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