qapi/qapi-util.c

   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/devel/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 }