xref: /openbmc/qemu/qapi/qapi-util.c (revision 3f53bc61)
1 /*
2  * QAPI util functions
3  *
4  * Authors:
5  *  Hu Tao       <hutao@cn.fujitsu.com>
6  *  Peter Lieven <pl@kamp.de>
7  *
8  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
9  * See the COPYING.LIB file in the top-level directory.
10  *
11  */
12 
13 #include "qemu/osdep.h"
14 #include "qapi/error.h"
15 #include "qemu-common.h"
16 #include "qapi/util.h"
17 
18 int qapi_enum_parse(const char * const lookup[], const char *buf,
19                     int max, int def, Error **errp)
20 {
21     int i;
22 
23     if (!buf) {
24         return def;
25     }
26 
27     for (i = 0; i < max; i++) {
28         if (!strcmp(buf, lookup[i])) {
29             return i;
30         }
31     }
32 
33     error_setg(errp, "invalid parameter value: %s", buf);
34     return def;
35 }
36 
37 /*
38  * Parse a valid QAPI name from @str.
39  * A valid name consists of letters, digits, hyphen and underscore.
40  * It may be prefixed by __RFQDN_ (downstream extension), where RFQDN
41  * may contain only letters, digits, hyphen and period.
42  * The special exception for enumeration names is not implemented.
43  * See docs/qapi-code-gen.txt for more on QAPI naming rules.
44  * Keep this consistent with scripts/qapi.py!
45  * If @complete, the parse fails unless it consumes @str completely.
46  * Return its length on success, -1 on failure.
47  */
48 int parse_qapi_name(const char *str, bool complete)
49 {
50     const char *p = str;
51 
52     if (*p == '_') {            /* Downstream __RFQDN_ */
53         p++;
54         if (*p != '_') {
55             return -1;
56         }
57         while (*++p) {
58             if (!qemu_isalnum(*p) && *p != '-' && *p != '.') {
59                 break;
60             }
61         }
62 
63         if (*p != '_') {
64             return -1;
65         }
66         p++;
67     }
68 
69     if (!qemu_isalpha(*p)) {
70         return -1;
71     }
72     while (*++p) {
73         if (!qemu_isalnum(*p) && *p != '-' && *p != '_') {
74             break;
75         }
76     }
77 
78     if (complete && *p) {
79         return -1;
80     }
81     return p - str;
82 }
83