From 6ebf2545d63d99d7595c482ef3949719843873d5 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Sun, 19 Jan 2020 11:49:49 +0100
Subject: [PATCH] web: get_value function

---
 hyperweb.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hyperweb.cpp b/hyperweb.cpp
index d8b5c4e3..b393b2b1 100644
--- a/hyperweb.cpp
+++ b/hyperweb.cpp
@@ -51,12 +51,29 @@ namespace hr {
   void loadCompressedChar(int &otwidth, int &otheight, int *tpix);
 
   const char *wheresounds;
+
+  std::string get_value(std::string name);
   }
 
 #include "hyper.cpp"
 
 namespace hr {
 
+string get_value(string name) {
+  char *str = (char*)EM_ASM_INT({
+    var name = UTF8ToString($0, $1);
+    var value = document.getElementById(name).value;
+    var lengthBytes = lengthBytesUTF8(value)+1;
+    var stringOnWasmHeap = _malloc(lengthBytes);
+    stringToUTF8(value, stringOnWasmHeap, lengthBytes);
+    return stringOnWasmHeap;
+    }, name.c_str(), int(name.size())
+    );
+  string res = str;
+  free(str);
+  return res;
+  }
+
 // -- demo --
 
 #if CAP_URL