diff options
| -rw-r--r-- | include/qemu/help_option.h | 11 | ||||
| -rw-r--r-- | include/qemu/option.h | 2 | ||||
| -rw-r--r-- | qapi/qobject-input-visitor.c | 2 | ||||
| -rw-r--r-- | storage-daemon/qemu-storage-daemon.c | 2 | ||||
| -rw-r--r-- | tests/test-keyval.c | 183 | ||||
| -rw-r--r-- | util/keyval.c | 63 |
6 files changed, 185 insertions, 78 deletions
diff --git a/include/qemu/help_option.h b/include/qemu/help_option.h index 328d2a89fd..ca6389a154 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 05e8a15c73..ac69352e0e 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 f918a05e5f..7b184b50a7 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 1ae1cda481..6f0e0cfb36 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 04c62cf045..ee927fe4e4 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 8f33a36a7c..7f625ad33c 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); |