@chicowall/grf-loader/dist/index.js

A loader for GRF files (Ragnarok Online game file)

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e===-1||e===n.length-1?"":n.substring(e+1).toLowerCase()}function Ce(n,e){return D(n,e==="euc-kr"||e==="cp949"?"cp949":e)}var A=class{constructor(e,t){this.fd=e;this.version=512;this.fileCount=0;this.loaded=!1;this.files=new Map;this.normalizedIndex=new Map;this.extensionIndex=new Map;this.fileTableOffset=0;this.cache=new Map;this.cacheMaxSize=50;this.cacheOrder=[];this._stats={fileCount:0,badNameCount:0,collisionCount:0,extensionStats:new Map,detectedEncoding:"utf-8"};this.options={filenameEncoding:t?.filenameEncoding??"auto",autoDetectThreshold:t?.autoDetectThreshold??Fe,maxFileUncompressedBytes:t?.maxFileUncompressedBytes??Ue,maxEntries:t?.maxEntries??Ae}}async getStreamReader(e,t){let r=await this.getStreamBuffer(this.fd,e,t);return new me(r,void 0,void 0,!0)}async load(){this.loaded||(await this.parseHeader(),await this.parseFileList(),this.loaded=!0)}async parseHeader(){let e=await this.getStreamReader(0,_),t=e.getString(15);if(t!==ye)throw new h("INVALID_MAGIC","Not a GRF file (invalid signature)",{signature:t});e.skip(15);let r=e.tell();if(e.seek(42),this.version=e.getUint32(),this.version!==512&&this.version!==768)throw new h("UNSUPPORTED_VERSION",`Unsupported version "0x${this.version.toString(16)}"`,{version:this.version});if(e.seek(r),this.version===512){this.fileTableOffset=e.getUint32()+_;let o=e.getUint32();this.fileCount=e.getUint32()-o-7}else{let o=e.getUint32(),a=e.getUint32();if(a>>>8){this.version=512,e.seek(r),this.fileTableOffset=e.getUint32()+_;let i=e.getUint32();this.fileCount=e.getUint32()-i-7}else this.fileTableOffset=a*4294967296+o+_,this.fileCount=e.getUint32()}if(this.fileCount>this.options.maxEntries)throw new h("LIMIT_EXCEEDED",`File count ${this.fileCount} exceeds limit ${this.options.maxEntries}`,{fileCount:this.fileCount,maxEntries:this.options.maxEntries})}async parseFileList(){let e=this.version===768?4:0,t=await this.getStreamReader(this.fileTableOffset+e,X),r=t.getUint32(),o=t.getUint32(),a=await this.getStreamBuffer(this.fd,this.fileTableOffset+e+X,r),i;try{i=K.inflate(a)}catch(f){throw new h("CORRUPT_TABLE","Failed to decompress file table",{compressedSize:r,realSize:o,error:f instanceof Error?f.message:String(f)})}if(i.length!==o)throw new h("CORRUPT_TABLE",`File table size mismatch: expected ${o}, got ${i.length}`,{expected:o,actual:i.length});let l=this.options.filenameEncoding;if(this.options.filenameEncoding==="auto"){let f=[],s=0,m=Math.min(200,this.fileCount),b=this.version===768?21:17;for(let x=0;x<m&&s<i.length;x++){let g=s;for(;i[g]!==0&&g<i.length;)g++;let S=i.subarray(s,g);f.push(S),s=g+1+b}l=W(f,this.options.autoDetectThreshold)}this._stats.detectedEncoding=l,this._stats.badNameCount=0,this._stats.collisionCount=0,this._stats.extensionStats.clear();let u=this.version===768?21:17;for(let f=0,s=0;f<this.fileCount;++f){if(s>=i.length)throw new h("CORRUPT_TABLE",`Unexpected end of file table at entry ${f}`,{position:s,dataLength:i.length,entryIndex:f});let m=s;for(;i[m]!==0&&m<i.length;)m++;let b=i.slice(s,m),x=Ce(b,l);if(C(x)>0&&this._stats.badNameCount++,s=m+1,s+u>i.length)throw new h("CORRUPT_TABLE",`Incomplete entry data at entry ${f}`,{position:s,dataLength:i.length,entryIndex:f});let g=i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24,S=i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24,q=i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24,Z=i[s++],T;if(this.version===768){let R=(i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24)>>>0;T=((i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24)>>>0)*4294967296+R}else T=(i[s++]|i[s++]<<8|i[s++]<<16|i[s++]<<24)>>>0;let w={compressedSize:g,lengthAligned:S,realSize:q,type:Z,offset:T,rawNameBytes:b};if(!(w.realSize>this.options.maxFileUncompressedBytes)&&w.type&ge){this.files.set(x,w);let R=U(x),P=this.normalizedIndex.get(R);P?(P.push(x),this._stats.collisionCount++):this.normalizedIndex.set(R,[x]);let F=Q(x);if(F){let N=this.extensionIndex.get(F);N?N.push(x):this.extensionIndex.set(F,[x]),this._stats.extensionStats.set(F,(this._stats.extensionStats.get(F)||0)+1)}}}this._stats.fileCount=this.files.size}decodeEntry(e,t){return t.type&be?k(e,t.lengthAligned,t.compressedSize):t.type&Ee&&j(e,t.lengthAligned),t.realSize===t.compressedSize?e:K.inflate(e)}addToCache(e,t){if(this.cacheOrder.length>=this.cacheMaxSize){let r=this.cacheOrder.shift();r&&this.cache.delete(r)}this.cache.set(e,t),this.cacheOrder.push(e)}getFromCache(e){let t=this.cache.get(e);if(t){let r=this.cacheOrder.indexOf(e);r>-1&&(this.cacheOrder.splice(r,1),this.cacheOrder.push(e))}return t}clearCache(){this.cache.clear(),this.cacheOrder=[]}async getFile(e){if(!this.loaded)return Promise.resolve({data:null,error:"GRF not loaded yet"});let t=this.resolvePath(e);if(t.status==="not_found")return Promise.resolve({data:null,error:`File "${e}" not found`});if(t.status==="ambiguous")return Promise.resolve({data:null,error:`Ambiguous path "${e}": ${t.candidates?.length} matches found. Use exact path: ${t.candidates?.slice(0,5).join(", ")}${(t.candidates?.length||0)>5?"...":""}`});let r=t.matchedPath,o=this.getFromCache(r);if(o)return Promise.resolve({data:o,error:null});let a=this.files.get(r);if(!a)return{data:null,error:`File "${r}" not found`};let i=await this.getStreamBuffer(this.fd,a.offset+_,a.lengthAligned);try{let l=this.decodeEntry(i,a);return this.addToCache(r,l),Promise.resolve({data:l,error:null})}catch(l){return{data:null,error:l instanceof Error?l.message:String(l)}}}resolvePath(e){if(this.files.has(e))return{status:"found",matchedPath:e};let t=U(e),r=this.normalizedIndex.get(t);return!r||r.length===0?{status:"not_found"}:r.length===1?{status:"found",matchedPath:r[0]}:{status:"ambiguous",candidates:r}}hasFile(e){return this.resolvePath(e).status==="found"}getEntry(e){let t=this.resolvePath(e);return t.status!=="found"||!t.matchedPath?null:this.files.get(t.matchedPath)||null}find(e={}){let{ext:t,contains:r,endsWith:o,regex:a,limit:i}=e,l=[];if(t&&!r&&!o&&!a){let u=t.toLowerCase().replace(/^\./,"");l=this.extensionIndex.get(u)||[]}else for(let u of this.files.keys()){if(t){let f=t.toLowerCase().replace(/^\./,"");if(Q(u)!==f)continue}if(r){let f=U(u),s=U(r);if(!f.includes(s))continue}if(o){let f=U(u),s=U(o);if(!f.endsWith(s))continue}if(!(a&&!a.test(u))&&(l.push(u),i&&l.length>=i))break}return i&&l.length>i&&(l=l.slice(0,i)),l}getFilesByExtension(e){let t=e.toLowerCase().replace(/^\./,"");return this.extensionIndex.get(t)||[]}listExtensions(){return Array.from(this.extensionIndex.keys()).sort()}listFiles(){return Array.from(this.files.keys())}getStats(){return{...this._stats,extensionStats:new Map(this._stats.extensionStats)}}getDetectedEncoding(){return this._stats.detectedEncoding}async reloadWithEncoding(e){this.options.filenameEncoding=e,this.files.clear(),this.normalizedIndex.clear(),this.extensionIndex.clear(),this.clearCache(),this.loaded=!1,await this.load()}};var L=class extends A{constructor(e,t){super(e,t)}async getStreamBuffer(e,t,r){return new Promise((o,a)=>{let i=new FileReader;i.onerror=a,i.onload=()=>o(new Uint8Array(i.result)),i.readAsArrayBuffer(e.slice(t,t+r))})}};import{fstatSync as _e,read as Re}from"fs";import{promisify as ve}from"util";var z=class{constructor(){this.pools=new Map;this.maxPoolSize=10;this.poolSizes=[1024,4096,8192,16384,32768,65536,131072,262144];for(let e of this.poolSizes)this.pools.set(e,[])}getPoolSize(e){for(let t of this.poolSizes)if(e<=t)return t;return null}acquire(e){let t=this.getPoolSize(e);if(t===null)return Buffer.allocUnsafe(e);let r=this.pools.get(t);if(r){let o=r.find(a=>!a.inUse);if(o)return o.inUse=!0,o.buffer.subarray(0,e);if(r.length<this.maxPoolSize){let a=Buffer.allocUnsafe(t);return r.push({buffer:a,inUse:!0}),a.subarray(0,e)}}return Buffer.allocUnsafe(e)}release(e){let t=e.buffer.byteLength,r=this.pools.get(t);if(r){let o=r.find(a=>a.buffer===e||a.buffer.buffer===e.buffer);o&&(o.inUse=!1)}}clear(){for(let e of this.pools.values())e.length=0}stats(){let e=[];for(let[t,r]of this.pools.entries())e.push({size:t,total:r.length,inUse:r.filter(o=>o.inUse).length});return e}},v=new z;var Se=ve(Re),G=class extends A{constructor(e,t){super(e,t),this.useBufferPool=t?.useBufferPool??!0;try{if(!_e(e).isFile())throw new Error("GRFNode: file descriptor must point to a regular file")}catch{throw new Error("GRFNode: invalid file descriptor")}}async getStreamBuffer(e,t,r){let o=this.useBufferPool?v.acquire(r):Buffer.allocUnsafe(r),{bytesRead:a}=await Se(e,o,0,r,t);if(a!==r)throw this.useBufferPool&&v.release(o),new Error("Not a GRF file (invalid signature)");return o}};export{pe as GRF_ERROR_CODES,L as GrfBrowser,h as GrfError,G as GrfNode,v as bufferPool,C as countBadChars,O as countC1ControlChars,I as countReplacementChars,Y as fixMojibake,ue as hasIconvLite,$ as isMojibake,he as normalizeEncodingPath,V as normalizeFilename,de as toMojibake};
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