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Handle some illegal characters in hex string

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Do not throw exception when hex strings are in the wrong format

Currently pdf.js is throwing an exception for the following hex string:

`<7 0 2 15 5 2 2 2 4 3 2 4>`

The issue is that the 15 is not a valid hex character so pdf.js ends up
throwing an exception.

This diff changes the parser to process the above hex string as follow:

`70 21 55 2 24 32` (Note: the final 4 of the hex string is ignored)

replicating the behaviour of MuPDF, and doesn't throw an exception.
This commit is contained in:
mduan 2013-01-08 15:28:08 -08:00
parent 7d9938df5f
commit eb8f4e8343
2 changed files with 35 additions and 18 deletions
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11
test/unit/parser_spec.js
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@ -12,6 +12,17 @@ describe('parser', function() {
expect(result).toEqual(11.234);
});
it('should not throw exception on bad input', function() {
// '8 0 2 15 5 2 2 2 4 3 2 4'
// should be parsed as
// '80 21 55 22 24 32'
var input = new StringStream('7 0 2 15 5 2 2 2 4 3 2 4>');
var lexer = new Lexer(input);
var result = lexer.getHexString('<');
expect(result).toEqual('p!U"$2');
});
});
});