/usr/include/guacamole/unicode.h is in libguac-dev 0.9.9-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* 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 AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef _GUAC_UNICODE_H
#define _GUAC_UNICODE_H
/**
* Provides functions for manipulating Unicode strings.
*
* @file unicode.h
*/
#include <stddef.h>
/**
* Given the initial byte of a single UTF-8 character, returns the overall
* byte size of the entire character.
*
* @param c The initial byte of the character to check.
* @return The number of bytes in the given character overall.
*/
size_t guac_utf8_charsize(unsigned char c);
/**
* Given a UTF-8-encoded string, returns the length of the string in characters
* (not bytes).
*
* @param str The UTF-8 string to calculate the length of.
* @return The length in characters of the given UTF-8 string.
*/
size_t guac_utf8_strlen(const char* str);
/**
* Given destination buffer and its length, writes the given codepoint as UTF-8
* to the buffer, returning the number of bytes written. If there is not enough
* space in the buffer to write the character, no bytes are written at all.
*
* @param codepoint The Unicode codepoint to write to the buffer.
* @param utf8 The buffer to write to.
* @param length The length of the buffer, in bytes.
* @return The number of bytes written, which may be zero if there is not
* enough space in the buffer to write the UTF-8 character.
*/
int guac_utf8_write(int codepoint, char* utf8, int length);
/**
* Given a buffer containing UTF-8 characters, reads the first codepoint in the
* buffer, returning the length of the codepoint in bytes. If no codepoint
* could be read, zero is returned.
*
* @param utf8 A buffer containing UTF-8 characters.
* @param length The length of the buffer, in bytes.
* @param codepoint A pointer to an integer which will contain the codepoint
* read, if any. If no character can be read, the integer
* will be left untouched.
* @return The number of bytes read, which may be zero if there is not enough
* space in the buffer to read a character.
*/
int guac_utf8_read(const char* utf8, int length, int* codepoint);
#endif
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