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tutf8e: Tiny UTF-8 Encoder for C
Signed-off-by: Nigel Stewart <[email protected]>
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‎lib/tutf8e/CMakeLists.txt‎

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cmake_minimum_required(VERSION 2.8)
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project(tutf8e)
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set(CMAKE_C_FLAGS "-Os -Wall")
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include_directories(include)
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file(GLOB src src/*.c)
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add_library(tutf8e STATIC ${src})
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add_executable(tutf8e-test test/test.c)
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target_link_libraries(tutf8e-test tutf8e)

‎lib/tutf8e/LICENSE‎

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MIT License
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Copyright (c) 2019 Nigel Stewart
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎lib/tutf8e/README.md‎

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# tutf8e
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*Tute Feighty*
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A tiny UTF-8 encoder for C.
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## Goals
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* As small and fast as possible
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* Narrowly scoped to one-step UTF-8 encoding in C
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* Link only what you need and use
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* MIT licence
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## Supported Encodings
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* [iso-8859-1](https://en.wikipedia.org/wiki/ISO/IEC_8859-1) Latin-1 Western European
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* [iso-8859-2](https://en.wikipedia.org/wiki/ISO/IEC_8859-2) Latin-2 East European
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* [iso-8859-3](https://en.wikipedia.org/wiki/ISO/IEC_8859-3) Latin-3 South European
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* [iso-8859-4](https://en.wikipedia.org/wiki/ISO/IEC_8859-4) Latin-4 North European
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* [iso-8859-5](https://en.wikipedia.org/wiki/ISO/IEC_8859-5) Part 5: Latin/Cyrillic
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* [iso-8859-6](https://en.wikipedia.org/wiki/ISO/IEC_8859-6) Part 6: Latin/Arabic
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* [iso-8859-7](https://en.wikipedia.org/wiki/ISO/IEC_8859-7) Part 7: Latin/Greek
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* [iso-8859-8](https://en.wikipedia.org/wiki/ISO/IEC_8859-8) Part 8: Latin/Hebrew
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* [iso-8859-9](https://en.wikipedia.org/wiki/ISO/IEC_8859-9) Latin-5 Turkish
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* [iso-8859-10](https://en.wikipedia.org/wiki/ISO/IEC_8859-10) Latin-6 Nordic
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* [iso-8859-11](https://en.wikipedia.org/wiki/ISO/IEC_8859-11) Part 11: Latin/Thai
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* [iso-8859-13](https://en.wikipedia.org/wiki/ISO/IEC_8859-13) Latin-7 Baltic Rim
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* [iso-8859-14](https://en.wikipedia.org/wiki/ISO/IEC_8859-14) Latin-8 Celtic
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* [iso-8859-15](https://en.wikipedia.org/wiki/ISO/IEC_8859-15) Latin-9 Western European
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* [iso-8859-16](https://en.wikipedia.org/wiki/ISO/IEC_8859-16) Latin-10 South-Eastern European
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* [windows-1250](https://en.wikipedia.org/wiki/Windows-1250) Central European and Eastern European
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* [windows-1251](https://en.wikipedia.org/wiki/Windows-1251) Cyrillic
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* [windows-1252](https://en.wikipedia.org/wiki/Windows-1252) English
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* [windows-1253](https://en.wikipedia.org/wiki/Windows-1253) Greek
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* [windows-1254](https://en.wikipedia.org/wiki/Windows-1254) Turkish
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* [windows-1255](https://en.wikipedia.org/wiki/Windows-1255) Hebrew
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* [windows-1256](https://en.wikipedia.org/wiki/Windows-1256) Arabic
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* [windows-1257](https://en.wikipedia.org/wiki/Windows-1257) Baltic
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* [windows-1258](https://en.wikipedia.org/wiki/Windows-1258) Vietnamese
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## Test Procedure
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```
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$ ./codegen.py
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$ gcc src/* test/test.c -Iinclude
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$ ./a.out
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A quick brown fox jumps over the lazy dog
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Nechť již hříšné saxofony ďáblů rozezvučí síň úděsnými tóny waltzu, tanga a quickstepu.
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Pijamalı hasta yağız şoföre çabucak güvendi.
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Põdur Zagrebi tšellomängija-följetonist Ciqo külmetas kehvas garaažis
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В чащах юга жил бы цитрус? Да, но фальшивый экземпляр!
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διαφυλάξτε γενικά τη ζωή σας από βαθειά ψυχικά τραύματα
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עטלף אבק נס דרך מזגן שהתפוצץ כי חם
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Pijamalı hasta yağız şoföre çabucak güvendi.
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Flygande bäckasiner söka hwila på mjuka tuvor.
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เป็นมนุษย์สุดประเสริฐเลิศคุณค่า กว่าบรรดาฝูงสัตว์เดรัจฉาน จงฝ่าฟันพัฒนาวิชาการ อย่าล้างผลาญฤๅเข่นฆ่าบีฑาใคร ไม่ถือโทษโกรธแช่งซัดฮึดฮัดด่า หัดอภัยเหมือนกีฬาอัชฌาสัย ปฏิบัติประพฤติกฎกำหนดใจ พูดจาให้จ๊ะๆ จ๋าๆ น่าฟังเอยฯ
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Jeżu klątw, spłódź Finom część gry hańb!
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11 passed, 0 failed tests
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```
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## How small is it?
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512 bytes + overhead per encoding.
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```
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$ for i in src/*; do gcc -c $i -O1; done
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$ du -bhc *.o | grep total
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32K total
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$ for i in src/*; do gcc -c $i -O3; done
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$ du -bhc *.o | grep total
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32K total
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$ for i in src/*; do gcc -c $i -Os; done
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$ du -bhc *.o | grep total
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28K total
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```
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## Related
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* [iconv](https://www.gnu.org/software/libiconv/)
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* [icu](http://site.icu-project.org/)

‎lib/tutf8e/include/tutf8e.h‎

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#ifndef TUTF8E_H
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#define TUTF8E_H
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#include <stddef.h> /* size_t */
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#include <stdint.h> /* uint16_t */
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/* Internal API */
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extern int tutf8e_string_length(const uint16_t *table, const char *i, size_t *ilen, size_t *olen);
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extern int tutf8e_buffer_length(const uint16_t *table, const char *i, size_t ilen, size_t *length);
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extern int tutf8e_buffer_encode(const uint16_t *table, const char *i, size_t ilen, char *output, size_t *olen);
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/* External API */
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/* Encode NUL-terminated string to UTF8 */
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extern int tutf8e_string_encode_iso_8859_1 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_10 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_11 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_13 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_14 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_15 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_16 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_2 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_3 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_4 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_5 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_6 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_7 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_8 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_iso_8859_9 (char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1250(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1251(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1252(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1253(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1254(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1255(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1256(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1257(char *output, size_t olen, const char *input);
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extern int tutf8e_string_encode_windows_1258(char *output, size_t olen, const char *input);
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/* Encode NUL-terminated string to UTF8, realloc as necessary */
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extern char * tutf8e_string_encode_iso_8859_1_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_10_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_11_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_13_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_14_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_15_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_16_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_2_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_3_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_4_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_5_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_6_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_7_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_8_realloc(char *input);
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extern char * tutf8e_string_encode_iso_8859_9_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1250_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1251_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1252_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1253_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1254_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1255_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1256_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1257_realloc(char *input);
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extern char * tutf8e_string_encode_windows_1258_realloc(char *input);
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/* Encode buffer to UTF8 */
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extern int tutf8e_buffer_encode_iso_8859_1 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_10 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_11 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_13 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_14 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_15 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_16 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_2 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_3 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_4 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_5 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_6 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_7 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_8 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_iso_8859_9 (char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1250(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1251(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1252(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1253(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1254(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1255(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1256(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1257(char *output, size_t *olen, const char *input, size_t ilen);
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extern int tutf8e_buffer_encode_windows_1258(char *output, size_t *olen, const char *input, size_t ilen);
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#endif

‎lib/tutf8e/src/iso_8859_1.c‎

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#include <tutf8e.h>
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#include <string.h> /* strlen */
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#include <stdlib.h> /* malloc/free */
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static const uint16_t iso_8859_1_utf8[256] =
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{
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0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
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0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
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0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
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0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
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0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
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0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
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0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
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0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
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0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
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0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
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0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
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0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7, 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
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0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
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0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
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0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
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0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff,
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};
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int tutf8e_string_encode_iso_8859_1(char *output, size_t olen, const char *input)
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{
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size_t len = strlen(input) + 1;
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return tutf8e_buffer_encode(iso_8859_1_utf8, input, len, output, &olen);
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}
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int tutf8e_buffer_encode_iso_8859_1(char *output, size_t *olen, const char *input, size_t ilen)
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{
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return tutf8e_buffer_encode(iso_8859_1_utf8, input, ilen, output, olen);
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}
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char * tutf8e_string_encode_iso_8859_1_realloc(char *input)
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{
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size_t ilen = 0;
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size_t olen = 0;
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if (input && !tutf8e_string_length(iso_8859_1_utf8, input, &ilen, &olen) && ilen && olen && ilen!=olen) {
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char * output = malloc(olen + 1);
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if (output && !tutf8e_buffer_encode(iso_8859_1_utf8, input, ilen, output, &olen)) {
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free(input);
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output[olen] = 0;
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return output;
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}
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free(output);
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}
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return input;
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}

‎lib/tutf8e/src/iso_8859_10.c‎

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#include <tutf8e.h>
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#include <string.h> /* strlen */
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#include <stdlib.h> /* malloc/free */
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static const uint16_t iso_8859_10_utf8[256] =
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{
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0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
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0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
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0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
11+
0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
12+
0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
13+
0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
14+
0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
15+
0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
16+
0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
17+
0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
18+
0x00a0, 0x0104, 0x0112, 0x0122, 0x012a, 0x0128, 0x0136, 0x00a7, 0x013b, 0x0110, 0x0160, 0x0166, 0x017d, 0x00ad, 0x016a, 0x014a,
19+
0x00b0, 0x0105, 0x0113, 0x0123, 0x012b, 0x0129, 0x0137, 0x00b7, 0x013c, 0x0111, 0x0161, 0x0167, 0x017e, 0x2015, 0x016b, 0x014b,
20+
0x0100, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x012e, 0x010c, 0x00c9, 0x0118, 0x00cb, 0x0116, 0x00cd, 0x00ce, 0x00cf,
21+
0x00d0, 0x0145, 0x014c, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x0168, 0x00d8, 0x0172, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
22+
0x0101, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x012f, 0x010d, 0x00e9, 0x0119, 0x00eb, 0x0117, 0x00ed, 0x00ee, 0x00ef,
23+
0x00f0, 0x0146, 0x014d, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x0169, 0x00f8, 0x0173, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x0138,
24+
};
25+
26+
int tutf8e_string_encode_iso_8859_10(char *output, size_t olen, const char *input)
27+
{
28+
size_t len = strlen(input) + 1;
29+
return tutf8e_buffer_encode(iso_8859_10_utf8, input, len, output, &olen);
30+
}
31+
32+
int tutf8e_buffer_encode_iso_8859_10(char *output, size_t *olen, const char *input, size_t ilen)
33+
{
34+
return tutf8e_buffer_encode(iso_8859_10_utf8, input, ilen, output, olen);
35+
}
36+
37+
char * tutf8e_string_encode_iso_8859_10_realloc(char *input)
38+
{
39+
size_t ilen = 0;
40+
size_t olen = 0;
41+
if (input && !tutf8e_string_length(iso_8859_10_utf8, input, &ilen, &olen) && ilen && olen && ilen!=olen) {
42+
char * output = malloc(olen + 1);
43+
if (output && !tutf8e_buffer_encode(iso_8859_10_utf8, input, ilen, output, &olen)) {
44+
free(input);
45+
output[olen] = 0;
46+
return output;
47+
}
48+
free(output);
49+
}
50+
return input;
51+
}

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