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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2013 David Chisnall
* All rights reserved.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#ifndef _UTIL_HH_
#define _UTIL_HH_
#include <vector>
// If we aren't using C++11, then just ignore static asserts.
#if __cplusplus < 201103L
#ifndef static_assert
#define static_assert(x, y) ((void)0)
#endif
#endif
namespace dtc {
/**
* Type for a buffer of bytes. This is used for a lot of short-lived temporary
* variables, so may eventually be changed to something like LLVM's
* SmallVector, but currently the program runs in a tiny fraction of a second,
* so this is not an issue.
*/
typedef std::vector<uint8_t> byte_buffer;
/**
* Helper function to push a big endian value into a byte buffer. We use
* native-endian values for all of the in-memory data structures and only
* transform them into big endian form for output.
*/
template<typename T>
inline void push_big_endian(byte_buffer &v, T val)
{
static_assert(sizeof(T) > 1,
"Big endian doesn't make sense for single-byte values");
for (int bit=(sizeof(T) - 1)*8 ; bit>=0 ; bit-= 8)
{
v.push_back((val >> bit) & 0xff);
}
}
void push_string(byte_buffer &v, const std::string &s, bool escapes=false);
/**
* Simple inline non-locale-aware check that this is a valid ASCII
* digit.
*/
inline bool isdigit(char c)
{
return (c >= '0') && (c <= '9');
}
/**
* Simple inline non-locale-aware check that this is a valid ASCII
* hex digit.
*/
inline bool ishexdigit(char c)
{
return ((c >= '0') && (c <= '9')) || ((c >= 'a') && (c <= 'f')) ||
((c >= 'A') && (c <= 'F'));
}
/**
* Simple inline non-locale-aware check that this is a valid ASCII
* letter.
*/
inline bool isalpha(char c)
{
return ((c >= 'a') && (c <= 'z')) || ((c >= 'A') && (c <= 'Z'));
}
/**
* A wrapper around dirname(3) that handles inconsistencies relating to memory
* management between platforms and provides a std::string interface.
*/
std::string dirname(const std::string&);
/**
* A wrapper around basename(3) that handles inconsistencies relating to memory
* management between platforms and provides a std::string interface.
*/
std::string basename(const std::string&);
}// namespace dtc
#endif // !_UTIL_HH_
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