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-rw-r--r--src/utf8/checked.h86
-rw-r--r--src/utf8/core.h92
-rw-r--r--src/utf8/cpp11.h103
-rw-r--r--src/utf8/cpp17.h103
-rw-r--r--src/utf8/unchecked.h93
5 files changed, 381 insertions, 96 deletions
diff --git a/src/utf8/checked.h b/src/utf8/checked.h
index 1331155..512dcc2 100644
--- a/src/utf8/checked.h
+++ b/src/utf8/checked.h
@@ -1,4 +1,4 @@
-// Copyright 2006 Nemanja Trifunovic
+// Copyright 2006-2016 Nemanja Trifunovic
/*
Permission is hereby granted, free of charge, to any person or organization
@@ -41,8 +41,8 @@ namespace utf8
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"; }
+ invalid_code_point(uint32_t codepoint) : cp(codepoint) {}
+ virtual const char* what() const UTF_CPP_NOEXCEPT UTF_CPP_OVERRIDE { return "Invalid code point"; }
uint32_t code_point() const {return cp;}
};
@@ -50,7 +50,8 @@ namespace utf8
uint8_t u8;
public:
invalid_utf8 (uint8_t u) : u8(u) {}
- virtual const char* what() const throw() { return "Invalid UTF-8"; }
+ invalid_utf8 (char c) : u8(static_cast<uint8_t>(c)) {}
+ virtual const char* what() const UTF_CPP_NOEXCEPT UTF_CPP_OVERRIDE { return "Invalid UTF-8"; }
uint8_t utf8_octet() const {return u8;}
};
@@ -58,13 +59,13 @@ namespace utf8
uint16_t u16;
public:
invalid_utf16 (uint16_t u) : u16(u) {}
- virtual const char* what() const throw() { return "Invalid UTF-16"; }
+ virtual const char* what() const UTF_CPP_NOEXCEPT UTF_CPP_OVERRIDE { 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"; }
+ virtual const char* what() const UTF_CPP_NOEXCEPT UTF_CPP_OVERRIDE { return "Not enough space"; }
};
/// The library API - functions intended to be called by the users
@@ -75,24 +76,7 @@ namespace utf8
if (!utf8::internal::is_code_point_valid(cp))
throw invalid_code_point(cp);
- 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 result;
+ return internal::append(cp, result);
}
template <typename octet_iterator, typename output_iterator>
@@ -107,7 +91,9 @@ namespace utf8
*out++ = *it;
break;
case internal::NOT_ENOUGH_ROOM:
- throw not_enough_room();
+ out = utf8::append (replacement, out);
+ start = end;
+ break;
case internal::INVALID_LEAD:
out = utf8::append (replacement, out);
++start;
@@ -146,7 +132,7 @@ namespace utf8
case internal::INVALID_LEAD :
case internal::INCOMPLETE_SEQUENCE :
case internal::OVERLONG_SEQUENCE :
- throw invalid_utf8(*it);
+ throw invalid_utf8(static_cast<uint8_t>(*it));
case internal::INVALID_CODE_POINT :
throw invalid_code_point(cp);
}
@@ -174,23 +160,19 @@ namespace utf8
return utf8::peek_next(it, end);
}
- /// Deprecated in versions that include "prior"
- template <typename octet_iterator>
- uint32_t previous(octet_iterator& it, octet_iterator pass_start)
- {
- octet_iterator end = it;
- while (utf8::internal::is_trail(*(--it)))
- if (it == pass_start)
- throw invalid_utf8(*it); // error - no lead byte in the sequence
- octet_iterator temp = it;
- return utf8::next(temp, end);
- }
-
template <typename octet_iterator, typename distance_type>
void advance (octet_iterator& it, distance_type n, octet_iterator end)
{
- for (distance_type i = 0; i < n; ++i)
- utf8::next(it, end);
+ const distance_type zero(0);
+ if (n < zero) {
+ // backward
+ for (distance_type i = n; i < zero; ++i)
+ utf8::prior(it, end);
+ } else {
+ // forward
+ for (distance_type i = zero; i < n; ++i)
+ utf8::next(it, end);
+ }
}
template <typename octet_iterator>
@@ -233,7 +215,7 @@ namespace utf8
template <typename u16bit_iterator, typename octet_iterator>
u16bit_iterator utf8to16 (octet_iterator start, octet_iterator end, u16bit_iterator result)
{
- while (start != end) {
+ while (start < end) {
uint32_t cp = utf8::next(start, end);
if (cp > 0xffff) { //make a surrogate pair
*result++ = static_cast<uint16_t>((cp >> 10) + internal::LEAD_OFFSET);
@@ -257,7 +239,7 @@ namespace utf8
template <typename octet_iterator, typename u32bit_iterator>
u32bit_iterator utf8to32 (octet_iterator start, octet_iterator end, u32bit_iterator result)
{
- while (start != end)
+ while (start < end)
(*result++) = utf8::next(start, end);
return result;
@@ -265,16 +247,21 @@ 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;
octet_iterator range_start;
octet_iterator range_end;
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,
- const octet_iterator& range_start,
- const octet_iterator& range_end) :
- it(octet_it), range_start(range_start), range_end(range_end)
+ const octet_iterator& rangestart,
+ const octet_iterator& rangeend) :
+ it(octet_it), range_start(rangestart), range_end(rangeend)
{
if (it < range_start || it > range_end)
throw std::out_of_range("Invalid utf-8 iterator position");
@@ -322,6 +309,11 @@ namespace utf8
} // namespace utf8
-#endif //header guard
+#if UTF_CPP_CPLUSPLUS >= 201703L // C++ 17 or later
+#include "cpp17.h"
+#elif UTF_CPP_CPLUSPLUS >= 201103L // C++ 11 or later
+#include "cpp11.h"
+#endif // C++ 11 or later
+#endif //header guard
diff --git a/src/utf8/core.h b/src/utf8/core.h
index 693d388..34371ee 100644
--- a/src/utf8/core.h
+++ b/src/utf8/core.h
@@ -30,6 +30,23 @@ DEALINGS IN THE SOFTWARE.
#include <iterator>
+// Determine the C++ standard version.
+// If the user defines UTF_CPP_CPLUSPLUS, use that.
+// Otherwise, trust the unreliable predefined macro __cplusplus
+
+#if !defined UTF_CPP_CPLUSPLUS
+ #define UTF_CPP_CPLUSPLUS __cplusplus
+#endif
+
+#if UTF_CPP_CPLUSPLUS >= 201103L // C++ 11 or later
+ #define UTF_CPP_OVERRIDE override
+ #define UTF_CPP_NOEXCEPT noexcept
+#else // C++ 98/03
+ #define UTF_CPP_OVERRIDE
+ #define UTF_CPP_NOEXCEPT throw()
+#endif // C++ 11 or later
+
+
namespace utf8
{
// The typedefs for 8-bit, 16-bit and 32-bit unsigned integers
@@ -49,8 +66,8 @@ namespace internal
const uint16_t LEAD_SURROGATE_MAX = 0xdbffu;
const uint16_t TRAIL_SURROGATE_MIN = 0xdc00u;
const uint16_t TRAIL_SURROGATE_MAX = 0xdfffu;
- const uint16_t LEAD_OFFSET = LEAD_SURROGATE_MIN - (0x10000 >> 10);
- const uint32_t SURROGATE_OFFSET = 0x10000u - (LEAD_SURROGATE_MIN << 10) - TRAIL_SURROGATE_MIN;
+ const uint16_t LEAD_OFFSET = 0xd7c0u; // LEAD_SURROGATE_MIN - (0x10000 >> 10)
+ const uint32_t SURROGATE_OFFSET = 0xfca02400u; // 0x10000u - (LEAD_SURROGATE_MIN << 10) - TRAIL_SURROGATE_MIN
// Maximum valid value for a Unicode code point
const uint32_t CODE_POINT_MAX = 0x0010ffffu;
@@ -142,7 +159,7 @@ namespace internal
if (!utf8::internal::is_trail(*it))
return INCOMPLETE_SEQUENCE;
-
+
return UTF8_OK;
}
@@ -165,7 +182,7 @@ namespace internal
{
if (it == end)
return NOT_ENOUGH_ROOM;
-
+
code_point = utf8::internal::mask8(*it);
UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
@@ -222,6 +239,9 @@ namespace internal
template <typename octet_iterator>
utf_error validate_next(octet_iterator& it, octet_iterator end, uint32_t& code_point)
{
+ if (it == end)
+ return NOT_ENOUGH_ROOM;
+
// Save the original value of it so we can go back in case of failure
// Of course, it does not make much sense with i.e. stream iterators
octet_iterator original_it = it;
@@ -234,7 +254,7 @@ namespace internal
// Get trail octets and calculate the code point
utf_error err = UTF8_OK;
switch (length) {
- case 0:
+ case 0:
return INVALID_LEAD;
case 1:
err = utf8::internal::get_sequence_1(it, end, cp);
@@ -277,6 +297,55 @@ namespace internal
return utf8::internal::validate_next(it, end, ignored);
}
+ // Internal implementation of both checked and unchecked append() function
+ // This function will be invoked by the overloads below, as they will know
+ // the octet_type.
+ template <typename octet_iterator, typename octet_type>
+ octet_iterator append(uint32_t cp, octet_iterator result) {
+ if (cp < 0x80) // one octet
+ *(result++) = static_cast<octet_type>(cp);
+ else if (cp < 0x800) { // two octets
+ *(result++) = static_cast<octet_type>((cp >> 6) | 0xc0);
+ *(result++) = static_cast<octet_type>((cp & 0x3f) | 0x80);
+ }
+ else if (cp < 0x10000) { // three octets
+ *(result++) = static_cast<octet_type>((cp >> 12) | 0xe0);
+ *(result++) = static_cast<octet_type>(((cp >> 6) & 0x3f) | 0x80);
+ *(result++) = static_cast<octet_type>((cp & 0x3f) | 0x80);
+ }
+ else { // four octets
+ *(result++) = static_cast<octet_type>((cp >> 18) | 0xf0);
+ *(result++) = static_cast<octet_type>(((cp >> 12) & 0x3f)| 0x80);
+ *(result++) = static_cast<octet_type>(((cp >> 6) & 0x3f) | 0x80);
+ *(result++) = static_cast<octet_type>((cp & 0x3f) | 0x80);
+ }
+ return result;
+ }
+
+ // One of the following overloads will be invoked from the API calls
+
+ // A simple (but dangerous) case: the caller appends byte(s) to a char array
+ inline char* append(uint32_t cp, char* result) {
+ return append<char*, char>(cp, result);
+ }
+
+ // Hopefully, most common case: the caller uses back_inserter
+ // i.e. append(cp, std::back_inserter(str));
+ template<typename container_type>
+ std::back_insert_iterator<container_type> append
+ (uint32_t cp, std::back_insert_iterator<container_type> result) {
+ return append<std::back_insert_iterator<container_type>,
+ typename container_type::value_type>(cp, result);
+ }
+
+ // The caller uses some other kind of output operator - not covered above
+ // Note that in this case we are not able to determine octet_type
+ // so we assume it's uint_8; that can cause a conversion warning if we are wrong.
+ template <typename octet_iterator>
+ octet_iterator append(uint32_t cp, octet_iterator result) {
+ return append<octet_iterator, uint8_t>(cp, result);
+ }
+
} // namespace internal
/// The library API - functions intended to be called by the users
@@ -310,18 +379,7 @@ namespace internal
((it != end) && (utf8::internal::mask8(*it++)) == bom[1]) &&
((it != end) && (utf8::internal::mask8(*it)) == bom[2])
);
- }
-
- //Deprecated in release 2.3
- template <typename octet_iterator>
- inline bool is_bom (octet_iterator it)
- {
- return (
- (utf8::internal::mask8(*it++)) == bom[0] &&
- (utf8::internal::mask8(*it++)) == bom[1] &&
- (utf8::internal::mask8(*it)) == bom[2]
- );
- }
+ }
} // namespace utf8
#endif // header guard
diff --git a/src/utf8/cpp11.h b/src/utf8/cpp11.h
new file mode 100644
index 0000000..2366f12
--- /dev/null
+++ b/src/utf8/cpp11.h
@@ -0,0 +1,103 @@
+// Copyright 2018 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 UTF8_FOR_CPP_a184c22c_d012_11e8_a8d5_f2801f1b9fd1
+#define UTF8_FOR_CPP_a184c22c_d012_11e8_a8d5_f2801f1b9fd1
+
+#include "checked.h"
+#include <string>
+
+namespace utf8
+{
+
+ inline void append(char32_t cp, std::string& s)
+ {
+ append(uint32_t(cp), std::back_inserter(s));
+ }
+
+ inline std::string utf16to8(const std::u16string& s)
+ {
+ std::string result;
+ utf16to8(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::u16string utf8to16(const std::string& s)
+ {
+ std::u16string result;
+ utf8to16(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::string utf32to8(const std::u32string& s)
+ {
+ std::string result;
+ utf32to8(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::u32string utf8to32(const std::string& s)
+ {
+ std::u32string result;
+ utf8to32(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::size_t find_invalid(const std::string& s)
+ {
+ std::string::const_iterator invalid = find_invalid(s.begin(), s.end());
+ return (invalid == s.end()) ? std::string::npos : static_cast<std::size_t>(invalid - s.begin());
+ }
+
+ inline bool is_valid(const std::string& s)
+ {
+ return is_valid(s.begin(), s.end());
+ }
+
+ inline std::string replace_invalid(const std::string& s, char32_t replacement)
+ {
+ std::string result;
+ replace_invalid(s.begin(), s.end(), std::back_inserter(result), replacement);
+ return result;
+ }
+
+ inline std::string replace_invalid(const std::string& s)
+ {
+ std::string result;
+ replace_invalid(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline bool starts_with_bom(const std::string& s)
+ {
+ return starts_with_bom(s.begin(), s.end());
+ }
+
+} // namespace utf8
+
+#endif // header guard
+
diff --git a/src/utf8/cpp17.h b/src/utf8/cpp17.h
new file mode 100644
index 0000000..32a77ce
--- /dev/null
+++ b/src/utf8/cpp17.h
@@ -0,0 +1,103 @@
+// Copyright 2018 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 UTF8_FOR_CPP_7e906c01_03a3_4daf_b420_ea7ea952b3c9
+#define UTF8_FOR_CPP_7e906c01_03a3_4daf_b420_ea7ea952b3c9
+
+#include "checked.h"
+#include <string>
+
+namespace utf8
+{
+
+ inline void append(char32_t cp, std::string& s)
+ {
+ append(uint32_t(cp), std::back_inserter(s));
+ }
+
+ inline std::string utf16to8(std::u16string_view s)
+ {
+ std::string result;
+ utf16to8(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::u16string utf8to16(std::string_view s)
+ {
+ std::u16string result;
+ utf8to16(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::string utf32to8(std::u32string_view s)
+ {
+ std::string result;
+ utf32to8(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::u32string utf8to32(std::string_view s)
+ {
+ std::u32string result;
+ utf8to32(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline std::size_t find_invalid(std::string_view s)
+ {
+ std::string_view::const_iterator invalid = find_invalid(s.begin(), s.end());
+ return (invalid == s.end()) ? std::string_view::npos : static_cast<std::size_t>(invalid - s.begin());
+ }
+
+ inline bool is_valid(std::string_view s)
+ {
+ return is_valid(s.begin(), s.end());
+ }
+
+ inline std::string replace_invalid(std::string_view s, char32_t replacement)
+ {
+ std::string result;
+ replace_invalid(s.begin(), s.end(), std::back_inserter(result), replacement);
+ return result;
+ }
+
+ inline std::string replace_invalid(std::string_view s)
+ {
+ std::string result;
+ replace_invalid(s.begin(), s.end(), std::back_inserter(result));
+ return result;
+ }
+
+ inline bool starts_with_bom(std::string_view s)
+ {
+ return starts_with_bom(s.begin(), s.end());
+ }
+
+} // namespace utf8
+
+#endif // header guard
+
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 05:52:00 +0000