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Improve LLLindenText parsing

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This commit is contained in:
Casper Warden
2023-11-20 20:44:21 +00:00
parent a8f83ef126
commit 9cbc80e1ef
7 changed files with 57 additions and 40 deletions
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51
lib/classes/LLLindenText.ts
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@@ -1,4 +1,5 @@
import { InventoryItem } from './InventoryItem';
import { Utils } from './Utils';
export class LLLindenText
{
@@ -6,14 +7,14 @@ export class LLLindenText
private lineObj: {
lines: string[],
lineNum: number
lineNum: number,
pos: number
} = {
lines: [],
lineNum: 0
lineNum: 0,
pos: 0
};
private pos = 0;
body = '';
embeddedItems: { [key: number]: InventoryItem } = {};
@@ -23,9 +24,9 @@ export class LLLindenText
{
const initial = data.toString('ascii');
this.lineObj.lines = initial.split('\n');
this.pos = 0;
this.lineObj.pos = 0;
let line = this.getLine();
let line = Utils.getNotecardLine(this.lineObj);
if (!line.startsWith('Linden text version'))
{
throw new Error('Invalid Linden Text header');
@@ -40,28 +41,28 @@ export class LLLindenText
const v2 = data.toString('utf-8');
this.lineObj.lines = v2.replace(/\r\n/g, '\n').split('\n');
}
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line !== '{')
{
throw new Error('Error parsing Linden Text file');
}
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line.startsWith('LLEmbeddedItems'))
{
this.parseEmbeddedItems();
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
}
if (!line.startsWith('Text length'))
{
throw new Error('Error parsing Linden Text file: ' + line);
}
const textLength = parseInt(this.getLastToken(line), 10);
this.body = data.slice(this.pos, this.pos + textLength).toString();
const remainingBuffer = data.slice(this.pos + textLength).toString('ascii');
this.body = data.slice(this.lineObj.pos, this.lineObj.pos + textLength).toString();
const remainingBuffer = data.slice(this.lineObj.pos + textLength).toString('ascii');
this.lineObj.lines = remainingBuffer.split('\n');
this.lineObj.lineNum = 0;
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line !== '}')
{
throw new Error('Error parsing Linden Text file');
@@ -93,17 +94,17 @@ export class LLLindenText
{
return Buffer.from(lines.join('\n') + '\n', 'ascii');
}
return Buffer.from(lines.join('\n') + '\n', 'utf-8');
return Buffer.from(lines.join('\n') + '\n\0', 'utf-8');
}
private parseEmbeddedItems(): void
{
let line = this.getLine();
let line = Utils.getNotecardLine(this.lineObj);
if (line !== '{')
{
throw new Error('Invalid LLEmbeddedItems format (no opening brace)');
}
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (!line.startsWith('count'))
{
throw new Error('Invalid LLEmbeddedItems format (no count)');
@@ -111,31 +112,31 @@ export class LLLindenText
const itemCount = parseInt(this.getLastToken(line), 10);
for (let x = 0; x < itemCount; x++)
{
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line !== '{')
{
throw new Error('Invalid LLEmbeddedItems format (no item opening brace)');
}
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (!line.startsWith('ext char index'))
{
throw new Error('Invalid LLEmbeddedItems format (no ext char index)');
}
const index = parseInt(this.getLastToken(line), 10);
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (!line.startsWith('inv_item'))
{
throw new Error('Invalid LLEmbeddedItems format (no inv_item)');
}
const item = InventoryItem.fromAsset(this.lineObj);
const item = InventoryItem.fromEmbeddedAsset(this.lineObj);
this.embeddedItems[index] = item;
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line !== '}')
{
throw new Error('Invalid LLEmbeddedItems format (no closing brace)');
}
}
line = this.getLine();
line = Utils.getNotecardLine(this.lineObj);
if (line !== '}')
{
throw new Error('Error parsing Linden Text file');
@@ -154,12 +155,4 @@ export class LLLindenText
return input.substr(index + 1);
}
}
private getLine(): string
{
const line = this.lineObj.lines[this.lineObj.lineNum++];
this.pos += Buffer.byteLength(line) + 1;
return line.replace(/\r/, '').trim().replace(/[\t ]+/g, ' ');
}
}