mirror of
https://github.com/ceph/ceph
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64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2011 New Dream Network
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef CEPH_COMMON_UTF8_H
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#define CEPH_COMMON_UTF8_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Checks if a buffer is valid UTF-8.
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* Returns 0 if it is, and one plus the offset of the first invalid byte
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* if it is not.
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*/
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int check_utf8(const char *buf, int len);
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/* Checks if a null-terminated string is valid UTF-8.
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* Returns 0 if it is, and one plus the offset of the first invalid byte
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* if it is not.
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*/
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int check_utf8_cstr(const char *buf);
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/* Returns true if 'ch' is a control character.
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* We do count newline as a control character, but not NULL.
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*/
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int is_control_character(int ch);
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/* Checks if a buffer contains control characters.
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*/
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int check_for_control_characters(const char *buf, int len);
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/* Checks if a null-terminated string contains control characters.
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*/
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int check_for_control_characters_cstr(const char *buf);
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/* Encode a 31-bit UTF8 code point to 'buf'.
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* Assumes buf is of size MAX_UTF8_SZ
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* Returns -1 on failure; number of bytes in the encoded value otherwise.
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*/
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int encode_utf8(unsigned long u, unsigned char *buf);
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/*
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* Decode a UTF8 character from an array of bytes. Return character code.
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* Upon error, return INVALID_UTF8_CHAR.
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*/
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unsigned long decode_utf8(unsigned char *buf, int nbytes);
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#ifdef __cplusplus
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}
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#endif
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#endif
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