1 /* $Id: reader.c,v 1.47 2014/04/09 21:09:27 tom Exp $ */
5 /* The line size must be a positive integer. One hundred was chosen */
6 /* because few lines in Yacc input grammars exceed 100 characters. */
7 /* Note that if a line exceeds LINESIZE characters, the line buffer */
8 /* will be expanded to accomodate it. */
19 /* the maximum number of arguments (inherited attributes) to a non-terminal */
20 /* this is a hard limit, but seems more than adequate */
23 static void start_rule(bucket *bp, int s_lineno);
25 static void copy_destructor(void);
26 static char *process_destructor_XX(char *code, char *tag);
30 static int cinc, cache_size;
33 static int tagmax, havetags;
34 static char **tag_table;
44 static char last_was_action;
47 static bucket **pitem;
52 static size_t name_pool_size;
53 static char *name_pool;
55 char line_format[] = "#line %d \"%s\"\n";
61 int destructor = 0; /* =1 if at least one %destructor */
63 static bucket *default_destructor[3] =
66 #define UNTYPED_DEFAULT 0
67 #define TYPED_DEFAULT 1
68 #define TYPE_SPECIFIED 2
71 lookup_type_destructor(char *tag)
73 char name[1024] = "\0";
74 bucket *bp, **bpp = &default_destructor[TYPE_SPECIFIED];
76 while ((bp = *bpp) != NULL)
83 *bpp = bp = make_bucket(strcat(strcpy(name, tag), " destructor"));
88 #endif /* defined(YYBTYACC) */
94 if (cinc >= cache_size)
97 cache = TREALLOC(char, cache, cache_size);
100 cache[cinc] = (char)c;
107 FILE *f = input_file;
111 if (saw_eof || (c = getc(f)) == EOF)
123 if (line == 0 || linesize != (LINESIZE + 1))
127 linesize = LINESIZE + 1;
128 line = TMALLOC(char, linesize);
141 linesize += LINESIZE;
142 line = TREALLOC(char, line, linesize);
167 p = TMALLOC(char, s - line + 1);
172 while ((*t++ = *s++) != '\n')
182 int st_lineno = lineno;
183 char *st_line = dup_line();
184 char *st_cptr = st_line + (cptr - line);
189 if (*s == '*' && s[1] == '/')
199 unterminated_comment(st_lineno, st_line, st_cptr);
253 else if (s[1] == '/')
270 static struct keyword
276 { "binary", NONASSOC },
277 #if defined(YYBTYACC)
278 { "destructor", DESTRUCTOR },
280 { "expect", EXPECT },
281 { "expect-rr", EXPECT_RR },
284 { "lex-param", LEX_PARAM },
285 #if defined(YYBTYACC)
286 { "locations", LOCATIONS },
288 { "nonassoc", NONASSOC },
289 { "parse-param", PARSE_PARAM },
290 { "pure-parser", PURE_PARSER },
295 { "token-table", TOKEN_TABLE },
298 { "yacc", POSIX_YACC },
303 compare_keys(const void *a, const void *b)
305 const struct keyword *p = (const struct keyword *)a;
306 const struct keyword *q = (const struct keyword *)b;
307 return strcmp(p->name, q->name);
338 /* treat keywords spelled with '_' as if it were '-' */
349 if ((key = bsearch(cache, keywords,
350 sizeof(keywords) / sizeof(*key),
351 sizeof(*key), compare_keys)))
359 if (c == '%' || c == '\\')
370 syntax_error(lineno, line, t_cptr);
377 FILE *f = output_file;
383 syntax_error(lineno, line, cptr);
385 fprintf(f, "#ident \"");
405 copy_string(int quote)
407 struct mstring *temp = msnew();
409 int s_lineno = lineno;
410 char *s_line = dup_line();
411 char *s_cptr = s_line + (cptr - line - 1);
423 unterminated_string(s_lineno, s_line, s_cptr);
432 unterminated_string(s_lineno, s_line, s_cptr);
441 struct mstring *temp = msnew();
448 while ((c = *++cptr) != '\n')
451 if (c == '*' && cptr[1] == '/')
459 int c_lineno = lineno;
460 char *c_line = dup_line();
461 char *c_cptr = c_line + (cptr - line - 1);
469 if (c == '*' && *cptr == '/')
480 unterminated_comment(c_lineno, c_line, c_cptr);
492 int need_newline = 0;
493 int t_lineno = lineno;
494 char *t_line = dup_line();
495 char *t_cptr = t_line + (cptr - line - 2);
501 unterminated_text(t_lineno, t_line, t_cptr);
504 fprintf(f, line_format, lineno, input_file_name);
516 unterminated_text(t_lineno, t_line, t_cptr);
522 char *s = copy_string(c);
532 char *s = copy_comment();
559 puts_both(const char *s)
563 fputs(s, union_file);
579 int u_lineno = lineno;
580 char *u_line = dup_line();
581 char *u_cptr = u_line + (cptr - line - 6);
584 over_unionized(cptr - 6);
588 fprintf(text_file, line_format, lineno, input_file_name);
590 puts_both("#ifdef YYSTYPE\n");
591 puts_both("#undef YYSTYPE_IS_DECLARED\n");
592 puts_both("#define YYSTYPE_IS_DECLARED 1\n");
593 puts_both("#endif\n");
594 puts_both("#ifndef YYSTYPE_IS_DECLARED\n");
595 puts_both("#define YYSTYPE_IS_DECLARED 1\n");
596 puts_both("typedef union");
607 unterminated_union(u_lineno, u_line, u_cptr);
617 puts_both(" YYSTYPE;\n");
618 puts_both("#endif /* !YYSTYPE_IS_DECLARED */\n");
627 char *s = copy_string(c);
635 char *s = copy_comment();
647 * Keep a linked list of parameters
671 buf = TMALLOC(char, linesize);
674 for (i = 0; (c = *cptr++) != R_CURL; i++)
687 while (i > 0 && isspace(UCH(buf[i])))
693 while (i >= 0 && level > 0 && buf[i] != '[')
697 else if (buf[i] == '[')
710 while (i > 0 && (isalnum(UCH(buf[i])) ||
714 if (!isspace(UCH(buf[i])) && buf[i] != '*')
719 p = TMALLOC(param, 1);
722 p->type2 = strdup(buf + type2);
727 p->name = strdup(buf + name);
755 syntax_error(lineno, line, cptr);
761 if (c >= '0' && c <= '9')
763 if (c >= 'A' && c <= 'F')
764 return (c - 'A' + 10);
765 if (c >= 'a' && c <= 'f')
766 return (c - 'a' + 10);
778 int s_lineno = lineno;
779 char *s_line = dup_line();
780 char *s_cptr = s_line + (cptr - line);
790 unterminated_string(s_lineno, s_line, s_cptr);
793 char *c_cptr = cptr - 1;
801 unterminated_string(s_lineno, s_line, s_cptr);
816 n = (n << 3) + (c - '0');
820 n = (n << 3) + (c - '0');
825 illegal_character(c_cptr);
832 if (n < 0 || n >= 16)
833 illegal_character(c_cptr);
838 if (i < 0 || i >= 16)
843 illegal_character(c_cptr);
876 s = TMALLOC(char, n);
879 for (i = 0; i < n; ++i)
888 for (i = 0; i < n; ++i)
891 if (c == '\\' || c == cache[0])
925 cachec(((c >> 6) & 7) + '0');
926 cachec(((c >> 3) & 7) + '0');
927 cachec((c & 7) + '0');
941 if (n == 1 && bp->value == UNDEFINED)
949 is_reserved(char *name)
953 if (strcmp(name, ".") == 0 ||
954 strcmp(name, "$accept") == 0 ||
955 strcmp(name, "$end") == 0)
958 if (name[0] == '$' && name[1] == '$' && isdigit(UCH(name[2])))
961 while (isdigit(UCH(*s)))
976 for (c = *cptr; IS_IDENT(c); c = *++cptr)
980 if (is_reserved(cache))
981 used_reserved(cache);
983 return (lookup(cache));
993 for (c = *cptr; isdigit(c); c = *++cptr)
994 n = (Value_t) (10 * n + (c - '0'));
1000 cache_tag(char *tag, size_t len)
1005 for (i = 0; i < ntags; ++i)
1007 if (strncmp(tag, tag_table[i], len) == 0 &&
1008 tag_table[i][len] == NUL)
1009 return (tag_table[i]);
1012 if (ntags >= tagmax)
1017 ? TREALLOC(char *, tag_table, tagmax)
1018 : TMALLOC(char *, tagmax));
1019 NO_SPACE(tag_table);
1022 s = TMALLOC(char, len + 1);
1025 strncpy(s, tag, len);
1027 tag_table[ntags++] = s;
1035 int t_lineno = lineno;
1036 char *t_line = dup_line();
1037 char *t_cptr = t_line + (cptr - line);
1043 if (!isalpha(c) && c != '_' && c != '$')
1044 illegal_tag(t_lineno, t_line, t_cptr);
1052 while (IS_IDENT(c));
1059 illegal_tag(t_lineno, t_line, t_cptr);
1064 return cache_tag(cache, (size_t) cinc);
1067 #if defined(YYBTYACC)
1073 while (isalnum(*cptr) || *cptr == '_' || *cptr == '$')
1075 return cache_tag(b, (size_t) (cptr - b));
1080 declare_tokens(int assoc)
1103 if (isalpha(c) || c == '_' || c == '.' || c == '$')
1105 else if (c == '\'' || c == '"')
1111 tokenized_start(bp->name);
1116 if (bp->tag && tag != bp->tag)
1117 retyped_warning(bp->name);
1123 if (bp->prec && prec != bp->prec)
1124 reprec_warning(bp->name);
1125 bp->assoc = (Assoc_t) assoc;
1135 value = get_number();
1136 if (bp->value != UNDEFINED && value != bp->value)
1137 revalued_warning(bp->name);
1147 * %expect requires special handling
1148 * as it really isn't part of the yacc
1149 * grammar only a flag for yacc proper.
1152 declare_expect(int assoc)
1156 if (assoc != EXPECT && assoc != EXPECT_RR)
1160 * Stay away from nextc - doesn't
1161 * detect EOL and will read to EOF.
1171 if (assoc == EXPECT)
1172 SRexpect = get_number();
1174 RRexpect = get_number();
1178 * Looking for number before EOL.
1179 * Spaces, tabs, and numbers are ok,
1180 * words, punc., etc. are syntax errors.
1182 else if (c == '\n' || isalpha(c) || !isspace(c))
1184 syntax_error(lineno, line, cptr);
1195 #if defined(YYBTYACC)
1197 declare_argtypes(bucket *bp)
1199 char *tags[MAXARGS];
1203 retyped_warning(bp->name);
1204 cptr++; /* skip open paren */
1211 syntax_error(lineno, line, cptr);
1212 tags[args++] = get_tag();
1219 cptr++; /* skip close paren */
1221 bp->argnames = TMALLOC(char *, args);
1222 NO_SPACE(bp->argnames);
1223 bp->argtags = CALLOC(sizeof(char *), args + 1);
1224 NO_SPACE(bp->argtags);
1227 bp->argtags[args] = tags[args];
1228 bp->argnames[args] = NULL;
1251 if (isalpha(c) || c == '_' || c == '.' || c == '$')
1254 #if defined(YYBTYACC)
1255 if (nextc() == L_PAREN)
1256 declare_argtypes(bp);
1261 else if (c == '\'' || c == '"')
1264 #if defined(YYBTYACC)
1273 if (bp->tag && tag != bp->tag)
1274 retyped_warning(bp->name);
1289 if (!isalpha(c) && c != '_' && c != '.' && c != '$')
1290 syntax_error(lineno, line, cptr);
1292 if (bp->class == TERM)
1293 terminal_start(bp->name);
1294 if (goal && goal != bp)
1295 restarted_warning();
1300 read_declarations(void)
1305 cache = TMALLOC(char, cache_size);
1314 syntax_error(lineno, line, cptr);
1315 switch (k = keyword())
1365 #if defined(YYBTYACC)
1377 /* noop for bison compatibility. byacc is already designed to be posix
1378 * yacc compatible. */
1385 initialize_grammar(void)
1390 pitem = TMALLOC(bucket *, maxitems);
1401 plhs = TMALLOC(bucket *, maxrules);
1408 rprec = TMALLOC(Value_t, maxrules);
1415 rassoc = TMALLOC(Assoc_t, maxrules);
1427 pitem = TREALLOC(bucket *, pitem, maxitems);
1436 plhs = TREALLOC(bucket *, plhs, maxrules);
1439 rprec = TREALLOC(Value_t, rprec, maxrules);
1442 rassoc = TREALLOC(Assoc_t, rassoc, maxrules);
1446 /* set immediately prior to where copy_args() could be called, and incremented by
1447 the various routines that will rescan the argument list as appropriate */
1448 static int rescan_lineno;
1449 #if defined(YYBTYACC)
1452 copy_args(int *alen)
1454 struct mstring *s = msnew();
1455 int depth = 0, len = 1;
1457 int a_lineno = lineno;
1458 char *a_line = dup_line();
1459 char *a_cptr = a_line + (cptr - line - 1);
1461 while ((c = *cptr++) != R_PAREN || depth || quote)
1463 if (c == ',' && !quote && !depth)
1476 unterminated_string(a_lineno, a_line, a_cptr);
1478 unterminated_arglist(a_lineno, a_line, a_cptr);
1495 else if (c == R_PAREN)
1497 else if (c == '\"' || c == '\'')
1508 parse_id(char *p, char **save)
1515 if (!isalpha(*p) && *p != '_')
1518 while (isalnum(*p) || *p == '_' || *p == '$')
1522 *save = cache_tag(b, (size_t) (p - b));
1528 parse_int(char *p, int *save)
1530 int neg = 0, val = 0;
1543 val = val * 10 + *p++ - '0';
1552 parse_arginfo(bucket *a, char *args, int argslen)
1554 char *p = args, *tmp;
1559 if (a->args != argslen)
1560 arg_number_disagree_warning(rescan_lineno, a->name);
1565 if ((a->args = argslen) == 0)
1567 a->argnames = TMALLOC(char *, argslen);
1568 NO_SPACE(a->argnames);
1569 a->argtags = TMALLOC(char *, argslen);
1570 NO_SPACE(a->argtags);
1574 for (i = 0; i < argslen; i++)
1587 if (!(p = parse_id(p + 1, &tmp)))
1596 if (a->argtags[i] != tmp)
1597 arg_type_disagree_warning(rescan_lineno, i + 1, a->name);
1600 a->argtags[i] = tmp;
1603 a->argtags[i] = NULL;
1604 if (!(p = parse_id(p, &a->argnames[i])))
1616 compile_arg(char **theptr, char *yyvaltag)
1619 struct mstring *c = msnew();
1621 Value_t *offsets = NULL, maxoffset;
1626 for (i = nitems - 1; pitem[i]; --i)
1629 if (pitem[i]->class != ARGUMENT)
1634 offsets = TMALLOC(Value_t, maxoffset + 1);
1637 for (j = 0, i++; i < nitems; i++)
1638 if (pitem[i]->class != ARGUMENT)
1639 offsets[++j] = (Value_t) (i - nitems + 1);
1640 rhs = pitem + nitems - 1;
1643 msprintf(c, "yyval.%s = ", yyvaltag);
1645 msprintf(c, "yyval = ");
1652 if (!(p = parse_id(++p, &tag)) || *p++ != '>')
1653 illegal_tag(rescan_lineno, NULL, NULL);
1654 if (isdigit(*p) || *p == '-')
1657 if (!(p = parse_int(p, &val)))
1658 dollar_error(rescan_lineno, NULL, NULL);
1661 else if (val > maxoffset)
1663 dollar_warning(rescan_lineno, val);
1664 i = val - maxoffset;
1669 if (!tag && !(tag = rhs[i]->tag) && havetags)
1670 untyped_rhs(val, rhs[i]->name);
1672 msprintf(c, "yystack.l_mark[%d]", i);
1674 msprintf(c, ".%s", tag);
1678 else if (isalpha(*p) || *p == '_')
1681 if (!(p = parse_id(p, &arg)))
1682 dollar_error(rescan_lineno, NULL, NULL);
1683 for (i = plhs[nrules]->args - 1; i >= 0; i--)
1684 if (arg == plhs[nrules]->argnames[i])
1687 unknown_arg_warning(rescan_lineno, "$", arg, NULL, NULL);
1689 tag = plhs[nrules]->argtags[i];
1690 msprintf(c, "yystack.l_mark[%d]", i - plhs[nrules]->args + 1
1693 msprintf(c, ".%s", tag);
1695 untyped_arg_warning(rescan_lineno, "$", arg);
1698 dollar_error(rescan_lineno, NULL, NULL);
1702 at_error(rescan_lineno, NULL, NULL);
1717 #define ARG_CACHE_SIZE 1024
1718 static struct arg_cache
1720 struct arg_cache *next;
1724 *arg_cache[ARG_CACHE_SIZE];
1727 lookup_arg_cache(char *code)
1729 struct arg_cache *entry;
1731 entry = arg_cache[strnshash(code) % ARG_CACHE_SIZE];
1734 if (!strnscmp(entry->code, code))
1736 entry = entry->next;
1742 insert_arg_cache(char *code, int rule)
1744 struct arg_cache *entry = NEW(struct arg_cache);
1748 i = strnshash(code) % ARG_CACHE_SIZE;
1751 entry->next = arg_cache[i];
1752 arg_cache[i] = entry;
1756 clean_arg_cache(void)
1758 struct arg_cache *e, *t;
1761 for (i = 0; i < ARG_CACHE_SIZE; i++)
1763 for (e = arg_cache[i]; (t = e); e = e->next, FREE(t))
1765 arg_cache[i] = NULL;
1771 advance_to_start(void)
1777 #if defined(YYBTYACC)
1802 syntax_error(lineno, line, s_cptr);
1807 if (!isalpha(c) && c != '_' && c != '.' && c != '_')
1808 syntax_error(lineno, line, cptr);
1812 if (bp->class == TERM)
1813 terminal_start(bp->name);
1821 rescan_lineno = lineno; /* line# for possible inherited args rescan */
1822 #if defined(YYBTYACC)
1826 args = copy_args(&argslen);
1832 syntax_error(lineno, line, cptr);
1833 start_rule(bp, s_lineno);
1834 #if defined(YYBTYACC)
1835 parse_arginfo(bp, args, argslen);
1841 start_rule(bucket *bp, int s_lineno)
1843 if (bp->class == TERM)
1844 terminal_lhs(s_lineno);
1845 bp->class = NONTERM;
1848 if (nrules >= maxrules)
1851 rprec[nrules] = UNDEFINED;
1852 rassoc[nrules] = TOKEN;
1860 if (!last_was_action && plhs[nrules]->tag)
1862 if (pitem[nitems - 1])
1864 for (i = nitems - 1; (i > 0) && pitem[i]; --i)
1866 if (pitem[i + 1] == 0 || pitem[i + 1]->tag != plhs[nrules]->tag)
1867 default_action_warning();
1871 default_action_warning();
1875 last_was_action = 0;
1876 if (nitems >= maxitems)
1884 insert_empty_rule(void)
1889 sprintf(cache, "$$%d", ++gensym);
1890 bp = make_bucket(cache);
1891 last_symbol->next = bp;
1893 bp->tag = plhs[nrules]->tag;
1895 #if defined(YYBTYACC)
1899 nitems = (Value_t) (nitems + 2);
1900 if (nitems > maxitems)
1902 bpp = pitem + nitems - 1;
1904 while ((bpp[0] = bpp[-1]) != 0)
1907 if (++nrules >= maxrules)
1909 plhs[nrules] = plhs[nrules - 1];
1910 plhs[nrules - 1] = bp;
1911 rprec[nrules] = rprec[nrules - 1];
1912 rprec[nrules - 1] = 0;
1913 rassoc[nrules] = rassoc[nrules - 1];
1914 rassoc[nrules - 1] = TOKEN;
1917 #if defined(YYBTYACC)
1919 insert_arg_rule(char *arg, char *tag)
1921 int line_number = rescan_lineno;
1922 char *code = compile_arg(&arg, tag);
1923 int rule = lookup_arg_cache(code);
1924 FILE *f = action_file;
1929 insert_arg_cache(code, rule);
1930 fprintf(f, "case %d:\n", rule - 2);
1932 fprintf(f, line_format, line_number, input_file_name);
1933 fprintf(f, "%s;\n", code);
1934 fprintf(f, "break;\n");
1935 insert_empty_rule();
1936 plhs[rule]->tag = tag;
1937 plhs[rule]->class = ARGUMENT;
1941 if (++nitems > maxitems)
1943 pitem[nitems - 1] = plhs[rule];
1955 int s_lineno = lineno;
1956 #if defined(YYBTYACC)
1962 if (c == '\'' || c == '"')
1968 rescan_lineno = lineno; /* line# for possible inherited args rescan */
1969 #if defined(YYBTYACC)
1973 args = copy_args(&argslen);
1981 start_rule(bp, s_lineno);
1982 #if defined(YYBTYACC)
1983 parse_arginfo(bp, args, argslen);
1989 if (last_was_action)
1990 insert_empty_rule();
1991 last_was_action = 0;
1993 #if defined(YYBTYACC)
1996 if (argslen == 0 && bp->args > 0 && pitem[nitems - 1] == NULL)
1999 if (plhs[nrules]->args != bp->args)
2000 wrong_number_args_warning("default ", bp->name);
2001 for (i = bp->args - 1; i >= 0; i--)
2002 if (plhs[nrules]->argtags[i] != bp->argtags[i])
2003 wrong_type_for_arg_warning(i + 1, bp->name);
2005 else if (bp->args != argslen)
2006 wrong_number_args_warning("", bp->name);
2007 if (bp->args > 0 && argslen > 0)
2011 for (ap = args, i = 0; i < argslen; i++)
2012 ap = insert_arg_rule(ap, bp->argtags[i]);
2015 #endif /* defined(YYBTYACC) */
2017 if (++nitems > maxitems)
2019 pitem[nitems - 1] = bp;
2023 after_blanks(char *s)
2025 while (*s != '\0' && isspace(UCH(*s)))
2036 #if defined(YYBTYACC)
2037 int trialaction = 0;
2041 FILE *f = action_file;
2042 int a_lineno = lineno;
2043 char *a_line = dup_line();
2044 char *a_cptr = a_line + (cptr - line);
2045 Value_t *offsets = NULL, maxoffset;
2048 if (last_was_action)
2049 insert_empty_rule();
2050 last_was_action = 1;
2052 fprintf(f, "case %d:\n", nrules - 2);
2053 #if defined(YYBTYACC)
2056 if (*cptr != L_BRAC)
2057 fprintf(f, " if (!yytrial)\n");
2063 fprintf(f, line_format, lineno, input_file_name);
2067 /* avoid putting curly-braces in first column, to ease editing */
2068 if (*after_blanks(cptr) == L_CURL)
2071 cptr = after_blanks(cptr);
2076 for (i = nitems - 1; pitem[i]; --i)
2079 if (pitem[i]->class != ARGUMENT)
2084 offsets = TMALLOC(Value_t, maxoffset + 1);
2087 for (j = 0, i++; i < nitems; i++)
2089 if (pitem[i]->class != ARGUMENT)
2091 offsets[++j] = (Value_t) (i - nitems + 1);
2094 rhs = pitem + nitems - 1;
2103 int d_lineno = lineno;
2104 char *d_line = dup_line();
2105 char *d_cptr = d_line + (cptr - line);
2112 fprintf(f, "yyval.%s", tag);
2117 else if (isdigit(c))
2121 fprintf(f, "yystack.l_mark[%d].%s", -n, tag);
2122 else if (i > maxoffset)
2124 dollar_warning(d_lineno, i);
2125 fprintf(f, "yystack.l_mark[%d].%s", i - maxoffset, tag);
2128 fprintf(f, "yystack.l_mark[%d].%s", offsets[i], tag);
2132 else if (c == '-' && isdigit(UCH(cptr[1])))
2135 i = -get_number() - n;
2136 fprintf(f, "yystack.l_mark[%d].%s", i, tag);
2140 #if defined(YYBTYACC)
2141 else if (isalpha(c) || c == '_')
2143 char *arg = scan_id();
2144 for (i = plhs[nrules]->args - 1; i >= 0; i--)
2145 if (arg == plhs[nrules]->argnames[i])
2148 unknown_arg_warning(d_lineno, "$", arg, d_line, d_cptr);
2149 fprintf(f, "yystack.l_mark[%d].%s", i - plhs[nrules]->args +
2156 dollar_error(d_lineno, d_line, d_cptr);
2158 else if (cptr[1] == '$')
2162 tag = plhs[nrules]->tag;
2165 fprintf(f, "yyval.%s", tag);
2168 fprintf(f, "yyval");
2170 #if defined(YYBTYACC)
2175 else if (isdigit(UCH(cptr[1])))
2181 if (i <= 0 || i > maxoffset)
2183 tag = rhs[offsets[i]]->tag;
2185 untyped_rhs(i, rhs[offsets[i]]->name);
2186 fprintf(f, "yystack.l_mark[%d].%s", offsets[i], tag);
2191 fprintf(f, "yystack.l_mark[%d]", -n);
2192 else if (i > maxoffset)
2194 dollar_warning(lineno, i);
2195 fprintf(f, "yystack.l_mark[%d]", i - maxoffset);
2198 fprintf(f, "yystack.l_mark[%d]", offsets[i]);
2202 else if (cptr[1] == '-')
2208 fprintf(f, "yystack.l_mark[%d]", -i - n);
2211 #if defined(YYBTYACC)
2212 else if (isalpha(cptr[1]) || cptr[1] == '_')
2217 for (i = plhs[nrules]->args - 1; i >= 0; i--)
2218 if (arg == plhs[nrules]->argnames[i])
2221 unknown_arg_warning(lineno, "$", arg, line, cptr);
2222 tag = (i < 0 ? NULL : plhs[nrules]->argtags[i]);
2223 fprintf(f, "yystack.l_mark[%d]", i - plhs[nrules]->args + 1 - n);
2225 fprintf(f, ".%s", tag);
2227 untyped_arg_warning(lineno, "$", arg);
2232 #if defined(YYBTYACC)
2237 int l_lineno = lineno;
2238 char *l_line = dup_line();
2239 char *l_cptr = l_line + (cptr - line);
2240 syntax_error(l_lineno, l_line, l_cptr);
2244 fprintf(f, "yyloc");
2248 else if (isdigit(UCH(cptr[1])))
2253 fprintf(f, "yystack.p_mark[%d]", -n);
2254 else if (i > maxoffset)
2256 at_warning(lineno, i);
2257 fprintf(f, "yystack.p_mark[%d]", i - maxoffset);
2260 fprintf(f, "yystack.p_mark[%d]", offsets[i]);
2265 if (isalpha(c) || c == '_' || c == '$')
2272 while (isalnum(c) || c == '_' || c == '$');
2276 #if defined(YYBTYACC)
2279 if (trialaction && c == L_BRAC && depth == 0)
2285 if (trialaction && c == R_BRAC && depth == 1)
2290 if (c == L_BRAC && !haveyyval)
2294 if (c == L_CURL && !haveyyval)
2296 fprintf(f, " if (!yytrial)\n");
2298 fprintf(f, line_format, lineno, input_file_name);
2302 fprintf(f, "\nbreak;\n");
2317 unterminated_action(a_lineno, a_line, a_cptr);
2322 fprintf(f, "\nbreak;\n");
2328 #if defined(YYBTYACC)
2347 #if defined(YYBTYACC)
2351 if (c == L_BRAC && !haveyyval)
2356 if (c == L_CURL && !haveyyval)
2358 fprintf(f, " if (!yytrial)\n");
2360 fprintf(f, line_format, lineno, input_file_name);
2365 fprintf(f, "\nbreak;\n");
2374 char *s = copy_string(c);
2382 char *s = copy_comment();
2393 #if defined(YYBTYACC)
2395 copy_destructor(void)
2401 struct mstring *destructor_text = msnew();
2408 msprintf(destructor_text, line_format, lineno, input_file_name);
2410 cptr = after_blanks(cptr);
2411 if (*cptr == L_CURL)
2412 /* avoid putting curly-braces in first column, to ease editing */
2413 mputc(destructor_text, '\t');
2415 syntax_error(lineno, line, cptr);
2418 a_line = dup_line();
2419 a_cptr = a_line + (cptr - line);
2428 int d_lineno = lineno;
2429 char *d_line = dup_line();
2430 char *d_cptr = d_line + (cptr - line);
2437 msprintf(destructor_text, "(*val).%s", tag);
2443 dollar_error(d_lineno, d_line, d_cptr);
2445 else if (cptr[1] == '$')
2447 /* process '$$' later; replacement is context dependent */
2448 msprintf(destructor_text, "$$");
2453 if (c == '@' && cptr[1] == '$')
2457 int l_lineno = lineno;
2458 char *l_line = dup_line();
2459 char *l_cptr = l_line + (cptr - line);
2460 syntax_error(l_lineno, l_line, l_cptr);
2462 msprintf(destructor_text, "(*loc)");
2466 if (isalpha(c) || c == '_' || c == '$')
2470 mputc(destructor_text, c);
2473 while (isalnum(c) || c == '_' || c == '$');
2477 mputc(destructor_text, c);
2484 unterminated_action(a_lineno, a_line, a_cptr);
2493 goto process_symbols;
2498 char *s = copy_string(c);
2499 msprintf(destructor_text, "%s", s);
2506 char *s = copy_comment();
2507 msprintf(destructor_text, "%s", s);
2516 code_text = msdone(destructor_text);
2525 { /* "no semantic type" default destructor */
2527 if ((bp = default_destructor[UNTYPED_DEFAULT]) == NULL)
2529 static char untyped_default[] = "<>";
2530 bp = make_bucket("untyped default");
2531 bp->tag = untyped_default;
2532 default_destructor[UNTYPED_DEFAULT] = bp;
2534 if (bp->destructor != NULL)
2535 destructor_redeclared_warning(a_lineno, a_line, a_cptr);
2537 /* replace "$$" with "(*val)" in destructor code */
2538 bp->destructor = process_destructor_XX(code_text, NULL);
2540 else if (cptr[1] == '*' && cptr[2] == '>')
2541 { /* "no per-symbol or per-type" default destructor */
2543 if ((bp = default_destructor[TYPED_DEFAULT]) == NULL)
2545 static char typed_default[] = "<*>";
2546 bp = make_bucket("typed default");
2547 bp->tag = typed_default;
2548 default_destructor[TYPED_DEFAULT] = bp;
2550 if (bp->destructor != NULL)
2551 destructor_redeclared_warning(a_lineno, a_line, a_cptr);
2554 /* postpone re-processing destructor $$s until end of grammar spec */
2555 bp->destructor = TMALLOC(char, strlen(code_text) + 1);
2556 NO_SPACE(bp->destructor);
2557 strcpy(bp->destructor, code_text);
2561 { /* "semantic type" default destructor */
2563 bp = lookup_type_destructor(tag);
2564 if (bp->destructor != NULL)
2565 destructor_redeclared_warning(a_lineno, a_line, a_cptr);
2567 /* replace "$$" with "(*val).tag" in destructor code */
2568 bp->destructor = process_destructor_XX(code_text, tag);
2571 else if (isalpha(c) || c == '_' || c == '.' || c == '$')
2572 { /* "symbol" destructor */
2574 if (bp->destructor != NULL)
2575 destructor_redeclared_warning(a_lineno, a_line, a_cptr);
2578 /* postpone re-processing destructor $$s until end of grammar spec */
2579 bp->destructor = TMALLOC(char, strlen(code_text) + 1);
2580 NO_SPACE(bp->destructor);
2581 strcpy(bp->destructor, code_text);
2592 process_destructor_XX(char *code, char *tag)
2597 struct mstring *new_code = msnew();
2598 char *codeptr = code;
2601 loop: /* step thru code */
2603 if (c == '$' && codeptr[1] == '$')
2607 msprintf(new_code, "(*val)");
2609 msprintf(new_code, "(*val).%s", tag);
2612 if (isalpha(c) || c == '_' || c == '$')
2619 while (isalnum(c) || c == '_' || c == '$');
2633 return msdone(new_code);
2661 if (c == '*' && *codeptr == '/')
2663 mputc(new_code, '/');
2675 #endif /* defined(YYBTYACC) */
2684 if (c == '%' || c == '\\')
2692 else if ((c == 'p' || c == 'P') &&
2693 ((c = cptr[2]) == 'r' || c == 'R') &&
2694 ((c = cptr[3]) == 'e' || c == 'E') &&
2695 ((c = cptr[4]) == 'c' || c == 'C') &&
2696 ((c = cptr[5], !IS_IDENT(c))))
2699 syntax_error(lineno, line, cptr);
2702 if (isalpha(c) || c == '_' || c == '.' || c == '$')
2704 else if (c == '\'' || c == '"')
2708 syntax_error(lineno, line, cptr);
2711 if (rprec[nrules] != UNDEFINED && bp->prec != rprec[nrules])
2714 rprec[nrules] = bp->prec;
2715 rassoc[nrules] = bp->assoc;
2724 initialize_grammar();
2739 #if defined(YYBTYACC)
2740 else if (c == L_CURL || c == '=' || (backtrack && c == L_BRAC))
2742 else if (c == L_CURL || c == '=')
2748 start_rule(plhs[nrules - 1], 0);
2757 syntax_error(lineno, line, cptr);
2760 #if defined(YYBTYACC)
2762 start_requires_args(goal->name);
2774 for (i = 0; i < ntags; ++i)
2776 assert(tag_table[i]);
2788 name_pool_size = 13; /* 13 == sizeof("$end") + sizeof("$accept") */
2789 for (bp = first_symbol; bp; bp = bp->next)
2790 name_pool_size += strlen(bp->name) + 1;
2792 name_pool = TMALLOC(char, name_pool_size);
2793 NO_SPACE(name_pool);
2795 strcpy(name_pool, "$accept");
2796 strcpy(name_pool + 8, "$end");
2798 for (bp = first_symbol; bp; bp = bp->next)
2802 while ((*t++ = *s++) != 0)
2814 if (goal->class == UNKNOWN)
2815 undefined_goal(goal->name);
2817 for (bp = first_symbol; bp; bp = bp->next)
2819 if (bp->class == UNKNOWN)
2821 undefined_symbol_warning(bp->name);
2828 protect_string(char *src, char **des)
2841 if ('\\' == *s || '"' == *s)
2847 *des = d = TMALLOC(char, len);
2853 if ('\\' == *s || '"' == *s)
2867 #if defined(YYBTYACC)
2868 Value_t max_tok_pval;
2873 for (bp = first_symbol; bp; bp = bp->next)
2876 if (bp->class == TERM)
2879 start_symbol = (Value_t) ntokens;
2880 nvars = (Value_t) (nsyms - ntokens);
2882 symbol_name = TMALLOC(char *, nsyms);
2883 NO_SPACE(symbol_name);
2885 symbol_value = TMALLOC(Value_t, nsyms);
2886 NO_SPACE(symbol_value);
2888 symbol_prec = TMALLOC(Value_t, nsyms);
2889 NO_SPACE(symbol_prec);
2891 symbol_assoc = TMALLOC(char, nsyms);
2892 NO_SPACE(symbol_assoc);
2894 #if defined(YYBTYACC)
2895 symbol_pval = TMALLOC(Value_t, nsyms);
2896 NO_SPACE(symbol_pval);
2900 symbol_destructor = CALLOC(sizeof(char *), nsyms);
2901 NO_SPACE(symbol_destructor);
2903 symbol_type_tag = CALLOC(sizeof(char *), nsyms);
2904 NO_SPACE(symbol_type_tag);
2908 v = TMALLOC(bucket *, nsyms);
2912 v[start_symbol] = 0;
2915 j = (Value_t) (start_symbol + 1);
2916 for (bp = first_symbol; bp; bp = bp->next)
2918 if (bp->class == TERM)
2923 assert(i == ntokens && j == nsyms);
2925 for (i = 1; i < ntokens; ++i)
2928 goal->index = (Index_t) (start_symbol + 1);
2929 k = (Value_t) (start_symbol + 2);
2939 for (i = (Value_t) (start_symbol + 1); i < nsyms; ++i)
2949 for (i = 1; i < ntokens; ++i)
2954 for (j = k++; j > 0 && symbol_value[j - 1] > n; --j)
2955 symbol_value[j] = symbol_value[j - 1];
2956 symbol_value[j] = n;
2962 if (v[1]->value == UNDEFINED)
2967 for (i = 2; i < ntokens; ++i)
2969 if (v[i]->value == UNDEFINED)
2971 while (j < k && n == symbol_value[j])
2973 while (++j < k && n == symbol_value[j])
2982 symbol_name[0] = name_pool + 8;
2983 symbol_value[0] = 0;
2985 symbol_assoc[0] = TOKEN;
2986 #if defined(YYBTYACC)
2990 for (i = 1; i < ntokens; ++i)
2992 symbol_name[i] = v[i]->name;
2993 symbol_value[i] = v[i]->value;
2994 symbol_prec[i] = v[i]->prec;
2995 symbol_assoc[i] = v[i]->assoc;
2996 #if defined(YYBTYACC)
2997 symbol_pval[i] = v[i]->value;
2998 if (symbol_pval[i] > max_tok_pval)
2999 max_tok_pval = symbol_pval[i];
3002 symbol_destructor[i] = v[i]->destructor;
3003 symbol_type_tag[i] = v[i]->tag;
3007 symbol_name[start_symbol] = name_pool;
3008 symbol_value[start_symbol] = -1;
3009 symbol_prec[start_symbol] = 0;
3010 symbol_assoc[start_symbol] = TOKEN;
3011 #if defined(YYBTYACC)
3012 symbol_pval[start_symbol] = (Value_t) (max_tok_pval + 1);
3014 for (++i; i < nsyms; ++i)
3017 symbol_name[k] = v[i]->name;
3018 symbol_value[k] = v[i]->value;
3019 symbol_prec[k] = v[i]->prec;
3020 symbol_assoc[k] = v[i]->assoc;
3021 #if defined(YYBTYACC)
3022 symbol_pval[k] = (Value_t) ((max_tok_pval + 1) + v[i]->value + 1);
3025 symbol_destructor[k] = v[i]->destructor;
3026 symbol_type_tag[k] = v[i]->tag;
3033 symbol_pname = TMALLOC(char *, nsyms);
3034 NO_SPACE(symbol_pname);
3036 for (i = 0; i < nsyms; ++i)
3037 protect_string(symbol_name[i], &(symbol_pname[i]));
3051 ritem = TMALLOC(Value_t, nitems);
3054 rlhs = TMALLOC(Value_t, nrules);
3057 rrhs = TMALLOC(Value_t, nrules + 1);
3060 rprec = TREALLOC(Value_t, rprec, nrules);
3063 rassoc = TREALLOC(Assoc_t, rassoc, nrules);
3067 ritem[1] = goal->index;
3072 rlhs[2] = start_symbol;
3078 for (i = 3; i < nrules; ++i)
3080 #if defined(YYBTYACC)
3081 if (plhs[i]->args > 0)
3083 if (plhs[i]->argnames)
3085 FREE(plhs[i]->argnames);
3086 plhs[i]->argnames = NULL;
3088 if (plhs[i]->argtags)
3090 FREE(plhs[i]->argtags);
3091 plhs[i]->argtags = NULL;
3094 #endif /* defined(YYBTYACC) */
3095 rlhs[i] = plhs[i]->index;
3101 ritem[j] = pitem[j]->index;
3102 if (pitem[j]->class == TERM)
3104 prec2 = pitem[j]->prec;
3105 assoc = pitem[j]->assoc;
3109 ritem[j] = (Value_t) - i;
3111 if (rprec[i] == UNDEFINED)
3121 #if defined(YYBTYACC)
3130 size_t j, spacing = 0;
3131 FILE *f = verbose_file;
3137 for (i = 2; i < nrules; ++i)
3139 if (rlhs[i] != rlhs[i - 1])
3143 fprintf(f, "%4d %s :", i - 2, symbol_name[rlhs[i]]);
3144 spacing = strlen(symbol_name[rlhs[i]]) + 1;
3148 fprintf(f, "%4d ", i - 2);
3155 while (ritem[k] >= 0)
3157 fprintf(f, " %s", symbol_name[ritem[k]]);
3165 #if defined(YYBTYACC)
3167 finalize_destructors(void)
3173 for (i = 2; i < nsyms; ++i)
3175 tag = symbol_type_tag[i];
3176 if (symbol_destructor[i] == NULL)
3179 { /* use <> destructor, if there is one */
3180 if ((bp = default_destructor[UNTYPED_DEFAULT]) != NULL)
3182 symbol_destructor[i] = TMALLOC(char,
3183 strlen(bp->destructor) + 1);
3184 NO_SPACE(symbol_destructor[i]);
3185 strcpy(symbol_destructor[i], bp->destructor);
3189 { /* use type destructor for this tag, if there is one */
3190 bp = lookup_type_destructor(tag);
3191 if (bp->destructor != NULL)
3193 symbol_destructor[i] = TMALLOC(char,
3194 strlen(bp->destructor) + 1);
3195 NO_SPACE(symbol_destructor[i]);
3196 strcpy(symbol_destructor[i], bp->destructor);
3199 { /* use <*> destructor, if there is one */
3200 if ((bp = default_destructor[TYPED_DEFAULT]) != NULL)
3201 /* replace "$$" with "(*val).tag" in destructor code */
3202 symbol_destructor[i]
3203 = process_destructor_XX(bp->destructor, tag);
3208 { /* replace "$$" with "(*val)[.tag]" in destructor code */
3209 symbol_destructor[i]
3210 = process_destructor_XX(symbol_destructor[i], tag);
3213 /* 'symbol_type_tag[]' elements are freed by 'free_tags()' */
3214 DO_FREE(symbol_type_tag); /* no longer needed */
3215 if ((bp = default_destructor[UNTYPED_DEFAULT]) != NULL)
3218 /* 'bp->tag' is a static value, don't free */
3219 FREE(bp->destructor);
3222 if ((bp = default_destructor[TYPED_DEFAULT]) != NULL)
3225 /* 'bp->tag' is a static value, don't free */
3226 FREE(bp->destructor);
3229 if ((bp = default_destructor[TYPE_SPECIFIED]) != NULL)
3236 /* 'bp->tag' freed by 'free_tags()' */
3237 FREE(bp->destructor);
3242 #endif /* defined(YYBTYACC) */
3247 write_section(code_file, banner);
3248 create_symbol_table();
3249 read_declarations();
3251 free_symbol_table();
3258 #if defined(YYBTYACC)
3260 finalize_destructors();
3267 free_declarations(param * list)
3271 param *next = list->next;
3284 lex_param = free_declarations(lex_param);
3285 parse_param = free_declarations(parse_param);
3295 DO_FREE(symbol_name);
3296 DO_FREE(symbol_prec);
3297 DO_FREE(symbol_assoc);
3298 DO_FREE(symbol_value);
3299 #if defined(YYBTYACC)
3300 DO_FREE(symbol_pval);
3301 DO_FREE(symbol_destructor);
3302 DO_FREE(symbol_type_tag);