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|
#!/bin/bash
# The MIT License
#
# Copyright (c) 2011 Dominic Tarr
#
# Permission is hereby granted, free of charge,
# to any person obtaining a copy of this software and
# associated documentation files (the "Software"), to
# deal in the Software without restriction, including
# without limitation the rights to use, copy, modify,
# merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom
# the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice
# shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
#
# https://github.com/dominictarr/JSON.sh
#
throw () {
echo "$*" >&2
exit 1
}
tokenize () {
local ESCAPE='(\\[^u[:cntrl:]]|\\u[0-9a-fA-F]{4})'
local CHAR='[^[:cntrl:]"\\]'
local STRING="\"$CHAR*($ESCAPE$CHAR*)*\""
local NUMBER='-?(0|[1-9][0-9]*)([.][0-9]*)?([eE][+-]?[0-9]*)?'
local KEYWORD='null|false|true'
local SPACE='[[:space:]]+'
egrep -ao "$STRING|$NUMBER|$KEYWORD|$SPACE|." --color=never |
egrep -v "^$SPACE$" # eat whitespace
}
parse_array () {
local index=0
local ary=''
read -r token
case "$token" in
']') ;;
*)
while :
do
parse_value "$1" "$index"
let index=$index+1
ary="$ary""$value"
read -r token
case "$token" in
']') break ;;
',') ary="$ary," ;;
*) throw "EXPECTED , or ] GOT ${token:-EOF}" ;;
esac
read -r token
done
;;
esac
value=`printf '[%s]' "$ary"`
}
parse_object () {
local key
local obj=''
read -r token
case "$token" in
'}') ;;
*)
while :
do
case "$token" in
'"'*'"') key=$token ;;
*) throw "EXPECTED string GOT ${token:-EOF}" ;;
esac
read -r token
case "$token" in
':') ;;
*) throw "EXPECTED : GOT ${token:-EOF}" ;;
esac
read -r token
parse_value "$1" "$key"
obj="$obj$key:$value"
read -r token
case "$token" in
'}') break ;;
',') obj="$obj," ;;
*) throw "EXPECTED , or } GOT ${token:-EOF}" ;;
esac
read -r token
done
;;
esac
value=`printf '{%s}' "$obj"`
}
parse_value () {
local jpath="${1:+$1,}$2"
case "$token" in
'{') parse_object "$jpath" ;;
'[') parse_array "$jpath" ;;
# At this point, the only valid single-character tokens are digits.
''|[^0-9]) throw "EXPECTED value GOT ${token:-EOF}" ;;
*) value=$token ;;
esac
printf "[%s]\t%s\n" "$jpath" "$value"
}
parse () {
read -r token
parse_value
read -r token
case "$token" in
'') ;;
*) throw "EXPECTED EOF GOT $token" ;;
esac
}
if [ $0 = $BASH_SOURCE ];
then
tokenize | parse
fi
|
