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author | Glenn Randers-Pehrson <glennrp at users.sourceforge.net> | 2010-06-28 20:17:48 -0500 |
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committer | Glenn Randers-Pehrson <glennrp at users.sourceforge.net> | 2010-06-28 20:19:57 -0500 |
commit | 73e28ef13db95d372c5e1ad09cec5d4236854d7f (patch) | |
tree | ec9f75afcaa6c6cbb78086ca520fd4fce136ef87 /pnginfo.h | |
parent | 6cac43c974806cf5823eccc754f42d68b4a55b42 (diff) | |
download | libpng-73e28ef13db95d372c5e1ad09cec5d4236854d7f.tar.gz |
[devel] Reverted changes to call png_longjmp in contrib/gregbook
where it is not appropriate. If mainprog->jmpbuf is used by setjmp,
then png_longjmp cannot be used.
Reversed patch to remove error handler when the jmp_buf is stored in the
main program structure, not the png_struct.
The error handler is needed because the default handler in libpng will
always use the jmp_buf in the library control structure; this is never
set. The gregbook code is a useful example because, even though it
uses setjmp/longjmp, it shows how error handling can be implemented
using control mechanisms not directly supported by libpng. The
technique will work correctly with mechanisms such as Microsoft
Structure Exceptions or C++ exceptions (compiler willing - note that gcc
does not by default support interworking of C and C++ error handling.)
Diffstat (limited to 'pnginfo.h')
0 files changed, 0 insertions, 0 deletions