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
|
/*
* Copyright 1987, 1988 by MIT Student Information Processing Board
*
* For copyright info, see copyright.h.
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "ss_internal.h"
#include "copyright.h"
#include <errno.h>
enum parse_mode { WHITESPACE, TOKEN, QUOTED_STRING };
/*
* Solaris Kerberos:
* ss_parse has been modified slightly from the original in two ways.
* 1) A new parameter "quiet" has been added which is used to silence
* error or warning messages.
* 2) ss_parse now returns an error status instead of argv - this is to
* allow an error to be distinguished from no tokens when parsing an empty
* string.
* Both of these changes allow ss_parse to be used during tab-completion.
*/
/*
* parse(line_ptr, argc_ptr)
*
* Function:
* Parses line, dividing at whitespace, into tokens, returns
* the "argc" and "argv" values.
* Arguments:
* line_ptr (char *)
* Pointer to text string to be parsed.
* argc_ptr (int *)
* Where to put the "argc" (number of tokens) value.
* argv_ptr (char ***)
* Where to put the series of pointers to parsed tokens.
* Returns:
* error (0 - success, non-zero on failure)
*/
#define NEW_ARGV(old,n) (char **)realloc((char *)old,\
(unsigned)(n+2)*sizeof(char*))
int ss_parse (sci_idx, line_ptr, argc_ptr, argv_ptr, quiet)
int sci_idx;
register char *line_ptr;
int *argc_ptr;
char ***argv_ptr;
int quiet;
{
register char **argv, *cp;
register int argc;
register enum parse_mode parse_mode;
argv = (char **) malloc (sizeof(char *));
if (argv == (char **)NULL) {
if (!quiet)
ss_error(sci_idx, errno, "Can't allocate storage");
*argc_ptr = 0;
*argv_ptr = argv;
return(ENOMEM);
}
*argv = (char *)NULL;
argc = 0;
parse_mode = WHITESPACE; /* flushing whitespace */
cp = line_ptr; /* cp is for output */
while (1) {
#ifdef DEBUG
{
printf ("character `%c', mode %d\n", *line_ptr, parse_mode);
}
#endif
while (parse_mode == WHITESPACE) {
if (*line_ptr == '\0')
goto end_of_line;
if (*line_ptr == ' ' || *line_ptr == '\t') {
line_ptr++;
continue;
}
if (*line_ptr == '"') {
/* go to quoted-string mode */
parse_mode = QUOTED_STRING;
cp = line_ptr++;
argv = NEW_ARGV (argv, argc);
argv[argc++] = cp;
argv[argc] = NULL;
}
else {
/* random-token mode */
parse_mode = TOKEN;
cp = line_ptr;
argv = NEW_ARGV (argv, argc);
argv[argc++] = line_ptr;
argv[argc] = NULL;
}
}
while (parse_mode == TOKEN) {
if (*line_ptr == '\0') {
*cp++ = '\0';
goto end_of_line;
}
else if (*line_ptr == ' ' || *line_ptr == '\t') {
*cp++ = '\0';
line_ptr++;
parse_mode = WHITESPACE;
}
else if (*line_ptr == '"') {
line_ptr++;
parse_mode = QUOTED_STRING;
}
else {
*cp++ = *line_ptr++;
}
}
while (parse_mode == QUOTED_STRING) {
if (*line_ptr == '\0') {
if (!quiet)
ss_error (sci_idx, 0,
"Unbalanced quotes in command line");
free (argv);
*argc_ptr = 0;
*argv_ptr = NULL;
return (-1);
}
else if (*line_ptr == '"') {
if (*++line_ptr == '"') {
*cp++ = '"';
line_ptr++;
}
else {
parse_mode = TOKEN;
}
}
else {
*cp++ = *line_ptr++;
}
}
}
end_of_line:
*argc_ptr = argc;
#ifdef DEBUG
{
int i;
printf ("argc = %d\n", argc);
for (i = 0; i <= argc; i++)
printf ("\targv[%2d] = `%s'\n", i,
argv[i] ? argv[i] : "<NULL>");
}
#endif
*argv_ptr = argv;
return(0);
}
|
