wasi: Implement more of the wasi API (#1430)

I've been used the tests from wasi-sdk to get started:
https://github.com/WebAssembly/wasi-sdk/tree/master/tests

All these tests now pass.  Still this isn't saying much, there are still
some big missing pieces.  Started using the new serdes
(serialize/deserialze) API in uvwasi.  I think we are almost at the
point were we can look at auto-generating some of this stuff from witx
to avoid having the hand code all this marshelling stuff.

Add support for ArgumentCount::ZeroOrMore to OptionParser and also the
ability to force the end of option processing using `--`.  This allows
is to pass options through the underlying wasi program when running
wasm-interp.

1 files changed, 29 insertions, 0 deletions

diff --git a/src/test-option-parser.cc b/src/test-option-parser.cc
index 3d190e71..9295c581 100644
--- a/src/test-option-parser.cc
+++ b/src/test-option-parser.cc
@@ -150,3 +150,32 @@ TEST(OptionParser, OneOrMoreArguments) {
   parser.Parse(3, const_cast<char**>(args));
   EXPECT_EQ("hellogoodbye", argument);
 }
+
+TEST(OptionParser, ZeroOrMoreArguments) {
+  std::string argument;
+  OptionParser parser("prog", "desc");
+  parser.AddArgument("arg", OptionParser::ArgumentCount::ZeroOrMore,
+                     [&](const char* arg) { argument += arg; });
+
+  const char* args_none[] = {"prog name"};
+  parser.Parse(1, const_cast<char**>(args_none));
+  EXPECT_EQ("", argument);
+
+  const char* args_many[] = {"prog name", "hello", "goodbye"};
+  parser.Parse(3, const_cast<char**>(args_many));
+  EXPECT_EQ("hellogoodbye", argument);
+}
+
+TEST(OptionParser, StopProccessing) {
+  std::string argument;
+  bool has_x = false;
+  OptionParser parser("prog", "desc");
+  parser.AddArgument("arg", OptionParser::ArgumentCount::ZeroOrMore,
+                     [&](const char* arg) { argument += arg; });
+  parser.AddOption('x', "x", "help", [&]() { has_x = true; });
+
+  const char* args_many[] = {"prog name", "-x", "--", "foo", "-x", "-y", "bar"};
+  parser.Parse(7, const_cast<char**>(args_many));
+  EXPECT_TRUE(has_x);
+  EXPECT_EQ("foo-x-ybar", argument);
+}