From b29cb298a8d08a9d47d37b3d1ee7a62cc31a43d3 Mon Sep 17 00:00:00 2001
From: Abigail <abigail@abigail.be>
Date: Mon, 18 Oct 2021 21:38:38 +0200
Subject: Bash solutions for week 135

---
 challenge-135/abigail/README.md    |  2 ++
 challenge-135/abigail/bash/ch-1.sh | 27 +++++++++++++++++++++++++++
 challenge-135/abigail/bash/ch-2.sh | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 challenge-135/abigail/bash/ch-1.sh
 create mode 100644 challenge-135/abigail/bash/ch-2.sh

diff --git a/challenge-135/abigail/README.md b/challenge-135/abigail/README.md
index e0e26b70dd..5d1820d670 100644
--- a/challenge-135/abigail/README.md
+++ b/challenge-135/abigail/README.md
@@ -3,11 +3,13 @@
 ## Part 1
 
 * [AWK](awk/ch-1.awk)
+* [Bash](bash/ch-1.sh)
 * [C](c/ch-1.c)
 * [Perl](perl/ch-1.pl)
 
 ## Part 2
 
 * [AWK](awk/ch-2.awk)
+* [Bash](bash/ch-1.sh)
 * [C](c/ch-2.c)
 * [Perl](perl/ch-2.pl)
diff --git a/challenge-135/abigail/bash/ch-1.sh b/challenge-135/abigail/bash/ch-1.sh
new file mode 100644
index 0000000000..d85a744a0c
--- /dev/null
+++ b/challenge-135/abigail/bash/ch-1.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+#
+# See ../README.md
+#
+
+#
+# Run as: bash ch-1.sh < input-file
+#
+
+set -f
+
+while read line
+do   line=${line/#[-+]/}   # Get rid of sign
+     if [[ $line =~ [^0-9] ]]
+     then
+         echo "not an integer"
+     elif ((${#line} % 2 == 0))
+     then
+         echo "even number of digits"
+     elif ((${#line} < 3))
+     then
+         echo "too short"
+     else
+         echo ${line:$(((${#line} - 3) / 2)):3}
+     fi
+done
diff --git a/challenge-135/abigail/bash/ch-2.sh b/challenge-135/abigail/bash/ch-2.sh
new file mode 100644
index 0000000000..0d4c43e705
--- /dev/null
+++ b/challenge-135/abigail/bash/ch-2.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+#
+# See ../README.md
+#
+
+#
+# Run as: bash ch-2.sh < input-file
+#
+
+set -f
+
+w=(1 3 1 7 3 9 1)
+
+while read line
+do    if ((${#line} != 7))
+      then echo 0
+      elif [[ $line =~ [^0-9BCDFGHJKLMNPQRSTVWXYZ] ]]
+      then echo 0
+      else
+          ((check = 0))
+          for ((i = 0; i < 7; i ++))
+          do  char=${line:$i:1}
+              printf -v ord %d "'$char"
+              if [[ $char =~ [0-9] ]]
+              then ((value = ord - 48))
+              else ((value = ord - 65 + 10))
+              fi
+              ((check += ${w[i]} * value))
+          done
+          if ((check % 10 == 0))
+          then echo 1
+          else echo 0
+          fi
+      fi
+done
-- 
cgit