From b4dcb4bf524efdd280f55721a05a4572be32e7c7 Mon Sep 17 00:00:00 2001
From: Abigail <abigail@abigail.be>
Date: Sun, 14 Mar 2021 19:10:50 +0100
Subject: Bash solution for week 103, part 2

---
 challenge-103/abigail/README.md    |  1 +
 challenge-103/abigail/bash/ch-2.sh | 62 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 challenge-103/abigail/bash/ch-2.sh

diff --git a/challenge-103/abigail/README.md b/challenge-103/abigail/README.md
index 9d90314025..69c67fa04e 100644
--- a/challenge-103/abigail/README.md
+++ b/challenge-103/abigail/README.md
@@ -124,6 +124,7 @@ Output:
 
 ### Solutions
 * [GNU AWK](awk/ch-2.awk)
+* [Bash](bash/ch-2.sh)
 * [C](c/ch-2.c)
 * [Lua](lua/ch-2.lua)
 * [Perl](perl/ch-2.pl)
diff --git a/challenge-103/abigail/bash/ch-2.sh b/challenge-103/abigail/bash/ch-2.sh
new file mode 100644
index 0000000000..e35d48c034
--- /dev/null
+++ b/challenge-103/abigail/bash/ch-2.sh
@@ -0,0 +1,62 @@
+#!/bin/sh
+
+#
+# See ../README.md
+#
+
+#
+# Run as: bash ch-2.sh < input-file
+#
+
+set -f
+
+#
+# Parse input
+#
+while read start_time current_time file_name
+do  time_diff=$(((current_time - start_time) * 1000))
+
+    #
+    # Read the media file, storing run times and titles
+    # into two arrays.
+    #
+    declare -a run_times
+    declare -a titles
+    total_time=0
+
+    nr_of_tracks=0
+    while read track
+    do    
+        run_time=${track/,*/}
+        title=${track/[^,]*,/}
+        run_times[$nr_of_tracks]=$run_time
+        titles[$nr_of_tracks]=$title
+        ((nr_of_tracks ++))
+        total_time=$((total_time + run_time))
+    done < $file_name
+
+    #
+    # Don't care about full loops played.
+    #
+    time_diff=$((time_diff % total_time))
+
+    #
+    # Find the right track.
+    #
+    for ((i = 0; i < nr_of_tracks; i ++))
+    do
+        if ((time_diff - run_times[i] < 0))
+        then echo ${titles[$i]}
+             time_diff=$((time_diff / 1000))
+             hours=$((    time_diff / 3600))
+             minutes=$(( (time_diff % 3600) / 60))
+             seconds=$((  time_diff         % 60))
+             if ((hours > 0))
+             then printf "%02d:%02d:%02d\n" $hours $minutes $seconds
+             else printf      "%02d:%02d\n"        $minutes $seconds
+             fi
+             break
+        else time_diff=$((time_diff - run_times[i]))
+        fi
+    done
+done
-- 
cgit