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ZIP_REGISTER_PROGRESS_CALLBACK_WITH_STATE(3) FreeBSD Library Functions Manual ZIP_REGISTER_PROGRESS_CALLBACK_WITH_STATE(3)

zip_register_progress_callback_with_state
provide updates during zip_close

libzip (-lzip)

#include <zip.h>
typedef void (*zip_progress_callback)(zip_t *, double, void *);
void
zip_register_progress_callback_with_state(zip_t *archive, double precision, zip_progress_callback callback, void (*ud_free)(void *), void *ud);

The zip_register_progress_callback_with_state() function registers a callback function callback for the zip archive archive. The precision argument is a double in the range from 0.00 to 1.0 that defines the smallest change for which the callback should be called (to avoid too frequent calls). The ud_free function is called during cleanup for deleting the userdata supplied in ud.
The callback function is called during zip_close(3) in regular intervals (after every zip archive entry that's completely written to disk, and while writing data for entries) with zip archive archive, the current progression state as a double, and the user-provided user-data ud as arguments. The progression state is a double in the range from 0.0 to 1.0. This can be used to provide progress indicators for user interfaces.

libzip(3), zip_close(3)

zip_register_progress_callback_with_state() was added in libzip 1.3.0.

Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>
December 18, 2017 FreeBSD 12.0-RELEASE

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