SmallString.h revision 921be7a6f245f42accaa4f001271cb3f0c513d76
1//===- llvm/ADT/SmallString.h - 'Normally small' strings --------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the SmallString class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_ADT_SMALLSTRING_H 15#define LLVM_ADT_SMALLSTRING_H 16 17#include "llvm/ADT/SmallVector.h" 18#include "llvm/Support/DataTypes.h" 19#include <cstring> 20 21namespace llvm { 22 23/// SmallString - A SmallString is just a SmallVector with methods and accessors 24/// that make it work better as a string (e.g. operator+ etc). 25template<unsigned InternalLen> 26class SmallString : public SmallVector<char, InternalLen> { 27public: 28 // Default ctor - Initialize to empty. 29 SmallString() {} 30 31 // Initialize with a range. 32 template<typename ItTy> 33 SmallString(ItTy S, ItTy E) : SmallVector<char, InternalLen>(S, E) {} 34 35 // Copy ctor. 36 SmallString(const SmallString &RHS) : SmallVector<char, InternalLen>(RHS) {} 37 38 39 // Extra methods. 40 const char *c_str() const { 41 SmallString *This = const_cast<SmallString*>(this); 42 // Ensure that there is a \0 at the end of the string. 43 This->reserve(this->size()+1); 44 This->End[0] = 0; 45 return this->begin(); 46 } 47 48 // Extra operators. 49 const SmallString &operator=(const char *RHS) { 50 this->clear(); 51 return *this += RHS; 52 } 53 54 SmallString &operator+=(const char *RHS) { 55 this->append(RHS, RHS+strlen(RHS)); 56 return *this; 57 } 58 SmallString &operator+=(char C) { 59 this->push_back(C); 60 return *this; 61 } 62}; 63 64 65} 66 67#endif 68