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Writes a code point to the given string, advancing the text pointer to the next byte. - Parameters:
-
| text_encoding | the character encoding the text is coded in |
| c | the unicode code point to write to the string |
| text | a pointer to the text pointer, to be advanced to the next character on success |
| len0 | a pointer to the length of the buffer, including any terminating NUL, to be decreased by the number of bytes that text is advanced on success |
- Returns:
- >=0 success, the number of bytes used to write this code point
KATE_E_* error
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