json-util: Add JSON_BUILD_RATELIMIT()

src/libsystemd/sd-json/json-util.h

@@ -141,6 +141,7 @@ enum {
         _JSON_BUILD_STRING_ORDERED_SET,
         _JSON_BUILD_STRING_UNDERSCORIFY,
         _JSON_BUILD_DUAL_TIMESTAMP,
+        _JSON_BUILD_RATELIMIT,
 
         _JSON_BUILD_PAIR_UNSIGNED_NON_ZERO,
         _JSON_BUILD_PAIR_FINITE_USEC,
@@ -153,6 +154,7 @@ enum {
         _JSON_BUILD_PAIR_IN_ADDR_NON_NULL,
         _JSON_BUILD_PAIR_ETHER_ADDR_NON_NULL,
         _JSON_BUILD_PAIR_HW_ADDR_NON_NULL,
+        _JSON_BUILD_PAIR_RATELIMIT_ENABLED,
 
         _SD_JSON_BUILD_REALLYMAX,
 };
@@ -170,6 +172,7 @@ enum {
 #define JSON_BUILD_STRING_ORDERED_SET(s) _JSON_BUILD_STRING_ORDERED_SET, (OrderedSet *) { s }
 #define JSON_BUILD_STRING_UNDERSCORIFY(s) _JSON_BUILD_STRING_UNDERSCORIFY, (const char *) { s }
 #define JSON_BUILD_DUAL_TIMESTAMP(t) _JSON_BUILD_DUAL_TIMESTAMP, (dual_timestamp*) { t }
+#define JSON_BUILD_RATELIMIT(rl) _JSON_BUILD_RATELIMIT, (const RateLimit*) { rl }
 
 #define JSON_BUILD_PAIR_UNSIGNED_NON_ZERO(name, u) _JSON_BUILD_PAIR_UNSIGNED_NON_ZERO, (const char*) { name }, (uint64_t) { u }
 #define JSON_BUILD_PAIR_FINITE_USEC(name, u) _JSON_BUILD_PAIR_FINITE_USEC, (const char*) { name }, (usec_t) { u }
@@ -181,6 +184,7 @@ enum {
 #define JSON_BUILD_PAIR_IN_ADDR_NON_NULL(name, v, f) _JSON_BUILD_PAIR_IN_ADDR_NON_NULL, (const char*) { name }, (const union in_addr_union*) { v }, (int) { f }
 #define JSON_BUILD_PAIR_ETHER_ADDR_NON_NULL(name, v) _JSON_BUILD_PAIR_ETHER_ADDR_NON_NULL, (const char*) { name }, (const struct ether_addr*) { v }
 #define JSON_BUILD_PAIR_HW_ADDR_NON_NULL(name, v) _JSON_BUILD_PAIR_HW_ADDR_NON_NULL, (const char*) { name }, (const struct hw_addr_data*) { v }
+#define JSON_BUILD_PAIR_RATELIMIT_ENABLED(name, rl) _JSON_BUILD_PAIR_RATELIMIT_ENABLED, (const char*) { name }, (const RateLimit*) { rl }
 
 #define JSON_BUILD_PAIR_IOVEC_BASE64(name, iov) SD_JSON_BUILD_PAIR(name, JSON_BUILD_IOVEC_BASE64(iov))
 #define JSON_BUILD_PAIR_IOVEC_HEX(name, iov) SD_JSON_BUILD_PAIR(name, JSON_BUILD_IOVEC_HEX(iov))
@@ -191,3 +195,4 @@ enum {
 #define JSON_BUILD_PAIR_HW_ADDR(name, v) SD_JSON_BUILD_PAIR(name, JSON_BUILD_HW_ADDR(v))
 #define JSON_BUILD_PAIR_STRING_SET(name, s) SD_JSON_BUILD_PAIR(name, JSON_BUILD_STRING_SET(s))
 #define JSON_BUILD_PAIR_STRING_ORDERED_SET(name, s) SD_JSON_BUILD_PAIR(name, JSON_BUILD_STRING_ORDERED_SET(s))
+#define JSON_BUILD_PAIR_RATELIMIT(name, rl) SD_JSON_BUILD_PAIR(name, JSON_BUILD_RATELIMIT(rl))

src/libsystemd/sd-json/sd-json.c

@@ -4160,6 +4160,40 @@ _public_ int sd_json_buildv(sd_json_variant **ret, va_list ap) {
                         break;
                 }
 
+                case _JSON_BUILD_RATELIMIT: {
+                        const RateLimit *rl;
+
+                        if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) {
+                                r = -EINVAL;
+                                goto finish;
+                        }
+
+                        rl = va_arg(ap, const RateLimit*);
+
+                        if (current->n_suppress == 0) {
+                                if (ratelimit_configured(rl)) {
+                                        r = sd_json_buildo(
+                                                        &add,
+                                                        SD_JSON_BUILD_PAIR("intervalUSec", SD_JSON_BUILD_UNSIGNED(rl->interval)),
+                                                        SD_JSON_BUILD_PAIR("burst", SD_JSON_BUILD_UNSIGNED(rl->burst)));
+                                        if (r < 0)
+                                                goto finish;
+                                } else
+                                        add = JSON_VARIANT_MAGIC_NULL;
+                        }
+
+                        n_subtract = 1;
+
+                        if (current->expect == EXPECT_TOPLEVEL)
+                                current->expect = EXPECT_END;
+                        else if (current->expect == EXPECT_OBJECT_VALUE)
+                                current->expect = EXPECT_OBJECT_KEY;
+                        else
+                                assert(current->expect == EXPECT_ARRAY_ELEMENT);
+
+                        break;
+                }
+
                 case _SD_JSON_BUILD_CALLBACK: {
                         sd_json_build_callback_t cb;
                         void *userdata;
@@ -4574,6 +4608,36 @@ _public_ int sd_json_buildv(sd_json_variant **ret, va_list ap) {
                         current->expect = EXPECT_OBJECT_KEY;
                         break;
                 }
+
+                case _JSON_BUILD_PAIR_RATELIMIT_ENABLED: {
+                        const RateLimit *rl;
+                        const char *n;
+
+                        if (current->expect != EXPECT_OBJECT_KEY) {
+                                r = -EINVAL;
+                                goto finish;
+                        }
+
+                        n = va_arg(ap, const char*);
+                        rl = va_arg(ap, const RateLimit*);
+
+                        if (rl && ratelimit_configured(rl) && current->n_suppress == 0) {
+                                r = sd_json_variant_new_string(&add, n);
+                                if (r < 0)
+                                        goto finish;
+
+                                r = sd_json_buildo(&add_more,
+                                                SD_JSON_BUILD_PAIR("intervalUSec", SD_JSON_BUILD_UNSIGNED(rl->interval)),
+                                                SD_JSON_BUILD_PAIR("burst", SD_JSON_BUILD_UNSIGNED(rl->burst)));
+                                if (r < 0)
+                                        goto finish;
+                        }
+
+                        n_subtract = 2; /* we generated two item */
+
+                        current->expect = EXPECT_OBJECT_KEY;
+                        break;
+                }
                 }
 
                 /* If variants were generated, add them to our current variant, but only if we are not supposed to suppress additions */