Program Listing for File text.hpp
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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2020 NKI/AVL, Netherlands Cancer Institute
*
* 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 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.
*/
#pragma once
#include "cif++/exports.hpp"
#include <charconv>
#include <cmath>
#include <cstdint>
#include <limits>
#include <set>
#include <sstream>
#include <tuple>
#include <vector>
#if __has_include(<experimental/type_traits>)
#include <experimental/type_traits>
#else
// sub optimal, but replicating the same code is worse
#include <zeep/type-traits.hpp>
#endif
namespace cif
{
// --------------------------------------------------------------------
// some basic utilities: Since we're using ASCII input only, we define for optimisation
// our own case conversion routines.
bool iequals(std::string_view a, std::string_view b);
int icompare(std::string_view a, std::string_view b);
bool iequals(const char *a, const char *b);
int icompare(const char *a, const char *b);
void to_lower(std::string &s);
std::string to_lower_copy(std::string_view s);
void to_upper(std::string &s);
template <typename IterType>
std::string join(IterType b, IterType e, std::string_view sep)
{
std::ostringstream s;
if (b != e)
{
auto ai = b;
auto ni = std::next(ai);
for (;;)
{
s << *ai;
if (ni == e)
break;
ai = ni;
ni = std::next(ai);
s << sep;
}
}
return s.str();
}
template <typename V>
std::string join(const V &arr, std::string_view sep)
{
return join(arr.begin(), arr.end(), sep);
}
template <typename StringType = std::string_view>
std::vector<StringType> split(std::string_view s, std::string_view separators, bool suppress_empty = false)
{
std::vector<StringType> result;
auto b = s.data();
auto e = b;
while (e != s.data() + s.length())
{
if (separators.find(*e) != std::string_view::npos)
{
if (e > b or not suppress_empty)
result.emplace_back(b, e - b);
b = e = e + 1;
continue;
}
++e;
}
if (e > b or not suppress_empty)
result.emplace_back(b, e - b);
return result;
}
void replace_all(std::string &s, std::string_view what, std::string_view with = {});
#if defined(__cpp_lib_starts_ends_with)
inline bool starts_with(std::string s, std::string_view with)
{
return s.starts_with(with);
}
inline bool ends_with(std::string_view s, std::string_view with)
{
return s.ends_with(with);
}
#else
inline bool starts_with(std::string s, std::string_view with)
{
return s.compare(0, with.length(), with) == 0;
}
inline bool ends_with(std::string_view s, std::string_view with)
{
return s.length() >= with.length() and s.compare(s.length() - with.length(), with.length(), with) == 0;
}
#endif
#if defined(__cpp_lib_string_contains)
inline bool contains(std::string_view s, std::string_view q)
{
return s.contains(q);
}
#else
inline bool contains(std::string_view s, std::string_view q)
{
return s.find(q) != std::string_view::npos;
}
#endif
bool icontains(std::string_view s, std::string_view q);
void trim_left(std::string &s);
void trim_right(std::string &s);
void trim(std::string &s);
std::string trim_left_copy(std::string_view s);
std::string trim_right_copy(std::string_view s);
std::string trim_copy(std::string_view s);
// To make life easier, we also define iless and iset using iequals
struct iless
{
bool operator()(const std::string &a, const std::string &b) const
{
return icompare(a, b) < 0;
}
};
using iset = std::set<std::string, iless>;
// --------------------------------------------------------------------
// This really makes a difference, having our own tolower routines
extern CIFPP_EXPORT const uint8_t kCharToLowerMap[256];
inline char tolower(int ch)
{
return static_cast<char>(kCharToLowerMap[static_cast<uint8_t>(ch)]);
}
// --------------------------------------------------------------------
std::tuple<std::string, std::string> split_tag_name(std::string_view tag);
// --------------------------------------------------------------------
std::string cif_id_for_number(int number);
// --------------------------------------------------------------------
std::vector<std::string> word_wrap(const std::string &text, size_t width);
// --------------------------------------------------------------------
template <typename FloatType, std::enable_if_t<std::is_floating_point_v<FloatType>, int> = 0>
std::from_chars_result from_chars(const char *first, const char *last, FloatType &value)
{
std::from_chars_result result{ first, {} };
enum State
{
IntegerSign,
Integer,
Fraction,
ExponentSign,
Exponent
} state = IntegerSign;
int sign = 1;
unsigned long long vi = 0;
long double f = 1;
int exponent_sign = 1;
int exponent = 0;
bool done = false;
while (not done and result.ec == std::errc())
{
char ch = result.ptr != last ? *result.ptr : 0;
++result.ptr;
switch (state)
{
case IntegerSign:
if (ch == '-')
{
sign = -1;
state = Integer;
}
else if (ch == '+')
state = Integer;
else if (ch >= '0' and ch <= '9')
{
vi = ch - '0';
state = Integer;
}
else if (ch == '.')
state = Fraction;
else
result.ec = std::errc::invalid_argument;
break;
case Integer:
if (ch >= '0' and ch <= '9')
vi = 10 * vi + (ch - '0');
else if (ch == 'e' or ch == 'E')
state = ExponentSign;
else if (ch == '.')
state = Fraction;
else
{
done = true;
--result.ptr;
}
break;
case Fraction:
if (ch >= '0' and ch <= '9')
{
vi = 10 * vi + (ch - '0');
f /= 10;
}
else if (ch == 'e' or ch == 'E')
state = ExponentSign;
else
{
done = true;
--result.ptr;
}
break;
case ExponentSign:
if (ch == '-')
{
exponent_sign = -1;
state = Exponent;
}
else if (ch == '+')
state = Exponent;
else if (ch >= '0' and ch <= '9')
{
exponent = ch - '0';
state = Exponent;
}
else
result.ec = std::errc::invalid_argument;
break;
case Exponent:
if (ch >= '0' and ch <= '9')
exponent = 10 * exponent + (ch - '0');
else
{
done = true;
--result.ptr;
}
break;
}
}
if (result.ec == std::errc())
{
long double v = f * vi * sign;
if (exponent != 0)
v *= std::pow(10, exponent * exponent_sign);
if (std::isnan(v))
result.ec = std::errc::invalid_argument;
else if (std::abs(v) > std::numeric_limits<FloatType>::max())
result.ec = std::errc::result_out_of_range;
value = static_cast<FloatType>(v);
}
return result;
}
enum class chars_format
{
scientific = 1,
fixed = 2,
// hex,
general = fixed | scientific
};
template <typename FloatType, std::enable_if_t<std::is_floating_point_v<FloatType>, int> = 0>
std::to_chars_result to_chars(char *first, char *last, FloatType &value, chars_format fmt)
{
int size = static_cast<int>(last - first);
int r = 0;
switch (fmt)
{
case chars_format::scientific:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%le", value);
else
r = snprintf(first, last - first, "%e", value);
break;
case chars_format::fixed:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%lf", value);
else
r = snprintf(first, last - first, "%f", value);
break;
case chars_format::general:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%lg", value);
else
r = snprintf(first, last - first, "%g", value);
break;
}
std::to_chars_result result;
if (r < 0 or r >= size)
result = { first, std::errc::value_too_large };
else
result = { first + r, std::errc() };
return result;
}
template <typename FloatType, std::enable_if_t<std::is_floating_point_v<FloatType>, int> = 0>
std::to_chars_result to_chars(char *first, char *last, FloatType &value, chars_format fmt, int precision)
{
int size = static_cast<int>(last - first);
int r = 0;
switch (fmt)
{
case chars_format::scientific:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%.*le", precision, value);
else
r = snprintf(first, last - first, "%.*e", precision, value);
break;
case chars_format::fixed:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%.*lf", precision, value);
else
r = snprintf(first, last - first, "%.*f", precision, value);
break;
case chars_format::general:
if constexpr (std::is_same_v<FloatType, long double>)
r = snprintf(first, last - first, "%.*lg", precision, value);
else
r = snprintf(first, last - first, "%.*g", precision, value);
break;
}
std::to_chars_result result;
if (r < 0 or r >= size)
result = { first, std::errc::value_too_large };
else
result = { first + r, std::errc() };
return result;
}
template <typename T>
struct my_charconv
{
static std::from_chars_result from_chars(const char *a, const char *b, T &d)
{
return cif::from_chars(a, b, d);
}
static std::to_chars_result to_chars(char *first, char *last, T &value, chars_format fmt)
{
return cif::to_chars(first, last, value, fmt);
}
};
template <typename T>
struct std_charconv
{
static std::from_chars_result from_chars(const char *a, const char *b, T &d)
{
return std::from_chars(a, b, d);
}
static std::to_chars_result to_chars(char *first, char *last, T &value, chars_format fmt)
{
return std::to_chars(first, last, value, fmt);
}
};
template <typename T>
using from_chars_function = decltype(std::from_chars(std::declval<const char *>(), std::declval<const char *>(), std::declval<T &>()));
template <typename T>
using selected_charconv = typename std::conditional_t<std::experimental::is_detected_v<from_chars_function, T>, std_charconv<T>, my_charconv<T>>;
} // namespace cif