#1 Line counter

[Nom]

Feature request: line counter in struct ezxml.

unsigned int line; // line number on which this tag was opened (starting
from 0)

This field counts the number of newlines encountered before the opening
'<' of the tag and records that value for each tag. It is mainly useful for
error handling, as it allows the program to determine on what line an
unexpected tag occurs.

[Aaron Voisine]

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The current version, 0.8.5, already lists the approximate line number (can be
thrown off a bit by entity substitutions) when a well-formedness error is
detected. It is slightly slower in that it counts up the lines when the error occurs,
but it doesn't require an extra int to be recorded for every tag, and only happens
once when there is an error.

[Nom]

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Hmm. But there doesn't seem to be an accessor for passing the line number
information back to the calling program.

There are 3 types of errors that could be encountered: well-formedness,
structural (ie doesn't comply with DTD) and semantic (document is well formed
and complies with the DTD, but the content is not correct). In the case of the
latter two, it would be nice to have access to the original line number to point
the user to the correct place.

[Aaron Voisine]

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Yes, the only way to access it would be to parse the error message... not very
convenient I agree, but it's there if you really need it. ezXML is not a
validating parser, so it only detects well-formedness errors. Are you building
a validator on top of ezXML? If so you can take a look at ezxml_err() and see
how it is estimating the line number and duplicate that. You will probably
need access to some of the interal structs and defines in ezxml.c to do
something like that anyway. I really want to avoid adding any more variables
to ezxml_t if I can help it. Each one increases the memory required for an
entire document by a significant amount. ezXML is being used by several
embedded projects.