aboutsummaryrefslogtreecommitdiff
path: root/qapi/qapi-util.c
blob: 29a6c98b53882ee8df978feec1d608ecef1a9fa9 (plain)
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
/*
 * QAPI util functions
 *
 * Authors:
 *  Hu Tao       <hutao@cn.fujitsu.com>
 *  Peter Lieven <pl@kamp.de>
 * 
 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 * See the COPYING.LIB file in the top-level directory.
 *
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/ctype.h"

const char *qapi_enum_lookup(const QEnumLookup *lookup, int val)
{
    assert(val >= 0 && val < lookup->size);

    return lookup->array[val];
}

int qapi_enum_parse(const QEnumLookup *lookup, const char *buf,
                    int def, Error **errp)
{
    int i;

    if (!buf) {
        return def;
    }

    for (i = 0; i < lookup->size; i++) {
        if (!strcmp(buf, lookup->array[i])) {
            return i;
        }
    }

    error_setg(errp, "invalid parameter value: %s", buf);
    return def;
}

/*
 * Parse a valid QAPI name from @str.
 * A valid name consists of letters, digits, hyphen and underscore.
 * It may be prefixed by __RFQDN_ (downstream extension), where RFQDN
 * may contain only letters, digits, hyphen and period.
 * The special exception for enumeration names is not implemented.
 * See docs/devel/qapi-code-gen.txt for more on QAPI naming rules.
 * Keep this consistent with scripts/qapi.py!
 * If @complete, the parse fails unless it consumes @str completely.
 * Return its length on success, -1 on failure.
 */
int parse_qapi_name(const char *str, bool complete)
{
    const char *p = str;

    if (*p == '_') {            /* Downstream __RFQDN_ */
        p++;
        if (*p != '_') {
            return -1;
        }
        while (*++p) {
            if (!qemu_isalnum(*p) && *p != '-' && *p != '.') {
                break;
            }
        }

        if (*p != '_') {
            return -1;
        }
        p++;
    }

    if (!qemu_isalpha(*p)) {
        return -1;
    }
    while (*++p) {
        if (!qemu_isalnum(*p) && *p != '-' && *p != '_') {
            break;
        }
    }

    if (complete && *p) {
        return -1;
    }
    return p - str;
}