Chapter 31: Software Drawing, Time, and Graphical Games

Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com>
Co-authored-by: Symious <14933944+symious@users.noreply.github.com>
Co-authored-by: Jun Kawasaki <jun784@gmail.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/main/smp/sys/text.smp b/src/main/smp/sys/text.smp
index a414ff45..2c4b44ff 100644
--- a/src/main/smp/sys/text.smp
+++ b/src/main/smp/sys/text.smp
@@ -5,10 +5,7 @@
 val begin = { -> new aryu8(); };
 
 val end = { aryu8 b ->
-    val bytes = new u8[b.len];
-    ary.copy(bytes,0,b.buf,0,b.len);
-    u8[~] result = bytes;
-    result;
+    new u8[~b.len]{ i64 i -> b.buf[i]; };
 };
 
 val _pad = { !aryu8 b, i64 n, u8 c ->
@@ -96,3 +93,8 @@ val f64  = { f64  x -> end(floating(begin(),x, 0 ,0,-1)); };
 val char = { i64  x -> end(integer (begin(),x,'c',0,-1)); };
 val bool = { bool x -> end(integer (begin(),x,'b',0,-1)); };
 val hex  = { i64  x -> end(integer (begin(),x,'x',0,-1)); };
+
+// Time selectors occupy spec bits 16..23; padding shares string formatting.
+val time = { !aryu8 b, i64 value, i64 spec, i64 width, i64 precision ->
+    string(b,sys.time.format(value,(spec>>>16)&255),spec,width,-1);
+};