diff options
Diffstat (limited to 'node_modules/js-yaml/lib/js-yaml/loader.js')
| -rw-r--r-- | node_modules/js-yaml/lib/js-yaml/loader.js | 1625 |
1 files changed, 1625 insertions, 0 deletions
diff --git a/node_modules/js-yaml/lib/js-yaml/loader.js b/node_modules/js-yaml/lib/js-yaml/loader.js new file mode 100644 index 0000000..2815c95 --- /dev/null +++ b/node_modules/js-yaml/lib/js-yaml/loader.js @@ -0,0 +1,1625 @@ +'use strict'; + +/*eslint-disable max-len,no-use-before-define*/ + +var common = require('./common'); +var YAMLException = require('./exception'); +var Mark = require('./mark'); +var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe'); +var DEFAULT_FULL_SCHEMA = require('./schema/default_full'); + + +var _hasOwnProperty = Object.prototype.hasOwnProperty; + + +var CONTEXT_FLOW_IN = 1; +var CONTEXT_FLOW_OUT = 2; +var CONTEXT_BLOCK_IN = 3; +var CONTEXT_BLOCK_OUT = 4; + + +var CHOMPING_CLIP = 1; +var CHOMPING_STRIP = 2; +var CHOMPING_KEEP = 3; + + +var PATTERN_NON_PRINTABLE = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/; +var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/; +var PATTERN_FLOW_INDICATORS = /[,\[\]\{\}]/; +var PATTERN_TAG_HANDLE = /^(?:!|!!|![a-z\-]+!)$/i; +var PATTERN_TAG_URI = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i; + + +function _class(obj) { return Object.prototype.toString.call(obj); } + +function is_EOL(c) { + return (c === 0x0A/* LF */) || (c === 0x0D/* CR */); +} + +function is_WHITE_SPACE(c) { + return (c === 0x09/* Tab */) || (c === 0x20/* Space */); +} + +function is_WS_OR_EOL(c) { + return (c === 0x09/* Tab */) || + (c === 0x20/* Space */) || + (c === 0x0A/* LF */) || + (c === 0x0D/* CR */); +} + +function is_FLOW_INDICATOR(c) { + return c === 0x2C/* , */ || + c === 0x5B/* [ */ || + c === 0x5D/* ] */ || + c === 0x7B/* { */ || + c === 0x7D/* } */; +} + +function fromHexCode(c) { + var lc; + + if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) { + return c - 0x30; + } + + /*eslint-disable no-bitwise*/ + lc = c | 0x20; + + if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) { + return lc - 0x61 + 10; + } + + return -1; +} + +function escapedHexLen(c) { + if (c === 0x78/* x */) { return 2; } + if (c === 0x75/* u */) { return 4; } + if (c === 0x55/* U */) { return 8; } + return 0; +} + +function fromDecimalCode(c) { + if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) { + return c - 0x30; + } + + return -1; +} + +function simpleEscapeSequence(c) { + /* eslint-disable indent */ + return (c === 0x30/* 0 */) ? '\x00' : + (c === 0x61/* a */) ? '\x07' : + (c === 0x62/* b */) ? '\x08' : + (c === 0x74/* t */) ? '\x09' : + (c === 0x09/* Tab */) ? '\x09' : + (c === 0x6E/* n */) ? '\x0A' : + (c === 0x76/* v */) ? '\x0B' : + (c === 0x66/* f */) ? '\x0C' : + (c === 0x72/* r */) ? '\x0D' : + (c === 0x65/* e */) ? '\x1B' : + (c === 0x20/* Space */) ? ' ' : + (c === 0x22/* " */) ? '\x22' : + (c === 0x2F/* / */) ? '/' : + (c === 0x5C/* \ */) ? '\x5C' : + (c === 0x4E/* N */) ? '\x85' : + (c === 0x5F/* _ */) ? '\xA0' : + (c === 0x4C/* L */) ? '\u2028' : + (c === 0x50/* P */) ? '\u2029' : ''; +} + +function charFromCodepoint(c) { + if (c <= 0xFFFF) { + return String.fromCharCode(c); + } + // Encode UTF-16 surrogate pair + // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF + return String.fromCharCode( + ((c - 0x010000) >> 10) + 0xD800, + ((c - 0x010000) & 0x03FF) + 0xDC00 + ); +} + +var simpleEscapeCheck = new Array(256); // integer, for fast access +var simpleEscapeMap = new Array(256); +for (var i = 0; i < 256; i++) { + simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0; + simpleEscapeMap[i] = simpleEscapeSequence(i); +} + + +function State(input, options) { + this.input = input; + + this.filename = options['filename'] || null; + this.schema = options['schema'] || DEFAULT_FULL_SCHEMA; + this.onWarning = options['onWarning'] || null; + this.legacy = options['legacy'] || false; + this.json = options['json'] || false; + this.listener = options['listener'] || null; + + this.implicitTypes = this.schema.compiledImplicit; + this.typeMap = this.schema.compiledTypeMap; + + this.length = input.length; + this.position = 0; + this.line = 0; + this.lineStart = 0; + this.lineIndent = 0; + + this.documents = []; + + /* + this.version; + this.checkLineBreaks; + this.tagMap; + this.anchorMap; + this.tag; + this.anchor; + this.kind; + this.result;*/ + +} + + +function generateError(state, message) { + return new YAMLException( + message, + new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart))); +} + +function throwError(state, message) { + throw generateError(state, message); +} + +function throwWarning(state, message) { + if (state.onWarning) { + state.onWarning.call(null, generateError(state, message)); + } +} + + +var directiveHandlers = { + + YAML: function handleYamlDirective(state, name, args) { + + var match, major, minor; + + if (state.version !== null) { + throwError(state, 'duplication of %YAML directive'); + } + + if (args.length !== 1) { + throwError(state, 'YAML directive accepts exactly one argument'); + } + + match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]); + + if (match === null) { + throwError(state, 'ill-formed argument of the YAML directive'); + } + + major = parseInt(match[1], 10); + minor = parseInt(match[2], 10); + + if (major !== 1) { + throwError(state, 'unacceptable YAML version of the document'); + } + + state.version = args[0]; + state.checkLineBreaks = (minor < 2); + + if (minor !== 1 && minor !== 2) { + throwWarning(state, 'unsupported YAML version of the document'); + } + }, + + TAG: function handleTagDirective(state, name, args) { + + var handle, prefix; + + if (args.length !== 2) { + throwError(state, 'TAG directive accepts exactly two arguments'); + } + + handle = args[0]; + prefix = args[1]; + + if (!PATTERN_TAG_HANDLE.test(handle)) { + throwError(state, 'ill-formed tag handle (first argument) of the TAG directive'); + } + + if (_hasOwnProperty.call(state.tagMap, handle)) { + throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle'); + } + + if (!PATTERN_TAG_URI.test(prefix)) { + throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive'); + } + + state.tagMap[handle] = prefix; + } +}; + + +function captureSegment(state, start, end, checkJson) { + var _position, _length, _character, _result; + + if (start < end) { + _result = state.input.slice(start, end); + + if (checkJson) { + for (_position = 0, _length = _result.length; _position < _length; _position += 1) { + _character = _result.charCodeAt(_position); + if (!(_character === 0x09 || + (0x20 <= _character && _character <= 0x10FFFF))) { + throwError(state, 'expected valid JSON character'); + } + } + } else if (PATTERN_NON_PRINTABLE.test(_result)) { + throwError(state, 'the stream contains non-printable characters'); + } + + state.result += _result; + } +} + +function mergeMappings(state, destination, source, overridableKeys) { + var sourceKeys, key, index, quantity; + + if (!common.isObject(source)) { + throwError(state, 'cannot merge mappings; the provided source object is unacceptable'); + } + + sourceKeys = Object.keys(source); + + for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) { + key = sourceKeys[index]; + + if (!_hasOwnProperty.call(destination, key)) { + destination[key] = source[key]; + overridableKeys[key] = true; + } + } +} + +function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) { + var index, quantity; + + // The output is a plain object here, so keys can only be strings. + // We need to convert keyNode to a string, but doing so can hang the process + // (deeply nested arrays that explode exponentially using aliases). + if (Array.isArray(keyNode)) { + keyNode = Array.prototype.slice.call(keyNode); + + for (index = 0, quantity = keyNode.length; index < quantity; index += 1) { + if (Array.isArray(keyNode[index])) { + throwError(state, 'nested arrays are not supported inside keys'); + } + + if (typeof keyNode === 'object' && _class(keyNode[index]) === '[object Object]') { + keyNode[index] = '[object Object]'; + } + } + } + + // Avoid code execution in load() via toString property + // (still use its own toString for arrays, timestamps, + // and whatever user schema extensions happen to have @@toStringTag) + if (typeof keyNode === 'object' && _class(keyNode) === '[object Object]') { + keyNode = '[object Object]'; + } + + + keyNode = String(keyNode); + + if (_result === null) { + _result = {}; + } + + if (keyTag === 'tag:yaml.org,2002:merge') { + if (Array.isArray(valueNode)) { + for (index = 0, quantity = valueNode.length; index < quantity; index += 1) { + mergeMappings(state, _result, valueNode[index], overridableKeys); + } + } else { + mergeMappings(state, _result, valueNode, overridableKeys); + } + } else { + if (!state.json && + !_hasOwnProperty.call(overridableKeys, keyNode) && + _hasOwnProperty.call(_result, keyNode)) { + state.line = startLine || state.line; + state.position = startPos || state.position; + throwError(state, 'duplicated mapping key'); + } + _result[keyNode] = valueNode; + delete overridableKeys[keyNode]; + } + + return _result; +} + +function readLineBreak(state) { + var ch; + + ch = state.input.charCodeAt(state.position); + + if (ch === 0x0A/* LF */) { + state.position++; + } else if (ch === 0x0D/* CR */) { + state.position++; + if (state.input.charCodeAt(state.position) === 0x0A/* LF */) { + state.position++; + } + } else { + throwError(state, 'a line break is expected'); + } + + state.line += 1; + state.lineStart = state.position; +} + +function skipSeparationSpace(state, allowComments, checkIndent) { + var lineBreaks = 0, + ch = state.input.charCodeAt(state.position); + + while (ch !== 0) { + while (is_WHITE_SPACE(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + if (allowComments && ch === 0x23/* # */) { + do { + ch = state.input.charCodeAt(++state.position); + } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0); + } + + if (is_EOL(ch)) { + readLineBreak(state); + + ch = state.input.charCodeAt(state.position); + lineBreaks++; + state.lineIndent = 0; + + while (ch === 0x20/* Space */) { + state.lineIndent++; + ch = state.input.charCodeAt(++state.position); + } + } else { + break; + } + } + + if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) { + throwWarning(state, 'deficient indentation'); + } + + return lineBreaks; +} + +function testDocumentSeparator(state) { + var _position = state.position, + ch; + + ch = state.input.charCodeAt(_position); + + // Condition state.position === state.lineStart is tested + // in parent on each call, for efficiency. No needs to test here again. + if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) && + ch === state.input.charCodeAt(_position + 1) && + ch === state.input.charCodeAt(_position + 2)) { + + _position += 3; + + ch = state.input.charCodeAt(_position); + + if (ch === 0 || is_WS_OR_EOL(ch)) { + return true; + } + } + + return false; +} + +function writeFoldedLines(state, count) { + if (count === 1) { + state.result += ' '; + } else if (count > 1) { + state.result += common.repeat('\n', count - 1); + } +} + + +function readPlainScalar(state, nodeIndent, withinFlowCollection) { + var preceding, + following, + captureStart, + captureEnd, + hasPendingContent, + _line, + _lineStart, + _lineIndent, + _kind = state.kind, + _result = state.result, + ch; + + ch = state.input.charCodeAt(state.position); + + if (is_WS_OR_EOL(ch) || + is_FLOW_INDICATOR(ch) || + ch === 0x23/* # */ || + ch === 0x26/* & */ || + ch === 0x2A/* * */ || + ch === 0x21/* ! */ || + ch === 0x7C/* | */ || + ch === 0x3E/* > */ || + ch === 0x27/* ' */ || + ch === 0x22/* " */ || + ch === 0x25/* % */ || + ch === 0x40/* @ */ || + ch === 0x60/* ` */) { + return false; + } + + if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) { + following = state.input.charCodeAt(state.position + 1); + + if (is_WS_OR_EOL(following) || + withinFlowCollection && is_FLOW_INDICATOR(following)) { + return false; + } + } + + state.kind = 'scalar'; + state.result = ''; + captureStart = captureEnd = state.position; + hasPendingContent = false; + + while (ch !== 0) { + if (ch === 0x3A/* : */) { + following = state.input.charCodeAt(state.position + 1); + + if (is_WS_OR_EOL(following) || + withinFlowCollection && is_FLOW_INDICATOR(following)) { + break; + } + + } else if (ch === 0x23/* # */) { + preceding = state.input.charCodeAt(state.position - 1); + + if (is_WS_OR_EOL(preceding)) { + break; + } + + } else if ((state.position === state.lineStart && testDocumentSeparator(state)) || + withinFlowCollection && is_FLOW_INDICATOR(ch)) { + break; + + } else if (is_EOL(ch)) { + _line = state.line; + _lineStart = state.lineStart; + _lineIndent = state.lineIndent; + skipSeparationSpace(state, false, -1); + + if (state.lineIndent >= nodeIndent) { + hasPendingContent = true; + ch = state.input.charCodeAt(state.position); + continue; + } else { + state.position = captureEnd; + state.line = _line; + state.lineStart = _lineStart; + state.lineIndent = _lineIndent; + break; + } + } + + if (hasPendingContent) { + captureSegment(state, captureStart, captureEnd, false); + writeFoldedLines(state, state.line - _line); + captureStart = captureEnd = state.position; + hasPendingContent = false; + } + + if (!is_WHITE_SPACE(ch)) { + captureEnd = state.position + 1; + } + + ch = state.input.charCodeAt(++state.position); + } + + captureSegment(state, captureStart, captureEnd, false); + + if (state.result) { + return true; + } + + state.kind = _kind; + state.result = _result; + return false; +} + +function readSingleQuotedScalar(state, nodeIndent) { + var ch, + captureStart, captureEnd; + + ch = state.input.charCodeAt(state.position); + + if (ch !== 0x27/* ' */) { + return false; + } + + state.kind = 'scalar'; + state.result = ''; + state.position++; + captureStart = captureEnd = state.position; + + while ((ch = state.input.charCodeAt(state.position)) !== 0) { + if (ch === 0x27/* ' */) { + captureSegment(state, captureStart, state.position, true); + ch = state.input.charCodeAt(++state.position); + + if (ch === 0x27/* ' */) { + captureStart = state.position; + state.position++; + captureEnd = state.position; + } else { + return true; + } + + } else if (is_EOL(ch)) { + captureSegment(state, captureStart, captureEnd, true); + writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent)); + captureStart = captureEnd = state.position; + + } else if (state.position === state.lineStart && testDocumentSeparator(state)) { + throwError(state, 'unexpected end of the document within a single quoted scalar'); + + } else { + state.position++; + captureEnd = state.position; + } + } + + throwError(state, 'unexpected end of the stream within a single quoted scalar'); +} + +function readDoubleQuotedScalar(state, nodeIndent) { + var captureStart, + captureEnd, + hexLength, + hexResult, + tmp, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch !== 0x22/* " */) { + return false; + } + + state.kind = 'scalar'; + state.result = ''; + state.position++; + captureStart = captureEnd = state.position; + + while ((ch = state.input.charCodeAt(state.position)) !== 0) { + if (ch === 0x22/* " */) { + captureSegment(state, captureStart, state.position, true); + state.position++; + return true; + + } else if (ch === 0x5C/* \ */) { + captureSegment(state, captureStart, state.position, true); + ch = state.input.charCodeAt(++state.position); + + if (is_EOL(ch)) { + skipSeparationSpace(state, false, nodeIndent); + + // TODO: rework to inline fn with no type cast? + } else if (ch < 256 && simpleEscapeCheck[ch]) { + state.result += simpleEscapeMap[ch]; + state.position++; + + } else if ((tmp = escapedHexLen(ch)) > 0) { + hexLength = tmp; + hexResult = 0; + + for (; hexLength > 0; hexLength--) { + ch = state.input.charCodeAt(++state.position); + + if ((tmp = fromHexCode(ch)) >= 0) { + hexResult = (hexResult << 4) + tmp; + + } else { + throwError(state, 'expected hexadecimal character'); + } + } + + state.result += charFromCodepoint(hexResult); + + state.position++; + + } else { + throwError(state, 'unknown escape sequence'); + } + + captureStart = captureEnd = state.position; + + } else if (is_EOL(ch)) { + captureSegment(state, captureStart, captureEnd, true); + writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent)); + captureStart = captureEnd = state.position; + + } else if (state.position === state.lineStart && testDocumentSeparator(state)) { + throwError(state, 'unexpected end of the document within a double quoted scalar'); + + } else { + state.position++; + captureEnd = state.position; + } + } + + throwError(state, 'unexpected end of the stream within a double quoted scalar'); +} + +function readFlowCollection(state, nodeIndent) { + var readNext = true, + _line, + _tag = state.tag, + _result, + _anchor = state.anchor, + following, + terminator, + isPair, + isExplicitPair, + isMapping, + overridableKeys = {}, + keyNode, + keyTag, + valueNode, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch === 0x5B/* [ */) { + terminator = 0x5D;/* ] */ + isMapping = false; + _result = []; + } else if (ch === 0x7B/* { */) { + terminator = 0x7D;/* } */ + isMapping = true; + _result = {}; + } else { + return false; + } + + if (state.anchor !== null) { + state.anchorMap[state.anchor] = _result; + } + + ch = state.input.charCodeAt(++state.position); + + while (ch !== 0) { + skipSeparationSpace(state, true, nodeIndent); + + ch = state.input.charCodeAt(state.position); + + if (ch === terminator) { + state.position++; + state.tag = _tag; + state.anchor = _anchor; + state.kind = isMapping ? 'mapping' : 'sequence'; + state.result = _result; + return true; + } else if (!readNext) { + throwError(state, 'missed comma between flow collection entries'); + } + + keyTag = keyNode = valueNode = null; + isPair = isExplicitPair = false; + + if (ch === 0x3F/* ? */) { + following = state.input.charCodeAt(state.position + 1); + + if (is_WS_OR_EOL(following)) { + isPair = isExplicitPair = true; + state.position++; + skipSeparationSpace(state, true, nodeIndent); + } + } + + _line = state.line; + composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true); + keyTag = state.tag; + keyNode = state.result; + skipSeparationSpace(state, true, nodeIndent); + + ch = state.input.charCodeAt(state.position); + + if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) { + isPair = true; + ch = state.input.charCodeAt(++state.position); + skipSeparationSpace(state, true, nodeIndent); + composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true); + valueNode = state.result; + } + + if (isMapping) { + storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode); + } else if (isPair) { + _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode)); + } else { + _result.push(keyNode); + } + + skipSeparationSpace(state, true, nodeIndent); + + ch = state.input.charCodeAt(state.position); + + if (ch === 0x2C/* , */) { + readNext = true; + ch = state.input.charCodeAt(++state.position); + } else { + readNext = false; + } + } + + throwError(state, 'unexpected end of the stream within a flow collection'); +} + +function readBlockScalar(state, nodeIndent) { + var captureStart, + folding, + chomping = CHOMPING_CLIP, + didReadContent = false, + detectedIndent = false, + textIndent = nodeIndent, + emptyLines = 0, + atMoreIndented = false, + tmp, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch === 0x7C/* | */) { + folding = false; + } else if (ch === 0x3E/* > */) { + folding = true; + } else { + return false; + } + + state.kind = 'scalar'; + state.result = ''; + + while (ch !== 0) { + ch = state.input.charCodeAt(++state.position); + + if (ch === 0x2B/* + */ || ch === 0x2D/* - */) { + if (CHOMPING_CLIP === chomping) { + chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP; + } else { + throwError(state, 'repeat of a chomping mode identifier'); + } + + } else if ((tmp = fromDecimalCode(ch)) >= 0) { + if (tmp === 0) { + throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one'); + } else if (!detectedIndent) { + textIndent = nodeIndent + tmp - 1; + detectedIndent = true; + } else { + throwError(state, 'repeat of an indentation width identifier'); + } + + } else { + break; + } + } + + if (is_WHITE_SPACE(ch)) { + do { ch = state.input.charCodeAt(++state.position); } + while (is_WHITE_SPACE(ch)); + + if (ch === 0x23/* # */) { + do { ch = state.input.charCodeAt(++state.position); } + while (!is_EOL(ch) && (ch !== 0)); + } + } + + while (ch !== 0) { + readLineBreak(state); + state.lineIndent = 0; + + ch = state.input.charCodeAt(state.position); + + while ((!detectedIndent || state.lineIndent < textIndent) && + (ch === 0x20/* Space */)) { + state.lineIndent++; + ch = state.input.charCodeAt(++state.position); + } + + if (!detectedIndent && state.lineIndent > textIndent) { + textIndent = state.lineIndent; + } + + if (is_EOL(ch)) { + emptyLines++; + continue; + } + + // End of the scalar. + if (state.lineIndent < textIndent) { + + // Perform the chomping. + if (chomping === CHOMPING_KEEP) { + state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines); + } else if (chomping === CHOMPING_CLIP) { + if (didReadContent) { // i.e. only if the scalar is not empty. + state.result += '\n'; + } + } + + // Break this `while` cycle and go to the funciton's epilogue. + break; + } + + // Folded style: use fancy rules to handle line breaks. + if (folding) { + + // Lines starting with white space characters (more-indented lines) are not folded. + if (is_WHITE_SPACE(ch)) { + atMoreIndented = true; + // except for the first content line (cf. Example 8.1) + state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines); + + // End of more-indented block. + } else if (atMoreIndented) { + atMoreIndented = false; + state.result += common.repeat('\n', emptyLines + 1); + + // Just one line break - perceive as the same line. + } else if (emptyLines === 0) { + if (didReadContent) { // i.e. only if we have already read some scalar content. + state.result += ' '; + } + + // Several line breaks - perceive as different lines. + } else { + state.result += common.repeat('\n', emptyLines); + } + + // Literal style: just add exact number of line breaks between content lines. + } else { + // Keep all line breaks except the header line break. + state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines); + } + + didReadContent = true; + detectedIndent = true; + emptyLines = 0; + captureStart = state.position; + + while (!is_EOL(ch) && (ch !== 0)) { + ch = state.input.charCodeAt(++state.position); + } + + captureSegment(state, captureStart, state.position, false); + } + + return true; +} + +function readBlockSequence(state, nodeIndent) { + var _line, + _tag = state.tag, + _anchor = state.anchor, + _result = [], + following, + detected = false, + ch; + + if (state.anchor !== null) { + state.anchorMap[state.anchor] = _result; + } + + ch = state.input.charCodeAt(state.position); + + while (ch !== 0) { + + if (ch !== 0x2D/* - */) { + break; + } + + following = state.input.charCodeAt(state.position + 1); + + if (!is_WS_OR_EOL(following)) { + break; + } + + detected = true; + state.position++; + + if (skipSeparationSpace(state, true, -1)) { + if (state.lineIndent <= nodeIndent) { + _result.push(null); + ch = state.input.charCodeAt(state.position); + continue; + } + } + + _line = state.line; + composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true); + _result.push(state.result); + skipSeparationSpace(state, true, -1); + + ch = state.input.charCodeAt(state.position); + + if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) { + throwError(state, 'bad indentation of a sequence entry'); + } else if (state.lineIndent < nodeIndent) { + break; + } + } + + if (detected) { + state.tag = _tag; + state.anchor = _anchor; + state.kind = 'sequence'; + state.result = _result; + return true; + } + return false; +} + +function readBlockMapping(state, nodeIndent, flowIndent) { + var following, + allowCompact, + _line, + _pos, + _tag = state.tag, + _anchor = state.anchor, + _result = {}, + overridableKeys = {}, + keyTag = null, + keyNode = null, + valueNode = null, + atExplicitKey = false, + detected = false, + ch; + + if (state.anchor !== null) { + state.anchorMap[state.anchor] = _result; + } + + ch = state.input.charCodeAt(state.position); + + while (ch !== 0) { + following = state.input.charCodeAt(state.position + 1); + _line = state.line; // Save the current line. + _pos = state.position; + + // + // Explicit notation case. There are two separate blocks: + // first for the key (denoted by "?") and second for the value (denoted by ":") + // + if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) { + + if (ch === 0x3F/* ? */) { + if (atExplicitKey) { + storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null); + keyTag = keyNode = valueNode = null; + } + + detected = true; + atExplicitKey = true; + allowCompact = true; + + } else if (atExplicitKey) { + // i.e. 0x3A/* : */ === character after the explicit key. + atExplicitKey = false; + allowCompact = true; + + } else { + throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line'); + } + + state.position += 1; + ch = following; + + // + // Implicit notation case. Flow-style node as the key first, then ":", and the value. + // + } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) { + + if (state.line === _line) { + ch = state.input.charCodeAt(state.position); + + while (is_WHITE_SPACE(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + if (ch === 0x3A/* : */) { + ch = state.input.charCodeAt(++state.position); + + if (!is_WS_OR_EOL(ch)) { + throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping'); + } + + if (atExplicitKey) { + storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null); + keyTag = keyNode = valueNode = null; + } + + detected = true; + atExplicitKey = false; + allowCompact = false; + keyTag = state.tag; + keyNode = state.result; + + } else if (detected) { + throwError(state, 'can not read an implicit mapping pair; a colon is missed'); + + } else { + state.tag = _tag; + state.anchor = _anchor; + return true; // Keep the result of `composeNode`. + } + + } else if (detected) { + throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key'); + + } else { + state.tag = _tag; + state.anchor = _anchor; + return true; // Keep the result of `composeNode`. + } + + } else { + break; // Reading is done. Go to the epilogue. + } + + // + // Common reading code for both explicit and implicit notations. + // + if (state.line === _line || state.lineIndent > nodeIndent) { + if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) { + if (atExplicitKey) { + keyNode = state.result; + } else { + valueNode = state.result; + } + } + + if (!atExplicitKey) { + storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _pos); + keyTag = keyNode = valueNode = null; + } + + skipSeparationSpace(state, true, -1); + ch = state.input.charCodeAt(state.position); + } + + if (state.lineIndent > nodeIndent && (ch !== 0)) { + throwError(state, 'bad indentation of a mapping entry'); + } else if (state.lineIndent < nodeIndent) { + break; + } + } + + // + // Epilogue. + // + + // Special case: last mapping's node contains only the key in explicit notation. + if (atExplicitKey) { + storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null); + } + + // Expose the resulting mapping. + if (detected) { + state.tag = _tag; + state.anchor = _anchor; + state.kind = 'mapping'; + state.result = _result; + } + + return detected; +} + +function readTagProperty(state) { + var _position, + isVerbatim = false, + isNamed = false, + tagHandle, + tagName, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch !== 0x21/* ! */) return false; + + if (state.tag !== null) { + throwError(state, 'duplication of a tag property'); + } + + ch = state.input.charCodeAt(++state.position); + + if (ch === 0x3C/* < */) { + isVerbatim = true; + ch = state.input.charCodeAt(++state.position); + + } else if (ch === 0x21/* ! */) { + isNamed = true; + tagHandle = '!!'; + ch = state.input.charCodeAt(++state.position); + + } else { + tagHandle = '!'; + } + + _position = state.position; + + if (isVerbatim) { + do { ch = state.input.charCodeAt(++state.position); } + while (ch !== 0 && ch !== 0x3E/* > */); + + if (state.position < state.length) { + tagName = state.input.slice(_position, state.position); + ch = state.input.charCodeAt(++state.position); + } else { + throwError(state, 'unexpected end of the stream within a verbatim tag'); + } + } else { + while (ch !== 0 && !is_WS_OR_EOL(ch)) { + + if (ch === 0x21/* ! */) { + if (!isNamed) { + tagHandle = state.input.slice(_position - 1, state.position + 1); + + if (!PATTERN_TAG_HANDLE.test(tagHandle)) { + throwError(state, 'named tag handle cannot contain such characters'); + } + + isNamed = true; + _position = state.position + 1; + } else { + throwError(state, 'tag suffix cannot contain exclamation marks'); + } + } + + ch = state.input.charCodeAt(++state.position); + } + + tagName = state.input.slice(_position, state.position); + + if (PATTERN_FLOW_INDICATORS.test(tagName)) { + throwError(state, 'tag suffix cannot contain flow indicator characters'); + } + } + + if (tagName && !PATTERN_TAG_URI.test(tagName)) { + throwError(state, 'tag name cannot contain such characters: ' + tagName); + } + + if (isVerbatim) { + state.tag = tagName; + + } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) { + state.tag = state.tagMap[tagHandle] + tagName; + + } else if (tagHandle === '!') { + state.tag = '!' + tagName; + + } else if (tagHandle === '!!') { + state.tag = 'tag:yaml.org,2002:' + tagName; + + } else { + throwError(state, 'undeclared tag handle "' + tagHandle + '"'); + } + + return true; +} + +function readAnchorProperty(state) { + var _position, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch !== 0x26/* & */) return false; + + if (state.anchor !== null) { + throwError(state, 'duplication of an anchor property'); + } + + ch = state.input.charCodeAt(++state.position); + _position = state.position; + + while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + if (state.position === _position) { + throwError(state, 'name of an anchor node must contain at least one character'); + } + + state.anchor = state.input.slice(_position, state.position); + return true; +} + +function readAlias(state) { + var _position, alias, + ch; + + ch = state.input.charCodeAt(state.position); + + if (ch !== 0x2A/* * */) return false; + + ch = state.input.charCodeAt(++state.position); + _position = state.position; + + while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + if (state.position === _position) { + throwError(state, 'name of an alias node must contain at least one character'); + } + + alias = state.input.slice(_position, state.position); + + if (!state.anchorMap.hasOwnProperty(alias)) { + throwError(state, 'unidentified alias "' + alias + '"'); + } + + state.result = state.anchorMap[alias]; + skipSeparationSpace(state, true, -1); + return true; +} + +function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) { + var allowBlockStyles, + allowBlockScalars, + allowBlockCollections, + indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent + atNewLine = false, + hasContent = false, + typeIndex, + typeQuantity, + type, + flowIndent, + blockIndent; + + if (state.listener !== null) { + state.listener('open', state); + } + + state.tag = null; + state.anchor = null; + state.kind = null; + state.result = null; + + allowBlockStyles = allowBlockScalars = allowBlockCollections = + CONTEXT_BLOCK_OUT === nodeContext || + CONTEXT_BLOCK_IN === nodeContext; + + if (allowToSeek) { + if (skipSeparationSpace(state, true, -1)) { + atNewLine = true; + + if (state.lineIndent > parentIndent) { + indentStatus = 1; + } else if (state.lineIndent === parentIndent) { + indentStatus = 0; + } else if (state.lineIndent < parentIndent) { + indentStatus = -1; + } + } + } + + if (indentStatus === 1) { + while (readTagProperty(state) || readAnchorProperty(state)) { + if (skipSeparationSpace(state, true, -1)) { + atNewLine = true; + allowBlockCollections = allowBlockStyles; + + if (state.lineIndent > parentIndent) { + indentStatus = 1; + } else if (state.lineIndent === parentIndent) { + indentStatus = 0; + } else if (state.lineIndent < parentIndent) { + indentStatus = -1; + } + } else { + allowBlockCollections = false; + } + } + } + + if (allowBlockCollections) { + allowBlockCollections = atNewLine || allowCompact; + } + + if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) { + if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) { + flowIndent = parentIndent; + } else { + flowIndent = parentIndent + 1; + } + + blockIndent = state.position - state.lineStart; + + if (indentStatus === 1) { + if (allowBlockCollections && + (readBlockSequence(state, blockIndent) || + readBlockMapping(state, blockIndent, flowIndent)) || + readFlowCollection(state, flowIndent)) { + hasContent = true; + } else { + if ((allowBlockScalars && readBlockScalar(state, flowIndent)) || + readSingleQuotedScalar(state, flowIndent) || + readDoubleQuotedScalar(state, flowIndent)) { + hasContent = true; + + } else if (readAlias(state)) { + hasContent = true; + + if (state.tag !== null || state.anchor !== null) { + throwError(state, 'alias node should not have any properties'); + } + + } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) { + hasContent = true; + + if (state.tag === null) { + state.tag = '?'; + } + } + + if (state.anchor !== null) { + state.anchorMap[state.anchor] = state.result; + } + } + } else if (indentStatus === 0) { + // Special case: block sequences are allowed to have same indentation level as the parent. + // http://www.yaml.org/spec/1.2/spec.html#id2799784 + hasContent = allowBlockCollections && readBlockSequence(state, blockIndent); + } + } + + if (state.tag !== null && state.tag !== '!') { + if (state.tag === '?') { + for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) { + type = state.implicitTypes[typeIndex]; + + // Implicit resolving is not allowed for non-scalar types, and '?' + // non-specific tag is only assigned to plain scalars. So, it isn't + // needed to check for 'kind' conformity. + + if (type.resolve(state.result)) { // `state.result` updated in resolver if matched + state.result = type.construct(state.result); + state.tag = type.tag; + if (state.anchor !== null) { + state.anchorMap[state.anchor] = state.result; + } + break; + } + } + } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) { + type = state.typeMap[state.kind || 'fallback'][state.tag]; + + if (state.result !== null && type.kind !== state.kind) { + throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"'); + } + + if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched + throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag'); + } else { + state.result = type.construct(state.result); + if (state.anchor !== null) { + state.anchorMap[state.anchor] = state.result; + } + } + } else { + throwError(state, 'unknown tag !<' + state.tag + '>'); + } + } + + if (state.listener !== null) { + state.listener('close', state); + } + return state.tag !== null || state.anchor !== null || hasContent; +} + +function readDocument(state) { + var documentStart = state.position, + _position, + directiveName, + directiveArgs, + hasDirectives = false, + ch; + + state.version = null; + state.checkLineBreaks = state.legacy; + state.tagMap = {}; + state.anchorMap = {}; + + while ((ch = state.input.charCodeAt(state.position)) !== 0) { + skipSeparationSpace(state, true, -1); + + ch = state.input.charCodeAt(state.position); + + if (state.lineIndent > 0 || ch !== 0x25/* % */) { + break; + } + + hasDirectives = true; + ch = state.input.charCodeAt(++state.position); + _position = state.position; + + while (ch !== 0 && !is_WS_OR_EOL(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + directiveName = state.input.slice(_position, state.position); + directiveArgs = []; + + if (directiveName.length < 1) { + throwError(state, 'directive name must not be less than one character in length'); + } + + while (ch !== 0) { + while (is_WHITE_SPACE(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + if (ch === 0x23/* # */) { + do { ch = state.input.charCodeAt(++state.position); } + while (ch !== 0 && !is_EOL(ch)); + break; + } + + if (is_EOL(ch)) break; + + _position = state.position; + + while (ch !== 0 && !is_WS_OR_EOL(ch)) { + ch = state.input.charCodeAt(++state.position); + } + + directiveArgs.push(state.input.slice(_position, state.position)); + } + + if (ch !== 0) readLineBreak(state); + + if (_hasOwnProperty.call(directiveHandlers, directiveName)) { + directiveHandlers[directiveName](state, directiveName, directiveArgs); + } else { + throwWarning(state, 'unknown document directive "' + directiveName + '"'); + } + } + + skipSeparationSpace(state, true, -1); + + if (state.lineIndent === 0 && + state.input.charCodeAt(state.position) === 0x2D/* - */ && + state.input.charCodeAt(state.position + 1) === 0x2D/* - */ && + state.input.charCodeAt(state.position + 2) === 0x2D/* - */) { + state.position += 3; + skipSeparationSpace(state, true, -1); + + } else if (hasDirectives) { + throwError(state, 'directives end mark is expected'); + } + + composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true); + skipSeparationSpace(state, true, -1); + + if (state.checkLineBreaks && + PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) { + throwWarning(state, 'non-ASCII line breaks are interpreted as content'); + } + + state.documents.push(state.result); + + if (state.position === state.lineStart && testDocumentSeparator(state)) { + + if (state.input.charCodeAt(state.position) === 0x2E/* . */) { + state.position += 3; + skipSeparationSpace(state, true, -1); + } + return; + } + + if (state.position < (state.length - 1)) { + throwError(state, 'end of the stream or a document separator is expected'); + } else { + return; + } +} + + +function loadDocuments(input, options) { + input = String(input); + options = options || {}; + + if (input.length !== 0) { + + // Add tailing `\n` if not exists + if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ && + input.charCodeAt(input.length - 1) !== 0x0D/* CR */) { + input += '\n'; + } + + // Strip BOM + if (input.charCodeAt(0) === 0xFEFF) { + input = input.slice(1); + } + } + + var state = new State(input, options); + + // Use 0 as string terminator. That significantly simplifies bounds check. + state.input += '\0'; + + while (state.input.charCodeAt(state.position) === 0x20/* Space */) { + state.lineIndent += 1; + state.position += 1; + } + + while (state.position < (state.length - 1)) { + readDocument(state); + } + + return state.documents; +} + + +function loadAll(input, iterator, options) { + var documents = loadDocuments(input, options), index, length; + + if (typeof iterator !== 'function') { + return documents; + } + + for (index = 0, length = documents.length; index < length; index += 1) { + iterator(documents[index]); + } +} + + +function load(input, options) { + var documents = loadDocuments(input, options); + + if (documents.length === 0) { + /*eslint-disable no-undefined*/ + return undefined; + } else if (documents.length === 1) { + return documents[0]; + } + throw new YAMLException('expected a single document in the stream, but found more'); +} + + +function safeLoadAll(input, output, options) { + if (typeof output === 'function') { + loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options)); + } else { + return loadAll(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options)); + } +} + + +function safeLoad(input, options) { + return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options)); +} + + +module.exports.loadAll = loadAll; +module.exports.load = load; +module.exports.safeLoadAll = safeLoadAll; +module.exports.safeLoad = safeLoad; |