Simplify and port recent bool vector changes.
* configure.ac (BITSIZEOF_SIZE_T, SIZEOF_SIZE_T): New symbols to configure. * src/alloc.c (ROUNDUP): Move here from lisp.h, since it's now used only in this file. Use a more-efficient implementation if the second argument is a power of 2. (ALIGN): Rewrite in terms of ROUNDUP. Make it a function. Remove no-longer-necessary compile-time checks. (bool_vector_exact_payload_bytes): New function. (bool_vector_payload_bytes): Remove 2nd arg; callers that need exact payload changed to call the new function. Do not assume that the arg or result fits in ptrdiff_t. (bool_vector_fill): New function. (Fmake_bool_vector): Use it. Don't assume bit counts fit in ptrdiff_t. (vroundup_ct): Don't assume arg fits in size_t. * src/category.c (SET_CATEGORY_SET): Remove. All callers now just invoke set_category_set. (set_category_set): 2nd arg is now EMACS_INT and 3rd is now bool. All callers changed. Use bool_vector_set. * src/category.h (XCATEGORY_SET): Remove; no longer needed. (CATEGORY_MEMBER): Now a function. Rewrite in terms of bool_vector_bitref. * src/data.c (Faref): Use bool_vector_ref. (Faset): Use bool_vector_set. (bits_word_to_host_endian): Don't assume you can shift by CHAR_BIT. (Fbool_vector_not, Fbool_vector_count_matches) (Fbool_vector_count_matches_at): Don't assume CHAR_BIT == 8. * src/fns.c (concat): Use bool_vector_ref. (Ffillarray): Use bool_vector_fill. (mapcar1): Use bool_vector_ref. (sxhash_bool_vector): Hash words, not bytes. * src/lisp.h (BOOL_VECTOR_BITS_PER_CHAR): Now a macro as well as a constant, since it's now used in #if. (bits_word, BITS_WORD_MAX, BITS_PER_BITS_WORD): Fall back on unsigned char on unusual architectures, so that we no longer assume that the number of bits per bits_word is a power of two or is a multiple of 8 or of CHAR_BIT. (Qt): Add forward decl. (struct Lisp_Bool_Vector): Don't assume EMACS_INT is aligned at least as strictly as bits_word. (bool_vector_data, bool_vector_uchar_data): New accessors. All data structure accesses changed to use them. (bool_vector_words, bool_vector_bitref, bool_vector_ref) (bool_vector_set): New functions. (bool_vector_fill): New decl. (ROUNDUP): Move to alloc.c as described above.
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