Better error messagesch30

Better error messages.
Buffs to the std lib; getch() to fetch a single character; streaming I/O handles retries, and large sizes, with better error reporting.
Formatted strings.
Default int moved to i32.
TicTacToe, the game.

1 files changed, 22 insertions, 0 deletions

diff --git a/chapter30/src/main/smp/sys/rt/simple_args.smp b/chapter30/src/main/smp/sys/rt/simple_args.smp
new file mode 100644
index 00000000..3f630e54
--- /dev/null
+++ b/chapter30/src/main/smp/sys/rt/simple_args.smp
@@ -0,0 +1,22 @@
+// Native startup support, compiled independently and linked with the CRT.
+// Raw native addresses stay i64; only the arrays allocated here are Simple objects.
+{ i64 i64 -> i64 } simple_argv = "C";
+{ i64 -> i64 } strlen = "C";
+{ i64 i64 i64 -> i64 } memcpy = "C";
+
+val simple_args = { i64 argc, i64 argv ->
+    if( argc < 0 || argc > 4294967295 ) return null;
+    // Zero-filled reference arrays require nullable elements. Every slot is
+    // filled before returning; the native entry bridge publishes u8[~][].
+    val args = new u8[~]?[argc];
+    for( i64 i=0; i<argc; i++ ) {
+        i64 src = simple_argv(argv,i);
+        i64 len = strlen(src);
+        if( len < 0 || len > 4294967295 ) return null;
+        val bytes = new u8[len];
+        i64 dst = bytes;
+        memcpy(dst,src,len);
+        args[i] = bytes;
+    }
+    return args;
+};