SmallString.h revision dd94c8d6b2afb9c33c364ac8f0c8f8ed5d4c04a0 
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};
53
54
55}
56
57#endif
58