0.9.10-incubating/libguac/unicode_8h_source.html

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 #ifndef _GUAC_UNICODE_H
 #define _GUAC_UNICODE_H

 #include <stddef.h>

 size_t guac_utf8_charsize(unsigned char c);

 size_t guac_utf8_strlen(const char* str);

 int guac_utf8_write(int codepoint, char* utf8, int length);

 int guac_utf8_read(const char* utf8, int length, int* codepoint);

 #endif

guac_utf8_write
int guac_utf8_write(int codepoint, char *utf8, int length)
Given destination buffer and its length, writes the given codepoint as UTF-8 to the buffer...

guac_utf8_strlen
size_t guac_utf8_strlen(const char *str)
Given a UTF-8-encoded string, returns the length of the string in characters (not bytes)...

guac_utf8_read
int guac_utf8_read(const char *utf8, int length, int *codepoint)
Given a buffer containing UTF-8 characters, reads the first codepoint in the buffer, returning the length of the codepoint in bytes.

guac_utf8_charsize
size_t guac_utf8_charsize(unsigned char c)
Given the initial byte of a single UTF-8 character, returns the overall byte size of the entire chara...