mirror of https://github.com/qpdf/qpdf.git
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#ifndef __PL_MD5_HH__
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#define __PL_MD5_HH__
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// This pipeline sends its output to its successor unmodified. After
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// calling finish, the MD5 checksum of the data that passed through
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// the pipeline is available.
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// This pipeline is reusable; i.e., it is safe to call write() after
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// calling finish(). The first call to write() after a call to
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// finish() initializes a new MD5 object.
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#include <qpdf/Pipeline.hh>
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#include <qpdf/MD5.hh>
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class Pl_MD5: public Pipeline
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{
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public:
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QPDF_DLL
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Pl_MD5(char const* identifier, Pipeline* next);
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QPDF_DLL
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virtual ~Pl_MD5();
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QPDF_DLL
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virtual void write(unsigned char*, size_t);
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QPDF_DLL
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virtual void finish();
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QPDF_DLL
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std::string getHexDigest();
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// Enable/disable. Disabling the pipeline causes it to become a
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// pass-through. This makes it possible to stick an MD5 pipeline
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// in a pipeline when it may or may not be required. Disabling it
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// avoids incurring the runtime overhead of doing needless
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// digest computation.
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QPDF_DLL
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void enable(bool enabled);
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// If persistAcrossFinish is called, calls to finish do not
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// finalize the underlying md5 object. In this case, the object is
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// not finalized until getHexDigest() is called.
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QPDF_DLL
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void persistAcrossFinish(bool);
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private:
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bool in_progress;
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MD5 md5;
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bool enabled;
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bool persist_across_finish;
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};
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#endif // __PL_MD5_HH__
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