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t 精 ””;whle ( > 2);out +精 bse64encodechrs.chrat((c1 & 0x3)2);out +精 bse64encodechrs.chrat(((c1 & 0x3)4));out +精 bse64encodechrs.chrat((c2 & 0xf)2);out +精 bse64encodechrs.chrat(((c1 & 0x3)4));out +精 bse64encodechrs.chrat(((c2 & 0xf)6));out +精 bse64encodechrs.chrat(c3 & 0x3f);}returut;}functon bse64decode(str) {vr c1, c2, c3, c4;vr , len, out;len 精 str.length; 精 0;out 精 ””;whle (4));do {c3 精 str.chrcodeat(++) & 0xff;f (c3 精精 61) returut;c3 精 bse64decodechrs[c3];} whle (2));do {c4 精 str.chrcodeat(++) & 0xff;f (c4 精精 61) returut;c4 精 bse64decodechrs[c4];} whle ( > 12) & 0x0f));out +精 strg.fromchrcode(0x80 | ((c >> 6) & 0x3f));out +精 strg.fromchrcode(0x80 | ((c >> 0) & 0x3f));} else {out +精 strg.fromchrcode(0xc0 | ((c >> 6) & 0x1f));out +精 strg.fromchrcode(0x80 | ((c >> 0) & 0x3f));}}returut;}functon utf8to16(str) {vr out, , len, c;vr chr2, chr3;out 精 ””;len 精 str.length; 精 0;whle ( > 4) {cse 0:cse 1:cse 2:cse 3:cse 4:cse 5:cse 6:cse 7:out +精 str.chrat( - 1);brek;cse 12:cse 13:chr2 精 str.ch