/* Input parser for bison
- Copyright (C) 1984, 1986, 1989, 1992, 1998, 2000
+ Copyright 1984, 1986, 1989, 1992, 1998, 2000
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "system.h"
+#include "obstack.h"
+#include "quotearg.h"
+#include "quote.h"
#include "getargs.h"
#include "files.h"
#include "xalloc.h"
#include "output.h"
#include "reader.h"
#include "conflicts.h"
-#include "quote.h"
/* Number of slots allocated (but not necessarily used yet) in `rline' */
static int rline_allocated;
return rp->sym->type_name;
}
\f
-/*-------------------------------------------------------------------.
-| Dump the string from FINPUT to FOUTPUT. MATCH is the delimiter of |
-| the string (either ' or "). |
-`-------------------------------------------------------------------*/
+/*------------------------------------------------------------.
+| Dump the string from FIN to OOUT if non null. MATCH is the |
+| delimiter of the string (either ' or "). |
+`------------------------------------------------------------*/
static inline void
-copy_string (FILE *fin, FILE *fout, int match)
+copy_string (FILE *fin, struct obstack *oout, int match)
{
int c;
- putc (match, fout);
+ obstack_1grow (oout, match);
+
c = getc (fin);
while (c != match)
continue;
}
- putc (c, fout);
+ obstack_1grow (oout, c);
if (c == '\\')
{
c = getc (fin);
if (c == EOF)
fatal (_("unterminated string at end of file"));
- putc (c, fout);
+ obstack_1grow (oout, c);
+
if (c == '\n')
lineno++;
}
c = getc (fin);
}
- putc (c, fout);
+ obstack_1grow (oout, c);
}
-/*---------------------------------------------------------------.
-| Dump the comment from IN to OUT1 and OUT2. C is either `*' or |
-| `/', depending upon the type of comments used. OUT2 might be |
-| NULL. |
-`---------------------------------------------------------------*/
+/*-----------------------------------------------------------------.
+| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
+| NULL). In fact we just saw a `/', which might or might not be a |
+| comment. In any case, copy what we saw. |
+| |
+| OUT2 might be NULL. |
+`-----------------------------------------------------------------*/
static inline void
-copy_comment2 (FILE *in, FILE *out1, FILE *out2, int c)
+copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
{
int cplus_comment;
int ended;
+ int c;
+
+ /* We read a `/', output it. */
+ obstack_1grow (oout1, '/');
+ if (oout2)
+ obstack_1grow (oout2, '/');
+
+ switch ((c = getc (fin)))
+ {
+ case '/':
+ cplus_comment = 1;
+ break;
+ case '*':
+ cplus_comment = 0;
+ break;
+ default:
+ ungetc (c, fin);
+ return;
+ }
- cplus_comment = (c == '/');
- putc (c, out1);
- if (out2)
- putc (c, out2);
- c = getc (in);
+ obstack_1grow (oout1, c);
+ if (oout2)
+ obstack_1grow (oout2, c);
+ c = getc (fin);
ended = 0;
while (!ended)
{
while (c == '*')
{
- putc (c, out1);
- if (out2)
- putc (c, out2);
- c = getc (in);
+ obstack_1grow (oout1, c);
+ if (oout2)
+ obstack_1grow (oout2, c);
+ c = getc (fin);
}
if (c == '/')
{
- putc (c, out1);
- if (out2)
- putc (c, out2);
+ obstack_1grow (oout1, c);
+ if (oout2)
+ obstack_1grow (oout2, c);
ended = 1;
}
}
else if (c == '\n')
{
lineno++;
- putc (c, out1);
- if (out2)
- putc (c, out2);
+ obstack_1grow (oout1, c);
+ if (oout2)
+ obstack_1grow (oout2, c);
if (cplus_comment)
ended = 1;
else
- c = getc (in);
+ c = getc (fin);
}
else if (c == EOF)
fatal (_("unterminated comment"));
else
{
- putc (c, out1);
- if (out2)
- putc (c, out2);
- c = getc (in);
+ obstack_1grow (oout1, c);
+ if (oout2)
+ obstack_1grow (oout2, c);
+ c = getc (fin);
}
}
}
-/*------------------------------------------------------------.
-| Dump the comment from FIN to FOUT. C is either `*' or `/', |
-| depending upon the type of comments used. |
-`------------------------------------------------------------*/
+/*-------------------------------------------------------------------.
+| Dump the comment (actually the current string starting with a `/') |
+| from FIN to OOUT. |
+`-------------------------------------------------------------------*/
static inline void
-copy_comment (FILE *fin, FILE *fout, int c)
+copy_comment (FILE *fin, struct obstack *oout)
{
- copy_comment2 (fin, fout, NULL, c);
+ copy_comment2 (fin, oout, NULL);
}
/*-----------------------------------------------------------------.
-| FIN is pointing to a location (i.e., a `@'). Output to FOUT a |
+| FIN is pointing to a location (i.e., a `@'). Output to OOUT a |
| reference to this location. STACK_OFFSET is the number of values |
| in the current rule so far, which says where to find `$0' with |
| respect to the top of the stack. |
`-----------------------------------------------------------------*/
static inline void
-copy_at (FILE *fin, FILE *fout, int stack_offset)
+copy_at (FILE *fin, struct obstack *oout, int stack_offset)
{
int c;
c = getc (fin);
if (c == '$')
{
- fprintf (fout, "yyloc");
+ obstack_sgrow (oout, "yyloc");
locations_flag = 1;
}
else if (isdigit (c) || c == '-')
{
int n;
+ char buf[4096];
ungetc (c, fin);
n = read_signed_integer (fin);
- fprintf (fout, "yylsp[%d]", n - stack_offset);
+ obstack_fgrow1 (oout, "yylsp[%d]", n - stack_offset);
locations_flag = 1;
}
else
| |
| Possible inputs: $[<TYPENAME>]($|integer) |
| |
-| Output to FOUT a reference to this semantic value. STACK_OFFSET is |
+| Output to OOUT a reference to this semantic value. STACK_OFFSET is |
| the number of values in the current rule so far, which says where |
| to find `$0' with respect to the top of the stack. |
`-------------------------------------------------------------------*/
static inline void
-copy_dollar (FILE *fin, FILE *fout,
+copy_dollar (FILE *fin, struct obstack *oout,
symbol_list *rule, int stack_offset)
{
int c = getc (fin);
char *type_name = NULL;
- /* Get the typename if explicit. */
+ /* Get the type name if explicit. */
if (c == '<')
{
- char *cp = token_buffer;
-
- while ((c = getc (fin)) != '>' && c > 0)
- {
- if (cp == token_buffer + maxtoken)
- cp = grow_token_buffer (cp);
-
- *cp++ = c;
- }
- *cp = 0;
+ read_type_name (fin);
type_name = token_buffer;
value_components_used = 1;
-
c = getc (fin);
}
if (c == '$')
{
- fprintf (fout, "yyval");
+ obstack_sgrow (oout, "yyval");
+
if (!type_name)
type_name = get_type_name (0, rule);
if (type_name)
- fprintf (fout, ".%s", type_name);
+ obstack_fgrow1 (oout, ".%s", type_name);
if (!type_name && typed)
complain (_("$$ of `%s' has no declared type"),
rule->sym->tag);
if (!type_name && n > 0)
type_name = get_type_name (n, rule);
- fprintf (fout, "yyvsp[%d]", n - stack_offset);
+ obstack_fgrow1 (oout, "yyvsp[%d]", n - stack_offset);
+
if (type_name)
- fprintf (fout, ".%s", type_name);
+ obstack_fgrow1 (oout, ".%s", type_name);
if (!type_name && typed)
complain (_("$%d of `%s' has no declared type"),
n, rule->sym->tag);
int after_percent;
if (!no_lines_flag)
- fprintf (fattrs, "#line %d \"%s\"\n", lineno, infile);
+ obstack_fgrow2 (&attrs_obstack, "#line %d %s\n",
+ lineno, quotearg_style (c_quoting_style, infile));
after_percent = 0;
switch (c)
{
case '\n':
- putc (c, fattrs);
+ obstack_1grow (&attrs_obstack, c);
lineno++;
break;
case '\'':
case '"':
- copy_string (finput, fattrs, c);
+ copy_string (finput, &attrs_obstack, c);
break;
case '/':
- putc (c, fattrs);
- c = getc (finput);
- if (c != '*' && c != '/')
- continue;
- copy_comment (finput, fattrs, c);
+ copy_comment (finput, &attrs_obstack);
break;
case EOF:
fatal ("%s", _("unterminated `%{' definition"));
default:
- putc (c, fattrs);
+ obstack_1grow (&attrs_obstack, c);
}
c = getc (finput);
{
if (c == '}')
return;
- putc ('%', fattrs);
+ obstack_1grow (&attrs_obstack, '%');
}
after_percent = 0;
-
}
-
}
{
int token = 0;
char *typename = 0;
- struct bucket *symbol = NULL; /* pts to symbol being defined */
+ /* The symbol being defined. */
+ struct bucket *symbol = NULL;
+
+ /* After `%token' and `%nterm', any number of symbols maybe be
+ defined. */
for (;;)
{
int tmp_char = ungetc (skip_white_space (), finput);
+ /* `%' (for instance from `%token', or from `%%' etc.) is the
+ only valid means to end this declaration. */
if (tmp_char == '%')
return;
if (tmp_char == EOF)
-/*-------------------------------------------------------------------.
-| Copy the union declaration into fattrs (and fdefines), where it is |
-| made into the definition of YYSTYPE, the type of elements of the |
-| parser value stack. |
-`-------------------------------------------------------------------*/
+/*--------------------------------------------------------------.
+| Copy the union declaration into ATTRS_OBSTACK (and fdefines), |
+| where it is made into the definition of YYSTYPE, the type of |
+| elements of the parser value stack. |
+`--------------------------------------------------------------*/
static void
parse_union_decl (void)
typed = 1;
if (!no_lines_flag)
- fprintf (fattrs, "\n#line %d \"%s\"\n", lineno, infile);
+ obstack_fgrow2 (&attrs_obstack, "\n#line %d %s\n",
+ lineno, quotearg_style (c_quoting_style, infile));
else
- fprintf (fattrs, "\n");
+ obstack_1grow (&attrs_obstack, '\n');
- fprintf (fattrs, "typedef union");
- if (fdefines)
- fprintf (fdefines, "typedef union");
+ obstack_sgrow (&attrs_obstack, "typedef union");
+ if (defines_flag)
+ obstack_sgrow (&defines_obstack, "typedef union");
c = getc (finput);
while (c != EOF)
{
- putc (c, fattrs);
- if (fdefines)
- putc (c, fdefines);
+ obstack_1grow (&attrs_obstack, c);
+ if (defines_flag)
+ obstack_1grow (&defines_obstack, c);
switch (c)
{
break;
case '/':
- c = getc (finput);
- if (c != '*' && c != '/')
- continue;
- copy_comment2 (finput, fattrs, fdefines, c);
+ copy_comment2 (finput, &defines_obstack, &attrs_obstack);
break;
-
case '{':
count++;
break;
count--;
if (count <= 0)
{
- fprintf (fattrs, " YYSTYPE;\n");
- if (fdefines)
- fprintf (fdefines, " YYSTYPE;\n");
+ obstack_sgrow (&attrs_obstack, " YYSTYPE;\n");
+ if (defines_flag)
+ obstack_sgrow (&defines_obstack, " YYSTYPE;\n");
/* JF don't choke on trailing semi */
c = skip_white_space ();
if (c != ';')
static void
parse_expect_decl (void)
{
- int c;
- size_t count;
- char buffer[20];
-
- c = getc (finput);
- while (c == ' ' || c == '\t')
- c = getc (finput);
-
- count = 0;
- while (c >= '0' && c <= '9')
- {
- if (count < sizeof(buffer) - 1)
- buffer[count++] = c;
- c = getc (finput);
- }
- buffer[count] = 0;
-
+ int c = skip_white_space ();
ungetc (c, finput);
- if (count <= 0 || count > 10)
+ if (!isdigit (c))
complain (_("argument of %%expect is not an integer"));
- expected_conflicts = atoi (buffer);
+ else
+ expected_conflicts = read_signed_integer (finput);
}
/*----------------------------------------------------------------.
| Read from finput until `%%' is seen. Discard the `%%'. Handle |
| any `%' declarations, and copy the contents of any `%{ ... %}' |
-| groups to fattrs. |
+| groups to ATTRS_OBSTACK. |
`----------------------------------------------------------------*/
static void
break;
case SEMANTIC_PARSER:
- if (semantic_parser == 0)
- {
- semantic_parser = 1;
- open_extra_files ();
- }
+ semantic_parser = 1;
break;
case PURE_PARSER:
{
int c;
int count;
+ char buf[4096];
/* offset is always 0 if parser has already popped the stack pointer */
if (semantic_parser)
stack_offset = 0;
- fprintf (faction, "\ncase %d:\n", nrules);
+ sprintf (buf, "\ncase %d:\n", nrules);
+ obstack_grow (&action_obstack, buf, strlen (buf));
+
if (!no_lines_flag)
- fprintf (faction, "#line %d \"%s\"\n", lineno, infile);
- putc ('{', faction);
+ {
+ sprintf (buf, "#line %d %s\n",
+ lineno, quotearg_style (c_quoting_style, infile));
+ obstack_grow (&action_obstack, buf, strlen (buf));
+ }
+ obstack_1grow (&action_obstack, '{');
count = 1;
c = getc (finput);
switch (c)
{
case '\n':
- putc (c, faction);
+ obstack_1grow (&action_obstack, c);
lineno++;
break;
case '{':
- putc (c, faction);
+ obstack_1grow (&action_obstack, c);
count++;
break;
case '\'':
case '"':
- copy_string (finput, faction, c);
+ copy_string (finput, &action_obstack, c);
break;
case '/':
- putc (c, faction);
- c = getc (finput);
- if (c != '*' && c != '/')
- continue;
- copy_comment (finput, faction, c);
+ copy_comment (finput, &action_obstack);
break;
case '$':
- copy_dollar (finput, faction, rule, stack_offset);
+ copy_dollar (finput, &action_obstack,
+ rule, stack_offset);
break;
case '@':
- copy_at (finput, faction, stack_offset);
+ copy_at (finput, &action_obstack,
+ stack_offset);
break;
case EOF:
fatal (_("unmatched %s"), "`{'");
default:
- putc (c, faction);
+ obstack_1grow (&action_obstack, c);
}
c = getc (finput);
if (--count)
{
- putc (c, faction);
+ obstack_1grow (&action_obstack, c);
c = getc (finput);
}
}
- fprintf (faction, ";\n break;}");
+ obstack_sgrow (&action_obstack, ";\n break;}");
}
\f
/*-------------------------------------------------------------------.
if (semantic_parser)
stack_offset = 0;
- fprintf (fguard, "\ncase %d:\n", nrules);
+ obstack_fgrow1 (&guard_obstack, "\ncase %d:\n", nrules);
if (!no_lines_flag)
- fprintf (fguard, "#line %d \"%s\"\n", lineno, infile);
- putc ('{', fguard);
+ obstack_fgrow2 (&guard_obstack, "#line %d %s\n",
+ lineno, quotearg_style (c_quoting_style, infile));
+ obstack_1grow (&guard_obstack, '{');
count = 0;
c = getc (finput);
switch (c)
{
case '\n':
- putc (c, fguard);
+ obstack_1grow (&guard_obstack, c);
lineno++;
break;
case '{':
- putc (c, fguard);
+ obstack_1grow (&guard_obstack, c);
brace_flag = 1;
count++;
break;
case '}':
- putc (c, fguard);
+ obstack_1grow (&guard_obstack, c);
if (count > 0)
count--;
else
case '\'':
case '"':
- copy_string (finput, fguard, c);
+ copy_string (finput, &guard_obstack, c);
break;
case '/':
- putc (c, fguard);
- c = getc (finput);
- if (c != '*' && c != '/')
- continue;
- copy_comment (finput, fguard, c);
+ copy_comment (finput, &guard_obstack);
break;
case '$':
- copy_dollar (finput, fguard, rule, stack_offset);
+ copy_dollar (finput, &guard_obstack, rule, stack_offset);
break;
case '@':
- copy_at (finput, fguard, stack_offset);
+ copy_at (finput, &guard_obstack, stack_offset);
break;
case EOF:
fatal ("%s", _("unterminated %guard clause"));
default:
- putc (c, fguard);
+ obstack_1grow (&guard_obstack, c);
}
if (c != '}' || count != 0)
c = skip_white_space ();
- fprintf (fguard, ";\n break;}");
+ obstack_sgrow (&guard_obstack, ";\n break;}");
if (c == '{')
copy_action (rule, stack_offset);
else if (c == '=')
{
bucket *sdummy;
- /* Since the action was written out with this rule's */
- /* number, we must give the new rule this number */
- /* by inserting the new rule before it. */
+ /* Since the action was written out with this rule's
+ number, we must give the new rule this number by
+ inserting the new rule before it. */
/* Make a dummy nonterminal, a gensym. */
sdummy = gensym ();
p->next = crule1;
crule1->next = crule;
- /* insert the dummy generated by that rule into this rule. */
+ /* Insert the dummy generated by that rule into this
+ rule. */
nitems++;
p = XCALLOC (symbol_list, 1);
p->sym = sdummy;
/* 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. */
- fprintf (fattrs, "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
- if (fdefines)
- fprintf (fdefines, "#ifndef YYSTYPE\n#define YYSTYPE int\n#endif\n");
+ 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. */
`--------------------------------------------------------------*/
static void
-output_token_defines (FILE *file)
+output_token_defines (struct obstack *oout)
{
bucket *bp;
char *cp, *symbol;
if (c != '\0')
continue;
- fprintf (file, "#define\t%s\t%d\n", symbol,
- ((translations && !raw_flag)
- ? bp->user_token_number : bp->value));
+ obstack_fgrow2 (oout, "#define\t%s\t%d\n",
+ symbol,
+ ((translations && !raw_flag)
+ ? bp->user_token_number : bp->value));
if (semantic_parser)
- fprintf (file, "#define\tT%s\t%d\n", symbol, bp->value);
+ obstack_fgrow2 (oout, "#define\tT%s\t%d\n", symbol, bp->value);
}
- putc ('\n', file);
+ obstack_1grow (oout, '\n');
}
error_token_number = errtoken->value;
if (!no_parser_flag)
- output_token_defines (ftable);
+ output_token_defines (&table_obstack);
if (startval->class == unknown_sym)
fatal (_("the start symbol %s is undefined"), startval->tag);
if (defines_flag)
{
- output_token_defines (fdefines);
+ output_token_defines (&defines_obstack);
if (!pure_parser)
{
if (spec_name_prefix)
- fprintf (fdefines, "\nextern YYSTYPE %slval;\n",
- spec_name_prefix);
+ obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
+ spec_name_prefix);
else
- fprintf (fdefines, "\nextern YYSTYPE yylval;\n");
+ obstack_sgrow (&defines_obstack,
+ "\nextern YYSTYPE yylval;\n");
}
if (semantic_parser)
{
/* don't make these for dummy nonterminals made by gensym. */
if (*tags[i] != '@')
- fprintf (fdefines, "#define\tNT%s\t%d\n", tags[i], i);
+ obstack_fgrow2 (&defines_obstack,
+ "#define\tNT%s\t%d\n", tags[i], i);
}
#if 0
/* `fdefines' is now a temporary file, so we need to copy its
\f
/*-------------------------------------------------------------------.
| Read in the grammar specification and record it in the format |
-| described in gram.h. All guards are copied into the FGUARD file |
-| and all actions into FACTION, in each case forming the body of a C |
-| function (YYGUARD or YYACTION) which contains a switch statement |
-| to decide which guard or action to execute. |
+| described in gram.h. All guards are copied into the GUARD_OBSTACK |
+| and all actions into ACTION_OBSTACK, in each case forming the body |
+| of a C function (YYGUARD or YYACTION) which contains a switch |
+| statement to decide which guard or action to execute. |
`-------------------------------------------------------------------*/
void
undeftoken->class = token_sym;
undeftoken->user_token_number = 2;
- /* Read the declaration section. Copy %{ ... %} groups to FTABLE
- and FDEFINES file. Also notice any %token, %left, etc. found
- there. */
- putc ('\n', ftable);
- fprintf (ftable, "\
+ /* 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);
+\n",
+ no_parser_flag ? "Bison-generated parse tables" : "A Bison parser",
+ infile, VERSION);
- fputs ("#define YYBISON 1 /* Identify Bison output. */\n\n", ftable);
+ 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 ();
readgram ();
/* Now we know whether we need the line-number stack. If we do,
write its type into the .tab.h file. */
- if (fdefines)
- reader_output_yylsp (fdefines);
+ if (defines_flag)
+ reader_output_yylsp (&defines_obstack);
/* Write closing delimiters for actions and guards. */
output_trailers ();
if (locations_flag)
- fputs ("#define YYLSP_NEEDED\n\n", ftable);
+ obstack_sgrow (&table_obstack, "#define YYLSP_NEEDED 1\n\n");
/* Assign the symbols their symbol numbers. Write #defines for the
token symbols into FDEFINES if requested. */
packsymbols ();
}
+/*------------------------------------------------------------------.
+| 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 (FILE *f)
+reader_output_yylsp (struct obstack *oout)
{
if (locations_flag)
- fputs ("\
+ obstack_sgrow (oout, "\
\n\
#ifndef YYLTYPE\n\
typedef struct yyltype\n\
{\n\
- int timestamp;\n\
int first_line;\n\
- int first_column;\
+ int first_column;\n\
\n\
int last_line;\n\
int last_column;\n\
- char *text;\n\
} yyltype;\n\
\n\
# define YYLTYPE yyltype\n\
#endif\n\
-\n",
- f);
+\n");
}
projects / bison.git / blobdiff