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[libpng16] tests backported from libpng 1.7

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This updates libpng16 with all the test changes from libpng17,
including changes to pngvalid.c to ensure that the original,
distributed, version of contrib/visupng/cexcept.h can be used.

pngvalid contains the correction to the use of SAVE/STORE_
UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7.  More
tests contain the --strict option to detect warnings and the
pngvalid-standard test has been corrected so that it does not
turn on progresive-read (there is a separate test which does
that.)

Some signed/unsigned fixes have been made.

Signed-off-by: John Bowler <jbowler@acm.org>
This commit is contained in:
John Bowler
2015-09-15 15:38:52 -07:00
parent 1e16e8829d
commit c3e7e7d715
19 changed files with 687 additions and 467 deletions
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7
contrib/visupng/cexcept.h
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@@ -1,12 +1,11 @@
/*===
cexcept.h 2.0.1 (2008-Jul-19-Sat, modified 2015-Jun-03-Mon)
cexcept.h 2.0.1 (2008-Jul-19-Sat)
http://www.nicemice.net/cexcept/
Adam M. Costello
http://www.nicemice.net/amc/
An interface for exception-handling in ANSI C (C89 and subsequent ISO
standards), developed jointly with Cosmin Truta. Revised by John Bowler,
June 2015, to declare exception_env and exception_prev "volatile".
standards), developed jointly with Cosmin Truta.
Copyright (c) 2000-2008 Adam M. Costello and Cosmin Truta.
This software may be modified only if its author and version
@@ -211,7 +210,7 @@ struct exception_context { \
#define Try \
{ \
jmp_buf * volatile exception__prev, exception__env; \
jmp_buf *exception__prev, exception__env; \
exception__prev = the_exception_context->penv; \
the_exception_context->penv = &exception__env; \
if (setjmp(exception__env) == 0) { \