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 } 83