mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
87d13166c7
This is how it should've been and brings it more in line with std::string_view. There should be no functional change here. This is mostly mechanical from a custom clang-tidy check, with a lot of manual fixups. It uncovers a lot of minor inefficiencies. This doesn't actually modify StringRef yet, I'll do that in a follow-up.
105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
//===- StringToOffsetTable.h - Emit a big concatenated string ---*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TABLEGEN_STRINGTOOFFSETTABLE_H
|
|
#define LLVM_TABLEGEN_STRINGTOOFFSETTABLE_H
|
|
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cctype>
|
|
|
|
namespace llvm {
|
|
|
|
/// StringToOffsetTable - This class uniques a bunch of nul-terminated strings
|
|
/// and keeps track of their offset in a massive contiguous string allocation.
|
|
/// It can then output this string blob and use indexes into the string to
|
|
/// reference each piece.
|
|
class StringToOffsetTable {
|
|
StringMap<unsigned> StringOffset;
|
|
std::string AggregateString;
|
|
|
|
public:
|
|
bool Empty() const { return StringOffset.empty(); }
|
|
|
|
unsigned GetOrAddStringOffset(StringRef Str, bool appendZero = true) {
|
|
auto IterBool =
|
|
StringOffset.insert(std::make_pair(Str, AggregateString.size()));
|
|
if (IterBool.second) {
|
|
// Add the string to the aggregate if this is the first time found.
|
|
AggregateString.append(Str.begin(), Str.end());
|
|
if (appendZero)
|
|
AggregateString += '\0';
|
|
}
|
|
|
|
return IterBool.first->second;
|
|
}
|
|
|
|
void EmitString(raw_ostream &O) {
|
|
// Escape the string.
|
|
SmallString<256> Str;
|
|
raw_svector_ostream(Str).write_escaped(AggregateString);
|
|
AggregateString = std::string(Str.str());
|
|
|
|
O << " \"";
|
|
unsigned CharsPrinted = 0;
|
|
for (unsigned i = 0, e = AggregateString.size(); i != e; ++i) {
|
|
if (CharsPrinted > 70) {
|
|
O << "\"\n \"";
|
|
CharsPrinted = 0;
|
|
}
|
|
O << AggregateString[i];
|
|
++CharsPrinted;
|
|
|
|
// Print escape sequences all together.
|
|
if (AggregateString[i] != '\\')
|
|
continue;
|
|
|
|
assert(i + 1 < AggregateString.size() && "Incomplete escape sequence!");
|
|
if (isdigit(AggregateString[i + 1])) {
|
|
assert(isdigit(AggregateString[i + 2]) &&
|
|
isdigit(AggregateString[i + 3]) &&
|
|
"Expected 3 digit octal escape!");
|
|
O << AggregateString[++i];
|
|
O << AggregateString[++i];
|
|
O << AggregateString[++i];
|
|
CharsPrinted += 3;
|
|
} else {
|
|
O << AggregateString[++i];
|
|
++CharsPrinted;
|
|
}
|
|
}
|
|
O << "\"";
|
|
}
|
|
|
|
/// Emit the string using character literals. MSVC has a limitation that
|
|
/// string literals cannot be longer than 64K.
|
|
void EmitCharArray(raw_ostream &O) {
|
|
assert(AggregateString.find(')') == std::string::npos &&
|
|
"can't emit raw string with closing parens");
|
|
int Count = 0;
|
|
O << ' ';
|
|
for (char C : AggregateString) {
|
|
O << " \'";
|
|
O.write_escaped(StringRef(&C, 1));
|
|
O << "\',";
|
|
Count++;
|
|
if (Count > 14) {
|
|
O << "\n ";
|
|
Count = 0;
|
|
}
|
|
}
|
|
O << '\n';
|
|
}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|