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
156
157
158
159
160
161
162
|
/* $Id$ */
/** @file
* IPRT - RTPathParseSimple
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 of the
* License.
*
* 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 <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/path.h>
#include <iprt/assert.h>
#include <iprt/ctype.h>
/**
* Parses a path.
*
* It figures the length of the directory component, the offset of
* the file name and the location of the suffix dot.
*
* @returns The path length.
*
* @param pszPath Path to find filename in.
* @param pcchDir Where to put the length of the directory component. If
* no directory, this will be 0. Optional.
* @param poffName Where to store the filename offset.
* If empty string or if it's ending with a slash this
* will be set to -1. Optional.
* @param poffSuff Where to store the suffix offset (the last dot).
* If empty string or if it's ending with a slash this
* will be set to -1. Optional.
*/
RTDECL(size_t) RTPathParseSimple(const char *pszPath, size_t *pcchDir, ssize_t *poffName, ssize_t *poffSuff)
{
/*
* First deal with the root as it is always more fun that you'd think.
*/
const char *psz = pszPath;
size_t cchRoot = 0;
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
if (RT_C_IS_ALPHA(*psz) && RTPATH_IS_VOLSEP(psz[1]))
{
/* Volume specifier. */
cchRoot = 2;
psz += 2;
}
else if (RTPATH_IS_SLASH(*psz) && RTPATH_IS_SLASH(psz[1]))
{
/* UNC - there are exactly two prefix slashes followed by a namespace
or computer name, which can be empty on windows. */
cchRoot = 2;
psz += 2;
while (!RTPATH_IS_SLASH(*psz) && *psz)
{
cchRoot++;
psz++;
}
}
#endif
while (RTPATH_IS_SLASH(*psz))
{
cchRoot++;
psz++;
}
/*
* Do the remainder.
*/
const char *pszName = psz;
const char *pszLastDot = NULL;
for (;; psz++)
{
switch (*psz)
{
default:
break;
/* handle separators. */
#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
case '\\':
#endif
case '/':
pszName = psz + 1;
pszLastDot = NULL;
break;
case '.':
pszLastDot = psz;
break;
/*
* The end. Complete the results.
*/
case '\0':
{
ssize_t offName = *pszName != '\0' ? pszName - pszPath : -1;
if (poffName)
*poffName = offName;
if (poffSuff)
{
ssize_t offSuff = -1;
if ( pszLastDot
&& pszLastDot != pszName
&& pszLastDot[1] != '\0')
{
offSuff = pszLastDot - pszPath;
Assert(offSuff > offName);
}
*poffSuff = offSuff;
}
if (pcchDir)
{
size_t cch = offName < 0 ? psz - pszPath : offName - 1 < (ssize_t)cchRoot ? cchRoot : offName - 1;
while (cch > cchRoot && RTPATH_IS_SLASH(pszPath[cch - 1]))
cch--;
*pcchDir = cch;
}
return psz - pszPath;
}
}
}
/* will never get here */
}
|
