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Use a pointer to the top error stack slot instead of access via
array and index. Return the stack slot from fz_push_try.
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Tor turned up an interesting section in the C spec about this. See
page 275 of http://open-std.org/jtc1/sc22/wg14/www/docs/n1494.pdf
regarding acceptable places for setjmp to occur.
It seems that:
if (setjmp(buf))
if (!setjmp(buf))
if (setjmp(buf) {==,!=,<,>} <integer constant>)
etc are all valid things to do, but assignments (and subsequent
testing of values) like:
if ((code = setjmp(buf)) == 0)
are not allowed.
Further, it's not even clear that:
if (a() && setjmp(buf))
is permissible.
We therefore recast the macros into the form:
a();
if (setjmp((buf)) == 0)
which should be acceptable under the C spec.
To keep try atomic, we introduce a block '{{{' around this, along
with a matching close block '}}}' in the catch clause. This has the
nifty extra effect of giving us a compile time error if we mismatch
our try/catches.
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Add a new class of errors and use them to abort interpretation when
the test device detects a color page.
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We build MuPDF without NDEBUG defined in order to check assertions but
don't want Visual Studio's Output console flooded with warnings for
broken documents. So instead of always defining USE_OUTPUT_DEBUG_STRING
for debug builds under Windows, allow the VS solutions to define it
when desired and to omit it when not.
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We are testing this using a new -p flag to mupdf that sets a bitrate at
which data will appear to arrive progressively as time goes on. For
example:
mupdf -p 102400 pdf_reference17.pdf
Details of the scheme used here are presented in docs/progressive.txt
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Stupid windows debugger doesn't show stdout/stderr anywhere in
non console apps, so add code to make errors/warnings visible.
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We need to have it as a prefix, not a postfix now, but it should
work on both gcc and MSVC now.
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