SmallString.h revision 703f5291c4f7199a95274df5e3381b36f8faf38c
1//===- llvm/ADT/SmallString.h - 'Normally small' strings --------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file was developed by Chris Lattner and is distributed under 6// the University of Illinois Open Source 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 <cstring> 19 20namespace llvm { 21 22/// SmallString - A SmallString is just a SmallVector with methods and accessors 23/// that make it work better as a string (e.g. operator+ etc). 24template<unsigned InternalLen> 25class SmallString : public SmallVector<char, InternalLen> { 26public: 27 // Default ctor - Initialize to empty. 28 SmallString() {} 29 30 // Initialize with a range. 31 template<typename ItTy> 32 SmallString(ItTy S, ItTy E) : SmallVector<char, InternalLen>(S, E) {} 33 34 // Copy ctor. 35 SmallString(const SmallString &RHS) : SmallVector<char, InternalLen>(RHS) {} 36 37 38 // Extra methods. 39 const char *c_str() const { 40 SmallString *This = const_cast<SmallString*>(this); 41 // Ensure that there is a \0 at the end of the string. 42 This->reserve(this->size()+1); 43 This->End[0] = 0; 44 return this->begin(); 45 } 46 47 // Extra operators. 48 SmallString &operator+=(const char *RHS) { 49 this->append(RHS, RHS+strlen(RHS)); 50 return *this; 51 } 52 SmallString &operator+=(char C) { 53 this->push_back(C); 54 return *this; 55 } 56 57}; 58 59 60} 61 62#endif 63