Fix error whenparses the value of 5E-324 with libc++

Signed-off-by: fangyunzhong <fangyunzhong2@huawei.com>

Fix error whenparses the value of 5E-324 with libc++.patch

@@ -0,0 +1,17 @@
+diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
+index f233abb..8f4c544 100755
+--- a/src/lib_json/json_reader.cpp
++++ b/src/lib_json/json_reader.cpp
+@@ -1666,6 +1666,12 @@ bool OurReader::decodeDouble(Token& token, Value& decoded) {
+   const String buffer(token.start_, token.end_);
+   IStringStream is(buffer);
+   if (!(is >> value)) {
++    // the value could be lower than numeric_limits<double>::min(), in this situtation we should return the value with the gurantee
++    // of conversion which has been performed and no occurances of range error.
++    if ((value > 0 && value < std::numeric_limits<double>::min()) || (value < 0 && value > -std::numeric_limits<double>::min())) {
++      decoded = value;
++      return true;
++    }
+     return addError(
+         "'" + String(token.start_, token.end_) + "' is not a number.", token);
+   }

install.py

@@ -47,7 +47,7 @@ def apply_patch(patch_file, target_dir):
 
 
 def do_patch(args, target_dir):
-    patch_file = []
+    patch_file = [ "Fix error whenparses the value of 5E-324 with libc++.patch" ]
 
     for patch in patch_file:
         file_path = os.path.join(args.source_file, patch)
@@ -62,6 +62,7 @@ def main():
     tar_file_path = os.path.join(args.source_file, "jsoncpp-1.9.5.tar.gz")
     target_dir = os.path.join(args.gen_dir, "jsoncpp-1.9.5")
     untar_file(tar_file_path, target_dir, args)
+    do_patch(args, target_dir)
     return 0