Simplify repl args logic

platforms/app/main.c

@@ -111,9 +111,7 @@ void print_usage() {
     puts("Usage:");
     puts("  wasm3 <file> [args...]");
     puts("  wasm3 --func <function> <file> [args...]");
-    puts("Repl usage:");
-    puts("  wasm3 --repl [file] [function] [args...]");
-    puts("  wasm3 --repl --func <function> <file> [args...]");
+    puts("  wasm3 --repl [file]");
 }
 
 #define ARGV_SHIFT()  { i_argc--; i_argv++; }
@@ -125,7 +123,7 @@ int  main  (int i_argc, const char* i_argv[])
     IM3Runtime env = NULL;
     bool argRepl = false;
     const char* argFile = NULL;
-    const char* argFunc = NULL;
+    const char* argFunc = "_start";
 
 //    m3_PrintM3Info ();
 
@@ -150,19 +148,14 @@ int  main  (int i_argc, const char* i_argv[])
         }
     }
 
-    if (argRepl) {
-        ARGV_SET(argFile);
-        if (!argFunc) ARGV_SET(argFunc);
-    } else {
-        if (i_argc < 1) {
-            print_usage();
-            return 1;
-        }
-        ARGV_SET(argFile);
-        if (!argFunc) ARGV_SET(argFunc); //argFunc = "_start"; //TODO: reverted for now
+    if ((argRepl and (i_argc > 1)) or   // repl supports 0 or 1 args
+        (not argRepl and (i_argc < 1))  // normal expects at least 1
+    ) {
+        print_usage();
+        return 1;
     }
 
-    //printf("=== argFile: %s, argFunc: %s, args: %d\n", argFile, argFunc, i_argc);
+    ARGV_SET(argFile);
 
     result = repl_init(&env);
     if (result) FATAL("repl_init: %s", result);
@@ -177,7 +170,7 @@ int  main  (int i_argc, const char* i_argv[])
         result = m3_LinkLibC (env->modules);
         if (result) FATAL("m3_LinkLibC: %s", result);
 
-        if (argFunc) {
+        if (argFunc and not argRepl) {
             result = repl_call(env, argFunc, i_argc, i_argv);
             if (result) FATAL("repl_call: %s", result);
         }