/
word_io.h
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/
word_io.h
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/*
* Copyright 2011, Ben Langmead <blangmea@jhsph.edu>
*
* This file is part of Bowtie 2.
*
* Bowtie 2 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Bowtie 2 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Bowtie 2. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef WORD_IO_H_
#define WORD_IO_H_
#include <stdint.h>
#include <iostream>
#include <fstream>
#include "assert_helpers.h"
#include "endian_swap.h"
/**
* Write a 32-bit unsigned to an output stream being careful to
* re-endianize if caller-requested endianness differs from current
* host.
*/
static inline void writeU32(std::ostream& out, uint32_t x, bool toBigEndian) {
uint32_t y = endianizeU32(x, toBigEndian);
out.write((const char*)&y, 4);
}
/**
* Write a 32-bit unsigned to an output stream using the native
* endianness.
*/
static inline void writeU32(std::ostream& out, uint32_t x) {
out.write((const char*)&x, 4);
}
/**
* Write a 32-bit signed int to an output stream being careful to
* re-endianize if caller-requested endianness differs from current
* host.
*/
static inline void writeI32(std::ostream& out, int32_t x, bool toBigEndian) {
int32_t y = endianizeI32(x, toBigEndian);
out.write((const char*)&y, 4);
}
/**
* Write a 32-bit unsigned to an output stream using the native
* endianness.
*/
static inline void writeI32(std::ostream& out, int32_t x) {
out.write((const char*)&x, 4);
}
/**
* Read a 32-bit unsigned from an input stream, inverting endianness
* if necessary.
*/
static inline uint32_t readU32(std::istream& in, bool swap) {
uint32_t x;
in.read((char *)&x, 4);
assert_eq(4, in.gcount());
if(swap) {
return endianSwapU32(x);
} else {
return x;
}
}
/**
* Read a 32-bit unsigned from a file descriptor, optionally inverting
* endianness.
*/
static inline uint32_t readU32(int in, bool swap) {
uint32_t x;
if(read(in, (void *)&x, 4) != 4) {
assert(false);
}
if(swap) {
return endianSwapU32(x);
} else {
return x;
}
}
/**
* Read a 32-bit unsigned from a FILE*, optionally inverting
* endianness.
*/
static inline uint32_t readU32(FILE* in, bool swap) {
uint32_t x;
if(fread((void *)&x, 1, 4, in) != 4) {
assert(false);
}
if(swap) {
return endianSwapU32(x);
} else {
return x;
}
}
/**
* Read a 32-bit signed from an input stream, inverting endianness
* if necessary.
*/
static inline int32_t readI32(std::istream& in, bool swap) {
int32_t x;
in.read((char *)&x, 4);
assert_eq(4, in.gcount());
if(swap) {
return endianSwapI32(x);
} else {
return x;
}
}
/**
* Read a 32-bit unsigned from a file descriptor, optionally inverting
* endianness.
*/
static inline uint32_t readI32(int in, bool swap) {
int32_t x;
if(read(in, (void *)&x, 4) != 4) {
assert(false);
}
if(swap) {
return endianSwapI32(x);
} else {
return x;
}
}
/**
* Read a 32-bit unsigned from a FILE*, optionally inverting
* endianness.
*/
static inline uint32_t readI32(FILE* in, bool swap) {
int32_t x;
if(fread((void *)&x, 1, 4, in) != 4) {
assert(false);
}
if(swap) {
return endianSwapI32(x);
} else {
return x;
}
}
#endif /*WORD_IO_H_*/