/* Scan Bison Skeletons. -*- C -*-
- Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
-%option nodefault noyywrap nounput never-interactive
+%option nodefault noyywrap nounput never-interactive debug
%option prefix="skel_" outfile="lex.yy.c"
%{
-#include "system.h"
-#include "error.h"
+/* Work around a bug in flex 2.5.31. See Debian bug 333231
+ <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
+#undef skel_wrap
+#define skel_wrap() 1
+
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include "flex-scanner.h"
+
+#include <dirname.h>
+#include <error.h>
+#include <quotearg.h>
+
+#include "complain.h"
#include "getargs.h"
#include "files.h"
-int skel_lex PARAMS ((void));
-static int yylineno = 1;
-static char *yyoutname = NULL;
+#include "scan-skel.h"
+
+#define YY_DECL static int skel_lex (void)
+YY_DECL;
+
+#define QPUTS(String) \
+ fputs (quotearg_style (c_quoting_style, String), yyout)
+
+static void at_directive_perform (char **outnamep, int *out_linenop);
+static void fail_for_at_directive_too_many_args (void);
+static void fail_for_at_directive_too_few_args (void);
+static void fail_for_invalid_at (char const *at);
+
+/* In SC_AT_DIRECTIVE_ARG context, the name of the directive. */
+static char *at_directive_name;
+
+/* Currently, only the @warn, @complain, @fatal, @warn_at, @complain_at, and
+ @fatal_at directives take multiple arguments, and the last three already
+ can't take more than 7. */
+#define AT_DIRECTIVE_ARGC_MAX 7
+static int at_directive_argc = 0;
+static char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
%}
+
+%x SC_AT_DIRECTIVE_ARG
+%x SC_AT_DIRECTIVE_SKIP_WS
+
%%
- /* This is an approximation, but we don't need more. */
-^"#output \""[^\"]+\"\n {
- yytext[yyleng - 2] = '\0';
- XFREE (yyoutname);
- yyoutname = xstrdup (yytext + strlen ("#output \""));
- yyout = xfopen (yyoutname, "w");
- yylineno = 1;
- }
-
-"@<:@" fputc ('[', yyout);
-"@:>@" fputc (']', yyout);
-
-"__oline__" fprintf (yyout, "%d", yylineno+1);
-"__ofile__" fprintf (yyout, "%s", yyoutname);
-[^@_\n]+ ECHO;
-\n+ yylineno += yyleng; ECHO;
-. ECHO;
-
-<<EOF>> xfclose (yyout); free (yyoutname); return EOF;
-%%
-/* From lib/readpipe.c. */
-FILE *readpipe PARAMS ((const char *, ...));
+%{
+ int out_lineno IF_LINT (= 0);
+ char *outname = NULL;
+%}
+
+"@@" fputc ('@', yyout);
+"@{" fputc ('[', yyout);
+"@}" fputc (']', yyout);
+
+"@oline@" fprintf (yyout, "%d", out_lineno + 1);
+"@ofile@" QPUTS (outname);
+"@dir_prefix@" QPUTS (dir_prefix);
+
+@[a-z_]+"(" {
+ yytext[yyleng-1] = '\0';
+ at_directive_name = xstrdup (yytext);
+ BEGIN SC_AT_DIRECTIVE_ARG;
+}
+
+ /* This pattern must not match more than the previous @ patterns. */
+@[^@{}(\n]* fail_for_invalid_at (yytext);
+\n out_lineno++; ECHO;
+[^@\n]+ ECHO;
+
+<INITIAL><<EOF>> {
+ if (outname)
+ {
+ free (outname);
+ xfclose (yyout);
+ }
+ return EOF;
+}
+
+<SC_AT_DIRECTIVE_ARG>{
+ [^@]+ { STRING_GROW; }
+
+ "@@" { obstack_1grow (&obstack_for_string, '@'); }
+ "@{" { obstack_1grow (&obstack_for_string, '['); }
+ "@}" { obstack_1grow (&obstack_for_string, ']'); }
+ "@`" /* Emtpy. Useful for starting an argument
+ that begins with whitespace. */
+
+ @[,)] {
+ if (at_directive_argc >= AT_DIRECTIVE_ARGC_MAX)
+ fail_for_at_directive_too_many_args ();
+
+ obstack_1grow (&obstack_for_string, '\0');
+ at_directive_argv[at_directive_argc++] =
+ obstack_finish (&obstack_for_string);
+
+ /* Like M4, skip whitespace after a comma. */
+ if (yytext[1] == ',')
+ BEGIN SC_AT_DIRECTIVE_SKIP_WS;
+ else
+ {
+ at_directive_perform (&outname, &out_lineno);
+ obstack_free (&obstack_for_string, at_directive_argv[0]);
+ at_directive_argc = 0;
+ free (at_directive_name);
+ BEGIN INITIAL;
+ }
+ }
-/*----------------------.
-| Run our backend, M4. |
-`----------------------*/
+ @.? { fail_for_invalid_at (yytext); }
+}
+
+<SC_AT_DIRECTIVE_SKIP_WS>{
+ [ \t\r\n]
+ . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARG; }
+}
+
+<SC_AT_DIRECTIVE_ARG,SC_AT_DIRECTIVE_SKIP_WS>{
+ <<EOF>> {
+ fatal (_("unclosed %s directive in skeleton"), at_directive_name);
+ }
+}
+
+%%
-void m4_invoke PARAMS ((const char *definitions));
+/*------------------------.
+| Scan a Bison skeleton. |
+`------------------------*/
void
-m4_invoke (const char *definitions)
+scan_skel (FILE *in)
{
- /* Invoke m4 on the definition of the muscles, and the skeleton. */
- const char *bison_pkgdatadir = getenv ("BISON_PKGDATADIR");
- const char *m4 = getenv ("M4");
- int pkg_data_len;
- char *full_skeleton;
-
- if (!m4)
- m4 = M4;
- if (!bison_pkgdatadir)
- bison_pkgdatadir = PKGDATADIR;
- pkg_data_len = strlen (bison_pkgdatadir);
- full_skeleton = XMALLOC (char, pkg_data_len + strlen (skeleton) + 2);
- if (bison_pkgdatadir[pkg_data_len-1] == '/')
- sprintf (full_skeleton, "%s%s", bison_pkgdatadir, skeleton);
- else
- sprintf (full_skeleton, "%s/%s", bison_pkgdatadir, skeleton);
- if (trace_flag & trace_tools)
- fprintf (stderr,
- "running: %s -I %s m4sugar/m4sugar.m4 %s %s\n",
- m4, bison_pkgdatadir, definitions, full_skeleton);
- skel_in = readpipe (m4,
- "-I", bison_pkgdatadir,
- "m4sugar/m4sugar.m4",
- definitions,
- full_skeleton,
- NULL);
- XFREE (full_skeleton);
- if (!skel_in)
- error (EXIT_FAILURE, errno, "cannot run m4");
+ static bool initialized = false;
+ if (!initialized)
+ {
+ initialized = true;
+ obstack_init (&obstack_for_string);
+ }
+ skel_in = in;
+ skel__flex_debug = trace_flag & trace_skeleton;
skel_lex ();
-
/* Reclaim Flex's buffers. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
+ yylex_destroy ();
+}
+
+void
+skel_scanner_free (void)
+{
+ obstack_free (&obstack_for_string, 0);
+}
+
+static
+void at_directive_perform (char **outnamep, int *out_linenop)
+{
+ if (0 == strcmp (at_directive_name, "@basename"))
+ {
+ if (at_directive_argc > 1)
+ fail_for_at_directive_too_many_args ();
+ fputs (last_component (at_directive_argv[0]), yyout);
+ }
+ else if (0 == strcmp (at_directive_name, "@warn")
+ || 0 == strcmp (at_directive_name, "@complain")
+ || 0 == strcmp (at_directive_name, "@fatal"))
+ {
+ void (*func)(char const *, ...);
+ switch (at_directive_name[1])
+ {
+ case 'w': func = warn; break;
+ case 'c': func = complain; break;
+ case 'f': func = fatal; break;
+ default: aver (false); func = NULL; break;
+ }
+ switch (at_directive_argc)
+ {
+ case 1:
+ func (_(at_directive_argv[0]));
+ break;
+ case 2:
+ func (_(at_directive_argv[0]), at_directive_argv[1]);
+ break;
+ case 3:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2]);
+ break;
+ case 4:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2], at_directive_argv[3]);
+ break;
+ case 5:
+ func (_(at_directive_argv[0]), at_directive_argv[1],
+ at_directive_argv[2], at_directive_argv[3],
+ at_directive_argv[4]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args ();
+ break;
+ }
+ }
+ else if (0 == strcmp (at_directive_name, "@warn_at")
+ || 0 == strcmp (at_directive_name, "@complain_at")
+ || 0 == strcmp (at_directive_name, "@fatal_at"))
+ {
+ void (*func)(location, char const *, ...);
+ location loc;
+ if (at_directive_argc < 3)
+ fail_for_at_directive_too_few_args ();
+ switch (at_directive_name[1])
+ {
+ case 'w': func = warn_at; break;
+ case 'c': func = complain_at; break;
+ case 'f': func = fatal_at; break;
+ default: aver (false); func = NULL; break;
+ }
+ boundary_set_from_string (&loc.start, at_directive_argv[0]);
+ boundary_set_from_string (&loc.end, at_directive_argv[1]);
+ switch (at_directive_argc)
+ {
+ case 3:
+ func (loc, _(at_directive_argv[2]));
+ break;
+ case 4:
+ func (loc, _(at_directive_argv[2]), at_directive_argv[3]);
+ break;
+ case 5:
+ func (loc, _(at_directive_argv[2]), at_directive_argv[3],
+ at_directive_argv[4]);
+ break;
+ case 6:
+ func (loc, _(at_directive_argv[2]), at_directive_argv[3],
+ at_directive_argv[4], at_directive_argv[5]);
+ break;
+ case 7:
+ func (loc, _(at_directive_argv[2]), at_directive_argv[3],
+ at_directive_argv[4], at_directive_argv[5],
+ at_directive_argv[6]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args ();
+ break;
+ }
+ }
+ else if (0 == strcmp (at_directive_name, "@output"))
+ {
+ if (at_directive_argc > 1)
+ fail_for_at_directive_too_many_args ();
+ if (*outnamep)
+ {
+ free (*outnamep);
+ xfclose (yyout);
+ }
+ *outnamep = xstrdup (at_directive_argv[0]);
+ output_file_name_check (*outnamep);
+ yyout = xfopen (*outnamep, "w");
+ *out_linenop = 1;
+ }
+ else
+ fail_for_invalid_at (at_directive_name);
+}
+
+static void
+fail_for_at_directive_too_few_args (void)
+{
+ fatal (_("too few arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_at_directive_too_many_args (void)
+{
+ fatal (_("too many arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_invalid_at (char const *at)
+{
+ fatal ("invalid @ in skeleton: %s", at);
}
projects / bison.git / blobdiff