diff options
Diffstat (limited to 'sandbox/testAppNevena/Front/node_modules/chardet/encoding/mbcs.js')
-rw-r--r-- | sandbox/testAppNevena/Front/node_modules/chardet/encoding/mbcs.js | 502 |
1 files changed, 0 insertions, 502 deletions
diff --git a/sandbox/testAppNevena/Front/node_modules/chardet/encoding/mbcs.js b/sandbox/testAppNevena/Front/node_modules/chardet/encoding/mbcs.js deleted file mode 100644 index 5aa1557b..00000000 --- a/sandbox/testAppNevena/Front/node_modules/chardet/encoding/mbcs.js +++ /dev/null @@ -1,502 +0,0 @@ -var util = require('util'), - Match = require ('../match'); - -/** - * Binary search implementation (recursive) - */ -function binarySearch(arr, searchValue) { - function find(arr, searchValue, left, right) { - if (right < left) - return -1; - - /* - int mid = mid = (left + right) / 2; - There is a bug in the above line; - Joshua Bloch suggests the following replacement: - */ - var mid = Math.floor((left + right) >>> 1); - if (searchValue > arr[mid]) - return find(arr, searchValue, mid + 1, right); - - if (searchValue < arr[mid]) - return find(arr, searchValue, left, mid - 1); - - return mid; - }; - - return find(arr, searchValue, 0, arr.length - 1); -}; - -// 'Character' iterated character class. -// Recognizers for specific mbcs encodings make their 'characters' available -// by providing a nextChar() function that fills in an instance of iteratedChar -// with the next char from the input. -// The returned characters are not converted to Unicode, but remain as the raw -// bytes (concatenated into an int) from the codepage data. -// -// For Asian charsets, use the raw input rather than the input that has been -// stripped of markup. Detection only considers multi-byte chars, effectively -// stripping markup anyway, and double byte chars do occur in markup too. -// -function IteratedChar() { - - this.charValue = 0; // 1-4 bytes from the raw input data - this.index = 0; - this.nextIndex = 0; - this.error = false; - this.done = false; - - this.reset = function() { - this.charValue = 0; - this.index = -1; - this.nextIndex = 0; - this.error = false; - this.done = false; - }; - - this.nextByte = function(det) { - if (this.nextIndex >= det.fRawLength) { - this.done = true; - return -1; - } - var byteValue = det.fRawInput[this.nextIndex++] & 0x00ff; - return byteValue; - }; -}; - - - -/** - * Asian double or multi-byte - charsets. - * Match is determined mostly by the input data adhering to the - * encoding scheme for the charset, and, optionally, - * frequency-of-occurence of characters. - */ - -function mbcs() {}; - -/** - * Test the match of this charset with the input text data - * which is obtained via the CharsetDetector object. - * - * @param det The CharsetDetector, which contains the input text - * to be checked for being in this charset. - * @return Two values packed into one int (Damn java, anyhow) - * bits 0-7: the match confidence, ranging from 0-100 - * bits 8-15: The match reason, an enum-like value. - */ -mbcs.prototype.match = function(det) { - - var singleByteCharCount = 0, //TODO Do we really need this? - doubleByteCharCount = 0, - commonCharCount = 0, - badCharCount = 0, - totalCharCount = 0, - confidence = 0; - - var iter = new IteratedChar(); - - detectBlock: { - for (iter.reset(); this.nextChar(iter, det);) { - totalCharCount++; - if (iter.error) { - badCharCount++; - } else { - var cv = iter.charValue & 0xFFFFFFFF; - - if (cv <= 0xff) { - singleByteCharCount++; - } else { - doubleByteCharCount++; - if (this.commonChars != null) { - // NOTE: This assumes that there are no 4-byte common chars. - if (binarySearch(this.commonChars, cv) >= 0) { - commonCharCount++; - } - } - } - } - if (badCharCount >= 2 && badCharCount * 5 >= doubleByteCharCount) { - // console.log('its here!') - // Bail out early if the byte data is not matching the encoding scheme. - break detectBlock; - } - } - - if (doubleByteCharCount <= 10 && badCharCount== 0) { - // Not many multi-byte chars. - if (doubleByteCharCount == 0 && totalCharCount < 10) { - // There weren't any multibyte sequences, and there was a low density of non-ASCII single bytes. - // We don't have enough data to have any confidence. - // Statistical analysis of single byte non-ASCII charcters would probably help here. - confidence = 0; - } - else { - // ASCII or ISO file? It's probably not our encoding, - // but is not incompatible with our encoding, so don't give it a zero. - confidence = 10; - } - break detectBlock; - } - - // - // No match if there are too many characters that don't fit the encoding scheme. - // (should we have zero tolerance for these?) - // - if (doubleByteCharCount < 20 * badCharCount) { - confidence = 0; - break detectBlock; - } - - if (this.commonChars == null) { - // We have no statistics on frequently occuring characters. - // Assess confidence purely on having a reasonable number of - // multi-byte characters (the more the better - confidence = 30 + doubleByteCharCount - 20 * badCharCount; - if (confidence > 100) { - confidence = 100; - } - } else { - // - // Frequency of occurence statistics exist. - // - var maxVal = Math.log(parseFloat(doubleByteCharCount) / 4); - var scaleFactor = 90.0 / maxVal; - confidence = Math.floor(Math.log(commonCharCount + 1) * scaleFactor + 10); - confidence = Math.min(confidence, 100); - } - } // end of detectBlock: - - return confidence == 0 ? null : new Match(det, this, confidence); -}; - -/** - * Get the next character (however many bytes it is) from the input data - * Subclasses for specific charset encodings must implement this function - * to get characters according to the rules of their encoding scheme. - * - * This function is not a method of class iteratedChar only because - * that would require a lot of extra derived classes, which is awkward. - * @param it The iteratedChar 'struct' into which the returned char is placed. - * @param det The charset detector, which is needed to get at the input byte data - * being iterated over. - * @return True if a character was returned, false at end of input. - */ - -mbcs.prototype.nextChar = function(iter, det) {}; - - - -/** - * Shift-JIS charset recognizer. - */ -module.exports.sjis = function() { - this.name = function() { - return 'Shift-JIS'; - }; - this.language = function() { - return 'ja'; - }; - - // TODO: This set of data comes from the character frequency- - // of-occurence analysis tool. The data needs to be moved - // into a resource and loaded from there. - this.commonChars = [ - 0x8140, 0x8141, 0x8142, 0x8145, 0x815b, 0x8169, 0x816a, 0x8175, 0x8176, 0x82a0, - 0x82a2, 0x82a4, 0x82a9, 0x82aa, 0x82ab, 0x82ad, 0x82af, 0x82b1, 0x82b3, 0x82b5, - 0x82b7, 0x82bd, 0x82be, 0x82c1, 0x82c4, 0x82c5, 0x82c6, 0x82c8, 0x82c9, 0x82cc, - 0x82cd, 0x82dc, 0x82e0, 0x82e7, 0x82e8, 0x82e9, 0x82ea, 0x82f0, 0x82f1, 0x8341, - 0x8343, 0x834e, 0x834f, 0x8358, 0x835e, 0x8362, 0x8367, 0x8375, 0x8376, 0x8389, - 0x838a, 0x838b, 0x838d, 0x8393, 0x8e96, 0x93fa, 0x95aa - ]; - - this.nextChar = function(iter, det) { - iter.index = iter.nextIndex; - iter.error = false; - - var firstByte; - firstByte = iter.charValue = iter.nextByte(det); - if (firstByte < 0) - return false; - - if (firstByte <= 0x7f || (firstByte > 0xa0 && firstByte <= 0xdf)) - return true; - - var secondByte = iter.nextByte(det); - if (secondByte < 0) - return false; - - iter.charValue = (firstByte << 8) | secondByte; - if (! ((secondByte >= 0x40 && secondByte <= 0x7f) || (secondByte >= 0x80 && secondByte <= 0xff))) { - // Illegal second byte value. - iter.error = true; - } - return true; - }; -}; -util.inherits(module.exports.sjis, mbcs); - - - -/** - * Big5 charset recognizer. - */ -module.exports.big5 = function() { - this.name = function() { - return 'Big5'; - }; - this.language = function() { - return 'zh'; - }; - // TODO: This set of data comes from the character frequency- - // of-occurence analysis tool. The data needs to be moved - // into a resource and loaded from there. - this.commonChars = [ - 0xa140, 0xa141, 0xa142, 0xa143, 0xa147, 0xa149, 0xa175, 0xa176, 0xa440, 0xa446, - 0xa447, 0xa448, 0xa451, 0xa454, 0xa457, 0xa464, 0xa46a, 0xa46c, 0xa477, 0xa4a3, - 0xa4a4, 0xa4a7, 0xa4c1, 0xa4ce, 0xa4d1, 0xa4df, 0xa4e8, 0xa4fd, 0xa540, 0xa548, - 0xa558, 0xa569, 0xa5cd, 0xa5e7, 0xa657, 0xa661, 0xa662, 0xa668, 0xa670, 0xa6a8, - 0xa6b3, 0xa6b9, 0xa6d3, 0xa6db, 0xa6e6, 0xa6f2, 0xa740, 0xa751, 0xa759, 0xa7da, - 0xa8a3, 0xa8a5, 0xa8ad, 0xa8d1, 0xa8d3, 0xa8e4, 0xa8fc, 0xa9c0, 0xa9d2, 0xa9f3, - 0xaa6b, 0xaaba, 0xaabe, 0xaacc, 0xaafc, 0xac47, 0xac4f, 0xacb0, 0xacd2, 0xad59, - 0xaec9, 0xafe0, 0xb0ea, 0xb16f, 0xb2b3, 0xb2c4, 0xb36f, 0xb44c, 0xb44e, 0xb54c, - 0xb5a5, 0xb5bd, 0xb5d0, 0xb5d8, 0xb671, 0xb7ed, 0xb867, 0xb944, 0xbad8, 0xbb44, - 0xbba1, 0xbdd1, 0xc2c4, 0xc3b9, 0xc440, 0xc45f - ]; - this.nextChar = function(iter, det) { - iter.index = iter.nextIndex; - iter.error = false; - - var firstByte = iter.charValue = iter.nextByte(det); - - if (firstByte < 0) - return false; - - // single byte character. - if (firstByte <= 0x7f || firstByte == 0xff) - return true; - - var secondByte = iter.nextByte(det); - - if (secondByte < 0) - return false; - - iter.charValue = (iter.charValue << 8) | secondByte; - - if (secondByte < 0x40 || secondByte == 0x7f || secondByte == 0xff) - iter.error = true; - - return true; - }; -}; -util.inherits(module.exports.big5, mbcs); - - - -/** - * EUC charset recognizers. One abstract class that provides the common function - * for getting the next character according to the EUC encoding scheme, - * and nested derived classes for EUC_KR, EUC_JP, EUC_CN. - * - * Get the next character value for EUC based encodings. - * Character 'value' is simply the raw bytes that make up the character - * packed into an int. - */ -function eucNextChar(iter, det) { - iter.index = iter.nextIndex; - iter.error = false; - var firstByte = 0; - var secondByte = 0; - var thirdByte = 0; - //int fourthByte = 0; - buildChar: { - firstByte = iter.charValue = iter.nextByte(det); - if (firstByte < 0) { - // Ran off the end of the input data - iter.done = true; - break buildChar; - } - if (firstByte <= 0x8d) { - // single byte char - break buildChar; - } - secondByte = iter.nextByte(det); - iter.charValue = (iter.charValue << 8) | secondByte; - if (firstByte >= 0xA1 && firstByte <= 0xfe) { - // Two byte Char - if (secondByte < 0xa1) { - iter.error = true; - } - break buildChar; - } - if (firstByte == 0x8e) { - // Code Set 2. - // In EUC-JP, total char size is 2 bytes, only one byte of actual char value. - // In EUC-TW, total char size is 4 bytes, three bytes contribute to char value. - // We don't know which we've got. - // Treat it like EUC-JP. If the data really was EUC-TW, the following two - // bytes will look like a well formed 2 byte char. - if (secondByte < 0xa1) { - iter.error = true; - } - break buildChar; - } - if (firstByte == 0x8f) { - // Code set 3. - // Three byte total char size, two bytes of actual char value. - thirdByte = iter.nextByte(det); - iter.charValue = (iter.charValue << 8) | thirdByte; - if (thirdByte < 0xa1) { - iter.error = true; - } - } - } - return iter.done == false; -}; - - - -/** - * The charset recognize for EUC-JP. A singleton instance of this class - * is created and kept by the public CharsetDetector class - */ -module.exports.euc_jp = function() { - this.name = function() { - return 'EUC-JP'; - }; - this.language = function() { - return 'ja'; - }; - - // TODO: This set of data comes from the character frequency- - // of-occurence analysis tool. The data needs to be moved - // into a resource and loaded from there. - this.commonChars = [ - 0xa1a1, 0xa1a2, 0xa1a3, 0xa1a6, 0xa1bc, 0xa1ca, 0xa1cb, 0xa1d6, 0xa1d7, 0xa4a2, - 0xa4a4, 0xa4a6, 0xa4a8, 0xa4aa, 0xa4ab, 0xa4ac, 0xa4ad, 0xa4af, 0xa4b1, 0xa4b3, - 0xa4b5, 0xa4b7, 0xa4b9, 0xa4bb, 0xa4bd, 0xa4bf, 0xa4c0, 0xa4c1, 0xa4c3, 0xa4c4, - 0xa4c6, 0xa4c7, 0xa4c8, 0xa4c9, 0xa4ca, 0xa4cb, 0xa4ce, 0xa4cf, 0xa4d0, 0xa4de, - 0xa4df, 0xa4e1, 0xa4e2, 0xa4e4, 0xa4e8, 0xa4e9, 0xa4ea, 0xa4eb, 0xa4ec, 0xa4ef, - 0xa4f2, 0xa4f3, 0xa5a2, 0xa5a3, 0xa5a4, 0xa5a6, 0xa5a7, 0xa5aa, 0xa5ad, 0xa5af, - 0xa5b0, 0xa5b3, 0xa5b5, 0xa5b7, 0xa5b8, 0xa5b9, 0xa5bf, 0xa5c3, 0xa5c6, 0xa5c7, - 0xa5c8, 0xa5c9, 0xa5cb, 0xa5d0, 0xa5d5, 0xa5d6, 0xa5d7, 0xa5de, 0xa5e0, 0xa5e1, - 0xa5e5, 0xa5e9, 0xa5ea, 0xa5eb, 0xa5ec, 0xa5ed, 0xa5f3, 0xb8a9, 0xb9d4, 0xbaee, - 0xbbc8, 0xbef0, 0xbfb7, 0xc4ea, 0xc6fc, 0xc7bd, 0xcab8, 0xcaf3, 0xcbdc, 0xcdd1 - ]; - - this.nextChar = eucNextChar; -}; -util.inherits(module.exports.euc_jp, mbcs); - - - -/** - * The charset recognize for EUC-KR. A singleton instance of this class - * is created and kept by the public CharsetDetector class - */ -module.exports.euc_kr = function() { - this.name = function() { - return 'EUC-KR'; - }; - this.language = function() { - return 'ko'; - }; - - // TODO: This set of data comes from the character frequency- - // of-occurence analysis tool. The data needs to be moved - // into a resource and loaded from there. - this.commonChars = [ - 0xb0a1, 0xb0b3, 0xb0c5, 0xb0cd, 0xb0d4, 0xb0e6, 0xb0ed, 0xb0f8, 0xb0fa, 0xb0fc, - 0xb1b8, 0xb1b9, 0xb1c7, 0xb1d7, 0xb1e2, 0xb3aa, 0xb3bb, 0xb4c2, 0xb4cf, 0xb4d9, - 0xb4eb, 0xb5a5, 0xb5b5, 0xb5bf, 0xb5c7, 0xb5e9, 0xb6f3, 0xb7af, 0xb7c2, 0xb7ce, - 0xb8a6, 0xb8ae, 0xb8b6, 0xb8b8, 0xb8bb, 0xb8e9, 0xb9ab, 0xb9ae, 0xb9cc, 0xb9ce, - 0xb9fd, 0xbab8, 0xbace, 0xbad0, 0xbaf1, 0xbbe7, 0xbbf3, 0xbbfd, 0xbcad, 0xbcba, - 0xbcd2, 0xbcf6, 0xbdba, 0xbdc0, 0xbdc3, 0xbdc5, 0xbec6, 0xbec8, 0xbedf, 0xbeee, - 0xbef8, 0xbefa, 0xbfa1, 0xbfa9, 0xbfc0, 0xbfe4, 0xbfeb, 0xbfec, 0xbff8, 0xc0a7, - 0xc0af, 0xc0b8, 0xc0ba, 0xc0bb, 0xc0bd, 0xc0c7, 0xc0cc, 0xc0ce, 0xc0cf, 0xc0d6, - 0xc0da, 0xc0e5, 0xc0fb, 0xc0fc, 0xc1a4, 0xc1a6, 0xc1b6, 0xc1d6, 0xc1df, 0xc1f6, - 0xc1f8, 0xc4a1, 0xc5cd, 0xc6ae, 0xc7cf, 0xc7d1, 0xc7d2, 0xc7d8, 0xc7e5, 0xc8ad - ]; - - this.nextChar = eucNextChar; -}; -util.inherits(module.exports.euc_kr, mbcs); - - - -/** - * GB-18030 recognizer. Uses simplified Chinese statistics. - */ -module.exports.gb_18030 = function() { - this.name = function() { - return 'GB18030'; - }; - this.language = function() { - return 'zh'; - }; - - /* - * Get the next character value for EUC based encodings. - * Character 'value' is simply the raw bytes that make up the character - * packed into an int. - */ - this.nextChar = function(iter, det) { - iter.index = iter.nextIndex; - iter.error = false; - var firstByte = 0; - var secondByte = 0; - var thirdByte = 0; - var fourthByte = 0; - buildChar: { - firstByte = iter.charValue = iter.nextByte(det); - if (firstByte < 0) { - // Ran off the end of the input data - iter.done = true; - break buildChar; - } - if (firstByte <= 0x80) { - // single byte char - break buildChar; - } - secondByte = iter.nextByte(det); - iter.charValue = (iter.charValue << 8) | secondByte; - if (firstByte >= 0x81 && firstByte <= 0xFE) { - // Two byte Char - if ((secondByte >= 0x40 && secondByte <= 0x7E) || (secondByte >=80 && secondByte <= 0xFE)) { - break buildChar; - } - // Four byte char - if (secondByte >= 0x30 && secondByte <= 0x39) { - thirdByte = iter.nextByte(det); - if (thirdByte >= 0x81 && thirdByte <= 0xFE) { - fourthByte = iter.nextByte(det); - if (fourthByte >= 0x30 && fourthByte <= 0x39) { - iter.charValue = (iter.charValue << 16) | (thirdByte << 8) | fourthByte; - break buildChar; - } - } - } - iter.error = true; - break buildChar; - } - } - return iter.done == false; - }; - - // TODO: This set of data comes from the character frequency- - // of-occurence analysis tool. The data needs to be moved - // into a resource and loaded from there. - this.commonChars = [ - 0xa1a1, 0xa1a2, 0xa1a3, 0xa1a4, 0xa1b0, 0xa1b1, 0xa1f1, 0xa1f3, 0xa3a1, 0xa3ac, - 0xa3ba, 0xb1a8, 0xb1b8, 0xb1be, 0xb2bb, 0xb3c9, 0xb3f6, 0xb4f3, 0xb5bd, 0xb5c4, - 0xb5e3, 0xb6af, 0xb6d4, 0xb6e0, 0xb7a2, 0xb7a8, 0xb7bd, 0xb7d6, 0xb7dd, 0xb8b4, - 0xb8df, 0xb8f6, 0xb9ab, 0xb9c9, 0xb9d8, 0xb9fa, 0xb9fd, 0xbacd, 0xbba7, 0xbbd6, - 0xbbe1, 0xbbfa, 0xbcbc, 0xbcdb, 0xbcfe, 0xbdcc, 0xbecd, 0xbedd, 0xbfb4, 0xbfc6, - 0xbfc9, 0xc0b4, 0xc0ed, 0xc1cb, 0xc2db, 0xc3c7, 0xc4dc, 0xc4ea, 0xc5cc, 0xc6f7, - 0xc7f8, 0xc8ab, 0xc8cb, 0xc8d5, 0xc8e7, 0xc9cf, 0xc9fa, 0xcab1, 0xcab5, 0xcac7, - 0xcad0, 0xcad6, 0xcaf5, 0xcafd, 0xccec, 0xcdf8, 0xceaa, 0xcec4, 0xced2, 0xcee5, - 0xcfb5, 0xcfc2, 0xcfd6, 0xd0c2, 0xd0c5, 0xd0d0, 0xd0d4, 0xd1a7, 0xd2aa, 0xd2b2, - 0xd2b5, 0xd2bb, 0xd2d4, 0xd3c3, 0xd3d0, 0xd3fd, 0xd4c2, 0xd4da, 0xd5e2, 0xd6d0 - ]; -}; -util.inherits(module.exports.gb_18030, mbcs); |