Convert everything to c api

src/lib.cpp

@@ -1,25 +1,33 @@
 #include "parser3.h"
 #include "weaseljson.h"
 
+using namespace parser3;
+
 extern "C" {
 
-/** Create a parser. Increasing stack size increases memory usage but also
- * increases the depth of nested json accepted. `callbacks` and `data` must
- * outlive the returned parser. */
 __attribute__((visibility("default"))) WeaselJsonParser *
 WeaselJsonParser_create(int stackSize, const WeaselJsonCallbacks *callbacks,
-                        void *data) {}
-
-/** Restore the parser to its newly-created state */
-__attribute__((visibility("default"))) void
-WeaselJsonParser_reset(WeaselJsonParser *parser) {}
-
-/** Destroy the parser */
-__attribute__((visibility("default"))) void
-WeaselJsonParser_destroy(WeaselJsonParser *parser) {}
-
-/** Incrementally parse `len` more bytes starting at `buf`. `buf` may be
- * modified. Call with `len` 0 to indicate end of data */
-__attribute__((visibility("default"))) WeaselJsonStatus
-WeaselJsonParser_parse(WeaselJsonParser *parser, char *buf, int len) {}
+                        void *data) {
+  auto *buf = malloc(sizeof(Parser3) + stackSize);
+  if (buf == nullptr) {
+    return nullptr;
+  }
+  return (WeaselJsonParser *)new (buf) Parser3{callbacks, data, stackSize};
+}
+
+__attribute__((visibility("default"))) void
+WeaselJsonParser_reset(WeaselJsonParser *parser) {
+  ((Parser3 *)parser)->reset();
+}
+
+__attribute__((visibility("default"))) void
+WeaselJsonParser_destroy(WeaselJsonParser *parser) {
+  ((Parser3 *)parser)->~Parser3();
+  free(parser);
+}
+
+__attribute__((visibility("default"))) WeaselJsonStatus
+WeaselJsonParser_parse(WeaselJsonParser *parser, char *buf, int len) {
+  return ((Parser3 *)parser)->parse(buf, len);
+}
 }