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Add ECI Mode Support

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imam 2021-11-02 04:37:29 +07:00
parent 65c12e9638
commit 12df65b9d6
1 changed files with 106 additions and 0 deletions
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106
js/sqrd.js
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@ -12,6 +12,49 @@
var result = {message:"",error:[]};
EXT_ENCODING = [
"ISO/IEC 8859-1 (Latin-1)",
"ISO/IEC 8859-1 (Latin-1)",
"ISO/IEC 8859-1 (Latin-1)",
"ISO/IEC 8859-1 (Latin-1)",
"ISO/IEC 8859-2 (Latin-2)",
"ISO/IEC 8859-3 (Latin-3)",
"ISO/IEC 8859-4 (Latin-4)",
"ISO/IEC 8859-5 (Latin/Cyrillic)",
"ISO/IEC 8859-6 (Latin/Arabic)",
"ISO/IEC 8859-7 (Latin/Greek)",
"ISO/IEC 8859-8 (Latin/Hebrew)",
"ISO/IEC 8859-9 (Latin-5)",
"ISO/IEC 8859-10 (Latin-6)",
"ISO/IEC 8859-11 (Latin/Thai)",
"",
"ISO/IEC 8859-13 (Latin-7)",
"ISO/IEC 8859-14 (Latin-8/Celtic)",
"ISO/IEC 8859-15 (Latin-9)",
"ISO/IEC 8859-16 (Latin-10)",
"",
"Shift JIS",
"Windows-1250",
"Windows-1251",
"Windows-1252",
"Windows-1256",
"UTF-16",
"UTF-8",
"US-ASCII",
"Big5",
"GB18030",
"EUC-KR"
]
function getExtendedEncoding(code){
if(code > EXT_ENCODING.length){
return EXT_ENCODING[0];
} else {
return EXT_ENCODING[code];
}
}
function hammingDistance(s1, s2){
if(s1.length != s1.length){
console.log("[ERROR]: inconsistent string lengths");
@ -430,6 +473,19 @@ function recoverPaddingBits(data_array){
var offset = character_count*13;
offset += 12;
} else if(encoding_mode == "0111"){
if(data_bits.substring(4,5) == "0"){
offset += 12;
} else if(data_bits.substring(4,6) == "10"){
offset += 20;
} else if(data_bits.substring(4,7) == "110"){
offset += 28;
} else {
return "ERROR: Invalid ECI Assignment Number";
}
} else if(encoding_mode == "0000"){
break;
} else {
@ -917,6 +973,40 @@ function QRDecode(data){
} else if(mode == 0b1000){
//TODO: Kanji mode
break;
} else if(mode == 0b0111){
// ECI Mode
result.mode.push("ECI Mode (0111)");
if(data_bits.substring(0,1) == "0"){
temp_data += "["+data_bits.substring(0, 8)+"]";
special_encoding = parseInt(data_bits.substring(0,8), 2);
data_bits = data_bits.substring(8);
result.count.push(special_encoding);
result.decoded.push(getExtendedEncoding(special_encoding));
} else if(data_bits.substring(0,2) == "10"){
temp_data += "["+data_bits.substring(0, 16)+"]";
special_encoding = parseInt(data_bits.substring(0,16), 2);
data_bits = data_bits.substring(16);
result.count.push(special_encoding);
result.decoded.push(getExtendedEncoding(special_encoding));
} else if(data_bits.substring(0,3) == "110"){
temp_data += "["+data_bits.substring(0, 24)+"]";
special_encoding = parseInt(data_bits.substring(0,24), 2);
data_bits = data_bits.substring(24);
result.count.push(special_encoding);
result.decoded.push(getExtendedEncoding(special_encoding));
} else {
console.log("[ERROR]: Invalid ECI Assignment Number");
result.error.push("[ERROR]: Invalid ECI Assignment Number");
break;
}
} else {
console.log("[ERROR]: Invalid Encoding mode", mode);
result.error.push("Invalid Encoding mode");
@ -1118,7 +1208,23 @@ function readDataBits(data_bits){
break;
} else if(mode == 0b1000){
//TODO: Kanji mode
console.log("Unsupported encoding: Kanji Mode");
break;
} else if(mode == 0b0111){
// ECI Mode
if(data_bits.substring(0,1) == "0"){
special_encoding = data_bits.substring(0,8);
data_bits = data_bits.substring(8);
} else if(data_bits.substring(0,2) == "10"){
special_encoding = data_bits.substring(0,16);
data_bits = data_bits.substring(16);
} else if(data_bits.substring(0,3) == "110"){
special_encoding = data_bits.substring(0,24);
data_bits = data_bits.substring(24);
} else {
console.log("[ERROR]: Invalid ECI Assignment Number");
break;
}
} else {
console.log("[ERROR]: Invalid Encoding mode");
break;