Added some relevant #defines copied from extern\libmv\third_party\msinttypes to BLI_sys_types.h so they can be used in blenlib. Made smallhash.c use the BLI_sys_types.h include rather than including <stdint.h> directly
- use magic numbers based on uintptr max, not uint max, to avoid possible collisions with real pointer values on 64bit systems.
- comment BLI_smallhash_remove for now, its not used.
- added smallhash_val_is_used replacing ELEM() checks
- updated docs
- remove static array used only for copying (use alloca on resize)
- set SMSTACKSIZE to one of the values in 'hashsizes' since the full available size was never used.
- ensure ~1.5x as many buckets as entries, was 3x which caused malloc's quite early on.
- BLI_smallhash_remove didnt decrement total entries.
- rename vars to match closer to ghash.
- smallhash_lookup returns NULL when no entry found.
- using a zero value key wasn't supported.
- no need to memset or calloc bucket arrays
- add asserts for unsupported conditions.
- added BLI_smallhash_lookup_p
Factorized a bit the code here, think it's more readable now... No performance enhancement though.
Reviewed by: campbellbarton
Differential Revision: https://developer.blender.org/D259
* add DM_to_bmesh_ex, DM_to_bmesh for converting a derived mesh to a BMesh (rather than a BMEditMesh)
* have a generic variable for allocsize: bm_mesh_allocsize_default, rather than copying the values about.
