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lookChar refactoring

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This commit is contained in:
Yury Delendik 2013-06-30 15:45:15 -05:00
parent ba87d2fe11
commit 19e8f2f059
8 changed files with 251 additions and 272 deletions
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67
src/function.js
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@ -816,53 +816,54 @@ var PostScriptToken = (function PostScriptTokenClosure() {
var PostScriptLexer = (function PostScriptLexerClosure() {
function PostScriptLexer(stream) {
this.stream = stream;
this.nextChar();
}
PostScriptLexer.prototype = {
nextChar: function PostScriptLexer_nextChar() {
return (this.currentChar = this.stream.getByte());
},
getToken: function PostScriptLexer_getToken() {
var s = '';
var ch;
var comment = false;
var stream = this.stream;
var ch = this.currentChar;
// skip comments
while (true) {
if (!(ch = stream.getChar()))
if (ch < 0) {
return EOF;
}
if (comment) {
if (ch == '\x0a' || ch == '\x0d')
if (ch === 0x0A || ch === 0x0D) {
comment = false;
} else if (ch == '%') {
}
} else if (ch == 0x25) { // '%'
comment = true;
} else if (!Lexer.isSpace(ch)) {
break;
}
ch = this.nextChar();
}
switch (ch) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '+': case '-': case '.':
switch (ch | 0) {
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
return new PostScriptToken(PostScriptTokenTypes.NUMBER,
this.getNumber(ch));
case '{':
this.getNumber());
case 0x7B: // '{'
this.nextChar();
return PostScriptToken.LBRACE;
case '}':
case 0x7D: // '}'
this.nextChar();
return PostScriptToken.RBRACE;
}
// operator
var str = ch.toLowerCase();
while (true) {
ch = stream.lookChar();
if (ch === null)
break;
ch = ch.toLowerCase();
if (ch >= 'a' && ch <= 'z')
str += ch;
else
break;
stream.skip();
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
str += String.fromCharCode(ch);
}
switch (str) {
switch (str.toLowerCase()) {
case 'if':
return PostScriptToken.IF;
case 'ifelse':
@ -871,16 +872,16 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
return PostScriptToken.getOperator(str);
}
},
getNumber: function PostScriptLexer_getNumber(ch) {
var str = ch;
var stream = this.stream;
while (true) {
ch = stream.lookChar();
if ((ch >= '0' && ch <= '9') || ch == '-' || ch == '.')
str += ch;
else
getNumber: function PostScriptLexer_getNumber() {
var ch = this.currentChar;
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0) {
if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
ch === 0x2D || ch === 0x2E) { // '-', '.'
str += String.fromCharCode(ch);
} else {
break;
stream.skip();
}
}
var value = parseFloat(str);
if (isNaN(value))