#include "output.h"
#include "reader.h"
#include "conflicts.h"
+#include "macrotab.h"
/* Number of slots allocated (but not necessarily used yet) in `rline' */
static int rline_allocated;
/* Incremented for each %left, %right or %nonassoc seen */
static int lastprec;
-/* Incremented for each generated symbol */
-static int gensym_count;
-
static bucket *errtoken;
static bucket *undeftoken;
\f
`------------------------------------------------------------*/
static inline void
-copy_string (FILE *fin, struct obstack *oout, int match)
+copy_string2 (FILE *fin, struct obstack *oout, int match, int store)
{
int c;
- obstack_1grow (oout, match);
+ if (store)
+ obstack_1grow (oout, match);
c = getc (fin);
c = getc (fin);
}
- obstack_1grow (oout, c);
+ if (store)
+ obstack_1grow (oout, c);
+}
+
+/* FIXME. */
+
+static inline void
+copy_string (FILE *fin, struct obstack *oout, int match)
+{
+ copy_string2 (fin, oout, match, 1);
}
+/* FIXME. */
+
+static inline void
+copy_identifier (FILE *fin, struct obstack *oout)
+{
+ int c;
+
+ while (isalnum (c = getc (fin)) || c == '_')
+ obstack_1grow (oout, c);
+
+ ungetc (c, fin);
+}
/*-----------------------------------------------------------------.
| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
else if (isdigit (c) || c == '-')
{
int n;
- char buf[4096];
ungetc (c, fin);
n = read_signed_integer (fin);
symbol_list *rule, int stack_offset)
{
int c = getc (fin);
- char *type_name = NULL;
+ const char *type_name = NULL;
/* Get the type name if explicit. */
if (c == '<')
/* -1 while reading a character if prev char was %. */
int after_percent;
+#if 0
if (!no_lines_flag)
obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
lineno, quotearg_style (c_quoting_style, infile));
+#endif
after_percent = 0;
static void
parse_token_decl (symbol_class what_is, symbol_class what_is_not)
{
- int token = 0;
+ token_t token = 0;
char *typename = 0;
/* The symbol being defined. */
fatal (_("Premature EOF after %s"), token_buffer);
token = lex ();
- if (token == COMMA)
+ if (token == tok_comma)
{
symbol = NULL;
continue;
}
- if (token == TYPENAME)
+ if (token == tok_typename)
{
typename = xstrdup (token_buffer);
value_components_used = 1;
symbol = NULL;
}
- else if (token == IDENTIFIER && *symval->tag == '\"' && symbol)
+ else if (token == tok_identifier && *symval->tag == '\"' && symbol)
{
if (symval->alias)
warn (_("symbol `%s' used more than once as a literal string"),
translations = 1;
symbol = NULL;
}
- else if (token == IDENTIFIER)
+ else if (token == tok_identifier)
{
int oldclass = symval->class;
symbol = symval;
complain (_("type redeclaration for %s"), symbol->tag);
}
}
- else if (symbol && token == NUMBER)
+ else if (symbol && token == tok_number)
{
symbol->user_token_number = numval;
translations = 1;
{
if (start_flag)
complain (_("multiple %s declarations"), "%start");
- if (lex () != IDENTIFIER)
+ if (lex () != tok_identifier)
complain (_("invalid %s declaration"), "%start");
else
{
{
char *name;
- if (lex () != TYPENAME)
+ if (lex () != tok_typename)
{
complain ("%s", _("%type declaration has no <typename>"));
skip_to_char ('%');
for (;;)
{
- int t;
+ token_t t;
int tmp_char = ungetc (skip_white_space (), finput);
if (tmp_char == '%')
switch (t)
{
- case COMMA:
- case SEMICOLON:
+ case tok_comma:
+ case tok_semicolon:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->type_name == NULL)
symval->type_name = name;
else if (strcmp (name, symval->type_name) != 0)
for (;;)
{
- int t;
+ token_t t;
int tmp_char = ungetc (skip_white_space (), finput);
if (tmp_char == '%')
switch (t)
{
- case TYPENAME:
+ case tok_typename:
name = xstrdup (token_buffer);
break;
- case COMMA:
+ case tok_comma:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->prec != 0)
complain (_("redefining precedence of %s"), symval->tag);
symval->prec = lastprec;
}
break;
- case NUMBER:
- if (prev == IDENTIFIER)
+ case tok_number:
+ if (prev == tok_identifier)
{
symval->user_token_number = numval;
translations = 1;
}
break;
- case SEMICOLON:
+ case tok_semicolon:
return;
default:
static void
parse_thong_decl (void)
{
- int token;
+ token_t token;
struct bucket *symbol;
char *typename = 0;
int usrtoknum;
translations = 1;
token = lex (); /* fetch typename or first token */
- if (token == TYPENAME)
+ if (token == tok_typename)
{
typename = xstrdup (token_buffer);
value_components_used = 1;
/* process first token */
- if (token != IDENTIFIER)
+ if (token != tok_identifier)
{
complain (_("unrecognized item %s, expected an identifier"),
token_buffer);
token = lex (); /* get number or literal string */
- if (token == NUMBER)
+ if (token == tok_number)
{
usrtoknum = numval;
token = lex (); /* okay, did number, now get literal */
/* process literal string token */
- if (token != IDENTIFIER || *symval->tag != '\"')
+ if (token != tok_identifier || *symval->tag != '\"')
{
complain (_("expected string constant instead of %s"), token_buffer);
skip_to_char ('%');
nsyms--;
}
+/* FIXME. */
+
+static void
+parse_macro_decl (void)
+{
+ int ch = ungetc (skip_white_space (), finput);
+ char* macro_key;
+ char* macro_value;
+
+ /* Read key. */
+ if (!isalpha (ch) && ch != '_')
+ {
+ complain (_("invalid %s declaration"), "%define");
+ skip_to_char ('%');
+ return;
+ }
+ copy_identifier (finput, ¯o_obstack);
+ obstack_1grow (¯o_obstack, 0);
+ macro_key = obstack_finish (¯o_obstack);
+
+ /* Read value. */
+ ch = skip_white_space ();
+ if (ch != '"')
+ {
+ ungetc (ch, finput);
+ if (ch != EOF)
+ {
+ complain (_("invalid %s declaration"), "%define");
+ skip_to_char ('%');
+ return;
+ }
+ else
+ fatal (_("Premature EOF after %s"), "\"");
+ }
+ copy_string2 (finput, ¯o_obstack, '"', 0);
+ obstack_1grow (¯o_obstack, 0);
+ macro_value = obstack_finish (¯o_obstack);
+
+ /* Store the (key, value) pair in the environment. */
+ macro_insert (macro_key, macro_value);
+}
+
+
+/*----------------------------------.
+| Parse what comes after %skeleton. |
+`----------------------------------*/
+
+void
+parse_skel_decl (void)
+{
+ /* Complete with parse_dquoted_param () on the CVS branch 1.29. */
+}
+
+/*------------------------------------------.
+| Parse what comes after %header_extension. |
+`------------------------------------------*/
+
+static void
+parse_header_extension_decl (void)
+{
+ char buff[32];
+
+ if (header_extension)
+ complain (_("multiple %%header_extension declarations"));
+ fscanf (finput, "%s", buff);
+ header_extension = xstrdup (buff);
+}
+
+/*------------------------------------------.
+| Parse what comes after %source_extension. |
+`------------------------------------------*/
+
+static void
+parse_source_extension_decl (void)
+{
+ char buff[32];
+
+ if (src_extension)
+ complain (_("multiple %%source_extension declarations"));
+ fscanf (finput, "%s", buff);
+ src_extension = xstrdup (buff);
+}
/*----------------------------------------------------------------.
| Read from finput until `%%' is seen. Discard the `%%'. Handle |
switch (tok)
{
- case TWO_PERCENTS:
+ case tok_two_percents:
return;
- case PERCENT_LEFT_CURLY:
+ case tok_percent_left_curly:
copy_definition ();
break;
- case TOKEN:
+ case tok_token:
parse_token_decl (token_sym, nterm_sym);
break;
- case NTERM:
+ case tok_nterm:
parse_token_decl (nterm_sym, token_sym);
break;
- case TYPE:
+ case tok_type:
parse_type_decl ();
break;
- case START:
+ case tok_start:
parse_start_decl ();
break;
- case UNION:
+ case tok_union:
parse_union_decl ();
break;
- case EXPECT:
+ case tok_expect:
parse_expect_decl ();
break;
- case THONG:
+ case tok_thong:
parse_thong_decl ();
break;
- case LEFT:
+ case tok_left:
parse_assoc_decl (left_assoc);
break;
- case RIGHT:
+ case tok_right:
parse_assoc_decl (right_assoc);
break;
- case NONASSOC:
+ case tok_nonassoc:
parse_assoc_decl (non_assoc);
break;
- case NOOP:
+ case tok_hdrext:
+ parse_header_extension_decl ();
+ break;
+
+ case tok_srcext:
+ parse_source_extension_decl ();
+ break;
+
+ case tok_define:
+ parse_macro_decl ();
+ break;
+
+ case tok_skel:
+ parse_skel_decl ();
+ break;
+
+ case tok_noop:
break;
default:
static bucket *
gensym (void)
{
+ /* Incremented for each generated symbol */
+ static int gensym_count = 0;
+ static char buf[256];
+
bucket *sym;
- sprintf (token_buffer, "@%d", ++gensym_count);
+ sprintf (buf, "@%d", ++gensym_count);
+ token_buffer = buf;
sym = getsym (token_buffer);
sym->class = nterm_sym;
sym->value = nvars++;
get_type (void)
{
int k;
- int t;
+ token_t token;
char *name;
- t = lex ();
+ token = lex ();
- if (t != TYPENAME)
+ if (token != tok_typename)
{
complain (_("invalid %s declaration"), "%type");
return t;
for (;;)
{
- t = lex ();
+ token = lex ();
- switch (t)
+ switch (token)
{
- case SEMICOLON:
+ case tok_semicolon:
return lex ();
- case COMMA:
+ case tok_comma:
break;
- case IDENTIFIER:
+ case tok_identifier:
if (symval->type_name == NULL)
symval->type_name = name;
else if (strcmp (name, symval->type_name) != 0)
break;
default:
- return t;
+ return token;
}
}
}
static void
readgram (void)
{
- int t;
+ token_t t;
bucket *lhs = NULL;
symbol_list *p;
symbol_list *p1;
t = lex ();
- while (t != TWO_PERCENTS && t != ENDFILE)
+ while (t != tok_two_percents && t != tok_eof)
{
- if (t == IDENTIFIER || t == BAR)
+ if (t == tok_identifier || t == tok_bar)
{
int action_flag = 0;
/* Number of symbols in rhs of this rule so far */
int xactions = 0; /* JF for error checking */
bucket *first_rhs = 0;
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
lhs = symval;
}
t = lex ();
- if (t != COLON)
+ if (t != tok_colon)
{
complain (_("ill-formed rule: initial symbol not followed by colon"));
unlex (t);
}
}
- if (nrules == 0 && t == BAR)
+ if (nrules == 0 && t == tok_bar)
{
complain (_("grammar starts with vertical bar"));
lhs = symval; /* BOGUS: use a random symval */
for (;;)
{
t = lex ();
- if (t == PREC)
+ if (t == tok_prec)
{
t = lex ();
crule->ruleprec = symval;
t = lex ();
}
- if (!(t == IDENTIFIER || t == LEFT_CURLY))
+ if (!(t == tok_identifier || t == tok_left_curly))
break;
/* If next token is an identifier, see if a colon follows it.
If one does, exit this rule now. */
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
bucket *ssave;
- int t1;
+ token_t t1;
ssave = symval;
t1 = lex ();
unlex (t1);
symval = ssave;
- if (t1 == COLON)
+ if (t1 == tok_colon)
break;
if (!first_rhs) /* JF */
action_flag = 0;
}
- if (t == IDENTIFIER)
+ if (t == tok_identifier)
{
nitems++;
p = XCALLOC (symbol_list, 1);
p1->next = p;
p1 = p;
- if (t == PREC)
+ if (t == tok_prec)
{
complain (_("two @prec's in a row"));
t = lex ();
crule->ruleprec = symval;
t = lex ();
}
- if (t == GUARD)
+ if (t == tok_guard)
{
if (!semantic_parser)
complain (_("%%guard present but %%semantic_parser not specified"));
copy_guard (crule, rulelength);
t = lex ();
}
- else if (t == LEFT_CURLY)
+ else if (t == tok_left_curly)
{
/* This case never occurs -wjh */
if (action_flag)
/* Warn if there is no default for $$ but we need one. */
else if (!xactions && !first_rhs && lhs->type_name != 0)
complain (_("empty rule for typed nonterminal, and no action"));
- if (t == SEMICOLON)
+ if (t == tok_semicolon)
t = lex ();
}
#if 0
b) most of them scan forward until finding a next %
thus they may swallow lots of intervening rules
*/
- else if (t == TOKEN)
+ else if (t == tok_token)
{
parse_token_decl (token_sym, nterm_sym);
t = lex ();
}
- else if (t == NTERM)
+ else if (t == tok_nterm)
{
parse_token_decl (nterm_sym, token_sym);
t = lex ();
}
- else if (t == TYPE)
+ else if (t == tok_type)
{
t = get_type ();
}
- else if (t == UNION)
+ else if (t == tok_union)
{
parse_union_decl ();
t = lex ();
}
- else if (t == EXPECT)
+ else if (t == tok_expect)
{
parse_expect_decl ();
t = lex ();
}
- else if (t == START)
+ else if (t == tok_start)
{
parse_start_decl ();
t = lex ();
else
{
- complain (_("invalid input: %s"), token_buffer);
+ complain (_("invalid input: %s"), quote (token_buffer));
t = lex ();
}
}
if (nrules == 0)
fatal (_("no rules in the input grammar"));
- /* JF put out same default YYSTYPE as YACC does */
- if (typed == 0
- && !value_components_used)
- {
- /* We used to use `unsigned long' as YYSTYPE on MSDOS,
- but it seems better to be consistent.
- Most programs should declare their own type anyway. */
- obstack_sgrow (&attrs_obstack,
- "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
- if (defines_flag)
- obstack_sgrow (&defines_obstack, "\
-#ifndef YYSTYPE\n\
-# define YYSTYPE int\n\
-#endif\n");
- }
-
/* Report any undefined symbols and consider them nonterminals. */
for (bp = firstsymbol; bp; bp = bp->next)
ntokens = nsyms - nvars;
}
+
+/* At the end of the grammar file, some C source code must
+ be stored. It is going to be associated to the epilogue
+ directive. */
+static void
+read_additionnal_code (void)
+{
+ char c;
+ struct obstack el_obstack;
+
+ obstack_init (&el_obstack);
+
+ while ((c = getc (finput)) != EOF)
+ obstack_1grow (&el_obstack, c);
+
+ obstack_1grow (&el_obstack, 0);
+ macro_insert ("epilogue", obstack_finish (&el_obstack));
+}
+
\f
/*--------------------------------------------------------------.
| For named tokens, but not literal ones, define the name. The |
if (c != '\0')
continue;
- obstack_fgrow2 (oout, "#define\t%s\t%d\n",
+ obstack_fgrow2 (oout, "# define\t%s\t%d\n",
symbol,
- ((translations && !raw_flag)
- ? bp->user_token_number : bp->value));
+ (translations ? bp->user_token_number : bp->value));
if (semantic_parser)
- obstack_fgrow2 (oout, "#define\tT%s\t%d\n", symbol, bp->value);
+ obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);
}
-
- obstack_1grow (oout, '\n');
}
int last_user_token_number;
static char DOLLAR[] = "$";
- /* int lossage = 0; JF set but not used */
-
tags = XCALLOC (char *, nsyms + 1);
tags[0] = DOLLAR;
user_toknums = XCALLOC (short, nsyms + 1);
error_token_number = errtoken->value;
+ output_token_defines (&output_obstack);
+ obstack_1grow (&output_obstack, 0);
+ macro_insert ("tokendef", obstack_finish (&output_obstack));
+
+#if 0
if (!no_parser_flag)
output_token_defines (&table_obstack);
+#endif
if (startval->class == unknown_sym)
fatal (_("the start symbol %s is undefined"), startval->tag);
/* don't make these for dummy nonterminals made by gensym. */
if (*tags[i] != '@')
obstack_fgrow2 (&defines_obstack,
- "#define\tNT%s\t%d\n", tags[i], i);
+ "# define\tNT%s\t%d\n", tags[i], i);
}
#if 0
/* `fdefines' is now a temporary file, so we need to copy its
typed = 0;
lastprec = 0;
- gensym_count = 0;
-
semantic_parser = 0;
pure_parser = 0;
init_lex ();
lineno = 1;
+ /* Initialize the macro obstack. */
+ obstack_init (¯o_obstack);
+
/* Initialize the symbol table. */
tabinit ();
+
/* Construct the error token */
errtoken = getsym ("error");
errtoken->class = token_sym;
errtoken->user_token_number = 256; /* Value specified by POSIX. */
+
/* Construct a token that represents all undefined literal tokens.
It is always token number 2. */
undeftoken = getsym ("$undefined.");
/* Read the declaration section. Copy %{ ... %} groups to
TABLE_OBSTACK and FDEFINES file. Also notice any %token, %left,
etc. found there. */
- obstack_1grow (&table_obstack, '\n');
- obstack_fgrow3 (&table_obstack, "\
-/* %s, made from %s\n\
- by GNU bison %s. */\n\
-\n",
- no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
- infile, VERSION);
-
- obstack_sgrow (&table_obstack,
- "#define YYBISON 1 /* Identify Bison output. */\n\n");
read_declarations ();
- /* Start writing the guard and action files, if they are needed. */
- output_headers ();
/* Read in the grammar, build grammar in list form. Write out
guards and actions. */
readgram ();
+ /* Some C code is given at the end of the grammar file. */
+ read_additionnal_code ();
/* Now we know whether we need the line-number stack. If we do,
write its type into the .tab.h file. */
+#if 0
if (defines_flag)
reader_output_yylsp (&defines_obstack);
- /* Write closing delimiters for actions and guards. */
- output_trailers ();
- if (locations_flag)
- obstack_sgrow (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
+#endif
/* Assign the symbols their symbol numbers. Write #defines for the
token symbols into FDEFINES if requested. */
packsymbols ();
referred to by symbol number. */
free_symtab ();
}
-
-
-/*------------------------------------------------------------------.
-| Define YYLTYPE. Cannot be in the skeleton since we might have to |
-| output it in the headers if --defines is used. |
-`------------------------------------------------------------------*/
-
-void
-reader_output_yylsp (struct obstack *oout)
-{
- if (locations_flag)
- obstack_sgrow (oout, "\
-\n\
-#ifndef YYLTYPE\n\
-typedef struct yyltype\n\
-{\n\
- int first_line;\n\
- int first_column;\n\
-\n\
- int last_line;\n\
- int last_column;\n\
-} yyltype;\n\
-\n\
-# define YYLTYPE yyltype\n\
-#endif\n\
-\n");
-}
projects / bison.git / blobdiff