move shell common functions in a lib

[protos/libecoli.git] / libshell / libecoli.sh

diff --git a/libshell/libecoli.sh b/libshell/libecoli.sh
new file mode 100644 (file)
index 0000000..fdb642d
--- /dev/null
+++ b/libshell/libecoli.sh
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2018, Olivier MATZ <zer0@droids-corp.org>
+
+# Source this file from a shell script to add libecoli helpers.
+
+# use a safer version of echo (no option)
+ec_echo()
+{
+       printf "%s\n" "$*"
+}
+
+ec_debug()
+{
+       ec_echo "$@" >&2
+}
+
+# $1: node sequence number (ex: ec_node4)
+ec_parse_get_first_child()
+{
+       local first_child=${1}_first_child
+       ec_echo $(eval 'ec_echo ${'$first_child'}')
+}
+
+# $1: node sequence number (ex: ec_node4)
+ec_parse_get_next()
+{
+       local next=${1}_next
+       ec_echo $(eval 'ec_echo ${'$next'}')
+}
+
+# $1: node sequence number (ex: ec_node4)
+ec_parse_iter_next()
+{
+       local seq=${1#ec_node}
+       seq=$((seq+1))
+       local next=ec_node${seq}
+       if [ "$(ec_parse_get_id $next)" != "" ]; then
+               ec_echo $next
+       fi
+}
+
+# $1: node sequence number (ex: ec_node4)
+ec_parse_get_id()
+{
+       local id=${1}_id
+       ec_echo $(eval 'ec_echo ${'$id'}')
+}
+
+# $1: node sequence number (ex: ec_node4)
+ec_parse_get_strvec_len()
+{
+       local strvec_len=${1}_strvec_len
+       ec_echo $(eval 'ec_echo ${'$strvec_len'}')
+}
+
+# $1: node sequence number (ex: ec_node4)
+# $2: index in strvec
+ec_parse_get_str()
+{
+       if [ $# -ne 2 ]; then
+               return
+       fi
+       local str=${1}_str${2}
+       ec_echo $(eval 'ec_echo ${'$str'}')
+}
+
+# $1: node sequence number (ex: ec_node4)
+# $2: node id (string)
+ec_parse_find_first()
+{
+       if [ $# -ne 2 ]; then
+               return
+       fi
+       local node_seq=$1
+       while [ "$node_seq" != "" ]; do
+               local id=$(ec_parse_get_id $node_seq)
+               if [ "$id" = "$2" ]; then
+                       ec_echo $node_seq
+                       return 0
+               fi
+               node_seq=$(ec_parse_iter_next $node_seq)
+       done
+}