Move exceptions in a separate file.

This enables the user to use std::istream_iterator as the underlying iterator.

LICENSE

@@ -0,0 +1,23 @@
+Boost Software License - Version 1.0 - August 17th, 2003
+
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+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, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

src/utf8/checked.h

@@ -29,44 +29,12 @@ DEALINGS IN THE SOFTWARE.
 #define UTF8_FOR_CPP_CHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
 
 #include "core.h"
-#include <stdexcept>
+#include "exception.h"
+#include <cassert>
+#include <cstddef>
 
 namespace utf8
 {
-    // Base for the exceptions that may be thrown from the library
-    class exception : public ::std::exception {
-    };
-
-    // Exceptions that may be thrown from the library functions.
-    class invalid_code_point : public exception {
-        uint32_t cp;
-    public:
-        invalid_code_point(uint32_t cp) : cp(cp) {}
-        virtual const char* what() const throw() { return "Invalid code point"; }
-        uint32_t code_point() const {return cp;}
-    };
-
-    class invalid_utf8 : public exception {
-        uint8_t u8;
-    public:
-        invalid_utf8 (uint8_t u) : u8(u) {}
-        virtual const char* what() const throw() { return "Invalid UTF-8"; }
-        uint8_t utf8_octet() const {return u8;}
-    };
-
-    class invalid_utf16 : public exception {
-        uint16_t u16;
-    public:
-        invalid_utf16 (uint16_t u) : u16(u) {}
-        virtual const char* what() const throw() { return "Invalid UTF-16"; }
-        uint16_t utf16_word() const {return u16;}
-    };
-
-    class not_enough_room : public exception {
-    public:
-        virtual const char* what() const throw() { return "Not enough space"; }
-    };
-
     /// The library API - functions intended to be called by the users
 
     template <typename octet_iterator>
@@ -263,9 +231,53 @@ namespace utf8
         return result;
     }
 
+	// Error policies for the iterator class
+    template <typename I>
+    class ErrorPolicyThrow {
+      public:
+      static void check_in_range(const I& it, const I& range_start, const I& range_end)
+	  {
+          if (it < range_start || it > range_end)
+              throw std::out_of_range("Invalid utf-8 iterator position");
+      }
+      static void check_same_range(const I& range_start_a, const I& range_start_b, const I& range_end_a, const I& range_end_b)
+	  {
+          if (range_start_a != range_start_b || range_end_a != range_end_b)
+              throw std::logic_error("Comparing utf-8 iterators defined with different ranges");
+      }
+    };
+    template <typename I>
+    class ErrorPolicyAssert {
+      public:
+      static void check_in_range(const I& it, const I& range_start, const I& range_end)
+	  {
+#if defined(NDEBUG)
+          (void)it;
+          (void)range_start;
+          (void)range_end;
+#else
+		  assert(it >= range_start && it <= range_end);
+#endif
+      }
+      static void check_same_range(const I& range_start_a, const I& range_start_b, const I& range_end_a, const I& range_end_b)
+	  {
+#if defined(NDEBUG)
+          (void)range_start_a;
+          (void)range_start_b;
+          (void)range_end_a;
+          (void)range_end_b;
+#else
+          assert(range_start_a == range_start_b && range_end_a == range_end_b);
+#endif
+      }
+    };
+
     // The iterator class
-    template <typename octet_iterator>
-    class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
+    template <
+		typename octet_iterator,
+		typename error_policy=ErrorPolicyThrow<octet_iterator>
+	>
+    class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t, std::ptrdiff_t, uint32_t*, uint32_t> {
       octet_iterator it;
       octet_iterator range_start;
       octet_iterator range_end;
@@ -276,8 +288,7 @@ namespace utf8
                          const octet_iterator& range_end) :
                it(octet_it), range_start(range_start), range_end(range_end)
       {
-          if (it < range_start || it > range_end)
-              throw std::out_of_range("Invalid utf-8 iterator position");
+          error_policy::check_in_range(it, range_start, range_end);
       }
       // the default "big three" are OK
       octet_iterator base () const { return it; }
@@ -288,8 +299,7 @@ namespace utf8
       }
       bool operator == (const iterator& rhs) const
       {
-          if (range_start != rhs.range_start || range_end != rhs.range_end)
-              throw std::logic_error("Comparing utf-8 iterators defined with different ranges");
+          error_policy::check_same_range(range_start, rhs.range_start, range_end, rhs.range_end);
           return (it == rhs.it);
       }
       bool operator != (const iterator& rhs) const
@@ -323,5 +333,3 @@ namespace utf8
 } // namespace utf8
 
 #endif //header guard
-
-

src/utf8/exception.h

@@ -0,0 +1,68 @@
+// Copyright 2006 Nemanja Trifunovic
+
+/*
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+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, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef id71B1E0983F3D4F7BAD0C091C4569AB37
+#define id71B1E0983F3D4F7BAD0C091C4569AB37
+
+#include <stdexcept>
+
+namespace utf8 {
+	// Base for the exceptions that may be thrown from the library
+	class exception : public ::std::exception {
+	};
+
+	// Exceptions that may be thrown from the library functions.
+	class invalid_code_point : public exception {
+		uint32_t cp;
+	public:
+		invalid_code_point(uint32_t cp) : cp(cp) {}
+		virtual const char* what() const throw() { return "Invalid code point"; }
+		uint32_t code_point() const {return cp;}
+	};
+
+	class invalid_utf8 : public exception {
+		uint8_t u8;
+	public:
+		invalid_utf8 (uint8_t u) : u8(u) {}
+		virtual const char* what() const throw() { return "Invalid UTF-8"; }
+		uint8_t utf8_octet() const {return u8;}
+	};
+
+	class invalid_utf16 : public exception {
+		uint16_t u16;
+	public:
+		invalid_utf16 (uint16_t u) : u16(u) {}
+		virtual const char* what() const throw() { return "Invalid UTF-16"; }
+		uint16_t utf16_word() const {return u16;}
+	};
+
+	class not_enough_room : public exception {
+	public:
+		virtual const char* what() const throw() { return "Not enough space"; }
+	};
+} //namespace utf8
+
+#endif