bsearch for tables too

Author: lewing

src/mono/browser/runtime/pinvoke.c

@@ -23,14 +23,17 @@ mono_wasm_pinvoke_vararg_stub (void)
 	/* This is just a stub used to mark vararg pinvokes */
 }
 
+int
+table_compare_name (const void *t1, const void *t2)
+{
+	return strcmp (((PinvokeTable*)t1)->name, ((PinvokeTable*)t2)->name);
+}
+
 void*
 wasm_dl_lookup_pinvoke_table (const char *name)
 {
-	for (int i = 0; i < sizeof (pinvoke_tables) / sizeof (PinvokeTable); ++i) {
-		if (!strcmp (name, pinvoke_tables [i].name))
-			return &pinvoke_tables [i];
-	}
-	return NULL;
+	PinvokeImport needle = { name, NULL };
+	return bsearch (&needle, pinvoke_tables, (sizeof (pinvoke_tables) / sizeof (PinvokeTable)), sizeof (PinvokeTable), table_compare_name);
 }
 
 int

src/mono/browser/runtime/runtime.c

@@ -263,7 +263,7 @@ wasm_dl_load (const char *name, int flags, char **err, void *user_data)
 }
 
 int
-import_compare_key (const void *k1, const void *k2)
+import_compare_name (const void *k1, const void *k2)
 {
 	const PinvokeImport *e1 = (const PinvokeImport*)k1;
 	const PinvokeImport *e2 = (const PinvokeImport*)k2;
@@ -282,19 +282,12 @@ wasm_dl_symbol (void *handle, const char *name, char **err, void *user_data)
 	}
 #endif
 	PinvokeTable* index = (PinvokeTable*)handle;
-	int i = 0;
-
-	assert(wasm_dl_is_pinvoke_table (handle));
-	for (i = 0; index->imports[i].name != NULL; ++i) {}
-	assert (i == index->count);
-
 	PinvokeImport key = { name, NULL };
-    PinvokeImport* result = (PinvokeImport *)bsearch(&key, index->imports, index->count, sizeof(PinvokeImport), import_compare_key);
+    PinvokeImport* result = (PinvokeImport *)bsearch(&key, index->imports, index->count, sizeof(PinvokeImport), import_compare_name);
     if (!result) {
         // *err = g_strdup_printf ("Symbol not found: %s", name);
         return NULL;
     }
-
     return result->func;
 }
 

src/tasks/WasmAppBuilder/PInvokeTableGenerator.cs

@@ -43,7 +43,7 @@ public void ScanAssembly(Assembly asm)
 
     public IEnumerable<string> Generate(string[] pinvokeModules, string outputPath)
     {
-        var modules = new Dictionary<string, string>();
+        var modules = new SortedDictionary<string, string>(StringComparer.Ordinal);
         foreach (var module in pinvokeModules)
             modules[module] = module;
 
@@ -62,7 +62,7 @@ public IEnumerable<string> Generate(string[] pinvokeModules, string outputPath)
         return signatures;
     }
 
-    private void EmitPInvokeTable(StreamWriter w, Dictionary<string, string> modules, List<PInvoke> pinvokes)
+    private void EmitPInvokeTable(StreamWriter w, SortedDictionary<string, string> modules, List<PInvoke> pinvokes)
     {
 
         foreach (var pinvoke in pinvokes)
@@ -99,8 +99,8 @@ private void EmitPInvokeTable(StreamWriter w, Dictionary<string, string> modules
 
         var pinvokesGroupedByEntryPoint = pinvokes
                                             .Where(l => modules.ContainsKey(l.Module))
-                                            .OrderBy(l => l.EntryPoint)
-                                            .GroupBy(CEntryPoint);
+                                            .OrderBy(l => l.EntryPoint, StringComparer.Ordinal)
+                                            .GroupBy(CEntryPoint, StringComparer.Ordinal);
         var comparer = new PInvokeComparer();
         foreach (IGrouping<string, PInvoke> group in pinvokesGroupedByEntryPoint)
         {
@@ -348,7 +348,6 @@ private void EmitNativeToInterp(StreamWriter w, List<PInvokeCallback> callbacks)
             callbackNames.Add(cb.EntrySymbol);
             if (keys.Contains(cb.Key))
             {
-
                 Error($"Two callbacks with the same Name and number of arguments '{cb.Key}' are not supported.");
             }
             keys.Add(cb.Key);