csv-parse
Version:
CSV parsing implementing the Node.js `stream.Transform` API
3,979 lines • 122 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 < -2147483648) {
byteOffset = -2147483648;
}
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, -128);
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, -32768);
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, -32768);
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, -2147483648);
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, -2147483648);
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" || typeof column === "number") {
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.toString(encoding, 0, this.length);
} else {
return Uint8Array.prototype.slice.call(this.buf.slice(0, this.length));
}
}
toJSON() {
return this.toString("utf8");
}
reset() {
this.length = 0;
}
}
const init_state = function (options) {
// ECMAScript WhiteSpace + LineTerminator codepoints, encoded under
// `options.encoding`. Aligns trimming with `String.prototype.trim()`.
// https://tc39.es/ecma262/#sec-white-space
// https://tc39.es/ecma262/#sec-line-terminators
//
// Codepoints unrepresentable in the target encoding are dropped: Node's
// Buffer substitutes them with `?` (0x3F), and including those would cause
// literal `?` bytes in the input to be trimmed under `latin1`/`ascii`.
const timchars = [
// Basic Latin
0x0020, // [Space](https://www.fileformat.info/info/unicode/char/0020/index.htm)
0x0009, // [CHARACTER TABULATION (HT)](https://www.fileformat.info/info/unicode/char/0009/index.htm)
0x000a, // [LINE FEED (LF)](https://www.fileformat.info/info/unicode/char/000a/index.htm)
0x000d, // [CARRIAGE RETURN (CR)](https://www.fileformat.info/info/unicode/char/000d/index.htm)
0x000c, // [FORM FEED (FF)](https://www.fileformat.info/info/unicode/char/000c/index.htm)
0x000b, // [LINE TABULATION (VT)](https://www.fileformat.info/info/unicode/char/000b/index.htm)
// Latin-1 Supplement
0x00a0, // [NO-BREAK SPACE (NBSP)](https://www.fileformat.info/info/unicode/char/00a0/index.htm)
// Ogham
0x1680, // [OGHAM SPACE MARK](https://www.fileformat.info/info/unicode/char/1680/index.htm)
// General Punctuation
0x2000, // [EN QUAD](https://www.fileformat.info/info/unicode/char/2000/index.htm)
0x2001, // [EM QUAD](https://www.fileformat.info/info/unicode/char/2001/index.htm)
0x2002, // [EN SPACE](https://www.fileformat.info/info/unicode/char/2002/index.htm)
0x2003, // [EM SPACE](https://www.fileformat.info/info/unicode/char/2003/index.htm)
0x2004, // [THREE-PER-EM SPACE](https://www.fileformat.info/info/unicode/char/2004/index.htm)
0x2005, // [FOUR-PER-EM SPACE](https://www.fileformat.info/info/unicode/char/2005/index.htm)
0x2006, // [SIX-PER-EM SPACE](https://www.fileformat.info/info/unicode/char/2006/index.htm)
0x2007, // [FIGURE SPACE](https://www.fileformat.info/info/unicode/char/2007/index.htm)
0x2008, // [PUNCTUATION SPACE](https://www.fileformat.info/info/unicode/char/2008/index.htm)
0x2009, // [THIN SPACE](https://www.fileformat.info/info/unicode/char/2009/index.htm)
0x200a, // [HAIR SPACE](https://www.fileformat.info/info/unicode/char/200a/index.htm)
0x2028, // [LINE SEPARATOR](https://www.fileformat.info/info/unicode/char/2028/index.htm)
0x2029, // [PARAGRAPH SEPARATOR](https://www.fileformat.info/info/unicode/char/2029/index.htm)
0x202f, // [NARROW NO-BREAK SPACE (NNBSP)](https://www.fileformat.info/info/unicode/char/202f/index.htm)
0x205f, // [MEDIUM MATHEMATICAL SPACE (MMSP)](https://www.fileformat.info/info/unicode/char/205f/index.htm)
0x3000, // [IDEOGRAPHIC SPACE](https://www.fileformat.info/info/unicode/char/3000/index.htm)
0xfeff, // [ZERO WIDTH NO-BREAK SPACE (BOM)](https://www.fileformat.info/info/unicode/char/feff/index.htm)
].reduce((acc, codepoint) => {
const encoded = Buffer.from(
String.fromCharCode(codepoint),
options.encoding,
);
if (codepoint !== 0x3f && encoded.length === 1 && encoded[0] === 0x3f) {
return acc;
}
acc.push(encoded);
return acc;
}, []);
// First-byte lookup table for `__isCharTrimable`. Non-whitespace bytes
// (the common case) bail out in O(1) without scanning every timchar.
const timcharFirstBytes = new Uint8Array(256);
for (const t of timchars) timcharFirstBytes[t[0]] = 1;
return {
bomSkipped: false,
bufBytesStart: 0,
castField: options.cast_function,
commenting: false,
delimiterBufPrevious: undefined,
delimiterDiscovered: 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
? options.delimiter.map((delimiter) => delimiter.length)
: []),
// Auto discovery of delimiter is limited to 1 character
options.delimiter_auto ? 1 : 0,
// Skip if the remaining buffer can be escape sequence
options.quote !== null ? options.quote.length : 0,
// Skip if the remaining buffer can be a multi-byte trim character
...timchars.map((t) => t.length),
),
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: timchars,
timcharFirstBytes: timcharFirstBytes,
};
};
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 = undefined;
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_auto`
if (
options.delimiter_auto === undefined ||
options.delimiter_auto === null ||
options.delimiter_auto === false
) {
options.delimiter_auto = false;
} else if (options.delimiter_auto === true) {
options.delimiter_auto = {};
} else if (!is_object(options.delimiter_auto)) {
throw new CsvError(
"CSV_INVALID_OPTION_DELIMITER_AUTO",
[
"Invalid option delimiter_auto:",
"delimiter_auto must be a boolean or a configuration object,",
`got ${JSON.stringify(options.delimiter_auto)}`,
],
options,
);
}
if (options.delimiter_auto) {
if (options.delimiter_auto.preferred === undefined)
options.delimiter_auto.preferred = {
[",".charCodeAt(0)]: 1.8,
["\t".charCodeAt(0)]: 1.8,
[";".charCodeAt(0)]: 1.6,
[" ".charCodeAt(0)]: 1.6,
[":".charCodeAt(0)]: 1.5,
[".".charCodeAt(0)]: 1.4,
["/".charCodeAt(0)]: 1.4,
};
else if (!is_object(options.delimiter_auto.preferred)) {
throw new CsvError(
"CSV_INVALID_OPTION_DELIMITER_AUTO",
[
"Invalid option delimiter_auto:",
"preferred must be an object,",
`got ${JSON.stringify(options.delimiter_auto.preferred)}`,
],
options,
);
}
if (options.delimiter_auto.score === undefined)
options.delimiter_auto.score = (info, options) => {
return (
(info.total - info.std) * (options.preferred[info.char_code] || 1)
);
};
else if (typeof options.delimiter_auto.score !== "function") {
throw new CsvError(
"CSV_INVALID_OPTION_DELIMITER_AUTO",
[
"Invalid option delimiter_auto:",
"score must be a function,",
`got ${JSON.stringify(options.delimiter_auto.score)}`,
],
options,
);
}
if (options.delimiter_auto.size === undefined)
options.delimiter_auto.size = 2048;
else if (typeof options.delimiter_auto.size !== "number") {
throw new CsvError(
"CSV_INVALID_OPTION_DELIMITER_AUTO",
[
"Invalid option delimiter_auto:",
"size must be a number,",
`got ${JSON.stringify(options.delimiter_auto.size)}`,
],
options,
);
}
}
// Normalize option `delimiter`
const delimiter_json = JSON.stringify(options.delimiter);
if (options.delimiter_auto !== false) {
options.delimiter = [];
}
if (!Array.isArray(options.delimiter)) {
if (
options.delimiter === undefined ||
options.delimiter === null ||
options.delimiter === false
) {
options.delimiter = Buffer.from(",", options.encoding);
}
options.delimiter = [options.delimiter];
}
options.delimiter = options.delimiter.map(function (delimiter) {
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 `on_skip`
// options.on_skip ??= (err, chunk) => {
// this.emit('skip', err, chunk);
// };
if (
options.on_skip !== undefined &&
options.on_skip !== null &&
typeof options.on_skip !== "function"
) {
throw new Error(
`Invalid Option: on_skip must be a function, got ${JSON.stringify(options.on_skip)}`,
);
}
// 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 (options.to !== -1) {
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 (options.to_line !== -1) {
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;
};
// Discussed in [issue #400](https://github.com/adaltas/node-csv/issues/400)
// See https://github.com/python/cpython/blob/ea1b1c579f600cc85d145c60862b2e6b98701b24/Lib/csv.py#L349
const delimiter_discover = function (records, options) {
// Normalize the configuration
if (!options) {
({ delimiter_auto: options } = normalize_options({ delimiter_auto: true }));
}
// Convert String to Buffer
if (typeof records === "string") {
records = Buffer.from(records);
}
// Convert Buffer to an array of records
if (isBuffer(records)) {
records = ((data) => {
const records = [];
const parser = transform({ delimiter: [] });
const push = (record) => records.push(record);
const close = () => {};
const error = parser.parse(data, true, push, close);
if (error !== undefined) throw error;
return records;
})(records);
}
// Info array initialization, 127 entries, one per char code
const info = Array(127)
.fill()
.map(() => ({ lines: [] }));
// Traverse each records, count occurences per char code
records.map(([record], line) => {
for (let i = 0, l = record.length; i < l; i++) {
// Count the character frequency
const code = record.charCodeAt(i);
if (info[code].lines[line] === undefined) info[code].lines[line] = 0;
info[code].lines[line]++;
}
});
// Traverse each char code, compute the score
info.map((info, i) => {
info.char_code = i;
info.std = std(info.lines);
info.total = info.lines.reduce((acc, val) => acc + val, 0);
info.preferred = !!options.preferred[i];
info.score = options.score(info, options);
});
// Extract the dominant character
const result = info.reduce(
(acc, info) => (acc.score > info.score ? acc : info),
{},
);
return String.fromCharCode(result.char_code);
};
const std = function (array) {
const n = array.length;
if (n === 0) return 0;
const mean = array.reduce((a, b) => a + b) / n;
return Math.sqrt(
array.map((x) => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / n,
);
};
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,
bytes_records: 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,
delimiter_auto,
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,
delimiterDiscovered,
delimiterBufPrevious,
rawBuffer,
escapeIsQuote,
} = this.state;
// Automatic delimiter discovery
if (!delimiterDiscovered && delimiter_auto) {
let delimiterBuf;
if (delimiterBufPrevious === undefined) {
delimiterBuf = nextBuf;
} else if (
delimiterBufPrevious !== undefined &&
nextBuf === undefined
) {
delimiterBuf = delimiterBufPrevious;
} else {
delimiterBuf = Buffer.concat([delimiterBufPrevious, nextBuf]);
}
// Ensure that nextBuf is not concatenated a second time during buffer reconciliation
nextBuf = undefined;
// this.delimiterBufPrevious = delimiterBuf;
if (end || delimiterBuf.length > delimiter_auto.size) {
this.options.delimiter = [
Buffer.from(
delimiter_discover(delimiterBuf, this.options.delimiter_auto),
),
];
this.state.previousBuf = delimiterBuf;
this.state.delimiterBufPrevious = undefined;
this.state.delimiterDiscovered = true;
} else {
this.state.delimiterBufPrevious = delimiterBuf;
return;
}
}
// Previous buffers reconciliation
const { previousBuf } = 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
const options = normalize_options({
...this.original_options,
encoding: encoding,
});
// Properties are merged with the existing options instance
for (const key in options) {
this.options[key] = options[key];
}
// 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 emission 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;
}
if (
comment !== null &&
(comment_no_infix === false ||
(this.state.record.length === 0 &&
this.state.field.length === 0))
) {
const commentCount = this.__compareBytes(comment, buf, pos, chr);
if (commentCount !== 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 &&
Object.hasOwn(obj, columns[i].name)
) {
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 {
Object.defineProperty(obj, columns[i].name, {
value: record[i],
enumerable: true,
writable: true,
configurable: true,
});
}
}
// 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;
}
}
this.info.bytes_records += this.info.bytes;
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];
},
__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;
},
// Helper to test if a character is trimable
__isCharTrimable: function (buf, pos) {
const { timchars, timcharFirstBytes } = this.state;
// Fast bail-out: non-whitespace bytes (the common case) are rejected
// without scanning the full timchar list.
const first = buf[pos];
if (first === undefined || timcharFirstBytes[first] === 0) return 0;
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;
},
__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;
},
__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;
},
__isFloat: function (value) {
return value - parseFloat(value) + 1 >= 0; // Borrowed from jquery
},
// 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)
// }
__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;
},
__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;
},
__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) {
try {
this.options.on_skip(
err,
raw ? this.state.rawBuffer.toString(encoding) : undefined,
);
} catch (err) {
return err;
}
}
// 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(),
bytes_records: this.info.bytes,
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);
// Bytes records are only incremented when all records'fields are parsed
const bytes_records = this.info.bytes_records;
return {
...this.__infoRecord(),
bytes_records: bytes_records,
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 ? Object.create(null) : [];
const parser = transform(opts);
const push = (record) => {
if (parser.options.objname === undefined) records.push(record);
else {
records[record[0]] = record[1];
}
};
const close = () => {};
const error = parser.parse(data, true, push, close);
if (error !== undefined) throw error;
return records;
};
export { CsvError, normalize_options, parse };