-/* Output the generated parsing program for bison,
+/* Output the generated parsing program for Bison.
Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
Free Software Foundation, Inc.
02111-1307, USA. */
-/* The parser tables consist of these tables.
-
- YYTRANSLATE = vector mapping yylex's token numbers into bison's
- token numbers.
-
- YYTNAME = vector of string-names indexed by bison token number.
-
- YYTOKNUM = vector of yylex token numbers corresponding to entries
- in YYTNAME.
-
- YYRLINE = vector of line-numbers of all rules. For yydebug
- printouts.
-
- YYRHS = vector of items of all rules. This is exactly what RITEMS
- contains. For yydebug and for semantic parser.
-
- YYPRHS[R] = index in YYRHS of first item for rule R.
-
- YYR1[R] = symbol number of symbol that rule R derives.
-
- YYR2[R] = number of symbols composing right hand side of rule R.
-
- YYSTOS[S] = the symbol number of the symbol that leads to state S.
-
- YYDEFACT[S] = default rule to reduce with in state s, when YYTABLE
- doesn't specify something else to do. Zero means the default is an
- error.
-
- YYDEFGOTO[I] = default state to go to after a reduction of a rule
- that generates variable NTOKENS + I, except when YYTABLE specifies
- something else to do.
-
- YYPACT[S] = index in YYTABLE of the portion describing state S.
- The lookahead token's type is used to index that portion to find
- out what to do.
-
- If the value in YYTABLE is positive, we shift the token and go to
- that state.
-
- If the value is negative, it is minus a rule number to reduce by.
-
- If the value is zero, the default action from YYDEFACT[S] is used.
-
- YYPGOTO[I] = the index in YYTABLE of the portion describing what to
- do after reducing a rule that derives variable I + NTOKENS. This
- portion is indexed by the parser state number, S, as of before the
- text for this nonterminal was read. The value from YYTABLE is the
- state to go to if the corresponding value in YYCHECK is S.
-
- YYTABLE = a vector filled with portions for different uses, found
- via YYPACT and YYPGOTO.
-
- YYCHECK = a vector indexed in parallel with YYTABLE. It indicates,
- in a roundabout way, the bounds of the portion you are trying to
- examine.
-
- Suppose that the portion of YYTABLE starts at index P and the index
- to be examined within the portion is I. Then if YYCHECK[P+I] != I,
- I is outside the bounds of what is actually allocated, and the
- default (from YYDEFACT or YYDEFGOTO) should be used. Otherwise,
- YYTABLE[P+I] should be used.
-
- YYFINAL = the state number of the termination state. YYFLAG = most
- negative short int. Used to flag ?? */
-
#include "system.h"
#include "quotearg.h"
#include "error.h"
+#include "subpipe.h"
#include "getargs.h"
#include "files.h"
#include "gram.h"
#include "muscle_tab.h"
/* From src/scan-skel.l. */
-void m4_invoke PARAMS ((const char *definitions));
+void scan_skel (FILE *);
static struct obstack format_obstack;
GENERATE_MUSCLE_INSERT_TABLE(muscle_insert_state_number_table, state_number_t)
-/*-----------------------------------------------------------------.
-| Prepare the muscles related to the tokens: translate, tname, and |
-| toknum. |
-`-----------------------------------------------------------------*/
+/*----------------------------------------------------------------------.
+| Print to OUT a representation of FILENAME escaped both for C and M4. |
+`----------------------------------------------------------------------*/
static void
-prepare_tokens (void)
+escaped_file_name_output (FILE *out, char const *filename)
{
+ char const *p;
+ fprintf (out, "[[");
+
+ for (p = quotearg_style (c_quoting_style, filename); *p; p++)
+ switch (*p)
+ {
+ case '$': fputs ("$][", out); break;
+ case '@': fputs ("@@", out); break;
+ case '[': fputs ("@{", out); break;
+ case ']': fputs ("@}", out); break;
+ default: fputc (*p, out); break;
+ }
+
+ fprintf (out, "]]");
+}
+
+
+/*------------------------------------------------------------------.
+| Prepare the muscles related to the symbols: translate, tname, and |
+| toknum. |
+`------------------------------------------------------------------*/
+
+static void
+prepare_symbols (void)
+{
+ MUSCLE_INSERT_INT ("tokens_number", ntokens);
+ MUSCLE_INSERT_INT ("nterms_number", nvars);
+ MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
+ MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
+
muscle_insert_symbol_number_table ("translate",
token_translations,
token_translations[0],
1, max_user_token_number + 1);
+ /* tname -- token names. */
{
int i;
int j = 0;
const char *cp =
quotearg_n_style (1, c_quoting_style,
symbols[i]->tag);
- /* Width of the next token, including the two quotes, the coma
+ /* Width of the next token, including the two quotes, the comma
and the space. */
int strsize = strlen (cp) + 2;
j = 2;
}
- obstack_sgrow (&format_obstack, cp);
+ MUSCLE_OBSTACK_SGROW (&format_obstack, cp);
obstack_sgrow (&format_obstack, ", ");
j += strsize;
}
/*-------------------------------------------------------------.
| Prepare the muscles related to the rules: rhs, prhs, r1, r2, |
-| rline, dprec, merger |
+| rline, dprec, merger. |
`-------------------------------------------------------------*/
static void
/* Separator in RHS. */
rhs[i++] = -1;
/* Line where rule was defined. */
- rline[r] = rules[r].location.first_line;
- /* Dynamic precedence (GLR) */
+ rline[r] = rules[r].location.start.line;
+ /* Dynamic precedence (GLR). */
dprec[r] = rules[r].dprec;
- /* Merger-function index (GLR) */
+ /* Merger-function index (GLR). */
merger[r] = rules[r].merger;
}
- assert (i == nritems);
+ if (i != nritems)
+ abort ();
muscle_insert_item_number_table ("rhs", rhs, ritem[0], 1, nritems);
muscle_insert_unsigned_int_table ("prhs", prhs, 0, 0, nrules);
muscle_insert_short_table ("dprec", dprec, 0, 0, nrules);
muscle_insert_short_table ("merger", merger, 0, 0, nrules);
+ MUSCLE_INSERT_INT ("rules_number", nrules);
+
free (rhs);
free (prhs);
free (rline);
values[i] = states[i]->accessing_symbol;
muscle_insert_symbol_number_table ("stos", values,
0, 1, nstates);
+
+ MUSCLE_INSERT_INT ("last", high);
+ MUSCLE_INSERT_INT ("final_state_number", final_state->number);
+ MUSCLE_INSERT_INT ("states_number", nstates);
}
{
fprintf (out, " case %d:\n", r + 1);
- if (!no_lines_flag)
- fprintf (out, muscle_find ("linef"),
- rules[r].action_location.first_line,
- quotearg_style (c_quoting_style,
- muscle_find ("filename")));
+ fprintf (out, "]b4_syncline([[%d]], ",
+ rules[r].action_location.start.line);
+ escaped_file_name_output (out, rules[r].action_location.start.file);
+ fprintf (out, ")[\n");
fprintf (out, " %s\n break;\n\n",
rules[r].action);
}
/* At this stage, if there are literal aliases, they are part of
SYMBOLS, so we should not find symbols which are the aliases
here. */
- assert (number != USER_NUMBER_ALIAS);
+ if (number == USER_NUMBER_ALIAS)
+ abort ();
/* Skip error token. */
if (symbol == errtoken)
/* Filename, lineno,
Symbol-name, Symbol-number,
destructor, typename. */
- fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
- first ? "" : ",\n",
- infile, symbol->destructor_location.first_line,
+ fprintf (out, "%s[",
+ first ? "" : ",\n");
+ escaped_file_name_output (out, symbol->destructor_location.start.file);
+ fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+ symbol->destructor_location.start.line,
symbol->tag,
symbol->number,
symbol->destructor,
/* Filename, lineno,
Symbol-name, Symbol-number,
printer, typename. */
- fprintf (out, "%s[[[%s]], [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
- first ? "" : ",\n",
- infile, symbol->printer_location.first_line,
+ fprintf (out, "%s[",
+ first ? "" : ",\n");
+ escaped_file_name_output (out, symbol->printer_location.start.file);
+ fprintf (out, ", [[%d]], [[%s]], [[%d]], [[%s]], [[%s]]]",
+ symbol->printer_location.start.line,
symbol->tag,
symbol->number,
symbol->printer,
that case. Nevertheless, it seems even better to be able to use
the GLR skeletons even without the non-deterministic tables. */
muscle_insert_unsigned_int_table ("conflict_list_heads", conflict_table,
- conflict_table[0], 1, high+1);
+ conflict_table[0], 1, high + 1);
muscle_insert_unsigned_int_table ("conflicting_rules", conflict_list,
conflict_list[0], 1, conflict_list_cnt);
}
static void
output_skeleton (void)
{
- /* Store the definition of all the muscles. */
- const char *tempdir = getenv ("TMPDIR");
- char *tempfile = NULL;
- FILE *out = NULL;
- int fd;
-
- if (tempdir == NULL)
- tempdir = DEFAULT_TMPDIR;
- tempfile = xmalloc (strlen (tempdir) + 11);
- sprintf (tempfile, "%s/bsnXXXXXX", tempdir);
- fd = mkstemp (tempfile);
- if (fd == -1)
- error (EXIT_FAILURE, errno, "%s", tempfile);
-
- out = fdopen (fd, "w");
- if (out == NULL)
- error (EXIT_FAILURE, errno, "%s", tempfile);
-
- /* There are no comments, especially not `#': we do want M4 expansion
- after `#': think of CPP macros! */
- fputs ("m4_changecom()\n", out);
+ FILE *in;
+ FILE *out;
+ int filter_fd[2];
+ char const *argv[7];
+ pid_t pid;
+
+ /* Compute the names of the package data dir and skeleton file.
+ Test whether m4sugar.m4 is readable, to check for proper
+ installation. A faulty installation can cause deadlock, so a
+ cheap sanity check is worthwhile. */
+ char const m4sugar[] = "m4sugar/m4sugar.m4";
+ char *full_path;
+ char const *p;
+ char const *m4 = (p = getenv ("M4")) ? p : M4;
+ char const *pkgdatadir = (p = getenv ("BISON_PKGDATADIR")) ? p : PKGDATADIR;
+ size_t skeleton_size = strlen (skeleton) + 1;
+ size_t pkgdatadirlen = strlen (pkgdatadir);
+ while (pkgdatadirlen && pkgdatadir[pkgdatadirlen - 1] == '/')
+ pkgdatadirlen--;
+ full_path = xmalloc (pkgdatadirlen + 1
+ + (skeleton_size < sizeof m4sugar
+ ? sizeof m4sugar : skeleton_size));
+ strcpy (full_path, pkgdatadir);
+ full_path[pkgdatadirlen] = '/';
+ strcpy (full_path + pkgdatadirlen + 1, m4sugar);
+ xfclose (xfopen (full_path, "r"));
+ strcpy (full_path + pkgdatadirlen + 1, skeleton);
+
+ /* Create an m4 subprocess connected to us via two pipes. */
+
+ if (trace_flag & trace_tools)
+ fprintf (stderr, "running: %s -I %s %s - %s\n",
+ m4, pkgdatadir, m4sugar, full_path);
+
+ argv[0] = m4;
+ argv[1] = "-I";
+ argv[2] = pkgdatadir;
+ argv[3] = m4sugar;
+ argv[4] = "-";
+ argv[5] = full_path;
+ argv[6] = NULL;
+
+ init_subpipe ();
+ pid = create_subpipe (argv, filter_fd);
+ free (full_path);
+
+ out = fdopen (filter_fd[0], "w");
+ if (! out)
+ error (EXIT_FAILURE, errno, "fdopen");
+
+ /* Output the definitions of all the muscles. */
fputs ("m4_init()\n", out);
user_actions_output (out);
fputs ("m4_divert_push(0)dnl\n", out);
xfclose (out);
+ /* Read and process m4's output. */
timevar_push (TV_M4);
- m4_invoke (tempfile);
+ in = fdopen (filter_fd[1], "r");
+ if (! in)
+ error (EXIT_FAILURE, errno, "fdopen");
+ scan_skel (in);
+ xfclose (in);
+ reap_subpipe (pid, m4);
timevar_pop (TV_M4);
-
- /* If `debugging', keep this file alive. */
- if (!(trace_flag & trace_tools))
- unlink (tempfile);
-
- free (tempfile);
}
static void
prepare (void)
{
/* Flags. */
- MUSCLE_INSERT_INT ("locations_flag", locations_flag);
+ MUSCLE_INSERT_INT ("debug", debug_flag);
MUSCLE_INSERT_INT ("defines_flag", defines_flag);
MUSCLE_INSERT_INT ("error_verbose", error_verbose);
+ MUSCLE_INSERT_INT ("locations_flag", locations_flag);
MUSCLE_INSERT_INT ("pure", pure_parser);
- MUSCLE_INSERT_INT ("debug", debug_flag);
+ MUSCLE_INSERT_INT ("synclines_flag", !no_lines_flag);
- /* FIXME: This is wrong: the muscles should decide whether they hold
- a copy or not, but the situation is too obscure currently. */
+ /* File names. */
MUSCLE_INSERT_STRING ("prefix", spec_name_prefix ? spec_name_prefix : "yy");
- MUSCLE_INSERT_STRING ("output_infix", output_infix ? output_infix : "");
- MUSCLE_INSERT_STRING ("output_prefix", short_base_name);
- MUSCLE_INSERT_STRING ("output_parser_name", parser_file_name);
- MUSCLE_INSERT_STRING ("output_header_name", spec_defines_file);
-
- /* Symbols. */
- MUSCLE_INSERT_INT ("tokens_number", ntokens);
- MUSCLE_INSERT_INT ("nterms_number", nvars);
- MUSCLE_INSERT_INT ("undef_token_number", undeftoken->number);
- MUSCLE_INSERT_INT ("user_token_number_max", max_user_token_number);
-
- /* Rules. */
- MUSCLE_INSERT_INT ("rules_number", nrules);
-
- /* States. */
- MUSCLE_INSERT_INT ("last", high);
- MUSCLE_INSERT_INT ("final_state_number", final_state->number);
- MUSCLE_INSERT_INT ("states_number", nstates);
/* User Code. */
obstack_1grow (&pre_prologue_obstack, 0);
}
/* Parse the skeleton file and output the needed parsers. */
- muscle_insert ("skeleton", xstrdup (skeleton));
+ MUSCLE_INSERT_C_STRING ("skeleton", skeleton);
}
{
obstack_init (&format_obstack);
- prepare_tokens ();
+ prepare_symbols ();
prepare_rules ();
prepare_states ();
prepare_actions ();
projects / bison.git / blobdiff