uxndebug

commit 2afe2bd5ee3d3d7f42ad93d6fe51eb938e8c0cf4
parent a67888013c23b5ba833ed0eb9d03a3fc957afc54
Author: aabacchus <ben@bvnf.space>
Date:   Mon,  6 Jun 2022 00:21:01 +0100

highlight the guilty token in uxnsolve

Diffstat:
M
uxnsolve
 | 
19
+++++++++++++++++--

1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/uxnsolve b/uxnsolve
@@ -44,6 +44,21 @@ is_integer "$token" || {
     exit 1
 }
 
+print_highlighted() {
+    index="$1"
+    shift
+    j=1
+    for token; do
+        if [ "$j" -eq "$index" ]; then
+            printf " \033[1;31m%s\033[m" "$token"
+        else
+            printf " %s" "$token"
+        fi
+        j="$((j + 1))"
+    done
+    printf "\n"
+}
+
 i=0
 lineno=0
 while read -r line; do
@@ -53,8 +68,8 @@ while read -r line; do
     set -- $line
     i="$((i + $#))"
     [ "$i" -ge "$token" ] && {
-        printf "line %d: %s\n" "$lineno" "$line"
-        # TODO: highlight the individual token?
+        printf "line %d: " "$lineno"
+        print_highlighted "$(($# - i + token))" "$@"
         break
     }
 done < "$source_file"