cjson 1.7.12 (new formula)

Closes #40582.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/cjson.rb

@@ -0,0 +1,37 @@
+class Cjson < Formula
+  desc "Ultralightweight JSON parser in ANSI C"
+  homepage "https://github.com/DaveGamble/cJSON"
+  url "https://github.com/DaveGamble/cJSON/archive/v1.7.12.tar.gz"
+  sha256 "760687665ab41a5cff9c40b1053c19572bcdaadef1194e5cba1b5e6f824686e7"
+
+  depends_on "cmake" => :build
+
+  def install
+    system "cmake", "-DENABLE_CJSON_UTILS=On", "-DENABLE_CJSON_TEST=Off", ".",
+                    *std_cmake_args
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <cjson/cJSON.h>
+
+      int main()
+      {
+        char *s = "{\\"key\\":\\"value\\"}";
+        cJSON *json = cJSON_Parse(s);
+        if (!json) {
+            return 1;
+        }
+        cJSON *item = cJSON_GetObjectItem(json, "key");
+        if (!item) {
+            return 1;
+        }
+        cJSON_Delete(json);
+        return 0;
+      }
+    EOS
+    system ENV.cc, "-L#{lib}", "-lcjson", "test.c", "-o", "test"
+    system "./test"
+  end
+end