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/*
* 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.
*/
/* (C) Marcin Kwadrans <quarter@users.sourceforge.net> */
#include "include/support.h"
#include "include/paritycommand.h"
#include "include/message.h"
class LWCommandBreak: public LWCommandSegment {
private:
LWSymbol *matchedSymbol;
public:
LWCommandBreak(): matchedSymbol(NULL) {};
LWValue *execute1 (LWContext *context, guint argc, LWValue *args[])
{
(void) context;
(void) argc;
(void) args;
enum BreakMode {
LW_BREAK_FOR,
LW_BREAK_REPEAT,
LW_BREAK_WHILE
} bm;
if (!g_ascii_strcasecmp (matchedSymbol->getName(), "to") ||
!g_ascii_strcasecmp (matchedSymbol->getName(), "downto"))
bm = LW_BREAK_FOR;
else
if (!g_ascii_strcasecmp (matchedSymbol->getName(), "repeat"))
bm = LW_BREAK_REPEAT;
else
if (!g_ascii_strcasecmp (matchedSymbol->getName(), "while"))
bm = LW_BREAK_WHILE;
else
g_return_val_if_reached (NULL);
for (GNode *n = context->instrPtr->parent; !G_NODE_IS_ROOT (n); n = n->parent) {
LWPiece *piece = (LWPiece *) n->data;
if (n->prev != NULL && !g_ascii_strcasecmp (piece->getSymbol()->getName(), "begin"))
piece = (LWPiece *) n->prev->data;
if (matchedSymbol == piece->getSymbol()) {
switch (bm) {
case LW_BREAK_FOR:
g_queue_pop_head(context->stack);
context->instrPtr = n->next;
break;
case LW_BREAK_REPEAT:
context->instrPtr = n->next->next;
break;
case LW_BREAK_WHILE:
context->instrPtr = n->next;
}
//When null, set correct command to execute, otherwise interpeter
//will get parent of current command (break), and that is probably
//not we want...
if (context->instrPtr == NULL)
context->instrPtr = n->parent;
return NULL;
}
}
g_return_val_if_reached (NULL);
}
const gchar *getName ()
{
return "break";
}
gchar *getHint ()
{
return _("Break the loop");
}
void checkArgc (guint n)
{
if (n != 0)
throw new LWMessage (LW_ERROR_WrongNumberOfArguments);
}
gboolean matchPrevCondition (LWCommand *cmd)
{
return (cmd->isLoop() || !g_ascii_strcasecmp (cmd->getName(), "repeat")) ? TRUE : FALSE;
}
gboolean matchWith (LWCommand *cmd)
{
if (cmd == NULL && matchedSymbol == NULL)
throw new LWMessage (LW_ERROR_BreakNotInALoop);
if (matchedSymbol == NULL) {
matchedSymbol = (LWSymbol *) cmd;
match();
}
return FALSE;
}
void reset1 ()
{
matchedSymbol = NULL;
LWCommandSegment::reset1();
}
gboolean isSegment ()
{
return (FALSE == isAlreadyMatched()) ? TRUE : FALSE;
}
};
LWSymbol *new_LWCommandBreak()
{
return new LWCommandBreak();
}
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