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-rw-r--r--include/qemu/help_option.h11
-rw-r--r--include/qemu/option.h2
-rw-r--r--qapi/qobject-input-visitor.c2
-rw-r--r--storage-daemon/qemu-storage-daemon.c2
-rw-r--r--tests/test-keyval.c183
-rw-r--r--util/keyval.c63
6 files changed, 185 insertions, 78 deletions
diff --git a/include/qemu/help_option.h b/include/qemu/help_option.h
index 328d2a8..ca6389a 100644
--- a/include/qemu/help_option.h
+++ b/include/qemu/help_option.h
@@ -19,4 +19,15 @@ static inline bool is_help_option(const char *s)
return !strcmp(s, "?") || !strcmp(s, "help");
}
+static inline int starts_with_help_option(const char *s)
+{
+ if (*s == '?') {
+ return 1;
+ }
+ if (g_str_has_prefix(s, "help")) {
+ return 4;
+ }
+ return 0;
+}
+
#endif
diff --git a/include/qemu/option.h b/include/qemu/option.h
index 05e8a15..ac69352 100644
--- a/include/qemu/option.h
+++ b/include/qemu/option.h
@@ -149,6 +149,6 @@ void qemu_opts_free(QemuOptsList *list);
QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list);
QDict *keyval_parse(const char *params, const char *implied_key,
- Error **errp);
+ bool *help, Error **errp);
#endif
diff --git a/qapi/qobject-input-visitor.c b/qapi/qobject-input-visitor.c
index f918a05..7b184b5 100644
--- a/qapi/qobject-input-visitor.c
+++ b/qapi/qobject-input-visitor.c
@@ -757,7 +757,7 @@ Visitor *qobject_input_visitor_new_str(const char *str,
assert(args);
v = qobject_input_visitor_new(QOBJECT(args));
} else {
- args = keyval_parse(str, implied_key, errp);
+ args = keyval_parse(str, implied_key, NULL, errp);
if (!args) {
return NULL;
}
diff --git a/storage-daemon/qemu-storage-daemon.c b/storage-daemon/qemu-storage-daemon.c
index 1ae1cda..6f0e0cf 100644
--- a/storage-daemon/qemu-storage-daemon.c
+++ b/storage-daemon/qemu-storage-daemon.c
@@ -278,7 +278,7 @@ static void process_options(int argc, char *argv[])
}
qemu_opts_del(opts);
- args = keyval_parse(optarg, "qom-type", &error_fatal);
+ args = keyval_parse(optarg, "qom-type", NULL, &error_fatal);
user_creatable_add_dict(args, true, &error_fatal);
qobject_unref(args);
break;
diff --git a/tests/test-keyval.c b/tests/test-keyval.c
index 04c62cf..ee927fe 100644
--- a/tests/test-keyval.c
+++ b/tests/test-keyval.c
@@ -27,27 +27,28 @@ static void test_keyval_parse(void)
QDict *qdict, *sub_qdict;
char long_key[129];
char *params;
+ bool help;
/* Nothing */
- qdict = keyval_parse("", NULL, &error_abort);
+ qdict = keyval_parse("", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 0);
qobject_unref(qdict);
/* Empty key (qemu_opts_parse() accepts this) */
- qdict = keyval_parse("=val", NULL, &err);
+ qdict = keyval_parse("=val", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Empty key fragment */
- qdict = keyval_parse(".", NULL, &err);
+ qdict = keyval_parse(".", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
- qdict = keyval_parse("key.", NULL, &err);
+ qdict = keyval_parse("key.", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Invalid non-empty key (qemu_opts_parse() doesn't care) */
- qdict = keyval_parse("7up=val", NULL, &err);
+ qdict = keyval_parse("7up=val", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
@@ -56,25 +57,25 @@ static void test_keyval_parse(void)
long_key[127] = 'z';
long_key[128] = 0;
params = g_strdup_printf("k.%s=v", long_key);
- qdict = keyval_parse(params + 2, NULL, &err);
+ qdict = keyval_parse(params + 2, NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Overlong key fragment */
- qdict = keyval_parse(params, NULL, &err);
+ qdict = keyval_parse(params, NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
g_free(params);
/* Long key (qemu_opts_parse() accepts and truncates silently) */
params = g_strdup_printf("k.%s=v", long_key + 1);
- qdict = keyval_parse(params + 2, NULL, &error_abort);
+ qdict = keyval_parse(params + 2, NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
g_assert_cmpstr(qdict_get_try_str(qdict, long_key + 1), ==, "v");
qobject_unref(qdict);
/* Long key fragment */
- qdict = keyval_parse(params, NULL, &error_abort);
+ qdict = keyval_parse(params, NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
sub_qdict = qdict_get_qdict(qdict, "k");
g_assert(sub_qdict);
@@ -84,25 +85,25 @@ static void test_keyval_parse(void)
g_free(params);
/* Crap after valid key */
- qdict = keyval_parse("key[0]=val", NULL, &err);
+ qdict = keyval_parse("key[0]=val", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Multiple keys, last one wins */
- qdict = keyval_parse("a=1,b=2,,x,a=3", NULL, &error_abort);
+ qdict = keyval_parse("a=1,b=2,,x,a=3", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 2);
g_assert_cmpstr(qdict_get_try_str(qdict, "a"), ==, "3");
g_assert_cmpstr(qdict_get_try_str(qdict, "b"), ==, "2,x");
qobject_unref(qdict);
/* Even when it doesn't in qemu_opts_parse() */
- qdict = keyval_parse("id=foo,id=bar", NULL, &error_abort);
+ qdict = keyval_parse("id=foo,id=bar", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
g_assert_cmpstr(qdict_get_try_str(qdict, "id"), ==, "bar");
qobject_unref(qdict);
/* Dotted keys */
- qdict = keyval_parse("a.b.c=1,a.b.c=2,d=3", NULL, &error_abort);
+ qdict = keyval_parse("a.b.c=1,a.b.c=2,d=3", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 2);
sub_qdict = qdict_get_qdict(qdict, "a");
g_assert(sub_qdict);
@@ -115,48 +116,48 @@ static void test_keyval_parse(void)
qobject_unref(qdict);
/* Inconsistent dotted keys */
- qdict = keyval_parse("a.b=1,a=2", NULL, &err);
+ qdict = keyval_parse("a.b=1,a=2", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
- qdict = keyval_parse("a.b=1,a.b.c=2", NULL, &err);
+ qdict = keyval_parse("a.b=1,a.b.c=2", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Trailing comma is ignored */
- qdict = keyval_parse("x=y,", NULL, &error_abort);
+ qdict = keyval_parse("x=y,", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
g_assert_cmpstr(qdict_get_try_str(qdict, "x"), ==, "y");
qobject_unref(qdict);
/* Except when it isn't */
- qdict = keyval_parse(",", NULL, &err);
+ qdict = keyval_parse(",", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Value containing ,id= not misinterpreted as qemu_opts_parse() does */
- qdict = keyval_parse("x=,,id=bar", NULL, &error_abort);
+ qdict = keyval_parse("x=,,id=bar", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
g_assert_cmpstr(qdict_get_try_str(qdict, "x"), ==, ",id=bar");
qobject_unref(qdict);
/* Anti-social ID is left to caller (qemu_opts_parse() rejects it) */
- qdict = keyval_parse("id=666", NULL, &error_abort);
+ qdict = keyval_parse("id=666", NULL, NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
g_assert_cmpstr(qdict_get_try_str(qdict, "id"), ==, "666");
qobject_unref(qdict);
/* Implied value not supported (unlike qemu_opts_parse()) */
- qdict = keyval_parse("an,noaus,noaus=", NULL, &err);
+ qdict = keyval_parse("an,noaus,noaus=", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Implied value, key "no" (qemu_opts_parse(): negated empty key) */
- qdict = keyval_parse("no", NULL, &err);
+ qdict = keyval_parse("no", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Implied key */
- qdict = keyval_parse("an,aus=off,noaus=", "implied", &error_abort);
+ qdict = keyval_parse("an,aus=off,noaus=", "implied", NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 3);
g_assert_cmpstr(qdict_get_try_str(qdict, "implied"), ==, "an");
g_assert_cmpstr(qdict_get_try_str(qdict, "aus"), ==, "off");
@@ -164,7 +165,7 @@ static void test_keyval_parse(void)
qobject_unref(qdict);
/* Implied dotted key */
- qdict = keyval_parse("val", "eins.zwei", &error_abort);
+ qdict = keyval_parse("val", "eins.zwei", NULL, &error_abort);
g_assert_cmpuint(qdict_size(qdict), ==, 1);
sub_qdict = qdict_get_qdict(qdict, "eins");
g_assert(sub_qdict);
@@ -173,24 +174,81 @@ static void test_keyval_parse(void)
qobject_unref(qdict);
/* Implied key with empty value (qemu_opts_parse() accepts this) */
- qdict = keyval_parse(",", "implied", &err);
+ qdict = keyval_parse(",", "implied", NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Likewise (qemu_opts_parse(): implied key with comma value) */
- qdict = keyval_parse(",,,a=1", "implied", &err);
+ qdict = keyval_parse(",,,a=1", "implied", NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Implied key's value can't have comma (qemu_opts_parse(): it can) */
- qdict = keyval_parse("val,,ue", "implied", &err);
+ qdict = keyval_parse("val,,ue", "implied", NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Empty key is not an implied key */
- qdict = keyval_parse("=val", "implied", &err);
+ qdict = keyval_parse("=val", "implied", NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
+
+ /* "help" by itself, without implied key */
+ qdict = keyval_parse("help", NULL, &help, &error_abort);
+ g_assert_cmpuint(qdict_size(qdict), ==, 0);
+ g_assert(help);
+ qobject_unref(qdict);
+
+ /* "help" by itself, with implied key */
+ qdict = keyval_parse("help", "implied", &help, &error_abort);
+ g_assert_cmpuint(qdict_size(qdict), ==, 0);
+ g_assert(help);
+ qobject_unref(qdict);
+
+ /* "help" when no help is available, without implied key */
+ qdict = keyval_parse("help", NULL, NULL, &err);
+ error_free_or_abort(&err);
+ g_assert(!qdict);
+
+ /* "help" when no help is available, with implied key */
+ qdict = keyval_parse("help", "implied", NULL, &err);
+ error_free_or_abort(&err);
+ g_assert(!qdict);
+
+ /* Key "help" */
+ qdict = keyval_parse("help=on", NULL, &help, &error_abort);
+ g_assert_cmpuint(qdict_size(qdict), ==, 1);
+ g_assert_cmpstr(qdict_get_try_str(qdict, "help"), ==, "on");
+ g_assert(!help);
+ qobject_unref(qdict);
+
+ /* "help" followed by crap, without implied key */
+ qdict = keyval_parse("help.abc", NULL, &help, &err);
+ error_free_or_abort(&err);
+ g_assert(!qdict);
+
+ /* "help" followed by crap, with implied key */
+ qdict = keyval_parse("help.abc", "implied", &help, &err);
+ g_assert_cmpuint(qdict_size(qdict), ==, 1);
+ g_assert_cmpstr(qdict_get_try_str(qdict, "implied"), ==, "help.abc");
+ g_assert(!help);
+ qobject_unref(qdict);
+
+ /* "help" with other stuff, without implied key */
+ qdict = keyval_parse("number=42,help,foo=bar", NULL, &help, &error_abort);
+ g_assert_cmpuint(qdict_size(qdict), ==, 2);
+ g_assert_cmpstr(qdict_get_try_str(qdict, "number"), ==, "42");
+ g_assert_cmpstr(qdict_get_try_str(qdict, "foo"), ==, "bar");
+ g_assert(help);
+ qobject_unref(qdict);
+
+ /* "help" with other stuff, with implied key */
+ qdict = keyval_parse("val,help,foo=bar", "implied", &help, &error_abort);
+ g_assert_cmpuint(qdict_size(qdict), ==, 2);
+ g_assert_cmpstr(qdict_get_try_str(qdict, "implied"), ==, "val");
+ g_assert_cmpstr(qdict_get_try_str(qdict, "foo"), ==, "bar");
+ g_assert(help);
+ qobject_unref(qdict);
}
static void check_list012(QList *qlist)
@@ -215,26 +273,26 @@ static void test_keyval_parse_list(void)
QDict *qdict, *sub_qdict;
/* Root can't be a list */
- qdict = keyval_parse("0=1", NULL, &err);
+ qdict = keyval_parse("0=1", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* List elements need not be in order */
- qdict = keyval_parse("list.0=null,list.2=zwei,list.1=eins",
- NULL, &error_abort);
+ qdict = keyval_parse("list.0=null,list.2=zwei,list.1=eins", NULL, NULL,
+ &error_abort);
g_assert_cmpint(qdict_size(qdict), ==, 1);
check_list012(qdict_get_qlist(qdict, "list"));
qobject_unref(qdict);
/* Multiple indexes, last one wins */
qdict = keyval_parse("list.1=goner,list.0=null,list.01=eins,list.2=zwei",
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
g_assert_cmpint(qdict_size(qdict), ==, 1);
check_list012(qdict_get_qlist(qdict, "list"));
qobject_unref(qdict);
/* List at deeper nesting */
- qdict = keyval_parse("a.list.1=eins,a.list.00=null,a.list.2=zwei",
+ qdict = keyval_parse("a.list.1=eins,a.list.00=null,a.list.2=zwei", NULL,
NULL, &error_abort);
g_assert_cmpint(qdict_size(qdict), ==, 1);
sub_qdict = qdict_get_qdict(qdict, "a");
@@ -243,18 +301,19 @@ static void test_keyval_parse_list(void)
qobject_unref(qdict);
/* Inconsistent dotted keys: both list and dictionary */
- qdict = keyval_parse("a.b.c=1,a.b.0=2", NULL, &err);
+ qdict = keyval_parse("a.b.c=1,a.b.0=2", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
- qdict = keyval_parse("a.0.c=1,a.b.c=2", NULL, &err);
+ qdict = keyval_parse("a.0.c=1,a.b.c=2", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
/* Missing list indexes */
- qdict = keyval_parse("list.1=lonely", NULL, &err);
+ qdict = keyval_parse("list.1=lonely", NULL, NULL, &err);
error_free_or_abort(&err);
g_assert(!qdict);
- qdict = keyval_parse("list.0=null,list.2=eins,list.02=zwei", NULL, &err);
+ qdict = keyval_parse("list.0=null,list.2=eins,list.02=zwei", NULL, NULL,
+ &err);
error_free_or_abort(&err);
g_assert(!qdict);
}
@@ -266,7 +325,7 @@ static void test_keyval_visit_bool(void)
QDict *qdict;
bool b;
- qdict = keyval_parse("bool1=on,bool2=off", NULL, &error_abort);
+ qdict = keyval_parse("bool1=on,bool2=off", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -278,7 +337,7 @@ static void test_keyval_visit_bool(void)
visit_end_struct(v, NULL);
visit_free(v);
- qdict = keyval_parse("bool1=offer", NULL, &error_abort);
+ qdict = keyval_parse("bool1=offer", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -296,7 +355,7 @@ static void test_keyval_visit_number(void)
uint64_t u;
/* Lower limit zero */
- qdict = keyval_parse("number1=0", NULL, &error_abort);
+ qdict = keyval_parse("number1=0", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -307,7 +366,7 @@ static void test_keyval_visit_number(void)
visit_free(v);
/* Upper limit 2^64-1 */
- qdict = keyval_parse("number1=18446744073709551615,number2=-1",
+ qdict = keyval_parse("number1=18446744073709551615,number2=-1", NULL,
NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
@@ -321,8 +380,8 @@ static void test_keyval_visit_number(void)
visit_free(v);
/* Above upper limit */
- qdict = keyval_parse("number1=18446744073709551616",
- NULL, &error_abort);
+ qdict = keyval_parse("number1=18446744073709551616", NULL, NULL,
+ &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -332,8 +391,8 @@ static void test_keyval_visit_number(void)
visit_free(v);
/* Below lower limit */
- qdict = keyval_parse("number1=-18446744073709551616",
- NULL, &error_abort);
+ qdict = keyval_parse("number1=-18446744073709551616", NULL, NULL,
+ &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -343,8 +402,7 @@ static void test_keyval_visit_number(void)
visit_free(v);
/* Hex and octal */
- qdict = keyval_parse("number1=0x2a,number2=052",
- NULL, &error_abort);
+ qdict = keyval_parse("number1=0x2a,number2=052", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -357,8 +415,7 @@ static void test_keyval_visit_number(void)
visit_free(v);
/* Trailing crap */
- qdict = keyval_parse("number1=3.14,number2=08",
- NULL, &error_abort);
+ qdict = keyval_parse("number1=3.14,number2=08", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -378,7 +435,7 @@ static void test_keyval_visit_size(void)
uint64_t sz;
/* Lower limit zero */
- qdict = keyval_parse("sz1=0", NULL, &error_abort);
+ qdict = keyval_parse("sz1=0", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -394,7 +451,7 @@ static void test_keyval_visit_size(void)
qdict = keyval_parse("sz1=9007199254740991,"
"sz2=9007199254740992,"
"sz3=9007199254740993",
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -411,7 +468,7 @@ static void test_keyval_visit_size(void)
/* Close to signed upper limit 0x7ffffffffffffc00 (53 msbs set) */
qdict = keyval_parse("sz1=9223372036854774784," /* 7ffffffffffffc00 */
"sz2=9223372036854775295", /* 7ffffffffffffdff */
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -426,7 +483,7 @@ static void test_keyval_visit_size(void)
/* Close to actual upper limit 0xfffffffffffff800 (53 msbs set) */
qdict = keyval_parse("sz1=18446744073709549568," /* fffffffffffff800 */
"sz2=18446744073709550591", /* fffffffffffffbff */
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -441,7 +498,7 @@ static void test_keyval_visit_size(void)
/* Beyond limits */
qdict = keyval_parse("sz1=-1,"
"sz2=18446744073709550592", /* fffffffffffffc00 */
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -454,7 +511,7 @@ static void test_keyval_visit_size(void)
/* Suffixes */
qdict = keyval_parse("sz1=8b,sz2=1.5k,sz3=2M,sz4=0.1G,sz5=16777215T",
- NULL, &error_abort);
+ NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -473,7 +530,7 @@ static void test_keyval_visit_size(void)
visit_free(v);
/* Beyond limit with suffix */
- qdict = keyval_parse("sz1=16777216T", NULL, &error_abort);
+ qdict = keyval_parse("sz1=16777216T", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -483,7 +540,7 @@ static void test_keyval_visit_size(void)
visit_free(v);
/* Trailing crap */
- qdict = keyval_parse("sz1=0Z,sz2=16Gi", NULL, &error_abort);
+ qdict = keyval_parse("sz1=0Z,sz2=16Gi", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -502,7 +559,7 @@ static void test_keyval_visit_dict(void)
QDict *qdict;
int64_t i;
- qdict = keyval_parse("a.b.c=1,a.b.c=2,d=3", NULL, &error_abort);
+ qdict = keyval_parse("a.b.c=1,a.b.c=2,d=3", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -520,7 +577,7 @@ static void test_keyval_visit_dict(void)
visit_end_struct(v, NULL);
visit_free(v);
- qdict = keyval_parse("a.b=", NULL, &error_abort);
+ qdict = keyval_parse("a.b=", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -542,7 +599,7 @@ static void test_keyval_visit_list(void)
QDict *qdict;
char *s;
- qdict = keyval_parse("a.0=,a.1=I,a.2.0=II", NULL, &error_abort);
+ qdict = keyval_parse("a.0=,a.1=I,a.2.0=II", NULL, NULL, &error_abort);
/* TODO empty list */
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
@@ -566,7 +623,7 @@ static void test_keyval_visit_list(void)
visit_end_struct(v, NULL);
visit_free(v);
- qdict = keyval_parse("a.0=,b.0.0=head", NULL, &error_abort);
+ qdict = keyval_parse("a.0=,b.0.0=head", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -595,7 +652,7 @@ static void test_keyval_visit_optional(void)
bool present;
int64_t i;
- qdict = keyval_parse("a.b=1", NULL, &error_abort);
+ qdict = keyval_parse("a.b=1", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -631,7 +688,7 @@ static void test_keyval_visit_alternate(void)
* the string variant if there is one, else an error.
* TODO make it work for unambiguous cases like AltEnumBool below
*/
- qdict = keyval_parse("a=1,b=2,c=on", NULL, &error_abort);
+ qdict = keyval_parse("a=1,b=2,c=on", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
@@ -655,7 +712,7 @@ static void test_keyval_visit_any(void)
QList *qlist;
QString *qstr;
- qdict = keyval_parse("a.0=null,a.1=1", NULL, &error_abort);
+ qdict = keyval_parse("a.0=null,a.1=1", NULL, NULL, &error_abort);
v = qobject_input_visitor_new_keyval(QOBJECT(qdict));
qobject_unref(qdict);
visit_start_struct(v, NULL, NULL, 0, &error_abort);
diff --git a/util/keyval.c b/util/keyval.c
index 8f33a36..7f625ad 100644
--- a/util/keyval.c
+++ b/util/keyval.c
@@ -14,10 +14,11 @@
* KEY=VALUE,... syntax:
*
* key-vals = [ key-val { ',' key-val } [ ',' ] ]
- * key-val = key '=' val
+ * key-val = key '=' val | help
* key = key-fragment { '.' key-fragment }
* key-fragment = / [^=,.]+ /
* val = { / [^,]+ / | ',,' }
+ * help = 'help' | '?'
*
* Semantics defined by reduction to JSON:
*
@@ -54,6 +55,9 @@
*
* The length of any key-fragment must be between 1 and 127.
*
+ * If any key-val is help, the object is to be treated as a help
+ * request.
+ *
* Design flaw: there is no way to denote an empty array or non-root
* object. While interpreting "key absent" as empty seems natural
* (removing a key-val from the input string removes the member when
@@ -75,7 +79,7 @@
*
* key-vals = [ key-val-1st { ',' key-val } [ ',' ] ]
* key-val-1st = val-no-key | key-val
- * val-no-key = / [^=,]+ /
+ * val-no-key = / [^=,]+ / - help
*
* where val-no-key is syntactic sugar for implied-key=val-no-key.
*
@@ -89,6 +93,7 @@
#include "qapi/qmp/qlist.h"
#include "qapi/qmp/qstring.h"
#include "qemu/cutils.h"
+#include "qemu/help_option.h"
#include "qemu/option.h"
/*
@@ -162,15 +167,20 @@ static QObject *keyval_parse_put(QDict *cur,
}
/*
- * Parse one KEY=VALUE from @params, store result in @qdict.
+ * Parse one parameter from @params.
+ *
+ * If we're looking at KEY=VALUE, store result in @qdict.
* The first fragment of KEY applies to @qdict. Subsequent fragments
* apply to nested QDicts, which are created on demand. @implied_key
* is as in keyval_parse().
- * On success, return a pointer to the next KEY=VALUE, or else to '\0'.
+ *
+ * If we're looking at "help" or "?", set *help to true.
+ *
+ * On success, return a pointer to the next parameter, or else to '\0'.
* On failure, return NULL.
*/
static const char *keyval_parse_one(QDict *qdict, const char *params,
- const char *implied_key,
+ const char *implied_key, bool *help,
Error **errp)
{
const char *key, *key_end, *val_end, *s, *end;
@@ -184,11 +194,21 @@ static const char *keyval_parse_one(QDict *qdict, const char *params,
key = params;
val_end = NULL;
len = strcspn(params, "=,");
- if (implied_key && len && key[len] != '=') {
- /* Desugar implied key */
- key = implied_key;
- val_end = params + len;
- len = strlen(implied_key);
+ if (len && key[len] != '=') {
+ if (starts_with_help_option(key) == len) {
+ *help = true;
+ s = key + len;
+ if (*s == ',') {
+ s++;
+ }
+ return s;
+ }
+ if (implied_key) {
+ /* Desugar implied key */
+ key = implied_key;
+ val_end = params + len;
+ len = strlen(implied_key);
+ }
}
key_end = key + len;
@@ -398,21 +418,32 @@ static QObject *keyval_listify(QDict *cur, GSList *key_of_cur, Error **errp)
/*
* Parse @params in QEMU's traditional KEY=VALUE,... syntax.
+ *
* If @implied_key, the first KEY= can be omitted. @implied_key is
* implied then, and VALUE can't be empty or contain ',' or '='.
+ *
+ * A parameter "help" or "?" without a value isn't added to the
+ * resulting dictionary, but instead is interpreted as help request.
+ * All other options are parsed and returned normally so that context
+ * specific help can be printed.
+ *
+ * If @p_help is not NULL, store whether help is requested there.
+ * If @p_help is NULL and help is requested, fail.
+ *
* On success, return a dictionary of the parsed keys and values.
* On failure, store an error through @errp and return NULL.
*/
QDict *keyval_parse(const char *params, const char *implied_key,
- Error **errp)
+ bool *p_help, Error **errp)
{
QDict *qdict = qdict_new();
QObject *listified;
const char *s;
+ bool help = false;
s = params;
while (*s) {
- s = keyval_parse_one(qdict, s, implied_key, errp);
+ s = keyval_parse_one(qdict, s, implied_key, &help, errp);
if (!s) {
qobject_unref(qdict);
return NULL;
@@ -420,6 +451,14 @@ QDict *keyval_parse(const char *params, const char *implied_key,
implied_key = NULL;
}
+ if (p_help) {
+ *p_help = help;
+ } else if (help) {
+ error_setg(errp, "Help is not available for this option");
+ qobject_unref(qdict);
+ return NULL;
+ }
+
listified = keyval_listify(qdict, NULL, errp);
if (!listified) {
qobject_unref(qdict);
generated by cgit v1.1 at 2024-12-23 23:53:06 +0000