2 * FML interpreter. Europagate, 1995
5 * Revision 1.1 1995/02/06 13:48:09 adam
16 struct fml_sym_info info;
25 struct fml_sym **array;
28 struct fml_sym_tab *fml_sym_open (void)
30 struct fml_sym_tab *tab;
33 tab = malloc (sizeof (*tab));
38 tab->array = malloc (sizeof(*tab->array) * tab->hash);
44 for (i = 0; i<tab->hash; i++)
49 void fml_sym_close (struct fml_sym_tab **tabp)
51 struct fml_sym *sym, *sym1;
53 for (i = (*tabp)->hash; --i >= 0; )
54 for (sym = (*tabp)->array[i]; sym; sym = sym1)
64 void fml_sym_push (struct fml_sym_tab *tab)
69 void fml_sym_pop (struct fml_sym_tab *tab, void (*ph)(struct fml_sym_info *i))
74 assert (tab->level > 0);
75 for (i = tab->hash; --i >= 0; )
80 if ((*fsp)->level == tab->level)
98 static unsigned fml_sym_hash (const char *s, unsigned hash)
107 static struct fml_sym_info *sym_add (struct fml_sym_tab *tab,
108 const char *s, int level)
112 struct fml_sym **sym_entry;
114 cp = malloc (strlen(s)+1);
119 sym = malloc (sizeof (*sym));
125 sym_entry = tab->array + fml_sym_hash (s, tab->hash);
127 sym->next = *sym_entry;
133 struct fml_sym_info *fml_sym_add (struct fml_sym_tab *tab, const char *s)
135 return sym_add (tab, s, 0);
138 struct fml_sym_info *fml_sym_add_local (struct fml_sym_tab *tab, const char *s)
140 return sym_add (tab, s, tab->level);
143 static struct fml_sym_info *sym_lookup (struct fml_sym_tab *tab,
144 const char *s, int level)
147 struct fml_sym *sym0 = NULL;
148 struct fml_sym **sym_entry;
150 sym_entry = tab->array + fml_sym_hash (s, tab->hash);
151 for (sym = *sym_entry; sym; sym = sym->next)
152 if (!strcmp (sym->name, s))
153 if (!sym0 || sym->level > sym0->level)
157 assert (sym0->level <= tab->level);
158 if (level && sym0->level != level)
166 struct fml_sym_info *fml_sym_lookup (struct fml_sym_tab *tab, const char *s)
168 return sym_lookup (tab, s, 0);
171 struct fml_sym_info *fml_sym_lookup_local (struct fml_sym_tab *tab,
174 return sym_lookup (tab, s, tab->level);