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/ctype.h" 16 #include "qapi/qmp/qerror.h" 17 18 const char *qapi_enum_lookup(const QEnumLookup *lookup, int val) 19 { 20 assert(val >= 0 && val < lookup->size); 21 22 return lookup->array[val]; 23 } 24 25 int qapi_enum_parse(const QEnumLookup *lookup, const char *buf, 26 int def, Error **errp) 27 { 28 int i; 29 30 if (!buf) { 31 return def; 32 } 33 34 for (i = 0; i < lookup->size; i++) { 35 if (!strcmp(buf, lookup->array[i])) { 36 return i; 37 } 38 } 39 40 error_setg(errp, "invalid parameter value: %s", buf); 41 return def; 42 } 43 44 bool qapi_bool_parse(const char *name, const char *value, bool *obj, Error **errp) 45 { 46 if (g_str_equal(value, "on") || 47 g_str_equal(value, "yes") || 48 g_str_equal(value, "true") || 49 g_str_equal(value, "y")) { 50 *obj = true; 51 return true; 52 } 53 if (g_str_equal(value, "off") || 54 g_str_equal(value, "no") || 55 g_str_equal(value, "false") || 56 g_str_equal(value, "n")) { 57 *obj = false; 58 return true; 59 } 60 61 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, 62 "'on' or 'off'"); 63 return false; 64 } 65 66 /* 67 * Parse a valid QAPI name from @str. 68 * A valid name consists of letters, digits, hyphen and underscore. 69 * It may be prefixed by __RFQDN_ (downstream extension), where RFQDN 70 * may contain only letters, digits, hyphen and period. 71 * The special exception for enumeration names is not implemented. 72 * See docs/devel/qapi-code-gen.txt for more on QAPI naming rules. 73 * Keep this consistent with scripts/qapi.py! 74 * If @complete, the parse fails unless it consumes @str completely. 75 * Return its length on success, -1 on failure. 76 */ 77 int parse_qapi_name(const char *str, bool complete) 78 { 79 const char *p = str; 80 81 if (*p == '_') { /* Downstream __RFQDN_ */ 82 p++; 83 if (*p != '_') { 84 return -1; 85 } 86 while (*++p) { 87 if (!qemu_isalnum(*p) && *p != '-' && *p != '.') { 88 break; 89 } 90 } 91 92 if (*p != '_') { 93 return -1; 94 } 95 p++; 96 } 97 98 if (!qemu_isalpha(*p)) { 99 return -1; 100 } 101 while (*++p) { 102 if (!qemu_isalnum(*p) && *p != '-' && *p != '_') { 103 break; 104 } 105 } 106 107 if (complete && *p) { 108 return -1; 109 } 110 return p - str; 111 } 112