# functions for parsing and generating json
-jshn_append() {
- local var="$1"
+_json_get_var() {
+ # dest=$1
+ # var=$2
+ eval "$1=\"\$${JSON_PREFIX}$2\""
+}
+
+_json_set_var() {
+ # var=$1
+ local ___val="$2"
+ eval "${JSON_PREFIX}$1=\"\$___val\""
+}
+
+__jshn_raw_append() {
+ # var=$1
local value="$2"
local sep="${3:- }"
- eval "export -- \"$var=\${$var:+\${$var}\${value:+\$sep}}\$value\""
+ eval "export -- \"$1=\${$1:+\${$1}\${value:+\$sep}}\$value\""
}
-json_init() {
- [ -n "$JSON_UNSET" ] && eval "unset $JSON_UNSET"
- export -- JSON_SEQ=0 JSON_STACK= JSON_CUR="JSON_VAR" JSON_UNSET=
+_jshn_append() {
+ # var=$1
+ local _a_value="$2"
+ eval "${JSON_PREFIX}$1=\"\${${JSON_PREFIX}$1} \$_a_value\""
+}
+
+_get_var() {
+ # var=$1
+ # value=$2
+ eval "$1=\"\$$2\""
+}
+
+_set_var() {
+ # var=$1
+ local __val="$2"
+ eval "$1=\"\$__val\""
+}
+
+_json_inc() {
+ # var=$1
+ # dest=$2
+
+ let "${JSON_PREFIX}$1 += 1" "$2 = ${JSON_PREFIX}$1"
+}
+
+_json_add_generic() {
+ # type=$1
+ # name=$2
+ # value=$3
+ # cur=$4
+
+ local var
+ if [ "${4%%[0-9]*}" = "JSON_ARRAY" ]; then
+ _json_inc "SEQ_$4" var
+ else
+ local name="${2//[^a-zA-Z0-9_]/_}"
+ [[ "$name" == "$2" ]] || export -- "${JSON_PREFIX}NAME_${4}_${name}=$2"
+ var="$name"
+ fi
+
+ local cur_var=
+ export -- \
+ "${JSON_PREFIX}${4}_$var=$3" \
+ "${JSON_PREFIX}TYPE_${4}_$var=$1"
+ _jshn_append "JSON_UNSET" "${4}_$var"
+ _jshn_append "KEYS_$4" "$var"
+}
+
+_json_add_table() {
+ # name=$1
+ # type=$2
+ # itype=$3
+ local cur seq
+
+ _json_get_var cur JSON_CUR
+ _json_inc JSON_SEQ seq
+
+ local table="JSON_$3$seq"
+ _json_set_var "UP_$table" "$cur"
+ export -- "${JSON_PREFIX}KEYS_$table="
+ unset "${JSON_PREFIX}SEQ_$table"
+ _json_set_var JSON_CUR "$table"
+ _jshn_append "JSON_UNSET" "$table"
+
+ _json_add_generic "$2" "$1" "$table" "$cur"
+}
+
+_json_close_table() {
+ local _s_cur
+
+ _json_get_var _s_cur JSON_CUR
+ _json_get_var "${JSON_PREFIX}JSON_CUR" "UP_$_s_cur"
+ unset "${JSON_PREFIX}UP_$_s_cur"
}
-json_add_generic() {
- local type="$1"
- local var="$2"
- local val="$3"
- local cur="${4:-$JSON_CUR}"
+json_set_namespace() {
+ local _new="$1"
+ local _old="$2"
- export -- "${cur}_$var=$val"
- export -- "TYPE_${cur}_$var=$type"
- jshn_append JSON_UNSET "${cur}_$var TYPE_${cur}_$var"
- jshn_append "KEYS_${cur}" "$var"
+ [ -n "$_old" ] && _set_var "$_old" "$JSON_PREFIX"
+ JSON_PREFIX="$_new"
}
-json_add_table() {
- JSON_SEQ=$(($JSON_SEQ + 1))
- jshn_append JSON_STACK "$JSON_CUR"
- local table="JSON_TABLE$JSON_SEQ"
- export -- "UP_$table=$JSON_CUR"
- export -- "KEYS_$table="
- jshn_append JSON_UNSET "KEYS_$table UP_$table"
- JSON_CUR="$table"
+json_cleanup() {
+ local unset tmp
+
+ _json_get_var unset JSON_UNSET
+ for tmp in $unset JSON_VAR; do
+ unset \
+ ${JSON_PREFIX}UP_$tmp \
+ ${JSON_PREFIX}KEYS_$tmp \
+ ${JSON_PREFIX}SEQ_$tmp \
+ ${JSON_PREFIX}TYPE_$tmp \
+ ${JSON_PREFIX}NAME_$tmp \
+ ${JSON_PREFIX}$tmp
+ done
+
+ unset \
+ ${JSON_PREFIX}JSON_SEQ \
+ ${JSON_PREFIX}JSON_CUR \
+ ${JSON_PREFIX}JSON_UNSET
+}
+
+json_init() {
+ json_cleanup
+ export -n ${JSON_PREFIX}JSON_SEQ=0
+ export -- \
+ ${JSON_PREFIX}JSON_CUR="JSON_VAR" \
+ ${JSON_PREFIX}KEYS_JSON_VAR=
}
json_add_object() {
- local cur="$JSON_CUR"
- json_add_table
- json_add_generic object "$1" "$JSON_CUR" "$cur"
+ _json_add_table "$1" object TABLE
}
json_close_object() {
- local oldstack="$JSON_STACK"
- JSON_CUR="${JSON_STACK##* }"
- JSON_STACK="${JSON_STACK% *}"
- [[ "$oldstack" == "$JSON_STACK" ]] && JSON_STACK=
+ _json_close_table
}
json_add_array() {
- local cur="$JSON_CUR"
- json_add_table
- json_add_generic array "$1" "$JSON_CUR" "$cur"
+ _json_add_table "$1" array ARRAY
}
json_close_array() {
- json_close_object
+ _json_close_table
}
json_add_string() {
- json_add_generic string "$1" "$2"
+ local cur
+ _json_get_var cur JSON_CUR
+ _json_add_generic string "$1" "$2" "$cur"
}
json_add_int() {
- json_add_generic int "$1" "$2"
+ local cur
+ _json_get_var cur JSON_CUR
+ _json_add_generic int "$1" "$2" "$cur"
}
json_add_boolean() {
- json_add_generic boolean "$1" "$2"
+ local cur
+ _json_get_var cur JSON_CUR
+ _json_add_generic boolean "$1" "$2" "$cur"
+}
+
+json_add_double() {
+ local cur
+ _json_get_var cur JSON_CUR
+ _json_add_generic double "$1" "$2" "$cur"
}
# functions read access to json variables
json_load() {
- eval `jshn -r "$1"`
+ eval "`jshn -r "$1"`"
}
json_dump() {
- jshn "$@" -w
+ jshn "$@" ${JSON_PREFIX:+-p "$JSON_PREFIX"} -w
}
json_get_type() {
- local dest="$1"
- local var="$2"
- eval "export -- \"$dest=\${TYPE_${JSON_CUR}_$var}\""
+ local __dest="$1"
+ local __cur
+
+ _json_get_var __cur JSON_CUR
+ local __var="${JSON_PREFIX}TYPE_${__cur}_${2//[^a-zA-Z0-9_]/_}"
+ eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
+}
+
+json_get_keys() {
+ local __dest="$1"
+ local _tbl_cur
+
+ if [ -n "$2" ]; then
+ json_get_var _tbl_cur "$2"
+ else
+ _json_get_var _tbl_cur JSON_CUR
+ fi
+ local __var="${JSON_PREFIX}KEYS_${_tbl_cur}"
+ eval "export -- \"$__dest=\${$__var}\"; [ -n \"\${$__var+x}\" ]"
+}
+
+json_get_values() {
+ local _v_dest="$1"
+ local _v_keys _v_val _select=
+ local _json_no_warning=1
+
+ unset "$_v_dest"
+ [ -n "$2" ] && {
+ json_select "$2" || return 1
+ _select=1
+ }
+
+ json_get_keys _v_keys
+ set -- $_v_keys
+ while [ "$#" -gt 0 ]; do
+ json_get_var _v_val "$1"
+ __jshn_raw_append "$_v_dest" "$_v_val"
+ shift
+ done
+ [ -n "$_select" ] && json_select ..
+
+ return 0
}
json_get_var() {
- local dest="$1"
- local var="$2"
- eval "export -- \"$dest=\${${JSON_CUR}_$var}\""
+ local __dest="$1"
+ local __cur
+
+ _json_get_var __cur JSON_CUR
+ local __var="${JSON_PREFIX}${__cur}_${2//[^a-zA-Z0-9_]/_}"
+ eval "export -- \"$__dest=\${$__var:-$3}\"; [ -n \"\${$__var+x}\${3+x}\" ]"
+}
+
+json_get_vars() {
+ while [ "$#" -gt 0 ]; do
+ local _var="$1"; shift
+ if [ "$_var" != "${_var#*:}" ]; then
+ json_get_var "${_var%%:*}" "${_var%%:*}" "${_var#*:}"
+ else
+ json_get_var "$_var" "$_var"
+ fi
+ done
}
json_select() {
local target="$1"
local type
+ local cur
[ -z "$1" ] && {
- JSON_CUR="JSON_VAR"
- return
+ _json_set_var JSON_CUR "JSON_VAR"
+ return 0
}
[[ "$1" == ".." ]] && {
- eval "JSON_CUR=\"\${UP_$JSON_CUR}\""
- return;
+ _json_get_var cur JSON_CUR
+ _json_get_var cur "UP_$cur"
+ unset "${JSON_PREFIX}UP_$cur"
+ _json_set_var JSON_CUR "$cur"
+ return 0
}
json_get_type type "$target"
case "$type" in
object|array)
- json_get_var JSON_CUR "$target"
+ json_get_var cur "$target"
+ _json_get_var "${JSON_PREFIX}UP_$cur" JSON_CUR
+ _json_set_var JSON_CUR "$cur"
;;
*)
- echo "WARNING: Variable '$target' does not exist or is not an array/object"
+ [ -n "$_json_no_warning" ] || \
+ echo "WARNING: Variable '$target' does not exist or is not an array/object"
+ return 1
;;
esac
}
+
+json_is_a() {
+ local type
+
+ json_get_type type "$1"
+ [ "$type" = "$2" ]
+}
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