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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OSTREAMS_H_
#define V8_OSTREAMS_H_
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include "include/v8config.h"
#include "src/base/macros.h"
namespace v8 {
namespace internal {
// An abstract base class for output streams with a cut-down standard interface.
class OStream {
public:
OStream() : hex_(false) { }
virtual ~OStream() { }
// For manipulators like 'os << endl' or 'os << flush', etc.
OStream& operator<<(OStream& (*manipulator)(OStream& os)) {
return manipulator(*this);
}
// Numeric conversions.
OStream& operator<<(short x); // NOLINT(runtime/int)
OStream& operator<<(unsigned short x); // NOLINT(runtime/int)
OStream& operator<<(int x);
OStream& operator<<(unsigned int x);
OStream& operator<<(long x); // NOLINT(runtime/int)
OStream& operator<<(unsigned long x); // NOLINT(runtime/int)
OStream& operator<<(long long x); // NOLINT(runtime/int)
OStream& operator<<(unsigned long long x); // NOLINT(runtime/int)
OStream& operator<<(double x);
OStream& operator<<(void* x);
// Character output.
OStream& operator<<(char x);
OStream& operator<<(signed char x);
OStream& operator<<(unsigned char x);
OStream& operator<<(const char* s) { return write(s, strlen(s)); }
OStream& put(char c) { return write(&c, 1); }
// Primitive format flag handling, can be extended if needed.
OStream& dec();
OStream& hex();
virtual OStream& write(const char* s, size_t n) = 0;
virtual OStream& flush() = 0;
private:
template<class T> OStream& print(const char* format, T x);
bool hex_;
DISALLOW_COPY_AND_ASSIGN(OStream);
};
// Some manipulators.
OStream& flush(OStream& os); // NOLINT(runtime/references)
OStream& endl(OStream& os); // NOLINT(runtime/references)
OStream& dec(OStream& os); // NOLINT(runtime/references)
OStream& hex(OStream& os); // NOLINT(runtime/references)
// An output stream writing to a character buffer.
class OStringStream: public OStream {
public:
OStringStream() : size_(0), capacity_(32), data_(allocate(capacity_)) {
data_[0] = '\0';
}
~OStringStream() { deallocate(data_, capacity_); }
size_t size() const { return size_; }
size_t capacity() const { return capacity_; }
const char* data() const { return data_; }
// Internally, our character data is always 0-terminated.
const char* c_str() const { return data(); }
virtual OStringStream& write(const char* s, size_t n) OVERRIDE;
virtual OStringStream& flush() OVERRIDE;
private:
// Primitive allocator interface, can be extracted if needed.
static char* allocate (size_t n) { return new char[n]; }
static void deallocate (char* s, size_t n) { delete[] s; }
void reserve(size_t requested_capacity);
size_t size_;
size_t capacity_;
char* data_;
DISALLOW_COPY_AND_ASSIGN(OStringStream);
};
// An output stream writing to a file.
class OFStream: public OStream {
public:
explicit OFStream(FILE* f) : f_(f) { }
virtual ~OFStream() { }
virtual OFStream& write(const char* s, size_t n) OVERRIDE;
virtual OFStream& flush() OVERRIDE;
private:
FILE* const f_;
DISALLOW_COPY_AND_ASSIGN(OFStream);
};
// Wrappers to disambiguate uint16_t and uc16.
struct AsUC16 {
explicit AsUC16(uint16_t v) : value(v) {}
uint16_t value;
};
struct AsReversiblyEscapedUC16 {
explicit AsReversiblyEscapedUC16(uint16_t v) : value(v) {}
uint16_t value;
};
// Writes the given character to the output escaping everything outside of
// printable/space ASCII range. Additionally escapes '\' making escaping
// reversible.
OStream& operator<<(OStream& os, const AsReversiblyEscapedUC16& c);
// Writes the given character to the output escaping everything outside
// of printable ASCII range.
OStream& operator<<(OStream& os, const AsUC16& c);
} } // namespace v8::internal
#endif // V8_OSTREAMS_H_
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