/src/httpd/srclib/apr/strings/apr_strtok.c
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1 | | /* Licensed to the Apache Software Foundation (ASF) under one or more |
2 | | * contributor license agreements. See the NOTICE file distributed with |
3 | | * this work for additional information regarding copyright ownership. |
4 | | * The ASF licenses this file to You under the Apache License, Version 2.0 |
5 | | * (the "License"); you may not use this file except in compliance with |
6 | | * the License. You may obtain a copy of the License at |
7 | | * |
8 | | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | | * |
10 | | * Unless required by applicable law or agreed to in writing, software |
11 | | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | | * See the License for the specific language governing permissions and |
14 | | * limitations under the License. |
15 | | */ |
16 | | |
17 | | #ifdef HAVE_STDDEF_H |
18 | | #include <stddef.h> /* for NULL */ |
19 | | #endif |
20 | | |
21 | | #include "apr.h" |
22 | | #include "apr_strings.h" |
23 | | |
24 | | #define APR_WANT_STRFUNC /* for strchr() */ |
25 | | #include "apr_want.h" |
26 | | |
27 | | APR_DECLARE(char *) apr_strtok(char *str, const char *sep, char **last) |
28 | 0 | { |
29 | 0 | char *token; |
30 | |
|
31 | 0 | if (!str) /* subsequent call */ |
32 | 0 | str = *last; /* start where we left off */ |
33 | | |
34 | | /* skip characters in sep (will terminate at '\0') */ |
35 | 0 | while (*str && strchr(sep, *str)) |
36 | 0 | ++str; |
37 | |
|
38 | 0 | if (!*str) /* no more tokens */ |
39 | 0 | return NULL; |
40 | | |
41 | 0 | token = str; |
42 | | |
43 | | /* skip valid token characters to terminate token and |
44 | | * prepare for the next call (will terminate at '\0) |
45 | | */ |
46 | 0 | *last = token + 1; |
47 | 0 | while (**last && !strchr(sep, **last)) |
48 | 0 | ++*last; |
49 | |
|
50 | 0 | if (**last) { |
51 | 0 | **last = '\0'; |
52 | 0 | ++*last; |
53 | 0 | } |
54 | |
|
55 | 0 | return token; |
56 | 0 | } |
57 | | |
58 | | APR_DECLARE(char *) apr_strqtok(char *str, const char *sep, char **last) |
59 | 0 | { |
60 | 0 | char *token; |
61 | 0 | apr_size_t rewind = 0; |
62 | 0 | char c, q = 0, s = 0; |
63 | |
|
64 | 0 | if (!str) { /* subsequent call */ |
65 | 0 | str = *last; /* start where we left off */ |
66 | 0 | } |
67 | | |
68 | | /* skip characters in sep (will terminate at '\0') */ |
69 | 0 | while (*str && strchr(sep, *str)) { |
70 | 0 | ++str; |
71 | 0 | } |
72 | |
|
73 | 0 | if (!*str) { /* no more tokens */ |
74 | 0 | return NULL; |
75 | 0 | } |
76 | | |
77 | 0 | token = str; |
78 | | |
79 | | /* skip quoted sections */ |
80 | 0 | while ((c = *str)) { |
81 | |
|
82 | 0 | if (!q) { |
83 | 0 | if ('\'' == c) { |
84 | 0 | q = '\''; |
85 | 0 | rewind++; |
86 | 0 | } |
87 | 0 | else if ('\"' == c) { |
88 | 0 | q = '\"'; |
89 | 0 | rewind++; |
90 | 0 | } |
91 | 0 | else if (strchr(sep, c)) { |
92 | 0 | break; |
93 | 0 | } |
94 | 0 | else if (rewind) { |
95 | 0 | str[-rewind] = c; |
96 | 0 | } |
97 | 0 | } |
98 | 0 | else { |
99 | 0 | if (!s) { |
100 | 0 | if ('\\' == c) { |
101 | 0 | s = c; |
102 | 0 | rewind++; |
103 | 0 | } |
104 | 0 | else if (!s && q == c) { |
105 | 0 | rewind++; |
106 | 0 | q = 0; |
107 | 0 | } |
108 | 0 | else if (rewind) { |
109 | 0 | str[-rewind] = c; |
110 | 0 | } |
111 | 0 | } |
112 | 0 | else { |
113 | 0 | s = 0; |
114 | 0 | if (rewind) { |
115 | 0 | str[-rewind] = c; |
116 | 0 | } |
117 | 0 | } |
118 | 0 | } |
119 | | |
120 | 0 | str++; |
121 | 0 | } |
122 | |
|
123 | 0 | if (rewind) { |
124 | 0 | str[-rewind] = '\0'; |
125 | 0 | } |
126 | | |
127 | | /* prepare for the next call (will terminate at '\0) |
128 | | */ |
129 | 0 | *last = str; |
130 | |
|
131 | 0 | if (**last) { |
132 | 0 | **last = '\0'; |
133 | 0 | ++*last; |
134 | 0 | } |
135 | |
|
136 | 0 | return token; |
137 | 0 | } |
138 | | |