Torque3D/Engine/source/console/consoleInternal.cpp
2021-04-03 01:53:40 -04:00

1893 lines
49 KiB
C++

//-----------------------------------------------------------------------------
// 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 <unordered_map>
#include "platform/platform.h"
#include "console/console.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/engineAPI.h"
//#define DEBUG_SPEW
#define ST_INIT_SIZE 15
static char scratchBuffer[1024];
U32 Namespace::mCacheSequence = 0;
DataChunker Namespace::mCacheAllocator;
DataChunker Namespace::mAllocator;
Namespace *Namespace::mNamespaceList = NULL;
Namespace *Namespace::mGlobalNamespace = NULL;
namespace std
{
template<> struct hash<std::pair<StringTableEntry, StringTableEntry>>
{
typedef std::pair<StringTableEntry, StringTableEntry> argument_type;
typedef size_t result_type;
result_type operator()(argument_type const& s) const
{
return HashPointer(s.first) ^ (HashPointer(s.second) << 1);
}
};
};
std::unordered_map<std::pair<StringTableEntry, StringTableEntry>, Namespace*> gNamespaceCache;
bool canTabComplete(const char *prevText, const char *bestMatch,
const char *newText, S32 baseLen, bool fForward)
{
// test if it matches the first baseLen chars:
if (dStrnicmp(newText, prevText, baseLen))
return false;
if (fForward)
{
if (!bestMatch)
return dStricmp(newText, prevText) > 0;
else
return (dStricmp(newText, prevText) > 0) &&
(dStricmp(newText, bestMatch) < 0);
}
else
{
if (dStrlen(prevText) == (U32)baseLen)
{
// look for the 'worst match'
if (!bestMatch)
return dStricmp(newText, prevText) > 0;
else
return dStricmp(newText, bestMatch) > 0;
}
else
{
if (!bestMatch)
return (dStricmp(newText, prevText) < 0);
else
return (dStricmp(newText, prevText) < 0) &&
(dStricmp(newText, bestMatch) > 0);
}
}
}
//---------------------------------------------------------------
//
// Dictionary functions
//
//---------------------------------------------------------------
struct StringValue
{
S32 size;
char *val;
operator char *() { return val; }
StringValue &operator=(const char *string);
StringValue() { size = 0; val = NULL; }
~StringValue() { dFree(val); }
};
StringValue & StringValue::operator=(const char *string)
{
if (!val)
{
val = dStrdup(string);
size = dStrlen(val);
}
else
{
S32 len = dStrlen(string);
if (len < size)
dStrcpy(val, string, size);
else
{
size = len;
dFree(val);
val = dStrdup(string);
}
}
return *this;
}
static S32 QSORT_CALLBACK varCompare(const void* a, const void* b)
{
return dStricmp((*((Dictionary::Entry **) a))->name, (*((Dictionary::Entry **) b))->name);
}
void Dictionary::exportVariables(const char *varString, const char *fileName, bool append)
{
const char *searchStr = varString;
Vector<Entry *> sortList(__FILE__, __LINE__);
for (S32 i = 0; i < hashTable->size; i++)
{
Entry *walk = hashTable->data[i];
while (walk)
{
if (FindMatch::isMatch((char *)searchStr, (char *)walk->name))
sortList.push_back(walk);
walk = walk->nextEntry;
}
}
if (!sortList.size())
return;
dQsort((void *)&sortList[0], sortList.size(), sizeof(Entry *), varCompare);
Vector<Entry *>::iterator s;
char expandBuffer[1024];
FileStream *strm = NULL;
if (fileName)
{
if ((strm = FileStream::createAndOpen(fileName, append ? Torque::FS::File::ReadWrite : Torque::FS::File::Write)) == NULL)
{
Con::errorf(ConsoleLogEntry::General, "Unable to open file '%s for writing.", fileName);
return;
}
if (append)
strm->setPosition(strm->getStreamSize());
}
char buffer[1024];
const char *cat = fileName ? "\r\n" : "";
for (s = sortList.begin(); s != sortList.end(); s++)
{
switch ((*s)->value.getType())
{
case ConsoleValueType::cvInteger:
dSprintf(buffer, sizeof(buffer), "%s = %d;%s", (*s)->name, (*s)->value.getInt(), cat);
break;
case ConsoleValueType::cvFloat:
dSprintf(buffer, sizeof(buffer), "%s = %g;%s", (*s)->name, (*s)->value.getFloat(), cat);
break;
default:
expandEscape(expandBuffer, (*s)->getStringValue());
dSprintf(buffer, sizeof(buffer), "%s = \"%s\";%s", (*s)->name, expandBuffer, cat);
break;
}
if (strm)
strm->write(dStrlen(buffer), buffer);
else
Con::printf("%s", buffer);
}
if (strm)
delete strm;
}
void Dictionary::exportVariables(const char *varString, Vector<String> *names, Vector<String> *values)
{
const char *searchStr = varString;
Vector<Entry *> sortList(__FILE__, __LINE__);
for (S32 i = 0; i < hashTable->size; i++)
{
Entry *walk = hashTable->data[i];
while (walk)
{
if (FindMatch::isMatch((char*)searchStr, (char*)walk->name))
sortList.push_back(walk);
walk = walk->nextEntry;
}
}
if (!sortList.size())
return;
dQsort((void *)&sortList[0], sortList.size(), sizeof(Entry *), varCompare);
if (names)
names->reserve(sortList.size());
if (values)
values->reserve(sortList.size());
char expandBuffer[1024];
Vector<Entry *>::iterator s;
for (s = sortList.begin(); s != sortList.end(); s++)
{
if (names)
names->push_back(String((*s)->name));
if (values)
{
switch ((*s)->value.getType())
{
case ConsoleValueType::cvInteger:
case ConsoleValueType::cvFloat:
values->push_back(String((*s)->value.getString()));
break;
default:
expandEscape(expandBuffer, (*s)->getStringValue());
values->push_back(expandBuffer);
break;
}
}
}
}
void Dictionary::deleteVariables(const char *varString)
{
const char *searchStr = varString;
for (S32 i = 0; i < hashTable->size; i++)
{
Entry *walk = hashTable->data[i];
while (walk)
{
Entry *matchedEntry = (FindMatch::isMatch((char *)searchStr, (char *)walk->name)) ? walk : NULL;
walk = walk->nextEntry;
if (matchedEntry)
remove(matchedEntry); // assumes remove() is a stable remove (will not reorder entries on remove)
}
}
}
U32 HashPointer(StringTableEntry ptr)
{
return (U32)(((dsize_t)ptr) >> 2);
}
Dictionary::Entry *Dictionary::lookup(StringTableEntry name)
{
Entry *walk = hashTable->data[HashPointer(name) % hashTable->size];
while (walk)
{
if (walk->name == name)
return walk;
else
walk = walk->nextEntry;
}
return NULL;
}
Dictionary::Entry *Dictionary::add(StringTableEntry name)
{
// Try to find an existing match.
//printf("Add Variable %s\n", name);
Entry* ret = lookup(name);
if (ret)
return ret;
// Rehash if the table get's too crowded. Be aware that this might
// modify a table that we don't own.
hashTable->count++;
if (hashTable->count > hashTable->size * 2)
{
// Allocate a new table.
const U32 newTableSize = hashTable->size * 4 - 1;
Entry** newTableData = new Entry*[newTableSize];
dMemset(newTableData, 0, newTableSize * sizeof(Entry*));
// Move the entries over.
for (U32 i = 0; i < hashTable->size; ++i)
for (Entry* entry = hashTable->data[i]; entry != NULL; )
{
Entry* next = entry->nextEntry;
U32 index = HashPointer(entry->name) % newTableSize;
entry->nextEntry = newTableData[index];
newTableData[index] = entry;
entry = next;
}
// Switch the tables.
delete[] hashTable->data;
hashTable->data = newTableData;
hashTable->size = newTableSize;
}
#ifdef DEBUG_SPEW
Platform::outputDebugString("[ConsoleInternal] Adding entry '%s'", name);
#endif
// Add the new entry.
ret = hashTable->mChunker.alloc();
constructInPlace(ret, name);
U32 idx = HashPointer(name) % hashTable->size;
ret->nextEntry = hashTable->data[idx];
hashTable->data[idx] = ret;
return ret;
}
// deleteVariables() assumes remove() is a stable remove (will not reorder entries on remove)
void Dictionary::remove(Dictionary::Entry *ent)
{
Entry **walk = &hashTable->data[HashPointer(ent->name) % hashTable->size];
while (*walk != ent)
walk = &((*walk)->nextEntry);
#ifdef DEBUG_SPEW
Platform::outputDebugString("[ConsoleInternal] Removing entry '%s'", ent->name);
#endif
*walk = (ent->nextEntry);
destructInPlace(ent);
hashTable->mChunker.free(ent);
hashTable->count--;
}
Dictionary::Dictionary()
: hashTable(NULL),
#pragma warning( disable : 4355 )
ownHashTable(this), // Warning with VC++ but this is safe.
#pragma warning( default : 4355 )
exprState(NULL),
scopeName(NULL),
scopeNamespace(NULL),
code(NULL),
ip(0)
{
}
void Dictionary::setState(ExprEvalState *state, Dictionary* ref)
{
exprState = state;
if (ref)
{
hashTable = ref->hashTable;
return;
}
if (!ownHashTable.data)
{
ownHashTable.count = 0;
ownHashTable.size = ST_INIT_SIZE;
ownHashTable.data = new Entry *[ownHashTable.size];
dMemset(ownHashTable.data, 0, ownHashTable.size * sizeof(Entry*));
}
hashTable = &ownHashTable;
}
Dictionary::~Dictionary()
{
reset();
if (ownHashTable.data)
delete[] ownHashTable.data;
}
void Dictionary::reset()
{
if (hashTable && hashTable->owner != this)
{
hashTable = NULL;
return;
}
for (U32 i = 0; i < ownHashTable.size; ++i)
{
Entry* walk = ownHashTable.data[i];
while (walk)
{
Entry* temp = walk->nextEntry;
destructInPlace(walk);
walk = temp;
}
}
dMemset(ownHashTable.data, 0, ownHashTable.size * sizeof(Entry*));
ownHashTable.mChunker.freeBlocks(true);
ownHashTable.count = 0;
hashTable = NULL;
scopeName = NULL;
scopeNamespace = NULL;
code = NULL;
ip = 0;
}
const char *Dictionary::tabComplete(const char *prevText, S32 baseLen, bool fForward)
{
S32 i;
const char *bestMatch = NULL;
for (i = 0; i < hashTable->size; i++)
{
Entry *walk = hashTable->data[i];
while (walk)
{
if (canTabComplete(prevText, bestMatch, walk->name, baseLen, fForward))
bestMatch = walk->name;
walk = walk->nextEntry;
}
}
return bestMatch;
}
char *typeValueEmpty = "";
Dictionary::Entry::Entry(StringTableEntry in_name)
{
name = in_name;
notify = NULL;
nextEntry = NULL;
mUsage = NULL;
mIsConstant = false;
mNext = NULL;
// NOTE: This is data inside a nameless
// union, so we don't need to init the rest.
value.init();
}
Dictionary::Entry::~Entry()
{
if (notify)
delete notify;
}
const char *Dictionary::getVariable(StringTableEntry name, bool *entValid)
{
Entry *ent = lookup(name);
if (ent)
{
if (entValid)
*entValid = true;
return ent->getStringValue();
}
if (entValid)
*entValid = false;
// Warn users when they access a variable that isn't defined.
if (gWarnUndefinedScriptVariables)
Con::warnf(" *** Accessed undefined variable '%s'", name);
return "";
}
S32 Dictionary::getIntVariable(StringTableEntry name, bool *entValid)
{
Entry *ent = lookup(name);
if (ent)
{
if (entValid)
*entValid = true;
return ent->getIntValue();
}
if (entValid)
*entValid = false;
return 0;
}
F32 Dictionary::getFloatVariable(StringTableEntry name, bool *entValid)
{
Entry *ent = lookup(name);
if (ent)
{
if (entValid)
*entValid = true;
return ent->getFloatValue();
}
if (entValid)
*entValid = false;
return 0;
}
void Dictionary::setVariable(StringTableEntry name, const char *value)
{
Entry *ent = add(name);
if (!value)
value = "";
ent->setStringValue(value);
}
Dictionary::Entry* Dictionary::addVariable(const char *name,
S32 type,
void *dataPtr,
const char* usage)
{
AssertFatal(type >= 0, "Dictionary::addVariable - Got bad type!");
if (name[0] != '$')
{
scratchBuffer[0] = '$';
dStrcpy(scratchBuffer + 1, name, 1023);
name = scratchBuffer;
}
Entry *ent = add(StringTable->insert(name));
ent->mUsage = usage;
// Fetch enum table, if any.
ConsoleBaseType* conType = ConsoleBaseType::getType(type);
AssertFatal(conType, "Dictionary::addVariable - invalid console type");
ent->value.setConsoleData(type, dataPtr, conType->getEnumTable());
return ent;
}
bool Dictionary::removeVariable(StringTableEntry name)
{
if (Entry *ent = lookup(name))
{
remove(ent);
return true;
}
return false;
}
void Dictionary::addVariableNotify(const char *name, const Con::NotifyDelegate &callback)
{
Entry *ent = lookup(StringTable->insert(name));
if (!ent)
return;
if (!ent->notify)
ent->notify = new Entry::NotifySignal();
ent->notify->notify(callback);
}
void Dictionary::removeVariableNotify(const char *name, const Con::NotifyDelegate &callback)
{
Entry *ent = lookup(StringTable->insert(name));
if (ent && ent->notify)
ent->notify->remove(callback);
}
void Dictionary::validate()
{
AssertFatal(ownHashTable.owner == this,
"Dictionary::validate() - Dictionary not owner of own hashtable!");
}
void ExprEvalState::pushFrame(StringTableEntry frameName, Namespace *ns, S32 registerCount)
{
#ifdef DEBUG_SPEW
validate();
Platform::outputDebugString("[ConsoleInternal] Pushing new frame for '%s' at %i",
frameName, mStackDepth);
#endif
if (mStackDepth + 1 > stack.size())
{
#ifdef DEBUG_SPEW
Platform::outputDebugString("[ConsoleInternal] Growing stack by one frame");
#endif
stack.push_back(new Dictionary);
}
Dictionary& newFrame = *(stack[mStackDepth]);
newFrame.setState(this);
newFrame.scopeName = frameName;
newFrame.scopeNamespace = ns;
mStackDepth++;
currentVariable = NULL;
AssertFatal(!newFrame.getCount(), "ExprEvalState::pushFrame - Dictionary not empty!");
ConsoleValue* consoleValArray = new ConsoleValue[registerCount];
localStack.push_back(ConsoleValueFrame(consoleValArray, false));
currentRegisterArray = &localStack.last();
AssertFatal(mStackDepth == localStack.size(), avar("Stack sizes do not match. mStackDepth = %d, localStack = %d", mStackDepth, localStack.size()));
#ifdef DEBUG_SPEW
validate();
#endif
}
void ExprEvalState::popFrame()
{
AssertFatal(mStackDepth > 0, "ExprEvalState::popFrame - Stack Underflow!");
#ifdef DEBUG_SPEW
validate();
Platform::outputDebugString("[ConsoleInternal] Popping %sframe at %i",
getCurrentFrame().isOwner() ? "" : "shared ", mStackDepth - 1);
#endif
mStackDepth--;
stack[mStackDepth]->reset();
currentVariable = NULL;
const ConsoleValueFrame& frame = localStack.last();
localStack.pop_back();
if (!frame.isReference)
delete[] frame.values;
currentRegisterArray = localStack.size() ? &localStack.last() : NULL;
AssertFatal(mStackDepth == localStack.size(), avar("Stack sizes do not match. mStackDepth = %d, localStack = %d", mStackDepth, localStack.size()));
#ifdef DEBUG_SPEW
validate();
#endif
}
void ExprEvalState::pushFrameRef(S32 stackIndex)
{
AssertFatal(stackIndex >= 0 && stackIndex < mStackDepth, "You must be asking for a valid frame!");
#ifdef DEBUG_SPEW
validate();
Platform::outputDebugString("[ConsoleInternal] Cloning frame from %i to %i",
stackIndex, mStackDepth);
#endif
if (mStackDepth + 1 > stack.size())
{
#ifdef DEBUG_SPEW
Platform::outputDebugString("[ConsoleInternal] Growing stack by one frame");
#endif
stack.push_back(new Dictionary);
}
Dictionary& newFrame = *(stack[mStackDepth]);
newFrame.setState(this, stack[stackIndex]);
mStackDepth++;
currentVariable = NULL;
ConsoleValue* values = localStack[stackIndex].values;
localStack.push_back(ConsoleValueFrame(values, true));
currentRegisterArray = &localStack.last();
AssertFatal(mStackDepth == localStack.size(), avar("Stack sizes do not match. mStackDepth = %d, localStack = %d", mStackDepth, localStack.size()));
#ifdef DEBUG_SPEW
validate();
#endif
}
ExprEvalState::ExprEvalState()
{
VECTOR_SET_ASSOCIATION(stack);
globalVars.setState(this);
thisObject = NULL;
traceOn = false;
currentVariable = NULL;
mStackDepth = 0;
stack.reserve(64);
mShouldReset = false;
mResetLocked = false;
copyVariable = NULL;
}
ExprEvalState::~ExprEvalState()
{
// Delete callframes.
while (!stack.empty())
{
delete stack.last();
stack.decrement();
}
}
void ExprEvalState::validate()
{
AssertFatal(mStackDepth <= stack.size(),
"ExprEvalState::validate() - Stack depth pointing beyond last stack frame!");
for (U32 i = 0; i < stack.size(); ++i)
stack[i]->validate();
}
DefineEngineFunction(backtrace, void, (), ,
"@brief Prints the scripting call stack to the console log.\n\n"
"Used to trace functions called from within functions. Can help discover what functions were called "
"(and not yet exited) before the current point in scripts.\n\n"
"@ingroup Debugging")
{
U32 totalSize = 1;
for (U32 i = 0; i < gEvalState.getStackDepth(); i++)
{
if (gEvalState.stack[i]->scopeNamespace && gEvalState.stack[i]->scopeNamespace->mEntryList->mPackage)
totalSize += dStrlen(gEvalState.stack[i]->scopeNamespace->mEntryList->mPackage) + 2;
if (gEvalState.stack[i]->scopeName)
totalSize += dStrlen(gEvalState.stack[i]->scopeName) + 3;
if (gEvalState.stack[i]->scopeNamespace && gEvalState.stack[i]->scopeNamespace->mName)
totalSize += dStrlen(gEvalState.stack[i]->scopeNamespace->mName) + 2;
}
char *buf = Con::getReturnBuffer(totalSize);
buf[0] = 0;
for (U32 i = 0; i < gEvalState.getStackDepth(); i++)
{
dStrcat(buf, "->", totalSize);
if (gEvalState.stack[i]->scopeNamespace && gEvalState.stack[i]->scopeNamespace->mEntryList->mPackage)
{
dStrcat(buf, "[", totalSize);
dStrcat(buf, gEvalState.stack[i]->scopeNamespace->mEntryList->mPackage, totalSize);
dStrcat(buf, "]", totalSize);
}
if (gEvalState.stack[i]->scopeNamespace && gEvalState.stack[i]->scopeNamespace->mName)
{
dStrcat(buf, gEvalState.stack[i]->scopeNamespace->mName, totalSize);
dStrcat(buf, "::", totalSize);
}
if (gEvalState.stack[i]->scopeName)
dStrcat(buf, gEvalState.stack[i]->scopeName, totalSize);
}
Con::printf("BackTrace: %s", buf);
}
Namespace::Entry::Entry()
{
mCode = NULL;
mType = InvalidFunctionType;
mUsage = NULL;
mHeader = NULL;
mNamespace = NULL;
cb.mStringCallbackFunc = NULL;
mFunctionLineNumber = 0;
mFunctionName = StringTable->EmptyString();
mFunctionOffset = 0;
mMinArgs = 0;
mMaxArgs = 0;
mNext = NULL;
mPackage = StringTable->EmptyString();
mToolOnly = false;
}
void Namespace::Entry::clear()
{
if (mCode)
{
mCode->decRefCount();
mCode = NULL;
}
// Clean up usage strings generated for script functions.
if ((mType == Namespace::Entry::ConsoleFunctionType) && mUsage)
{
dFree(mUsage);
mUsage = NULL;
}
}
Namespace::Namespace()
{
mPackage = NULL;
mUsage = NULL;
mCleanUpUsage = false;
mName = NULL;
mParent = NULL;
mNext = NULL;
mEntryList = NULL;
mHashSize = 0;
mHashTable = 0;
mHashSequence = 0;
mRefCountToParent = 0;
mClassRep = 0;
lastUsage = NULL;
}
Namespace::~Namespace()
{
clearEntries();
if (mUsage && mCleanUpUsage)
{
dFree(mUsage);
mUsage = NULL;
mCleanUpUsage = false;
}
}
void Namespace::clearEntries()
{
for (Entry *walk = mEntryList; walk; walk = walk->mNext)
walk->clear();
}
Namespace *Namespace::find(StringTableEntry name, StringTableEntry package)
{
if (name == NULL && package == NULL)
return mGlobalNamespace;
auto pair = std::make_pair(name, package);
auto pos = gNamespaceCache.find(pair);
if (pos != gNamespaceCache.end())
return pos->second;
Namespace *ret = (Namespace *)mAllocator.alloc(sizeof(Namespace));
constructInPlace(ret);
ret->mPackage = package;
ret->mName = name;
ret->mNext = mNamespaceList;
mNamespaceList = ret;
// insert into namespace cache.
gNamespaceCache[pair] = ret;
return ret;
}
bool Namespace::unlinkClass(Namespace *parent)
{
AssertFatal(mPackage == NULL, "Namespace::unlinkClass - Must not be called on a namespace coming from a package!");
// Skip additions to this namespace coming from packages.
Namespace* walk = getPackageRoot();
// Make sure "parent" is the direct parent namespace.
if (parent != NULL && walk->mParent && walk->mParent != parent)
{
Con::errorf(ConsoleLogEntry::General, "Namespace::unlinkClass - cannot unlink namespace parent linkage for %s for %s.",
walk->mName, walk->mParent->mName);
return false;
}
// Decrease the reference count. Note that we do this on
// the bottom-most namespace, i.e. the one guaranteed not
// to come from a package.
mRefCountToParent--;
AssertFatal(mRefCountToParent >= 0, "Namespace::unlinkClass - reference count to parent is less than 0");
// Unlink if the count dropped to zero.
if (mRefCountToParent == 0)
{
walk->mParent = NULL;
trashCache();
}
return true;
}
bool Namespace::classLinkTo(Namespace *parent)
{
Namespace* walk = getPackageRoot();
if (walk->mParent && walk->mParent != parent)
{
Con::errorf(ConsoleLogEntry::General, "Error: cannot change namespace parent linkage of %s from %s to %s.",
walk->mName, walk->mParent->mName, parent->mName);
return false;
}
trashCache();
walk->mParent = parent;
mRefCountToParent++;
return true;
}
void Namespace::buildHashTable()
{
if (mHashSequence == mCacheSequence)
return;
if (!mEntryList && mParent)
{
mParent->buildHashTable();
mHashTable = mParent->mHashTable;
mHashSize = mParent->mHashSize;
mHashSequence = mCacheSequence;
return;
}
U32 entryCount = 0;
Namespace * ns;
for (ns = this; ns; ns = ns->mParent)
for (Entry *walk = ns->mEntryList; walk; walk = walk->mNext)
if (lookupRecursive(walk->mFunctionName) == walk)
entryCount++;
mHashSize = entryCount + (entryCount >> 1) + 1;
if (!(mHashSize & 1))
mHashSize++;
mHashTable = (Entry **)mCacheAllocator.alloc(sizeof(Entry *) * mHashSize);
for (U32 i = 0; i < mHashSize; i++)
mHashTable[i] = NULL;
for (ns = this; ns; ns = ns->mParent)
{
for (Entry *walk = ns->mEntryList; walk; walk = walk->mNext)
{
U32 index = HashPointer(walk->mFunctionName) % mHashSize;
while (mHashTable[index] && mHashTable[index]->mFunctionName != walk->mFunctionName)
{
index++;
if (index >= mHashSize)
index = 0;
}
if (!mHashTable[index])
mHashTable[index] = walk;
}
}
mHashSequence = mCacheSequence;
}
void Namespace::getUniqueEntryLists(Namespace *other, VectorPtr<Entry *> *outThisList, VectorPtr<Entry *> *outOtherList)
{
// All namespace entries in the common ACR should be
// ignored when checking for duplicate entry names.
static VectorPtr<Namespace::Entry *> commonEntries;
commonEntries.clear();
AbstractClassRep *commonACR = mClassRep->getCommonParent(other->mClassRep);
commonACR->getNameSpace()->getEntryList(&commonEntries);
// Make life easier
VectorPtr<Namespace::Entry *> &thisEntries = *outThisList;
VectorPtr<Namespace::Entry *> &compEntries = *outOtherList;
// Clear, just in case they aren't
thisEntries.clear();
compEntries.clear();
getEntryList(&thisEntries);
other->getEntryList(&compEntries);
// Run through all of the entries in the common ACR, and remove them from
// the other two entry lists
for (NamespaceEntryListIterator itr = commonEntries.begin(); itr != commonEntries.end(); itr++)
{
// Check this entry list
for (NamespaceEntryListIterator thisItr = thisEntries.begin(); thisItr != thisEntries.end(); thisItr++)
{
if (*thisItr == *itr)
{
thisEntries.erase(thisItr);
break;
}
}
// Same check for component entry list
for (NamespaceEntryListIterator compItr = compEntries.begin(); compItr != compEntries.end(); compItr++)
{
if (*compItr == *itr)
{
compEntries.erase(compItr);
break;
}
}
}
}
void Namespace::init()
{
// create the global namespace
mGlobalNamespace = (Namespace *)mAllocator.alloc(sizeof(Namespace));
constructInPlace(mGlobalNamespace);
mGlobalNamespace->mPackage = NULL;
mGlobalNamespace->mName = NULL;
mGlobalNamespace->mNext = NULL;
mNamespaceList = mGlobalNamespace;
// Insert into namespace cache.
gNamespaceCache[std::make_pair(mGlobalNamespace->mName, mGlobalNamespace->mPackage)] = mGlobalNamespace;
}
Namespace *Namespace::global()
{
return mGlobalNamespace;
}
void Namespace::shutdown()
{
// The data chunker will release all memory in one go
// without calling destructors, so we do this manually here.
for (Namespace *walk = mNamespaceList; walk; walk = walk->mNext)
walk->~Namespace();
}
void Namespace::trashCache()
{
mCacheSequence++;
mCacheAllocator.freeBlocks();
}
const char *Namespace::tabComplete(const char *prevText, S32 baseLen, bool fForward)
{
if (mHashSequence != mCacheSequence)
buildHashTable();
const char *bestMatch = NULL;
for (U32 i = 0; i < mHashSize; i++)
if (mHashTable[i] && canTabComplete(prevText, bestMatch, mHashTable[i]->mFunctionName, baseLen, fForward))
bestMatch = mHashTable[i]->mFunctionName;
return bestMatch;
}
Namespace::Entry *Namespace::lookupRecursive(StringTableEntry name)
{
for (Namespace *ns = this; ns; ns = ns->mParent)
for (Entry *walk = ns->mEntryList; walk; walk = walk->mNext)
if (walk->mFunctionName == name)
return walk;
return NULL;
}
Namespace::Entry *Namespace::lookup(StringTableEntry name)
{
if (mHashSequence != mCacheSequence)
buildHashTable();
U32 index = HashPointer(name) % mHashSize;
while (mHashTable[index] && mHashTable[index]->mFunctionName != name)
{
index++;
if (index >= mHashSize)
index = 0;
}
return mHashTable[index];
}
static S32 QSORT_CALLBACK compareEntries(const void* a, const void* b)
{
const Namespace::Entry* fa = *((Namespace::Entry**)a);
const Namespace::Entry* fb = *((Namespace::Entry**)b);
return dStricmp(fa->mFunctionName, fb->mFunctionName);
}
void Namespace::getEntryList(VectorPtr<Entry *> *vec)
{
if (mHashSequence != mCacheSequence)
buildHashTable();
for (U32 i = 0; i < mHashSize; i++)
if (mHashTable[i])
vec->push_back(mHashTable[i]);
dQsort(vec->address(), vec->size(), sizeof(Namespace::Entry *), compareEntries);
}
Namespace::Entry *Namespace::createLocalEntry(StringTableEntry name)
{
for (Entry *walk = mEntryList; walk; walk = walk->mNext)
{
if (walk->mFunctionName == name)
{
walk->clear();
return walk;
}
}
Entry *ent = (Entry *)mAllocator.alloc(sizeof(Entry));
constructInPlace(ent);
ent->mNamespace = this;
ent->mFunctionName = name;
ent->mNext = mEntryList;
ent->mPackage = mPackage;
ent->mToolOnly = false;
mEntryList = ent;
return ent;
}
void Namespace::addFunction(StringTableEntry name, CodeBlock *cb, U32 functionOffset, const char* usage, U32 lineNumber)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mCode = cb;
ent->mFunctionOffset = functionOffset;
ent->mCode->incRefCount();
ent->mType = Entry::ConsoleFunctionType;
ent->mFunctionLineNumber = lineNumber;
}
void Namespace::addCommand(StringTableEntry name, StringCallback cb, const char *usage, S32 minArgs, S32 maxArgs, bool isToolOnly, ConsoleFunctionHeader* header)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = minArgs;
ent->mMaxArgs = maxArgs;
ent->mToolOnly = isToolOnly;
ent->mType = Entry::StringCallbackType;
ent->cb.mStringCallbackFunc = cb;
}
void Namespace::addCommand(StringTableEntry name, IntCallback cb, const char *usage, S32 minArgs, S32 maxArgs, bool isToolOnly, ConsoleFunctionHeader* header)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = minArgs;
ent->mMaxArgs = maxArgs;
ent->mToolOnly = isToolOnly;
ent->mType = Entry::IntCallbackType;
ent->cb.mIntCallbackFunc = cb;
}
void Namespace::addCommand(StringTableEntry name, VoidCallback cb, const char *usage, S32 minArgs, S32 maxArgs, bool isToolOnly, ConsoleFunctionHeader* header)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = minArgs;
ent->mMaxArgs = maxArgs;
ent->mToolOnly = isToolOnly;
ent->mType = Entry::VoidCallbackType;
ent->cb.mVoidCallbackFunc = cb;
}
void Namespace::addCommand(StringTableEntry name, FloatCallback cb, const char *usage, S32 minArgs, S32 maxArgs, bool isToolOnly, ConsoleFunctionHeader* header)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = minArgs;
ent->mMaxArgs = maxArgs;
ent->mToolOnly = isToolOnly;
ent->mType = Entry::FloatCallbackType;
ent->cb.mFloatCallbackFunc = cb;
}
void Namespace::addCommand(StringTableEntry name, BoolCallback cb, const char *usage, S32 minArgs, S32 maxArgs, bool isToolOnly, ConsoleFunctionHeader* header)
{
Entry *ent = createLocalEntry(name);
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = minArgs;
ent->mMaxArgs = maxArgs;
ent->mToolOnly = isToolOnly;
ent->mType = Entry::BoolCallbackType;
ent->cb.mBoolCallbackFunc = cb;
}
void Namespace::addScriptCallback(const char *funcName, const char *usage, ConsoleFunctionHeader* header)
{
static U32 uid = 0;
char buffer[1024];
char lilBuffer[32];
dStrcpy(buffer, funcName, 1024);
dSprintf(lilBuffer, 32, "_%d_cb", uid++);
dStrcat(buffer, lilBuffer, 1024);
Entry *ent = createLocalEntry(StringTable->insert(buffer));
trashCache();
ent->mUsage = usage;
ent->mHeader = header;
ent->mMinArgs = -2;
ent->mMaxArgs = -3;
ent->mType = Entry::ScriptCallbackType;
ent->cb.mCallbackName = funcName;
}
void Namespace::markGroup(const char* name, const char* usage)
{
static U32 uid = 0;
char buffer[1024];
char lilBuffer[32];
dStrcpy(buffer, name, 1024);
dSprintf(lilBuffer, 32, "_%d", uid++);
dStrcat(buffer, lilBuffer, 1024);
Entry *ent = createLocalEntry(StringTable->insert(buffer));
trashCache();
if (usage != NULL)
lastUsage = (char*)(ent->mUsage = usage);
else
ent->mUsage = lastUsage;
ent->mMinArgs = -1; // Make sure it explodes if somehow we run this entry.
ent->mMaxArgs = -2;
ent->mType = Entry::GroupMarker;
ent->cb.mGroupName = name;
}
extern S32 executeBlock(StmtNode *block, ExprEvalState *state);
ConsoleValue Namespace::Entry::execute(S32 argc, ConsoleValue *argv, ExprEvalState *state)
{
STR.clearFunctionOffset();
if (mType == ConsoleFunctionType)
{
if (mFunctionOffset)
{
return std::move(mCode->exec(mFunctionOffset, argv[0].getString(), mNamespace, argc, argv, false, mPackage));
}
else
{
return std::move(ConsoleValue());
}
}
#ifndef TORQUE_DEBUG
// [tom, 12/13/2006] This stops tools functions from working in the console,
// which is useful behavior when debugging so I'm ifdefing this out for debug builds.
if (mToolOnly && !Con::isCurrentScriptToolScript())
{
Con::errorf(ConsoleLogEntry::Script, "%s::%s - attempting to call tools only function from outside of tools", mNamespace->mName, mFunctionName);
return std::move(ConsoleValue());
}
#endif
if ((mMinArgs && argc < mMinArgs) || (mMaxArgs && argc > mMaxArgs))
{
Con::warnf(ConsoleLogEntry::Script, "%s::%s - wrong number of arguments.", mNamespace->mName, mFunctionName);
Con::warnf(ConsoleLogEntry::Script, "usage: %s", mUsage);
return std::move(ConsoleValue());
}
ConsoleValue result;
switch (mType)
{
case StringCallbackType:
{
const char* str = cb.mStringCallbackFunc(state->thisObject, argc, argv);
result.setString(str);
break;
}
case IntCallbackType:
result.setInt(cb.mIntCallbackFunc(state->thisObject, argc, argv));
break;
case FloatCallbackType:
result.setFloat(cb.mBoolCallbackFunc(state->thisObject, argc, argv));
break;
case VoidCallbackType:
cb.mVoidCallbackFunc(state->thisObject, argc, argv);
break;
case BoolCallbackType:
result.setBool(cb.mBoolCallbackFunc(state->thisObject, argc, argv));
break;
}
return std::move(result);
}
//-----------------------------------------------------------------------------
// Doc string code.
namespace {
/// Scan the given usage string for an argument list description. With the
/// old console macros, these were usually included as the first part of the
/// usage string.
bool sFindArgumentListSubstring(const char* usage, const char*& start, const char*& end)
{
if (!usage)
return false;
const char* ptr = usage;
while (*ptr && *ptr != '(' && *ptr != '\n') // Only scan first line of usage string.
{
// Stop on the first alphanumeric character as we expect
// argument lists to precede descriptions.
if (dIsalnum(*ptr))
return false;
ptr++;
}
if (*ptr != '(')
return false;
start = ptr;
ptr++;
bool inString = false;
U32 nestingCount = 0;
while (*ptr && (*ptr != ')' || nestingCount > 0 || inString))
{
if (*ptr == '(')
nestingCount++;
else if (*ptr == ')')
nestingCount--;
else if (*ptr == '"')
inString = !inString;
else if (*ptr == '\\' && ptr[1] == '"')
ptr++;
ptr++;
}
if (*ptr)
ptr++;
end = ptr;
return true;
}
///
void sParseList(const char* str, Vector< String >& outList)
{
// Skip the initial '( '.
const char* ptr = str;
while (*ptr && dIsspace(*ptr))
ptr++;
if (*ptr == '(')
{
ptr++;
while (*ptr && dIsspace(*ptr))
ptr++;
}
// Parse out list items.
while (*ptr && *ptr != ')')
{
// Find end of element.
const char* start = ptr;
bool inString = false;
U32 nestingCount = 0;
while (*ptr && ((*ptr != ')' && *ptr != ',') || nestingCount > 0 || inString))
{
if (*ptr == '(')
nestingCount++;
else if (*ptr == ')')
nestingCount--;
else if (*ptr == '"')
inString = !inString;
else if (*ptr == '\\' && ptr[1] == '"')
ptr++;
ptr++;
}
// Backtrack to remove trailing whitespace.
const char* end = ptr;
if (*end == ',' || *end == ')')
end--;
while (end > start && dIsspace(*end))
end--;
if (*end)
end++;
// Add to list.
if (start != end)
outList.push_back(String(start, end - start));
// Skip comma and whitespace.
if (*ptr == ',')
ptr++;
while (*ptr && dIsspace(*ptr))
ptr++;
}
}
///
void sGetArgNameAndType(const String& str, String& outType, String& outName)
{
if (!str.length())
{
outType = String::EmptyString;
outName = String::EmptyString;
return;
}
// Find first non-ID character from right.
S32 index = str.length() - 1;
while (index >= 0 && (dIsalnum(str[index]) || str[index] == '_'))
index--;
const U32 nameStartIndex = index + 1;
// Find end of type name by skipping rightmost whitespace inwards.
while (index >= 0 && dIsspace(str[index]))
index--;
//
outName = String(&((const char*)str)[nameStartIndex]);
outType = String(str, index + 1);
}
/// Return the type name to show in documentation for the given C++ type.
const char* sGetDocTypeString(const char* nativeType)
{
if (dStrncmp(nativeType, "const ", 6) == 0)
nativeType += 6;
if (String::compare(nativeType, "char*") == 0 || String::compare(nativeType, "char *") == 0)
return "string";
else if (String::compare(nativeType, "S32") == 0)
return "int";
else if (String::compare(nativeType, "U32") == 0)
return "uint";
else if (String::compare(nativeType, "F32") == 0)
return "float";
const U32 length = dStrlen(nativeType);
if (nativeType[length - 1] == '&' || nativeType[length - 1] == '*')
return StringTable->insertn(nativeType, length - 1);
return nativeType;
}
}
String Namespace::Entry::getBriefDescription(String* outRemainingDocText) const
{
String docString = getDocString();
S32 newline = docString.find('\n');
if (newline == -1)
{
if (outRemainingDocText)
*outRemainingDocText = String();
return docString;
}
String brief = docString.substr(0, newline);
if (outRemainingDocText)
*outRemainingDocText = docString.substr(newline + 1);
return brief;
}
String Namespace::Entry::getDocString() const
{
const char* argListStart;
const char* argListEnd;
if (sFindArgumentListSubstring(mUsage, argListStart, argListEnd))
{
// Skip the " - " part present in some old doc strings.
const char* ptr = argListEnd;
while (*ptr && dIsspace(*ptr))
ptr++;
if (*ptr == '-')
{
ptr++;
while (*ptr && dIsspace(*ptr))
ptr++;
}
return ptr;
}
return mUsage;
}
String Namespace::Entry::getArgumentsString() const
{
StringBuilder str;
if (mHeader)
{
// Parse out the argument list string supplied with the extended
// function header and add default arguments as we go.
Vector< String > argList;
Vector< String > defaultArgList;
sParseList(mHeader->mArgString, argList);
sParseList(mHeader->mDefaultArgString, defaultArgList);
str.append('(');
const U32 numArgs = argList.size();
const U32 numDefaultArgs = defaultArgList.size();
const U32 firstDefaultArgIndex = numArgs - numDefaultArgs;
for (U32 i = 0; i < numArgs; ++i)
{
// Add separator if not first arg.
if (i > 0)
str.append(',');
// Add type and name.
String name;
String type;
sGetArgNameAndType(argList[i], type, name);
str.append(' ');
str.append(sGetDocTypeString(type));
str.append(' ');
str.append(name);
// Add default value, if any.
if (i >= firstDefaultArgIndex)
{
str.append('=');
str.append(defaultArgList[i - firstDefaultArgIndex]);
}
}
if (numArgs > 0)
str.append(' ');
str.append(')');
}
else
{
// No extended function header. Try to parse out the argument
// list from the usage string.
const char* argListStart;
const char* argListEnd;
if (sFindArgumentListSubstring(mUsage, argListStart, argListEnd))
str.append(argListStart, argListEnd - argListStart);
else if (mType == ConsoleFunctionType && mCode)
{
// This isn't correct but the nonsense console stuff is set up such that all
// functions that have no function bodies are keyed to offset 0 to indicate "no code."
// This loses the association with the original function definition so we can't really
// tell here what the actual prototype is except if we searched though the entire opcode
// stream for the corresponding OP_FUNC_DECL (which would require dealing with the
// variable-size instructions).
if (!mFunctionOffset)
return "()";
String args = mCode->getFunctionArgs(mFunctionOffset);
if (args.isEmpty())
return "()";
str.append("( ");
str.append(args);
str.append(" )");
}
}
return str.end();
}
String Namespace::Entry::getPrototypeString() const
{
StringBuilder str;
// Start with return type.
if (mHeader && mHeader->mReturnString)
{
str.append(sGetDocTypeString(mHeader->mReturnString));
str.append(' ');
}
else
switch (mType)
{
case StringCallbackType:
str.append("string ");
break;
case IntCallbackType:
str.append("int ");
break;
case FloatCallbackType:
str.append("float ");
break;
case VoidCallbackType:
str.append("void ");
break;
case BoolCallbackType:
str.append("bool ");
break;
case ScriptCallbackType:
break;
}
// Add function name and arguments.
if (mType == ScriptCallbackType)
str.append(cb.mCallbackName);
else
str.append(mFunctionName);
str.append(getArgumentsString());
return str.end();
}
//-----------------------------------------------------------------------------
StringTableEntry Namespace::mActivePackages[Namespace::MaxActivePackages];
U32 Namespace::mNumActivePackages = 0;
U32 Namespace::mOldNumActivePackages = 0;
bool Namespace::isPackage(StringTableEntry name)
{
for (Namespace *walk = mNamespaceList; walk; walk = walk->mNext)
if (walk->mPackage == name)
return true;
return false;
}
U32 Namespace::getActivePackagesCount()
{
return mNumActivePackages;
}
StringTableEntry Namespace::getActivePackage(U32 index)
{
if (index >= mNumActivePackages)
return StringTable->EmptyString();
return mActivePackages[index];
}
void Namespace::activatePackage(StringTableEntry name)
{
if (mNumActivePackages == MaxActivePackages)
{
Con::printf("ActivatePackage(%s) failed - Max package limit reached: %d", name, MaxActivePackages);
return;
}
if (!name)
return;
// see if this one's already active
for (U32 i = 0; i < mNumActivePackages; i++)
if (mActivePackages[i] == name)
return;
// kill the cache
trashCache();
// find all the package namespaces...
for (Namespace *walk = mNamespaceList; walk; walk = walk->mNext)
{
if (walk->mPackage == name)
{
Namespace *parent = Namespace::find(walk->mName);
// hook the parent
walk->mParent = parent->mParent;
parent->mParent = walk;
// now swap the entries:
Entry *ew;
for (ew = parent->mEntryList; ew; ew = ew->mNext)
ew->mNamespace = walk;
for (ew = walk->mEntryList; ew; ew = ew->mNext)
ew->mNamespace = parent;
ew = walk->mEntryList;
walk->mEntryList = parent->mEntryList;
parent->mEntryList = ew;
}
}
mActivePackages[mNumActivePackages++] = name;
}
void Namespace::deactivatePackage(StringTableEntry name)
{
U32 oldNumActivePackages = mNumActivePackages;
// Remove all packages down to the given one
deactivatePackageStack(name);
// Now add back all packages that followed the given one
if (!oldNumActivePackages)
return;
for (U32 i = mNumActivePackages + 1; i < oldNumActivePackages; i++)
activatePackage(mActivePackages[i]);
}
void Namespace::deactivatePackageStack(StringTableEntry name)
{
S32 i, j;
for (i = 0; i < mNumActivePackages; i++)
if (mActivePackages[i] == name)
break;
if (i == mNumActivePackages)
return;
trashCache();
// Remove all packages down to the given one
for (j = mNumActivePackages - 1; j >= i; j--)
{
// gotta unlink em in reverse order...
for (Namespace *walk = mNamespaceList; walk; walk = walk->mNext)
{
if (walk->mPackage == mActivePackages[j])
{
Namespace *parent = Namespace::find(walk->mName);
// hook the parent
parent->mParent = walk->mParent;
walk->mParent = NULL;
// now swap the entries:
Entry *ew;
for (ew = parent->mEntryList; ew; ew = ew->mNext)
ew->mNamespace = walk;
for (ew = walk->mEntryList; ew; ew = ew->mNext)
ew->mNamespace = parent;
ew = walk->mEntryList;
walk->mEntryList = parent->mEntryList;
parent->mEntryList = ew;
}
}
}
mNumActivePackages = i;
}
void Namespace::unlinkPackages()
{
mOldNumActivePackages = mNumActivePackages;
if (!mNumActivePackages)
return;
deactivatePackageStack(mActivePackages[0]);
}
void Namespace::relinkPackages()
{
if (!mOldNumActivePackages)
return;
for (U32 i = 0; i < mOldNumActivePackages; i++)
activatePackage(mActivePackages[i]);
}
DefineEngineFunction(isPackage, bool, (String identifier), ,
"@brief Returns true if the identifier is the name of a declared package.\n\n"
"@ingroup Packages\n")
{
StringTableEntry name = StringTable->insert(identifier.c_str());
return Namespace::isPackage(name);
}
DefineEngineFunction(activatePackage, void, (String packageName), ,
"@brief Activates an existing package.\n\n"
"The activation occurs by updating the namespace linkage of existing functions and methods. "
"If the package is already activated the function does nothing.\n"
"@ingroup Packages\n")
{
StringTableEntry name = StringTable->insert(packageName.c_str());
Namespace::activatePackage(name);
}
DefineEngineFunction(deactivatePackage, void, (String packageName), ,
"@brief Deactivates a previously activated package.\n\n"
"The package is deactivated by removing its namespace linkages to any function or method. "
"If there are any packages above this one in the stack they are deactivated as well. "
"If the package is not on the stack this function does nothing.\n"
"@ingroup Packages\n")
{
StringTableEntry name = StringTable->insert(packageName.c_str());
Namespace::deactivatePackage(name);
}
DefineEngineFunction(getPackageList, const char*, (), ,
"@brief Returns a space delimited list of the active packages in stack order.\n\n"
"@ingroup Packages\n")
{
if (Namespace::getActivePackagesCount() == 0)
return "";
// Determine size of return buffer
dsize_t buffersize = 0;
for (U32 i = 0; i < Namespace::getActivePackagesCount(); ++i)
{
buffersize += dStrlen(Namespace::getActivePackage(i)) + 1;
}
U32 maxBufferSize = buffersize + 1;
char* returnBuffer = Con::getReturnBuffer(maxBufferSize);
U32 returnLen = 0;
for (U32 i = 0; i < Namespace::getActivePackagesCount(); ++i)
{
dSprintf(returnBuffer + returnLen, maxBufferSize - returnLen, "%s ", Namespace::getActivePackage(i));
returnLen = dStrlen(returnBuffer);
}
// Trim off the last extra space
if (returnLen > 0 && returnBuffer[returnLen - 1] == ' ')
returnBuffer[returnLen - 1] = '\0';
return returnBuffer;
}