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https://github.com/qpdf/qpdf.git
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5d4cad9c02
Significantly improve the code's use of off_t for file offsets, size_t for memory sizes, and integer types in cases where there has to be compatibility with external interfaces. Rework sections of the code that would have prevented qpdf from working on files larger than 2 (or maybe 4) GB in size.
56 lines
1.1 KiB
C++
56 lines
1.1 KiB
C++
#include <qpdf/Pl_MD5.hh>
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#include <stdexcept>
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Pl_MD5::Pl_MD5(char const* identifier, Pipeline* next) :
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Pipeline(identifier, next),
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in_progress(false)
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{
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}
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Pl_MD5::~Pl_MD5()
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{
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}
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void
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Pl_MD5::write(unsigned char* buf, size_t len)
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{
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if (! this->in_progress)
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{
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this->md5.reset();
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this->in_progress = true;
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}
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// Write in chunks in case len is too big to fit in an int.
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// Assume int is at least 32 bits.
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static size_t const max_bytes = 1 << 30;
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size_t bytes_left = len;
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unsigned char* data = buf;
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while (bytes_left > 0)
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{
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size_t bytes = (bytes_left >= max_bytes ? max_bytes : bytes_left);
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this->md5.encodeDataIncrementally((char*) data, (int)bytes);
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bytes_left -= bytes;
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data += bytes;
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}
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this->getNext()->write(buf, len);
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}
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void
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Pl_MD5::finish()
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{
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this->getNext()->finish();
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this->in_progress = false;
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}
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std::string
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Pl_MD5::getHexDigest()
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{
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if (this->in_progress)
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{
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throw std::logic_error(
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"digest requested for in-progress MD5 Pipeline");
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}
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return this->md5.unparse();
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}
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