Simplify and clean up

src/json_commit_request_parser.cpp

@@ -1,5 +1,6 @@
 #include "json_commit_request_parser.hpp"
 #include "json_token_enum.hpp"
+#include <cassert>
 #include <charconv>
 #include <cstring>
 #include <simdutf.h>
@@ -467,13 +468,15 @@ bool JsonCommitRequestParser::begin_streaming_parse(CommitRequest &request) {
   if (!parser_context_) {
     parser_context_ = std::make_unique<ParserContext>(&request.arena());
   } else {
-    parser_context_->reset_arena_memory(&request.arena());
+    parser_context_->attach_arena(&request.arena());
     parser_context_->parse_error = nullptr;
     parser_context_->parse_complete = false;
     parser_context_->has_read_version_been_set = false;
   }
 
-  if (json_parser_) {
+  if (!json_parser_) {
+    json_parser_ = WeaselJsonParser_create(64, &json_callbacks, this, 0);
+  } else {
     WeaselJsonParser_reset(json_parser_);
   }
 
@@ -482,6 +485,7 @@ bool JsonCommitRequestParser::begin_streaming_parse(CommitRequest &request) {
 
 JsonCommitRequestParser::ParseStatus
 JsonCommitRequestParser::parse_chunk(char *data, size_t len) {
+  assert(len != 0);
   if (!json_parser_ || !parser_context_) {
     return ParseStatus::Error;
   }
@@ -503,12 +507,15 @@ JsonCommitRequestParser::parse_chunk(char *data, size_t len) {
   case WeaselJson_AGAIN:
     return ParseStatus::Incomplete;
   case WeaselJson_REJECT:
+    parser_context_->parse_error = "JSON parsing failed - Invalid JSON";
+    return ParseStatus::Error;
   case WeaselJson_OVERFLOW:
-  default:
-    parser_context_->parse_error =
-        "JSON parsing failed - invalid or oversized JSON";
+    parser_context_->parse_error = "JSON parsing failed - JSON nested too deep";
     return ParseStatus::Error;
   }
+  parser_context_->parse_error =
+      "JSON parsing failed - unknown weasel json status";
+  return ParseStatus::Error;
 }
 
 JsonCommitRequestParser::ParseStatus
@@ -526,8 +533,6 @@ JsonCommitRequestParser::finish_streaming_parse() {
 
   if (status == WeaselJson_OK && parser_context_->parse_complete &&
       !parser_context_->parse_error) {
-    // Clear the memory used only during parsing
-    parser_context_->reset_arena_memory(&current_request_->arena());
     return ParseStatus::Complete;
   } else {
     parser_context_->parse_error =
@@ -536,14 +541,10 @@ JsonCommitRequestParser::finish_streaming_parse() {
   }
 }
 
-bool JsonCommitRequestParser::has_parse_error() const {
-  return parser_context_ && parser_context_->parse_error != nullptr;
-}
-
 const char *JsonCommitRequestParser::get_parse_error() const {
   return parser_context_ ? parser_context_->parse_error : nullptr;
 }
 
 bool JsonCommitRequestParser::has_read_version_been_set() const {
   return parser_context_ && parser_context_->has_read_version_been_set;
-}
+}

src/json_commit_request_parser.hpp

@@ -77,7 +77,7 @@ private:
       has_read_version_been_set = false;
     }
 
-    void reset_arena_memory(ArenaAllocator *arena) {
+    void attach_arena(ArenaAllocator *arena) {
       current_key = ArenaString{ArenaStlAllocator<char>(arena)};
       current_string = ArenaString{ArenaStlAllocator<char>(arena)};
       current_number = ArenaString{ArenaStlAllocator<char>(arena)};
@@ -116,7 +116,6 @@ public:
   bool begin_streaming_parse(CommitRequest &request) override;
   ParseStatus parse_chunk(char *data, size_t len) override;
   ParseStatus finish_streaming_parse() override;
-  bool has_parse_error() const override;
   const char *get_parse_error() const override;
 
   /**

src/parser_interface.hpp

@@ -38,7 +38,7 @@ public:
   /**
    * @brief Parse additional data incrementally.
    * @param data Pointer to the data buffer
-   * @param len Length of the data
+   * @param len Length of the data. Must be non-zero.
    * @return ParseStatus indicating current parse state
    */
   virtual ParseStatus parse_chunk(char *data, size_t len) = 0;
@@ -53,11 +53,11 @@ public:
    * @brief Check if there was a parse error.
    * @return true if there was a parse error
    */
-  virtual bool has_parse_error() const = 0;
+  bool has_parse_error() const { return get_parse_error(); };
 
   /**
    * @brief Get the parse error message if there was an error.
    * @return Error message string, or nullptr if no error
    */
   virtual const char *get_parse_error() const = 0;
-};
+};