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abe211bf DM |
1 | /* |
2 | * Android c-library does not have getsubopt, | |
3 | * so code lifted from uClibc | |
4 | * http://git.uclibc.org/uClibc/tree/libc/unistd/getsubopt.c | |
5 | */ | |
6 | ||
7 | /* Parse comma separate list into words. | |
8 | Copyright (C) 1996, 1997, 1999, 2004 Free Software Foundation, Inc. | |
9 | This file is part of the GNU C Library. | |
10 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. | |
11 | The GNU C Library is free software; you can redistribute it and/or | |
12 | modify it under the terms of the GNU Lesser General Public | |
13 | License as published by the Free Software Foundation; either | |
14 | version 2.1 of the License, or (at your option) any later version. | |
15 | The GNU C Library is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | You should have received a copy of the GNU Lesser General Public | |
20 | License along with the GNU C Library; if not, write to the Free | |
21 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | 02111-1307 USA. */ | |
23 | ||
24 | ||
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | ||
28 | char *strchrnul(const char *s, int c) | |
29 | { | |
30 | char *result; | |
31 | ||
32 | result = strchr( s, c ); | |
33 | ||
34 | if( !result ) | |
35 | { | |
36 | result = (char *)s + strlen( s ); | |
37 | } | |
38 | ||
39 | return( result ); | |
40 | } | |
41 | ||
42 | /* Parse comma separated suboption from *OPTIONP and match against | |
43 | strings in TOKENS. If found return index and set *VALUEP to | |
44 | optional value introduced by an equal sign. If the suboption is | |
45 | not part of TOKENS return in *VALUEP beginning of unknown | |
46 | suboption. On exit *OPTIONP is set to the beginning of the next | |
47 | token or at the terminating NUL character. */ | |
48 | int | |
49 | getsubopt (char **optionp, char *const *tokens, char **valuep) | |
50 | { | |
51 | char *endp, *vstart; | |
52 | int cnt; | |
53 | ||
54 | if (**optionp == '\0') | |
55 | return -1; | |
56 | ||
57 | /* Find end of next token. */ | |
58 | endp = strchrnul (*optionp, ','); | |
59 | ||
60 | /* Find start of value. */ | |
61 | vstart = memchr (*optionp, '=', endp - *optionp); | |
62 | if (vstart == NULL) | |
63 | vstart = endp; | |
64 | ||
65 | /* Try to match the characters between *OPTIONP and VSTART against | |
66 | one of the TOKENS. */ | |
67 | for (cnt = 0; tokens[cnt] != NULL; ++cnt) | |
68 | if (strncmp (*optionp, tokens[cnt], vstart - *optionp) == 0 | |
69 | && tokens[cnt][vstart - *optionp] == '\0') | |
70 | { | |
71 | /* We found the current option in TOKENS. */ | |
72 | *valuep = vstart != endp ? vstart + 1 : NULL; | |
73 | ||
74 | if (*endp != '\0') | |
75 | *endp++ = '\0'; | |
76 | *optionp = endp; | |
77 | ||
78 | return cnt; | |
79 | } | |
80 | ||
81 | /* The current suboption does not match any option. */ | |
82 | *valuep = *optionp; | |
83 | ||
84 | if (*endp != '\0') | |
85 | *endp++ = '\0'; | |
86 | *optionp = endp; | |
87 | ||
88 | return -1; | |
89 | } |