/* Scan Bison Skeletons. -*- C -*-
- Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software
+ Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#undef skel_wrap
#define skel_wrap() 1
-#include "system.h"
+#define FLEX_PREFIX(Id) skel_ ## Id
+#include "flex-scanner.h"
+#include <dirname.h>
#include <error.h>
#include <quotearg.h>
#include "files.h"
#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)
+ fputs (quotearg_style (c_quoting_style, String), yyout)
+static void at_directive_perform (int at_directive_argc,
+ char *at_directive_argv[],
+ char **outnamep, int *out_linenop);
+static void fail_for_at_directive_too_many_args (char const *at_directive_name);
+static void fail_for_at_directive_too_few_args (char const *at_directive_name);
+static void fail_for_invalid_at (char const *at);
%}
+
+%x SC_AT_DIRECTIVE_ARGS
+%x SC_AT_DIRECTIVE_SKIP_WS
+
%%
%{
- int lineno IF_LINT (= 0);
+ int out_lineno IF_LINT (= 0);
char *outname = NULL;
-%}
-
-"@output ".*\n {
- char const *file_name = yytext + sizeof "@output " - 1;
- yytext[yyleng - 1] = '\0';
-
- if (*file_name == '@')
- {
- if (strcmp (file_name, "@output_header_name@") == 0)
- file_name = spec_defines_file;
- else if (strcmp (file_name, "@output_parser_name@") == 0)
- file_name = parser_file_name;
- else
- fatal ("invalid token in skeleton: %s", yytext);
- }
- if (outname)
- {
- free (outname);
- xfclose (yyout);
- }
- outname = xstrdup (file_name);
- yyout = xfopen (outname, "w");
- lineno = 1;
-}
+ /* 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. at_directive_argv[0] is the directive name. */
+ #define AT_DIRECTIVE_ARGC_MAX 8
+ int at_directive_argc = 0;
+ char *at_directive_argv[AT_DIRECTIVE_ARGC_MAX];
+%}
"@@" fputc ('@', yyout);
"@{" fputc ('[', yyout);
"@}" fputc (']', yyout);
-"@oline@" fprintf (yyout, "%d", lineno + 1);
+"@oline@" fprintf (yyout, "%d", out_lineno + 1);
"@ofile@" QPUTS (outname);
"@dir_prefix@" QPUTS (dir_prefix);
-"@output_parser_name@" QPUTS (parser_file_name);
-"@output_header_name@" QPUTS (spec_defines_file);
+
+@[a-z_]+"(" {
+ yytext[yyleng-1] = '\0';
+ obstack_grow (&obstack_for_string, yytext, yyleng);
+ at_directive_argv[at_directive_argc++] =
+ obstack_finish (&obstack_for_string);
+ BEGIN SC_AT_DIRECTIVE_ARGS;
+}
/* This pattern must not match more than the previous @ patterns. */
-@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext);
-\n lineno++; ECHO;
+@[^@{}(\n]* fail_for_invalid_at (yytext);
+\n out_lineno++; ECHO;
[^@\n]+ ECHO;
-<<EOF>> {
+<INITIAL><<EOF>> {
if (outname)
{
free (outname);
}
return EOF;
}
+
+<SC_AT_DIRECTIVE_ARGS>{
+ [^@]+ { 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 (at_directive_argv[0]);
+
+ 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 (at_directive_argc, at_directive_argv,
+ &outname, &out_lineno);
+ obstack_free (&obstack_for_string, at_directive_argv[0]);
+ at_directive_argc = 0;
+ BEGIN INITIAL;
+ }
+ }
+
+ @.? { fail_for_invalid_at (yytext); }
+}
+
+<SC_AT_DIRECTIVE_SKIP_WS>{
+ [ \t\r\n]
+ . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; }
+}
+
+<SC_AT_DIRECTIVE_ARGS,SC_AT_DIRECTIVE_SKIP_WS>{
+ <<EOF>> {
+ fatal (_("unclosed %s directive in skeleton"), at_directive_argv[0]);
+ }
+}
+
%%
/*------------------------.
void
scan_skel (FILE *in)
{
+ 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 ();
+}
+
+void
+skel_scanner_free (void)
+{
+ obstack_free (&obstack_for_string, 0);
/* Reclaim Flex's buffers. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
+ yylex_destroy ();
+}
+
+static
+void at_directive_perform (int at_directive_argc,
+ char *at_directive_argv[],
+ char **outnamep, int *out_linenop)
+{
+ if (0 == strcmp (at_directive_argv[0], "@basename"))
+ {
+ if (at_directive_argc > 2)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ fputs (last_component (at_directive_argv[1]), yyout);
+ }
+ else if (0 == strcmp (at_directive_argv[0], "@warn")
+ || 0 == strcmp (at_directive_argv[0], "@complain")
+ || 0 == strcmp (at_directive_argv[0], "@fatal"))
+ {
+ void (*func)(char const *, ...);
+ switch (at_directive_argv[0][1])
+ {
+ case 'w': func = warn; break;
+ case 'c': func = complain; break;
+ case 'f': func = fatal; break;
+ default: aver (false); break;
+ }
+ switch (at_directive_argc)
+ {
+ case 2:
+ func (_(at_directive_argv[1]));
+ break;
+ case 3:
+ func (_(at_directive_argv[1]), at_directive_argv[2]);
+ break;
+ case 4:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3]);
+ break;
+ case 5:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3], at_directive_argv[4]);
+ break;
+ case 6:
+ func (_(at_directive_argv[1]), at_directive_argv[2],
+ at_directive_argv[3], at_directive_argv[4],
+ at_directive_argv[5]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ break;
+ }
+ }
+ else if (0 == strcmp (at_directive_argv[0], "@warn_at")
+ || 0 == strcmp (at_directive_argv[0], "@complain_at")
+ || 0 == strcmp (at_directive_argv[0], "@fatal_at"))
+ {
+ void (*func)(location, char const *, ...);
+ location loc;
+ if (at_directive_argc < 4)
+ fail_for_at_directive_too_few_args (at_directive_argv[0]);
+ switch (at_directive_argv[0][1])
+ {
+ case 'w': func = warn_at; break;
+ case 'c': func = complain_at; break;
+ case 'f': func = fatal_at; break;
+ default: aver (false); break;
+ }
+ boundary_set_from_string (&loc.start, at_directive_argv[1]);
+ boundary_set_from_string (&loc.end, at_directive_argv[2]);
+ switch (at_directive_argc)
+ {
+ case 4:
+ func (loc, _(at_directive_argv[3]));
+ break;
+ case 5:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4]);
+ break;
+ case 6:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5]);
+ break;
+ case 7:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5], at_directive_argv[6]);
+ break;
+ case 8:
+ func (loc, _(at_directive_argv[3]), at_directive_argv[4],
+ at_directive_argv[5], at_directive_argv[6],
+ at_directive_argv[7]);
+ break;
+ default:
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ break;
+ }
+ }
+ else if (0 == strcmp (at_directive_argv[0], "@output"))
+ {
+ if (at_directive_argc > 2)
+ fail_for_at_directive_too_many_args (at_directive_argv[0]);
+ if (*outnamep)
+ {
+ free (*outnamep);
+ xfclose (yyout);
+ }
+ *outnamep = xstrdup (at_directive_argv[1]);
+ output_file_name_check (*outnamep);
+ yyout = xfopen (*outnamep, "w");
+ *out_linenop = 1;
+ }
+ else
+ fail_for_invalid_at (at_directive_argv[0]);
+}
+
+static void
+fail_for_at_directive_too_few_args (char const *at_directive_name)
+{
+ fatal (_("too few arguments for %s directive in skeleton"),
+ at_directive_name);
+}
+
+static void
+fail_for_at_directive_too_many_args (char const *at_directive_name)
+{
+ 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);
}
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