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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [sparseset.h] - Rev 283
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/* SparseSet implementation. Copyright (C) 2007 Free Software Foundation, Inc. Contributed by Peter Bergner <bergner@vnet.ibm.com> This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #ifndef GCC_SPARSESET_H #define GCC_SPARSESET_H #include <assert.h> #define SPARSESET_ELT_BITS ((unsigned) HOST_BITS_PER_WIDEST_FAST_INT) #define SPARSESET_ELT_TYPE unsigned int /* Data Structure used for the SparseSet representation. */ typedef struct sparseset_def { SPARSESET_ELT_TYPE *dense; /* Dense array. */ SPARSESET_ELT_TYPE *sparse; /* Sparse array. */ SPARSESET_ELT_TYPE members; /* Number of elements. */ SPARSESET_ELT_TYPE size; /* Maximum number of elements. */ SPARSESET_ELT_TYPE iter; /* Iterator index. */ unsigned char iter_inc; /* Iteration increment amount. */ bool iterating; SPARSESET_ELT_TYPE elms[2]; /* Combined dense and sparse arrays. */ } *sparseset; #define sparseset_free(MAP) free(MAP) extern sparseset sparseset_alloc (SPARSESET_ELT_TYPE n_elms); extern void sparseset_clear_bit (sparseset, SPARSESET_ELT_TYPE); extern void sparseset_copy (sparseset, sparseset); extern void sparseset_and (sparseset, sparseset, sparseset); extern void sparseset_and_compl (sparseset, sparseset, sparseset); extern void sparseset_ior (sparseset, sparseset, sparseset); extern bool sparseset_equal_p (sparseset, sparseset); /* Operation: S = {} Clear the set of all elements. */ static inline void sparseset_clear (sparseset s) { s->members = 0; s->iterating = false; } /* Return the number of elements currently in the set. */ static inline SPARSESET_ELT_TYPE sparseset_cardinality (sparseset s) { return s->members; } /* Return the maximum number of elements this set can hold. */ static inline SPARSESET_ELT_TYPE sparseset_size (sparseset s) { return s->size; } /* Return true if e is a member of the set S, otherwise return false. */ static inline bool sparseset_bit_p (sparseset s, SPARSESET_ELT_TYPE e) { SPARSESET_ELT_TYPE idx; gcc_assert (e < s->size); idx = s->sparse[e]; return idx < s->members && s->dense[idx] == e; } /* Low level insertion routine not meant for use outside of sparseset.[ch]. Assumes E is valid and not already a member of the set S. */ static inline void sparseset_insert_bit (sparseset s, SPARSESET_ELT_TYPE e, SPARSESET_ELT_TYPE idx) { s->sparse[e] = idx; s->dense[idx] = e; } /* Operation: S = S + {e} Insert E into the set S, if it isn't already a member. */ static inline void sparseset_set_bit (sparseset s, SPARSESET_ELT_TYPE e) { if (!sparseset_bit_p (s, e)) sparseset_insert_bit (s, e, s->members++); } /* Return and remove an arbitrary element from the set S. */ static inline SPARSESET_ELT_TYPE sparseset_pop (sparseset s) { SPARSESET_ELT_TYPE mem = s->members; gcc_assert (mem != 0); s->members = mem - 1; return s->dense[mem]; } static inline void sparseset_iter_init (sparseset s) { s->iter = 0; s->iter_inc = 1; s->iterating = true; } static inline bool sparseset_iter_p (sparseset s) { if (s->iterating && s->iter < s->members) return true; else return s->iterating = false; } static inline SPARSESET_ELT_TYPE sparseset_iter_elm (sparseset s) { return s->dense[s->iter]; } static inline void sparseset_iter_next (sparseset s) { s->iter += s->iter_inc; s->iter_inc = 1; } #define EXECUTE_IF_SET_IN_SPARSESET(SPARSESET, ITER) \ for (sparseset_iter_init (SPARSESET); \ sparseset_iter_p (SPARSESET) \ && (((ITER) = sparseset_iter_elm (SPARSESET)) || 1); \ sparseset_iter_next (SPARSESET)) #endif /* GCC_SPARSESET_H */
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