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json6.js
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json6.js
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// json6.js
// JSON for Humans. See README.md for details.
//
// This file is based off of https://github.com/d3x0r/sack ./src/netlib/html5.websocket/json6_parser.c
//
"use strict";
const _DEBUG_PARSING = false;
const _DEBUG_PARSING_STACK = false;
const SUPPORT_LEAD_ZERO_OCTAL = true;
const VALUE_UNDEFINED = -1
const VALUE_UNSET = 0
const VALUE_NULL = 1
const VALUE_TRUE = 2
const VALUE_FALSE = 3
const VALUE_STRING = 4
const VALUE_NUMBER = 5
const VALUE_OBJECT = 6
const VALUE_ARRAY = 7
const VALUE_NEG_NAN = 8
const VALUE_NAN = 9
const VALUE_NEG_INFINITY = 10
const VALUE_INFINITY = 11
const VALUE_DATE = 12 // unused yet
const VALUE_EMPTY = 13 // [,] makes an array with 'empty item'
const WORD_POS_RESET = 0;
const WORD_POS_TRUE_1 = 1;
const WORD_POS_TRUE_2 = 2;
const WORD_POS_TRUE_3 = 3;
const WORD_POS_FALSE_1 = 5;
const WORD_POS_FALSE_2 = 6;
const WORD_POS_FALSE_3 = 7;
const WORD_POS_FALSE_4 = 8;
const WORD_POS_NULL_1 = 9;
const WORD_POS_NULL_2 = 10;
const WORD_POS_NULL_3 = 11;
const WORD_POS_UNDEFINED_1 = 12;
const WORD_POS_UNDEFINED_2 = 13;
const WORD_POS_UNDEFINED_3 = 14;
const WORD_POS_UNDEFINED_4 = 15;
const WORD_POS_UNDEFINED_5 = 16;
const WORD_POS_UNDEFINED_6 = 17;
const WORD_POS_UNDEFINED_7 = 18;
const WORD_POS_UNDEFINED_8 = 19;
const WORD_POS_NAN_1 = 20;
const WORD_POS_NAN_2 = 21;
const WORD_POS_INFINITY_1 = 22;
const WORD_POS_INFINITY_2 = 23;
const WORD_POS_INFINITY_3 = 24;
const WORD_POS_INFINITY_4 = 25;
const WORD_POS_INFINITY_5 = 26;
const WORD_POS_INFINITY_6 = 27;
const WORD_POS_INFINITY_7 = 28;
const WORD_POS_FIELD = 29;
const WORD_POS_AFTER_FIELD = 30;
const WORD_POS_END = 31;
const CONTEXT_UNKNOWN = 0
const CONTEXT_IN_ARRAY = 1
const CONTEXT_IN_OBJECT = 2
const CONTEXT_OBJECT_FIELD = 3
const CONTEXT_OBJECT_FIELD_VALUE = 4
const contexts = [];
function getContext() { var ctx = contexts.pop(); if( !ctx ) ctx = { context : CONTEXT_UNKNOWN, elements : null, element_array : null }; return ctx; }
function dropContext(ctx) { contexts.push( ctx ) }
const buffers = [];
function getBuffer() { var buf = buffers.pop(); if( !buf ) buf = { buf:null, n:0 }; else buf.n = 0; return buf; }
function dropBuffer(buf) { buffers.push( buf ); }
var JSON6 = (typeof exports === 'object' ? exports : {});
JSON6.escape = function(string) {
var n;
var m = 0;
var output = '';
if( !string ) return string;
for( n = 0; n < string.length; n++ ) {
if( ( string[n] == '"' ) || ( string[n] == '\\' ) || ( string[n] == '`' )|| ( string[n] == '\'' )) {
output += '\\';
}
output += string[n];
}
return output;
}
JSON6.begin = function( cb, reviver ) {
const val = { name : null, // name of this value (if it's contained in an object)
value_type: VALUE_UNSET, // value from above indiciating the type of this value
string : '', // the string value of this value (strings and number types only)
contains : null,
};
const pos = { line:1, col:1 };
let n = 0;
let str;
var word = WORD_POS_RESET,
status = true,
negative = false,
result = null,
elements = undefined,
element_array = [],
context_stack = {
first : null,
last : null,
saved : null,
push(node) {
var recover = this.saved;
if( recover ) { this.saved = recover.next; recover.node = node; recover.next = null; recover.prior = this.last; }
else { recover = { node : node, next : null, prior : this.last }; }
if( !this.last ) this.first = recover;
this.last = recover;
},
pop() {
var result = this.last;
if( !(this.last = result.prior ) ) this.first = null;
result.next = this.saved; this.saved = result;
return result.node;
}
},
parse_context = CONTEXT_UNKNOWN,
comment = 0,
fromHex = false,
decimal = false,
exponent = false,
exponent_sign = false,
exponent_number = false,
exponent_digit = false,
inQueue = {
first : null,
last : null,
saved : null,
push(node) {
var recover = this.saved;
if( recover ) { this.saved = recover.next; recover.node = node; recover.next = null; recover.prior = this.last; }
else { recover = { node : node, next : null, prior : this.last }; }
if( !this.last ) this.first = recover;
this.last = recover;
},
shift() {
var result = this.first;
if( !(this.first = result.next ) ) this.last = null;
result.next = this.saved; this.saved = result;
return result.node;
},
unshift() {
var recover = this.saved;
if( recover ) { this.saved = recover.next; recover.node = node; recover.next = this.first; recover.prior = null; }
else { recover = { node : node, next : this.first, prior : null }; }
if( !this.first ) this.last = recover;
this.first = recover;
}
},
gatheringStringFirstChar = null,
gatheringString = false,
gatheringNumber = false,
stringEscape = false,
cr_escaped = false,
unicodeWide = false,
stringUnicode = false,
stringHex = false,
hex_char = 0,
hex_char_len = 0,
stringOct = false,
completed = false
;
return {
value() {
var r = result;
result = undefined;
return r;
},
reset() {
word = WORD_POS_RESET;
status = true;
if( inQueue.last ) inQueue.last.next = inQueue.save;
inQueue.save = inQueue.first;
inQueue.first = inQueue.last = null;
if( context_stack.last ) context_stack.last.next = context_stack.save;
context_stack.save = inQueue.first;
context_stack.first = context_stack.last = null;//= [];
element_array = null;
elements = undefined;
parse_context = CONTEXT_UNKNOWN;
val.value_type = VALUE_UNSET;
val.name = null;
val.string = '';
pos.line = 1;
pos.col = 1;
negative = false;
comment = 0;
completed = false;
gatheringString = false;
stringEscape = false; // string stringEscape intro
cr_escaped = false; // carraige return escaped
//stringUnicode = false; // reading \u
//unicodeWide = false; // reading \u{} in string
//stringHex = false; // reading \x in string
//stringOct = false; // reading \[0-3]xx in string
},
write(msg) {
var retcode;
if (typeof msg !== "string") msg = String(msg);
for( retcode = this._write(msg,false); retcode > 0; retcode = this._write() ) {
if( result ) {
if( typeof reviver === 'function' ) (function walk(holder, key) {
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}({'': result}, ''));
cb( result );
result = undefined;
}
if( retcode < 2 )
break;
}
},
_write(msg,complete_at_end) {
var cInt;
var input;
var buf;
var output;
var retval = 0;
function throwError( leader, c ) {
throw new Error( `${leader} '${String.fromCodePoint( c )}' unexpected at ${n} (near '${buf.substr(n>4?(n-4):0,n>4?3:(n-1))}[${String.fromCodePoint( c )}]${buf.substr(n, 10)}') [${pos.line}:${pos.col}]`);
}
function RESET_VAL() {
val.value_type = VALUE_UNSET;
val.string = '';
}
function numberConvert( string ) {
if( string.length > 1 ) {
if( !fromHex && !decimal && !exponent ) {
if( string.charCodeAt(0) === 48/*'0'*/ )
return (negative?-1:1) * Number( "0o" + string );
}
}
return (negative?-1:1) * Number( string );
}
function arrayPush() {
switch( val.value_type ){
case VALUE_NUMBER:
element_array.push( SUPPORT_LEAD_ZERO_OCTAL?numberConvert(val.string):((negative?-1:1) * Number( val.string )) );//(negative?-1:1) * Number( val.string ) );
break;
case VALUE_STRING:
element_array.push( val.string );
break;
case VALUE_TRUE:
element_array.push( true );
break;
case VALUE_FALSE:
element_array.push( false );
break;
case VALUE_NEG_NAN:
element_array.push( -NaN );
break;
case VALUE_NAN:
element_array.push( NaN );
break;
case VALUE_NEG_INFINITY:
element_array.push( -Infinity );
break;
case VALUE_INFINITY:
element_array.push( Infinity );
break;
case VALUE_NULL:
element_array.push( null );
break;
case VALUE_UNDEFINED:
element_array.push( undefined );
break;
case VALUE_EMPTY:
element_array.push( undefined );
delete element_array[element_array.length-1];
break;
case VALUE_OBJECT:
element_array.push( val.contains );
break;
case VALUE_ARRAY:
element_array.push( val.contains );
break;
default:
console.log( "Unhandled array push." );
break;
}
}
function objectPush() {
switch( val.value_type ){
case VALUE_NUMBER:
elements[val.name] = SUPPORT_LEAD_ZERO_OCTAL?numberConvert(val.string):((negative?-1:1) * Number( val.string ));//(negative?-1:1) * Number( val.string );
break;
case VALUE_STRING:
elements[val.name] = ( val.string );
break;
case VALUE_TRUE:
elements[val.name] = ( true );
break;
case VALUE_FALSE:
elements[val.name] = ( false );
break;
case VALUE_NEG_NAN:
elements[val.name] = ( -NaN );
break;
case VALUE_NAN:
elements[val.name] = ( NaN );
break;
case VALUE_NEG_INFINITY:
elements[val.name] = ( -Infinity );
break;
case VALUE_INFINITY:
elements[val.name] = ( Infinity );
break;
case VALUE_NULL:
elements[val.name] = ( null );
break;
case VALUE_UNDEFINED:
elements[val.name] = ( undefined );
break;
case VALUE_OBJECT:
elements[val.name] = val.contains;
break;
case VALUE_ARRAY:
elements[val.name] = val.contains;
break;
}
}
function gatherString( start_c ) {
let retval = 0;
while( retval == 0 && ( n < buf.length ) )
{
str = buf.charAt(n);
let cInt = buf.codePointAt(n++);
if( cInt >= 0x10000 ) { str += buf.charAt(n); n++; }
//console.log( "gathering....", stringEscape, str, cInt, unicodeWide, stringHex, stringUnicode, hex_char_len );
pos.col++;
if( cInt == start_c )//( cInt == 34/*'"'*/ ) || ( cInt == 39/*'\''*/ ) || ( cInt == 96/*'`'*/ ) )
{
if( stringEscape ) { val.string += str; stringEscape = false; }
else {
retval = -1;
if( stringOct )
throwError( "Incomplete Octal sequence", cInt );
else if( stringHex )
throwError( "Incomplete hexidecimal sequence", cInt );
else if( stringUnicode )
throwError( "Incomplete unicode sequence", cInt );
else if( unicodeWide )
throwError( "Incomplete long unicode sequence", cInt );
retval = 1;
}
}
else if( stringEscape ) {
if( stringOct ) {
if( hex_char_len < 3 && cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) {
hex_char *= 8;
hex_char += cInt - 0x30;
hex_char_len++;
if( hex_char_len === 3 ) {
val.string += String.fromCodePoint( hex_char );
stringOct = false;
stringEscape = false;
continue;
}
continue;
} else {
if( hex_char > 255 ) {
throwError( "(escaped character, parsing octal escape val=%d) fault while parsing", cInt );
retval = -1;
break;
}
val.string += String.fromCodePoint( hex_char );
stringOct = false;
stringEscape = false;
continue;
}
}
else if( unicodeWide ) {
if( cInt == 125/*'}'*/ ) {
val.string += String.fromCodePoint( hex_char );
unicodeWide = false;
stringUnicode = false;
stringEscape = false;
continue;
}
hex_char *= 16;
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) hex_char += cInt - 0x30;
else if( cInt >= 65/*'A'*/ && cInt <= 70/*'F'*/ ) hex_char += ( cInt - 65 ) + 10;
else if( cInt >= 97/*'a'*/ && cInt <= 102/*'f'*/ ) hex_char += ( cInt - 96 ) + 10;
else {
throwError( "(escaped character, parsing hex of \\u)", cInt );
retval = -1;
unicodeWide = false;
stringEscape = false;
continue;
}
continue;
}
else if( stringHex || stringUnicode ) {
if( hex_char_len === 0 && cInt === 123/*'{'*/ ) {
unicodeWide = true;
continue;
}
if( hex_char_len < 2 || ( stringUnicode && hex_char_len < 4 ) ) {
hex_char *= 16;
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ ) hex_char += cInt - 0x30;
else if( cInt >= 65/*'A'*/ && cInt <= 70/*'F'*/ ) hex_char += ( cInt - 65 ) + 10;
else if( cInt >= 97/*'a'*/ && cInt <= 102/*'f'*/ ) hex_char += ( cInt - 96 ) + 10;
else {
throwError( stringUnicode?"(escaped character, parsing hex of \\u)":"(escaped character, parsing hex of \\x)", cInt );
retval = -1;
stringHex = false;
stringEscape = false;
continue;
}
hex_char_len++;
if( stringUnicode ) {
if( hex_char_len == 4 ) {
val.string += String.fromCodePoint( hex_char );
stringUnicode = false;
stringEscape = false;
}
}
else if( hex_char_len == 2 ) {
val.string += String.fromCodePoint( hex_char );
stringHex = false;
stringEscape = false;
}
continue;
}
}
switch( cInt )
{
case 13/*'\r'*/:
cr_escaped = true;
pos.col = 1;
continue;
case 10/*'\n'*/:
case 2028: // LS (Line separator)
case 2029: // PS (paragraph separate)
pos.line++;
break;
case 116/*'t'*/:
val.string += '\t';
break;
case 98/*'b'*/:
val.string += '\b';
break;
case 110/*'n'*/:
val.string += '\n';
break;
case 114/*'r'*/:
val.string += '\r';
break;
case 102/*'f'*/:
val.string += '\f';
break;
case 48/*'0'*/: case 49/*'1'*/: case 50/*'2'*/: case 51/*'3'*/:
stringOct = true;
hex_char = cInt - 48;
hex_char_len = 1;
continue;
case 120/*'x'*/:
stringHex = true;
hex_char_len = 0;
hex_char = 0;
continue;
case 117/*'u'*/:
stringUnicode = true;
hex_char_len = 0;
hex_char = 0;
continue;
//case 47/*'/'*/:
//case 92/*'\\'*/:
//case 34/*'"'*/:
//case 39/*"'"*/:
//case 96/*'`'*/:
default:
val.string += str;
break;
}
//console.log( "other..." );
stringEscape = false;
}
else if( cInt === 92/*'\\'*/ )
{
if( stringEscape ) {
val.string += '\\';
stringEscape = false
}
else
stringEscape = true;
}
else
{
if( cr_escaped ) {
cr_escaped = false;
if( cInt == 10/*'\n'*/ ) {
pos.line++;
pos.col = 1;
stringEscape = false;
continue;
} else {
pos.line++;
pos.col = 1;
}
continue;
}
val.string += str;
}
}
return retval;
}
function collectNumber() {
let _n;
while( (_n = n) < buf.length )
{
str = buf.charAt(_n);
let cInt = buf.codePointAt(n++);
if( cInt >= 0x10000 ) { throwError( "fault while parsing number;", cInt ); str += buf.charAt(n); n++; }
if( _DEBUG_PARSING ) console.log( "in getting number:", n, cInt, String.fromCodePoint(cInt) );
if( cInt == 95 /*_*/ )
continue;
pos.col++;
// leading zeros should be forbidden.
if( cInt >= 48/*'0'*/ && cInt <= 57/*'9'*/ )
{
if( exponent ) {
exponent_digit = true;
}
val.string += str;
} else if( cInt == 45/*'-'*/ || cInt == 43/*'+'*/ ) {
if( val.string.length == 0 || ( exponent && !exponent_sign && !exponent_digit ) ) {
val.string += str;
exponent_sign = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
break;
}
} else if( cInt == 46/*'.'*/ ) {
if( !decimal && !fromHex && !exponent ) {
val.string += str;
decimal = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
break;
}
} else if( cInt == 120/*'x'*/ || cInt == 98/*'b'*/ || cInt == 111/*'o'*/
|| cInt == 88/*'X'*/ || cInt == 66/*'B'*/ || cInt == 79/*'O'*/ ) {
// hex conversion.
if( !fromHex && val.string == '0' ) {
fromHex = true;
val.string += str;
}
else {
status = false;
throwError( "fault while parsing number;", cInt );
break;
}
} else if( ( cInt == 101/*'e'*/ ) || ( cInt == 69/*'E'*/ ) ) {
if( !exponent ) {
val.string += str;
exponent = true;
} else {
status = false;
throwError( "fault while parsing number;", cInt );
break;
}
} else {
if( cInt == 32/*' '*/ || cInt == 13 || cInt == 10 || cInt == 9
|| cInt == 0xFEFF || cInt == 44/*','*/ || cInt == 125/*'}'*/ || cInt == 93/*']'*/
|| cInt == 58/*':'*/ ) {
break;
}
else {
if( complete_at_end ) {
status = false;
throwError( "fault while parsing number;", cInt );
}
break;
}
}
}
n = _n;
if( (!complete_at_end) && n == buf.length )
{
gatheringNumber = true;
}
else
{
gatheringNumber = false;
val.value_type = VALUE_NUMBER;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
}
if( !status )
return -1;
if( msg && msg.length ) {
input = getBuffer();
input.buf = msg;
inQueue.push( input );
} else {
if( gatheringNumber ) {
//console.log( "Force completed.")
gatheringNumber = false;
val.value_type = VALUE_NUMBER;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
retval = 1; // if returning buffers, then obviously there's more in this one.
}
}
while( status && ( input = inQueue.shift() ) ) {
n = input.n;
buf = input.buf;
if( gatheringString ) {
let string_status = gatherString( gatheringStringFirstChar );
if( string_status < 0 )
status = false;
else if( string_status > 0 )
{
gatheringString = false;
if( status ) val.value_type = VALUE_STRING;
}
}
if( gatheringNumber ) {
collectNumber();
}
while( !completed && status && ( n < buf.length ) )
{
str = buf.charAt(n);
cInt = buf.codePointAt(n++);
if( n >= 0x10000 ) { str += buf.charAt(n); n++; }
//if( _DEBUG_PARSING ) console.log( "parsing at ", cInt, str );
pos.col++;
if( comment ) {
if( comment == 1 ) {
if( cInt == 42/*'*'*/ ) { comment = 3; continue; }
if( cInt != 47/*'/'*/ ) {
throwError( "fault while parsing;", cInt );
status = false;
}
else comment = 2;
continue;
}
if( comment == 2 ) {
if( cInt == 10/*'\n'*/ ) { comment = 0; continue; }
else continue;
}
if( comment == 3 ){
if( cInt == 42/*'*'*/ ) { comment = 4; continue; }
else continue;
}
if( comment == 4 ) {
if( cInt == 47/*'/'*/ ) { comment = 0; continue; }
else { if( cInt != 42/*'*'*/ ) comment = 3; continue; }
}
}
switch( cInt )
{
case 47/*'/'*/:
if( !comment ) comment = 1;
break;
case 123/*'{'*/:
if( word == WORD_POS_FIELD || word == WORD_POS_AFTER_FIELD || ( parse_context == CONTEXT_OBJECT_FIELD && word == WORD_POS_RESET ) ) {
throwError( "fault while parsing; getting field name unexpected ", cInt );
status = false;
break;
}
{
let old_context = getContext();
if( _DEBUG_PARSING )
console.log( "Begin a new object; previously pushed into elements; but wait until trailing comma or close previously:%d", val.value_type );
val.value_type = VALUE_OBJECT;
let tmpobj = {};
if( parse_context == CONTEXT_UNKNOWN )
result = elements = tmpobj;
//else if( parse_context == CONTEXT_IN_ARRAY )
// element_array.push( tmpobj );
else if( parse_context == CONTEXT_OBJECT_FIELD_VALUE )
elements[val.name] = tmpobj;
old_context.context = parse_context;
old_context.elements = elements;
old_context.element_array = element_array;
old_context.name = val.name;
elements = tmpobj;
if( _DEBUG_PARSING_STACK ) console.log( "push context (open object): ", context_stack.length );
context_stack.push( old_context );
RESET_VAL();
parse_context = CONTEXT_OBJECT_FIELD;
}
break;
case 91/*'['*/:
if( parse_context == CONTEXT_OBJECT_FIELD || word == WORD_POS_FIELD || word == WORD_POS_AFTER_FIELD ) {
throwError( "Fault while parsing; while getting field name unexpected", cInt );
status = false;
break;
}
{
let old_context = getContext();
if( _DEBUG_PARSING )
console.log( "Begin a new array; previously pushed into elements; but wait until trailing comma or close previously:%d", val.value_type );
val.value_type = VALUE_ARRAY;
let tmparr = [];
if( parse_context == CONTEXT_UNKNOWN )
result = element_array = tmparr;
//else if( parse_context == CONTEXT_IN_ARRAY )
// element_array.push( tmparr );
else if( parse_context == CONTEXT_OBJECT_FIELD_VALUE )
elements[val.name] = tmparr;
old_context.context = parse_context;
old_context.elements = elements;
old_context.element_array = element_array;
old_context.name = val.name;
element_array = tmparr;
if( _DEBUG_PARSING_STACK ) console.log( "push context (open array): ", context_stack.length );
context_stack.push( old_context );
RESET_VAL();
parse_context = CONTEXT_IN_ARRAY;
}
break;
case 58/*':'*/:
//if(_DEBUG_PARSING) console.log( "colon context:", parse_context );
if( parse_context == CONTEXT_OBJECT_FIELD )
{
if( word != WORD_POS_RESET
&& word != WORD_POS_FIELD
&& word != WORD_POS_AFTER_FIELD ) {
// allow starting a new word
status = FALSE;
thorwError( `fault while parsing; unquoted keyword used as object field name (state:${word})`, cInt );
break;
}
word = WORD_POS_RESET;
val.name = val.string;
val.string = '';
parse_context = CONTEXT_OBJECT_FIELD_VALUE;
val.value_type = VALUE_UNSET;
}
else
{
if( parse_context == CONTEXT_IN_ARRAY )
throwError( "(in array, got colon out of string):parsing fault;", cInt );
else
throwError( "(outside any object, got colon out of string):parsing fault;", cInt );
status = false;
}
break;
case 125/*'}'*/:
//if(_DEBUG_PARSING) console.log( "close bracket context:", word, parse_context );
if( word == WORD_POS_END ) {
// allow starting a new word
word = WORD_POS_RESET;
}
// coming back after pushing an array or sub-object will reset the contxt to FIELD, so an end with a field should still push value.
if( ( parse_context == CONTEXT_OBJECT_FIELD ) ) {
if( _DEBUG_PARSING )
console.log( "close object; empty object %d", val.value_type );
RESET_VAL();
let old_context = context_stack.pop();
if( _DEBUG_PARSING_STACK ) console.log( "object pop stack (close obj)", context_stack.length, old_context );
parse_context = old_context.context; // this will restore as IN_ARRAY or OBJECT_FIELD
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else if( ( parse_context == CONTEXT_OBJECT_FIELD_VALUE ) )
{
// first, add the last value
if( _DEBUG_PARSING )
console.log( "close object; push item '%s' %d", val.name, val.value_type );
if( val.value_type != VALUE_UNSET ) {
objectPush();
}
val.value_type = VALUE_OBJECT;
val.contains = elements;
//let old_context = context_stack.pop();
var old_context = context_stack.pop();
if( _DEBUG_PARSING_STACK ) console.log( "object pop stack (close object)", context_stack.length, old_context );
val.name = old_context.name;
parse_context = old_context.context; // this will restore as IN_ARRAY or OBJECT_FIELD
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else
{
throwError( "Fault while parsing; unexpected", cInt );
status = false;
}
negative = false;
break;
case 93/*']'*/:
if( word == WORD_POS_END ) word = WORD_POS_RESET;
if( parse_context == CONTEXT_IN_ARRAY )
{
if( _DEBUG_PARSING )
console.log( "close array, push last element: %d", val.value_type );
if( val.value_type != VALUE_UNSET ) {
arrayPush();
}
//RESET_VAL();
val.value_type = VALUE_ARRAY;
val.contains = element_array;
{
var old_context = context_stack.pop();
if( _DEBUG_PARSING_STACK ) console.log( "object pop stack (close array)", context_stack.length );
val.name = old_context.name;
parse_context = old_context.context;
elements = old_context.elements;
element_array = old_context.element_array;
dropContext( old_context );
}
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
}
else
{
throwError( `bad context ${parse_context}; fault while parsing`, cInt );// fault
status = false;
}
negative = false;
break;
case 44/*','*/:
if( word == WORD_POS_END ) word = WORD_POS_RESET; // allow collect new keyword
if(_DEBUG_PARSING) console.log( "comma context:", parse_context, val );
if( parse_context == CONTEXT_IN_ARRAY )
{
if( val.value_type == VALUE_UNSET )
val.value_type = VALUE_EMPTY; // in an array, elements after a comma should init as undefined...
if( val.value_type != VALUE_UNSET ) {
if( _DEBUG_PARSING )
console.log( "back in array; push item %d", val.value_type );
arrayPush();
RESET_VAL();
}
// undefined allows [,,,] to be 4 values and [1,2,3,] to be 4 values with an undefined at end.
}
else if( parse_context == CONTEXT_OBJECT_FIELD_VALUE )
{
// after an array value, it will have returned to OBJECT_FIELD anyway
if( _DEBUG_PARSING )
console.log( "comma after field value, push field to object: %s", val.name );
parse_context = CONTEXT_OBJECT_FIELD;
if( val.value_type != VALUE_UNSET ) {
objectPush();
RESET_VAL();
}
}
else
{
status = false;
throwError( "bad context; excessive commas while parsing;", cInt );// fault
}
negative = false;
break;
default:
if( parse_context == CONTEXT_OBJECT_FIELD ) {
switch( cInt )
{
case 96://'`':
case 34://'"':
case 39://'\'':
if( word == WORD_POS_RESET ) {
let string_status = gatherString(cInt );
if(_DEBUG_PARSING) console.log( "string gather for object field name :", val.string, string_status );
if( string_status ) {
val.value_type = VALUE_STRING;
} else {
gatheringStringFirstChar = cInt;
gatheringString = true;
}
} else {
throwError( "fault while parsing; quote not at start of field name", cInt );
}
break;
case 10://'\n':
pos.line++;
pos.col = 1;
// fall through to normal space handling - just updated line/col position
case 13://'\r':
case 32://' ':
case 9://'\t':
case 0xFEFF: // ZWNBS is WS though
if( word == WORD_POS_END ) { // allow collect new keyword
word = WORD_POS_RESET;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
break;
}
if( word == WORD_POS_RESET || word == WORD_POS_AFTER_FIELD ) // ignore leading and trailing whitepsace
break;
else if( word == WORD_POS_FIELD ) {
word = WORD_POS_AFTER_FIELD;
}
else {
status = false;
throwError( "fault while parsing; whitepsace unexpected", cInt );
}
// skip whitespace
break;
default:
if( word == WORD_POS_AFTER_FIELD ) {
status = false;
throwError( "fault while parsing; character unexpected", cInt );
}
if( word == WORD_POS_RESET ) word = WORD_POS_FIELD;
val.string += str;
break; // default
}
}
else switch( cInt )
{
case 96://'`':
case 34://'"':
case 39://'\'':
{
let string_status = gatherString( cInt );
if(_DEBUG_PARSING) console.log( "string gather for object field value :", val.string, string_status, completed, input.n, buf.length );
if( string_status ) {
val.value_type = VALUE_STRING;
word = WORD_POS_END;
} else {
gatheringStringFirstChar = cInt;
gatheringString = true;
}
break;
}
case 10://'\n':
pos.line++;
pos.col = 1;
case 32://' ':
case 9://'\t':
case 13://'\r':
case 0xFEFF://'\uFEFF':
if( word == WORD_POS_END ) {
word = WORD_POS_RESET;
if( parse_context == CONTEXT_UNKNOWN ) {
completed = true;
}
break;
}
if( word == WORD_POS_RESET )
break;