123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
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/* Simple bitmaps.
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Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* It's not clear yet whether using bitmap.[ch] will be a win.
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It should be straightforward to convert so for now we keep things simple
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while more important issues are dealt with. */
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#define SBITMAP_ELT_BITS HOST_BITS_PER_WIDE_INT
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#define SBITMAP_ELT_TYPE unsigned HOST_WIDE_INT
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typedef struct simple_bitmap_def {
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/* Number of bits. */
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int n_bits;
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/* Size in elements. */
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int size;
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/* Size in bytes. */
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int bytes;
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/* The elements. */
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SBITMAP_ELT_TYPE elms[1];
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} *sbitmap;
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typedef SBITMAP_ELT_TYPE *sbitmap_ptr;
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/* Return the set size needed for N elements. */
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#define SBITMAP_SET_SIZE(n) (((n) + SBITMAP_ELT_BITS - 1) / SBITMAP_ELT_BITS)
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/* set bit number bitno in the bitmap */
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#define SET_BIT(bitmap, bitno) \
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((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] \
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|= (SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS)
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/* test if bit number bitno in the bitmap is set */
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#define TEST_BIT(bitmap, bitno) \
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((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] >> (bitno) % SBITMAP_ELT_BITS & 1)
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/* reset bit number bitno in the bitmap */
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#define RESET_BIT(bitmap, bitno) \
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((bitmap)->elms [(bitno) / SBITMAP_ELT_BITS] \
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&= ~((SBITMAP_ELT_TYPE) 1 << (bitno) % SBITMAP_ELT_BITS))
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/* Loop over all elements of SBITSET, starting with MIN. */
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#define EXECUTE_IF_SET_IN_SBITMAP(SBITMAP, MIN, N, CODE) \
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do { \
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unsigned int bit_num_ = (MIN) % (unsigned) SBITMAP_ELT_BITS; \
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unsigned int word_num_ = (MIN) / (unsigned) SBITMAP_ELT_BITS; \
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unsigned int size_ = (SBITMAP)->size; \
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SBITMAP_ELT_TYPE *ptr_ = (SBITMAP)->elms; \
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\
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while (word_num_ < size_) \
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{ \
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SBITMAP_ELT_TYPE word_ = ptr_[word_num_]; \
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if (word_ != 0) \
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{ \
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for (; bit_num_ < SBITMAP_ELT_BITS; ++bit_num_) \
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{ \
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SBITMAP_ELT_TYPE mask_ = (SBITMAP_ELT_TYPE)1 << bit_num_; \
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if ((word_ & mask_) != 0) \
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{ \
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word_ &= ~mask_; \
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(N) = word_num_ * SBITMAP_ELT_BITS + bit_num_; \
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CODE; \
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if (word_ == 0) \
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break; \
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} \
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} \
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} \
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bit_num_ = 0; \
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word_num_++; \
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} \
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} while (0)
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#define sbitmap_free(map) free(map)
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#define sbitmap_vector_free(vec) free(vec)
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extern void dump_sbitmap PROTO ((FILE *, sbitmap));
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extern void dump_sbitmap_vector PROTO ((FILE *, const char *, const char *,
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sbitmap *, int));
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extern sbitmap sbitmap_alloc PROTO ((int));
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extern sbitmap *sbitmap_vector_alloc PROTO ((int, int));
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extern void sbitmap_copy PROTO ((sbitmap, sbitmap));
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extern void sbitmap_zero PROTO ((sbitmap));
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extern void sbitmap_ones PROTO ((sbitmap));
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extern void sbitmap_vector_zero PROTO ((sbitmap *, int));
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extern void sbitmap_vector_ones PROTO ((sbitmap *, int));
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extern int sbitmap_union_of_diff PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
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extern void sbitmap_difference PROTO ((sbitmap, sbitmap, sbitmap));
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extern void sbitmap_not PROTO ((sbitmap, sbitmap));
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extern int sbitmap_a_or_b_and_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
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extern int sbitmap_a_and_b_or_c PROTO ((sbitmap, sbitmap, sbitmap, sbitmap));
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extern int sbitmap_a_and_b PROTO ((sbitmap, sbitmap, sbitmap));
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extern int sbitmap_a_or_b PROTO ((sbitmap, sbitmap, sbitmap));
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struct int_list;
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extern void sbitmap_intersect_of_predsucc PROTO ((sbitmap, sbitmap *,
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int, struct int_list **));
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#define sbitmap_intersect_of_predecessors sbitmap_intersect_of_predsucc
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#define sbitmap_intersect_of_successors sbitmap_intersect_of_predsucc
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extern void sbitmap_union_of_predsucc PROTO ((sbitmap, sbitmap *, int,
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struct int_list **));
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#define sbitmap_union_of_predecessors sbitmap_union_of_predsucc
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#define sbitmap_union_of_successors sbitmap_union_of_predsucc
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