libgcal is an ANSI C library that does allow communication with google calendar and contacts, useful if you need to support this in a C or C++ application. Currently, libgcal implements: - authentication - get all events/contacts - atom stream parsing - access to individual events/contacts - add/delete/edit using gcal objects - add/delete/edit using raw XML - query for updated events/contacts - timezone - contact photo download/upload What is missing: batch commit, calendar (creation of recurrent events), support other calendars (only the main calendar is currently supported).
WWW: https://code.google.com/p/libgcal/
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