/[bison]/bison/src/derives.c
ViewVC logotype

Diff of /bison/src/derives.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1.36 by akim, Wed Jul 31 19:49:52 2002 UTC revision 1.37 by akim, Thu Aug 1 18:13:29 2002 UTC
# Line 1  Line 1 
1  /* Match rules with nonterminals for bison,  /* Match rules with nonterminals for bison,
2     Copyright 1984, 1989, 2000, 2001, 2002  Free Software Foundation, Inc.     Copyright (C) 1984, 1989, 2000, 2001, 2002  Free Software Foundation, Inc.
3    
4     This file is part of Bison, the GNU Compiler Compiler.     This file is part of Bison, the GNU Compiler Compiler.
5    
# Line 30  Line 30 
30  typedef struct rule_list_s  typedef struct rule_list_s
31  {  {
32    struct rule_list_s *next;    struct rule_list_s *next;
33    rule_number_t value;    rule_t *value;
34  } rule_list_t;  } rule_list_t;
35    
36  rule_number_t **derives = NULL;  rule_t ***derives = NULL;
37    
38  static void  static void
39  print_derives (void)  print_derives (void)
# Line 44  print_derives (void) Line 44  print_derives (void)
44    
45    for (i = ntokens; i < nsyms; i++)    for (i = ntokens; i < nsyms; i++)
46      {      {
47        rule_number_t *rp;        rule_t **rp;
48        fprintf (stderr, "\t%s derives\n", symbols[i]->tag);        fprintf (stderr, "\t%s derives\n", symbols[i]->tag);
49        for (rp = derives[i]; *rp >= 0; rp++)        for (rp = derives[i]; *rp; ++rp)
50          {          {
51            fprintf (stderr, "\t\t%3d ", *rp);            fprintf (stderr, "\t\t%3d ", (*rp)->user_number);
52            rule_rhs_print (&rules[*rp], stderr);            rule_rhs_print (*rp, stderr);
53          }          }
54      }      }
55    
# Line 58  print_derives (void) Line 58  print_derives (void)
58    
59    
60  void  void
61  set_derives (void)  derives_compute (void)
62  {  {
63    symbol_number_t i;    symbol_number_t i;
64    int r;    int r;
65    rule_number_t *q;    rule_t **q;
66    
67    /* DSET[NTERM] -- A linked list of the numbers of the rules whose    /* DSET[NTERM] -- A linked list of the numbers of the rules whose
68       LHS is NTERM.  */       LHS is NTERM.  */
# Line 79  set_derives (void) Line 79  set_derives (void)
79        rule_list_t *p = &delts[r];        rule_list_t *p = &delts[r];
80        /* A new LHS is found.  */        /* A new LHS is found.  */
81        p->next = dset[lhs];        p->next = dset[lhs];
82        p->value = r;        p->value = &rules[r];
83        dset[lhs] = p;        dset[lhs] = p;
84      }      }
85    
86    /* DSET contains what we need under the form of a linked list.  Make    /* DSET contains what we need under the form of a linked list.  Make
87       it a single array.  */       it a single array.  */
88    
89    derives = XCALLOC (rule_number_t *, nvars) - ntokens;    derives = XCALLOC (rule_t **, nvars) - ntokens;
90    q = XCALLOC (rule_number_t, nvars + int_of_rule_number (nrules));    q = XCALLOC (rule_t *, nvars + int_of_rule_number (nrules));
91    
92    for (i = ntokens; i < nsyms; i++)    for (i = ntokens; i < nsyms; i++)
93      {      {
# Line 98  set_derives (void) Line 98  set_derives (void)
98            *q++ = p->value;            *q++ = p->value;
99            p = p->next;            p = p->next;
100          }          }
101        *q++ = -1;        *q++ = NULL;
102      }      }
103    
104    if (trace_flag & trace_sets)    if (trace_flag & trace_sets)
# Line 110  set_derives (void) Line 110  set_derives (void)
110    
111    
112  void  void
113  free_derives (void)  derives_free (void)
114  {  {
115    XFREE (derives[ntokens]);    XFREE (derives[ntokens]);
116    XFREE (derives + ntokens);    XFREE (derives + ntokens);

Legend:
Removed from v.1.36  
changed lines
  Added in v.1.37

savannah-hackers-public@gnu.org
ViewVC Help
Powered by ViewVC 1.1.26