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working on optimizations

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This commit is contained in:
sbarman 2011-06-09 17:15:44 -07:00
parent 0e8f323f0a
commit 03747940a2
1 changed files with 35 additions and 25 deletions
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60
pdf.js
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@ -104,10 +104,14 @@ var Stream = (function() {
dest[n++] = bytes[pos++];
this.pos = this.end;
},
skip: function(n) {
if (!n)
n = 1;
this.pos += n;
skip: function() {
this.pos += 1;
},
skipN: function(n) {
this.pos += n;
},
back: function() {
this.pos -= 1;
},
reset: function() {
this.pos = this.start;
@ -319,7 +323,7 @@ var FlateStream = (function() {
getByte: function() {
var bufferLength = this.bufferLength;
var bufferPos = this.bufferPos;
if (bufferLength == bufferPos) {
if (bufferLength <= bufferPos) {
if (this.eof)
return;
this.readBlock();
@ -349,7 +353,7 @@ var FlateStream = (function() {
lookChar: function() {
var bufferLength = this.bufferLength;
var bufferPos = this.bufferPos;
if (bufferLength == bufferPos) {
if (bufferLength <= bufferPos) {
if (this.eof)
return;
this.readBlock();
@ -380,11 +384,16 @@ var FlateStream = (function() {
// update stream position
this.pos = n;
},
skip: function(n) {
if (!n)
n = 1;
while (n-- > 0)
this.getChar();
skip: function() {
this.bufferPos++;
//this.getByte();
},
skipN: function(n) {
this.bufferPos += n;
//this.getBytes(n);
},
back: function() {
this.bufferPos--;
},
generateHuffmanTable: function(lengths) {
var n = lengths.length;
@ -609,19 +618,19 @@ var Ref = (function() {
})();
function IsBool(v) {
return typeof v == "boolean";
return typeof v === "boolean";
}
function IsInt(v) {
return typeof v == "number" && ((v|0) == v);
return typeof v === "number" && ((v|0) === v);
}
function IsNum(v) {
return typeof v == "number";
return typeof v === "number";
}
function IsString(v) {
return typeof v == "string";
return typeof v === "string";
}
function IsNull(v) {
@ -633,11 +642,11 @@ function IsName(v) {
}
function IsCmd(v, cmd) {
return v instanceof Cmd && (!cmd || v.cmd == cmd);
return v instanceof Cmd && (!cmd || v.cmd === cmd);
}
function IsDict(v, type) {
return v instanceof Dict && (!type || v.get("Type").name == type);
return v instanceof Dict && (!type || v.get("Type").name === type);
}
function IsArray(v) {
@ -655,13 +664,13 @@ function IsRef(v) {
var EOF = {};
function IsEOF(v) {
return v == EOF;
return v === EOF;
}
var None = {};
function IsNone(v) {
return v == None;
return v === None;
}
var Lexer = (function() {
@ -714,23 +723,24 @@ var Lexer = (function() {
var str = ch;
var stream = this.stream;
do {
ch = stream.lookChar();
if (ch == "." && !floating) {
ch = stream.getChar();
if (ch === "." && !floating) {
str += ch;
floating = true;
} else if (ch == "-") {
} else if (ch === "-") {
// ignore minus signs in the middle of numbers to match
// Adobe's behavior
warn("Badly formated number");
} else if (ch >= "0" && ch <= "9") {
str += ch;
} else if (ch == "e" || ch == "E") {
} else if (ch === "e" || ch === "E") {
floating = true;
} else {
// the last character doesn't belong to us
stream.back();
break;
}
stream.skip();
//stream.skip();
} while (true);
var value = parseFloat(str);
if (isNaN(value))
@ -1524,7 +1534,7 @@ var PDFDoc = (function() {
start = 0;
stream.pos = start;
if (find(stream, "startxref", 1024, true)) {
stream.skip(9);
stream.skipN(9);
var ch;
while (Lexer.isSpace(ch = stream.getChar()))
;