@zxing/library
Version:
TypeScript port of ZXing multi-format 1D/2D barcode image processing library.
1,041 lines (1,040 loc) • 53.5 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spread = (this && this.__spread) || function () {
for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MinimalEncoder = void 0;
var constants_1 = require("./constants");
var HighLevelEncoder_1 = require("./HighLevelEncoder");
var MinimalECIInput_1 = require("../../common/MinimalECIInput");
var Integer_1 = require("../../util/Integer");
var Mode;
(function (Mode) {
Mode[Mode["ASCII"] = 0] = "ASCII";
Mode[Mode["C40"] = 1] = "C40";
Mode[Mode["TEXT"] = 2] = "TEXT";
Mode[Mode["X12"] = 3] = "X12";
Mode[Mode["EDF"] = 4] = "EDF";
Mode[Mode["B256"] = 5] = "B256";
})(Mode || (Mode = {}));
var C40_SHIFT2_CHARS = [
'!',
'"',
'#',
'$',
'%',
'&',
"'",
'(',
')',
'*',
'+',
',',
'-',
'.',
'/',
':',
';',
'<',
'=',
'>',
'?',
'@',
'[',
'\\',
']',
'^',
'_',
];
var MinimalEncoder = /** @class */ (function () {
function MinimalEncoder() {
}
MinimalEncoder.isExtendedASCII = function (ch, fnc1) {
return ch !== fnc1 && ch >= 128 && ch <= 255;
};
MinimalEncoder.isInC40Shift1Set = function (ch) {
return ch <= 31;
};
MinimalEncoder.isInC40Shift2Set = function (ch, fnc1) {
var e_1, _a;
try {
for (var C40_SHIFT2_CHARS_1 = __values(C40_SHIFT2_CHARS), C40_SHIFT2_CHARS_1_1 = C40_SHIFT2_CHARS_1.next(); !C40_SHIFT2_CHARS_1_1.done; C40_SHIFT2_CHARS_1_1 = C40_SHIFT2_CHARS_1.next()) {
var c40Shift2Char = C40_SHIFT2_CHARS_1_1.value;
if (c40Shift2Char.charCodeAt(0) === ch) {
return true;
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (C40_SHIFT2_CHARS_1_1 && !C40_SHIFT2_CHARS_1_1.done && (_a = C40_SHIFT2_CHARS_1.return)) _a.call(C40_SHIFT2_CHARS_1);
}
finally { if (e_1) throw e_1.error; }
}
return ch === fnc1;
};
MinimalEncoder.isInTextShift1Set = function (ch) {
return this.isInC40Shift1Set(ch);
};
MinimalEncoder.isInTextShift2Set = function (ch, fnc1) {
return this.isInC40Shift2Set(ch, fnc1);
};
/**
* Performs message encoding of a DataMatrix message
*
* @param msg the message
* @param priorityCharset The preferred {@link Charset}. When the value of the argument is null, the algorithm
* chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
* charset to encode any character in the input that can be encoded by it if the charset is among the
* supported charsets.
* @param fnc1 denotes the character in the input that represents the FNC1 character or -1 if this is not a GS1
* bar code. If the value is not -1 then a FNC1 is also prepended.
* @param shape requested shape.
* @return the encoded message (the char values range from 0 to 255)
*/
MinimalEncoder.encodeHighLevel = function (msg, priorityCharset, fnc1, shape) {
if (priorityCharset === void 0) { priorityCharset = null; }
if (fnc1 === void 0) { fnc1 = -1; }
if (shape === void 0) { shape = 0 /* FORCE_NONE */; }
var macroId = 0;
if (msg.startsWith(constants_1.MACRO_05_HEADER) && msg.endsWith(constants_1.MACRO_TRAILER)) {
macroId = 5;
msg = msg.substring(constants_1.MACRO_05_HEADER.length, msg.length - 2);
}
else if (msg.startsWith(constants_1.MACRO_06_HEADER) && msg.endsWith(constants_1.MACRO_TRAILER)) {
macroId = 6;
msg = msg.substring(constants_1.MACRO_06_HEADER.length, msg.length - 2);
}
return decodeURIComponent(escape(String.fromCharCode.apply(String, __spread(this.encode(msg, priorityCharset, fnc1, shape, macroId)))));
};
/**
* Encodes input minimally and returns an array of the codewords
*
* @param input The string to encode
* @param priorityCharset The preferred {@link Charset}. When the value of the argument is null, the algorithm
* chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
* charset to encode any character in the input that can be encoded by it if the charset is among the
* supported charsets.
* @param fnc1 denotes the character in the input that represents the FNC1 character or -1 if this is not a GS1
* bar code. If the value is not -1 then a FNC1 is also prepended.
* @param shape requested shape.
* @param macroId Prepends the specified macro function in case that a value of 5 or 6 is specified.
* @return An array of bytes representing the codewords of a minimal encoding.
*/
MinimalEncoder.encode = function (input, priorityCharset, fnc1, shape, macroId) {
return this.encodeMinimally(new Input(input, priorityCharset, fnc1, shape, macroId)).getBytes();
};
MinimalEncoder.addEdge = function (edges, edge) {
var vertexIndex = edge.fromPosition + edge.characterLength;
if (edges[vertexIndex][edge.getEndMode()] === null ||
edges[vertexIndex][edge.getEndMode()].cachedTotalSize >
edge.cachedTotalSize) {
edges[vertexIndex][edge.getEndMode()] = edge;
}
};
/** @return the number of words in which the string starting at from can be encoded in c40 or text mode.
* The number of characters encoded is returned in characterLength.
* The number of characters encoded is also minimal in the sense that the algorithm stops as soon
* as a character encoding fills a C40 word competely (three C40 values). An exception is at the
* end of the string where two C40 values are allowed (according to the spec the third c40 value
* is filled with 0 (Shift 1) in this case).
*/
MinimalEncoder.getNumberOfC40Words = function (input, from, c40, characterLength) {
var thirdsCount = 0;
for (var i = from; i < input.length(); i++) {
if (input.isECI(i)) {
characterLength[0] = 0;
return 0;
}
var ci = input.charAt(i);
if ((c40 && HighLevelEncoder_1.default.isNativeC40(ci)) ||
(!c40 && HighLevelEncoder_1.default.isNativeText(ci))) {
thirdsCount++; // native
}
else if (!MinimalEncoder.isExtendedASCII(ci, input.getFNC1Character())) {
thirdsCount += 2; // shift
}
else {
var asciiValue = ci & 0xff;
if (asciiValue >= 128 &&
((c40 && HighLevelEncoder_1.default.isNativeC40(asciiValue - 128)) ||
(!c40 && HighLevelEncoder_1.default.isNativeText(asciiValue - 128)))) {
thirdsCount += 3; // shift, Upper shift
}
else {
thirdsCount += 4; // shift, Upper shift, shift
}
}
if (thirdsCount % 3 === 0 ||
((thirdsCount - 2) % 3 === 0 && i + 1 === input.length())) {
characterLength[0] = i - from + 1;
return Math.ceil(thirdsCount / 3.0);
}
}
characterLength[0] = 0;
return 0;
};
MinimalEncoder.addEdges = function (input, edges, from, previous) {
var e_2, _a;
if (input.isECI(from)) {
this.addEdge(edges, new Edge(input, Mode.ASCII, from, 1, previous));
return;
}
var ch = input.charAt(from);
if (previous === null || previous.getEndMode() !== Mode.EDF) {
// not possible to unlatch a full EDF edge to something
// else
if (HighLevelEncoder_1.default.isDigit(ch) &&
input.haveNCharacters(from, 2) &&
HighLevelEncoder_1.default.isDigit(input.charAt(from + 1))) {
// two digits ASCII encoded
this.addEdge(edges, new Edge(input, Mode.ASCII, from, 2, previous));
}
else {
// one ASCII encoded character or an extended character via Upper Shift
this.addEdge(edges, new Edge(input, Mode.ASCII, from, 1, previous));
}
var modes = [Mode.C40, Mode.TEXT];
try {
for (var modes_1 = __values(modes), modes_1_1 = modes_1.next(); !modes_1_1.done; modes_1_1 = modes_1.next()) {
var mode = modes_1_1.value;
var characterLength = [];
if (MinimalEncoder.getNumberOfC40Words(input, from, mode === Mode.C40, characterLength) > 0) {
this.addEdge(edges, new Edge(input, mode, from, characterLength[0], previous));
}
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (modes_1_1 && !modes_1_1.done && (_a = modes_1.return)) _a.call(modes_1);
}
finally { if (e_2) throw e_2.error; }
}
if (input.haveNCharacters(from, 3) &&
HighLevelEncoder_1.default.isNativeX12(input.charAt(from)) &&
HighLevelEncoder_1.default.isNativeX12(input.charAt(from + 1)) &&
HighLevelEncoder_1.default.isNativeX12(input.charAt(from + 2))) {
this.addEdge(edges, new Edge(input, Mode.X12, from, 3, previous));
}
this.addEdge(edges, new Edge(input, Mode.B256, from, 1, previous));
}
// We create 4 EDF edges, with 1, 2 3 or 4 characters length. The fourth normally doesn't have a latch to ASCII
// unless it is 2 characters away from the end of the input.
var i;
for (i = 0; i < 3; i++) {
var pos = from + i;
if (input.haveNCharacters(pos, 1) &&
HighLevelEncoder_1.default.isNativeEDIFACT(input.charAt(pos))) {
this.addEdge(edges, new Edge(input, Mode.EDF, from, i + 1, previous));
}
else {
break;
}
}
if (i === 3 &&
input.haveNCharacters(from, 4) &&
HighLevelEncoder_1.default.isNativeEDIFACT(input.charAt(from + 3))) {
this.addEdge(edges, new Edge(input, Mode.EDF, from, 4, previous));
}
};
MinimalEncoder.encodeMinimally = function (input) {
/* The minimal encoding is computed by Dijkstra. The acyclic graph is modeled as follows:
* A vertex represents a combination of a position in the input and an encoding mode where position 0
* denotes the position left of the first character, 1 the position left of the second character and so on.
* Likewise the end vertices are located after the last character at position input.length().
* For any position there might be up to six vertices, one for each of the encoding types ASCII, C40, TEXT, X12,
* EDF and B256.
*
* As an example consider the input string "ABC123" then at position 0 there is only one vertex with the default
* ASCII encodation. At position 3 there might be vertices for the types ASCII, C40, X12, EDF and B256.
*
* An edge leading to such a vertex encodes one or more of the characters left of the position that the vertex
* represents. It encodes the characters in the encoding mode of the vertex that it ends on. In other words,
* all edges leading to a particular vertex encode the same characters (the length of the suffix can vary) using the same
* encoding mode.
* As an example consider the input string "ABC123" and the vertex (4,EDF). Possible edges leading to this vertex
* are:
* (0,ASCII) --EDF(ABC1)--> (4,EDF)
* (1,ASCII) --EDF(BC1)--> (4,EDF)
* (1,B256) --EDF(BC1)--> (4,EDF)
* (1,EDF) --EDF(BC1)--> (4,EDF)
* (2,ASCII) --EDF(C1)--> (4,EDF)
* (2,B256) --EDF(C1)--> (4,EDF)
* (2,EDF) --EDF(C1)--> (4,EDF)
* (3,ASCII) --EDF(1)--> (4,EDF)
* (3,B256) --EDF(1)--> (4,EDF)
* (3,EDF) --EDF(1)--> (4,EDF)
* (3,C40) --EDF(1)--> (4,EDF)
* (3,X12) --EDF(1)--> (4,EDF)
*
* The edges leading to a vertex are stored in such a way that there is a fast way to enumerate the edges ending
* on a particular vertex.
*
* The algorithm processes the vertices in order of their position thereby performing the following:
*
* For every vertex at position i the algorithm enumerates the edges ending on the vertex and removes all but the
* shortest from that list.
* Then it processes the vertices for the position i+1. If i+1 == input.length() then the algorithm ends
* and chooses the the edge with the smallest size from any of the edges leading to vertices at this position.
* Otherwise the algorithm computes all possible outgoing edges for the vertices at the position i+1
*
* Examples:
* The process is illustrated by showing the graph (edges) after each iteration from left to right over the input:
* An edge is drawn as follows "(" + fromVertex + ") -- " + encodingMode + "(" + encodedInput + ") (" +
* accumulatedSize + ") --> (" + toVertex + ")"
*
* Example 1 encoding the string "ABCDEFG":
*
*
* Situation after adding edges to the start vertex (0,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
*
* Situation after adding edges to vertices at position 1
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) B256(B) (4) --> (2,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BC) (5) --> (3,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCD) (5) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) ASCII(B) (4) --> (2,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BC) (6) --> (3,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) C40(BCD) (5) --> (4,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) TEXT(BCD) (7) --> (4,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) X12(BCD) (5) --> (4,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCDE) (6) --> (5,EDF)
*
* Edge "(1,ASCII) ASCII(B) (2) --> (2,ASCII)" is minimal for the vertex (2,ASCII) so that edge "(1,B256) ASCII(B) (4) --> (2,ASCII)" is removed.
* Edge "(1,B256) B256(B) (3) --> (2,B256)" is minimal for the vertext (2,B256) so that the edge "(1,ASCII) B256(B) (4) --> (2,B256)" is removed.
*
* Situation after adding edges to vertices at position 2
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BC) (5) --> (3,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCD) (5) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BC) (6) --> (3,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) C40(BCD) (5) --> (4,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) TEXT(BCD) (7) --> (4,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) X12(BCD) (5) --> (4,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCDE) (6) --> (5,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) ASCII(C) (5) --> (3,ASCII)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) B256(C) (6) --> (3,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CD) (7) --> (4,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) C40(CDE) (6) --> (5,C40)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) TEXT(CDE) (8) --> (5,TEXT)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) X12(CDE) (6) --> (5,X12)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CDE) (7) --> (5,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CDEF) (7) --> (6,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) B256(C) (5) --> (3,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CD) (6) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) C40(CDE) (5) --> (5,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) X12(CDE) (5) --> (5,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDE) (6) --> (5,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDEF) (6) --> (6,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) ASCII(C) (4) --> (3,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) C40(CDE) (5) --> (5,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) X12(CDE) (5) --> (5,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CDE) (6) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CDEF) (6) --> (6,EDF)
*
* Edge "(2,ASCII) ASCII(C) (3) --> (3,ASCII)" is minimal for the vertex (3,ASCII) so that edges "(2,EDF) ASCII(C) (5) --> (3,ASCII)"
* and "(2,B256) ASCII(C) (4) --> (3,ASCII)" can be removed.
* Edge "(0,ASCII) EDF(ABC) (4) --> (3,EDF)" is minimal for the vertex (3,EDF) so that edges "(1,ASCII) EDF(BC) (5) --> (3,EDF)"
* and "(1,B256) EDF(BC) (6) --> (3,EDF)" can be removed.
* Edge "(2,B256) B256(C) (4) --> (3,B256)" is minimal for the vertex (3,B256) so that edges "(2,ASCII) B256(C) (5) --> (3,B256)"
* and "(2,EDF) B256(C) (6) --> (3,B256)" can be removed.
*
* This continues for vertices 3 thru 7
*
* Situation after adding edges to vertices at position 7
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) C40(ABC) (3) --> (3,C40) C40(DEF) (5) --> (6,C40)
* (0,ASCII) X12(ABC) (3) --> (3,X12) X12(DEF) (5) --> (6,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) C40(CDE) (5) --> (5,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) X12(CDE) (5) --> (5,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDEF) (6) --> (6,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40) C40(EFG) (6) --> (7,C40) //Solution 1
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12) X12(EFG) (6) --> (7,X12) //Solution 2
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) TEXT(DEF) (8) --> (6,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) EDF(DEFG) (7) --> (7,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) TEXT(EFG) (9) --> (7,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII) ASCII(F) (6) --> (6,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256) B256(F) (7) --> (6,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII) ASCII(F) (6) --> (6,ASCII) ASCII(G) (7) --> (7,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256) B256(F) (7) --> (6,B256) B256(G) (8) --> (7,B256)
*
* Hence a minimal encoding of "ABCDEFG" is either ASCII(A),C40(BCDEFG) or ASCII(A), X12(BCDEFG) with a size of 5 bytes.
*/
var inputLength = input.length();
// Array that represents vertices. There is a vertex for every character and mode.
// The last dimension in the array below encodes the 6 modes ASCII, C40, TEXT, X12, EDF and B256
var edges = Array(inputLength + 1)
.fill(null)
.map(function () { return Array(6).fill(0); });
this.addEdges(input, edges, 0, null);
for (var i = 1; i <= inputLength; i++) {
for (var j = 0; j < 6; j++) {
if (edges[i][j] !== null && i < inputLength) {
this.addEdges(input, edges, i, edges[i][j]);
}
}
// optimize memory by removing edges that have been passed.
for (var j = 0; j < 6; j++) {
edges[i - 1][j] = null;
}
}
var minimalJ = -1;
var minimalSize = Integer_1.default.MAX_VALUE;
for (var j = 0; j < 6; j++) {
if (edges[inputLength][j] !== null) {
var edge = edges[inputLength][j];
var size = j >= 1 && j <= 3 ? edge.cachedTotalSize + 1 : edge.cachedTotalSize; // C40, TEXT and X12 need an
// extra unlatch at the end
if (size < minimalSize) {
minimalSize = size;
minimalJ = j;
}
}
}
if (minimalJ < 0) {
throw new Error('Failed to encode "' + input + '"');
}
return new Result(edges[inputLength][minimalJ]);
};
return MinimalEncoder;
}());
exports.MinimalEncoder = MinimalEncoder;
var Result = /** @class */ (function () {
function Result(solution) {
var input = solution.input;
var size = 0;
var bytesAL = [];
var randomizePostfixLength = [];
var randomizeLengths = [];
if ((solution.mode === Mode.C40 ||
solution.mode === Mode.TEXT ||
solution.mode === Mode.X12) &&
solution.getEndMode() !== Mode.ASCII) {
size += this.prepend(Edge.getBytes(254), bytesAL);
}
var current = solution;
while (current !== null) {
size += this.prepend(current.getDataBytes(), bytesAL);
if (current.previous === null ||
current.getPreviousStartMode() !== current.getMode()) {
if (current.getMode() === Mode.B256) {
if (size <= 249) {
bytesAL.unshift(size);
size++;
}
else {
bytesAL.unshift(size % 250);
bytesAL.unshift(size / 250 + 249);
size += 2;
}
randomizePostfixLength.push(bytesAL.length);
randomizeLengths.push(size);
}
this.prepend(current.getLatchBytes(), bytesAL);
size = 0;
}
current = current.previous;
}
if (input.getMacroId() === 5) {
size += this.prepend(Edge.getBytes(236), bytesAL);
}
else if (input.getMacroId() === 6) {
size += this.prepend(Edge.getBytes(237), bytesAL);
}
if (input.getFNC1Character() > 0) {
size += this.prepend(Edge.getBytes(232), bytesAL);
}
for (var i = 0; i < randomizePostfixLength.length; i++) {
this.applyRandomPattern(bytesAL, bytesAL.length - randomizePostfixLength[i], randomizeLengths[i]);
}
// add padding
var capacity = solution.getMinSymbolSize(bytesAL.length);
if (bytesAL.length < capacity) {
bytesAL.push(129);
}
while (bytesAL.length < capacity) {
bytesAL.push(this.randomize253State(bytesAL.length + 1));
}
this.bytes = new Uint8Array(bytesAL.length);
for (var i = 0; i < this.bytes.length; i++) {
this.bytes[i] = bytesAL[i];
}
}
Result.prototype.prepend = function (bytes, into) {
for (var i = bytes.length - 1; i >= 0; i--) {
into.unshift(bytes[i]);
}
return bytes.length;
};
Result.prototype.randomize253State = function (codewordPosition) {
var pseudoRandom = ((149 * codewordPosition) % 253) + 1;
var tempVariable = 129 + pseudoRandom;
return tempVariable <= 254 ? tempVariable : tempVariable - 254;
};
Result.prototype.applyRandomPattern = function (bytesAL, startPosition, length) {
for (var i = 0; i < length; i++) {
// See "B.1 253-state algorithm
var Pad_codeword_position = startPosition + i;
var Pad_codeword_value = bytesAL[Pad_codeword_position] & 0xff;
var pseudo_random_number = ((149 * (Pad_codeword_position + 1)) % 255) + 1;
var temp_variable = Pad_codeword_value + pseudo_random_number;
bytesAL[Pad_codeword_position] =
temp_variable <= 255 ? temp_variable : temp_variable - 256;
}
};
Result.prototype.getBytes = function () {
return this.bytes;
};
return Result;
}());
var Edge = /** @class */ (function () {
function Edge(input, mode, fromPosition, characterLength, previous) {
this.input = input;
this.mode = mode;
this.fromPosition = fromPosition;
this.characterLength = characterLength;
this.previous = previous;
this.allCodewordCapacities = [
3, 5, 8, 10, 12, 16, 18, 22, 30, 32, 36, 44, 49, 62, 86, 114, 144, 174, 204,
280, 368, 456, 576, 696, 816, 1050, 1304, 1558,
];
this.squareCodewordCapacities = [
3, 5, 8, 12, 18, 22, 30, 36, 44, 62, 86, 114, 144, 174, 204, 280, 368, 456,
576, 696, 816, 1050, 1304, 1558,
];
this.rectangularCodewordCapacities = [5, 10, 16, 33, 32, 49];
if (!(fromPosition + characterLength <= input.length())) {
throw new Error('Invalid edge');
}
var size = previous !== null ? previous.cachedTotalSize : 0;
var previousMode = this.getPreviousMode();
/*
* Switching modes
* ASCII -> C40: latch 230
* ASCII -> TEXT: latch 239
* ASCII -> X12: latch 238
* ASCII -> EDF: latch 240
* ASCII -> B256: latch 231
* C40 -> ASCII: word(c1,c2,c3), 254
* TEXT -> ASCII: word(c1,c2,c3), 254
* X12 -> ASCII: word(c1,c2,c3), 254
* EDIFACT -> ASCII: Unlatch character,0,0,0 or c1,Unlatch character,0,0 or c1,c2,Unlatch character,0 or
* c1,c2,c3,Unlatch character
* B256 -> ASCII: without latch after n bytes
*/
switch (mode) {
case Mode.ASCII:
size++;
if (input.isECI(fromPosition) ||
MinimalEncoder.isExtendedASCII(input.charAt(fromPosition), input.getFNC1Character())) {
size++;
}
if (previousMode === Mode.C40 ||
previousMode === Mode.TEXT ||
previousMode === Mode.X12) {
size++; // unlatch 254 to ASCII
}
break;
case Mode.B256:
size++;
if (previousMode !== Mode.B256) {
size++; // byte count
}
else if (this.getB256Size() === 250) {
size++; // extra byte count
}
if (previousMode === Mode.ASCII) {
size++; // latch to B256
}
else if (previousMode === Mode.C40 ||
previousMode === Mode.TEXT ||
previousMode === Mode.X12) {
size += 2; // unlatch to ASCII, latch to B256
}
break;
case Mode.C40:
case Mode.TEXT:
case Mode.X12:
if (mode === Mode.X12) {
size += 2;
}
else {
var charLen = [];
size +=
MinimalEncoder.getNumberOfC40Words(input, fromPosition, mode === Mode.C40, charLen) * 2;
}
if (previousMode === Mode.ASCII || previousMode === Mode.B256) {
size++; // additional byte for latch from ASCII to this mode
}
else if (previousMode !== mode &&
(previousMode === Mode.C40 ||
previousMode === Mode.TEXT ||
previousMode === Mode.X12)) {
size += 2; // unlatch 254 to ASCII followed by latch to this mode
}
break;
case Mode.EDF:
size += 3;
if (previousMode === Mode.ASCII || previousMode === Mode.B256) {
size++; // additional byte for latch from ASCII to this mode
}
else if (previousMode === Mode.C40 ||
previousMode === Mode.TEXT ||
previousMode === Mode.X12) {
size += 2; // unlatch 254 to ASCII followed by latch to this mode
}
break;
}
this.cachedTotalSize = size;
}
// does not count beyond 250
Edge.prototype.getB256Size = function () {
var cnt = 0;
var current = this;
while (current !== null && current.mode === Mode.B256 && cnt <= 250) {
cnt++;
current = current.previous;
}
return cnt;
};
Edge.prototype.getPreviousStartMode = function () {
return this.previous === null ? Mode.ASCII : this.previous.mode;
};
Edge.prototype.getPreviousMode = function () {
return this.previous === null ? Mode.ASCII : this.previous.getEndMode();
};
/** Returns Mode.ASCII in case that:
* - Mode is EDIFACT and characterLength is less than 4 or the remaining characters can be encoded in at most 2
* ASCII bytes.
* - Mode is C40, TEXT or X12 and the remaining characters can be encoded in at most 1 ASCII byte.
* Returns mode in all other cases.
* */
Edge.prototype.getEndMode = function () {
if (this.mode === Mode.EDF) {
if (this.characterLength < 4) {
return Mode.ASCII;
}
var lastASCII = this.getLastASCII(); // see 5.2.8.2 EDIFACT encodation Rules
if (lastASCII > 0 &&
this.getCodewordsRemaining(this.cachedTotalSize + lastASCII) <=
2 - lastASCII) {
return Mode.ASCII;
}
}
if (this.mode === Mode.C40 ||
this.mode === Mode.TEXT ||
this.mode === Mode.X12) {
// see 5.2.5.2 C40 encodation rules and 5.2.7.2 ANSI X12 encodation rules
if (this.fromPosition + this.characterLength >= this.input.length() &&
this.getCodewordsRemaining(this.cachedTotalSize) === 0) {
return Mode.ASCII;
}
var lastASCII = this.getLastASCII();
if (lastASCII === 1 &&
this.getCodewordsRemaining(this.cachedTotalSize + 1) === 0) {
return Mode.ASCII;
}
}
return this.mode;
};
Edge.prototype.getMode = function () {
return this.mode;
};
/** Peeks ahead and returns 1 if the postfix consists of exactly two digits, 2 if the postfix consists of exactly
* two consecutive digits and a non extended character or of 4 digits.
* Returns 0 in any other case
**/
Edge.prototype.getLastASCII = function () {
var length = this.input.length();
var from = this.fromPosition + this.characterLength;
if (length - from > 4 || from >= length) {
return 0;
}
if (length - from === 1) {
if (MinimalEncoder.isExtendedASCII(this.input.charAt(from), this.input.getFNC1Character())) {
return 0;
}
return 1;
}
if (length - from === 2) {
if (MinimalEncoder.isExtendedASCII(this.input.charAt(from), this.input.getFNC1Character()) ||
MinimalEncoder.isExtendedASCII(this.input.charAt(from + 1), this.input.getFNC1Character())) {
return 0;
}
if (HighLevelEncoder_1.default.isDigit(this.input.charAt(from)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 1))) {
return 1;
}
return 2;
}
if (length - from === 3) {
if (HighLevelEncoder_1.default.isDigit(this.input.charAt(from)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 1)) &&
!MinimalEncoder.isExtendedASCII(this.input.charAt(from + 2), this.input.getFNC1Character())) {
return 2;
}
if (HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 1)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 2)) &&
!MinimalEncoder.isExtendedASCII(this.input.charAt(from), this.input.getFNC1Character())) {
return 2;
}
return 0;
}
if (HighLevelEncoder_1.default.isDigit(this.input.charAt(from)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 1)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 2)) &&
HighLevelEncoder_1.default.isDigit(this.input.charAt(from + 3))) {
return 2;
}
return 0;
};
/** Returns the capacity in codewords of the smallest symbol that has enough capacity to fit the given minimal
* number of codewords.
**/
Edge.prototype.getMinSymbolSize = function (minimum) {
var e_3, _a, e_4, _b, e_5, _c;
switch (this.input.getShapeHint()) {
case 1 /* FORCE_SQUARE */:
try {
for (var _d = __values(this.squareCodewordCapacities), _e = _d.next(); !_e.done; _e = _d.next()) {
var capacity = _e.value;
if (capacity >= minimum) {
return capacity;
}
}
}
catch (e_3_1) { e_3 = { error: e_3_1 }; }
finally {
try {
if (_e && !_e.done && (_a = _d.return)) _a.call(_d);
}
finally { if (e_3) throw e_3.error; }
}
break;
case 2 /* FORCE_RECTANGLE */:
try {
for (var _f = __values(this.rectangularCodewordCapacities), _g = _f.next(); !_g.done; _g = _f.next()) {
var capacity = _g.value;
if (capacity >= minimum) {
return capacity;
}
}
}
catch (e_4_1) { e_4 = { error: e_4_1 }; }
finally {
try {
if (_g && !_g.done && (_b = _f.return)) _b.call(_f);
}
finally { if (e_4) throw e_4.error; }
}
break;
}
try {
for (var _h = __values(this.allCodewordCapacities), _j = _h.next(); !_j.done; _j = _h.next()) {
var capacity = _j.value;
if (capacity >= minimum) {
return capacity;
}
}
}
catch (e_5_1) { e_5 = { error: e_5_1 }; }
finally {
try {
if (_j && !_j.done && (_c = _h.return)) _c.call(_h);
}
finally { if (e_5) throw e_5.error; }
}
return this.allCodewordCapacities[this.allCodewordCapacities.length - 1];
};
/** Returns the remaining capacity in codewords of the smallest symbol that has enough capacity to fit the given
* minimal number of codewords.
**/
Edge.prototype.getCodewordsRemaining = function (minimum) {
return this.getMinSymbolSize(minimum) - minimum;
};
Edge.getBytes = function (c1, c2) {
var result = new Uint8Array(c2 ? 2 : 1);
result[0] = c1;
if (c2) {
result[1] = c2;
}
return result;
};
Edge.prototype.setC40Word = function (bytes, offset, c1, c2, c3) {
var val16 = 1600 * (c1 & 0xff) + 40 * (c2 & 0xff) + (c3 & 0xff) + 1;
bytes[offset] = val16 / 256;
bytes[offset + 1] = val16 % 256;
};
Edge.prototype.getX12Value = function (c) {
return c === 13
? 0
: c === 42
? 1
: c === 62
? 2
: c === 32
? 3
: c >= 48 && c <= 57
? c - 44
: c >= 65 && c <= 90
? c - 51
: c;
};
Edge.prototype.getX12Words = function () {
if (!(this.characterLength % 3 === 0)) {
throw new Error('X12 words must be a multiple of 3');
}
var result = new Uint8Array((this.characterLength / 3) * 2);
for (var i = 0; i < result.length; i += 2) {
this.setC40Word(result, i, this.getX12Value(this.input.charAt(this.fromPosition + (i / 2) * 3)), this.getX12Value(this.input.charAt(this.fromPosition + (i / 2) * 3 + 1)), this.getX12Value(this.input.charAt(this.fromPosition + (i / 2) * 3 + 2)));
}
return result;
};
Edge.prototype.getShiftValue = function (c, c40, fnc1) {
return (c40 && MinimalEncoder.isInC40Shift1Set(c)) ||
(!c40 && MinimalEncoder.isInTextShift1Set(c))
? 0
: (c40 && MinimalEncoder.isInC40Shift2Set(c, fnc1)) ||
(!c40 && MinimalEncoder.isInTextShift2Set(c, fnc1))
? 1
: 2;
};
Edge.prototype.getC40Value = function (c40, setIndex, c, fnc1) {
if (c === fnc1) {
if (!(setIndex === 2)) {
throw new Error('FNC1 cannot be used in C40 shift 2');
}
return 27;
}
if (c40) {
return c <= 31
? c
: c === 32
? 3
: c <= 47
? c - 33
: c <= 57
? c - 44
: c <= 64
? c - 43
: c <= 90
? c - 51
: c <= 95
? c - 69
: c <= 127
? c - 96
: c;
}
else {
return c === 0
? 0
: setIndex === 0 && c <= 3
? c - 1 // is this a bug in the spec?
: setIndex === 1 && c <= 31
? c
: c === 32
? 3
: c >= 33 && c <= 47
? c - 33
: c >= 48 && c <= 57
? c - 44
: c >= 58 && c <= 64
? c - 43
: c >= 65 && c <= 90
? c - 64
: c >= 91 && c <= 95
? c - 69
: c === 96
? 0
: c >= 97 && c <= 122
? c - 83
: c >= 123 && c <= 127
? c - 96
: c;
}
};
Edge.prototype.getC40Words = function (c40, fnc1) {
var c40Values = [];
for (var i = 0; i < this.characterLength; i++) {
var ci = this.input.charAt(this.fromPosition + i);
if ((c40 && HighLevelEncoder_1.default.isNativeC40(ci)) ||
(!c40 && HighLevelEncoder_1.default.isNativeText(ci))) {
c40Values.push(this.getC40Value(c40, 0, ci, fnc1));
}
else if (!MinimalEncoder.isExtendedASCII(ci, fnc1)) {
var shiftValue = this.getShiftValue(ci, c40, fnc1);
c40Values.push(shiftValue); // Shift[123]
c40Values.push(this.getC40Value(c40, shiftValue, ci, fnc1));
}
else {
var asciiValue = (ci & 0xff) - 128;
if ((c40 && HighLevelEncoder_1.default.isNativeC40(asciiValue)) ||
(!c40 && HighLevelEncoder_1.default.isNativeText(asciiValue))) {
c40Values.push(1); // Shift 2
c40Values.push(30); // Upper Shift
c40Values.push(this.getC40Value(c40, 0, asciiValue, fnc1));
}
else {
c40Values.push(1); // Shift 2
c40Values.push(30); // Upper Shift
var shiftValue = this.getShiftValue(asciiValue, c40, fnc1);
c40Values.push(shiftValue); // Shift[123]
c40Values.push(this.getC40Value(c40, shiftValue, asciiValue, fnc1));
}
}
}
if (c40Values.length % 3 !== 0) {
if (!((c40Values.length - 2) % 3 === 0 &&
this.fromPosition + this.characterLength === this.input.length())) {
throw new Error('C40 words must be a multiple of 3');
}
c40Values.push(0); // pad with 0 (Shift 1)
}
var result = new Uint8Array((c40Values.length / 3) * 2);
var byteIndex = 0;
for (var i = 0; i < c40Values.length; i += 3) {
this.setC40Word(result, byteIndex, c40Values[i] & 0xff, c40Values[i + 1] & 0xff, c40Values[i + 2] & 0xff);
byteIndex += 2;
}
return result;
};
Edge.prototype.getEDFBytes = function () {
var numberOfThirds = Math.ceil(this.characterLength / 4.0);
var result = new Uint8Array(numberOfThirds * 3);
var pos = this.fromPosition;
var endPos = Math.min(this.fromPosition + this.characterLength - 1, this.input.length() - 1);
for (var i = 0; i < numberOfThirds; i += 3) {
var edfValues = [];
for (var j = 0; j < 4; j++) {
if (pos <= endPos) {
edfValues[j] = this.input.charAt(pos++) & 0x3f;
}
else {
edfValues[j] = pos === endPos + 1 ? 0x1f : 0;
}
}
var val24 = edfValues[0] << 18;
val24 |= edfValues[1] << 12;
val24 |= edfValues[2] << 6;
val24 |= edfValues[3];
result[i] = (val24 >> 16) & 0xff;
result[i + 1] = (val24 >> 8) & 0xff;
result[i + 2] = val24 & 0xff;
}
return result;
};
Edge.prototype.getLatchBytes = function () {
switch (this.getPreviousMode()) {
case Mode.ASCII:
case Mode.B256: // after B256 ends (via length) we are back to ASCII
switch (this.mode) {
case Mode.B256:
return Edge.getBytes(231);
case Mode.C40:
return Edge.getBytes(230);
case Mode.TEXT:
return Edge.getBytes(239);