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