class aripak{MAX_PACK=220;ZERO=0;RAW=1;PATCH=2;COPY=3;copies=0;blocks=[];bit_buf=[];bit_block=[];constructor(t,i,s,h,e){this.ctx=t,this.cb=e,this.bits=i,this.oldf=s,this.newf=h,this.bsize=1<<this.bits,this.old_len=this.oldf.length,this.new_len=this.newf.length,this.flash_page_size=16384,this.abits=Math.ceil(Math.log2(this.old_len)),this.bc_new=Math.floor(this.new_len/this.bsize),this.bc_old=Math.floor(this.old_len/this.bsize),console.log("ARIPAK",this.oldf.length,this.newf.length,this.bc_old,this.bc_new),console.log("ARIPAK!",JSON.stringify(typeof this.oldf),JSON.stringify(typeof this.newf))}page(t){return Math.floor(t*this.bsize/this.flash_page_size)}N(t){return this.newf.slice(t,t+this.bsize)}O(t){return this.oldf.slice(t,t+this.bsize)}diff(t,h){return t.reduce((t,i,s)=>t+(i===h[s]?1:0),0)}bits_init(){this.bit_buf=[]}bits_emit(t,i){for(var s=0;s<i;s++)this.bit_buf.push(t>>i-1-s&1)}bits_get(){for(var t=[],i=0;i<this.bit_block.length;i+=8){for(var s=0,h=0;h<8;h++)s|=this.bit_block[i+h]<<h;t.push(s)}return t}emit(t){if(t.type==this.ZERO)return 0;switch(this.bits_init(),t.target=t.i*this.bsize,this.bits_emit(t.type,2),this.bits_emit(t.i,this.abits-this.bits),t.type){case this.ZERO:break;case this.RAW:for(var i of t.buf)this.bits_emit(i,8);break;case this.COPY:t.delta=t.target-t.src,t.dry||(this.copies+=1),Math.abs(t.delta)<128?(this.bits_emit(0,1),this.bits_emit(t.delta,8)):(this.bits_emit(1,1),this.bits_emit(t.src,18));break;case this.PATCH:t.delta=t.target-t.src,t.dry||(this.copies+=1),Math.abs(t.delta)<128?(this.bits_emit(0,1),this.bits_emit(t.delta,8)):(this.bits_emit(1,1),this.bits_emit(t.src,this.abits)),this.bits_emit(t.fixes.length,this.bits);for(var s of t.fixes)this.bits_emit(s[0],this.bits),this.bits_emit(s[1],8)}var h=this.bit_buf.length;return t.dry||(this.bit_block.length+this.bit_buf.length>8*this.MAX_PACK?this.emit_blocks():this.bit_block=this.bit_block.concat(this.bit_buf)),h}pak(){for(var t=0;t<this.bc_new;t++)this.pak_i(t);return{blocks:this.blocks}}pak_i(t){for(var i=0,s=0,h=this.N(t*this.bsize),e=0;e<this.old_len;e+=1){var b=this.page(e)<this.page(t)?this.diff(this.N(e),h):this.diff(this.O(e),h);if(i<b&&(i=b,s=e),i==this.bsize)break}for(var r=[],l=this.O(s),h=this.N(t*this.bsize),o=!0,a=0;a<this.bsize;a++)l[a]!=h[a]&&r.push([a,h[a]]),o&&0!=h[a]&&(o=!1);var _=o?{type:this.ZERO,i:t}:r.length?this.emit({type:this.PATCH,i:t,src:s,fixes:r,dry:!0})<this.emit({type:this.RAW,i:t,buf:h,dry:!0})?{type:this.PATCH,i:t,src:s,fixes:r}:{type:this.RAW,i:t,buf:h}:{type:this.COPY,i:t,src:s},c=this.emit(_);this.ctx.sprintf("%d.%1d",c/8,c%8),this.cb(this,"EMIT",{op:_,plen:c,plens:c/8,bits:this.bit_buf}),t+1==this.bc_new&&this.bits_get().length&&this.emit_blocks()}emit_blocks(){this.cb(this,"BLK"),this.blocks.push(this.bits_get().map(t=>t.toString(16).padStart(2,"0")).join("")),this.bit_block=[],this.bits_init()}}try{module.exports=aripak}catch(t){}