This commit is contained in:
lat9nq 2023-07-18 21:39:37 -04:00
parent c1e57ad358
commit 1ab3bd5a5e
8 changed files with 2304 additions and 2193 deletions

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@ -20,9 +20,7 @@
#include <cstdlib>
#include <cstring>
#include <functional>
#include <numeric>
#include <utility>
#include <vector>
using namespace llvm;
using namespace llvm::itanium_demangle;
@ -81,8 +79,8 @@ struct DumpVisitor {
}
void printStr(const char *S) { fprintf(stderr, "%s", S); }
void print(StringView SV) {
fprintf(stderr, "\"%.*s\"", (int)SV.size(), SV.begin());
void print(std::string_view SV) {
fprintf(stderr, "\"%.*s\"", (int)SV.size(), SV.data());
}
void print(const Node *N) {
if (N)
@ -90,14 +88,6 @@ struct DumpVisitor {
else
printStr("<null>");
}
void print(NodeOrString NS) {
if (NS.isNode())
print(NS.asNode());
else if (NS.isString())
print(NS.asString());
else
printStr("NodeOrString()");
}
void print(NodeArray A) {
++Depth;
printStr("{");
@ -116,13 +106,11 @@ struct DumpVisitor {
// Overload used when T is exactly 'bool', not merely convertible to 'bool'.
void print(bool B) { printStr(B ? "true" : "false"); }
template <class T>
typename std::enable_if<std::is_unsigned<T>::value>::type print(T N) {
template <class T> std::enable_if_t<std::is_unsigned<T>::value> print(T N) {
fprintf(stderr, "%llu", (unsigned long long)N);
}
template <class T>
typename std::enable_if<std::is_signed<T>::value>::type print(T N) {
template <class T> std::enable_if_t<std::is_signed<T>::value> print(T N) {
fprintf(stderr, "%lld", (long long)N);
}
@ -185,6 +173,50 @@ struct DumpVisitor {
return printStr("TemplateParamKind::Template");
}
}
void print(Node::Prec P) {
switch (P) {
case Node::Prec::Primary:
return printStr("Node::Prec::Primary");
case Node::Prec::Postfix:
return printStr("Node::Prec::Postfix");
case Node::Prec::Unary:
return printStr("Node::Prec::Unary");
case Node::Prec::Cast:
return printStr("Node::Prec::Cast");
case Node::Prec::PtrMem:
return printStr("Node::Prec::PtrMem");
case Node::Prec::Multiplicative:
return printStr("Node::Prec::Multiplicative");
case Node::Prec::Additive:
return printStr("Node::Prec::Additive");
case Node::Prec::Shift:
return printStr("Node::Prec::Shift");
case Node::Prec::Spaceship:
return printStr("Node::Prec::Spaceship");
case Node::Prec::Relational:
return printStr("Node::Prec::Relational");
case Node::Prec::Equality:
return printStr("Node::Prec::Equality");
case Node::Prec::And:
return printStr("Node::Prec::And");
case Node::Prec::Xor:
return printStr("Node::Prec::Xor");
case Node::Prec::Ior:
return printStr("Node::Prec::Ior");
case Node::Prec::AndIf:
return printStr("Node::Prec::AndIf");
case Node::Prec::OrIf:
return printStr("Node::Prec::OrIf");
case Node::Prec::Conditional:
return printStr("Node::Prec::Conditional");
case Node::Prec::Assign:
return printStr("Node::Prec::Assign");
case Node::Prec::Comma:
return printStr("Node::Prec::Comma");
case Node::Prec::Default:
return printStr("Node::Prec::Default");
}
}
void newLine() {
printStr("\n");
@ -334,36 +366,21 @@ public:
using Demangler = itanium_demangle::ManglingParser<DefaultAllocator>;
char *llvm::itaniumDemangle(const char *MangledName, char *Buf,
size_t *N, int *Status) {
if (MangledName == nullptr || (Buf != nullptr && N == nullptr)) {
if (Status)
*Status = demangle_invalid_args;
char *llvm::itaniumDemangle(std::string_view MangledName) {
if (MangledName.empty())
return nullptr;
}
int InternalStatus = demangle_success;
Demangler Parser(MangledName, MangledName + std::strlen(MangledName));
OutputStream S;
Demangler Parser(MangledName.data(),
MangledName.data() + MangledName.length());
Node *AST = Parser.parse();
if (!AST)
return nullptr;
if (AST == nullptr)
InternalStatus = demangle_invalid_mangled_name;
else if (!initializeOutputStream(Buf, N, S, 1024))
InternalStatus = demangle_memory_alloc_failure;
else {
OutputBuffer OB;
assert(Parser.ForwardTemplateRefs.empty());
AST->print(S);
S += '\0';
if (N != nullptr)
*N = S.getCurrentPosition();
Buf = S.getBuffer();
}
if (Status)
*Status = InternalStatus;
return InternalStatus == demangle_success ? Buf : nullptr;
AST->print(OB);
OB += '\0';
return OB.getBuffer();
}
ItaniumPartialDemangler::ItaniumPartialDemangler()
@ -396,14 +413,12 @@ bool ItaniumPartialDemangler::partialDemangle(const char *MangledName) {
}
static char *printNode(const Node *RootNode, char *Buf, size_t *N) {
OutputStream S;
if (!initializeOutputStream(Buf, N, S, 128))
return nullptr;
RootNode->print(S);
S += '\0';
OutputBuffer OB(Buf, N);
RootNode->print(OB);
OB += '\0';
if (N != nullptr)
*N = S.getCurrentPosition();
return S.getBuffer();
*N = OB.getCurrentPosition();
return OB.getBuffer();
}
char *ItaniumPartialDemangler::getFunctionBaseName(char *Buf, size_t *N) const {
@ -417,8 +432,8 @@ char *ItaniumPartialDemangler::getFunctionBaseName(char *Buf, size_t *N) const {
case Node::KAbiTagAttr:
Name = static_cast<const AbiTagAttr *>(Name)->Base;
continue;
case Node::KStdQualifiedName:
Name = static_cast<const StdQualifiedName *>(Name)->Child;
case Node::KModuleEntity:
Name = static_cast<const ModuleEntity *>(Name)->Name;
continue;
case Node::KNestedName:
Name = static_cast<const NestedName *>(Name)->Name;
@ -441,9 +456,7 @@ char *ItaniumPartialDemangler::getFunctionDeclContextName(char *Buf,
return nullptr;
const Node *Name = static_cast<const FunctionEncoding *>(RootNode)->getName();
OutputStream S;
if (!initializeOutputStream(Buf, N, S, 128))
return nullptr;
OutputBuffer OB(Buf, N);
KeepGoingLocalFunction:
while (true) {
@ -458,27 +471,27 @@ char *ItaniumPartialDemangler::getFunctionDeclContextName(char *Buf,
break;
}
if (Name->getKind() == Node::KModuleEntity)
Name = static_cast<const ModuleEntity *>(Name)->Name;
switch (Name->getKind()) {
case Node::KStdQualifiedName:
S += "std";
break;
case Node::KNestedName:
static_cast<const NestedName *>(Name)->Qual->print(S);
static_cast<const NestedName *>(Name)->Qual->print(OB);
break;
case Node::KLocalName: {
auto *LN = static_cast<const LocalName *>(Name);
LN->Encoding->print(S);
S += "::";
LN->Encoding->print(OB);
OB += "::";
Name = LN->Entity;
goto KeepGoingLocalFunction;
}
default:
break;
}
S += '\0';
OB += '\0';
if (N != nullptr)
*N = S.getCurrentPosition();
return S.getBuffer();
*N = OB.getCurrentPosition();
return OB.getBuffer();
}
char *ItaniumPartialDemangler::getFunctionName(char *Buf, size_t *N) const {
@ -494,17 +507,15 @@ char *ItaniumPartialDemangler::getFunctionParameters(char *Buf,
return nullptr;
NodeArray Params = static_cast<FunctionEncoding *>(RootNode)->getParams();
OutputStream S;
if (!initializeOutputStream(Buf, N, S, 128))
return nullptr;
OutputBuffer OB(Buf, N);
S += '(';
Params.printWithComma(S);
S += ')';
S += '\0';
OB += '(';
Params.printWithComma(OB);
OB += ')';
OB += '\0';
if (N != nullptr)
*N = S.getCurrentPosition();
return S.getBuffer();
*N = OB.getCurrentPosition();
return OB.getBuffer();
}
char *ItaniumPartialDemangler::getFunctionReturnType(
@ -512,18 +523,16 @@ char *ItaniumPartialDemangler::getFunctionReturnType(
if (!isFunction())
return nullptr;
OutputStream S;
if (!initializeOutputStream(Buf, N, S, 128))
return nullptr;
OutputBuffer OB(Buf, N);
if (const Node *Ret =
static_cast<const FunctionEncoding *>(RootNode)->getReturnType())
Ret->print(S);
Ret->print(OB);
S += '\0';
OB += '\0';
if (N != nullptr)
*N = S.getCurrentPosition();
return S.getBuffer();
*N = OB.getCurrentPosition();
return OB.getBuffer();
}
char *ItaniumPartialDemangler::finishDemangle(char *Buf, size_t *N) const {
@ -563,8 +572,8 @@ bool ItaniumPartialDemangler::isCtorOrDtor() const {
case Node::KNestedName:
N = static_cast<const NestedName *>(N)->Name;
break;
case Node::KStdQualifiedName:
N = static_cast<const StdQualifiedName *>(N)->Child;
case Node::KModuleEntity:
N = static_cast<const ModuleEntity *>(N)->Name;
break;
}
}

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@ -12,6 +12,7 @@
#include <cstddef>
#include <string>
#include <string_view>
namespace llvm {
/// This is a llvm local version of __cxa_demangle. Other than the name and
@ -29,9 +30,10 @@ enum : int {
demangle_success = 0,
};
char *itaniumDemangle(const char *mangled_name, char *buf, size_t *n,
int *status);
/// Returns a non-NULL pointer to a NUL-terminated C style string
/// that should be explicitly freed, if successful. Otherwise, may return
/// nullptr if mangled_name is not a valid mangling or is nullptr.
char *itaniumDemangle(std::string_view mangled_name);
enum MSDemangleFlags {
MSDF_None = 0,
@ -40,10 +42,34 @@ enum MSDemangleFlags {
MSDF_NoCallingConvention = 1 << 2,
MSDF_NoReturnType = 1 << 3,
MSDF_NoMemberType = 1 << 4,
MSDF_NoVariableType = 1 << 5,
};
char *microsoftDemangle(const char *mangled_name, char *buf, size_t *n,
/// Demangles the Microsoft symbol pointed at by mangled_name and returns it.
/// Returns a pointer to the start of a null-terminated demangled string on
/// success, or nullptr on error.
/// If n_read is non-null and demangling was successful, it receives how many
/// bytes of the input string were consumed.
/// status receives one of the demangle_ enum entries above if it's not nullptr.
/// Flags controls various details of the demangled representation.
char *microsoftDemangle(std::string_view mangled_name, size_t *n_read,
int *status, MSDemangleFlags Flags = MSDF_None);
// Demangles a Rust v0 mangled symbol.
char *rustDemangle(std::string_view MangledName);
// Demangles a D mangled symbol.
char *dlangDemangle(std::string_view MangledName);
/// Attempt to demangle a string using different demangling schemes.
/// The function uses heuristics to determine which demangling scheme to use.
/// \param MangledName - reference to string to demangle.
/// \returns - the demangled string, or a copy of the input string if no
/// demangling occurred.
std::string demangle(std::string_view MangledName);
bool nonMicrosoftDemangle(std::string_view MangledName, std::string &Result);
/// "Partial" demangler. This supports demangling a string into an AST
/// (typically an intermediate stage in itaniumDemangle) and querying certain
/// properties or partially printing the demangled name.
@ -59,7 +85,7 @@ struct ItaniumPartialDemangler {
bool partialDemangle(const char *MangledName);
/// Just print the entire mangled name into Buf. Buf and N behave like the
/// second and third parameters to itaniumDemangle.
/// second and third parameters to __cxa_demangle.
char *finishDemangle(char *Buf, size_t *N) const;
/// Get the base name of a function. This doesn't include trailing template
@ -95,6 +121,7 @@ struct ItaniumPartialDemangler {
bool isSpecialName() const;
~ItaniumPartialDemangler();
private:
void *RootNode;
void *Context;

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@ -13,8 +13,8 @@
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_DEMANGLE_COMPILER_H
#define LLVM_DEMANGLE_COMPILER_H
#ifndef LLVM_DEMANGLE_DEMANGLECONFIG_H
#define LLVM_DEMANGLE_DEMANGLECONFIG_H
#ifndef __has_feature
#define __has_feature(x) 0

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@ -0,0 +1,96 @@
//===--- ItaniumNodes.def ------------*- mode:c++;eval:(read-only-mode) -*-===//
// Do not edit! See README.txt.
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-FileCopyrightText: Part of the LLVM Project
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Define the demangler's node names
#ifndef NODE
#error Define NODE to handle nodes
#endif
NODE(NodeArrayNode)
NODE(DotSuffix)
NODE(VendorExtQualType)
NODE(QualType)
NODE(ConversionOperatorType)
NODE(PostfixQualifiedType)
NODE(ElaboratedTypeSpefType)
NODE(NameType)
NODE(AbiTagAttr)
NODE(EnableIfAttr)
NODE(ObjCProtoName)
NODE(PointerType)
NODE(ReferenceType)
NODE(PointerToMemberType)
NODE(ArrayType)
NODE(FunctionType)
NODE(NoexceptSpec)
NODE(DynamicExceptionSpec)
NODE(FunctionEncoding)
NODE(LiteralOperator)
NODE(SpecialName)
NODE(CtorVtableSpecialName)
NODE(QualifiedName)
NODE(NestedName)
NODE(LocalName)
NODE(ModuleName)
NODE(ModuleEntity)
NODE(VectorType)
NODE(PixelVectorType)
NODE(BinaryFPType)
NODE(BitIntType)
NODE(SyntheticTemplateParamName)
NODE(TypeTemplateParamDecl)
NODE(NonTypeTemplateParamDecl)
NODE(TemplateTemplateParamDecl)
NODE(TemplateParamPackDecl)
NODE(ParameterPack)
NODE(TemplateArgumentPack)
NODE(ParameterPackExpansion)
NODE(TemplateArgs)
NODE(ForwardTemplateReference)
NODE(NameWithTemplateArgs)
NODE(GlobalQualifiedName)
NODE(ExpandedSpecialSubstitution)
NODE(SpecialSubstitution)
NODE(CtorDtorName)
NODE(DtorName)
NODE(UnnamedTypeName)
NODE(ClosureTypeName)
NODE(StructuredBindingName)
NODE(BinaryExpr)
NODE(ArraySubscriptExpr)
NODE(PostfixExpr)
NODE(ConditionalExpr)
NODE(MemberExpr)
NODE(SubobjectExpr)
NODE(EnclosingExpr)
NODE(CastExpr)
NODE(SizeofParamPackExpr)
NODE(CallExpr)
NODE(NewExpr)
NODE(DeleteExpr)
NODE(PrefixExpr)
NODE(FunctionParam)
NODE(ConversionExpr)
NODE(PointerToMemberConversionExpr)
NODE(InitListExpr)
NODE(FoldExpr)
NODE(ThrowExpr)
NODE(BoolExpr)
NODE(StringLiteral)
NODE(LambdaExpr)
NODE(EnumLiteral)
NODE(IntegerLiteral)
NODE(FloatLiteral)
NODE(DoubleLiteral)
NODE(LongDoubleLiteral)
NODE(BracedExpr)
NODE(BracedRangeExpr)
#undef NODE

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@ -1,5 +1,5 @@
//===--- StringView.h -------------------------------------------*- C++ -*-===//
//
//===--- StringView.h ----------------*- mode:c++;eval:(read-only-mode) -*-===//
// Do not edit! See README.txt.
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-FileCopyrightText: Part of the LLVM Project
@ -8,6 +8,9 @@
//===----------------------------------------------------------------------===//
//
// FIXME: Use std::string_view instead when we support C++17.
// There are two copies of this file in the source tree. The one under
// libcxxabi is the original and the one under llvm is the copy. Use
// cp-to-llvm.sh to update the copy. See README.txt for more details.
//
//===----------------------------------------------------------------------===//
@ -15,7 +18,6 @@
#define DEMANGLE_STRINGVIEW_H
#include "DemangleConfig.h"
#include <algorithm>
#include <cassert>
#include <cstring>
@ -37,29 +39,23 @@ public:
StringView(const char *Str) : First(Str), Last(Str + std::strlen(Str)) {}
StringView() : First(nullptr), Last(nullptr) {}
StringView substr(size_t From) const {
return StringView(begin() + From, size() - From);
StringView substr(size_t Pos, size_t Len = npos) const {
assert(Pos <= size());
if (Len > size() - Pos)
Len = size() - Pos;
return StringView(begin() + Pos, Len);
}
size_t find(char C, size_t From = 0) const {
size_t FindBegin = std::min(From, size());
// Avoid calling memchr with nullptr.
if (FindBegin < size()) {
if (From < size()) {
// Just forward to memchr, which is faster than a hand-rolled loop.
if (const void *P = ::memchr(First + FindBegin, C, size() - FindBegin))
if (const void *P = ::memchr(First + From, C, size() - From))
return size_t(static_cast<const char *>(P) - First);
}
return npos;
}
StringView substr(size_t From, size_t To) const {
if (To >= size())
To = size() - 1;
if (From >= size())
From = size() - 1;
return StringView(First + From, First + To);
}
StringView dropFront(size_t N = 1) const {
if (N >= size())
N = size();
@ -106,7 +102,7 @@ public:
bool startsWith(StringView Str) const {
if (Str.size() > size())
return false;
return std::equal(Str.begin(), Str.end(), begin());
return std::strncmp(Str.begin(), begin(), Str.size()) == 0;
}
const char &operator[](size_t Idx) const { return *(begin() + Idx); }
@ -119,7 +115,7 @@ public:
inline bool operator==(const StringView &LHS, const StringView &RHS) {
return LHS.size() == RHS.size() &&
std::equal(LHS.begin(), LHS.end(), RHS.begin());
std::strncmp(LHS.begin(), RHS.begin(), LHS.size()) == 0;
}
DEMANGLE_NAMESPACE_END

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@ -0,0 +1,39 @@
//===--- StringViewExtras.h ----------*- mode:c++;eval:(read-only-mode) -*-===//
// Do not edit! See README.txt.
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-FileCopyrightText: Part of the LLVM Project
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// There are two copies of this file in the source tree. The one under
// libcxxabi is the original and the one under llvm is the copy. Use
// cp-to-llvm.sh to update the copy. See README.txt for more details.
//
//===----------------------------------------------------------------------===//
#ifndef DEMANGLE_STRINGVIEW_H
#define DEMANGLE_STRINGVIEW_H
#include "DemangleConfig.h"
#include <string_view>
DEMANGLE_NAMESPACE_BEGIN
inline bool starts_with(std::string_view self, char C) noexcept {
return !self.empty() && *self.begin() == C;
}
inline bool starts_with(std::string_view haystack,
std::string_view needle) noexcept {
if (needle.size() > haystack.size())
return false;
haystack.remove_suffix(haystack.size() - needle.size());
return haystack == needle;
}
DEMANGLE_NAMESPACE_END
#endif

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@ -1,5 +1,5 @@
//===--- Utility.h ----------------------------------------------*- C++ -*-===//
//
//===--- Utility.h -------------------*- mode:c++;eval:(read-only-mode) -*-===//
// Do not edit! See README.txt.
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-FileCopyrightText: Part of the LLVM Project
@ -7,70 +7,83 @@
//
//===----------------------------------------------------------------------===//
//
// Provide some utility classes for use in the demangler(s).
// Provide some utility classes for use in the demangler.
// There are two copies of this file in the source tree. The one in libcxxabi
// is the original and the one in llvm is the copy. Use cp-to-llvm.sh to update
// the copy. See README.txt for more details.
//
//===----------------------------------------------------------------------===//
#ifndef DEMANGLE_UTILITY_H
#define DEMANGLE_UTILITY_H
#include "StringView.h"
#include "DemangleConfig.h"
#include <array>
#include <cassert>
#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <iterator>
#include <exception>
#include <limits>
#include <string_view>
DEMANGLE_NAMESPACE_BEGIN
// Stream that AST nodes write their string representation into after the AST
// has been parsed.
class OutputStream {
char *Buffer;
size_t CurrentPosition;
size_t BufferCapacity;
class OutputBuffer {
char *Buffer = nullptr;
size_t CurrentPosition = 0;
size_t BufferCapacity = 0;
// Ensure there is at least n more positions in buffer.
// Ensure there are at least N more positions in the buffer.
void grow(size_t N) {
if (N + CurrentPosition >= BufferCapacity) {
size_t Need = N + CurrentPosition;
if (Need > BufferCapacity) {
// Reduce the number of reallocations, with a bit of hysteresis. The
// number here is chosen so the first allocation will more-than-likely not
// allocate more than 1K.
Need += 1024 - 32;
BufferCapacity *= 2;
if (BufferCapacity < N + CurrentPosition)
BufferCapacity = N + CurrentPosition;
if (BufferCapacity < Need)
BufferCapacity = Need;
Buffer = static_cast<char *>(std::realloc(Buffer, BufferCapacity));
if (Buffer == nullptr)
std::terminate();
}
}
void writeUnsigned(uint64_t N, bool isNeg = false) {
// Handle special case...
if (N == 0) {
*this << '0';
return;
}
OutputBuffer &writeUnsigned(uint64_t N, bool isNeg = false) {
std::array<char, 21> Temp;
char *TempPtr = Temp.data() + Temp.size();
char Temp[21];
char *TempPtr = std::end(Temp);
while (N) {
*--TempPtr = '0' + char(N % 10);
// Output at least one character.
do {
*--TempPtr = char('0' + N % 10);
N /= 10;
}
} while (N);
// Add negative sign...
// Add negative sign.
if (isNeg)
*--TempPtr = '-';
this->operator<<(StringView(TempPtr, std::end(Temp)));
return operator+=(
std::string_view(TempPtr, Temp.data() + Temp.size() - TempPtr));
}
public:
OutputStream(char *StartBuf, size_t Size)
: Buffer(StartBuf), CurrentPosition(0), BufferCapacity(Size) {}
OutputStream() = default;
void reset(char *Buffer_, size_t BufferCapacity_) {
CurrentPosition = 0;
Buffer = Buffer_;
BufferCapacity = BufferCapacity_;
OutputBuffer(char *StartBuf, size_t Size)
: Buffer(StartBuf), BufferCapacity(Size) {}
OutputBuffer(char *StartBuf, size_t *SizePtr)
: OutputBuffer(StartBuf, StartBuf ? *SizePtr : 0) {}
OutputBuffer() = default;
// Non-copyable
OutputBuffer(const OutputBuffer &) = delete;
OutputBuffer &operator=(const OutputBuffer &) = delete;
operator std::string_view() const {
return std::string_view(Buffer, CurrentPosition);
}
/// If a ParameterPackExpansion (or similar type) is encountered, the offset
@ -78,115 +91,116 @@ public:
unsigned CurrentPackIndex = std::numeric_limits<unsigned>::max();
unsigned CurrentPackMax = std::numeric_limits<unsigned>::max();
OutputStream &operator+=(StringView R) {
size_t Size = R.size();
if (Size == 0)
return *this;
/// When zero, we're printing template args and '>' needs to be parenthesized.
/// Use a counter so we can simply increment inside parentheses.
unsigned GtIsGt = 1;
bool isGtInsideTemplateArgs() const { return GtIsGt == 0; }
void printOpen(char Open = '(') {
GtIsGt++;
*this += Open;
}
void printClose(char Close = ')') {
GtIsGt--;
*this += Close;
}
OutputBuffer &operator+=(std::string_view R) {
if (size_t Size = R.size()) {
grow(Size);
std::memmove(Buffer + CurrentPosition, R.begin(), Size);
std::memcpy(Buffer + CurrentPosition, &*R.begin(), Size);
CurrentPosition += Size;
}
return *this;
}
OutputStream &operator+=(char C) {
OutputBuffer &operator+=(char C) {
grow(1);
Buffer[CurrentPosition++] = C;
return *this;
}
OutputStream &operator<<(StringView R) { return (*this += R); }
OutputBuffer &prepend(std::string_view R) {
size_t Size = R.size();
OutputStream &operator<<(char C) { return (*this += C); }
grow(Size);
std::memmove(Buffer + Size, Buffer, CurrentPosition);
std::memcpy(Buffer, &*R.begin(), Size);
CurrentPosition += Size;
OutputStream &operator<<(long long N) {
if (N < 0)
writeUnsigned(static_cast<unsigned long long>(-N), true);
else
writeUnsigned(static_cast<unsigned long long>(N));
return *this;
}
OutputStream &operator<<(unsigned long long N) {
writeUnsigned(N, false);
return *this;
OutputBuffer &operator<<(std::string_view R) { return (*this += R); }
OutputBuffer &operator<<(char C) { return (*this += C); }
OutputBuffer &operator<<(long long N) {
return writeUnsigned(static_cast<unsigned long long>(std::abs(N)), N < 0);
}
OutputStream &operator<<(long N) {
OutputBuffer &operator<<(unsigned long long N) {
return writeUnsigned(N, false);
}
OutputBuffer &operator<<(long N) {
return this->operator<<(static_cast<long long>(N));
}
OutputStream &operator<<(unsigned long N) {
OutputBuffer &operator<<(unsigned long N) {
return this->operator<<(static_cast<unsigned long long>(N));
}
OutputStream &operator<<(int N) {
OutputBuffer &operator<<(int N) {
return this->operator<<(static_cast<long long>(N));
}
OutputStream &operator<<(unsigned int N) {
OutputBuffer &operator<<(unsigned int N) {
return this->operator<<(static_cast<unsigned long long>(N));
}
void insert(size_t Pos, const char *S, size_t N) {
assert(Pos <= CurrentPosition);
if (N == 0)
return;
grow(N);
std::memmove(Buffer + Pos + N, Buffer + Pos, CurrentPosition - Pos);
std::memcpy(Buffer + Pos, S, N);
CurrentPosition += N;
}
size_t getCurrentPosition() const { return CurrentPosition; }
void setCurrentPosition(size_t NewPos) { CurrentPosition = NewPos; }
char back() const {
return CurrentPosition ? Buffer[CurrentPosition - 1] : '\0';
assert(CurrentPosition);
return Buffer[CurrentPosition - 1];
}
bool empty() const { return CurrentPosition == 0; }
char *getBuffer() { return Buffer; }
char *getBufferEnd() { return Buffer + CurrentPosition - 1; }
size_t getBufferCapacity() { return BufferCapacity; }
size_t getBufferCapacity() const { return BufferCapacity; }
};
template <class T> class SwapAndRestore {
T &Restore;
T OriginalValue;
bool ShouldRestore = true;
template <class T> class ScopedOverride {
T &Loc;
T Original;
public:
SwapAndRestore(T &Restore_) : SwapAndRestore(Restore_, Restore_) {}
ScopedOverride(T &Loc_) : ScopedOverride(Loc_, Loc_) {}
SwapAndRestore(T &Restore_, T NewVal)
: Restore(Restore_), OriginalValue(Restore) {
Restore = std::move(NewVal);
}
~SwapAndRestore() {
if (ShouldRestore)
Restore = std::move(OriginalValue);
ScopedOverride(T &Loc_, T NewVal) : Loc(Loc_), Original(Loc_) {
Loc_ = std::move(NewVal);
}
~ScopedOverride() { Loc = std::move(Original); }
void shouldRestore(bool ShouldRestore_) { ShouldRestore = ShouldRestore_; }
void restoreNow(bool Force) {
if (!Force && !ShouldRestore)
return;
Restore = std::move(OriginalValue);
ShouldRestore = false;
}
SwapAndRestore(const SwapAndRestore &) = delete;
SwapAndRestore &operator=(const SwapAndRestore &) = delete;
ScopedOverride(const ScopedOverride &) = delete;
ScopedOverride &operator=(const ScopedOverride &) = delete;
};
inline bool initializeOutputStream(char *Buf, size_t *N, OutputStream &S,
size_t InitSize) {
size_t BufferSize;
if (Buf == nullptr) {
Buf = static_cast<char *>(std::malloc(InitSize));
if (Buf == nullptr)
return false;
BufferSize = InitSize;
} else
BufferSize = *N;
S.reset(Buf, BufferSize);
return true;
}
DEMANGLE_NAMESPACE_END
#endif