Updated utf8 dependency to upstream v3.2.3

1 files changed, 61 insertions, 32 deletions

diff --git a/src/utf8/unchecked.h b/src/utf8/unchecked.h
index cb24271..8fe83c9 100644
--- a/src/utf8/unchecked.h
+++ b/src/utf8/unchecked.h
@@ -32,29 +32,52 @@ DEALINGS IN THE SOFTWARE.
 
 namespace utf8
 {
-    namespace unchecked 
+    namespace unchecked
     {
         template <typename octet_iterator>
         octet_iterator append(uint32_t cp, octet_iterator result)
         {
-            if (cp < 0x80)                        // one octet
-                *(result++) = static_cast<uint8_t>(cp);  
-            else if (cp < 0x800) {                // two octets
-                *(result++) = static_cast<uint8_t>((cp >> 6)          | 0xc0);
-                *(result++) = static_cast<uint8_t>((cp & 0x3f)        | 0x80);
-            }
-            else if (cp < 0x10000) {              // three octets
-                *(result++) = static_cast<uint8_t>((cp >> 12)         | 0xe0);
-                *(result++) = static_cast<uint8_t>(((cp >> 6) & 0x3f) | 0x80);
-                *(result++) = static_cast<uint8_t>((cp & 0x3f)        | 0x80);
-            }
-            else {                                // four octets
-                *(result++) = static_cast<uint8_t>((cp >> 18)         | 0xf0);
-                *(result++) = static_cast<uint8_t>(((cp >> 12) & 0x3f)| 0x80);
-                *(result++) = static_cast<uint8_t>(((cp >> 6) & 0x3f) | 0x80);
-                *(result++) = static_cast<uint8_t>((cp & 0x3f)        | 0x80);
+            return internal::append(cp, result);
+        }
+
+        template <typename octet_iterator, typename output_iterator>
+        output_iterator replace_invalid(octet_iterator start, octet_iterator end, output_iterator out, uint32_t replacement)
+        {
+            while (start != end) {
+                octet_iterator sequence_start = start;
+                internal::utf_error err_code = utf8::internal::validate_next(start, end);
+                switch (err_code) {
+                    case internal::UTF8_OK :
+                        for (octet_iterator it = sequence_start; it != start; ++it)
+                            *out++ = *it;
+                        break;
+                    case internal::NOT_ENOUGH_ROOM:
+                        out = utf8::unchecked::append (replacement, out);
+                        start = end;
+                        break;
+                    case internal::INVALID_LEAD:
+                        out = utf8::unchecked::append (replacement, out);
+                        ++start;
+                        break;
+                    case internal::INCOMPLETE_SEQUENCE:
+                    case internal::OVERLONG_SEQUENCE:
+                    case internal::INVALID_CODE_POINT:
+                        out = utf8::unchecked::append (replacement, out);
+                        ++start;
+                        // just one replacement mark for the sequence
+                        while (start != end && utf8::internal::is_trail(*start))
+                            ++start;
+                        break;
+                }
             }
-            return result;
+            return out;
+        }
+
+        template <typename octet_iterator, typename output_iterator>
+        inline output_iterator replace_invalid(octet_iterator start, octet_iterator end, output_iterator out)
+        {
+            static const uint32_t replacement_marker = utf8::internal::mask16(0xfffd);
+            return utf8::unchecked::replace_invalid(start, end, out, replacement_marker);
         }
 
         template <typename octet_iterator>
@@ -85,13 +108,13 @@ namespace utf8
                     break;
             }
             ++it;
-            return cp;        
+            return cp;
         }
 
         template <typename octet_iterator>
         uint32_t peek_next(octet_iterator it)
         {
-            return utf8::unchecked::next(it);    
+            return utf8::unchecked::next(it);
         }
 
         template <typename octet_iterator>
@@ -102,18 +125,19 @@ namespace utf8
             return utf8::unchecked::next(temp);
         }
 
-        // Deprecated in versions that include prior, but only for the sake of consistency (see utf8::previous)
-        template <typename octet_iterator>
-        inline uint32_t previous(octet_iterator& it)
-        {
-            return utf8::unchecked::prior(it);
-        }
-
         template <typename octet_iterator, typename distance_type>
         void advance (octet_iterator& it, distance_type n)
         {
-            for (distance_type i = 0; i < n; ++i)
-                utf8::unchecked::next(it);
+            const distance_type zero(0);
+            if (n < zero) {
+                // backward
+                for (distance_type i = n; i < zero; ++i)
+                    utf8::unchecked::prior(it);
+            } else {
+                // forward
+                for (distance_type i = zero; i < n; ++i)
+                    utf8::unchecked::next(it);
+            }
         }
 
         template <typename octet_iterator>
@@ -128,7 +152,7 @@ namespace utf8
 
         template <typename u16bit_iterator, typename octet_iterator>
         octet_iterator utf16to8 (u16bit_iterator start, u16bit_iterator end, octet_iterator result)
-        {       
+        {
             while (start != end) {
                 uint32_t cp = utf8::internal::mask16(*start++);
             // Take care of surrogate pairs first
@@ -138,7 +162,7 @@ namespace utf8
                 }
                 result = utf8::unchecked::append(cp, result);
             }
-            return result;         
+            return result;
         }
 
         template <typename u16bit_iterator, typename octet_iterator>
@@ -176,9 +200,14 @@ namespace utf8
 
         // The iterator class
         template <typename octet_iterator>
-          class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> { 
+          class iterator {
             octet_iterator it;
             public:
+            typedef uint32_t value_type;
+            typedef uint32_t* pointer;
+            typedef uint32_t& reference;
+            typedef std::ptrdiff_t difference_type;
+            typedef std::bidirectional_iterator_tag iterator_category;
             iterator () {}
             explicit iterator (const octet_iterator& octet_it): it(octet_it) {}
             // the default "big three" are OK