Engine directory for ticket #1

Engine/source/console/compiler.cpp

@@ -0,0 +1,289 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "platform/platform.h"
+#include "console/console.h"
+#include "console/telnetDebugger.h"
+#include "platform/event.h"
+
+#include "console/ast.h"
+#include "core/tAlgorithm.h"
+
+#include "core/strings/findMatch.h"
+#include "console/consoleInternal.h"
+#include "core/stream/fileStream.h"
+#include "console/compiler.h"
+
+#include "console/simBase.h"
+
+namespace Compiler
+{
+
+   F64 consoleStringToNumber(const char *str, StringTableEntry file, U32 line)
+   {
+      F64 val = dAtof(str);
+      if(val != 0)
+         return val;
+      else if(!dStricmp(str, "true"))
+         return 1;
+      else if(!dStricmp(str, "false"))
+         return 0;
+      else if(file)
+      {
+         Con::warnf(ConsoleLogEntry::General, "%s (%d): string always evaluates to 0.", file, line);
+         return 0;
+      }
+      return 0;
+   }
+
+   //------------------------------------------------------------
+
+   CompilerStringTable *gCurrentStringTable, gGlobalStringTable, gFunctionStringTable;
+   CompilerFloatTable  *gCurrentFloatTable,  gGlobalFloatTable,  gFunctionFloatTable;
+   DataChunker          gConsoleAllocator;
+   CompilerIdentTable   gIdentTable;
+   CodeBlock           *gCurBreakBlock;
+
+   //------------------------------------------------------------
+
+
+   CodeBlock *getBreakCodeBlock()         { return gCurBreakBlock; }
+   void setBreakCodeBlock(CodeBlock *cb)  { gCurBreakBlock = cb;   }
+
+   //------------------------------------------------------------
+
+   U32 evalSTEtoU32(StringTableEntry ste, U32)
+   {
+      return *((U32 *) &ste);
+   }
+
+   U32 compileSTEtoU32(StringTableEntry ste, U32 ip)
+   {
+      if(ste)
+         getIdentTable().add(ste, ip);
+      return 0;
+   }
+
+   U32 (*STEtoU32)(StringTableEntry ste, U32 ip) = evalSTEtoU32;
+
+   //------------------------------------------------------------
+
+   bool gSyntaxError = false;
+
+   //------------------------------------------------------------
+
+   CompilerStringTable *getCurrentStringTable()  { return gCurrentStringTable;  }
+   CompilerStringTable &getGlobalStringTable()   { return gGlobalStringTable;   }
+   CompilerStringTable &getFunctionStringTable() { return gFunctionStringTable; }
+
+   void setCurrentStringTable (CompilerStringTable* cst) { gCurrentStringTable  = cst; }
+
+   CompilerFloatTable *getCurrentFloatTable()    { return gCurrentFloatTable;   }
+   CompilerFloatTable &getGlobalFloatTable()     { return gGlobalFloatTable;    }
+   CompilerFloatTable &getFunctionFloatTable()   { return gFunctionFloatTable; }
+
+   void setCurrentFloatTable (CompilerFloatTable* cst) { gCurrentFloatTable  = cst; }
+
+   CompilerIdentTable &getIdentTable() { return gIdentTable; }
+
+   void precompileIdent(StringTableEntry ident)
+   {
+      if(ident)
+         gGlobalStringTable.add(ident);
+   }
+
+   void resetTables()
+   {
+      setCurrentStringTable(&gGlobalStringTable);
+      setCurrentFloatTable(&gGlobalFloatTable);
+      getGlobalFloatTable().reset();
+      getGlobalStringTable().reset();
+      getFunctionFloatTable().reset();
+      getFunctionStringTable().reset();
+      getIdentTable().reset();
+   }
+
+   void *consoleAlloc(U32 size) { return gConsoleAllocator.alloc(size);  }
+   void consoleAllocReset()     { gConsoleAllocator.freeBlocks(); }
+
+}
+
+//-------------------------------------------------------------------------
+
+using namespace Compiler;
+
+//-------------------------------------------------------------------------
+
+
+U32 CompilerStringTable::add(const char *str, bool caseSens, bool tag)
+{
+   // Is it already in?
+   Entry **walk;
+   for(walk = &list; *walk; walk = &((*walk)->next))
+   {
+      if((*walk)->tag != tag)
+         continue;
+
+      if(caseSens)
+      {
+         if(!dStrcmp((*walk)->string, str))
+            return (*walk)->start;
+      }
+      else
+      {
+         if(!dStricmp((*walk)->string, str))
+            return (*walk)->start;
+      }
+   }
+
+   // Write it out.
+   Entry *newStr = (Entry *) consoleAlloc(sizeof(Entry));
+   *walk = newStr;
+   newStr->next = NULL;
+   newStr->start = totalLen;
+   U32 len = dStrlen(str) + 1;
+   if(tag && len < 7) // alloc space for the numeric tag 1 for tag, 5 for # and 1 for nul
+      len = 7;
+   totalLen += len;
+   newStr->string = (char *) consoleAlloc(len);
+   newStr->len = len;
+   newStr->tag = tag;
+   dStrcpy(newStr->string, str);
+   return newStr->start;
+}
+
+U32 CompilerStringTable::addIntString(U32 value)
+{
+   dSprintf(buf, sizeof(buf), "%d", value);
+   return add(buf);
+}
+
+U32 CompilerStringTable::addFloatString(F64 value)
+{
+   dSprintf(buf, sizeof(buf), "%g", value);
+   return add(buf);
+}
+
+void CompilerStringTable::reset()
+{
+   list = NULL;
+   totalLen = 0;
+}
+
+char *CompilerStringTable::build()
+{
+   char *ret = new char[totalLen];
+   for(Entry *walk = list; walk; walk = walk->next)
+      dStrcpy(ret + walk->start, walk->string);
+   return ret;
+}
+
+void CompilerStringTable::write(Stream &st)
+{
+   st.write(totalLen);
+   for(Entry *walk = list; walk; walk = walk->next)
+      st.write(walk->len, walk->string);
+}
+
+//------------------------------------------------------------
+
+U32 CompilerFloatTable::add(F64 value)
+{
+   Entry **walk;
+   U32 i = 0;
+   for(walk = &list; *walk; walk = &((*walk)->next), i++)
+      if(value == (*walk)->val)
+         return i;
+   Entry *newFloat = (Entry *) consoleAlloc(sizeof(Entry));
+   newFloat->val = value;
+   newFloat->next = NULL;
+   count++;
+   *walk = newFloat;
+   return count-1;
+}
+void CompilerFloatTable::reset()
+{
+   list = NULL;
+   count = 0;
+}
+F64 *CompilerFloatTable::build()
+{
+   F64 *ret = new F64[count];
+   U32 i = 0;
+   for(Entry *walk = list; walk; walk = walk->next, i++)
+      ret[i] = walk->val;
+   return ret;
+}
+
+void CompilerFloatTable::write(Stream &st)
+{
+   st.write(count);
+   for(Entry *walk = list; walk; walk = walk->next)
+      st.write(walk->val);
+}
+
+//------------------------------------------------------------
+
+void CompilerIdentTable::reset()
+{
+   list = NULL;
+}
+
+void CompilerIdentTable::add(StringTableEntry ste, U32 ip)
+{
+   U32 index = gGlobalStringTable.add(ste, false);
+   Entry *newEntry = (Entry *) consoleAlloc(sizeof(Entry));
+   newEntry->offset = index;
+   newEntry->ip = ip;
+   for(Entry *walk = list; walk; walk = walk->next)
+   {
+      if(walk->offset == index)
+      {
+         newEntry->nextIdent = walk->nextIdent;
+         walk->nextIdent = newEntry;
+         return;
+      }
+   }
+   newEntry->next = list;
+   list = newEntry;
+   newEntry->nextIdent = NULL;
+}
+
+void CompilerIdentTable::write(Stream &st)
+{
+   U32 count = 0;
+   Entry * walk;
+   for(walk = list; walk; walk = walk->next)
+      count++;
+   st.write(count);
+   for(walk = list; walk; walk = walk->next)
+   {
+      U32 ec = 0;
+      Entry * el;
+      for(el = walk; el; el = el->nextIdent)
+         ec++;
+      st.write(walk->offset);
+      st.write(ec);
+      for(el = walk; el; el = el->nextIdent)
+         st.write(el->ip);
+   }
+}