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Comment about non-const Pipeline data

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This commit is contained in:
Jay Berkenbilt 2012-12-28 11:43:49 -05:00
parent 0873e42300
commit 8f5de08c2a
1 changed files with 7 additions and 1 deletions
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8
include/qpdf/Pipeline.hh
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@ -44,7 +44,13 @@ class Pipeline
// Subclasses should implement write and finish to do their jobs
// and then, if they are not end-of-line pipelines, call
// getNext()->write or getNext()->finish.
// getNext()->write or getNext()->finish. It would be really nice
// if write could take unsigned char const*, but this would make
// it much more difficult to write pipelines around legacy
// interfaces whose calls don't want pointers to const data. As a
// rule, pipelines should generally not be modifying the data
// passed to them. They should, instead, create new data to pass
// downstream.
QPDF_DLL
virtual void write(unsigned char* data, size_t len) = 0;
QPDF_DLL