source: trunk/kernel/libk/string.h @ 8

Last change on this file since 8 was 1, checked in by alain, 8 years ago

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1/*
2 * string.h - string related helper functions definition.
3 *
4 * Authors      Ghassan Almaless (2007,2009,2010,2011,2012)
5 *              Alain Greiner (2017)
6 *
7 * Copyright (c) UPMC Sorbonne Universites
8 *
9 * This file is part of ALMOS-MKH.
10 *
11 * ALMOS-MKH is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; version 2.0 of the License.
14 *
15 * ALMOS-MKH is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#ifndef _STRING_H_
26#define _STRING_H_
27
28#include <hal_types.h>
29
30
31/********************************************************************************************
32 * This function returns the length of a character string.
33 ********************************************************************************************
34 * @ s     : pointer on the string.
35 * @ return the number of characters preceding the NUL character.
36 *******************************************************************************************/
37uint32_t strlen( const char * s );
38
39/********************************************************************************************
40 * This function attempts to compute the length of a string, but never scans beyond
41 * <maxlen> characters.
42 ********************************************************************************************
43 * @ s     : pointer on the string.
44 * returns min( maxlen , number of characters preceding the NUL character).
45 *******************************************************************************************/
46uint32_t strnlen( const char * str, 
47                  uint32_t     maxlen );
48
49/********************************************************************************************
50 * This function compares lexicographically the strind s1 and s2.
51 * characters are considered unsigned.
52 * I does not compare characters after the first NUL character.
53 ********************************************************************************************
54 * @ s1   : pointer on string.
55 * @ s2   : pointer on string.
56 * @ return 0 if s1 == s2 / return 1 if s1 > s2 / return -1 if s1 < s2
57 *******************************************************************************************/
58int strcmp ( const char * s1, 
59             const char * s2 );
60
61/********************************************************************************************
62 * This function compares lexicographically the strind s1 and s2.
63 * I does not compare than <n> characters and stops after the first NUL character.
64 ********************************************************************************************
65 * @ s1   : pointer on string.
66 * @ s2   : pointer on string.
67 * @ n    : max number of compared characters.
68 * @ return 0 if s1 == s2 / return 1 if s1 > s2 / return -1 if s1 < s2
69 *******************************************************************************************/
70int strncmp ( const char * s1,
71              const char * s2,
72              uint32_t     n );
73
74/********************************************************************************************
75 * This function compares lexicographically the strind s1 and s2, ignoring case.
76 ********************************************************************************************
77 * @ s1   : pointer on string.
78 * @ s2   : pointer on string.
79 * @ return 0 if s1 == s2 / return 1 if s1 > s2 / return -1 if s1 < s2
80 *******************************************************************************************/
81int strcasecmp ( const char * s1,
82                 const char * s2 );
83
84/********************************************************************************************
85 * TODO
86 ********************************************************************************************
87 *******************************************************************************************/
88char * strcpy ( char * dest, 
89                char * src );
90
91/********************************************************************************************
92 * TODO
93 ********************************************************************************************
94 *******************************************************************************************/
95char * strncpy ( char    * dest,
96                 char    * src,
97                 uint32_t  n );
98
99/********************************************************************************************
100 * TODO
101 ********************************************************************************************
102 *******************************************************************************************/
103char * strchr ( const char * s,
104                int          c );
105
106/********************************************************************************************
107 * TODO
108 ********************************************************************************************
109 *******************************************************************************************/
110char * strrchr ( const char * t,
111                 int          c );
112
113#endif  /* _STRING_H_ */
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