Merge commit '1531d6e543' as 'gitstatus'

gitstatus/src/print.h

@@ -0,0 +1,101 @@
+// Copyright 2019 Roman Perepelitsa.
+//
+// This file is part of GitStatus.
+//
+// GitStatus 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.
+//
+// GitStatus 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 GitStatus. If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef ROMKATV_GITSTATUS_PRINT_H_
+#define ROMKATV_GITSTATUS_PRINT_H_
+
+#include <sys/stat.h>
+
+#include <iomanip>
+#include <ostream>
+#include <string>
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+#include <git2.h>
+
+#include "string_view.h"
+#include "strings.h"
+
+namespace gitstatus {
+
+template <class T>
+struct Printable {
+  const T& value;
+};
+
+template <class T>
+Printable<T> Print(const T& val) {
+  return {val};
+}
+
+template <class T>
+std::ostream& operator<<(std::ostream& strm, const Printable<T>& p) {
+  static_assert(!std::is_pointer<std::decay_t<T>>(), "");
+  return strm << p.value;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<StringView>& p) {
+  Quote(strm, p.value.ptr, p.value.ptr + p.value.len);
+  return strm;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<std::string>& p) {
+  Quote(strm, p.value.data(), p.value.data() + p.value.size());
+  return strm;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<const char*>& p) {
+  Quote(strm, p.value, p.value ? p.value + std::strlen(p.value) : nullptr);
+  return strm;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<char*>& p) {
+  Quote(strm, p.value, p.value ? p.value + std::strlen(p.value) : nullptr);
+  return strm;
+}
+
+template <class T, class U>
+std::ostream& operator<<(std::ostream& strm, const Printable<std::pair<T, U>>& p) {
+  return strm << '{' << Print(p.value.first) << ", " << Print(p.value.second) << '}';
+}
+
+template <class T>
+std::ostream& operator<<(std::ostream& strm, const Printable<std::vector<T>>& p) {
+  strm << '[';
+  for (size_t i = 0; i != p.value.size(); ++i) {
+    if (i) strm << ", ";
+    strm << Print(p.value[i]);
+  }
+  strm << ']';
+  return strm;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<struct timespec>& p) {
+  strm << p.value.tv_sec << '.' << std::setw(9) << std::setfill('0') << p.value.tv_nsec;
+  return strm;
+}
+
+inline std::ostream& operator<<(std::ostream& strm, const Printable<git_index_time>& p) {
+  strm << p.value.seconds << '.' << std::setw(9) << std::setfill('0') << p.value.nanoseconds;
+  return strm;
+}
+
+}  // namespace gitstatus
+
+#endif  // ROMKATV_GITSTATUS_PRINT_H_