ctx->KeyLen, 0);
 }
@@ -1965,19 +2070,19 @@ void tmplput_ITERATE_KEY(StrBuf *Target, WCTemplputParams *TP)
 
 void tmplput_ITERATE_LASTN(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
        StrBufAppendPrintf(Target, "%d", Ctx->n);
 }
 
 int conditional_ITERATE_FIRSTN(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
        return Ctx->n == 0;
 }
 
 int conditional_ITERATE_LASTN(StrBuf *Target, WCTemplputParams *TP)
 {
-       IterateStruct *Ctx = CCTX;
+       IterateStruct *Ctx = CTX(CTX_ITERATE);
        return Ctx->LastN;
 }
 
@@ -2007,6 +2112,7 @@ int EvaluateConditional(StrBuf *Target, int Neg, int state, WCTemplputParams *TP
        if (!CheckContext(Target, &Cond->Filter, TP, "Conditional")) {
                return 0;
        }
+
        res = Cond->CondF(Target, TP);
        if (res == Neg)
                rc = TP->Tokens->Params[1]->lvalue;
@@ -2031,25 +2137,6 @@ void RegisterConditional(const char *Name, long len,
        Cond->Filter.nMinArgs = nParams;
        Cond->CondF = CondF;
        Cond->Filter.ContextType = ContextRequired;
-       Cond->Filter.ControlContextType = CTX_NONE;
-       Put(Conditionals, Name, len, Cond, NULL);
-}
-
-void RegisterControlConditional(const char *Name, long len, 
-                               int nParams,
-                               WCConditionalFunc CondF, 
-                               int ControlContextRequired)
-{
-       ConditionalStruct *Cond;
-
-       Cond = (ConditionalStruct*)malloc(sizeof(ConditionalStruct));
-       memset(Cond, 0, sizeof(ConditionalStruct));
-       Cond->PlainName = Name;
-       Cond->Filter.nMaxArgs = nParams;
-       Cond->Filter.nMinArgs = nParams;
-       Cond->CondF = CondF;
-       Cond->Filter.ContextType = CTX_NONE;
-       Cond->Filter.ControlContextType = ControlContextRequired;
        Put(Conditionals, Name, len, Cond, NULL);
 }
 
@@ -2103,11 +2190,11 @@ HashList *Defines;
  */
 void tmplput_ContextString(StrBuf *Target, WCTemplputParams *TP)
 {
-       StrBufAppendTemplate(Target, TP, (StrBuf*)CTX, 0);
+       StrBufAppendTemplate(Target, TP, (StrBuf*)CTX(CTX_STRBUF), 0);
 }
 int ConditionalContextStr(StrBuf *Target, WCTemplputParams *TP)
 {
-       StrBuf *TokenText = (StrBuf*) CTX;
+       StrBuf *TokenText = (StrBuf*) CTX((CTX_STRBUF));
        const char *CompareToken;
        long len;
 
@@ -2117,7 +2204,7 @@ int ConditionalContextStr(StrBuf *Target, WCTemplputParams *TP)
 
 void tmplput_ContextStringArray(StrBuf *Target, WCTemplputParams *TP)
 {
-       HashList *Arr = (HashList*) CTX;
+       HashList *Arr = (HashList*) CTX(CTX_STRBUFARR);
        void *pV;
        int val;
 
@@ -2129,7 +2216,7 @@ void tmplput_ContextStringArray(StrBuf *Target, WCTemplputParams *TP)
 }
 int ConditionalContextStrinArray(StrBuf *Target, WCTemplputParams *TP)
 {
-       HashList *Arr = (HashList*) CTX;
+       HashList *Arr = (HashList*) CTX(CTX_STRBUFARR);
        void *pV;
        int val;
        const char *CompareToken;
@@ -2171,10 +2258,12 @@ void tmpl_do_boxed(StrBuf *Target, WCTemplputParams *TP)
                }
        }
        /* else TODO error? logging? */
-       memcpy (&SubTP, TP, sizeof(WCTemplputParams));
-       SubTP.Context = Headline;
-       SubTP.Filter.ContextType = CTX_STRBUF;
-       DoTemplate(HKEY("box_begin"), Target, &SubTP);
+
+       StackContext (TP, &SubTP, Headline, CTX_STRBUF, 0, NULL);
+       {
+               DoTemplate(HKEY("box_begin"), Target, &SubTP);
+       }
+       UnStackContext(&SubTP);
        DoTemplate(TKEY(0), Target, TP);
        DoTemplate(HKEY("box_end"), Target, TP);
        FreeStrBuf(&Headline);
@@ -2197,7 +2286,6 @@ int preeval_do_tabbed(WCTemplateToken *Token)
        long len;
        int i, nTabs;
 
-
        memset(&TPP, 0, sizeof(WCTemplputParams));
        TP = &TPP;
        TP->Tokens = Token;
@@ -2260,7 +2348,6 @@ void tmpl_do_tabbed(StrBuf *Target, WCTemplputParams *TP)
        WCTemplputParams SubTP;
 
        memset(&TS, 0, sizeof(tab_struct));
-       memcpy (&SubTP, &TP, sizeof(WCTemplputParams));
 
        nTabs = ntabs = TP->Tokens->nParameters / 2;
        TabNames = (StrBuf **) malloc(ntabs * sizeof(StrBuf*));
@@ -2287,33 +2374,37 @@ void tmpl_do_tabbed(StrBuf *Target, WCTemplputParams *TP)
                        nTabs --;
                }
        }
-       memcpy (&SubTP, TP, sizeof(WCTemplputParams));
-       SubTP.Filter.ControlContextType = CTX_TAB;
-       SubTP.ControlContext = &TS;
+       StackContext (TP, &SubTP, &TS, CTX_TAB, 0, NULL);
+       {
+////   TODO jetzt      memcpy (&SubTP, TP, sizeof(WCTemplputParams));
+//             SubTP.Filter.ControlContextType = ;
 
-       StrTabbedDialog(Target, nTabs, TabNames);
-       for (i = 0; i < ntabs; i++) {
-               memset(&TS, 0, sizeof(tab_struct));
-               TS.CurrentTab = i;
-               TS.TabTitle = TabNames[i];
-               StrBeginTab(Target, i, nTabs, TabNames);
-               DoTemplate(TKEY(i * 2 + 1), Target, &SubTP);
-               StrEndTab(Target, i, nTabs);
+               StrTabbedDialog(Target, nTabs, TabNames);
+               for (i = 0; i < ntabs; i++) {
+                       memset(&TS, 0, sizeof(tab_struct));
+                       TS.CurrentTab = i;
+                       TS.TabTitle = TabNames[i];
+                       StrBeginTab(Target, i, nTabs, TabNames);
+                       DoTemplate(TKEY(i * 2 + 1), Target, &SubTP);
+                       StrEndTab(Target, i, nTabs);
+               }
+               for (i = 0; i < ntabs; i++) 
+                       FreeStrBuf(&TabNames[i]);
+               free(TabNames);
        }
-       for (i = 0; i < ntabs; i++) 
-               FreeStrBuf(&TabNames[i]);
+       UnStackContext(&SubTP);
 }
 
 void tmplput_TAB_N(StrBuf *Target, WCTemplputParams *TP)
 {
-       tab_struct *Ctx = CCTX;
+       tab_struct *Ctx = CTX(CTX_TAB);
 
        StrBufAppendPrintf(Target, "%d", Ctx->CurrentTab);
 }
 
 void tmplput_TAB_TITLE(StrBuf *Target, WCTemplputParams *TP)
 {
-       tab_struct *Ctx = CCTX;
+       tab_struct *Ctx = CTX(CTX_TAB);
        StrBufAppendTemplate(Target, TP, Ctx->TabTitle, 0);
 }
 
@@ -2327,7 +2418,7 @@ void RegisterSortFunc(const char *name, long len,
                      CompareFunc Forward, 
                      CompareFunc Reverse, 
                      CompareFunc GroupChange, 
-                     long ContextType)
+                     CtxType ContextType)
 {
        SortStruct *NewSort;
 
@@ -2354,7 +2445,6 @@ CompareFunc RetrieveSort(WCTemplputParams *TP,
                         const char *OtherPrefix, long OtherPrefixLen,
                         const char *Default, long ldefault, long DefaultDirection)
 {
-       int isdefault = 0;
        const StrBuf *BSort = NULL;
        SortStruct *SortBy;
        void *vSortBy;
@@ -2388,7 +2478,6 @@ CompareFunc RetrieveSort(WCTemplputParams *TP,
 
        if (!GetHash(SortHash, SKEY(BSort), &vSortBy) || 
            (vSortBy == NULL)) {
-               isdefault = 1;
                if (!GetHash(SortHash, Default, ldefault, &vSortBy) || 
                    (vSortBy == NULL)) {
                        LogTemplateError(
@@ -2602,7 +2691,7 @@ void tmplput_SORT_ORDER(StrBuf *Target, WCTemplputParams *TP)
 
 void tmplput_long_vector(StrBuf *Target, WCTemplputParams *TP)
 {
-       long *LongVector = (long*) CTX;
+       long *LongVector = (long*) CTX(CTX_LONGVECTOR);
 
        if ((TP->Tokens->Params[0]->Type == TYPE_LONG) && 
            (TP->Tokens->Params[0]->lvalue <= LongVector[0]))
@@ -2645,7 +2734,7 @@ void dbg_print_longvector(long *LongVector)
 
 int ConditionalLongVector(StrBuf *Target, WCTemplputParams *TP)
 {
-       long *LongVector = (long*) CTX;
+       long *LongVector = (long*) CTX(CTX_LONGVECTOR);
 
        if ((TP->Tokens->Params[2]->Type == TYPE_LONG) && 
            (TP->Tokens->Params[2]->lvalue <= LongVector[0])&&
@@ -2685,6 +2774,9 @@ void
 InitModule_SUBST
 (void)
 {
+       RegisterCTX(CTX_TAB);
+       RegisterCTX(CTX_ITERATE);
+
        memset(&NoCtx, 0, sizeof(WCTemplputParams));
        RegisterNamespace("--", 0, 2, tmplput_Comment, NULL, CTX_NONE);
        RegisterNamespace("SORT:ICON", 1, 2, tmplput_SORT_ICON, NULL, CTX_NONE);
@@ -2695,8 +2787,8 @@ InitModule_SUBST
        RegisterNamespace("ITERATE", 2, 100, tmpl_iterate_subtmpl, preeval_iterate, CTX_NONE);
        RegisterNamespace("DOBOXED", 1, 2, tmpl_do_boxed, NULL, CTX_NONE);
        RegisterNamespace("DOTABBED", 2, 100, tmpl_do_tabbed, preeval_do_tabbed, CTX_NONE);
-       RegisterControlNS(HKEY("TAB:N"), 0, 0, tmplput_TAB_N, CTX_TAB);
-       RegisterControlNS(HKEY("TAB:SUBJECT"), 0, 1, tmplput_TAB_TITLE, CTX_TAB);
+       RegisterNamespace("TAB:N", 0, 0, tmplput_TAB_N, NULL, CTX_TAB);
+       RegisterNamespace("TAB:SUBJECT", 0, 1, tmplput_TAB_TITLE, NULL, CTX_TAB);
 
 
        RegisterNamespace("LONGVECTOR", 1, 1, tmplput_long_vector, NULL, CTX_LONGVECTOR);
@@ -2707,19 +2799,19 @@ InitModule_SUBST
        RegisterConditional(HKEY("COND:LONGVECTOR"), 4, ConditionalLongVector, CTX_LONGVECTOR);
 
 
-       RegisterControlConditional(HKEY("COND:ITERATE:ISGROUPCHANGE"), 2, 
-                                  conditional_ITERATE_ISGROUPCHANGE, 
-                                  CTX_ITERATE);
-       RegisterControlConditional(HKEY("COND:ITERATE:LASTN"), 2, 
-                                  conditional_ITERATE_LASTN, 
-                                  CTX_ITERATE);
-       RegisterControlConditional(HKEY("COND:ITERATE:FIRSTN"), 2, 
-                                  conditional_ITERATE_FIRSTN, 
-                                  CTX_ITERATE);
+       RegisterConditional(HKEY("COND:ITERATE:ISGROUPCHANGE"), 2, 
+                           conditional_ITERATE_ISGROUPCHANGE, 
+                           CTX_ITERATE);
+       RegisterConditional(HKEY("COND:ITERATE:LASTN"), 2, 
+                           conditional_ITERATE_LASTN, 
+                           CTX_ITERATE);
+       RegisterConditional(HKEY("COND:ITERATE:FIRSTN"), 2, 
+                           conditional_ITERATE_FIRSTN, 
+                           CTX_ITERATE);
 
-       RegisterControlNS(HKEY("ITERATE:ODDEVEN"), 0, 0, tmplput_ITERATE_ODDEVEN, CTX_ITERATE);
-       RegisterControlNS(HKEY("ITERATE:KEY"), 0, 0, tmplput_ITERATE_KEY, CTX_ITERATE);
-       RegisterControlNS(HKEY("ITERATE:N"), 0, 0, tmplput_ITERATE_LASTN, CTX_ITERATE);
+       RegisterNamespace("ITERATE:ODDEVEN", 0, 0, tmplput_ITERATE_ODDEVEN, NULL, CTX_ITERATE);
+       RegisterNamespace("ITERATE:KEY", 0, 0, tmplput_ITERATE_KEY, NULL, CTX_ITERATE);
+       RegisterNamespace("ITERATE:N", 0, 0, tmplput_ITERATE_LASTN, NULL, CTX_ITERATE);
        RegisterNamespace("CURRENTFILE", 0, 1, tmplput_CURRENT_FILE, NULL, CTX_NONE);
        RegisterNamespace("DEF:STR", 1, 1, tmplput_DefStr, NULL, CTX_NONE);
        RegisterNamespace("DEF:VAL", 1, 1, tmplput_DefVal, NULL, CTX_NONE);
@@ -2741,6 +2833,13 @@ ServerStartModule_SUBST
        Conditionals = NewHash(1, NULL);
        SortHash = NewHash(1, NULL);
        Defines = NewHash(1, NULL);
+       CtxList = NewHash(1, NULL);
+       
+       PutContextType(HKEY("CTX_NONE"), 0);
+
+       RegisterCTX(CTX_STRBUF);
+       RegisterCTX(CTX_STRBUFARR);
+       RegisterCTX(CTX_LONGVECTOR);
 }
 
 void
@@ -2762,6 +2861,7 @@ ServerShutdownModule_SUBST
        DeleteHash(&Conditionals);
        DeleteHash(&SortHash);
        DeleteHash(&Defines);
+       DeleteHash(&CtxList);
 }