-function SlowBuffer (size) {
- this.length = size;
-};
-
var assert = require('assert');
+var SlowBuffer = require('./slow_buffer');
exports.INSPECT_MAX_BYTES = 50;
-
-function toHex(n) {
- if (n < 16) return '0' + n.toString(16);
- return n.toString(16);
-}
-
-function utf8ToBytes(str) {
- var byteArray = [];
- for (var i = 0; i < str.length; i++)
- if (str.charCodeAt(i) <= 0x7F)
- byteArray.push(str.charCodeAt(i));
- else {
- var h = encodeURIComponent(str.charAt(i)).substr(1).split('%');
- for (var j = 0; j < h.length; j++)
- byteArray.push(parseInt(h[j], 16));
- }
-
- return byteArray;
-}
-
-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 base64ToBytes(str) {
- return require("base64-js").toByteArray(str);
-}
-
-SlowBuffer.byteLength = function (str, encoding) {
- switch (encoding || "utf8") {
- case 'hex':
- return str.length / 2;
-
- case 'utf8':
- case 'utf-8':
- return utf8ToBytes(str).length;
-
- case 'ascii':
- case 'binary':
- return str.length;
-
- case 'base64':
- return base64ToBytes(str).length;
-
- default:
- throw new Error('Unknown encoding');
- }
-};
-
-function blitBuffer(src, dst, offset, length) {
- var pos, i = 0;
- while (i < length) {
- if ((i+offset >= dst.length) || (i >= src.length))
- break;
-
- dst[i + offset] = src[i];
- i++;
- }
- return i;
-}
-
-SlowBuffer.prototype.utf8Write = function (string, offset, length) {
- var bytes, pos;
- return SlowBuffer._charsWritten = blitBuffer(utf8ToBytes(string), this, offset, length);
-};
-
-SlowBuffer.prototype.asciiWrite = function (string, offset, length) {
- var bytes, pos;
- return SlowBuffer._charsWritten = blitBuffer(asciiToBytes(string), this, offset, length);
-};
-
-SlowBuffer.prototype.binaryWrite = SlowBuffer.prototype.asciiWrite;
-
-SlowBuffer.prototype.base64Write = function (string, offset, length) {
- var bytes, pos;
- return SlowBuffer._charsWritten = blitBuffer(base64ToBytes(string), this, offset, length);
-};
-
-SlowBuffer.prototype.base64Slice = function (start, end) {
- var bytes = Array.prototype.slice.apply(this, arguments)
- return require("base64-js").fromByteArray(bytes);
-}
-
-function decodeUtf8Char(str) {
- try {
- return decodeURIComponent(str);
- } catch (err) {
- return String.fromCharCode(0xFFFD); // UTF 8 invalid char
- }
-}
-
-SlowBuffer.prototype.utf8Slice = function () {
- var bytes = Array.prototype.slice.apply(this, arguments);
- var res = "";
- var tmp = "";
- var i = 0;
- while (i < bytes.length) {
- if (bytes[i] <= 0x7F) {
- res += decodeUtf8Char(tmp) + String.fromCharCode(bytes[i]);
- tmp = "";
- } else
- tmp += "%" + bytes[i].toString(16);
-
- i++;
- }
-
- return res + decodeUtf8Char(tmp);
-}
-
-SlowBuffer.prototype.asciiSlice = function () {
- var bytes = Array.prototype.slice.apply(this, arguments);
- var ret = "";
- for (var i = 0; i < bytes.length; i++)
- ret += String.fromCharCode(bytes[i]);
- return ret;
-}
-
-SlowBuffer.prototype.binarySlice = SlowBuffer.prototype.asciiSlice;
-
-SlowBuffer.prototype.inspect = function() {
- var out = [],
- len = this.length;
- for (var i = 0; i < len; i++) {
- out[i] = toHex(this[i]);
- if (i == exports.INSPECT_MAX_BYTES) {
- out[i + 1] = '...';
- break;
- }
- }
- return '<SlowBuffer ' + out.join(' ') + '>';
-};
-
-
-SlowBuffer.prototype.hexSlice = function(start, end) {
- var len = this.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(this[i]);
- }
- return out;
-};
-
-
-SlowBuffer.prototype.toString = function(encoding, start, end) {
- encoding = String(encoding || 'utf8').toLowerCase();
- start = +start || 0;
- if (typeof end == 'undefined') end = this.length;
-
- // Fastpath empty strings
- if (+end == start) {
- return '';
- }
-
- switch (encoding) {
- case 'hex':
- return this.hexSlice(start, end);
-
- case 'utf8':
- case 'utf-8':
- return this.utf8Slice(start, end);
-
- case 'ascii':
- return this.asciiSlice(start, end);
-
- case 'binary':
- return this.binarySlice(start, end);
-
- case 'base64':
- return this.base64Slice(start, end);
-
- case 'ucs2':
- case 'ucs-2':
- return this.ucs2Slice(start, end);
-
- default:
- throw new Error('Unknown encoding');
- }
-};
-
-
-SlowBuffer.prototype.hexWrite = function(string, offset, length) {
- offset = +offset || 0;
- var remaining = this.length - offset;
- if (!length) {
- length = remaining;
- } else {
- length = +length;
- if (length > remaining) {
- length = remaining;
- }
- }
-
- // must be an even number of digits
- var strLen = string.length;
- if (strLen % 2) {
- throw new Error('Invalid hex string');
- }
- if (length > strLen / 2) {
- length = strLen / 2;
- }
- for (var i = 0; i < length; i++) {
- var byte = parseInt(string.substr(i * 2, 2), 16);
- if (isNaN(byte)) throw new Error('Invalid hex string');
- this[offset + i] = byte;
- }
- SlowBuffer._charsWritten = i * 2;
- return i;
-};
-
-
-SlowBuffer.prototype.write = function(string, offset, length, encoding) {
- // Support both (string, offset, length, encoding)
- // and the legacy (string, encoding, offset, length)
- if (isFinite(offset)) {
- if (!isFinite(length)) {
- encoding = length;
- length = undefined;
- }
- } else { // legacy
- var swap = encoding;
- encoding = offset;
- offset = length;
- length = swap;
- }
-
- offset = +offset || 0;
- var remaining = this.length - offset;
- if (!length) {
- length = remaining;
- } else {
- length = +length;
- if (length > remaining) {
- length = remaining;
- }
- }
- encoding = String(encoding || 'utf8').toLowerCase();
-
- switch (encoding) {
- case 'hex':
- return this.hexWrite(string, offset, length);
-
- case 'utf8':
- case 'utf-8':
- return this.utf8Write(string, offset, length);
-
- case 'ascii':
- return this.asciiWrite(string, offset, length);
-
- case 'binary':
- return this.binaryWrite(string, offset, length);
-
- case 'base64':
- return this.base64Write(string, offset, length);
-
- case 'ucs2':
- case 'ucs-2':
- return this.ucs2Write(string, offset, length);
-
- default:
- throw new Error('Unknown encoding');
- }
-};
-
-
-// slice(start, end)
-SlowBuffer.prototype.slice = function(start, end) {
- if (end === undefined) end = this.length;
-
- if (end > this.length) {
- throw new Error('oob');
- }
- if (start > end) {
- throw new Error('oob');
- }
-
- return new Buffer(this, end - start, +start);
-};
-
-SlowBuffer.prototype.copy = function(target, targetstart, sourcestart, sourceend) {
- var temp = [];
- for (var i=sourcestart; i<sourceend; i++) {
- assert.ok(typeof this[i] !== 'undefined', "copying undefined buffer bytes!");
- temp.push(this[i]);
- }
-
- for (var i=targetstart; i<targetstart+temp.length; i++) {
- target[i] = temp[i-targetstart];
- }
-};
-
-SlowBuffer.prototype.fill = function(value, start, end) {
- if (end > this.length) {
- throw new Error('oob');
- }
- if (start > end) {
- throw new Error('oob');
- }
-
- for (var i = start; i < end; i++) {
- this[i] = value;
- }
-}
-
function coerce(length) {
// Coerce length to a number (possibly NaN), round up
// in case it's fractional (e.g. 123.456) then do a
return length < 0 ? 0 : length;
}
+function toHex(n) {
+ if (n < 16) return '0' + n.toString(16);
+ return n.toString(16);
+}
// Buffer
--- /dev/null
+module.exports = SlowBuffer;
+
+function SlowBuffer (size) {
+ this.length = size;
+};
+
+var assert = require('assert');
+
+exports.INSPECT_MAX_BYTES = 50;
+
+
+function toHex(n) {
+ if (n < 16) return '0' + n.toString(16);
+ return n.toString(16);
+}
+
+function utf8ToBytes(str) {
+ var byteArray = [];
+ for (var i = 0; i < str.length; i++)
+ if (str.charCodeAt(i) <= 0x7F)
+ byteArray.push(str.charCodeAt(i));
+ else {
+ var h = encodeURIComponent(str.charAt(i)).substr(1).split('%');
+ for (var j = 0; j < h.length; j++)
+ byteArray.push(parseInt(h[j], 16));
+ }
+
+ return byteArray;
+}
+
+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 base64ToBytes(str) {
+ return require("base64-js").toByteArray(str);
+}
+
+SlowBuffer.byteLength = function (str, encoding) {
+ switch (encoding || "utf8") {
+ case 'hex':
+ return str.length / 2;
+
+ case 'utf8':
+ case 'utf-8':
+ return utf8ToBytes(str).length;
+
+ case 'ascii':
+ case 'binary':
+ return str.length;
+
+ case 'base64':
+ return base64ToBytes(str).length;
+
+ default:
+ throw new Error('Unknown encoding');
+ }
+};
+
+function blitBuffer(src, dst, offset, length) {
+ var pos, i = 0;
+ while (i < length) {
+ if ((i+offset >= dst.length) || (i >= src.length))
+ break;
+
+ dst[i + offset] = src[i];
+ i++;
+ }
+ return i;
+}
+
+SlowBuffer.prototype.utf8Write = function (string, offset, length) {
+ var bytes, pos;
+ return SlowBuffer._charsWritten = blitBuffer(utf8ToBytes(string), this, offset, length);
+};
+
+SlowBuffer.prototype.asciiWrite = function (string, offset, length) {
+ var bytes, pos;
+ return SlowBuffer._charsWritten = blitBuffer(asciiToBytes(string), this, offset, length);
+};
+
+SlowBuffer.prototype.binaryWrite = SlowBuffer.prototype.asciiWrite;
+
+SlowBuffer.prototype.base64Write = function (string, offset, length) {
+ var bytes, pos;
+ return SlowBuffer._charsWritten = blitBuffer(base64ToBytes(string), this, offset, length);
+};
+
+SlowBuffer.prototype.base64Slice = function (start, end) {
+ var bytes = Array.prototype.slice.apply(this, arguments)
+ return require("base64-js").fromByteArray(bytes);
+}
+
+function decodeUtf8Char(str) {
+ try {
+ return decodeURIComponent(str);
+ } catch (err) {
+ return String.fromCharCode(0xFFFD); // UTF 8 invalid char
+ }
+}
+
+SlowBuffer.prototype.utf8Slice = function () {
+ var bytes = Array.prototype.slice.apply(this, arguments);
+ var res = "";
+ var tmp = "";
+ var i = 0;
+ while (i < bytes.length) {
+ if (bytes[i] <= 0x7F) {
+ res += decodeUtf8Char(tmp) + String.fromCharCode(bytes[i]);
+ tmp = "";
+ } else
+ tmp += "%" + bytes[i].toString(16);
+
+ i++;
+ }
+
+ return res + decodeUtf8Char(tmp);
+}
+
+SlowBuffer.prototype.asciiSlice = function () {
+ var bytes = Array.prototype.slice.apply(this, arguments);
+ var ret = "";
+ for (var i = 0; i < bytes.length; i++)
+ ret += String.fromCharCode(bytes[i]);
+ return ret;
+}
+
+SlowBuffer.prototype.binarySlice = SlowBuffer.prototype.asciiSlice;
+
+SlowBuffer.prototype.inspect = function() {
+ var out = [],
+ len = this.length;
+ for (var i = 0; i < len; i++) {
+ out[i] = toHex(this[i]);
+ if (i == exports.INSPECT_MAX_BYTES) {
+ out[i + 1] = '...';
+ break;
+ }
+ }
+ return '<SlowBuffer ' + out.join(' ') + '>';
+};
+
+
+SlowBuffer.prototype.hexSlice = function(start, end) {
+ var len = this.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(this[i]);
+ }
+ return out;
+};
+
+
+SlowBuffer.prototype.toString = function(encoding, start, end) {
+ encoding = String(encoding || 'utf8').toLowerCase();
+ start = +start || 0;
+ if (typeof end == 'undefined') end = this.length;
+
+ // Fastpath empty strings
+ if (+end == start) {
+ return '';
+ }
+
+ switch (encoding) {
+ case 'hex':
+ return this.hexSlice(start, end);
+
+ case 'utf8':
+ case 'utf-8':
+ return this.utf8Slice(start, end);
+
+ case 'ascii':
+ return this.asciiSlice(start, end);
+
+ case 'binary':
+ return this.binarySlice(start, end);
+
+ case 'base64':
+ return this.base64Slice(start, end);
+
+ case 'ucs2':
+ case 'ucs-2':
+ return this.ucs2Slice(start, end);
+
+ default:
+ throw new Error('Unknown encoding');
+ }
+};
+
+
+SlowBuffer.prototype.hexWrite = function(string, offset, length) {
+ offset = +offset || 0;
+ var remaining = this.length - offset;
+ if (!length) {
+ length = remaining;
+ } else {
+ length = +length;
+ if (length > remaining) {
+ length = remaining;
+ }
+ }
+
+ // must be an even number of digits
+ var strLen = string.length;
+ if (strLen % 2) {
+ throw new Error('Invalid hex string');
+ }
+ if (length > strLen / 2) {
+ length = strLen / 2;
+ }
+ for (var i = 0; i < length; i++) {
+ var byte = parseInt(string.substr(i * 2, 2), 16);
+ if (isNaN(byte)) throw new Error('Invalid hex string');
+ this[offset + i] = byte;
+ }
+ SlowBuffer._charsWritten = i * 2;
+ return i;
+};
+
+
+SlowBuffer.prototype.write = function(string, offset, length, encoding) {
+ // Support both (string, offset, length, encoding)
+ // and the legacy (string, encoding, offset, length)
+ if (isFinite(offset)) {
+ if (!isFinite(length)) {
+ encoding = length;
+ length = undefined;
+ }
+ } else { // legacy
+ var swap = encoding;
+ encoding = offset;
+ offset = length;
+ length = swap;
+ }
+
+ offset = +offset || 0;
+ var remaining = this.length - offset;
+ if (!length) {
+ length = remaining;
+ } else {
+ length = +length;
+ if (length > remaining) {
+ length = remaining;
+ }
+ }
+ encoding = String(encoding || 'utf8').toLowerCase();
+
+ switch (encoding) {
+ case 'hex':
+ return this.hexWrite(string, offset, length);
+
+ case 'utf8':
+ case 'utf-8':
+ return this.utf8Write(string, offset, length);
+
+ case 'ascii':
+ return this.asciiWrite(string, offset, length);
+
+ case 'binary':
+ return this.binaryWrite(string, offset, length);
+
+ case 'base64':
+ return this.base64Write(string, offset, length);
+
+ case 'ucs2':
+ case 'ucs-2':
+ return this.ucs2Write(string, offset, length);
+
+ default:
+ throw new Error('Unknown encoding');
+ }
+};
+
+
+// slice(start, end)
+SlowBuffer.prototype.slice = function(start, end) {
+ if (end === undefined) end = this.length;
+
+ if (end > this.length) {
+ throw new Error('oob');
+ }
+ if (start > end) {
+ throw new Error('oob');
+ }
+
+ return new Buffer(this, end - start, +start);
+};
+
+SlowBuffer.prototype.copy = function(target, targetstart, sourcestart, sourceend) {
+ var temp = [];
+ for (var i=sourcestart; i<sourceend; i++) {
+ assert.ok(typeof this[i] !== 'undefined', "copying undefined buffer bytes!");
+ temp.push(this[i]);
+ }
+
+ for (var i=targetstart; i<targetstart+temp.length; i++) {
+ target[i] = temp[i-targetstart];
+ }
+};
+
+SlowBuffer.prototype.fill = function(value, start, end) {
+ if (end > this.length) {
+ throw new Error('oob');
+ }
+ if (start > end) {
+ throw new Error('oob');
+ }
+
+ for (var i = start; i < end; i++) {
+ this[i] = value;
+ }
+}
projects / buffer.git / commitdiff