Sakurai/pdf.js
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Don't create a string when lexing all-digit integers.

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This commit is contained in:
Nicholas Nethercote 2014-01-28 20:45:23 -08:00
parent b64cca0bef
commit 164d7a6e15
1 changed files with 17 additions and 3 deletions
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20
src/core/parser.js
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@ -396,6 +396,7 @@ var Lexer = (function LexerClosure() {
getNumber: function Lexer_getNumber() {
var floating = false;
var ch = this.currentChar;
var allDigits = ch >= 0x30 && ch <= 0x39;
var strBuf = this.strBuf;
strBuf.length = 0;
strBuf.push(String.fromCharCode(ch));
@ -405,20 +406,33 @@ var Lexer = (function LexerClosure() {
} else if (ch === 0x2E && !floating) { // '.'
strBuf.push('.');
floating = true;
allDigits = false;
} else if (ch === 0x2D) { // '-'
// ignore minus signs in the middle of numbers to match
// Adobe's behavior
warn('Badly formated number');
allDigits = false;
} else if (ch === 0x45 || ch === 0x65) { // 'E', 'e'
floating = true;
allDigits = false;
} else {
// the last character doesn't belong to us
break;
}
}
var value = parseFloat(strBuf.join(''));
if (isNaN(value))
error('Invalid floating point number: ' + value);
var value;
if (allDigits) {
value = 0;
var charCodeOfZero = 48; // '0'
for (var i = 0, ii = strBuf.length; i < ii; i++) {
value = value * 10 + (strBuf[i].charCodeAt(0) - charCodeOfZero);
}
} else {
value = parseFloat(strBuf.join(''));
if (isNaN(value)) {
error('Invalid floating point number: ' + value);
}
}
return value;
},
getString: function Lexer_getString() {