1 files changed, 76 insertions, 0 deletions
diff --git a/source/core/StarJsonPath.cpp b/source/core/StarJsonPath.cpp
new file mode 100644
index 0000000..9eb5fae
--- /dev/null
+++ b/source/core/StarJsonPath.cpp
@@ -0,0 +1,76 @@
+#include "StarJsonPath.hpp"
+
+namespace Star {
+
+namespace JsonPath {
+
+  TypeHint parsePointer(String& buffer, String const& path, String::const_iterator& iterator, String::const_iterator end) {
+    buffer.clear();
+
+    if (*iterator != '/')
+      throw ParsingException::format("Missing leading '/' in Json pointer \"%s\"", path);
+    iterator++;
+
+    while (iterator != end && *iterator != '/') {
+      if (*iterator == '~') {
+        ++iterator;
+        if (iterator == end)
+          throw ParsingException::format("Incomplete escape sequence in Json pointer \"%s\"", path);
+
+        if (*iterator == '0')
+          buffer.append('~');
+        else if (*iterator == '1')
+          buffer.append('/');
+        else
+          throw ParsingException::format("Invalid escape sequence in Json pointer \"%s\"", path);
+        ++iterator;
+      } else
+        buffer.append(*iterator++);
+    }
+
+    Maybe<size_t> index = maybeLexicalCast<size_t>(buffer);
+    if (index.isValid() || (buffer == "-" && iterator == end))
+      return TypeHint::Array;
+    return TypeHint::Object;
+  }
+
+  TypeHint parseQueryPath(String& buffer, String const& path, String::const_iterator& iterator, String::const_iterator end) {
+    buffer.clear();
+
+    if (*iterator == '.') {
+      throw ParsingException::format("Entry starts with '.' in query path \"%s\"", path);
+
+    } else if (*iterator == '[') {
+      // Parse array number and ']'
+      // Consume initial '['
+      ++iterator;
+
+      while (iterator != end && *iterator >= '0' && *iterator <= '9')
+        buffer.append(*iterator++);
+
+      if (iterator == end || *iterator != ']')
+        throw ParsingException::format("Array has no trailing ']' or has invalid character in query path \"%s\"", path);
+
+      // Consume trailing ']'
+      ++iterator;
+
+      // Consume trailing '.'
+      if (iterator != end && *iterator == '.')
+        ++iterator;
+
+      return TypeHint::Array;
+
+    } else {
+      // Parse path up to next '.' or '['
+      while (iterator != end && *iterator != '.' && *iterator != '[')
+        buffer.append(*iterator++);
+
+      // Consume single trailing '.' if it exists
+      if (iterator != end && *iterator == '.')
+        ++iterator;
+      return TypeHint::Object;
+    }
+  }
+}
+
+}