From 2dc481058998344b7f97721d47987be3ac053768 Mon Sep 17 00:00:00 2001
From: Li Jin <dragon-fly@qq.com>
Date: Wed, 5 Jul 2017 14:30:02 +0800
Subject: Learn PEGTL a little.

---
 MoonParser/slice.h | 157 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 MoonParser/slice.h

(limited to 'MoonParser/slice.h')

diff --git a/MoonParser/slice.h b/MoonParser/slice.h
new file mode 100644
index 0000000..60e0ae1
--- /dev/null
+++ b/MoonParser/slice.h
@@ -0,0 +1,157 @@
+/**
+ * Copyright (C) 2017, IppClub. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#pragma once
+
+#include <cassert>
+#include <cstring>
+#include <string>
+#include <list>
+
+namespace silly {
+
+namespace slice {
+// A Slice object wraps a "const char *" or a "const std::string&" but
+// without copying their contents.
+class Slice {
+ private:
+  struct TrustedInitTag {};
+  constexpr Slice(const char* s, size_t n, TrustedInitTag) : str_(s), len_(n) {}
+
+ public:
+  // implicit conversion from std::string to Slice
+  Slice(const std::string &s) : Slice(s.data(), s.size()) {}
+
+  Slice(const char *s) : Slice(s, s ? strlen(s) : 0) {}
+
+  Slice(const char *s, size_t n) : str_(s), len_(n) {}
+
+  Slice(std::pair<const char*,size_t> sp) : str_(sp.first), len_(sp.second) {}
+
+  constexpr Slice(std::nullptr_t p = nullptr) : str_(nullptr), len_(0) {}
+
+  operator std::string() const {
+  	return std::string(str_, len_);
+  }
+
+  const char &operator[](size_t n) const {
+    return str_[n];
+  }
+
+  size_t size() const {
+    return len_;
+  }
+
+  const char *rawData() const {
+    return str_;
+  }
+
+  std::string toString() const {
+    return std::string(str_, len_);
+  }
+
+  bool empty() const {
+    return len_ == 0;
+  }
+
+  // similar with std::string::compare
+  // http://en.cppreference.com/w/cpp/string/basic_string/compare
+  int compare(const Slice &rhs) const;
+
+  void skip(size_t n) {
+    assert(n <= len_);
+    str_ += n;
+    len_ -= n;
+  }
+
+  void copyTo(char *dest, bool appendEndingNull = true) const {
+    memcpy(dest, str_, len_);
+    if (appendEndingNull) {
+      dest[len_] = '\0';
+    }
+  }
+
+  Slice &trimSpace() {
+    assert(len_ > 0);
+    size_t start = 0, end = len_ - 1;
+    while (start < end && isspace(str_[start])) {
+      start++;
+    }
+    while (start < end && isspace(str_[end])) {
+      end--;
+    }
+    str_ += start;
+    len_ = end - start + 1;
+    return *this;
+  }
+
+  typedef const char *const_iterator;
+
+  const_iterator begin() const {
+    return str_;
+  }
+
+  const_iterator end() const {
+    return str_ + len_;
+  }
+
+  std::string getFilePath() const;
+  std::string getFileName() const;
+  std::string getFileExtension() const;
+  std::string toLower() const;
+  std::string toUpper() const;
+  std::list<Slice> split(const Slice& delimer) const;
+
+  static const std::string Empty;
+  static float stof(const Slice& str);
+  static int stoi(const Slice& str);
+
+  constexpr friend Slice operator"" _slice(const char* s, size_t n);
+ private:
+  const char *str_;
+  size_t len_;
+};
+
+inline Slice trimSpace(const Slice &s) {
+  Slice tmp = s;
+  return tmp.trimSpace();
+}
+
+inline bool operator==(const Slice &lhs, const Slice &rhs) {
+  return lhs.compare(rhs) == 0;
+}
+
+inline bool operator!=(const Slice &lhs, const Slice &rhs) {
+  return !(lhs == rhs);
+}
+
+inline std::string operator+(const std::string& lhs, const Slice &rhs) {
+  return lhs + rhs.toString();
+}
+
+constexpr Slice operator"" _slice(const char* s, size_t n) {
+	return Slice(s, n, Slice::TrustedInitTag{});
+}
+
+} // namespace slice
+
+}  // namespace silly
-- 
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