mirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/mozilla/pdf.js.git synced 2025-04-22 16:18:08 +02:00
Code Activity

Reduce the number of isCmd calls slightly in the XRef class

Browse source 
This reduces the total number of function calls, when reading the XRef table respectively when fetching uncompressed XRef entries.
Note in particular the `XRef.readXRefTable` method, where there're *two* back-to-back `isCmd` checks rather than just one.
This commit is contained in:
Jonas Jenwald 2019-06-29 16:24:08 +02:00
parent 2800962285
commit 41745a5996
1 changed files with 11 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

17
src/core/obj.js
View file

@ -20,7 +20,7 @@ import {
warn
} from '../shared/util';
import {
clearPrimitiveCaches, Dict, isCmd, isDict, isName, isRef, isRefsEqual,
clearPrimitiveCaches, Cmd, Dict, isCmd, isDict, isName, isRef, isRefsEqual,
isStream, Ref, RefSet, RefSetCache
} from './primitives';
import { Lexer, Parser } from './parser';
@ -1200,10 +1200,15 @@ var XRef = (function XRefClosure() {
entry.gen = parser.getObj();
var type = parser.getObj();
if (isCmd(type, 'f')) {
entry.free = true;
} else if (isCmd(type, 'n')) {
entry.uncompressed = true;
if (type instanceof Cmd) {
switch (type.cmd) {
case 'f':
entry.free = true;
break;
case 'n':
entry.uncompressed = true;
break;
}
}
// Validate entry obj
@ -1685,7 +1690,7 @@ var XRef = (function XRefClosure() {
if (!Number.isInteger(obj2)) {
obj2 = parseInt(obj2, 10);
}
if (obj1 !== num || obj2 !== gen || !isCmd(obj3)) {
if (obj1 !== num || obj2 !== gen || !(obj3 instanceof Cmd)) {
throw new XRefEntryException(`Bad (uncompressed) XRef entry: ${ref}`);
}
if (obj3.cmd !== 'obj') {