106 lines
3.8 KiB
Plaintext
106 lines
3.8 KiB
Plaintext
////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: Varargs.sg
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//
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// Note: Test __arglist parameters
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//
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using System;
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using System.Text;
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namespace Microsoft.Singularity.Applications
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{
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public class Varargs
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{
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public static int Main(String[]! args)
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{
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string name = "VarArgs.x86";
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int len = 1;
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int code = Printf("Invoked command with name '%s' and %d arguments", __arglist(name, len));
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Console.WriteLine("Varargs exiting.");
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return code;
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}
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public static int Printf(string! fmt, __arglist) {
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return Decode(fmt, __arglist);
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}
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public static int Decode(string! fmt, RuntimeArgumentHandle art) {
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StringBuilder sb = new StringBuilder();
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ArgIterator ai = new ArgIterator(art);
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int length = fmt.Length;
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for (int index = 0; index < length; index++) {
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char c = fmt[index];
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if (c == '%') {
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index++;
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if (index < length) {
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c = fmt[index];
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switch (c) {
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case '%':
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sb.Append('%');
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break;
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case 's':
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if (ai.GetRemainingCount() > 0) {
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TypedReference tr = ai.GetNextArg();
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Type t = __reftype(tr);
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if (t == typeof(string)) {
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string s = __refvalue(tr, string);
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sb.Append(s);
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}
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else {
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Console.WriteLine("Invalid argument for %s: {0}", t.ToString());
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return 1;
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}
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}
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else {
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Console.WriteLine("Insufficient number of arguments for %s");
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return 1;
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}
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break;
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case 'd':
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if (ai.GetRemainingCount() > 0) {
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TypedReference tr = ai.GetNextArg();
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Type t = __reftype(tr);
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if (t == typeof(int)) {
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int i = __refvalue(tr, int);
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sb.Append(i.ToString());
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}
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else {
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Console.WriteLine("Invalid argument for %i: {0}", t.ToString());
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return 1;
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}
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}
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else {
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Console.WriteLine("Insufficient number of arguments for %i");
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return 1;
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}
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break;
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default:
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Console.WriteLine("Unknown format directive %{0}", c);
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return 1;
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}
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}
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else {
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Console.WriteLine("Error in format: end of string after %");
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return -1;
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}
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}
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else {
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sb.Append(c);
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}
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}
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Console.WriteLine(sb.ToString());
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return 0;
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}
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}
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}
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