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-/*************************************************************************
-** utility.hpp **
-** **
-** This file is part of dvisvgm -- a fast DVI to SVG converter **
-** Copyright (C) 2005-2021 Martin Gieseking <martin.gieseking@uos.de> **
-** **
-** This program 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. **
-** **
-** This program 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 this program; if not, see <http://www.gnu.org/licenses/>. **
-*************************************************************************/
-
-#ifndef UTILITY_HPP
-#define UTILITY_HPP
-
-#include <iomanip>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <vector>
-
-namespace math {
-
-constexpr const double PI = 3.141592653589793238462643383279502884;
-constexpr const double HALF_PI = 1.570796326794896619231321691639751442;
-constexpr const double TWO_PI = 6.283185307179586476925286766559005768;
-constexpr const double SQRT2 = 1.414213562373095048801688724209698079;
-
-inline double deg2rad (double deg) {return PI*deg/180.0;}
-inline double rad2deg (double rad) {return 180.0*rad/PI;}
-double normalize_angle (double angle, double mod);
-double normalize_0_2pi (double rad);
-std::vector<double> svd (const double (&m)[2][2]);
-
-/** Signum function (returns x/abs(x) if x != 0, and 0 otherwise). */
-template <typename T>
-inline int sgn (T x) {return (x > T(0)) - (x < T(0));}
-
-} // namespace math
-
-namespace util {
-
-template <typename T>
-std::string tohex (T val) {
- std::ostringstream oss;
- oss << std::hex << val;
- return oss.str();
-}
-
-std::string trim (const std::string &str, const char *ws=" \t\n\r\f");
-std::string normalize_space (std::string str, const char *ws=" \t\n\r\f");
-std::string tolower (const std::string &str);
-std::string replace (std::string str, const std::string &find, const std::string &repl);
-std::string to_string (double val);
-std::vector<std::string> split (const std::string &str, const std::string &sep);
-int ilog10 (int n);
-
-std::string read_file_contents (const std::string &fname);
-void write_file_contents (const std::string &fname, std::string::iterator start, std::string::iterator end);
-
-
-/** Returns a sequence of bytes of a given integral value.
- * @param[in] val get bytes of this value
- * @param[in] n number of bytes to extract (from LSB to MSB), all if n == 0
- * @return vector of bytes in big-endian order */
-template <typename T>
-std::vector<uint8_t> bytes (T val, int n=0) {
- if (n <= 0)
- n = sizeof(T);
- std::vector<uint8_t> ret(n);
- for (int i=0; i < n; i++) {
- ret[n-i-1] = val & 0xff;
- val >>= 8;
- }
- return ret;
-}
-
-
-/** Encodes the bytes in the half-open range [first,last) to Base64 and writes
- * the result to the range starting at 'dest'.
- * @param[in] first initial position of the range to be encoded
- * @param[in] last final position of the range to be encoded
- * @param[in] dest first position of the destination range
- * @param[in] wrap if > 0, add a newline after the given number of characters written */
-template <typename InputIterator, typename OutputIterator>
-void base64_copy (InputIterator first, InputIterator last, OutputIterator dest, int wrap=0) {
- static const char *base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- int count=0;
- while (first != last) {
- int padding = 0;
- unsigned char c0 = *first++, c1=0, c2=0;
- if (first == last)
- padding = 2;
- else {
- c1 = *first++;
- if (first == last)
- padding = 1;
- else
- c2 = *first++;
- }
- uint32_t n = (c0 << 16) | (c1 << 8) | c2;
- for (int i=0; i <= 3-padding; i++) {
- if (wrap > 0 && ++count > wrap) {
- count = 1;
- *dest++ = '\n';
- }
- *dest++ = base64_chars[(n >> 18) & 0x3f];
- n <<= 6;
- }
- while (padding--) {
- if (wrap > 0 && ++count > wrap) {
- count = 1;
- *dest++ = '\n';
- }
- *dest++ = '=';
- }
- }
-}
-
-
-inline void base64_copy (std::istream &is, std::ostream &os, int wrap=0) {
- base64_copy(std::istreambuf_iterator<char>(is), std::istreambuf_iterator<char>(), std::ostreambuf_iterator<char>(os), wrap);
-}
-
-
-/** Simple implementation mimicking std::make_unique introduced in C++14.
- * Constructs an object of class T on the heap and returns a unique_ptr<T> to it.
- * @param[in] args arguments forwarded to an constructor of T */
-template<typename T, typename... Args>
-std::unique_ptr<T> make_unique (Args&&... args) {
- return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-}
-
-
-template<typename T, typename U>
-std::unique_ptr<T> static_unique_ptr_cast (std::unique_ptr<U> &&old){
- return std::unique_ptr<T>{static_cast<T*>(old.release())};
-}
-
-} // namespace util
-
-#endif