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/* -*- c++ -*- */
/*
* Copyright (C) 2010 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef ANDROID_ASTL_IOS_BASE_H__
#define ANDROID_ASTL_IOS_BASE_H__
#include <ios_pos_types.h>
namespace android {
// Flags are used to put the stream is a certain state which affect
// how data is formatted.
enum IosBaseFlags {
ios_baseflags_boolalpha = 1 << 0,
ios_baseflags_dec = 1 << 1,
ios_baseflags_fixed = 1 << 2,
ios_baseflags_hex = 1 << 3,
ios_baseflags_internal = 1 << 4,
ios_baseflags_left = 1 << 5,
ios_baseflags_oct = 1 << 6,
ios_baseflags_right = 1 << 7,
ios_baseflags_scientific = 1 << 8,
ios_baseflags_showbase = 1 << 9,
ios_baseflags_showpoint = 1 << 10,
ios_baseflags_showpos = 1 << 11,
ios_baseflags_skipws = 1 << 12,
ios_baseflags_unitbuf = 1 << 13,
ios_baseflags_uppercase = 1 << 14,
ios_baseflags_adjustfield = ios_baseflags_left | ios_baseflags_right | ios_baseflags_internal,
ios_baseflags_basefield = ios_baseflags_dec | ios_baseflags_oct | ios_baseflags_hex,
ios_baseflags_floatfield = ios_baseflags_scientific | ios_baseflags_fixed,
ios_baseflags_end = 1 << 15
};
// Openmode
enum IosBaseOpenmode {
ios_baseopenmode_app = 1 << 0,
ios_baseopenmode_ate = 1 << 1,
ios_baseopenmode_binary = 1 << 2,
ios_baseopenmode_in = 1 << 3,
ios_baseopenmode_out = 1 << 4,
ios_baseopenmode_trunc = 1 << 5,
ios_baseopenmode_end = 1 << 6
};
} // namespace android
namespace std {
/**
* Root of the streams inheritance.
* The STL defines ios_base as a template with 2 params char types and
* traits. We support only char and no traits.
* ios_base defines flags, types and fields to hold these values.
* ios_base is extended by basic_ios which wraps a streambuf and
* provides common methods for all streams.
* The only mode supported for the standards streams (cout, cerr, cin)
* is synced with stdio.
*/
class ios_base
{
public:
typedef std::streampos streampos;
typedef std::streamoff streamoff;
protected:
ios_base();
public:
virtual ~ios_base();
typedef int fmtflags;
typedef int iostate;
typedef int openmode;
typedef int seekdir;
// FLAGS
// boolalpha: Insert and extract bool type in alphabetic format.
// dec: Convert integer input or generates integer output in
// decimal base.
// fixed: Generate floating-point output in a fixed-point notation.
// hex: Convert integer input or generates integer output in
// hexadecimal base.
// internal: Adds fill characters as the designated interanl point
// in certain generated output, or identical to right
// if no such point is designated.
// left: Adds fill characters on the right (final positions) of
// certain generated output.
// oct: Convert integer input or generates integer output in octal
// base.
// right: Adds fill characters on the left (initial positions) of
// certain generated output.
// scientific: Generates floating point output in scientific notation.
// showbase: Generates a prefix indicating the numeric base of generated
// integer output.
// showpoint: Generate a decimal point character unconditionally in
// generated floating point output.
// showpos: Generate a + sign in non-negative generated numeric output.
// skipws: Skips leading white space before certain input operations.
// unitbuf: Flushes output after each output operation.
// uppercase: Replaces certain lowercase letters with their upppercase
// equivalents in generated output.
static const fmtflags boolalpha = android::ios_baseflags_boolalpha;
static const fmtflags dec = android::ios_baseflags_dec;
static const fmtflags fixed = android::ios_baseflags_fixed;
static const fmtflags hex = android::ios_baseflags_hex;
static const fmtflags internal = android::ios_baseflags_internal;
static const fmtflags left = android::ios_baseflags_left;
static const fmtflags oct = android::ios_baseflags_oct;
static const fmtflags right = android::ios_baseflags_right;
static const fmtflags scientific = android::ios_baseflags_scientific;
static const fmtflags showbase = android::ios_baseflags_showbase;
static const fmtflags showpoint = android::ios_baseflags_showpoint;
static const fmtflags showpos = android::ios_baseflags_showpos;
static const fmtflags skipws = android::ios_baseflags_skipws;
static const fmtflags unitbuf = android::ios_baseflags_unitbuf;
static const fmtflags uppercase = android::ios_baseflags_uppercase;
static const fmtflags adjustfield = android::ios_baseflags_adjustfield;
static const fmtflags basefield = android::ios_baseflags_basefield;
static const fmtflags floatfield = android::ios_baseflags_floatfield;
// Set all the flags at once.
// @return the previous value of the format flags
fmtflags flags(fmtflags flags);
// @return all the flags at once
fmtflags flags() const { return mFlags; }
// Set flags.
// @return the previous value of the format flags
fmtflags setf(fmtflags flags);
// Clears 'mask' and set the 'flags' & 'mask'.
// @return the previous value of the format flags
fmtflags setf(fmtflags flags, fmtflags mask);
// Clears 'mask'.
void unsetf(fmtflags mask);
// OPENMODE
// app: seek to end before each write.
// ate: open and seek to end imediately after opening.
// binary: perform I/O in binary mode.
// in: open for input.
// out: open for output.
// trunc: truncate and existing stream when opening.
static const openmode app = android::ios_baseopenmode_app;
static const openmode ate = android::ios_baseopenmode_ate;
static const openmode binary = android::ios_baseopenmode_binary;
static const openmode in = android::ios_baseopenmode_in;
static const openmode out = android::ios_baseopenmode_out;
static const openmode trunc = android::ios_baseopenmode_trunc;
// PRECISION and WIDTH
/**
* @return The precision (number of digits after the decimal
* point) to generate on certain output conversions. 6 by default.
*/
streamsize precision() const { return mPrecision; }
/**
* @param precision The new precision value. Values < 0 are ignored.
* @return The previous value of precision(). 0 by default;
*/
streamsize precision(streamsize precision);
/**
* @return The minimum field width to generate on output
* operations.
*/
streamsize width() const { return mWidth; }
/**
* @param width The new width value. Values < 0 are ignored.
* @return The previous value of width().
*/
streamsize width(streamsize width);
// Helper class to initialize the standard streams. Its
// construction ensures the initialization of the stdio streams
// (cout, cerr,...) declared in iostream. These wrap the standard
// C streams declared in <cstdio>.
// The destruction of the last instance of this class will flush
// the streams.
class Init {
public:
Init();
~Init();
static bool done() { return sDone; }
private:
static int sGuard;
static bool sDone;
};
private:
fmtflags mFlags;
streamsize mPrecision;
streamsize mWidth;
};
} // namespace std
#endif
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