/// MacroArgs ctor function - This destroys the vector passed in.
MacroArgs *MacroArgs::create(const MacroInfo *MI,
ArrayRef<Token> UnexpArgTokens,
bool VarargsElided, Preprocessor &PP) {
assert(MI->isFunctionLike() &&
"Can't have args for an object-like macro!");
MacroArgs **ResultEnt = nullptr;
unsigned ClosestMatch = ~0U;
// See if we have an entry with a big enough argument list to reuse on the
// free list. If so, reuse it.
for (MacroArgs **Entry = &PP.MacroArgCache; *Entry;
Entry = &(*Entry)->ArgCache)
if ((*Entry)->NumUnexpArgTokens >= UnexpArgTokens.size() &&
(*Entry)->NumUnexpArgTokens < ClosestMatch) {
ResultEnt = Entry;
// If we have an exact match, use it.
if ((*Entry)->NumUnexpArgTokens == UnexpArgTokens.size())
break;
// Otherwise, use the best fit.
ClosestMatch = (*Entry)->NumUnexpArgTokens;
}
MacroArgs *Result;
if (!ResultEnt) {
// Allocate memory for a MacroArgs object with the lexer tokens at the end.
Result = (MacroArgs *)malloc(sizeof(MacroArgs) +
UnexpArgTokens.size() * sizeof(Token));
// Construct the MacroArgs object.
new (Result)
MacroArgs(UnexpArgTokens.size(), VarargsElided, MI->getNumParams());
} else {
Result = *ResultEnt;
// Unlink this node from the preprocessors singly linked list.
*ResultEnt = Result->ArgCache;
Result->NumUnexpArgTokens = UnexpArgTokens.size();
Result->VarargsElided = VarargsElided;
Result->NumMacroArgs = MI->getNumParams();
}
// Copy the actual unexpanded tokens to immediately after the result ptr.
if (!UnexpArgTokens.empty())
std::copy(UnexpArgTokens.begin(), UnexpArgTokens.end(),
const_cast<Token*>(Result->getUnexpArgument(0)));
return Result;
}
/// MacroArgs ctor function - This destroys the vector passed in.
MacroArgs *MacroArgs::create(const MacroInfo *MI,
const Token *UnexpArgTokens,
unsigned NumToks, bool VarargsElided) {
assert(MI->isFunctionLike() &&
"Can't have args for an object-like macro!");
// Allocate memory for the MacroArgs object with the lexer tokens at the end.
MacroArgs *Result = (MacroArgs*)malloc(sizeof(MacroArgs) +
NumToks*sizeof(Token));
// Construct the macroargs object.
new (Result) MacroArgs(NumToks, VarargsElided);
// Copy the actual unexpanded tokens to immediately after the result ptr.
if (NumToks)
memcpy(const_cast<Token*>(Result->getUnexpArgument(0)),
UnexpArgTokens, NumToks*sizeof(Token));
return Result;
}
