summaryrefslogtreecommitdiff
path: root/lib/util/util_str_common.c
blob: 20682f9935549e9313d8551a32803fda66b2a8ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*
   Unix SMB/CIFS implementation.
   Samba utility functions

   Copyright (C) Andrew Tridgell 1992-2001
   Copyright (C) Simo Sorce      2001-2002
   Copyright (C) Martin Pool     2003
   Copyright (C) James Peach	 2005

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

/**
Do a case-insensitive, whitespace-ignoring string compare.
**/
_PUBLIC_ int strwicmp(const char *psz1, const char *psz2)
{
	/* if BOTH strings are NULL, return TRUE, if ONE is NULL return */
	/* appropriate value. */
	if (psz1 == psz2)
		return (0);
	else if (psz1 == NULL)
		return (-1);
	else if (psz2 == NULL)
		return (1);

	/* sync the strings on first non-whitespace */
	while (1) {
		while (isspace((int)*psz1))
			psz1++;
		while (isspace((int)*psz2))
			psz2++;
		if (toupper_m((unsigned char)*psz1) != toupper_m((unsigned char)*psz2)
		    || *psz1 == '\0'
		    || *psz2 == '\0')
			break;
		psz1++;
		psz2++;
	}
	return (*psz1 - *psz2);
}

_PUBLIC_ size_t ucs2_align(const void *base_ptr, const void *p, int flags)
{
	if (flags & (STR_NOALIGN|STR_ASCII))
		return 0;
	return PTR_DIFF(p, base_ptr) & 1;
}

/**
 String replace.
 NOTE: oldc and newc must be 7 bit characters
**/
void string_replace( char *s, char oldc, char newc )
{
	char *p;

	/* this is quite a common operation, so we want it to be
	   fast. We optimise for the ascii case, knowing that all our
	   supported multi-byte character sets are ascii-compatible
	   (ie. they match for the first 128 chars) */

	for (p = s; *p; p++) {
		if (*p & 0x80) /* mb string - slow path. */
			break;
		if (*p == oldc) {
			*p = newc;
		}
	}

	if (!*p)
		return;

	/* Slow (mb) path. */
#ifdef BROKEN_UNICODE_COMPOSE_CHARACTERS
	/* With compose characters we must restart from the beginning. JRA. */
	p = s;
#endif

	while (*p) {
		size_t c_size;
		next_codepoint(p, &c_size);

		if (c_size == 1) {
			if (*p == oldc) {
				*p = newc;
			}
		}
		p += c_size;
	}
}


/**
 Paranoid strcpy into a buffer of given length (includes terminating
 zero. Strips out all but 'a-Z0-9' and the character in other_safe_chars
 and replaces with '_'. Deliberately does *NOT* check for multibyte
 characters. Treats src as an array of bytes, not as a multibyte
 string. Any byte >0x7f is automatically converted to '_'.
 other_safe_chars must also contain an ascii string (bytes<0x7f).
**/

char *alpha_strcpy(char *dest,
		   const char *src,
		   const char *other_safe_chars,
		   size_t maxlength)
{
	size_t len, i;

	if (!dest) {
		smb_panic("ERROR: NULL dest in alpha_strcpy");
	}

	if (!src) {
		*dest = 0;
		return dest;
	}

	len = strlen(src);
	if (len >= maxlength)
		len = maxlength - 1;

	if (!other_safe_chars)
		other_safe_chars = "";

	for(i = 0; i < len; i++) {
		int val = (src[i] & 0xff);
		if (val > 0x7f) {
			dest[i] = '_';
			continue;
		}
		if (isupper(val) || islower(val) ||
				isdigit(val) || strchr(other_safe_chars, val))
			dest[i] = src[i];
		else
			dest[i] = '_';
	}

	dest[i] = '\0';

	return dest;
}