| /* Scan Bison Skeletons. -*- C -*- |
| |
| Copyright (C) 2001-2015, 2018-2019 Free Software Foundation, Inc. |
| |
| This file is part of Bison, the GNU Compiler Compiler. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| %option nodefault noyywrap noinput nounput never-interactive debug |
| %option prefix="skel_" outfile="lex.yy.c" |
| |
| %{ |
| #include <dirname.h> |
| #include <error.h> |
| #include <path-join.h> |
| #include <quotearg.h> |
| |
| #include <src/complain.h> |
| #include <src/files.h> |
| #include <src/getargs.h> |
| #include <src/scan-skel.h> |
| |
| #define FLEX_PREFIX(Id) skel_ ## Id |
| #include <src/flex-scanner.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 YY_DECL static int skel_lex (void) |
| YY_DECL; |
| |
| typedef void (*at_directive)(int, char**, char **, int*); |
| static void at_init (int *argc, char *argv[], at_directive *at_ptr, at_directive fun); |
| static void at_basename (int argc, char *argv[], char**, int*); |
| static void at_complain (int argc, char *argv[], char**, int*); |
| static void at_output (int argc, char *argv[], char **name, int *lineno); |
| 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 out_lineno PACIFY_CC (= 0); |
| char *out_name = NULL; |
| |
| /* Currently, only the @complain directive takes multiple arguments, and |
| never more than 7, with argv[0] being the directive name and argv[1] |
| being the type of complaint to dispatch. */ |
| #define ARGC_MAX 9 |
| int argc = 0; |
| char *argv[ARGC_MAX]; |
| at_directive at_ptr = NULL; |
| %} |
| |
| "@@" fputc ('@', yyout); |
| "@{" fputc ('[', yyout); |
| "@}" fputc (']', yyout); |
| "@'" continue; /* Used by b4_cat in ../data/bison.m4. */ |
| @\n continue; |
| |
| "@oline@" fprintf (yyout, "%d", out_lineno + 1); |
| "@ofile@" fputs (quotearg_style (c_quoting_style, out_name), yyout); |
| |
| "@basename(" at_init (&argc, argv, &at_ptr, &at_basename); |
| "@complain(" at_init (&argc, argv, &at_ptr, &at_complain); |
| "@output(" at_init (&argc, argv, &at_ptr, &at_output); |
| |
| /* 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 (out_name) |
| { |
| free (out_name); |
| xfclose (yyout); |
| } |
| return EOF; |
| } |
| |
| <SC_AT_DIRECTIVE_ARGS> |
| { |
| [^@]+ STRING_GROW; |
| |
| "@@" obstack_1grow (&obstack_for_string, '@'); |
| "@{" obstack_1grow (&obstack_for_string, '['); |
| "@}" obstack_1grow (&obstack_for_string, ']'); |
| "@'" continue; /* For starting an argument that begins with whitespace. */ |
| @\n continue; |
| |
| @[,)] { |
| if (argc >= ARGC_MAX) |
| fail_for_at_directive_too_many_args (argv[0]); |
| |
| argv[argc++] = obstack_finish0 (&obstack_for_string); |
| |
| /* Like M4, skip whitespace after a comma. */ |
| if (yytext[1] == ',') |
| BEGIN SC_AT_DIRECTIVE_SKIP_WS; |
| else |
| { |
| aver (at_ptr); |
| at_ptr (argc, argv, &out_name, &out_lineno); |
| obstack_free (&obstack_for_string, argv[0]); |
| argc = 0; |
| BEGIN INITIAL; |
| } |
| } |
| |
| @.? fail_for_invalid_at (yytext); |
| } |
| |
| <SC_AT_DIRECTIVE_SKIP_WS> |
| { |
| [ \t\r\n] continue; |
| . yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; |
| } |
| |
| <SC_AT_DIRECTIVE_ARGS,SC_AT_DIRECTIVE_SKIP_WS> |
| { |
| <<EOF>> complain (NULL, fatal, _("unclosed %s directive in skeleton"), argv[0]); |
| } |
| |
| %% |
| |
| static void |
| at_init (int *argc, char *argv[], at_directive *at_ptr, at_directive fun) |
| { |
| *at_ptr = fun; |
| yytext[yyleng-1] = '\0'; |
| obstack_grow (&obstack_for_string, yytext, yyleng); |
| argv[(*argc)++] = obstack_finish (&obstack_for_string); |
| BEGIN SC_AT_DIRECTIVE_ARGS; |
| } |
| |
| /*------------------------. |
| | Scan a Bison skeleton. | |
| `------------------------*/ |
| |
| 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. */ |
| yylex_destroy (); |
| } |
| |
| static inline warnings |
| flag (const char *arg) |
| { |
| /* compare with values issued from b4_error */ |
| if (STREQ (arg, "complain")) |
| return complaint; |
| else if (STREQ (arg, "deprecated")) |
| return Wdeprecated; |
| else if (STREQ (arg, "fatal")) |
| return fatal; |
| else if (STREQ (arg, "note")) |
| return silent | complaint | no_caret; |
| else if (STREQ (arg, "warn")) |
| return Wother; |
| else |
| abort (); |
| } |
| |
| static void |
| at_basename (int argc, char *argv[], char **out_namep, int *out_linenop) |
| { |
| (void) out_namep; |
| (void) out_linenop; |
| if (2 < argc) |
| fail_for_at_directive_too_many_args (argv[0]); |
| fputs (last_component (argv[1]), yyout); |
| } |
| |
| static void |
| at_complain (int argc, char *argv[], char **out_namep, int *out_linenop) |
| { |
| if (argc < 4) |
| fail_for_at_directive_too_few_args (argv[0]); |
| |
| (void) out_namep; |
| (void) out_linenop; |
| |
| warnings w = flag (argv[1]); |
| |
| location loc; |
| location *locp = NULL; |
| if (argv[2] && argv[2][0]) |
| { |
| boundary_set_from_string (&loc.start, argv[2]); |
| boundary_set_from_string (&loc.end, argv[3]); |
| locp = &loc; |
| } |
| static int indent; |
| if (w & silent) |
| indent += SUB_INDENT; |
| else |
| indent = 0; |
| complain_args (locp, w, &indent, argc - 4, argv + 4); |
| if (w & silent) |
| indent -= SUB_INDENT; |
| } |
| |
| static void |
| at_output (int argc, char *argv[], char **out_namep, int *out_linenop) |
| { |
| if (3 < argc) |
| fail_for_at_directive_too_many_args (argv[0]); |
| if (*out_namep) |
| { |
| free (*out_namep); |
| xfclose (yyout); |
| } |
| *out_namep = xpath_join (argv[1], 2 < argc ? argv[2] : NULL); |
| output_file_name_check (out_namep, true); |
| /* If there were errors, do not generate the output. */ |
| yyout = xfopen (complaint_status ? "/dev/null" : *out_namep, "w"); |
| *out_linenop = 1; |
| } |
| |
| static void |
| fail_for_at_directive_too_few_args (char const *at_directive_name) |
| { |
| complain (NULL, 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) |
| { |
| complain (NULL, fatal, _("too many arguments for %s directive in skeleton"), |
| at_directive_name); |
| } |
| |
| static void |
| fail_for_invalid_at (char const *at) |
| { |
| complain (NULL, fatal, "invalid @ in skeleton: %s", at); |
| } |