2  * Parsing KEY=VALUE,... strings
14  * KEY=VALUE,... syntax:
16  *   key-vals     = [ key-val { ',' key-val } [ ',' ] ]
17  *   key-val      = key '=' val | help
18  *   key          = key-fragment { '.' key-fragment }
19  *   key-fragment = qapi-name | index
27  *   key-vals specifies a JSON object, i.e. a tree whose root is an
31  *   Each key-val = key-fragment '.' ... '=' val specifies a path from
36  *       L '.' key-fragment is a child of the node denoted by path L
37  *       key-fragment is a child of the tree root
38  *   If key-fragment is numeric, the parent is an array and the child
39  *   is its key-fragment-th member, counting from zero.
41  *   key-fragment.
52  *   If multiple key-val denote the same leaf, the last one determines
55  * Key-fragments must be valid QAPI names or consist only of decimal
58  * The length of any key-fragment must be between 1 and 127.
60  * If any key-val is help, the object is to be treated as a help
64  * object.  While interpreting "key absent" as empty seems natural
65  * (removing a key-val from the input string removes the member when
67  * "key absent" already means "optional object/array absent", which
80  * Alternative syntax for use with an implied key:
82  *   key-vals     = [ key-val-1st { ',' key-val } [ ',' ] ]
83  *   key-val-1st  = val-no-key | key-val
84  *   val-no-key   = / [^=,]+ / - help
86  * where val-no-key is syntactic sugar for implied-key=val-no-key.
102  * Convert @key to a list index.
113 static int key_to_index(const char *key, const char **end)  in key_to_index()  argument
118     if (*key < '0' || *key > '9') {  in key_to_index()
121     ret = qemu_strtoul(key, end, 10, &index);  in key_to_index()
141  * Use @key up to @key_cursor to identify the key in error messages.
147                                  const char *key, const char *key_cursor,  in keyval_parse_put()  argument
156                        (int)(key_cursor - key), key);  in keyval_parse_put()
174  * If we're looking at KEY=VALUE, store result in @qdict.
175  * The first fragment of KEY applies to @qdict.  Subsequent fragments
188     const char *key, *key_end, *val_end, *s, *end;  in keyval_parse_one()  local
196     key = params;  in keyval_parse_one()
199     if (len && key[len] != '=') {  in keyval_parse_one()
200         if (starts_with_help_option(key) == len) {  in keyval_parse_one()
202             s = key + len;  in keyval_parse_one()
209             /* Desugar implied key */  in keyval_parse_one()
210             key = implied_key;  in keyval_parse_one()
215     key_end = key + len;  in keyval_parse_one()
218      * Loop over key fragments: @s points to current fragment, it  in keyval_parse_one()
222     s = key;  in keyval_parse_one()
224         /* Want a key index (unless it's first) or a QAPI name */  in keyval_parse_one()
225         if (s != key && key_to_index(s, &end) >= 0) {  in keyval_parse_one()
233             assert(key != implied_key);  in keyval_parse_one()
235                        (int)(key_end - key), key);  in keyval_parse_one()
239             assert(key != implied_key);  in keyval_parse_one()
241                        s != key || s + len != key_end ? " fragment" : "",  in keyval_parse_one()
246         if (s != key) {  in keyval_parse_one()
248                                     key, s - 1, errp);  in keyval_parse_one()
266     if (key == implied_key) {  in keyval_parse_one()
276                        (int)(s - key), key);  in keyval_parse_one()
296                           key, key_end, errp)) {  in keyval_parse_one()
302 static char *reassemble_key(GSList *key)  in reassemble_key()  argument
307     for (p = key; p; p = p->next) {  in reassemble_key()
329         old_value = qdict_get(dest, ent->key);  in keyval_do_merge()
333                            str->str, ent->key);  in keyval_do_merge()
337                 g_string_append(str, ent->key);  in keyval_do_merge()
360         qdict_put_obj(dest, ent->key, ent->value);  in keyval_do_merge()
398  * @key_of_cur is the list of key fragments leading up to @cur.
409     char *key;  in keyval_listify()  local
424         if (key_to_index(ent->key, NULL) >= 0) {  in keyval_listify()
435         key_node.data = ent->key;  in keyval_listify()
441             qdict_put_obj(cur, ent->key, val);  in keyval_listify()
446         key = reassemble_key(key_of_cur);  in keyval_listify()
447         error_setg(errp, "Parameters '%s*' used inconsistently", key);  in keyval_listify()
448         g_free(key);  in keyval_listify()
460         index = key_to_index(ent->key, NULL);  in keyval_listify()
487             key = reassemble_key(key_of_cur);  in keyval_listify()
488             error_setg(errp, "Parameter '%s%d' missing", key, i);  in keyval_listify()
489             g_free(key);  in keyval_listify()
503  * Parse @params in QEMU's traditional KEY=VALUE,... syntax.
505  * If @implied_key, the first KEY= can be omitted.  @implied_key is
553  * Parse @params in QEMU's traditional KEY=VALUE,... syntax.
555  * If @implied_key, the first KEY= can be omitted.  @implied_key is