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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
** File: plgetopt.c
** Description: utilities to parse argc/argv
*/
#include "prmem.h"
#include "prlog.h"
#include "prerror.h"
#include "plstr.h"
#include "plgetopt.h"
#include <string.h>
static char static_Nul = 0;
struct PLOptionInternal
{
const char *options; /* client options list specification */
PRIntn argc; /* original number of arguments */
char **argv; /* vector of pointers to arguments */
PRIntn xargc; /* which one we're processing now */
const char *xargv; /* where within *argv[xargc] */
PRBool minus; /* do we already have the '-'? */
};
/*
** Create the state in which to parse the tokens.
**
** argc the sum of the number of options and their values
** argv the options and their values
** options vector of single character options w/ | w/o ':
*/
PR_IMPLEMENT(PLOptState*) PL_CreateOptState(
PRIntn argc, char **argv, const char *options)
{
PLOptState *opt = NULL;
if (NULL == options)
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
else
{
opt = PR_NEWZAP(PLOptState);
if (NULL == opt)
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
else
{
PLOptionInternal *internal = PR_NEW(PLOptionInternal);
if (NULL == internal)
{
PR_DELETE(opt);
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
}
else
{
opt->option = 0;
opt->value = NULL;
opt->internal = internal;
internal->argc = argc;
internal->argv = argv;
internal->xargc = 0;
internal->xargv = &static_Nul;
internal->minus = PR_FALSE;
internal->options = options;
}
}
}
return opt;
} /* PL_CreateOptState */
/*
** Destroy object created by CreateOptState()
*/
PR_IMPLEMENT(void) PL_DestroyOptState(PLOptState *opt)
{
PR_DELETE(opt->internal);
PR_DELETE(opt);
} /* PL_DestroyOptState */
PR_IMPLEMENT(PLOptStatus) PL_GetNextOpt(PLOptState *opt)
{
PLOptionInternal *internal = opt->internal;
PRIntn cop, eoo = PL_strlen(internal->options);
/*
** If the current xarg points to nul, advance to the next
** element of the argv vector. If the vector index is equal
** to argc, we're out of arguments, so return an EOL.
** Note whether the first character of the new argument is
** a '-' and skip by it if it is.
*/
while (0 == *internal->xargv)
{
internal->xargc += 1;
if (internal->xargc >= internal->argc)
{
opt->option = 0;
opt->value = NULL;
return PL_OPT_EOL;
}
internal->xargv = internal->argv[internal->xargc];
internal->minus = ('-' == *internal->xargv ? PR_TRUE : PR_FALSE); /* not it */
if (internal->minus) internal->xargv += 1; /* and consume */
}
/*
** If we already have a '-' in hand, xargv points to the next
** option. See if we can find a match in the list of possible
** options supplied.
*/
if (internal->minus)
{
for (cop = 0; cop < eoo; ++cop)
{
if (internal->options[cop] == *internal->xargv)
{
opt->option = *internal->xargv;
internal->xargv += 1;
/*
** if options indicates that there's an associated
** value, this argv is finished and the next is the
** option's value.
*/
if (':' == internal->options[cop + 1])
{
if (0 != *internal->xargv) return PL_OPT_BAD;
opt->value = internal->argv[++(internal->xargc)];
internal->xargv = &static_Nul;
internal->minus = PR_FALSE;
}
else opt->value = NULL;
return PL_OPT_OK;
}
}
internal->xargv += 1; /* consume that option */
return PL_OPT_BAD;
}
/*
** No '-', so it must be a standalone value. The option is nul.
*/
opt->value = internal->argv[internal->xargc];
internal->xargv = &static_Nul;
opt->option = 0;
return PL_OPT_OK;
} /* PL_GetNextOpt */
/* plgetopt.c */
|
