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2010-07-06du: Hash with a mechanism that's simpler and takes less memory.Paul Eggert
* gl/lib/dev-map.c, gl/lib/dev-map.h, gl/modules/dev-map: Remove. * gl/lib/ino-map.c, gl/lib/ino-map.h, gl/modules/ino-map: New files. * gl/modules/dev-map-tests, gl/tests/test-dev-map.c: Remove. * gl/modules/ino-map-tests, gl/tests/test-ino-map.c: New files. * gl/lib/di-set.h (struct di_set): Renamed from struct di_set_state, and now private. All uses changed. (_ATTRIBUTE_NONNULL_): Don't assume C99. (di_set_alloc): Renamed from di_set_init, with no size arg. Now allocates the object rather than initializing it. For now, this no longer takes an initial size; we can put this back later if it is needed. * gl/lib/di-set.c: Include hash.h, ino-map.h, and limits.h instead of stdio.h, assert.h, stdint.h, sys/types.h (di-set.h includes that now), sys/stat.h, and verify.h. (N_DEV_BITS_4, N_INO_BITS_4, N_DEV_BITS_8, N_INO_BITS_8): Remove. (struct dev_ino_4, struct dev_ino_8, struct dev_ino_full): Remove. (enum di_mode): Remove. (hashint): New typedef. (HASHINT_MAX, LARGE_INO_MIN): New macros. (struct di_ent): Now maps a dev_t to a inode set, instead of containing a union. (struct dev_map_ent): Remove. (struct di_set): New type. (is_encoded_ptr, decode_ptr, di_ent_create): Remove. (di_ent_hash, di_ent_compare, di_ent_free, di_set_alloc, di_set_free): (di_set_insert): Adjust to new representation. (di_ino_hash, map_device, map_inode_number): New functions. * gl/modules/di-set (Depends-on): Replace dev-map with ino-map. Remove 'verify'. * gl/tests/test-di-set.c: Adjust to the above changes to API. * src/du.c (INITIAL_DI_SET_SIZE): Remove. (hash_ins, main): Adjust to new di-set API.