sheetjs/js-codepage
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js-codepage/cputils.js
SheetJS 457f8ab8ab version bump 1.3.4: more codepages 
- added codepage 21027 (generated from NLS)
- unicode decoders skip BOM
- codepage command line tool -B writes bom
- version number added to scripts
- codepages 1257/1258 added to cpexcel
2014-07-13 04:30:13 -04:00

519 lines
19 KiB
JavaScript
Raw Blame History

/* cputils.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
/*jshint newcap: false */
(function(root, factory){
"use strict";
if(typeof cptable === "undefined") {
if(typeof require !== "undefined"){
var cpt = require('./cpt' + 'able');
if (typeof module !== 'undefined' && module.exports) module.exports = factory(cpt);
else root.cptable = factory(cpt);
} else throw new Error("cptable not found");
} else cptable = factory(cptable);
}(this, function(cpt){
"use strict";
var magic = {
"1200":"utf16le",
"1201":"utf16be",
"12000":"utf32le",
"12001":"utf32be",
"16969":"utf64le",
"20127":"ascii",
"65000":"utf7",
"65001":"utf8"
};
var sbcs_cache = [874,1250,1251,1252,1253,1254,1255,1256,10000];
var dbcs_cache = [932,936,949,950];
var magic_cache = [65001];
var magic_decode = {};
var magic_encode = {};
var cpecache = {};
var cpdcache = {};
var sfcc = function sfcc(x) { return String.fromCharCode(x); };
var cca = function cca(x){ return x.charCodeAt(0); };
if(typeof Buffer !== 'undefined') {
var mdl = 1024, mdb = new Buffer(mdl);
var make_EE = function make_EE(E){
var EE = new Buffer(65536);
for(var i = 0; i < 65536;++i) EE[i] = 0;
var keys = Object.keys(E), len = keys.length;
for(var ee = 0, e = keys[ee]; ee < len; ++ee) {
if(!(e = keys[ee])) continue;
EE[e.charCodeAt(0)] = E[e];
}
return EE;
};
var sbcs_encode = function make_sbcs_encode(cp) {
var EE = make_EE(cpt[cp].enc);
return function sbcs_e(data, ofmt) {
var len = data.length;
var out, i, j, D, w;
if(typeof data === 'string') {
out = Buffer(len);
for(i = 0; i < len; ++i) out[i] = EE[data.charCodeAt(i)];
} else if(Buffer.isBuffer(data)) {
out = Buffer(2*len);
j = 0;
for(i = 0; i < len; ++i) {
D = data[i];
if(D < 128) out[j++] = EE[D];
else if(D < 224) { out[j++] = EE[((D&31)<<6)+(data[i+1]&63)]; ++i; }
else if(D < 240) { out[j++] = EE[((D&15)<<12)+((data[i+1]&63)<<6)+(data[i+2]&63)]; i+=2; }
else {
w = ((D&7)<<18)+((data[i+1]&63)<<12)+((data[i+2]&63)<<6)+(data[i+3]&63); i+=3;
if(w < 65536) out[j++] = EE[w];
else { w -= 65536; out[j++] = EE[0xD800 + ((w>>10)&1023)]; out[j++] = EE[0xDC00 + (w&1023)]; }
}
}
out.length = j;
} else {
out = Buffer(len);
for(i = 0; i < len; ++i) out[i] = EE[data[i].charCodeAt(0)];
}
if(ofmt === undefined || ofmt === 'buf') return out;
if(ofmt !== 'arr') return out.toString('binary');
return [].slice.call(out);
};
};
var sbcs_decode = function make_sbcs_decode(cp) {
var D = cpt[cp].dec;
var DD = new Buffer(131072), d=0, c;
for(d=0;d<D.length;++d) {
if(!(c=D[d])) continue;
var w = c.charCodeAt(0);
DD[2*d] = w&255; DD[2*d+1] = w>>8;
}
return function sbcs_d(data) {
var len = data.length, i=0, j;
if(2 * len > mdl) { mdl = 2 * len; mdb = new Buffer(mdl); }
if(Buffer.isBuffer(data)) {
for(i = 0; i < len; i++) {
j = 2*data[i];
mdb[2*i] = DD[j]; mdb[2*i+1] = DD[j+1];
}
} else if(typeof data === "string") {
for(i = 0; i < len; i++) {
j = 2*data.charCodeAt(i);
mdb[2*i] = DD[j]; mdb[2*i+1] = DD[j+1];
}
} else {
for(i = 0; i < len; i++) {
j = 2*data[i];
mdb[2*i] = DD[j]; mdb[2*i+1] = DD[j+1];
}
}
mdb.length = 2 * len;
return mdb.toString('ucs2');
};
};
var dbcs_encode = function make_dbcs_encode(cp) {
var E = cpt[cp].enc;
var EE = new Buffer(131072);
for(var i = 0; i < 131072; ++i) EE[i] = 0;
var keys = Object.keys(E);
for(var ee = 0, e = keys[ee]; ee < keys.length; ++ee) {
if(!(e = keys[ee])) continue;
var f = e.charCodeAt(0);
EE[2*f] = E[e] & 255; EE[2*f+1] = E[e]>>8;
}
return function dbcs_e(data, ofmt) {
var len = data.length, out = new Buffer(2*len), i, j, jj, k, D;
if(typeof data === 'string') {
for(i = k = 0; i < len; ++i) {
j = data.charCodeAt(i)*2;
out[k++] = EE[j+1] || EE[j]; if(EE[j+1] > 0) out[k++] = EE[j];
}
out.length = k;
} else if(Buffer.isBuffer(data)) {
for(i = k = 0; i < len; ++i) {
D = data[i];
if(D < 128) j = D;
else if(D < 224) { j = ((D&31)<<6)+(data[i+1]&63); ++i; }
else if(D < 240) { j = ((D&15)<<12)+((data[i+1]&63)<<6)+(data[i+2]&63); i+=2; }
else { j = ((D&7)<<18)+((data[i+1]&63)<<12)+((data[i+2]&63)<<6)+(data[i+3]&63); i+=3; }
if(j<65536) { j*=2; out[k++] = EE[j+1] || EE[j]; if(EE[j+1] > 0) out[k++] = EE[j]; }
else { jj = j-65536;
j=2*(0xD800 + ((jj>>10)&1023)); out[k++] = EE[j+1] || EE[j]; if(EE[j+1] > 0) out[k++] = EE[j];
j=2*(0xDC00 + (jj&1023)); out[k++] = EE[j+1] || EE[j]; if(EE[j+1] > 0) out[k++] = EE[j];
}
}
out.length = k;
} else {
for(i = k = 0; i < len; i++) {
j = data[i].charCodeAt(0)*2;
out[k++] = EE[j+1] || EE[j]; if(EE[j+1] > 0) out[k++] = EE[j];
}
}
if(ofmt === undefined || ofmt === 'buf') return out;
if(ofmt !== 'arr') return out.toString('binary');
return [].slice.call(out);
};
};
var dbcs_decode = function make_dbcs_decode(cp) {
var D = cpt[cp].dec;
var DD = new Buffer(131072), d=0, c, w=0, j=0, i=0;
for(i = 0; i < 65536; ++i) { DD[2*i] = 0xFF; DD[2*i+1] = 0xFD;}
for(d = 0; d < D.length; ++d) {
if(!(c=D[d])) continue;
w = c.charCodeAt(0);
j = 2*d;
DD[j] = w&255; DD[j+1] = w>>8;
}
return function dbcs_d(data) {
var len = data.length, out = new Buffer(2*len), i, j, k=0;
if(Buffer.isBuffer(data)) {
for(i = 0; i < len; i++) {
j = 2*data[i];
if(DD[j]===0xFF && DD[j+1]===0xFD) { j=2*((data[i]<<8)+data[i+1]); ++i; }
out[k++] = DD[j]; out[k++] = DD[j+1];
}
} else if(typeof data === "string") {
for(i = 0; i < len; i++) {
j = 2*data.charCodeAt(i);
if(DD[j]===0xFF && DD[j+1]===0xFD) { j=2*((data.charCodeAt(i)<<8)+data.charCodeAt(i+1)); ++i; }
out[k++] = DD[j]; out[k++] = DD[j+1];
}
} else {
for(i = 0; i < len; i++) {
j = 2*data[i];
if(DD[j]===0xFF && DD[j+1]===0xFD) { j=2*((data[i]<<8)+data[i+1]); ++i; }
out[k++] = DD[j]; out[k++] = DD[j+1];
}
}
out.length = k;
return out.toString('ucs2');
};
};
magic_decode[65001] = function utf8_d(data) {
var len = data.length, w = 0, ww = 0;
if(4 * len > mdl) { mdl = 4 * len; mdb = new Buffer(mdl); }
mdb.length = 0;
var i = 0;
if(len >= 3 && data[0] == 0xEF) if(data[1] == 0xBB && data[2] == 0xBF) i = 3;
for(var j = 1, k = 0, D = 0; i < len; i+=j) {
j = 1; D = data[i];
if(D < 128) w = D;
else if(D < 224) { w=(D&31)*64+(data[i+1]&63); j=2; }
else if(D < 240) { w=((D&15)<<12)+(data[i+1]&63)*64+(data[i+2]&63); j=3; }
else { w=(D&7)*262144+((data[i+1]&63)<<12)+(data[i+2]&63)*64+(data[i+3]&63); j=4; }
if(w < 65536) { mdb[k++] = w&255; mdb[k++] = w>>8; }
else {
w -= 65536; ww = 0xD800 + ((w>>10)&1023); w = 0xDC00 + (w&1023);
mdb[k++] = ww&255; mdb[k++] = ww>>>8; mdb[k++] = w&255; mdb[k++] = (w>>>8)&255;
}
}
mdb.length = k;
return mdb.toString('ucs2');
};
magic_encode[65001] = function utf8_e(data, ofmt) {
var len = data.length, w = 0, ww = 0, j = 0;
var direct = typeof data === "string";
if(4 * len > mdl) { mdl = 4 * len; mdb = new Buffer(mdl); }
for(var i = 0; i < len; ++i) {
w = direct ? data.charCodeAt(i) : data[i].charCodeAt(0);
if(w <= 0x007F) mdb[j++] = w;
else if(w <= 0x07FF) {
mdb[j++] = 192 + (w >> 6);
mdb[j++] = 128 + (w&63);
} else if(w >= 0xD800 && w <= 0xDFFF) {
w -= 0xD800; ++i;
ww = (direct ? data.charCodeAt(i) : data[i].charCodeAt(0)) - 0xDC00 + (w << 10);
mdb[j++] = 240 + ((ww>>>18) & 0x07);
mdb[j++] = 144 + ((ww>>>12) & 0x3F);
mdb[j++] = 128 + ((ww>>>6) & 0x3F);
mdb[j++] = 128 + (ww & 0x3F);
} else {
mdb[j++] = 224 + (w >> 12);
mdb[j++] = 128 + ((w >> 6)&63);
mdb[j++] = 128 + (w&63);
}
}
mdb.length = j;
if(ofmt === undefined || ofmt === 'buf') return mdb;
if(ofmt !== 'arr') return mdb.toString('binary');
return [].slice.call(mdb);
};
}
var encache = function encache() {
if(typeof Buffer !== 'undefined') {
if(cpdcache[sbcs_cache[0]]) return;
var i, s;
for(i = 0; i < sbcs_cache.length; ++i) {
s = sbcs_cache[i];
if(cpt[s]) {
cpdcache[s] = sbcs_decode(s);
cpecache[s] = sbcs_encode(s);
}
}
for(i = 0; i < dbcs_cache.length; ++i) {
s = dbcs_cache[i];
if(cpt[s]) {
cpdcache[s] = dbcs_decode(s);
cpecache[s] = dbcs_encode(s);
}
}
for(i = 0; i < magic_cache.length; ++i) {
s = magic_cache[i];
if(magic_decode[s]) cpdcache[s] = magic_decode[s];
if(magic_encode[s]) cpecache[s] = magic_encode[s];
}
}
};
var cp_decache = function cp_decache(cp) { cpdcache[cp] = cpecache[cp] = undefined; };
var decache = function decache() {
if(typeof Buffer !== 'undefined') {
if(!cpdcache[sbcs_cache[0]]) return;
sbcs_cache.forEach(cp_decache);
dbcs_cache.forEach(cp_decache);
magic_cache.forEach(cp_decache);
}
last_enc = last_cp = undefined;
};
var cache = {
encache: encache,
decache: decache,
sbcs: sbcs_cache,
dbcs: dbcs_cache
};
encache();
var BM = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var SetD = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'(),-./:?";
var last_enc, last_cp;
var encode = function encode(cp, data, ofmt) {
if(cp === last_cp) { return last_enc(data, ofmt); }
if(cpecache[cp] !== undefined) { last_enc = cpecache[last_cp=cp]; return last_enc(data, ofmt); }
if(typeof Buffer !== 'undefined' && Buffer.isBuffer(data)) data = data.toString('utf8');
var len = data.length;
var out = typeof Buffer !== 'undefined' ? new Buffer(4*len) : [], w, i, j = 0, c, tt, ww;
var C = cpt[cp], E, M;
if(C && (E=C.enc)) for(i = 0; i < len; ++i, ++j) {
w = E[data[i]];
out[j] = w&255;
if(w > 255) {
out[j] = w>>8;
out[++j] = w&255;
}
}
else if((M=magic[cp])) switch(M) {
case "utf8":
if(typeof Buffer !== 'undefined' && typeof data === "string") { out = new Buffer(data, M); j = out.length; break; }
for(i = 0; i < len; ++i, ++j) {
w = data[i].charCodeAt(0);
if(w <= 0x007F) out[j] = w;
else if(w <= 0x07FF) {
out[j] = 192 + (w >> 6);
out[++j] = 128 + (w&63);
} else if(w >= 0xD800 && w <= 0xDFFF) {
w -= 0xD800;
ww = data[++i].charCodeAt(0) - 0xDC00 + (w << 10);
out[j] = 240 + ((ww>>>18) & 0x07);
out[++j] = 144 + ((ww>>>12) & 0x3F);
out[++j] = 128 + ((ww>>>6) & 0x3F);
out[++j] = 128 + (ww & 0x3F);
} else {
out[j] = 224 + (w >> 12);
out[++j] = 128 + ((w >> 6)&63);
out[++j] = 128 + (w&63);
}
}
break;
case "ascii":
if(typeof Buffer !== 'undefined' && typeof data === "string") { out = new Buffer(data, M); j = out.length; break; }
for(i = 0; i < len; ++i, ++j) {
w = data[i].charCodeAt(0);
if(w <= 0x007F) out[j] = w;
else throw new Error("bad ascii " + w);
}
break;
case "utf16le":
if(typeof Buffer !== 'undefined' && typeof data === "string") { out = new Buffer(data, M); j = out.length; break; }
for(i = 0; i < len; ++i) {
w = data[i].charCodeAt(0);
out[j++] = w&255;
out[j++] = w>>8;
}
break;
case "utf16be":
for(i = 0; i < len; ++i) {
w = data[i].charCodeAt(0);
out[j++] = w>>8;
out[j++] = w&255;
}
break;
case "utf32le":
for(i = 0; i < len; ++i) {
w = data[i].charCodeAt(0);
if(w >= 0xD800 && w <= 0xDFFF) w = 0x10000 + ((w - 0xD800) << 10) + (data[++i].charCodeAt(0) - 0xDC00);
out[j++] = w&255; w >>= 8;
out[j++] = w&255; w >>= 8;
out[j++] = w&255; w >>= 8;
out[j++] = w&255;
}
break;
case "utf32be":
for(i = 0; i < len; ++i) {
w = data[i].charCodeAt(0);
if(w >= 0xD800 && w <= 0xDFFF) w = 0x10000 + ((w - 0xD800) << 10) + (data[++i].charCodeAt(0) - 0xDC00);
out[j+3] = w&255; w >>= 8;
out[j+2] = w&255; w >>= 8;
out[j+1] = w&255; w >>= 8;
out[j] = w&255; w >>= 8;
j+=4;
}
break;
case "utf7":
for(i = 0; i < len; i++) {
c = data[i];
if(c === "+") { out[j++] = 0x2b; out[j++] = 0x2d; continue; }
if(SetD.indexOf(c) > -1) { out[j++] = c.charCodeAt(0); continue; }
tt = encode(1201, c);
out[j++] = 0x2b;
out[j++] = BM.charCodeAt(tt[0]>>2);
out[j++] = BM.charCodeAt(((tt[0]&0x03)<<4) + ((tt[1]||0)>>4));
out[j++] = BM.charCodeAt(((tt[1]&0x0F)<<2) + ((tt[2]||0)>>6));
out[j++] = 0x2d;
}
break;
default: throw new Error("Unsupported magic: " + cp + " " + magic[cp]);
}
else throw new Error("Unrecognized CP: " + cp);
out.length = j;
if(typeof Buffer === 'undefined') return (ofmt == 'str') ? out.map(sfcc).join("") : out;
if(ofmt === undefined || ofmt === 'buf') return out;
if(ofmt !== 'arr') return out.toString('binary');
return [].slice.call(out);
};
var decode = function decode(cp, data) {
var F; if((F=cpdcache[cp])) return F(data);
var len = data.length, out = new Array(len), w, i, j = 1, k = 0, ww;
var C = cpt[cp], D, M;
if(C && (D=C.dec)) {
if(typeof data === "string") data = data.split("").map(cca);
for(i = 0; i < len; i+=j) {
j = 2;
w = D[(data[i]<<8)+ data[i+1]];
if(!w) {
j = 1;
w = D[data[i]];
}
if(!w) throw new Error('Unrecognized code: ' + data[i] + ' ' + data[i+j-1] + ' ' + i + ' ' + j + ' ' + D[data[i]]);
out[k++] = w;
}
}
else if((M=magic[cp])) switch(M) {
case "utf8":
i = 0;
if(len >= 3 && data[0] == 0xEF) if(data[1] == 0xBB && data[2] == 0xBF) i = 3;
for(; i < len; i+=j) {
j = 1;
if(data[i] < 128) w = data[i];
else if(data[i] < 224) { w=(data[i]&31)*64+(data[i+1]&63); j=2; }
else if(data[i] < 240) { w=((data[i]&15)<<12)+(data[i+1]&63)*64+(data[i+2]&63); j=3; }
else { w=(data[i]&7)*262144+((data[i+1]&63)<<12)+(data[i+2]&63)*64+(data[i+3]&63); j=4; }
if(w < 65536) { out[k++] = String.fromCharCode(w); }
else {
w -= 65536; ww = 0xD800 + ((w>>10)&1023); w = 0xDC00 + (w&1023);
out[k++] = String.fromCharCode(ww); out[k++] = String.fromCharCode(w);
}
}
break;
case "ascii":
if(typeof Buffer !== 'undefined' && Buffer.isBuffer(data)) return data.toString(M);
for(i = 0; i < len; i++) out[i] = String.fromCharCode(data[i]);
k = len; break;
case "utf16le":
i = 0;
if(len >= 2 && data[0] == 0xFF) if(data[1] == 0xFE) i = 2;
if(typeof Buffer !== 'undefined' && Buffer.isBuffer(data)) return data.toString(M);
j = 2;
for(; i < len; i+=j) {
out[k++] = String.fromCharCode((data[i+1]<<8) + data[i]);
}
break;
case "utf16be":
i = 0;
if(len >= 2 && data[0] == 0xFE) if(data[1] == 0xFF) i = 2;
j = 2;
for(; i < len; i+=j) {
out[k++] = String.fromCharCode((data[i]<<8) + data[i+1]);
}
break;
case "utf32le":
i = 0;
if(len >= 4 && data[0] == 0xFF) if(data[1] == 0xFE && data[2] == 0 && data[3] == 0) i = 4;
j = 4;
for(; i < len; i+=j) {
w = (data[i+3]<<24) + (data[i+2]<<16) + (data[i+1]<<8) + (data[i]);
if(w > 0xFFFF) {
w -= 0x10000;
out[k++] = String.fromCharCode(0xD800 + ((w >> 10) & 0x3FF));
out[k++] = String.fromCharCode(0xDC00 + (w & 0x3FF));
}
else out[k++] = String.fromCharCode(w);
}
break;
case "utf32be":
i = 0;
if(len >= 4 && data[3] == 0xFF) if(data[2] == 0xFE && data[1] == 0 && data[0] == 0) i = 4;
j = 4;
for(; i < len; i+=j) {
w = (data[i]<<24) + (data[i+1]<<16) + (data[i+2]<<8) + (data[i+3]);
if(w > 0xFFFF) {
w -= 0x10000;
out[k++] = String.fromCharCode(0xD800 + ((w >> 10) & 0x3FF));
out[k++] = String.fromCharCode(0xDC00 + (w & 0x3FF));
}
else out[k++] = String.fromCharCode(w);
}
break;
case "utf7":
i = 0;
if(len >= 4 && data[0] == 0x2B && data[1] == 0x2F && data[2] == 0x76) {
if(len >= 5 && data[3] == 0x38 && data[4] == 0x2D) i = 5;
else if(data[3] == 0x38 || data[3] == 0x39 || data[3] == 0x2B || data[3] == 0x2F) i = 4;
}
for(; i < len; i+=j) {
if(data[i] !== 0x2b) { j=1; out[k++] = String.fromCharCode(data[i]); continue; }
j=1;
if(data[i+1] === 0x2d) { j = 2; out[k++] = "+"; continue; }
while(String.fromCharCode(data[i+j]).match(/[A-Za-z0-9+\/]/)) j++;
var dash = 0;
if(data[i+j] === 0x2d) { ++j; dash=1; }
var tt = [];
var o64;
var c1, c2, c3;
var e1, e2, e3, e4;
for(var l = 1; l < j - dash;) {
e1 = BM.indexOf(String.fromCharCode(data[i+l++]));
e2 = BM.indexOf(String.fromCharCode(data[i+l++]));
c1 = e1 << 2 | e2 >> 4;
tt.push(c1);
e3 = BM.indexOf(String.fromCharCode(data[i+l++]));
if(e3 === -1) break;
c2 = (e2 & 15) << 4 | e3 >> 2;
tt.push(c2);
e4 = BM.indexOf(String.fromCharCode(data[i+l++]));
if(e4 === -1) break;
c3 = (e3 & 3) << 6 | e4;
if(e4 < 64) tt.push(c3);
}
if((tt.length & 1) === 1) tt.length--;
o64 = decode(1201, tt);
for(l = 0; l < o64.length; ++l) out[k++] = o64[l];
}
break;
default: throw new Error("Unsupported magic: " + cp + " " + magic[cp]);
}
else throw new Error("Unrecognized CP: " + cp);
out.length = k;
return out.join("");
};
var hascp = function hascp(cp) { return cpt[cp] || magic[cp]; };
cpt.utils = { decode: decode, encode: encode, hascp: hascp, magic: magic, cache:cache };
return cpt;
}));
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