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https://github.com/c64scene-ar/llvm-6502.git
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0861d1fa5c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49854 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
//===- llvm/ADT/SmallString.h - 'Normally small' strings --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the SmallString class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ADT_SMALLSTRING_H
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#define LLVM_ADT_SMALLSTRING_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/DataTypes.h"
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#include <cstring>
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namespace llvm {
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/// SmallString - A SmallString is just a SmallVector with methods and accessors
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/// that make it work better as a string (e.g. operator+ etc).
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template<unsigned InternalLen>
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class SmallString : public SmallVector<char, InternalLen> {
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public:
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// Default ctor - Initialize to empty.
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SmallString() {}
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// Initialize with a range.
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template<typename ItTy>
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SmallString(ItTy S, ItTy E) : SmallVector<char, InternalLen>(S, E) {}
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// Copy ctor.
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SmallString(const SmallString &RHS) : SmallVector<char, InternalLen>(RHS) {}
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// Extra methods.
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const char *c_str() const {
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SmallString *This = const_cast<SmallString*>(this);
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// Ensure that there is a \0 at the end of the string.
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This->reserve(this->size()+1);
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This->End[0] = 0;
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return this->begin();
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}
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// Extra operators.
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SmallString &operator+=(const char *RHS) {
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this->append(RHS, RHS+strlen(RHS));
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return *this;
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}
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SmallString &operator+=(char C) {
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this->push_back(C);
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return *this;
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}
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SmallString &append_uint_32(uint32_t N) {
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char Buffer[20];
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char *BufPtr = Buffer+20;
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if (N == 0) *--BufPtr = '0'; // Handle special case.
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while (N) {
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*--BufPtr = '0' + char(N % 10);
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N /= 10;
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}
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this->append(BufPtr, Buffer+20);
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return *this;
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}
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SmallString &append_uint(uint64_t N) {
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if (N == uint32_t(N))
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return append_uint_32(uint32_t(N));
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char Buffer[40];
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char *BufPtr = Buffer+40;
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if (N == 0) *--BufPtr = '0'; // Handle special case...
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while (N) {
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*--BufPtr = '0' + char(N % 10);
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N /= 10;
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}
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this->append(BufPtr, Buffer+40);
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return *this;
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}
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SmallString &append_sint(int64_t N) {
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// TODO, wrong for minint64.
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if (N < 0) {
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this->push_back('-');
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N = -N;
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}
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return append_uint(N);
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}
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};
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}
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#endif
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