/[gcl]/gcl/binutils/include/hashtab.h
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revision 1.1.1.1 by camm, Fri Aug 9 05:36:38 2002 UTC revision 1.1.1.1.20.1 by camm, Fri Sep 30 02:10:24 2005 UTC
# Line 1  Line 1 
1  /* An expandable hash tables datatype.    /* An expandable hash tables datatype.  
2     Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.     Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
3     Contributed by Vladimir Makarov (vmakarov@cygnus.com).     Contributed by Vladimir Makarov (vmakarov@cygnus.com).
4    
5  This program is free software; you can redistribute it and/or modify  This program is free software; you can redistribute it and/or modify
# Line 76  typedef PTR (*htab_alloc) PARAMS ((size_ Line 76  typedef PTR (*htab_alloc) PARAMS ((size_
76  /* We also need a free() routine.  */  /* We also need a free() routine.  */
77  typedef void (*htab_free) PARAMS ((PTR));  typedef void (*htab_free) PARAMS ((PTR));
78    
79    /* Memory allocation and deallocation; variants which take an extra
80       argument.  */
81    typedef PTR (*htab_alloc_with_arg) PARAMS ((void *, size_t, size_t));
82    typedef void (*htab_free_with_arg) PARAMS ((void *, void *));
83    
84  /* Hash tables are of the following type.  The structure  /* Hash tables are of the following type.  The structure
85     (implementation) of this type is not needed for using the hash     (implementation) of this type is not needed for using the hash
86     tables.  All work with hash table should be executed only through     tables.  All work with hash table should be executed only through
87     functions mentioned below. */     functions mentioned below.  The size of this structure is subject to
88       change.  */
89    
90  struct htab GTY(())  struct htab GTY(())
91  {  {
# Line 93  struct htab GTY(()) Line 99  struct htab GTY(())
99    htab_del del_f;    htab_del del_f;
100    
101    /* Table itself.  */    /* Table itself.  */
102    PTR * GTY ((use_param (""), length ("%h.size"))) entries;    PTR * GTY ((use_param, length ("%h.size"))) entries;
103    
104    /* Current size (in entries) of the hash table */    /* Current size (in entries) of the hash table.  */
105    size_t size;    size_t size;
106    
107    /* Current number of elements including also deleted elements */    /* Current number of elements including also deleted elements.  */
108    size_t n_elements;    size_t n_elements;
109    
110    /* Current number of deleted elements in the table */    /* Current number of deleted elements in the table.  */
111    size_t n_deleted;    size_t n_deleted;
112    
113    /* The following member is used for debugging. Its value is number    /* The following member is used for debugging. Its value is number
# Line 115  struct htab GTY(()) Line 121  struct htab GTY(())
121    /* Pointers to allocate/free functions.  */    /* Pointers to allocate/free functions.  */
122    htab_alloc alloc_f;    htab_alloc alloc_f;
123    htab_free free_f;    htab_free free_f;
124    
125      /* Alternate allocate/free functions, which take an extra argument.  */
126      PTR GTY((skip)) alloc_arg;
127      htab_alloc_with_arg alloc_with_arg_f;
128      htab_free_with_arg free_with_arg_f;
129    
130      /* Current size (in entries) of the hash table, as an index into the
131         table of primes.  */
132      unsigned int size_prime_index;
133  };  };
134    
135  typedef struct htab *htab_t;  typedef struct htab *htab_t;
# Line 128  extern htab_t  htab_create_alloc       PARAMS ( Line 143  extern htab_t  htab_create_alloc       PARAMS (
143                                                   htab_eq, htab_del,                                                   htab_eq, htab_del,
144                                                   htab_alloc, htab_free));                                                   htab_alloc, htab_free));
145    
146    extern htab_t   htab_create_alloc_ex    PARAMS ((size_t, htab_hash,
147                                                        htab_eq, htab_del,
148                                                        PTR, htab_alloc_with_arg,
149                                                        htab_free_with_arg));
150    
151  /* Backward-compatibility functions.  */  /* Backward-compatibility functions.  */
152  extern htab_t htab_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));  extern htab_t htab_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));
153  extern htab_t htab_try_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));  extern htab_t htab_try_create PARAMS ((size_t, htab_hash, htab_eq, htab_del));
154    
155    extern void     htab_set_functions_ex   PARAMS ((htab_t, htab_hash,
156                                                     htab_eq, htab_del,
157                                                     PTR, htab_alloc_with_arg,
158                                                     htab_free_with_arg));
159    
160  extern void     htab_delete     PARAMS ((htab_t));  extern void     htab_delete     PARAMS ((htab_t));
161  extern void     htab_empty      PARAMS ((htab_t));  extern void     htab_empty      PARAMS ((htab_t));
162    
# Line 145  extern PTR     *htab_find_slot_with_hash Line 170  extern PTR     *htab_find_slot_with_hash
170                                                     enum insert_option));                                                     enum insert_option));
171  extern void     htab_clear_slot PARAMS ((htab_t, void **));  extern void     htab_clear_slot PARAMS ((htab_t, void **));
172  extern void     htab_remove_elt PARAMS ((htab_t, void *));  extern void     htab_remove_elt PARAMS ((htab_t, void *));
173    extern void     htab_remove_elt_with_hash PARAMS ((htab_t, void *, hashval_t));
174    
175  extern void     htab_traverse   PARAMS ((htab_t, htab_trav, void *));  extern void     htab_traverse   PARAMS ((htab_t, htab_trav, void *));
176    extern void     htab_traverse_noresize  PARAMS ((htab_t, htab_trav, void *));
177    
178  extern size_t   htab_size       PARAMS ((htab_t));  extern size_t   htab_size       PARAMS ((htab_t));
179  extern size_t   htab_elements   PARAMS ((htab_t));  extern size_t   htab_elements   PARAMS ((htab_t));
# Line 161  extern htab_eq htab_eq_pointer; Line 188  extern htab_eq htab_eq_pointer;
188  /* A hash function for null-terminated strings.  */  /* A hash function for null-terminated strings.  */
189  extern hashval_t htab_hash_string PARAMS ((const PTR));  extern hashval_t htab_hash_string PARAMS ((const PTR));
190    
191    /* An iterative hash function for arbitrary data.  */
192    extern hashval_t iterative_hash PARAMS ((const PTR, size_t, hashval_t));
193    /* Shorthand for hashing something with an intrinsic size.  */
194    #define iterative_hash_object(OB,INIT) iterative_hash (&OB, sizeof (OB), INIT)
195    
196  #ifdef __cplusplus  #ifdef __cplusplus
197  }  }
198  #endif /* __cplusplus */  #endif /* __cplusplus */

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