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 17 const char *qapi_enum_lookup(const QEnumLookup *lookup, int val) 18 { 19 assert(val >= 0 && val < lookup->size); 20 21 return lookup->array[val]; 22 } 23 24 int qapi_enum_parse(const QEnumLookup *lookup, const char *buf, 25 int def, Error **errp) 26 { 27 int i; 28 29 if (!buf) { 30 return def; 31 } 32 33 for (i = 0; i < lookup->size; i++) { 34 if (!strcmp(buf, lookup->array[i])) { 35 return i; 36 } 37 } 38 39 error_setg(errp, "invalid parameter value: %s", buf); 40 return def; 41 } 42 43 /* 44 * Parse a valid QAPI name from @str. 45 * A valid name consists of letters, digits, hyphen and underscore. 46 * It may be prefixed by __RFQDN_ (downstream extension), where RFQDN 47 * may contain only letters, digits, hyphen and period. 48 * The special exception for enumeration names is not implemented. 49 * See docs/devel/qapi-code-gen.txt for more on QAPI naming rules. 50 * Keep this consistent with scripts/qapi.py! 51 * If @complete, the parse fails unless it consumes @str completely. 52 * Return its length on success, -1 on failure. 53 */ 54 int parse_qapi_name(const char *str, bool complete) 55 { 56 const char *p = str; 57 58 if (*p == '_') { /* Downstream __RFQDN_ */ 59 p++; 60 if (*p != '_') { 61 return -1; 62 } 63 while (*++p) { 64 if (!qemu_isalnum(*p) && *p != '-' && *p != '.') { 65 break; 66 } 67 } 68 69 if (*p != '_') { 70 return -1; 71 } 72 p++; 73 } 74 75 if (!qemu_isalpha(*p)) { 76 return -1; 77 } 78 while (*++p) { 79 if (!qemu_isalnum(*p) && *p != '-' && *p != '_') { 80 break; 81 } 82 } 83 84 if (complete && *p) { 85 return -1; 86 } 87 return p - str; 88 } 89