From d061cbff87aa313e6204781b0569caa2d54c3d11 Mon Sep 17 00:00:00 2001
From: Kartik Agaram <vc@akkartik.com>
Date: Fri, 25 Sep 2020 09:47:55 -0700
Subject: 6855

Get rid of cutesy justify thresholds. They didn't actually save me any
trouble, and they won't generalize to other literals besides ints.
---
 407print-int32-decimal-right-justified.mu | 81 +++++++++++++++----------------
 1 file changed, 40 insertions(+), 41 deletions(-)

(limited to '407print-int32-decimal-right-justified.mu')

diff --git a/407print-int32-decimal-right-justified.mu b/407print-int32-decimal-right-justified.mu
index 7d83217a..47725b96 100644
--- a/407print-int32-decimal-right-justified.mu
+++ b/407print-int32-decimal-right-justified.mu
@@ -1,66 +1,65 @@
-# print 'n' with enough leading spaces to be right-justified with 'threshold'
-# 'threshold' should be the minimum positive number for some width
-fn print-int32-decimal-right-justified screen: (addr screen), n: int, _threshold: int {
+# print 'n' with enough leading spaces to be right-justified in 'width'
+fn print-int32-decimal-right-justified screen: (addr screen), n: int, _width: int {
   # tweak things for negative numbers
-  var n2/ecx: int <- right-justify-threshold-decimal n
-  var threshold/eax: int <- copy _threshold
+  var n-width/ecx: int <- int-width-decimal n
+  var width/eax: int <- copy _width
   {
-    compare n2, threshold
+    compare n-width, width
     break-if->=
     print-grapheme screen, 0x20  # space
-    threshold <- try-divide threshold, 0xa
+    width <- decrement
     loop
   }
   print-int32-decimal screen, n
 }
 
-# return the minimum positive number with the same width in decimal as 'n'
-fn right-justify-threshold-decimal n: int -> result/ecx: int {
-  var ten/edx: int <- copy 0xa  # constant
-  # replace '-' at the start with '0' at the end
+fn int-width-decimal n: int -> result/ecx: int {
+  result <- copy 1
   var curr/eax: int <- copy n
+  # account for '-'
   compare curr, 0
   {
     break-if->=
     curr <- negate
-    curr <- multiply ten
+    result <- increment
   }
   # now we're dealing with a positive number
-  result <- copy 1
   {
     compare curr, 0xa
     break-if-<
     curr <- try-divide curr, 0xa
-    result <- multiply ten
+    result <- increment
     loop
   }
 }
 
-fn test-right-justify-threshold {
-  var x/ecx: int <- right-justify-threshold-decimal 0
-  check-ints-equal x, 1, "F - test-right-justify-threshold-decimal: 0"
-  x <- right-justify-threshold-decimal 1
-  check-ints-equal x, 1, "F - test-right-justify-threshold-decimal: 1"
-  x <- right-justify-threshold-decimal 4
-  check-ints-equal x, 1, "F - test-right-justify-threshold-decimal: 4"
-  x <- right-justify-threshold-decimal 9
-  check-ints-equal x, 1, "F - test-right-justify-threshold-decimal: 9"
-  x <- right-justify-threshold-decimal 0xa
-  check-ints-equal x, 0xa, "F - test-right-justify-threshold-decimal: 10"
-  x <- right-justify-threshold-decimal 0xb
-  check-ints-equal x, 0xa, "F - test-right-justify-threshold-decimal: 11"
-  x <- right-justify-threshold-decimal 0x4f  # 79
-  check-ints-equal x, 0xa, "F - test-right-justify-threshold-decimal: 79"
-  x <- right-justify-threshold-decimal 0x64  # 100
-  check-ints-equal x, 0x64, "F - test-right-justify-threshold-decimal: 100"
-  x <- right-justify-threshold-decimal 0x65  # 101
-  check-ints-equal x, 0x64, "F - test-right-justify-threshold-decimal: 101"
-  x <- right-justify-threshold-decimal 0x3e7  # 999
-  check-ints-equal x, 0x64, "F - test-right-justify-threshold-decimal: 999"
-  x <- right-justify-threshold-decimal 0x3e8  # 1000
-  check-ints-equal x, 0x3e8, "F - test-right-justify-threshold-decimal: 1000"
-  x <- right-justify-threshold-decimal -1
-  check-ints-equal x, 0xa, "F - test-right-justify-threshold-decimal: -1"
-  x <- right-justify-threshold-decimal -0xb  # -11
-  check-ints-equal x, 0x64, "F - test-right-justify-threshold-decimal: -11"
+fn test-int-width-decimal {
+  var x/ecx: int <- int-width-decimal 0
+  check-ints-equal x, 1, "F - test-int-width-decimal: 0"
+  x <- int-width-decimal 1
+  check-ints-equal x, 1, "F - test-int-width-decimal: 1"
+  x <- int-width-decimal 4
+  check-ints-equal x, 1, "F - test-int-width-decimal: 4"
+  x <- int-width-decimal 9
+  check-ints-equal x, 1, "F - test-int-width-decimal: 9"
+  x <- int-width-decimal 0xa
+  check-ints-equal x, 2, "F - test-int-width-decimal: 10"
+  x <- int-width-decimal 0xb
+  check-ints-equal x, 2, "F - test-int-width-decimal: 11"
+  x <- int-width-decimal 0x4f  # 79
+  check-ints-equal x, 2, "F - test-int-width-decimal: 79"
+  x <- int-width-decimal 0x63  # 99
+  check-ints-equal x, 2, "F - test-int-width-decimal: 100"
+  x <- int-width-decimal 0x64  # 100
+  check-ints-equal x, 3, "F - test-int-width-decimal: 100"
+  x <- int-width-decimal 0x65  # 101
+  check-ints-equal x, 3, "F - test-int-width-decimal: 101"
+  x <- int-width-decimal 0x3e7  # 999
+  check-ints-equal x, 3, "F - test-int-width-decimal: 999"
+  x <- int-width-decimal 0x3e8  # 1000
+  check-ints-equal x, 4, "F - test-int-width-decimal: 1000"
+  x <- int-width-decimal -1
+  check-ints-equal x, 2, "F - test-int-width-decimal: -1"
+  x <- int-width-decimal -0xb  # -11
+  check-ints-equal x, 3, "F - test-int-width-decimal: -11"
 }
-- 
cgit 1.4.1-2-gfad0