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a/src/readfile.h |
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b/src/readfile.h |
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#include <sys/types.h>
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#include <sys/types.h>
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#include <string>
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#include <string>
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/**
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class FileScanUpstream;
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* Read file in chunks, calling an accumulator for each chunk. Can be used
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* for reading in a file, computing an md5...
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/** Data sink for the file reader. */
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*/
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class FileScanDo {
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class FileScanDo {
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public:
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public:
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virtual ~FileScanDo() {}
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virtual ~FileScanDo() {}
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/* Initialize and allocate.
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* @param size if set, lower bound of data size.
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* @param reason[output] set to error message in case of error.
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* @return false for error (file_scan will return), true if ok.
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*/
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virtual bool init(size_t size, std::string *reason) = 0;
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virtual bool init(int64_t size, std::string *reason) = 0;
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/* Process chunk of data
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* @param buf the data buffer.
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* @param cnt byte count.
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* @param reason[output] set to error message in case of error.
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* @return false for error (file_scan will return), true if ok.
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*/
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virtual bool data(const char *buf, int cnt, std::string* reason) = 0;
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virtual bool data(const char *buf, int cnt, std::string *reason) = 0;
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virtual void setUpstream(FileScanUpstream*) {}
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};
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};
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bool file_scan(const std::string& filename, FileScanDo* doer, std::string *reason = 0);
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/* Same but only process count cnt from offset offs. Set cnt to size_t(-1)
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/** Open and read file, calling the FileScanDo data() method for each chunk.
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* for no limit */
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*
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* @param filename File name. Use empty value for stdin
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* @param doer the data processor. The init() method will be called
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* initially witht a lower bound of the data size (may be used to
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* reserve a buffer), or with a 0 size if nothing is known about the
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* size. The data() method will be called for every chunk of data
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* read.
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* @param offs Start offset. If not zero, will disable decompression
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* (set to -1 to start at 0 with no decompression).
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* @param cnt Max bytes in output. Set cnt to -1 for no limit.
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* @param[output] md5p If not null, points to a string to store the hex ascii
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* md5 of the uncompressed data.
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* @param[output] reason If not null, points to a string for storing an
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* error message if the return value is false.
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* @return true if the operation ended normally, else false.
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*/
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bool file_scan(const std::string& fn, FileScanDo* doer, int64_t offs, size_t cnt,
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bool file_scan(const std::string& fn, FileScanDo* doer, int64_t startoffs,
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int64_t cnttoread, std::string *reason
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#ifdef READFILE_ENABLE_MD5
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, std::string *md5p
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#endif
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);
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/** Same as above, not offset/cnt/md5 */
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bool file_scan(const std::string& filename, FileScanDo* doer,
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std::string *reason = 0);
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std::string *reason);
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/** Same as file_scan, from a memory buffer. No libz processing */
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bool string_scan(const char *data, size_t cnt, FileScanDo* doer,
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std::string *reason
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#ifdef READFILE_ENABLE_MD5
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, std::string *md5p
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#endif
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);
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#if defined(READFILE_ENABLE_MINIZ)
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/* Process a zip archive member */
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bool file_scan(const std::string& filename, const std::string& membername,
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FileScanDo* doer, std::string *reason);
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bool string_scan(const char* data, size_t cnt, const std::string& membername,
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FileScanDo* doer, std::string *reason);
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#endif
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/**
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/**
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* Read file into string.
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* Read file into string.
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* @return true for ok, false else
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* @return true for ok, false else
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*/
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*/
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bool file_to_string(const std::string& filename, std::string& data, std::string *reason = 0);
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bool file_to_string(const std::string& filename, std::string& data,
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std::string *reason = 0);
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/** Read file chunk into string. Set cnt to size_t(-1) for whole file */
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/** Read file chunk into string. Set cnt to -1 for going to
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* eof, offs to -1 for going from the start without decompression */
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bool file_to_string(const std::string& filename, std::string& data,
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bool file_to_string(const std::string& filename, std::string& data,
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int64_t offs, size_t cnt, std::string *reason = 0);
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int64_t offs, size_t cnt, std::string *reason = 0);
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#endif /* _READFILE_H_INCLUDED_ */
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#endif /* _READFILE_H_INCLUDED_ */
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