csv-parse
Version:
CSV parsing implementing the Node.js `stream.Transform` API
3,304 lines • 107 kB
JavaScript
var global$1 = (typeof global !== "undefined" ? global :
typeof self !== "undefined" ? self :
typeof window !== "undefined" ? window : {});
var lookup = [];
var revLookup = [];
var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array;
var inited = false;
function init () {
inited = true;
var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
for (var i = 0, len = code.length; i < len; ++i) {
lookup[i] = code[i];
revLookup[code.charCodeAt(i)] = i;
}
revLookup['-'.charCodeAt(0)] = 62;
revLookup['_'.charCodeAt(0)] = 63;
}
function toByteArray (b64) {
if (!inited) {
init();
}
var i, j, l, tmp, placeHolders, arr;
var len = b64.length;
if (len % 4 > 0) {
throw new Error('Invalid string. Length must be a multiple of 4')
}
// the number of equal signs (place holders)
// if there are two placeholders, than the two characters before it
// represent one byte
// if there is only one, then the three characters before it represent 2 bytes
// this is just a cheap hack to not do indexOf twice
placeHolders = b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0;
// base64 is 4/3 + up to two characters of the original data
arr = new Arr(len * 3 / 4 - placeHolders);
// if there are placeholders, only get up to the last complete 4 chars
l = placeHolders > 0 ? len - 4 : len;
var L = 0;
for (i = 0, j = 0; i < l; i += 4, j += 3) {
tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)];
arr[L++] = (tmp >> 16) & 0xFF;
arr[L++] = (tmp >> 8) & 0xFF;
arr[L++] = tmp & 0xFF;
}
if (placeHolders === 2) {
tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4);
arr[L++] = tmp & 0xFF;
} else if (placeHolders === 1) {
tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2);
arr[L++] = (tmp >> 8) & 0xFF;
arr[L++] = tmp & 0xFF;
}
return arr
}
function tripletToBase64 (num) {
return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
}
function encodeChunk (uint8, start, end) {
var tmp;
var output = [];
for (var i = start; i < end; i += 3) {
tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2]);
output.push(tripletToBase64(tmp));
}
return output.join('')
}
function fromByteArray (uint8) {
if (!inited) {
init();
}
var tmp;
var len = uint8.length;
var extraBytes = len % 3; // if we have 1 byte left, pad 2 bytes
var output = '';
var parts = [];
var maxChunkLength = 16383; // must be multiple of 3
// go through the array every three bytes, we'll deal with trailing stuff later
for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)));
}
// pad the end with zeros, but make sure to not forget the extra bytes
if (extraBytes === 1) {
tmp = uint8[len - 1];
output += lookup[tmp >> 2];
output += lookup[(tmp << 4) & 0x3F];
output += '==';
} else if (extraBytes === 2) {
tmp = (uint8[len - 2] << 8) + (uint8[len - 1]);
output += lookup[tmp >> 10];
output += lookup[(tmp >> 4) & 0x3F];
output += lookup[(tmp << 2) & 0x3F];
output += '=';
}
parts.push(output);
return parts.join('')
}
function read (buffer, offset, isLE, mLen, nBytes) {
var e, m;
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var nBits = -7;
var i = isLE ? (nBytes - 1) : 0;
var d = isLE ? -1 : 1;
var s = buffer[offset + i];
i += d;
e = s & ((1 << (-nBits)) - 1);
s >>= (-nBits);
nBits += eLen;
for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
m = e & ((1 << (-nBits)) - 1);
e >>= (-nBits);
nBits += mLen;
for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
if (e === 0) {
e = 1 - eBias;
} else if (e === eMax) {
return m ? NaN : ((s ? -1 : 1) * Infinity)
} else {
m = m + Math.pow(2, mLen);
e = e - eBias;
}
return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
}
function write (buffer, value, offset, isLE, mLen, nBytes) {
var e, m, c;
var eLen = nBytes * 8 - mLen - 1;
var eMax = (1 << eLen) - 1;
var eBias = eMax >> 1;
var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
var i = isLE ? 0 : (nBytes - 1);
var d = isLE ? 1 : -1;
var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
value = Math.abs(value);
if (isNaN(value) || value === Infinity) {
m = isNaN(value) ? 1 : 0;
e = eMax;
} else {
e = Math.floor(Math.log(value) / Math.LN2);
if (value * (c = Math.pow(2, -e)) < 1) {
e--;
c *= 2;
}
if (e + eBias >= 1) {
value += rt / c;
} else {
value += rt * Math.pow(2, 1 - eBias);
}
if (value * c >= 2) {
e++;
c /= 2;
}
if (e + eBias >= eMax) {
m = 0;
e = eMax;
} else if (e + eBias >= 1) {
m = (value * c - 1) * Math.pow(2, mLen);
e = e + eBias;
} else {
m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
e = 0;
}
}
for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
e = (e << mLen) | m;
eLen += mLen;
for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
buffer[offset + i - d] |= s * 128;
}
var toString = {}.toString;
var isArray = Array.isArray || function (arr) {
return toString.call(arr) == '[object Array]';
};
var INSPECT_MAX_BYTES = 50;
/**
* If `Buffer.TYPED_ARRAY_SUPPORT`:
* === true Use Uint8Array implementation (fastest)
* === false Use Object implementation (most compatible, even IE6)
*
* Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
* Opera 11.6+, iOS 4.2+.
*
* Due to various browser bugs, sometimes the Object implementation will be used even
* when the browser supports typed arrays.
*
* Note:
*
* - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
* See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
*
* - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
*
* - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
* incorrect length in some situations.
* We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
* get the Object implementation, which is slower but behaves correctly.
*/
Buffer.TYPED_ARRAY_SUPPORT = global$1.TYPED_ARRAY_SUPPORT !== undefined
? global$1.TYPED_ARRAY_SUPPORT
: true;
/*
* Export kMaxLength after typed array support is determined.
*/
kMaxLength();
function kMaxLength () {
return Buffer.TYPED_ARRAY_SUPPORT
? 0x7fffffff
: 0x3fffffff
}
function createBuffer (that, length) {
if (kMaxLength() < length) {
throw new RangeError('Invalid typed array length')
}
if (Buffer.TYPED_ARRAY_SUPPORT) {
// Return an augmented `Uint8Array` instance, for best performance
that = new Uint8Array(length);
that.__proto__ = Buffer.prototype;
} else {
// Fallback: Return an object instance of the Buffer class
if (that === null) {
that = new Buffer(length);
}
that.length = length;
}
return that
}
/**
* The Buffer constructor returns instances of `Uint8Array` that have their
* prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
* `Uint8Array`, so the returned instances will have all the node `Buffer` methods
* and the `Uint8Array` methods. Square bracket notation works as expected -- it
* returns a single octet.
*
* The `Uint8Array` prototype remains unmodified.
*/
function Buffer (arg, encodingOrOffset, length) {
if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
return new Buffer(arg, encodingOrOffset, length)
}
// Common case.
if (typeof arg === 'number') {
if (typeof encodingOrOffset === 'string') {
throw new Error(
'If encoding is specified then the first argument must be a string'
)
}
return allocUnsafe(this, arg)
}
return from(this, arg, encodingOrOffset, length)
}
Buffer.poolSize = 8192; // not used by this implementation
// TODO: Legacy, not needed anymore. Remove in next major version.
Buffer._augment = function (arr) {
arr.__proto__ = Buffer.prototype;
return arr
};
function from (that, value, encodingOrOffset, length) {
if (typeof value === 'number') {
throw new TypeError('"value" argument must not be a number')
}
if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
return fromArrayBuffer(that, value, encodingOrOffset, length)
}
if (typeof value === 'string') {
return fromString(that, value, encodingOrOffset)
}
return fromObject(that, value)
}
/**
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
* if value is a number.
* Buffer.from(str[, encoding])
* Buffer.from(array)
* Buffer.from(buffer)
* Buffer.from(arrayBuffer[, byteOffset[, length]])
**/
Buffer.from = function (value, encodingOrOffset, length) {
return from(null, value, encodingOrOffset, length)
};
if (Buffer.TYPED_ARRAY_SUPPORT) {
Buffer.prototype.__proto__ = Uint8Array.prototype;
Buffer.__proto__ = Uint8Array;
if (typeof Symbol !== 'undefined' && Symbol.species &&
Buffer[Symbol.species] === Buffer) ;
}
function assertSize (size) {
if (typeof size !== 'number') {
throw new TypeError('"size" argument must be a number')
} else if (size < 0) {
throw new RangeError('"size" argument must not be negative')
}
}
function alloc (that, size, fill, encoding) {
assertSize(size);
if (size <= 0) {
return createBuffer(that, size)
}
if (fill !== undefined) {
// Only pay attention to encoding if it's a string. This
// prevents accidentally sending in a number that would
// be interpretted as a start offset.
return typeof encoding === 'string'
? createBuffer(that, size).fill(fill, encoding)
: createBuffer(that, size).fill(fill)
}
return createBuffer(that, size)
}
/**
* Creates a new filled Buffer instance.
* alloc(size[, fill[, encoding]])
**/
Buffer.alloc = function (size, fill, encoding) {
return alloc(null, size, fill, encoding)
};
function allocUnsafe (that, size) {
assertSize(size);
that = createBuffer(that, size < 0 ? 0 : checked(size) | 0);
if (!Buffer.TYPED_ARRAY_SUPPORT) {
for (var i = 0; i < size; ++i) {
that[i] = 0;
}
}
return that
}
/**
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
* */
Buffer.allocUnsafe = function (size) {
return allocUnsafe(null, size)
};
/**
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
*/
Buffer.allocUnsafeSlow = function (size) {
return allocUnsafe(null, size)
};
function fromString (that, string, encoding) {
if (typeof encoding !== 'string' || encoding === '') {
encoding = 'utf8';
}
if (!Buffer.isEncoding(encoding)) {
throw new TypeError('"encoding" must be a valid string encoding')
}
var length = byteLength(string, encoding) | 0;
that = createBuffer(that, length);
var actual = that.write(string, encoding);
if (actual !== length) {
// Writing a hex string, for example, that contains invalid characters will
// cause everything after the first invalid character to be ignored. (e.g.
// 'abxxcd' will be treated as 'ab')
that = that.slice(0, actual);
}
return that
}
function fromArrayLike (that, array) {
var length = array.length < 0 ? 0 : checked(array.length) | 0;
that = createBuffer(that, length);
for (var i = 0; i < length; i += 1) {
that[i] = array[i] & 255;
}
return that
}
function fromArrayBuffer (that, array, byteOffset, length) {
array.byteLength; // this throws if `array` is not a valid ArrayBuffer
if (byteOffset < 0 || array.byteLength < byteOffset) {
throw new RangeError('\'offset\' is out of bounds')
}
if (array.byteLength < byteOffset + (length || 0)) {
throw new RangeError('\'length\' is out of bounds')
}
if (byteOffset === undefined && length === undefined) {
array = new Uint8Array(array);
} else if (length === undefined) {
array = new Uint8Array(array, byteOffset);
} else {
array = new Uint8Array(array, byteOffset, length);
}
if (Buffer.TYPED_ARRAY_SUPPORT) {
// Return an augmented `Uint8Array` instance, for best performance
that = array;
that.__proto__ = Buffer.prototype;
} else {
// Fallback: Return an object instance of the Buffer class
that = fromArrayLike(that, array);
}
return that
}
function fromObject (that, obj) {
if (internalIsBuffer(obj)) {
var len = checked(obj.length) | 0;
that = createBuffer(that, len);
if (that.length === 0) {
return that
}
obj.copy(that, 0, 0, len);
return that
}
if (obj) {
if ((typeof ArrayBuffer !== 'undefined' &&
obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
if (typeof obj.length !== 'number' || isnan(obj.length)) {
return createBuffer(that, 0)
}
return fromArrayLike(that, obj)
}
if (obj.type === 'Buffer' && isArray(obj.data)) {
return fromArrayLike(that, obj.data)
}
}
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}
function checked (length) {
// Note: cannot use `length < kMaxLength()` here because that fails when
// length is NaN (which is otherwise coerced to zero.)
if (length >= kMaxLength()) {
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
'size: 0x' + kMaxLength().toString(16) + ' bytes')
}
return length | 0
}
Buffer.isBuffer = isBuffer;
function internalIsBuffer (b) {
return !!(b != null && b._isBuffer)
}
Buffer.compare = function compare (a, b) {
if (!internalIsBuffer(a) || !internalIsBuffer(b)) {
throw new TypeError('Arguments must be Buffers')
}
if (a === b) return 0
var x = a.length;
var y = b.length;
for (var i = 0, len = Math.min(x, y); i < len; ++i) {
if (a[i] !== b[i]) {
x = a[i];
y = b[i];
break
}
}
if (x < y) return -1
if (y < x) return 1
return 0
};
Buffer.isEncoding = function isEncoding (encoding) {
switch (String(encoding).toLowerCase()) {
case 'hex':
case 'utf8':
case 'utf-8':
case 'ascii':
case 'latin1':
case 'binary':
case 'base64':
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return true
default:
return false
}
};
Buffer.concat = function concat (list, length) {
if (!isArray(list)) {
throw new TypeError('"list" argument must be an Array of Buffers')
}
if (list.length === 0) {
return Buffer.alloc(0)
}
var i;
if (length === undefined) {
length = 0;
for (i = 0; i < list.length; ++i) {
length += list[i].length;
}
}
var buffer = Buffer.allocUnsafe(length);
var pos = 0;
for (i = 0; i < list.length; ++i) {
var buf = list[i];
if (!internalIsBuffer(buf)) {
throw new TypeError('"list" argument must be an Array of Buffers')
}
buf.copy(buffer, pos);
pos += buf.length;
}
return buffer
};
function byteLength (string, encoding) {
if (internalIsBuffer(string)) {
return string.length
}
if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
(ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
return string.byteLength
}
if (typeof string !== 'string') {
string = '' + string;
}
var len = string.length;
if (len === 0) return 0
// Use a for loop to avoid recursion
var loweredCase = false;
for (;;) {
switch (encoding) {
case 'ascii':
case 'latin1':
case 'binary':
return len
case 'utf8':
case 'utf-8':
case undefined:
return utf8ToBytes(string).length
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return len * 2
case 'hex':
return len >>> 1
case 'base64':
return base64ToBytes(string).length
default:
if (loweredCase) return utf8ToBytes(string).length // assume utf8
encoding = ('' + encoding).toLowerCase();
loweredCase = true;
}
}
}
Buffer.byteLength = byteLength;
function slowToString (encoding, start, end) {
var loweredCase = false;
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only
// property of a typed array.
// This behaves neither like String nor Uint8Array in that we set start/end
// to their upper/lower bounds if the value passed is out of range.
// undefined is handled specially as per ECMA-262 6th Edition,
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
if (start === undefined || start < 0) {
start = 0;
}
// Return early if start > this.length. Done here to prevent potential uint32
// coercion fail below.
if (start > this.length) {
return ''
}
if (end === undefined || end > this.length) {
end = this.length;
}
if (end <= 0) {
return ''
}
// Force coersion to uint32. This will also coerce falsey/NaN values to 0.
end >>>= 0;
start >>>= 0;
if (end <= start) {
return ''
}
if (!encoding) encoding = 'utf8';
while (true) {
switch (encoding) {
case 'hex':
return hexSlice(this, start, end)
case 'utf8':
case 'utf-8':
return utf8Slice(this, start, end)
case 'ascii':
return asciiSlice(this, start, end)
case 'latin1':
case 'binary':
return latin1Slice(this, start, end)
case 'base64':
return base64Slice(this, start, end)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return utf16leSlice(this, start, end)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = (encoding + '').toLowerCase();
loweredCase = true;
}
}
}
// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
// Buffer instances.
Buffer.prototype._isBuffer = true;
function swap (b, n, m) {
var i = b[n];
b[n] = b[m];
b[m] = i;
}
Buffer.prototype.swap16 = function swap16 () {
var len = this.length;
if (len % 2 !== 0) {
throw new RangeError('Buffer size must be a multiple of 16-bits')
}
for (var i = 0; i < len; i += 2) {
swap(this, i, i + 1);
}
return this
};
Buffer.prototype.swap32 = function swap32 () {
var len = this.length;
if (len % 4 !== 0) {
throw new RangeError('Buffer size must be a multiple of 32-bits')
}
for (var i = 0; i < len; i += 4) {
swap(this, i, i + 3);
swap(this, i + 1, i + 2);
}
return this
};
Buffer.prototype.swap64 = function swap64 () {
var len = this.length;
if (len % 8 !== 0) {
throw new RangeError('Buffer size must be a multiple of 64-bits')
}
for (var i = 0; i < len; i += 8) {
swap(this, i, i + 7);
swap(this, i + 1, i + 6);
swap(this, i + 2, i + 5);
swap(this, i + 3, i + 4);
}
return this
};
Buffer.prototype.toString = function toString () {
var length = this.length | 0;
if (length === 0) return ''
if (arguments.length === 0) return utf8Slice(this, 0, length)
return slowToString.apply(this, arguments)
};
Buffer.prototype.equals = function equals (b) {
if (!internalIsBuffer(b)) throw new TypeError('Argument must be a Buffer')
if (this === b) return true
return Buffer.compare(this, b) === 0
};
Buffer.prototype.inspect = function inspect () {
var str = '';
var max = INSPECT_MAX_BYTES;
if (this.length > 0) {
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ');
if (this.length > max) str += ' ... ';
}
return '<Buffer ' + str + '>'
};
Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
if (!internalIsBuffer(target)) {
throw new TypeError('Argument must be a Buffer')
}
if (start === undefined) {
start = 0;
}
if (end === undefined) {
end = target ? target.length : 0;
}
if (thisStart === undefined) {
thisStart = 0;
}
if (thisEnd === undefined) {
thisEnd = this.length;
}
if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
throw new RangeError('out of range index')
}
if (thisStart >= thisEnd && start >= end) {
return 0
}
if (thisStart >= thisEnd) {
return -1
}
if (start >= end) {
return 1
}
start >>>= 0;
end >>>= 0;
thisStart >>>= 0;
thisEnd >>>= 0;
if (this === target) return 0
var x = thisEnd - thisStart;
var y = end - start;
var len = Math.min(x, y);
var thisCopy = this.slice(thisStart, thisEnd);
var targetCopy = target.slice(start, end);
for (var i = 0; i < len; ++i) {
if (thisCopy[i] !== targetCopy[i]) {
x = thisCopy[i];
y = targetCopy[i];
break
}
}
if (x < y) return -1
if (y < x) return 1
return 0
};
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
// Empty buffer means no match
if (buffer.length === 0) return -1
// Normalize byteOffset
if (typeof byteOffset === 'string') {
encoding = byteOffset;
byteOffset = 0;
} else if (byteOffset > 0x7fffffff) {
byteOffset = 0x7fffffff;
} else if (byteOffset < -0x80000000) {
byteOffset = -0x80000000;
}
byteOffset = +byteOffset; // Coerce to Number.
if (isNaN(byteOffset)) {
// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
byteOffset = dir ? 0 : (buffer.length - 1);
}
// Normalize byteOffset: negative offsets start from the end of the buffer
if (byteOffset < 0) byteOffset = buffer.length + byteOffset;
if (byteOffset >= buffer.length) {
if (dir) return -1
else byteOffset = buffer.length - 1;
} else if (byteOffset < 0) {
if (dir) byteOffset = 0;
else return -1
}
// Normalize val
if (typeof val === 'string') {
val = Buffer.from(val, encoding);
}
// Finally, search either indexOf (if dir is true) or lastIndexOf
if (internalIsBuffer(val)) {
// Special case: looking for empty string/buffer always fails
if (val.length === 0) {
return -1
}
return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
} else if (typeof val === 'number') {
val = val & 0xFF; // Search for a byte value [0-255]
if (Buffer.TYPED_ARRAY_SUPPORT &&
typeof Uint8Array.prototype.indexOf === 'function') {
if (dir) {
return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
} else {
return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
}
}
return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
}
throw new TypeError('val must be string, number or Buffer')
}
function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
var indexSize = 1;
var arrLength = arr.length;
var valLength = val.length;
if (encoding !== undefined) {
encoding = String(encoding).toLowerCase();
if (encoding === 'ucs2' || encoding === 'ucs-2' ||
encoding === 'utf16le' || encoding === 'utf-16le') {
if (arr.length < 2 || val.length < 2) {
return -1
}
indexSize = 2;
arrLength /= 2;
valLength /= 2;
byteOffset /= 2;
}
}
function read (buf, i) {
if (indexSize === 1) {
return buf[i]
} else {
return buf.readUInt16BE(i * indexSize)
}
}
var i;
if (dir) {
var foundIndex = -1;
for (i = byteOffset; i < arrLength; i++) {
if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
if (foundIndex === -1) foundIndex = i;
if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
} else {
if (foundIndex !== -1) i -= i - foundIndex;
foundIndex = -1;
}
}
} else {
if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength;
for (i = byteOffset; i >= 0; i--) {
var found = true;
for (var j = 0; j < valLength; j++) {
if (read(arr, i + j) !== read(val, j)) {
found = false;
break
}
}
if (found) return i
}
}
return -1
}
Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
return this.indexOf(val, byteOffset, encoding) !== -1
};
Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
};
Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
};
function hexWrite (buf, string, offset, length) {
offset = Number(offset) || 0;
var remaining = buf.length - offset;
if (!length) {
length = remaining;
} else {
length = Number(length);
if (length > remaining) {
length = remaining;
}
}
// must be an even number of digits
var strLen = string.length;
if (strLen % 2 !== 0) throw new TypeError('Invalid hex string')
if (length > strLen / 2) {
length = strLen / 2;
}
for (var i = 0; i < length; ++i) {
var parsed = parseInt(string.substr(i * 2, 2), 16);
if (isNaN(parsed)) return i
buf[offset + i] = parsed;
}
return i
}
function utf8Write (buf, string, offset, length) {
return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
}
function asciiWrite (buf, string, offset, length) {
return blitBuffer(asciiToBytes(string), buf, offset, length)
}
function latin1Write (buf, string, offset, length) {
return asciiWrite(buf, string, offset, length)
}
function base64Write (buf, string, offset, length) {
return blitBuffer(base64ToBytes(string), buf, offset, length)
}
function ucs2Write (buf, string, offset, length) {
return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
}
Buffer.prototype.write = function write (string, offset, length, encoding) {
// Buffer#write(string)
if (offset === undefined) {
encoding = 'utf8';
length = this.length;
offset = 0;
// Buffer#write(string, encoding)
} else if (length === undefined && typeof offset === 'string') {
encoding = offset;
length = this.length;
offset = 0;
// Buffer#write(string, offset[, length][, encoding])
} else if (isFinite(offset)) {
offset = offset | 0;
if (isFinite(length)) {
length = length | 0;
if (encoding === undefined) encoding = 'utf8';
} else {
encoding = length;
length = undefined;
}
// legacy write(string, encoding, offset, length) - remove in v0.13
} else {
throw new Error(
'Buffer.write(string, encoding, offset[, length]) is no longer supported'
)
}
var remaining = this.length - offset;
if (length === undefined || length > remaining) length = remaining;
if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
throw new RangeError('Attempt to write outside buffer bounds')
}
if (!encoding) encoding = 'utf8';
var loweredCase = false;
for (;;) {
switch (encoding) {
case 'hex':
return hexWrite(this, string, offset, length)
case 'utf8':
case 'utf-8':
return utf8Write(this, string, offset, length)
case 'ascii':
return asciiWrite(this, string, offset, length)
case 'latin1':
case 'binary':
return latin1Write(this, string, offset, length)
case 'base64':
// Warning: maxLength not taken into account in base64Write
return base64Write(this, string, offset, length)
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return ucs2Write(this, string, offset, length)
default:
if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
encoding = ('' + encoding).toLowerCase();
loweredCase = true;
}
}
};
Buffer.prototype.toJSON = function toJSON () {
return {
type: 'Buffer',
data: Array.prototype.slice.call(this._arr || this, 0)
}
};
function base64Slice (buf, start, end) {
if (start === 0 && end === buf.length) {
return fromByteArray(buf)
} else {
return fromByteArray(buf.slice(start, end))
}
}
function utf8Slice (buf, start, end) {
end = Math.min(buf.length, end);
var res = [];
var i = start;
while (i < end) {
var firstByte = buf[i];
var codePoint = null;
var bytesPerSequence = (firstByte > 0xEF) ? 4
: (firstByte > 0xDF) ? 3
: (firstByte > 0xBF) ? 2
: 1;
if (i + bytesPerSequence <= end) {
var secondByte, thirdByte, fourthByte, tempCodePoint;
switch (bytesPerSequence) {
case 1:
if (firstByte < 0x80) {
codePoint = firstByte;
}
break
case 2:
secondByte = buf[i + 1];
if ((secondByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F);
if (tempCodePoint > 0x7F) {
codePoint = tempCodePoint;
}
}
break
case 3:
secondByte = buf[i + 1];
thirdByte = buf[i + 2];
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F);
if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
codePoint = tempCodePoint;
}
}
break
case 4:
secondByte = buf[i + 1];
thirdByte = buf[i + 2];
fourthByte = buf[i + 3];
if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F);
if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
codePoint = tempCodePoint;
}
}
}
}
if (codePoint === null) {
// we did not generate a valid codePoint so insert a
// replacement char (U+FFFD) and advance only 1 byte
codePoint = 0xFFFD;
bytesPerSequence = 1;
} else if (codePoint > 0xFFFF) {
// encode to utf16 (surrogate pair dance)
codePoint -= 0x10000;
res.push(codePoint >>> 10 & 0x3FF | 0xD800);
codePoint = 0xDC00 | codePoint & 0x3FF;
}
res.push(codePoint);
i += bytesPerSequence;
}
return decodeCodePointsArray(res)
}
// Based on http://stackoverflow.com/a/22747272/680742, the browser with
// the lowest limit is Chrome, with 0x10000 args.
// We go 1 magnitude less, for safety
var MAX_ARGUMENTS_LENGTH = 0x1000;
function decodeCodePointsArray (codePoints) {
var len = codePoints.length;
if (len <= MAX_ARGUMENTS_LENGTH) {
return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
}
// Decode in chunks to avoid "call stack size exceeded".
var res = '';
var i = 0;
while (i < len) {
res += String.fromCharCode.apply(
String,
codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
);
}
return res
}
function asciiSlice (buf, start, end) {
var ret = '';
end = Math.min(buf.length, end);
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i] & 0x7F);
}
return ret
}
function latin1Slice (buf, start, end) {
var ret = '';
end = Math.min(buf.length, end);
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i]);
}
return ret
}
function hexSlice (buf, start, end) {
var len = buf.length;
if (!start || start < 0) start = 0;
if (!end || end < 0 || end > len) end = len;
var out = '';
for (var i = start; i < end; ++i) {
out += toHex(buf[i]);
}
return out
}
function utf16leSlice (buf, start, end) {
var bytes = buf.slice(start, end);
var res = '';
for (var i = 0; i < bytes.length; i += 2) {
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);
}
return res
}
Buffer.prototype.slice = function slice (start, end) {
var len = this.length;
start = ~~start;
end = end === undefined ? len : ~~end;
if (start < 0) {
start += len;
if (start < 0) start = 0;
} else if (start > len) {
start = len;
}
if (end < 0) {
end += len;
if (end < 0) end = 0;
} else if (end > len) {
end = len;
}
if (end < start) end = start;
var newBuf;
if (Buffer.TYPED_ARRAY_SUPPORT) {
newBuf = this.subarray(start, end);
newBuf.__proto__ = Buffer.prototype;
} else {
var sliceLen = end - start;
newBuf = new Buffer(sliceLen, undefined);
for (var i = 0; i < sliceLen; ++i) {
newBuf[i] = this[i + start];
}
}
return newBuf
};
/*
* Need to make sure that buffer isn't trying to write out of bounds.
*/
function checkOffset (offset, ext, length) {
if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
}
Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var val = this[offset];
var mul = 1;
var i = 0;
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul;
}
return val
};
Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) {
checkOffset(offset, byteLength, this.length);
}
var val = this[offset + --byteLength];
var mul = 1;
while (byteLength > 0 && (mul *= 0x100)) {
val += this[offset + --byteLength] * mul;
}
return val
};
Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
if (!noAssert) checkOffset(offset, 1, this.length);
return this[offset]
};
Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length);
return this[offset] | (this[offset + 1] << 8)
};
Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length);
return (this[offset] << 8) | this[offset + 1]
};
Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return ((this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16)) +
(this[offset + 3] * 0x1000000)
};
Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return (this[offset] * 0x1000000) +
((this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3])
};
Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var val = this[offset];
var mul = 1;
var i = 0;
while (++i < byteLength && (mul *= 0x100)) {
val += this[offset + i] * mul;
}
mul *= 0x80;
if (val >= mul) val -= Math.pow(2, 8 * byteLength);
return val
};
Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var i = byteLength;
var mul = 1;
var val = this[offset + --i];
while (i > 0 && (mul *= 0x100)) {
val += this[offset + --i] * mul;
}
mul *= 0x80;
if (val >= mul) val -= Math.pow(2, 8 * byteLength);
return val
};
Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
if (!noAssert) checkOffset(offset, 1, this.length);
if (!(this[offset] & 0x80)) return (this[offset])
return ((0xff - this[offset] + 1) * -1)
};
Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length);
var val = this[offset] | (this[offset + 1] << 8);
return (val & 0x8000) ? val | 0xFFFF0000 : val
};
Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 2, this.length);
var val = this[offset + 1] | (this[offset] << 8);
return (val & 0x8000) ? val | 0xFFFF0000 : val
};
Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return (this[offset]) |
(this[offset + 1] << 8) |
(this[offset + 2] << 16) |
(this[offset + 3] << 24)
};
Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return (this[offset] << 24) |
(this[offset + 1] << 16) |
(this[offset + 2] << 8) |
(this[offset + 3])
};
Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return read(this, offset, true, 23, 4)
};
Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 4, this.length);
return read(this, offset, false, 23, 4)
};
Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 8, this.length);
return read(this, offset, true, 52, 8)
};
Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
if (!noAssert) checkOffset(offset, 8, this.length);
return read(this, offset, false, 52, 8)
};
function checkInt (buf, value, offset, ext, max, min) {
if (!internalIsBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
if (offset + ext > buf.length) throw new RangeError('Index out of range')
}
Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
value = +value;
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1;
checkInt(this, value, offset, byteLength, maxBytes, 0);
}
var mul = 1;
var i = 0;
this[offset] = value & 0xFF;
while (++i < byteLength && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF;
}
return offset + byteLength
};
Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
value = +value;
offset = offset | 0;
byteLength = byteLength | 0;
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1;
checkInt(this, value, offset, byteLength, maxBytes, 0);
}
var i = byteLength - 1;
var mul = 1;
this[offset + i] = value & 0xFF;
while (--i >= 0 && (mul *= 0x100)) {
this[offset + i] = (value / mul) & 0xFF;
}
return offset + byteLength
};
Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0);
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);
this[offset] = (value & 0xff);
return offset + 1
};
function objectWriteUInt16 (buf, value, offset, littleEndian) {
if (value < 0) value = 0xffff + value + 1;
for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; ++i) {
buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
(littleEndian ? i : 1 - i) * 8;
}
}
Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff);
this[offset + 1] = (value >>> 8);
} else {
objectWriteUInt16(this, value, offset, true);
}
return offset + 2
};
Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 8);
this[offset + 1] = (value & 0xff);
} else {
objectWriteUInt16(this, value, offset, false);
}
return offset + 2
};
function objectWriteUInt32 (buf, value, offset, littleEndian) {
if (value < 0) value = 0xffffffff + value + 1;
for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; ++i) {
buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff;
}
}
Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset + 3] = (value >>> 24);
this[offset + 2] = (value >>> 16);
this[offset + 1] = (value >>> 8);
this[offset] = (value & 0xff);
} else {
objectWriteUInt32(this, value, offset, true);
}
return offset + 4
};
Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 24);
this[offset + 1] = (value >>> 16);
this[offset + 2] = (value >>> 8);
this[offset + 3] = (value & 0xff);
} else {
objectWriteUInt32(this, value, offset, false);
}
return offset + 4
};
Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1);
checkInt(this, value, offset, byteLength, limit - 1, -limit);
}
var i = 0;
var mul = 1;
var sub = 0;
this[offset] = value & 0xFF;
while (++i < byteLength && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
sub = 1;
}
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF;
}
return offset + byteLength
};
Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1);
checkInt(this, value, offset, byteLength, limit - 1, -limit);
}
var i = byteLength - 1;
var mul = 1;
var sub = 0;
this[offset + i] = value & 0xFF;
while (--i >= 0 && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
sub = 1;
}
this[offset + i] = ((value / mul) >> 0) - sub & 0xFF;
}
return offset + byteLength
};
Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80);
if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value);
if (value < 0) value = 0xff + value + 1;
this[offset] = (value & 0xff);
return offset + 1
};
Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff);
this[offset + 1] = (value >>> 8);
} else {
objectWriteUInt16(this, value, offset, true);
}
return offset + 2
};
Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 8);
this[offset + 1] = (value & 0xff);
} else {
objectWriteUInt16(this, value, offset, false);
}
return offset + 2
};
Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value & 0xff);
this[offset + 1] = (value >>> 8);
this[offset + 2] = (value >>> 16);
this[offset + 3] = (value >>> 24);
} else {
objectWriteUInt32(this, value, offset, true);
}
return offset + 4
};
Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
value = +value;
offset = offset | 0;
if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
if (value < 0) value = 0xffffffff + value + 1;
if (Buffer.TYPED_ARRAY_SUPPORT) {
this[offset] = (value >>> 24);
this[offset + 1] = (value >>> 16);
this[offset + 2] = (value >>> 8);
this[offset + 3] = (value & 0xff);
} else {
objectWriteUInt32(this, value, offset, false);
}
return offset + 4
};
function checkIEEE754 (buf, value, offset, ext, max, min) {
if (offset + ext > buf.length) throw new RangeError('Index out of range')
if (offset < 0) throw new RangeError('Index out of range')
}
function writeFloat (buf, value, offset, littleEndian, noAssert) {
if (!noAssert) {
checkIEEE754(buf, value, offset, 4);
}
write(buf, value, offset, littleEndian, 23, 4);
return offset + 4
}
Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
return writeFloat(this, value, offset, true, noAssert)
};
Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
return writeFloat(this, value, offset, false, noAssert)
};
function writeDouble (buf, value, offset, littleEndian, noAssert) {
if (!noAssert) {
checkIEEE754(buf, value, offset, 8);
}
write(buf, value, offset, littleEndian, 52, 8);
return offset + 8
}
Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
return writeDouble(this, value, offset, true, noAssert)
};
Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
return writeDouble(this, value, offset, false, noAssert)
};
// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
Buffer.prototype.copy = function copy (target, targetStart, start, end) {
if (!start) start = 0;
if (!end && end !== 0) end = this.length;
if (targetStart >= target.length) targetStart = target.length;
if (!targetStart) targetStart = 0;
if (end > 0 && end < start) end = start;
// Copy 0 bytes; we're done
if (end === start) return 0
if (target.length === 0 || this.length === 0) return 0
// Fatal error conditions
if (targetStart < 0) {
throw new RangeError('targetStart out of bounds')
}
if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
if (end < 0) throw new RangeError('sourceEnd out of bounds')
// Are we oob?
if (end > this.length) end = this.length;
if (target.length - targetStart < end - start) {
end = target.length - targetStart + start;
}
var len = end - start;
var i;
if (this === target && start < targetStart && targetStart < end) {
// descending copy from end
for (i = len - 1; i >= 0; --i) {
target[i + targetStart] = this[i + start];
}
} else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
// ascending copy from start
for (i = 0; i < len; ++i) {
target[i + targetStart] = this[i + start];
}
} else {
Uint8Array.prototype.set.call(
target,
this.subarray(start, start + len),
targetStart
);
}
return len
};
// Usage:
// buffer.fill(number[, offset[, end]])
// buffer.fill(buffer[, offset[, end]])
// buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill (val, start, end, encoding) {
// Handle string cases:
if (typeof val === 'string') {
if (typeof start === 'string') {
encoding = start;
start = 0;
end = this.length;
} else if (typeof end === 'string') {
encoding = end;
end = this.length;
}
if (val.length === 1) {
var code = val.charCodeAt(0);
if (code < 256) {
val = code;
}
}
if (encoding !== undefined && typeof encoding !== 'string') {
throw new TypeError('encoding must be a string')
}
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
throw new TypeError('Unknown encoding: ' + encoding)
}
} else if (typeof val === 'number') {
val = val & 255;
}
// Invalid ranges are not set to a default, so can range check early.
if (start < 0 || this.length < start || this.length < end) {
throw new RangeError('Out of range index')
}
if (end <= start) {
return this
}
start = start >>> 0;
end = end === undefined ? this.length : end >>> 0;
if (!val) val = 0;
var i;
if (typeof val === 'number') {
for (i = start; i < end; ++i) {
this[i] = val;
}
} else {
var bytes = internalIsBuffer(val)
? val
: utf8ToBytes(new Buffer(val, encoding).toString());
var len = bytes.length;
for (i = 0; i < end - start; ++i) {
this[i + start] = bytes[i % len];
}
}
return this
};
// HELPER FUNCTIONS
// ================
var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g;
function base64clean (str) {
// Node strips out invalid characters like \n and \t from the string, base64-js does not
str = stringtrim(str).replace(INVALID_BASE64_RE, '');
// Node converts strings with length < 2 to ''
if (str.length < 2) return ''
// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
while (str.length % 4 !== 0) {
str = str + '=';
}
return str
}
function stringtrim (str) {
if (str.trim) return str.trim()
return str.replace(/^\s+|\s+$/g, '')
}
function toHex (n) {
if (n < 16) return '0' + n.toString(16)
return n.toString(16)
}
function utf8ToBytes (string, units) {
units = units || Infinity;
var codePoint;
var length = string.length;
var leadSurrogate = null;
var bytes = [];
for (var i = 0; i < length; ++i) {
codePoint = string.charCodeAt(i);
// is surrogate component
if (codePoint > 0xD7FF && codePoint < 0xE000) {
// last char was a lead
if (!leadSurrogate) {
// no lead yet
if (codePoint > 0xDBFF) {
// unexpected trail
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
continue
} else if (i + 1 === length) {
// unpaired lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
continue
}
// valid lead
leadSurrogate = codePoint;
continue
}
// 2 leads in a row
if (codePoint < 0xDC00) {
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
leadSurrogate = codePoint;
continue
}
// valid surrogate pair
codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000;
} else if (leadSurrogate) {
// valid bmp char, but last char was a lead
if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD);
}
leadSurrogate = null;
// encode utf8
if (codePoint < 0x80) {
if ((units -= 1) < 0) break
bytes.push(codePoint);
} else if (codePoint < 0x800) {
if ((units -= 2) < 0) break
bytes.push(
codePoint >> 0x6 | 0xC0,
codePoint & 0x3F | 0x80
);
} else if (codePoint < 0x10000) {
if ((units -= 3) < 0) break
bytes.push(
codePoint >> 0xC | 0xE0,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
);
} else if (codePoint < 0x110000) {
if ((units -= 4) < 0) break
bytes.push(
codePoint >> 0x12 | 0xF0,
codePoint >> 0xC & 0x3F | 0x80,
codePoint >> 0x6 & 0x3F | 0x80,
codePoint & 0x3F | 0x80
);
} else {
throw new Error('Invalid code point')
}
}
return bytes
}
function asciiToBytes (str) {
var byteArray = [];
for (var i = 0; i < str.length; ++i) {
// Node's code seems to be doing this and not & 0x7F..
byteArray.push(str.charCodeAt(i) & 0xFF);
}
return byteArray
}
function utf16leToBytes (str, units) {
var c, hi, lo;
var byteArray = [];
for (var i = 0; i < str.length; ++i) {
if ((units -= 2) < 0) break
c = str.charCodeAt(i);
hi = c >> 8;
lo = c % 256;
byteArray.push(lo);
byteArray.push(hi);
}
return byteArray
}
function base64ToBytes (str) {
return toByteArray(base64clean(str))
}
function blitBuffer (src, dst, offset, length) {
for (var i = 0; i < length; ++i) {
if ((i + offset >= dst.length) || (i >= src.length)) break
dst[i + offset] = src[i];
}
return i
}
function isnan (val) {
return val !== val // eslint-disable-line no-self-compare
}
// the following is from is-buffer, also by Feross Aboukhadijeh and with same lisence
// The _isBuffer check is for Safari 5-7 support, because it's missing
// Object.prototype.constructor. Remove this eventually
function isBuffer(obj) {
return obj != null && (!!obj._isBuffer || isFastBuffer(obj) || isSlowBuffer(obj))
}
function isFastBuffer (obj) {
return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}
// For Node v0.10 support. Remove this eventually.
function isSlowBuffer (obj) {
return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isFastBuffer(obj.slice(0, 0))
}
class CsvError extends Error {
constructor(code, message, options, ...contexts) {
if(Array.isArray(message)) message = message.join(' ').trim();
super(message);
if(Error.captureStackTrace !== undefined){
Error.captureStackTrace(this, CsvError);
}
this.code = code;
for(const context of contexts){
for(const key in context){
const value = context[key];
this[key] = isBuffer(value) ? value.toString(options.encoding) : value == null ? value : JSON.parse(JSON.stringify(value));
}
}
}
}
const is_object = function(obj){
return (typeof obj === 'object' && obj !== null && !Array.isArray(obj));
};
const normalize_columns_array = function(columns){
const normalizedColumns = [];
for(let i = 0, l = columns.length; i < l; i++){
const column = columns[i];
if(column === undefined || column === null || column === false){
normalizedColumns[i] = { disabled: true };
}else if(typeof column === 'string'){
normalizedColumns[i] = { name: column };
}else if(is_object(column)){
if(typeof column.name !== 'string'){
throw new CsvError('CSV_OPTION_COLUMNS_MISSING_NAME', [
'Option columns missing name:',
`property "name" is required at position ${i}`,
'when column is an object literal'
]);
}
normalizedColumns[i] = column;
}else {
throw new CsvError('CSV_INVALID_COLUMN_DEFINITION', [
'Invalid column definition:',
'expect a string or a literal object,',
`got ${JSON.stringify(column)} at position ${i}`
]);
}
}
return normalizedColumns;
};
class ResizeableBuffer{
constructor(size=100){
this.size = size;
this.length = 0;
this.buf = Buffer.allocUnsafe(size);
}
prepend(val){
if(isBuffer(val)){
const length = this.length + val.length;
if(length >= this.size){
this.resize();
if(length >= this.size){
throw Error('INVALID_BUFFER_STATE');
}
}
const buf = this.buf;
this.buf = Buffer.allocUnsafe(this.size);
val.copy(this.buf, 0);
buf.copy(this.buf, val.length);
this.length += val.length;
}else {
const length = this.length++;
if(length === this.size){
this.resize();
}
const buf = this.clone();
this.buf[0] = val;
buf.copy(this.buf,1, 0, length);
}
}
append(val){
const length = this.length++;
if(length === this.size){
this.resize();
}
this.buf[length] = val;
}
clone(){
return Buffer.from(this.buf.slice(0, this.length));
}
resize(){
const length = this.length;
this.size = this.size * 2;
const buf = Buffer.allocUnsafe(this.size);
this.buf.copy(buf,0, 0, length);
this.buf = buf;
}
toString(encoding){
if(encoding){
return this.buf.slice(0, this.length).toString(encoding);
}else {
return Uint8Array.prototype.slice.call(this.buf.slice(0, this.length));
}
}
toJSON(){
return this.toString('utf8');
}
reset(){
this.length = 0;
}
}
// white space characters
// https://en.wikipedia.org/wiki/Whitespace_character
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions/Character_Classes#Types
// \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff
const np = 12;
const cr$1 = 13; // `\r`, carriage return, 0x0D in hexadécimal, 13 in decimal
const nl$1 = 10; // `\n`, newline, 0x0A in hexadecimal, 10 in decimal
const space = 32;
const tab = 9;
const init_state = function(options){
return {
bomSkipped: false,
bufBytesStart: 0,
castField: options.cast_function,
commenting: false,
// Current error encountered by a record
error: undefined,
enabled: options.from_line === 1,
escaping: false,
escapeIsQuote: isBuffer(options.escape) && isBuffer(options.quote) && Buffer.compare(options.escape, options.quote) === 0,
// columns can be `false`, `true`, `Array`
expectedRecordLength: Array.isArray(options.columns) ? options.columns.length : undefined,
field: new ResizeableBuffer(20),
firstLineToHeaders: options.cast_first_line_to_header,
needMoreDataSize: Math.max(
// Skip if the remaining buffer smaller than comment
options.comment !== null ? options.comment.length : 0,
// Skip if the remaining buffer can be delimiter
...options.delimiter.map((delimiter) => delimiter.length),
// Skip if the remaining buffer can be escape sequence
options.quote !== null ? options.quote.length : 0,
),
previousBuf: undefined,
quoting: false,
stop: false,
rawBuffer: new ResizeableBuffer(100),
record: [],
recordHasError: false,
record_length: 0,
recordDelimiterMaxLength: options.record_delimiter.length === 0 ? 0 : Math.max(...options.record_delimiter.map((v) => v.length)),
trimChars: [Buffer.from(' ', options.encoding)[0], Buffer.from('\t', options.encoding)[0]],
wasQuoting: false,
wasRowDelimiter: false,
timchars: [
Buffer.from(Buffer.from([cr$1], 'utf8').toString(), options.encoding),
Buffer.from(Buffer.from([nl$1], 'utf8').toString(), options.encoding),
Buffer.from(Buffer.from([np], 'utf8').toString(), options.encoding),
Buffer.from(Buffer.from([space], 'utf8').toString(), options.encoding),
Buffer.from(Buffer.from([tab], 'utf8').toString(), options.encoding),
]
};
};
const underscore = function(str){
return str.replace(/([A-Z])/g, function(_, match){
return '_' + match.toLowerCase();
});
};
const normalize_options = function(opts){
const options = {};
// Merge with user options
for(const opt in opts){
options[underscore(opt)] = opts[opt];
}
// Normalize option `encoding`
// Note: defined first because other options depends on it
// to convert chars/strings into buffers.
if(options.encoding === undefined || options.encoding === true){
options.encoding = 'utf8';
}else if(options.encoding === null || options.encoding === false){
options.encoding = null;
}else if(typeof options.encoding !== 'string' && options.encoding !== null){
throw new CsvError('CSV_INVALID_OPTION_ENCODING', [
'Invalid option encoding:',
'encoding must be a string or null to return a buffer,',
`got ${JSON.stringify(options.encoding)}`
], options);
}
// Normalize option `bom`
if(options.bom === undefined || options.bom === null || options.bom === false){
options.bom = false;
}else if(options.bom !== true){
throw new CsvError('CSV_INVALID_OPTION_BOM', [
'Invalid option bom:', 'bom must be true,',
`got ${JSON.stringify(options.bom)}`
], options);
}
// Normalize option `cast`
options.cast_function = null;
if(options.cast === undefined || options.cast === null || options.cast === false || options.cast === ''){
options.cast = undefined;
}else if(typeof options.cast === 'function'){
options.cast_function = options.cast;
options.cast = true;
}else if(options.cast !== true){
throw new CsvError('CSV_INVALID_OPTION_CAST', [
'Invalid option cast:', 'cast must be true or a function,',
`got ${JSON.stringify(options.cast)}`
], options);
}
// Normalize option `cast_date`
if(options.cast_date === undefined || options.cast_date === null || options.cast_date === false || options.cast_date === ''){
options.cast_date = false;
}else if(options.cast_date === true){
options.cast_date = function(value){
const date = Date.parse(value);
return !isNaN(date) ? new Date(date) : value;
};
}else if (typeof options.cast_date !== 'function'){
throw new CsvError('CSV_INVALID_OPTION_CAST_DATE', [
'Invalid option cast_date:', 'cast_date must be true or a function,',
`got ${JSON.stringify(options.cast_date)}`
], options);
}
// Normalize option `columns`
options.cast_first_line_to_header = null;
if(options.columns === true){
// Fields in the first line are converted as-is to columns
options.cast_first_line_to_header = undefined;
}else if(typeof options.columns === 'function'){
options.cast_first_line_to_header = options.columns;
options.columns = true;
}else if(Array.isArray(options.columns)){
options.columns = normalize_columns_array(options.columns);
}else if(options.columns === undefined || options.columns === null || options.columns === false){
options.columns = false;
}else {
throw new CsvError('CSV_INVALID_OPTION_COLUMNS', [
'Invalid option columns:',
'expect an array, a function or true,',
`got ${JSON.stringify(options.columns)}`
], options);
}
// Normalize option `group_columns_by_name`
if(options.group_columns_by_name === undefined || options.group_columns_by_name === null || options.group_columns_by_name === false){
options.group_columns_by_name = false;
}else if(options.group_columns_by_name !== true){
throw new CsvError('CSV_INVALID_OPTION_GROUP_COLUMNS_BY_NAME', [
'Invalid option group_columns_by_name:',
'expect an boolean,',
`got ${JSON.stringify(options.group_columns_by_name)}`
], options);
}else if(options.columns === false){
throw new CsvError('CSV_INVALID_OPTION_GROUP_COLUMNS_BY_NAME', [
'Invalid option group_columns_by_name:',
'the `columns` mode must be activated.'
], options);
}
// Normalize option `comment`
if(options.comment === undefined || options.comment === null || options.comment === false || options.comment === ''){
options.comment = null;
}else {
if(typeof options.comment === 'string'){
options.comment = Buffer.from(options.comment, options.encoding);
}
if(!isBuffer(options.comment)){
throw new CsvError('CSV_INVALID_OPTION_COMMENT', [
'Invalid option comment:',
'comment must be a buffer or a string,',
`got ${JSON.stringify(options.comment)}`
], options);
}
}
// Normalize option `comment_no_infix`
if(options.comment_no_infix === undefined || options.comment_no_infix === null || options.comment_no_infix === false){
options.comment_no_infix = false;
}else if(options.comment_no_infix !== true){
throw new CsvError('CSV_INVALID_OPTION_COMMENT', [
'Invalid option comment_no_infix:',
'value must be a boolean,',
`got ${JSON.stringify(options.comment_no_infix)}`
], options);
}
// Normalize option `delimiter`
const delimiter_json = JSON.stringify(options.delimiter);
if(!Array.isArray(options.delimiter)) options.delimiter = [options.delimiter];
if(options.delimiter.length === 0){
throw new CsvError('CSV_INVALID_OPTION_DELIMITER', [
'Invalid option delimiter:',
'delimiter must be a non empty string or buffer or array of string|buffer,',
`got ${delimiter_json}`
], options);
}
options.delimiter = options.delimiter.map(function(delimiter){
if(delimiter === undefined || delimiter === null || delimiter === false){
return Buffer.from(',', options.encoding);
}
if(typeof delimiter === 'string'){
delimiter = Buffer.from(delimiter, options.encoding);
}
if(!isBuffer(delimiter) || delimiter.length === 0){
throw new CsvError('CSV_INVALID_OPTION_DELIMITER', [
'Invalid option delimiter:',
'delimiter must be a non empty string or buffer or array of string|buffer,',
`got ${delimiter_json}`
], options);
}
return delimiter;
});
// Normalize option `escape`
if(options.escape === undefined || options.escape === true){
options.escape = Buffer.from('"', options.encoding);
}else if(typeof options.escape === 'string'){
options.escape = Buffer.from(options.escape, options.encoding);
}else if (options.escape === null || options.escape === false){
options.escape = null;
}
if(options.escape !== null){
if(!isBuffer(options.escape)){
throw new Error(`Invalid Option: escape must be a buffer, a string or a boolean, got ${JSON.stringify(options.escape)}`);
}
}
// Normalize option `from`
if(options.from === undefined || options.from === null){
options.from = 1;
}else {
if(typeof options.from === 'string' && /\d+/.test(options.from)){
options.from = parseInt(options.from);
}
if(Number.isInteger(options.from)){
if(options.from < 0){
throw new Error(`Invalid Option: from must be a positive integer, got ${JSON.stringify(opts.from)}`);
}
}else {
throw new Error(`Invalid Option: from must be an integer, got ${JSON.stringify(options.from)}`);
}
}
// Normalize option `from_line`
if(options.from_line === undefined || options.from_line === null){
options.from_line = 1;
}else {
if(typeof options.from_line === 'string' && /\d+/.test(options.from_line)){
options.from_line = parseInt(options.from_line);
}
if(Number.isInteger(options.from_line)){
if(options.from_line <= 0){
throw new Error(`Invalid Option: from_line must be a positive integer greater than 0, got ${JSON.stringify(opts.from_line)}`);
}
}else {
throw new Error(`Invalid Option: from_line must be an integer, got ${JSON.stringify(opts.from_line)}`);
}
}
// Normalize options `ignore_last_delimiters`
if(options.ignore_last_delimiters === undefined || options.ignore_last_delimiters === null){
options.ignore_last_delimiters = false;
}else if(typeof options.ignore_last_delimiters === 'number'){
options.ignore_last_delimiters = Math.floor(options.ignore_last_delimiters);
if(options.ignore_last_delimiters === 0){
options.ignore_last_delimiters = false;
}
}else if(typeof options.ignore_last_delimiters !== 'boolean'){
throw new CsvError('CSV_INVALID_OPTION_IGNORE_LAST_DELIMITERS', [
'Invalid option `ignore_last_delimiters`:',
'the value must be a boolean value or an integer,',
`got ${JSON.stringify(options.ignore_last_delimiters)}`
], options);
}
if(options.ignore_last_delimiters === true && options.columns === false){
throw new CsvError('CSV_IGNORE_LAST_DELIMITERS_REQUIRES_COLUMNS', [
'The option `ignore_last_delimiters`',
'requires the activation of the `columns` option'
], options);
}
// Normalize option `info`
if(options.info === undefined || options.info === null || options.info === false){
options.info = false;
}else if(options.info !== true){
throw new Error(`Invalid Option: info must be true, got ${JSON.stringify(options.info)}`);
}
// Normalize option `max_record_size`
if(options.max_record_size === undefined || options.max_record_size === null || options.max_record_size === false){
options.max_record_size = 0;
}else if(Number.isInteger(options.max_record_size) && options.max_record_size >= 0);else if(typeof options.max_record_size === 'string' && /\d+/.test(options.max_record_size)){
options.max_record_size = parseInt(options.max_record_size);
}else {
throw new Error(`Invalid Option: max_record_size must be a positive integer, got ${JSON.stringify(options.max_record_size)}`);
}
// Normalize option `objname`
if(options.objname === undefined || options.objname === null || options.objname === false){
options.objname = undefined;
}else if(isBuffer(options.objname)){
if(options.objname.length === 0){
throw new Error(`Invalid Option: objname must be a non empty buffer`);
}
if(options.encoding === null);else {
options.objname = options.objname.toString(options.encoding);
}
}else if(typeof options.objname === 'string'){
if(options.objname.length === 0){
throw new Error(`Invalid Option: objname must be a non empty string`);
}
// Great, nothing to do
}else if(typeof options.objname === 'number');else {
throw new Error(`Invalid Option: objname must be a string or a buffer, got ${options.objname}`);
}
if(options.objname !== undefined){
if(typeof options.objname === 'number'){
if(options.columns !== false){
throw Error('Invalid Option: objname index cannot be combined with columns or be defined as a field');
}
}else { // A string or a buffer
if(options.columns === false){
throw Error('Invalid Option: objname field must be combined with columns or be defined as an index');
}
}
}
// Normalize option `on_record`
if(options.on_record === undefined || options.on_record === null){
options.on_record = undefined;
}else if(typeof options.on_record !== 'function'){
throw new CsvError('CSV_INVALID_OPTION_ON_RECORD', [
'Invalid option `on_record`:',
'expect a function,',
`got ${JSON.stringify(options.on_record)}`
], options);
}
// Normalize option `quote`
if(options.quote === null || options.quote === false || options.quote === ''){
options.quote = null;
}else {
if(options.quote === undefined || options.quote === true){
options.quote = Buffer.from('"', options.encoding);
}else if(typeof options.quote === 'string'){
options.quote = Buffer.from(options.quote, options.encoding);
}
if(!isBuffer(options.quote)){
throw new Error(`Invalid Option: quote must be a buffer or a string, got ${JSON.stringify(options.quote)}`);
}
}
// Normalize option `raw`
if(options.raw === undefined || options.raw === null || options.raw === false){
options.raw = false;
}else if(options.raw !== true){
throw new Error(`Invalid Option: raw must be true, got ${JSON.stringify(options.raw)}`);
}
// Normalize option `record_delimiter`
if(options.record_delimiter === undefined){
options.record_delimiter = [];
}else if(typeof options.record_delimiter === 'string' || isBuffer(options.record_delimiter)){
if(options.record_delimiter.length === 0){
throw new CsvError('CSV_INVALID_OPTION_RECORD_DELIMITER', [
'Invalid option `record_delimiter`:',
'value must be a non empty string or buffer,',
`got ${JSON.stringify(options.record_delimiter)}`
], options);
}
options.record_delimiter = [options.record_delimiter];
}else if(!Array.isArray(options.record_delimiter)){
throw new CsvError('CSV_INVALID_OPTION_RECORD_DELIMITER', [
'Invalid option `record_delimiter`:',
'value must be a string, a buffer or array of string|buffer,',
`got ${JSON.stringify(options.record_delimiter)}`
], options);
}
options.record_delimiter = options.record_delimiter.map(function(rd, i){
if(typeof rd !== 'string' && ! isBuffer(rd)){
throw new CsvError('CSV_INVALID_OPTION_RECORD_DELIMITER', [
'Invalid option `record_delimiter`:',
'value must be a string, a buffer or array of string|buffer',
`at index ${i},`,
`got ${JSON.stringify(rd)}`
], options);
}else if(rd.length === 0){
throw new CsvError('CSV_INVALID_OPTION_RECORD_DELIMITER', [
'Invalid option `record_delimiter`:',
'value must be a non empty string or buffer',
`at index ${i},`,
`got ${JSON.stringify(rd)}`
], options);
}
if(typeof rd === 'string'){
rd = Buffer.from(rd, options.encoding);
}
return rd;
});
// Normalize option `relax_column_count`
if(typeof options.relax_column_count === 'boolean');else if(options.relax_column_count === undefined || options.relax_column_count === null){
options.relax_column_count = false;
}else {
throw new Error(`Invalid Option: relax_column_count must be a boolean, got ${JSON.stringify(options.relax_column_count)}`);
}
if(typeof options.relax_column_count_less === 'boolean');else if(options.relax_column_count_less === undefined || options.relax_column_count_less === null){
options.relax_column_count_less = false;
}else {
throw new Error(`Invalid Option: relax_column_count_less must be a boolean, got ${JSON.stringify(options.relax_column_count_less)}`);
}
if(typeof options.relax_column_count_more === 'boolean');else if(options.relax_column_count_more === undefined || options.relax_column_count_more === null){
options.relax_column_count_more = false;
}else {
throw new Error(`Invalid Option: relax_column_count_more must be a boolean, got ${JSON.stringify(options.relax_column_count_more)}`);
}
// Normalize option `relax_quotes`
if(typeof options.relax_quotes === 'boolean');else if(options.relax_quotes === undefined || options.relax_quotes === null){
options.relax_quotes = false;
}else {
throw new Error(`Invalid Option: relax_quotes must be a boolean, got ${JSON.stringify(options.relax_quotes)}`);
}
// Normalize option `skip_empty_lines`
if(typeof options.skip_empty_lines === 'boolean');else if(options.skip_empty_lines === undefined || options.skip_empty_lines === null){
options.skip_empty_lines = false;
}else {
throw new Error(`Invalid Option: skip_empty_lines must be a boolean, got ${JSON.stringify(options.skip_empty_lines)}`);
}
// Normalize option `skip_records_with_empty_values`
if(typeof options.skip_records_with_empty_values === 'boolean');else if(options.skip_records_with_empty_values === undefined || options.skip_records_with_empty_values === null){
options.skip_records_with_empty_values = false;
}else {
throw new Error(`Invalid Option: skip_records_with_empty_values must be a boolean, got ${JSON.stringify(options.skip_records_with_empty_values)}`);
}
// Normalize option `skip_records_with_error`
if(typeof options.skip_records_with_error === 'boolean');else if(options.skip_records_with_error === undefined || options.skip_records_with_error === null){
options.skip_records_with_error = false;
}else {
throw new Error(`Invalid Option: skip_records_with_error must be a boolean, got ${JSON.stringify(options.skip_records_with_error)}`);
}
// Normalize option `rtrim`
if(options.rtrim === undefined || options.rtrim === null || options.rtrim === false){
options.rtrim = false;
}else if(options.rtrim !== true){
throw new Error(`Invalid Option: rtrim must be a boolean, got ${JSON.stringify(options.rtrim)}`);
}
// Normalize option `ltrim`
if(options.ltrim === undefined || options.ltrim === null || options.ltrim === false){
options.ltrim = false;
}else if(options.ltrim !== true){
throw new Error(`Invalid Option: ltrim must be a boolean, got ${JSON.stringify(options.ltrim)}`);
}
// Normalize option `trim`
if(options.trim === undefined || options.trim === null || options.trim === false){
options.trim = false;
}else if(options.trim !== true){
throw new Error(`Invalid Option: trim must be a boolean, got ${JSON.stringify(options.trim)}`);
}
// Normalize options `trim`, `ltrim` and `rtrim`
if(options.trim === true && opts.ltrim !== false){
options.ltrim = true;
}else if(options.ltrim !== true){
options.ltrim = false;
}
if(options.trim === true && opts.rtrim !== false){
options.rtrim = true;
}else if(options.rtrim !== true){
options.rtrim = false;
}
// Normalize option `to`
if(options.to === undefined || options.to === null){
options.to = -1;
}else {
if(typeof options.to === 'string' && /\d+/.test(options.to)){
options.to = parseInt(options.to);
}
if(Number.isInteger(options.to)){
if(options.to <= 0){
throw new Error(`Invalid Option: to must be a positive integer greater than 0, got ${JSON.stringify(opts.to)}`);
}
}else {
throw new Error(`Invalid Option: to must be an integer, got ${JSON.stringify(opts.to)}`);
}
}
// Normalize option `to_line`
if(options.to_line === undefined || options.to_line === null){
options.to_line = -1;
}else {
if(typeof options.to_line === 'string' && /\d+/.test(options.to_line)){
options.to_line = parseInt(options.to_line);
}
if(Number.isInteger(options.to_line)){
if(options.to_line <= 0){
throw new Error(`Invalid Option: to_line must be a positive integer greater than 0, got ${JSON.stringify(opts.to_line)}`);
}
}else {
throw new Error(`Invalid Option: to_line must be an integer, got ${JSON.stringify(opts.to_line)}`);
}
}
return options;
};
const isRecordEmpty = function(record){
return record.every((field) => field == null || field.toString && field.toString().trim() === '');
};
const cr = 13; // `\r`, carriage return, 0x0D in hexadécimal, 13 in decimal
const nl = 10; // `\n`, newline, 0x0A in hexadecimal, 10 in decimal
const boms = {
// Note, the following are equals:
// Buffer.from("\ufeff")
// Buffer.from([239, 187, 191])
// Buffer.from('EFBBBF', 'hex')
'utf8': Buffer.from([239, 187, 191]),
// Note, the following are equals:
// Buffer.from "\ufeff", 'utf16le
// Buffer.from([255, 254])
'utf16le': Buffer.from([255, 254])
};
const transform = function(original_options = {}) {
const info = {
bytes: 0,
comment_lines: 0,
empty_lines: 0,
invalid_field_length: 0,
lines: 1,
records: 0
};
const options = normalize_options(original_options);
return {
info: info,
original_options: original_options,
options: options,
state: init_state(options),
__needMoreData: function(i, bufLen, end){
if(end) return false;
const {encoding, escape, quote} = this.options;
const {quoting, needMoreDataSize, recordDelimiterMaxLength} = this.state;
const numOfCharLeft = bufLen - i - 1;
const requiredLength = Math.max(
needMoreDataSize,
// Skip if the remaining buffer smaller than record delimiter
// If "record_delimiter" is yet to be discovered:
// 1. It is equals to `[]` and "recordDelimiterMaxLength" equals `0`
// 2. We set the length to windows line ending in the current encoding
// Note, that encoding is known from user or bom discovery at that point
// recordDelimiterMaxLength,
recordDelimiterMaxLength === 0 ? Buffer.from('\r\n', encoding).length : recordDelimiterMaxLength,
// Skip if remaining buffer can be an escaped quote
quoting ? ((escape === null ? 0 : escape.length) + quote.length) : 0,
// Skip if remaining buffer can be record delimiter following the closing quote
quoting ? (quote.length + recordDelimiterMaxLength) : 0,
);
return numOfCharLeft < requiredLength;
},
// Central parser implementation
parse: function(nextBuf, end, push, close){
const {bom, comment_no_infix, encoding, from_line, ltrim, max_record_size,raw, relax_quotes, rtrim, skip_empty_lines, to, to_line} = this.options;
let {comment, escape, quote, record_delimiter} = this.options;
const {bomSkipped, previousBuf, rawBuffer, escapeIsQuote} = this.state;
let buf;
if(previousBuf === undefined){
if(nextBuf === undefined){
// Handle empty string
close();
return;
}else {
buf = nextBuf;
}
}else if(previousBuf !== undefined && nextBuf === undefined){
buf = previousBuf;
}else {
buf = Buffer.concat([previousBuf, nextBuf]);
}
// Handle UTF BOM
if(bomSkipped === false){
if(bom === false){
this.state.bomSkipped = true;
}else if(buf.length < 3){
// No enough data
if(end === false){
// Wait for more data
this.state.previousBuf = buf;
return;
}
}else {
for(const encoding in boms){
if(boms[encoding].compare(buf, 0, boms[encoding].length) === 0){
// Skip BOM
const bomLength = boms[encoding].length;
this.state.bufBytesStart += bomLength;
buf = buf.slice(bomLength);
// Renormalize original options with the new encoding
this.options = normalize_options({...this.original_options, encoding: encoding});
// Options will re-evaluate the Buffer with the new encoding
({comment, escape, quote } = this.options);
break;
}
}
this.state.bomSkipped = true;
}
}
const bufLen = buf.length;
let pos;
for(pos = 0; pos < bufLen; pos++){
// Ensure we get enough space to look ahead
// There should be a way to move this out of the loop
if(this.__needMoreData(pos, bufLen, end)){
break;
}
if(this.state.wasRowDelimiter === true){
this.info.lines++;
this.state.wasRowDelimiter = false;
}
if(to_line !== -1 && this.info.lines > to_line){
this.state.stop = true;
close();
return;
}
// Auto discovery of record_delimiter, unix, mac and windows supported
if(this.state.quoting === false && record_delimiter.length === 0){
const record_delimiterCount = this.__autoDiscoverRecordDelimiter(buf, pos);
if(record_delimiterCount){
record_delimiter = this.options.record_delimiter;
}
}
const chr = buf[pos];
if(raw === true){
rawBuffer.append(chr);
}
if((chr === cr || chr === nl) && this.state.wasRowDelimiter === false){
this.state.wasRowDelimiter = true;
}
// Previous char was a valid escape char
// treat the current char as a regular char
if(this.state.escaping === true){
this.state.escaping = false;
}else {
// Escape is only active inside quoted fields
// We are quoting, the char is an escape chr and there is a chr to escape
// if(escape !== null && this.state.quoting === true && chr === escape && pos + 1 < bufLen){
if(escape !== null && this.state.quoting === true && this.__isEscape(buf, pos, chr) && pos + escape.length < bufLen){
if(escapeIsQuote){
if(this.__isQuote(buf, pos+escape.length)){
this.state.escaping = true;
pos += escape.length - 1;
continue;
}
}else {
this.state.escaping = true;
pos += escape.length - 1;
continue;
}
}
// Not currently escaping and chr is a quote
// TODO: need to compare bytes instead of single char
if(this.state.commenting === false && this.__isQuote(buf, pos)){
if(this.state.quoting === true){
const nextChr = buf[pos+quote.length];
const isNextChrTrimable = rtrim && this.__isCharTrimable(buf, pos+quote.length);
const isNextChrComment = comment !== null && this.__compareBytes(comment, buf, pos+quote.length, nextChr);
const isNextChrDelimiter = this.__isDelimiter(buf, pos+quote.length, nextChr);
const isNextChrRecordDelimiter = record_delimiter.length === 0 ? this.__autoDiscoverRecordDelimiter(buf, pos+quote.length) : this.__isRecordDelimiter(nextChr, buf, pos+quote.length);
// Escape a quote
// Treat next char as a regular character
if(escape !== null && this.__isEscape(buf, pos, chr) && this.__isQuote(buf, pos + escape.length)){
pos += escape.length - 1;
}else if(!nextChr || isNextChrDelimiter || isNextChrRecordDelimiter || isNextChrComment || isNextChrTrimable){
this.state.quoting = false;
this.state.wasQuoting = true;
pos += quote.length - 1;
continue;
}else if(relax_quotes === false){
const err = this.__error(
new CsvError('CSV_INVALID_CLOSING_QUOTE', [
'Invalid Closing Quote:',
`got "${String.fromCharCode(nextChr)}"`,
`at line ${this.info.lines}`,
'instead of delimiter, record delimiter, trimable character',
'(if activated) or comment',
], this.options, this.__infoField())
);
if(err !== undefined) return err;
}else {
this.state.quoting = false;
this.state.wasQuoting = true;
this.state.field.prepend(quote);
pos += quote.length - 1;
}
}else {
if(this.state.field.length !== 0){
// In relax_quotes mode, treat opening quote preceded by chrs as regular
if(relax_quotes === false){
const info = this.__infoField();
const bom = Object.keys(boms).map(b => boms[b].equals(this.state.field.toString()) ? b : false).filter(Boolean)[0];
const err = this.__error(
new CsvError('INVALID_OPENING_QUOTE', [
'Invalid Opening Quote:',
`a quote is found on field ${JSON.stringify(info.column)} at line ${info.lines}, value is ${JSON.stringify(this.state.field.toString(encoding))}`,
bom ? `(${bom} bom)` : undefined
], this.options, info, {
field: this.state.field,
})
);
if(err !== undefined) return err;
}
}else {
this.state.quoting = true;
pos += quote.length - 1;
continue;
}
}
}
if(this.state.quoting === false){
const recordDelimiterLength = this.__isRecordDelimiter(chr, buf, pos);
if(recordDelimiterLength !== 0){
// Do not emit comments which take a full line
const skipCommentLine = this.state.commenting && (this.state.wasQuoting === false && this.state.record.length === 0 && this.state.field.length === 0);
if(skipCommentLine){
this.info.comment_lines++;
// Skip full comment line
}else {
// Activate records emition if above from_line
if(this.state.enabled === false && this.info.lines + (this.state.wasRowDelimiter === true ? 1: 0) >= from_line){
this.state.enabled = true;
this.__resetField();
this.__resetRecord();
pos += recordDelimiterLength - 1;
continue;
}
// Skip if line is empty and skip_empty_lines activated
if(skip_empty_lines === true && this.state.wasQuoting === false && this.state.record.length === 0 && this.state.field.length === 0){
this.info.empty_lines++;
pos += recordDelimiterLength - 1;
continue;
}
this.info.bytes = this.state.bufBytesStart + pos;
const errField = this.__onField();
if(errField !== undefined) return errField;
this.info.bytes = this.state.bufBytesStart + pos + recordDelimiterLength;
const errRecord = this.__onRecord(push);
if(errRecord !== undefined) return errRecord;
if(to !== -1 && this.info.records >= to){
this.state.stop = true;
close();
return;
}
}
this.state.commenting = false;
pos += recordDelimiterLength - 1;
continue;
}
if(this.state.commenting){
continue;
}
const commentCount = comment === null ? 0 : this.__compareBytes(comment, buf, pos, chr);
if(commentCount !== 0 && (comment_no_infix === false || this.state.field.length === 0)){
this.state.commenting = true;
continue;
}
const delimiterLength = this.__isDelimiter(buf, pos, chr);
if(delimiterLength !== 0){
this.info.bytes = this.state.bufBytesStart + pos;
const errField = this.__onField();
if(errField !== undefined) return errField;
pos += delimiterLength - 1;
continue;
}
}
}
if(this.state.commenting === false){
if(max_record_size !== 0 && this.state.record_length + this.state.field.length > max_record_size){
return this.__error(
new CsvError('CSV_MAX_RECORD_SIZE', [
'Max Record Size:',
'record exceed the maximum number of tolerated bytes',
`of ${max_record_size}`,
`at line ${this.info.lines}`,
], this.options, this.__infoField())
);
}
}
const lappend = ltrim === false || this.state.quoting === true || this.state.field.length !== 0 || !this.__isCharTrimable(buf, pos);
// rtrim in non quoting is handle in __onField
const rappend = rtrim === false || this.state.wasQuoting === false;
if(lappend === true && rappend === true){
this.state.field.append(chr);
}else if(rtrim === true && !this.__isCharTrimable(buf, pos)){
return this.__error(
new CsvError('CSV_NON_TRIMABLE_CHAR_AFTER_CLOSING_QUOTE', [
'Invalid Closing Quote:',
'found non trimable byte after quote',
`at line ${this.info.lines}`,
], this.options, this.__infoField())
);
}else {
if(lappend === false){
pos += this.__isCharTrimable(buf, pos) - 1;
}
continue;
}
}
if(end === true){
// Ensure we are not ending in a quoting state
if(this.state.quoting === true){
const err = this.__error(
new CsvError('CSV_QUOTE_NOT_CLOSED', [
'Quote Not Closed:',
`the parsing is finished with an opening quote at line ${this.info.lines}`,
], this.options, this.__infoField())
);
if(err !== undefined) return err;
}else {
// Skip last line if it has no characters
if(this.state.wasQuoting === true || this.state.record.length !== 0 || this.state.field.length !== 0){
this.info.bytes = this.state.bufBytesStart + pos;
const errField = this.__onField();
if(errField !== undefined) return errField;
const errRecord = this.__onRecord(push);
if(errRecord !== undefined) return errRecord;
}else if(this.state.wasRowDelimiter === true){
this.info.empty_lines++;
}else if(this.state.commenting === true){
this.info.comment_lines++;
}
}
}else {
this.state.bufBytesStart += pos;
this.state.previousBuf = buf.slice(pos);
}
if(this.state.wasRowDelimiter === true){
this.info.lines++;
this.state.wasRowDelimiter = false;
}
},
__onRecord: function(push){
const {columns, group_columns_by_name, encoding, info, from, relax_column_count, relax_column_count_less, relax_column_count_more, raw, skip_records_with_empty_values} = this.options;
const {enabled, record} = this.state;
if(enabled === false){
return this.__resetRecord();
}
// Convert the first line into column names
const recordLength = record.length;
if(columns === true){
if(skip_records_with_empty_values === true && isRecordEmpty(record)){
this.__resetRecord();
return;
}
return this.__firstLineToColumns(record);
}
if(columns === false && this.info.records === 0){
this.state.expectedRecordLength = recordLength;
}
if(recordLength !== this.state.expectedRecordLength){
const err = columns === false ?
new CsvError('CSV_RECORD_INCONSISTENT_FIELDS_LENGTH', [
'Invalid Record Length:',
`expect ${this.state.expectedRecordLength},`,
`got ${recordLength} on line ${this.info.lines}`,
], this.options, this.__infoField(), {
record: record,
})
:
new CsvError('CSV_RECORD_INCONSISTENT_COLUMNS', [
'Invalid Record Length:',
`columns length is ${columns.length},`, // rename columns
`got ${recordLength} on line ${this.info.lines}`,
], this.options, this.__infoField(), {
record: record,
});
if(relax_column_count === true ||
(relax_column_count_less === true && recordLength < this.state.expectedRecordLength) ||
(relax_column_count_more === true && recordLength > this.state.expectedRecordLength)){
this.info.invalid_field_length++;
this.state.error = err;
// Error is undefined with skip_records_with_error
}else {
const finalErr = this.__error(err);
if(finalErr) return finalErr;
}
}
if(skip_records_with_empty_values === true && isRecordEmpty(record)){
this.__resetRecord();
return;
}
if(this.state.recordHasError === true){
this.__resetRecord();
this.state.recordHasError = false;
return;
}
this.info.records++;
if(from === 1 || this.info.records >= from){
const {objname} = this.options;
// With columns, records are object
if(columns !== false){
const obj = {};
// Transform record array to an object
for(let i = 0, l = record.length; i < l; i++){
if(columns[i] === undefined || columns[i].disabled) continue;
// Turn duplicate columns into an array
if (group_columns_by_name === true && obj[columns[i].name] !== undefined) {
if (Array.isArray(obj[columns[i].name])) {
obj[columns[i].name] = obj[columns[i].name].concat(record[i]);
} else {
obj[columns[i].name] = [obj[columns[i].name], record[i]];
}
} else {
obj[columns[i].name] = record[i];
}
}
// Without objname (default)
if(raw === true || info === true){
const extRecord = Object.assign(
{record: obj},
(raw === true ? {raw: this.state.rawBuffer.toString(encoding)}: {}),
(info === true ? {info: this.__infoRecord()}: {})
);
const err = this.__push(
objname === undefined ? extRecord : [obj[objname], extRecord]
, push);
if(err){
return err;
}
}else {
const err = this.__push(
objname === undefined ? obj : [obj[objname], obj]
, push);
if(err){
return err;
}
}
// Without columns, records are array
}else {
if(raw === true || info === true){
const extRecord = Object.assign(
{record: record},
raw === true ? {raw: this.state.rawBuffer.toString(encoding)}: {},
info === true ? {info: this.__infoRecord()}: {}
);
const err = this.__push(
objname === undefined ? extRecord : [record[objname], extRecord]
, push);
if(err){
return err;
}
}else {
const err = this.__push(
objname === undefined ? record : [record[objname], record]
, push);
if(err){
return err;
}
}
}
}
this.__resetRecord();
},
__firstLineToColumns: function(record){
const {firstLineToHeaders} = this.state;
try{
const headers = firstLineToHeaders === undefined ? record : firstLineToHeaders.call(null, record);
if(!Array.isArray(headers)){
return this.__error(
new CsvError('CSV_INVALID_COLUMN_MAPPING', [
'Invalid Column Mapping:',
'expect an array from column function,',
`got ${JSON.stringify(headers)}`
], this.options, this.__infoField(), {
headers: headers,
})
);
}
const normalizedHeaders = normalize_columns_array(headers);
this.state.expectedRecordLength = normalizedHeaders.length;
this.options.columns = normalizedHeaders;
this.__resetRecord();
return;
}catch(err){
return err;
}
},
__resetRecord: function(){
if(this.options.raw === true){
this.state.rawBuffer.reset();
}
this.state.error = undefined;
this.state.record = [];
this.state.record_length = 0;
},
__onField: function(){
const {cast, encoding, rtrim, max_record_size} = this.options;
const {enabled, wasQuoting} = this.state;
// Short circuit for the from_line options
if(enabled === false){
return this.__resetField();
}
let field = this.state.field.toString(encoding);
if(rtrim === true && wasQuoting === false){
field = field.trimRight();
}
if(cast === true){
const [err, f] = this.__cast(field);
if(err !== undefined) return err;
field = f;
}
this.state.record.push(field);
// Increment record length if record size must not exceed a limit
if(max_record_size !== 0 && typeof field === 'string'){
this.state.record_length += field.length;
}
this.__resetField();
},
__resetField: function(){
this.state.field.reset();
this.state.wasQuoting = false;
},
__push: function(record, push){
const {on_record} = this.options;
if(on_record !== undefined){
const info = this.__infoRecord();
try{
record = on_record.call(null, record, info);
}catch(err){
return err;
}
if(record === undefined || record === null){ return; }
}
push(record);
},
// Return a tuple with the error and the casted value
__cast: function(field){
const {columns, relax_column_count} = this.options;
const isColumns = Array.isArray(columns);
// Dont loose time calling cast
// because the final record is an object
// and this field can't be associated to a key present in columns
if(isColumns === true && relax_column_count && this.options.columns.length <= this.state.record.length){
return [undefined, undefined];
}
if(this.state.castField !== null){
try{
const info = this.__infoField();
return [undefined, this.state.castField.call(null, field, info)];
}catch(err){
return [err];
}
}
if(this.__isFloat(field)){
return [undefined, parseFloat(field)];
}else if(this.options.cast_date !== false){
const info = this.__infoField();
return [undefined, this.options.cast_date.call(null, field, info)];
}
return [undefined, field];
},
// Helper to test if a character is a space or a line delimiter
__isCharTrimable: function(buf, pos){
const isTrim = (buf, pos) => {
const {timchars} = this.state;
loop1: for(let i = 0; i < timchars.length; i++){
const timchar = timchars[i];
for(let j = 0; j < timchar.length; j++){
if(timchar[j] !== buf[pos+j]) continue loop1;
}
return timchar.length;
}
return 0;
};
return isTrim(buf, pos);
},
// Keep it in case we implement the `cast_int` option
// __isInt(value){
// // return Number.isInteger(parseInt(value))
// // return !isNaN( parseInt( obj ) );
// return /^(\-|\+)?[1-9][0-9]*$/.test(value)
// }
__isFloat: function(value){
return (value - parseFloat(value) + 1) >= 0; // Borrowed from jquery
},
__compareBytes: function(sourceBuf, targetBuf, targetPos, firstByte){
if(sourceBuf[0] !== firstByte) return 0;
const sourceLength = sourceBuf.length;
for(let i = 1; i < sourceLength; i++){
if(sourceBuf[i] !== targetBuf[targetPos+i]) return 0;
}
return sourceLength;
},
__isDelimiter: function(buf, pos, chr){
const {delimiter, ignore_last_delimiters} = this.options;
if(ignore_last_delimiters === true && this.state.record.length === this.options.columns.length - 1){
return 0;
}else if(ignore_last_delimiters !== false && typeof ignore_last_delimiters === 'number' && this.state.record.length === ignore_last_delimiters - 1){
return 0;
}
loop1: for(let i = 0; i < delimiter.length; i++){
const del = delimiter[i];
if(del[0] === chr){
for(let j = 1; j < del.length; j++){
if(del[j] !== buf[pos+j]) continue loop1;
}
return del.length;
}
}
return 0;
},
__isRecordDelimiter: function(chr, buf, pos){
const {record_delimiter} = this.options;
const recordDelimiterLength = record_delimiter.length;
loop1: for(let i = 0; i < recordDelimiterLength; i++){
const rd = record_delimiter[i];
const rdLength = rd.length;
if(rd[0] !== chr){
continue;
}
for(let j = 1; j < rdLength; j++){
if(rd[j] !== buf[pos+j]){
continue loop1;
}
}
return rd.length;
}
return 0;
},
__isEscape: function(buf, pos, chr){
const {escape} = this.options;
if(escape === null) return false;
const l = escape.length;
if(escape[0] === chr){
for(let i = 0; i < l; i++){
if(escape[i] !== buf[pos+i]){
return false;
}
}
return true;
}
return false;
},
__isQuote: function(buf, pos){
const {quote} = this.options;
if(quote === null) return false;
const l = quote.length;
for(let i = 0; i < l; i++){
if(quote[i] !== buf[pos+i]){
return false;
}
}
return true;
},
__autoDiscoverRecordDelimiter: function(buf, pos){
const { encoding } = this.options;
// Note, we don't need to cache this information in state,
// It is only called on the first line until we find out a suitable
// record delimiter.
const rds = [
// Important, the windows line ending must be before mac os 9
Buffer.from('\r\n', encoding),
Buffer.from('\n', encoding),
Buffer.from('\r', encoding),
];
loop: for(let i = 0; i < rds.length; i++){
const l = rds[i].length;
for(let j = 0; j < l; j++){
if(rds[i][j] !== buf[pos + j]){
continue loop;
}
}
this.options.record_delimiter.push(rds[i]);
this.state.recordDelimiterMaxLength = rds[i].length;
return rds[i].length;
}
return 0;
},
__error: function(msg){
const {encoding, raw, skip_records_with_error} = this.options;
const err = typeof msg === 'string' ? new Error(msg) : msg;
if(skip_records_with_error){
this.state.recordHasError = true;
if(this.options.on_skip !== undefined){
this.options.on_skip(err, raw ? this.state.rawBuffer.toString(encoding) : undefined);
}
// this.emit('skip', err, raw ? this.state.rawBuffer.toString(encoding) : undefined);
return undefined;
}else {
return err;
}
},
__infoDataSet: function(){
return {
...this.info,
columns: this.options.columns
};
},
__infoRecord: function(){
const {columns, raw, encoding} = this.options;
return {
...this.__infoDataSet(),
error: this.state.error,
header: columns === true,
index: this.state.record.length,
raw: raw ? this.state.rawBuffer.toString(encoding) : undefined
};
},
__infoField: function(){
const {columns} = this.options;
const isColumns = Array.isArray(columns);
return {
...this.__infoRecord(),
column: isColumns === true ?
(columns.length > this.state.record.length ?
columns[this.state.record.length].name :
null
) :
this.state.record.length,
quoting: this.state.wasQuoting,
};
}
};
};
const parse = function(data, opts={}){
if(typeof data === 'string'){
data = Buffer.from(data);
}
const records = opts && opts.objname ? {} : [];
const parser = transform(opts);
const push = (record) => {
if(parser.options.objname === undefined)
records.push(record);
else {
records[record[0]] = record[1];
}
};
const close = () => {};
const err1 = parser.parse(data, false, push, close);
if(err1 !== undefined) throw err1;
const err2 = parser.parse(undefined, true, push, close);
if(err2 !== undefined) throw err2;
return records;
};
export { CsvError, parse };