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-rw-r--r--src/charset-test.cpp57
-rw-r--r--src/charset.h104
-rw-r--r--src/mot-encoder.cpp98
-rw-r--r--src/utf8.h34
-rw-r--r--src/utf8/checked.h327
-rw-r--r--src/utf8/core.h329
-rw-r--r--src/utf8/unchecked.h228
7 files changed, 1135 insertions, 42 deletions
diff --git a/src/charset-test.cpp b/src/charset-test.cpp
new file mode 100644
index 0000000..d65fcc7
--- /dev/null
+++ b/src/charset-test.cpp
@@ -0,0 +1,57 @@
+/*
+ Copyright (C) 2015 Matthias P. Braendli (http://opendigitalradio.org)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ charset.cpp
+ This is test code for the character set conversion. It does not
+ get compiled by default.
+ Please use
+ g++ -Wall -Wextra -std=c++11 -o charset-test charset-test.cpp
+ to compile this, and create a input.txt file with test data.
+
+ Authors:
+ Matthias P. Braendli <matthias@mpb.li>
+*/
+
+#include "charset.h"
+#include <iostream>
+#include <fstream>
+
+#include <cstdio>
+
+using namespace std;
+
+int main(int argc, char** argv)
+{
+ string test_file_path("input.txt");
+
+ ifstream fs8(test_file_path);
+ if (!fs8.is_open()) {
+ cerr << "Could not open " << test_file_path << endl;
+ return 1;
+ }
+
+ CharsetConverter conv;
+
+ string line;
+ // Play with all the lines in the file
+ while (getline(fs8, line)) {
+ cout << conv.convert(line) << endl;
+ }
+
+ return 0;
+}
+
+
diff --git a/src/charset.h b/src/charset.h
new file mode 100644
index 0000000..0eb1edf
--- /dev/null
+++ b/src/charset.h
@@ -0,0 +1,104 @@
+/*
+ Copyright (C) 2015 Matthias P. Braendli (http://opendigitalradio.org)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ charset.h
+ Define the EBU charsets for DLS encoding
+
+ Authors:
+ Matthias P. Braendli <matthias@mpb.li>
+*/
+
+#ifndef __CHARSET_H_
+#define __CHARSET_H_
+
+#include "utf8.h"
+#include <string>
+#include <vector>
+#include <algorithm>
+
+// The first 32 entries are control characters and are not specified in
+// the table.
+#define CHARSET_TABLE_OFFSET 32
+#define CHARSET_TABLE_ENTRIES (255 - CHARSET_TABLE_OFFSET)
+const char* utf8_encoded_EBU_Latin[CHARSET_TABLE_ENTRIES] = {
+" ", "!", "\"","#", "¤", "%", "&", "'", "(", ")", "*", "+", ",", "-", ".", "/",
+"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ":", ";", "<", "=", ">", "?",
+"@", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O",
+"P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "[", "\\","]", "—", "_",
+"‖", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o",
+"p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "{", "|", "}", "⎺", " ",
+"á", "à", "é", "è", "í", "ì", "ó", "ò", "ú", "ù", "Ñ", "Ç", "Ş", "ß", "¡", "IJ",
+"â", "ä", "ê", "ë", "î", "ï", "ô", "ö", "û", "ü", "ñ", "ç", "ş", "ǧ", "ı", "ij",
+"ª", "α", "©", "‰", "Ǧ", "ě", "ň", "ő", "π", "€", "£", "$", "←", "↑", "→", "↓",
+"º", "¹", "²", "³", "±", "İ", "ń", "ű", "μ", "¿", "÷", "°", "¼", "½", "¾", "§",
+"Á", "À", "Ê", "È", "Í", "Ì", "Ó", "Ò", "Ú", "Ù", "Ř", "Č", "Š", "Ž", "Ð", "Ŀ",
+"Â", "Ä", "Ê", "Ë", "Î", "Ï", "Ô", "Ö", "Û", "Ü", "ř", "č", "š", "ž", "đ", "ŀ",
+"Ã", "Å", "Æ", "Œ", "ŷ", "Ý", "Õ", "Ø", "Þ", "Ŋ", "Ŕ", "Ć", "Ś", "Ź", "∓", "ð",
+"ã", "å", "æ", "œ", "ŵ", "ý", "õ", "ø", "þ", "ŋ", "ŕ", "ć", "ś", "ź", "ł"};
+
+class CharsetConverter
+{
+ public:
+ CharsetConverter() {
+ /* Build the converstion table that contains the known code points,
+ * at the indices corresponding to the EBU Latin table
+ */
+ using namespace std;
+ for (size_t i = 0; i < CHARSET_TABLE_ENTRIES; i++) {
+ string table_entry(utf8_encoded_EBU_Latin[i]);
+ string::iterator it = table_entry.begin();
+ uint32_t code_point = utf8::next(it, table_entry.end());
+ m_conversion_table.push_back(code_point);
+ }
+ }
+
+ /* Convert a UTF-8 encoded text line into a EBU Latin 1 encoded byte stream
+ */
+ std::string convert(std::string line_utf8) {
+ using namespace std;
+
+ // check for invalid utf-8, we only convert up to the first error
+ string::iterator end_it = utf8::find_invalid(line_utf8.begin(), line_utf8.end());
+
+ // Convert it to utf-32
+ vector<uint32_t> utf32line;
+ utf8::utf8to32(line_utf8.begin(), end_it, back_inserter(utf32line));
+
+ string encoded_line(utf32line.size(), '0');
+
+ // Try to convert each codepoint
+ for (size_t i = 0; i < utf32line.size(); i++) {
+ vector<uint32_t>::iterator iter = find(m_conversion_table.begin(),
+ m_conversion_table.end(), utf32line[i]);
+ if (iter != m_conversion_table.end()) {
+ size_t index = std::distance(m_conversion_table.begin(), iter);
+
+ encoded_line[i] = (char)(index + CHARSET_TABLE_OFFSET);
+ }
+ else {
+ encoded_line[i] = ' ';
+ }
+ }
+ return encoded_line;
+ }
+
+ private:
+
+ std::vector<uint32_t> m_conversion_table;
+};
+
+#endif
+
diff --git a/src/mot-encoder.cpp b/src/mot-encoder.cpp
index 8422514..6ddfcb8 100644
--- a/src/mot-encoder.cpp
+++ b/src/mot-encoder.cpp
@@ -1,7 +1,7 @@
/*
Copyright (C) 2014 CSP Innovazione nelle ICT s.c.a r.l. (http://rd.csp.it/)
- Copyright (C) 2014 Matthias P. Braendli (http://opendigitalradio.org)
+ Copyright (C) 2014, 2015 Matthias P. Braendli (http://opendigitalradio.org)
Copyright (C) 2015 Stefan Pöschel (http://opendigitalradio.org)
@@ -33,6 +33,10 @@
#include <unistd.h>
#include <cstring>
#include <string>
+#include <sstream>
+#include <iostream>
+#include <fstream>
+#include <algorithm>
#include <vector>
#include <deque>
#include <list>
@@ -43,6 +47,7 @@
#include <wand/magick_wand.h>
#include <getopt.h>
#include "config.h"
+#include "charset.h"
#define DEBUG 0
@@ -225,8 +230,8 @@ void writeMotPAD(int output_fd,
unsigned short int mscdgsize,
unsigned short int padlen);
-void create_dls_pads(const char* text, const int padlen, const uint8_t charset);
-void writeDLS(int output_fd, const char* dls_file, int padlen, uint8_t charset);
+void create_dls_pads(const std::string& text, const int padlen, const uint8_t charset);
+void writeDLS(int output_fd, const std::string& dls_file, int padlen, uint8_t charset);
int get_xpadlengthmask(int padlen);
@@ -247,10 +252,12 @@ static int cindex_body = 0;
#define DLS_SEG_LEN_CRC 2
#define DLS_SEG_LEN_MAX (DLS_SEG_LEN_PREFIX + DLS_SEG_LEN_CHAR_MAX + DLS_SEG_LEN_CRC)
+CharsetConverter charset_converter;
+
typedef std::vector<uint8_t> pad_t;
static std::deque<pad_t> dls_pads;
static bool dls_toggle = false;
-static char dlstext_prev[MAXDLS + 1];
+std::string dlstext_prev(MAXDLS + 1, ' ');
static int verbose = 0;
@@ -311,7 +318,7 @@ int main(int argc, char *argv[])
const char* dir = NULL;
const char* output = "/tmp/pad.fifo";
- const char* dls_file = NULL;
+ std::string dls_file;
const struct option longopts[] = {
{"charset", required_argument, 0, 'c'},
@@ -377,17 +384,17 @@ int main(int argc, char *argv[])
return 1;
}
- if (dir && dls_file) {
+ if (dir && not dls_file.empty()) {
fprintf(stderr, "mot-encoder encoding Slideshow from %s and DLS from %s to %s\n",
- dir, dls_file, output);
+ dir, dls_file.c_str(), output);
}
else if (dir) {
fprintf(stderr, "mot-encoder encoding Slideshow from %s to %s. No DLS.\n",
dir, output);
}
- else if (dls_file) {
+ else if (not dls_file.empty()) {
fprintf(stderr, "mot-encoder encoding DLS from %s to %s. No Slideshow.\n",
- dls_file, output);
+ dls_file.c_str(), output);
}
else {
fprintf(stderr, "mot-encoder Error: No DLS nor slideshow to encode !\n");
@@ -471,7 +478,7 @@ int main(int argc, char *argv[])
// Sort the list in fidx order
slides_to_transmit.sort();
- if (dls_file) {
+ if (not dls_file.empty()) {
// Maybe we have no slides, always update DLS
writeDLS(output_fd, dls_file, padlen, charset);
sleep(sleepdelay);
@@ -496,7 +503,7 @@ int main(int argc, char *argv[])
}
// Always retransmit DLS after each slide, we want it to be updated frequently
- if (dls_file) {
+ if (not dls_file.empty()) {
writeDLS(output_fd, dls_file, padlen, charset);
}
@@ -509,7 +516,7 @@ int main(int argc, char *argv[])
slides_to_transmit.resize(0);
}
- else if (dls_file) { // only DLS
+ else if (not dls_file.empty()) { // only DLS
// Always retransmit DLS, we want it to be updated frequently
writeDLS(output_fd, dls_file, padlen, charset);
@@ -893,58 +900,65 @@ void packMscDG(unsigned char* b, MSCDG* msc, unsigned short int* bsize)
}
-void writeDLS(int output_fd, const char* dls_file, int padlen, uint8_t charset)
+void writeDLS(int output_fd, const std::string& dls_file, int padlen, uint8_t charset)
{
- char dlstext[MAXDLS + 1];
- int dlslen;
- int i;
- bool dlstext_new;
-
- int dlsfd = open(dls_file, O_RDONLY);
- if (dlsfd == -1) {
- fprintf(stderr, "mot-encoder Error: Cannot open dls file\n");
+ std::ifstream dls_fstream(dls_file.c_str());
+ if (!dls_fstream.is_open()) {
+ std::cerr << "Could not open " << dls_file << std::endl;
return;
}
- dlslen = read(dlsfd, dlstext, MAXDLS);
+ std::vector<std::string> dls_lines;
- close(dlsfd);
-
- dlstext[dlslen] = 0x00;
+ std::string line;
+ // Read and convert lines one by one because the converter doesn't understand
+ // line endings
+ while (std::getline(dls_fstream, line)) {
+ if (not line.empty()) {
+ if (charset == CHARSET_COMPLETE_EBU_LATIN) {
+ dls_lines.push_back(charset_converter.convert(line));
+ }
+ else {
+ dls_lines.push_back(line);
+ }
+ // TODO handle the other charsets accordingly
+ }
+ }
- // Remove trailing line breaks from the file
- char* endp = dlstext + dlslen;
- while ( endp > dlstext &&
- (*endp == '\0' || *endp == '\n')) {
- if (*endp == '\n') {
- *endp = '\0';
+ std::stringstream ss;
+ for (size_t i = 0; i < dls_lines.size(); i++) {
+ if (i != 0) {
+ ss << "\n";
}
- endp--;
+ ss << dls_lines[i];
}
+ std::string dlstext = ss.str();
+ using namespace std;
+
// (Re)Create data groups (and thereby toggle the toggle bit) only on (first call or) new text
- dlstext_new = dls_pads.empty() || strcmp(dlstext, dlstext_prev);
+ bool dlstext_is_new = dls_pads.empty() || (dlstext != dlstext_prev);
if (verbose) {
- fprintf(stderr, "mot-encoder writing %s DLS text \"%s\"\n", dlstext_new ? "new" : "old", dlstext);
+ fprintf(stderr, "mot-encoder writing %s DLS text \"%s\"\n", dlstext_is_new ? "new" : "old", dlstext.c_str());
}
- if (dlstext_new) {
+ if (dlstext_is_new) {
create_dls_pads(dlstext, padlen, charset);
- strcpy(dlstext_prev, dlstext);
+ dlstext_prev = dlstext;
}
- for (i = 0; i < dls_pads.size(); i++) {
+ for (size_t i = 0; i < dls_pads.size(); i++) {
size_t dummy = write(output_fd, &dls_pads[i].front(), dls_pads[i].size());
}
}
-int dls_count(const char* text) {
- size_t text_len = strlen(text);
+int dls_count(const std::string& text) {
+ size_t text_len = text.size();
return text_len / DLS_SEG_LEN_CHAR_MAX + (text_len % DLS_SEG_LEN_CHAR_MAX ? 1 : 0);
}
-size_t dls_get(const char* text, const uint8_t charset, const unsigned int seg_index, uint8_t *seg_data) {
+size_t dls_get(const std::string& text, const uint8_t charset, const unsigned int seg_index, uint8_t *seg_data) {
int seg_count = dls_count(text);
if (seg_index >= seg_count)
return 0;
@@ -952,7 +966,7 @@ size_t dls_get(const char* text, const uint8_t charset, const unsigned int seg_i
bool first_seg = seg_index == 0;
bool last_seg = seg_index == seg_count - 1;
- const char *seg_text_start = text + seg_index * DLS_SEG_LEN_CHAR_MAX;
+ const char *seg_text_start = text.c_str() + seg_index * DLS_SEG_LEN_CHAR_MAX;
size_t seg_text_len = strnlen(seg_text_start, DLS_SEG_LEN_CHAR_MAX);
size_t seg_len = DLS_SEG_LEN_PREFIX + seg_text_len + DLS_SEG_LEN_CRC;
@@ -991,7 +1005,7 @@ size_t dls_get(const char* text, const uint8_t charset, const unsigned int seg_i
}
-void create_dls_pads(const char* text, const int padlen, const uint8_t charset) {
+void create_dls_pads(const std::string& text, const int padlen, const uint8_t charset) {
uint8_t seg_data[DLS_SEG_LEN_MAX];
int xpadlengthmask = get_xpadlengthmask(padlen);
diff --git a/src/utf8.h b/src/utf8.h
new file mode 100644
index 0000000..4e44514
--- /dev/null
+++ b/src/utf8.h
@@ -0,0 +1,34 @@
+// 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 UTF8_FOR_CPP_2675DCD0_9480_4c0c_B92A_CC14C027B731
+#define UTF8_FOR_CPP_2675DCD0_9480_4c0c_B92A_CC14C027B731
+
+#include "utf8/checked.h"
+#include "utf8/unchecked.h"
+
+#endif // header guard
diff --git a/src/utf8/checked.h b/src/utf8/checked.h
new file mode 100644
index 0000000..1331155
--- /dev/null
+++ b/src/utf8/checked.h
@@ -0,0 +1,327 @@
+// 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 UTF8_FOR_CPP_CHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+#define UTF8_FOR_CPP_CHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+
+#include "core.h"
+#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"; }
+ };
+
+ /// The library API - functions intended to be called by the users
+
+ template <typename octet_iterator>
+ octet_iterator append(uint32_t cp, octet_iterator result)
+ {
+ 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;
+ }
+
+ 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:
+ throw not_enough_room();
+ case internal::INVALID_LEAD:
+ out = utf8::append (replacement, out);
+ ++start;
+ break;
+ case internal::INCOMPLETE_SEQUENCE:
+ case internal::OVERLONG_SEQUENCE:
+ case internal::INVALID_CODE_POINT:
+ out = utf8::append (replacement, out);
+ ++start;
+ // just one replacement mark for the sequence
+ while (start != end && utf8::internal::is_trail(*start))
+ ++start;
+ break;
+ }
+ }
+ 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::replace_invalid(start, end, out, replacement_marker);
+ }
+
+ template <typename octet_iterator>
+ uint32_t next(octet_iterator& it, octet_iterator end)
+ {
+ uint32_t cp = 0;
+ internal::utf_error err_code = utf8::internal::validate_next(it, end, cp);
+ switch (err_code) {
+ case internal::UTF8_OK :
+ break;
+ case internal::NOT_ENOUGH_ROOM :
+ throw not_enough_room();
+ case internal::INVALID_LEAD :
+ case internal::INCOMPLETE_SEQUENCE :
+ case internal::OVERLONG_SEQUENCE :
+ throw invalid_utf8(*it);
+ case internal::INVALID_CODE_POINT :
+ throw invalid_code_point(cp);
+ }
+ return cp;
+ }
+
+ template <typename octet_iterator>
+ uint32_t peek_next(octet_iterator it, octet_iterator end)
+ {
+ return utf8::next(it, end);
+ }
+
+ template <typename octet_iterator>
+ uint32_t prior(octet_iterator& it, octet_iterator start)
+ {
+ // can't do much if it == start
+ if (it == start)
+ throw not_enough_room();
+
+ octet_iterator end = it;
+ // Go back until we hit either a lead octet or start
+ while (utf8::internal::is_trail(*(--it)))
+ if (it == start)
+ throw invalid_utf8(*it); // error - no lead byte in the sequence
+ 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);
+ }
+
+ template <typename octet_iterator>
+ typename std::iterator_traits<octet_iterator>::difference_type
+ distance (octet_iterator first, octet_iterator last)
+ {
+ typename std::iterator_traits<octet_iterator>::difference_type dist;
+ for (dist = 0; first < last; ++dist)
+ utf8::next(first, last);
+ return dist;
+ }
+
+ 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
+ if (utf8::internal::is_lead_surrogate(cp)) {
+ if (start != end) {
+ uint32_t trail_surrogate = utf8::internal::mask16(*start++);
+ if (utf8::internal::is_trail_surrogate(trail_surrogate))
+ cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET;
+ else
+ throw invalid_utf16(static_cast<uint16_t>(trail_surrogate));
+ }
+ else
+ throw invalid_utf16(static_cast<uint16_t>(cp));
+
+ }
+ // Lone trail surrogate
+ else if (utf8::internal::is_trail_surrogate(cp))
+ throw invalid_utf16(static_cast<uint16_t>(cp));
+
+ result = utf8::append(cp, result);
+ }
+ return result;
+ }
+
+ template <typename u16bit_iterator, typename octet_iterator>
+ u16bit_iterator utf8to16 (octet_iterator start, octet_iterator end, u16bit_iterator result)
+ {
+ 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);
+ *result++ = static_cast<uint16_t>((cp & 0x3ff) + internal::TRAIL_SURROGATE_MIN);
+ }
+ else
+ *result++ = static_cast<uint16_t>(cp);
+ }
+ return result;
+ }
+
+ template <typename octet_iterator, typename u32bit_iterator>
+ octet_iterator utf32to8 (u32bit_iterator start, u32bit_iterator end, octet_iterator result)
+ {
+ while (start != end)
+ result = utf8::append(*(start++), result);
+
+ return result;
+ }
+
+ template <typename octet_iterator, typename u32bit_iterator>
+ u32bit_iterator utf8to32 (octet_iterator start, octet_iterator end, u32bit_iterator result)
+ {
+ while (start != end)
+ (*result++) = utf8::next(start, end);
+
+ return result;
+ }
+
+ // The iterator class
+ template <typename octet_iterator>
+ class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
+ octet_iterator it;
+ octet_iterator range_start;
+ octet_iterator range_end;
+ public:
+ 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)
+ {
+ if (it < range_start || it > range_end)
+ throw std::out_of_range("Invalid utf-8 iterator position");
+ }
+ // the default "big three" are OK
+ octet_iterator base () const { return it; }
+ uint32_t operator * () const
+ {
+ octet_iterator temp = it;
+ return utf8::next(temp, range_end);
+ }
+ 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");
+ return (it == rhs.it);
+ }
+ bool operator != (const iterator& rhs) const
+ {
+ return !(operator == (rhs));
+ }
+ iterator& operator ++ ()
+ {
+ utf8::next(it, range_end);
+ return *this;
+ }
+ iterator operator ++ (int)
+ {
+ iterator temp = *this;
+ utf8::next(it, range_end);
+ return temp;
+ }
+ iterator& operator -- ()
+ {
+ utf8::prior(it, range_start);
+ return *this;
+ }
+ iterator operator -- (int)
+ {
+ iterator temp = *this;
+ utf8::prior(it, range_start);
+ return temp;
+ }
+ }; // class iterator
+
+} // namespace utf8
+
+#endif //header guard
+
+
diff --git a/src/utf8/core.h b/src/utf8/core.h
new file mode 100644
index 0000000..693d388
--- /dev/null
+++ b/src/utf8/core.h
@@ -0,0 +1,329 @@
+// 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 UTF8_FOR_CPP_CORE_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+#define UTF8_FOR_CPP_CORE_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+
+#include <iterator>
+
+namespace utf8
+{
+ // The typedefs for 8-bit, 16-bit and 32-bit unsigned integers
+ // You may need to change them to match your system.
+ // These typedefs have the same names as ones from cstdint, or boost/cstdint
+ typedef unsigned char uint8_t;
+ typedef unsigned short uint16_t;
+ typedef unsigned int uint32_t;
+
+// Helper code - not intended to be directly called by the library users. May be changed at any time
+namespace internal
+{
+ // Unicode constants
+ // Leading (high) surrogates: 0xd800 - 0xdbff
+ // Trailing (low) surrogates: 0xdc00 - 0xdfff
+ const uint16_t LEAD_SURROGATE_MIN = 0xd800u;
+ 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;
+
+ // Maximum valid value for a Unicode code point
+ const uint32_t CODE_POINT_MAX = 0x0010ffffu;
+
+ template<typename octet_type>
+ inline uint8_t mask8(octet_type oc)
+ {
+ return static_cast<uint8_t>(0xff & oc);
+ }
+ template<typename u16_type>
+ inline uint16_t mask16(u16_type oc)
+ {
+ return static_cast<uint16_t>(0xffff & oc);
+ }
+ template<typename octet_type>
+ inline bool is_trail(octet_type oc)
+ {
+ return ((utf8::internal::mask8(oc) >> 6) == 0x2);
+ }
+
+ template <typename u16>
+ inline bool is_lead_surrogate(u16 cp)
+ {
+ return (cp >= LEAD_SURROGATE_MIN && cp <= LEAD_SURROGATE_MAX);
+ }
+
+ template <typename u16>
+ inline bool is_trail_surrogate(u16 cp)
+ {
+ return (cp >= TRAIL_SURROGATE_MIN && cp <= TRAIL_SURROGATE_MAX);
+ }
+
+ template <typename u16>
+ inline bool is_surrogate(u16 cp)
+ {
+ return (cp >= LEAD_SURROGATE_MIN && cp <= TRAIL_SURROGATE_MAX);
+ }
+
+ template <typename u32>
+ inline bool is_code_point_valid(u32 cp)
+ {
+ return (cp <= CODE_POINT_MAX && !utf8::internal::is_surrogate(cp));
+ }
+
+ template <typename octet_iterator>
+ inline typename std::iterator_traits<octet_iterator>::difference_type
+ sequence_length(octet_iterator lead_it)
+ {
+ uint8_t lead = utf8::internal::mask8(*lead_it);
+ if (lead < 0x80)
+ return 1;
+ else if ((lead >> 5) == 0x6)
+ return 2;
+ else if ((lead >> 4) == 0xe)
+ return 3;
+ else if ((lead >> 3) == 0x1e)
+ return 4;
+ else
+ return 0;
+ }
+
+ template <typename octet_difference_type>
+ inline bool is_overlong_sequence(uint32_t cp, octet_difference_type length)
+ {
+ if (cp < 0x80) {
+ if (length != 1)
+ return true;
+ }
+ else if (cp < 0x800) {
+ if (length != 2)
+ return true;
+ }
+ else if (cp < 0x10000) {
+ if (length != 3)
+ return true;
+ }
+
+ return false;
+ }
+
+ enum utf_error {UTF8_OK, NOT_ENOUGH_ROOM, INVALID_LEAD, INCOMPLETE_SEQUENCE, OVERLONG_SEQUENCE, INVALID_CODE_POINT};
+
+ /// Helper for get_sequence_x
+ template <typename octet_iterator>
+ utf_error increase_safely(octet_iterator& it, octet_iterator end)
+ {
+ if (++it == end)
+ return NOT_ENOUGH_ROOM;
+
+ if (!utf8::internal::is_trail(*it))
+ return INCOMPLETE_SEQUENCE;
+
+ return UTF8_OK;
+ }
+
+ #define UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(IT, END) {utf_error ret = increase_safely(IT, END); if (ret != UTF8_OK) return ret;}
+
+ /// get_sequence_x functions decode utf-8 sequences of the length x
+ template <typename octet_iterator>
+ utf_error get_sequence_1(octet_iterator& it, octet_iterator end, uint32_t& code_point)
+ {
+ if (it == end)
+ return NOT_ENOUGH_ROOM;
+
+ code_point = utf8::internal::mask8(*it);
+
+ return UTF8_OK;
+ }
+
+ template <typename octet_iterator>
+ utf_error get_sequence_2(octet_iterator& it, octet_iterator end, uint32_t& code_point)
+ {
+ if (it == end)
+ return NOT_ENOUGH_ROOM;
+
+ code_point = utf8::internal::mask8(*it);
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point = ((code_point << 6) & 0x7ff) + ((*it) & 0x3f);
+
+ return UTF8_OK;
+ }
+
+ template <typename octet_iterator>
+ utf_error get_sequence_3(octet_iterator& it, octet_iterator end, uint32_t& code_point)
+ {
+ if (it == end)
+ return NOT_ENOUGH_ROOM;
+
+ code_point = utf8::internal::mask8(*it);
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point = ((code_point << 12) & 0xffff) + ((utf8::internal::mask8(*it) << 6) & 0xfff);
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point += (*it) & 0x3f;
+
+ return UTF8_OK;
+ }
+
+ template <typename octet_iterator>
+ utf_error get_sequence_4(octet_iterator& it, octet_iterator end, uint32_t& code_point)
+ {
+ if (it == end)
+ return NOT_ENOUGH_ROOM;
+
+ code_point = utf8::internal::mask8(*it);
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point = ((code_point << 18) & 0x1fffff) + ((utf8::internal::mask8(*it) << 12) & 0x3ffff);
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point += (utf8::internal::mask8(*it) << 6) & 0xfff;
+
+ UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR(it, end)
+
+ code_point += (*it) & 0x3f;
+
+ return UTF8_OK;
+ }
+
+ #undef UTF8_CPP_INCREASE_AND_RETURN_ON_ERROR
+
+ template <typename octet_iterator>
+ utf_error validate_next(octet_iterator& it, octet_iterator end, uint32_t& code_point)
+ {
+ // 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;
+
+ uint32_t cp = 0;
+ // Determine the sequence length based on the lead octet
+ typedef typename std::iterator_traits<octet_iterator>::difference_type octet_difference_type;
+ const octet_difference_type length = utf8::internal::sequence_length(it);
+
+ // Get trail octets and calculate the code point
+ utf_error err = UTF8_OK;
+ switch (length) {
+ case 0:
+ return INVALID_LEAD;
+ case 1:
+ err = utf8::internal::get_sequence_1(it, end, cp);
+ break;
+ case 2:
+ err = utf8::internal::get_sequence_2(it, end, cp);
+ break;
+ case 3:
+ err = utf8::internal::get_sequence_3(it, end, cp);
+ break;
+ case 4:
+ err = utf8::internal::get_sequence_4(it, end, cp);
+ break;
+ }
+
+ if (err == UTF8_OK) {
+ // Decoding succeeded. Now, security checks...
+ if (utf8::internal::is_code_point_valid(cp)) {
+ if (!utf8::internal::is_overlong_sequence(cp, length)){
+ // Passed! Return here.
+ code_point = cp;
+ ++it;
+ return UTF8_OK;
+ }
+ else
+ err = OVERLONG_SEQUENCE;
+ }
+ else
+ err = INVALID_CODE_POINT;
+ }
+
+ // Failure branch - restore the original value of the iterator
+ it = original_it;
+ return err;
+ }
+
+ template <typename octet_iterator>
+ inline utf_error validate_next(octet_iterator& it, octet_iterator end) {
+ uint32_t ignored;
+ return utf8::internal::validate_next(it, end, ignored);
+ }
+
+} // namespace internal
+
+ /// The library API - functions intended to be called by the users
+
+ // Byte order mark
+ const uint8_t bom[] = {0xef, 0xbb, 0xbf};
+
+ template <typename octet_iterator>
+ octet_iterator find_invalid(octet_iterator start, octet_iterator end)
+ {
+ octet_iterator result = start;
+ while (result != end) {
+ utf8::internal::utf_error err_code = utf8::internal::validate_next(result, end);
+ if (err_code != internal::UTF8_OK)
+ return result;
+ }
+ return result;
+ }
+
+ template <typename octet_iterator>
+ inline bool is_valid(octet_iterator start, octet_iterator end)
+ {
+ return (utf8::find_invalid(start, end) == end);
+ }
+
+ template <typename octet_iterator>
+ inline bool starts_with_bom (octet_iterator it, octet_iterator end)
+ {
+ return (
+ ((it != end) && (utf8::internal::mask8(*it++)) == bom[0]) &&
+ ((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/unchecked.h b/src/utf8/unchecked.h
new file mode 100644
index 0000000..cb24271
--- /dev/null
+++ b/src/utf8/unchecked.h
@@ -0,0 +1,228 @@
+// 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 UTF8_FOR_CPP_UNCHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+#define UTF8_FOR_CPP_UNCHECKED_H_2675DCD0_9480_4c0c_B92A_CC14C027B731
+
+#include "core.h"
+
+namespace utf8
+{
+ 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 result;
+ }
+
+ template <typename octet_iterator>
+ uint32_t next(octet_iterator& it)
+ {
+ uint32_t cp = utf8::internal::mask8(*it);
+ typename std::iterator_traits<octet_iterator>::difference_type length = utf8::internal::sequence_length(it);
+ switch (length) {
+ case 1:
+ break;
+ case 2:
+ it++;
+ cp = ((cp << 6) & 0x7ff) + ((*it) & 0x3f);
+ break;
+ case 3:
+ ++it;
+ cp = ((cp << 12) & 0xffff) + ((utf8::internal::mask8(*it) << 6) & 0xfff);
+ ++it;
+ cp += (*it) & 0x3f;
+ break;
+ case 4:
+ ++it;
+ cp = ((cp << 18) & 0x1fffff) + ((utf8::internal::mask8(*it) << 12) & 0x3ffff);
+ ++it;
+ cp += (utf8::internal::mask8(*it) << 6) & 0xfff;
+ ++it;
+ cp += (*it) & 0x3f;
+ break;
+ }
+ ++it;
+ return cp;
+ }
+
+ template <typename octet_iterator>
+ uint32_t peek_next(octet_iterator it)
+ {
+ return utf8::unchecked::next(it);
+ }
+
+ template <typename octet_iterator>
+ uint32_t prior(octet_iterator& it)
+ {
+ while (utf8::internal::is_trail(*(--it))) ;
+ octet_iterator temp = it;
+ 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);
+ }
+
+ template <typename octet_iterator>
+ typename std::iterator_traits<octet_iterator>::difference_type
+ distance (octet_iterator first, octet_iterator last)
+ {
+ typename std::iterator_traits<octet_iterator>::difference_type dist;
+ for (dist = 0; first < last; ++dist)
+ utf8::unchecked::next(first);
+ return dist;
+ }
+
+ 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
+ if (utf8::internal::is_lead_surrogate(cp)) {
+ uint32_t trail_surrogate = utf8::internal::mask16(*start++);
+ cp = (cp << 10) + trail_surrogate + internal::SURROGATE_OFFSET;
+ }
+ result = utf8::unchecked::append(cp, result);
+ }
+ return result;
+ }
+
+ template <typename u16bit_iterator, typename octet_iterator>
+ u16bit_iterator utf8to16 (octet_iterator start, octet_iterator end, u16bit_iterator result)
+ {
+ while (start < end) {
+ uint32_t cp = utf8::unchecked::next(start);
+ if (cp > 0xffff) { //make a surrogate pair
+ *result++ = static_cast<uint16_t>((cp >> 10) + internal::LEAD_OFFSET);
+ *result++ = static_cast<uint16_t>((cp & 0x3ff) + internal::TRAIL_SURROGATE_MIN);
+ }
+ else
+ *result++ = static_cast<uint16_t>(cp);
+ }
+ return result;
+ }
+
+ template <typename octet_iterator, typename u32bit_iterator>
+ octet_iterator utf32to8 (u32bit_iterator start, u32bit_iterator end, octet_iterator result)
+ {
+ while (start != end)
+ result = utf8::unchecked::append(*(start++), result);
+
+ return result;
+ }
+
+ template <typename octet_iterator, typename u32bit_iterator>
+ u32bit_iterator utf8to32 (octet_iterator start, octet_iterator end, u32bit_iterator result)
+ {
+ while (start < end)
+ (*result++) = utf8::unchecked::next(start);
+
+ return result;
+ }
+
+ // The iterator class
+ template <typename octet_iterator>
+ class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> {
+ octet_iterator it;
+ public:
+ iterator () {}
+ explicit iterator (const octet_iterator& octet_it): it(octet_it) {}
+ // the default "big three" are OK
+ octet_iterator base () const { return it; }
+ uint32_t operator * () const
+ {
+ octet_iterator temp = it;
+ return utf8::unchecked::next(temp);
+ }
+ bool operator == (const iterator& rhs) const
+ {
+ return (it == rhs.it);
+ }
+ bool operator != (const iterator& rhs) const
+ {
+ return !(operator == (rhs));
+ }
+ iterator& operator ++ ()
+ {
+ ::std::advance(it, utf8::internal::sequence_length(it));
+ return *this;
+ }
+ iterator operator ++ (int)
+ {
+ iterator temp = *this;
+ ::std::advance(it, utf8::internal::sequence_length(it));
+ return temp;
+ }
+ iterator& operator -- ()
+ {
+ utf8::unchecked::prior(it);
+ return *this;
+ }
+ iterator operator -- (int)
+ {
+ iterator temp = *this;
+ utf8::unchecked::prior(it);
+ return temp;
+ }
+ }; // class iterator
+
+ } // namespace utf8::unchecked
+} // namespace utf8
+
+
+#endif // header guard
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 22:46:17 +0000