Delete small_vector's OneBitMutex policy

[folly.git] / folly / Range.h

diff --git a/folly/Range.h b/folly/Range.h
index f692b75a04db51acf9c49f2e60aaac56d0e7266f..0043c703233eee1fa8e20a5d1b1473ca9d23967c 100644 (file)
--- a/folly/Range.h
+++ b/folly/Range.h
@@ -22,17 +22,17 @@
 
 #include "folly/Portability.h"
 #include "folly/FBString.h"
-#include <glog/logging.h>
 #include <algorithm>
+#include <boost/operators.hpp>
 #include <cstring>
+#include <glog/logging.h>
 #include <iosfwd>
-#include <string>
 #include <stdexcept>
+#include <string>
 #include <type_traits>
-#include <boost/operators.hpp>
 
-// libc++ doesn't provide this header
-#if !FOLLY_USE_LIBCPP
+// libc++ doesn't provide this header, nor does msvc
+#ifdef FOLLY_HAVE_BITS_CXXCONFIG_H
 // This file appears in two locations: inside fbcode and in the
 // libstdc++ source code (when embedding fbstring as std::string).
 // To aid in this schizophrenic use, two macros are defined in
@@ -174,6 +174,7 @@ public:
   // Works only for Range<const char*>
   /* implicit */ Range(const std::string& str)
       : b_(str.data()), e_(b_ + str.size()) {}
+
   // Works only for Range<const char*>
   Range(const std::string& str, std::string::size_type startFrom) {
     if (UNLIKELY(startFrom > str.size())) {
@@ -240,20 +241,59 @@ public:
   // direction.
   template <class OtherIter, typename std::enable_if<
       (std::is_same<Iter, const unsigned char*>::value &&
-       std::is_same<OtherIter, const char*>::value), int>::type = 0>
+       (std::is_same<OtherIter, const char*>::value ||
+        std::is_same<OtherIter, char*>::value)), int>::type = 0>
   /* implicit */ Range(const Range<OtherIter>& other)
     : b_(reinterpret_cast<const unsigned char*>(other.begin())),
       e_(reinterpret_cast<const unsigned char*>(other.end())) {
   }
 
+  template <class OtherIter, typename std::enable_if<
+      (std::is_same<Iter, unsigned char*>::value &&
+       std::is_same<OtherIter, char*>::value), int>::type = 0>
+  /* implicit */ Range(const Range<OtherIter>& other)
+    : b_(reinterpret_cast<unsigned char*>(other.begin())),
+      e_(reinterpret_cast<unsigned char*>(other.end())) {
+  }
+
   template <class OtherIter, typename std::enable_if<
       (std::is_same<Iter, const char*>::value &&
-       std::is_same<OtherIter, const unsigned char*>::value), int>::type = 0>
+       (std::is_same<OtherIter, const unsigned char*>::value ||
+        std::is_same<OtherIter, unsigned char*>::value)), int>::type = 0>
   explicit Range(const Range<OtherIter>& other)
     : b_(reinterpret_cast<const char*>(other.begin())),
       e_(reinterpret_cast<const char*>(other.end())) {
   }
 
+  template <class OtherIter, typename std::enable_if<
+      (std::is_same<Iter, char*>::value &&
+       std::is_same<OtherIter, unsigned char*>::value), int>::type = 0>
+  explicit Range(const Range<OtherIter>& other)
+    : b_(reinterpret_cast<char*>(other.begin())),
+      e_(reinterpret_cast<char*>(other.end())) {
+  }
+
+  // Allow implicit conversion from Range<From> to Range<To> if From is
+  // implicitly convertible to To.
+  template <class OtherIter, typename std::enable_if<
+     (!std::is_same<Iter, OtherIter>::value &&
+      std::is_convertible<OtherIter, Iter>::value), int>::type = 0>
+  /* implicit */ Range(const Range<OtherIter>& other)
+    : b_(other.begin()),
+      e_(other.end()) {
+  }
+
+  // Allow explicit conversion from Range<From> to Range<To> if From is
+  // explicitly convertible to To.
+  template <class OtherIter, typename std::enable_if<
+    (!std::is_same<Iter, OtherIter>::value &&
+     !std::is_convertible<OtherIter, Iter>::value &&
+     std::is_constructible<Iter, const OtherIter&>::value), int>::type = 0>
+  explicit Range(const Range<OtherIter>& other)
+    : b_(other.begin()),
+      e_(other.end()) {
+  }
+
   void clear() {
     b_ = Iter();
     e_ = Iter();
@@ -461,6 +501,19 @@ public:
     return find(c, pos);
   }
 
+  /**
+   * Determine whether the range contains the given subrange or item.
+   *
+   * Note: Call find() directly if the index is needed.
+   */
+  bool contains(const Range& other) const {
+    return find(other) != std::string::npos;
+  }
+
+  bool contains(const value_type& other) const {
+    return find(other) != std::string::npos;
+  }
+
   void swap(Range& rhs) {
     std::swap(b_, rhs.b_);
     std::swap(e_, rhs.e_);
@@ -522,10 +575,10 @@ public:
    *  folly::StringPiece s("sample string for split_next");
    *  auto p = s.split_step(' ');
    *
-   *  // prints "sample"
+   *  // prints "string for split_next"
    *  cout << s << endl;
    *
-   *  // prints "string for split_next"
+   *  // prints "sample"
    *  cout << p << endl;
    *
    * Example 2:
@@ -611,12 +664,30 @@ void swap(Range<T>& lhs, Range<T>& rhs) {
  * Create a range from two iterators, with type deduction.
  */
 template <class Iter>
-Range<Iter> makeRange(Iter first, Iter last) {
+Range<Iter> range(Iter first, Iter last) {
   return Range<Iter>(first, last);
 }
 
+/*
+ * Creates a range to reference the contents of a contiguous-storage container.
+ */
+// Use pointers for types with '.data()' member
+template <class Collection,
+          class T = typename std::remove_pointer<
+              decltype(std::declval<Collection>().data())>::type>
+Range<T*> range(Collection&& v) {
+  return Range<T*>(v.data(), v.data() + v.size());
+}
+
+template <class T, size_t n>
+Range<T*> range(T (&array)[n]) {
+  return Range<T*>(array, array + n);
+}
+
 typedef Range<const char*> StringPiece;
+typedef Range<char*> MutableStringPiece;
 typedef Range<const unsigned char*> ByteRange;
+typedef Range<unsigned char*> MutableByteRange;
 
 std::ostream& operator<<(std::ostream& os, const StringPiece& piece);
 
@@ -811,9 +882,18 @@ struct AsciiCaseSensitive {
   }
 };
 
+/**
+ * Check if two ascii characters are case insensitive equal.
+ * The difference between the lower/upper case characters are the 6-th bit.
+ * We also check they are alpha chars, in case of xor = 32.
+ */
 struct AsciiCaseInsensitive {
   bool operator()(char lhs, char rhs) const {
-    return toupper(lhs) == toupper(rhs);
+    char k = lhs ^ rhs;
+    if (k == 0) return true;
+    if (k != 32) return false;
+    k = lhs | rhs;
+    return (k >= 'a' && k <= 'z');
   }
 };