add makefile and bindings

Author: kripken

Makefile

@@ -0,0 +1,9 @@
+# Edit for your paths
+EMSCRIPTEN=~/Dev/2emscripten
+EMCC=$(EMSCRIPTEN)/emcc
+
+all: sql.js
+
+sql.js: sqlite3.c
+	$(EMCC) -O1 sqlite3.c --post-js bindings.js -o sql.js
+

bindings.js

@@ -0,0 +1,37 @@
+var apiTemp = Runtime.stackAlloc(4);
+
+Module['open'] = function(filename) {
+  var ret = Module['ccall']('sqlite3_open', 'number', ['string', 'number'], [filename, apiTemp]);
+  if (ret) throw 'SQLite exception: ' + ret;
+  return getValue(apiTemp, 'i32');
+}
+
+Module['close'] = function(db) {
+  var ret = Module['ccall']('sqlite3_close', 'number', ['number'], [db]);
+  if (ret) throw 'SQLite exception: ' + ret;
+}
+
+var callbackTemp = FUNCTION_TABLE.length;
+FUNCTION_TABLE.push(0, 0);
+
+Module['exec'] = function(db, sql, callback) {
+  setValue(apiTemp, 0, 'i32');
+  FUNCTION_TABLE[callbackTemp] = function(notUsed, argc, argv, colNames) {
+    var data = [];
+    for (var i = 0; i < argc; i++) {
+      data.push({
+        column: Pointer_stringify(getValue(colNames + i*Runtime.QUANTUM_SIZE, 'i32')),
+        value: Pointer_stringify(getValue(argv + i*Runtime.QUANTUM_SIZE, 'i32'))
+      });
+    }
+    callback(data);
+  };
+  var ret = Module['ccall']('sqlite3_exec', 'number', ['number', 'string', 'number', 'number', 'number'], [db, sql, callbackTemp, 0, apiTemp]);
+  var errPtr = getValue(apiTemp, 'i32');
+  if (ret || errPtr) {
+    var msg = 'SQLite exception: ' + ret + ', ' + (errPtr ? Pointer_stringify(errPtr) : '');
+    if (errPtr) _sqlite3_free(errPtr);
+    throw msg;
+  }
+}
+