Return more descriptive data from Fgarbage_collect.
Suggested by Stefan Monnier in http://lists.gnu.org/archive/html/emacs-devel/2012-07/msg00369.html. * src/alloc.c (bounded_number): New function. (total_buffers, total_vectors): New variable. (total_string_size): Rename to total_string_bytes, adjust users. (total_vector_size): Rename to total_vector_bytes, adjust users. (sweep_vectors): Account total_vectors and total_vector_bytes. (Fgarbage_collect): New return value. Adjust documentation. (gc_sweep): Account total_buffers. (Fmemory_free, Fmemory_use_counts): Use bounded_number. (VECTOR_SIZE): Remove. * src/data.c (Qfloat, Qvector, Qsymbol, Qstring, Qcons): Make global. (Qinterval, Qmisc): New symbols. (syms_of_data): Initialize them. * src/lisp.h (Qinterval, Qsymbol, Qstring, Qmisc, Qvector, Qfloat) (Qcons, Qbuffer): New declarations. * lisp/emacs-lisp/chart.el (chart-emacs-storage): Change to reflect new format of data returned by Fgarbage_collect.
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