X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/18212466471c01a3943e10436979c29234665825..4323e0dac386d777d070c68564f1c0041b06935d:/src/scan-skel.l?ds=sidebyside diff --git a/src/scan-skel.l b/src/scan-skel.l index d860c08a..b79e5832 100644 --- a/src/scan-skel.l +++ b/src/scan-skel.l @@ -1,103 +1,311 @@ /* Scan Bison Skeletons. -*- C -*- - Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2001-2012 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison 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 2, or (at your option) - any later version. + 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. - Bison 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. + 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 Bison; see the file COPYING. If not, write to the Free - Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ + along with this program. If not, see . */ -%option nodefault noyywrap nounput never-interactive debug +%option nodefault noyywrap noinput nounput never-interactive debug %option prefix="skel_" outfile="lex.yy.c" %{ -#include "system.h" +/* Work around a bug in flex 2.5.31. See Debian bug 333231 + . */ +#undef skel_wrap +#define skel_wrap() 1 +#define FLEX_PREFIX(Id) skel_ ## Id +#include + +#include #include #include -#include "complain.h" -#include "getargs.h" -#include "files.h" +#include +#include +#include +#include -int skel_lex (void); +#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 PACIFY_CC (= 0); char *outname = NULL; + + /* 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]; %} -"@output ".*\n { - char const *filename = yytext + sizeof "@output " - 1; - yytext[yyleng - 1] = '\0'; +"@@" fputc ('@', yyout); +"@{" fputc ('[', yyout); +"@}" fputc (']', yyout); +"@`" continue; /* Used by b4_cat in ../data/bison.m4. */ +@\n continue; - if (*filename == '@') - { - if (strcmp (filename, "@output_header_name@") == 0) - filename = spec_defines_file; - else if (strcmp (filename, "@output_parser_name@") == 0) - filename = parser_file_name; - else - fatal ("invalid token in skeleton: %s", yytext); - } +"@oline@" fprintf (yyout, "%d", out_lineno + 1); +"@ofile@" QPUTS (outname); +@[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]* fail_for_invalid_at (yytext); +\n out_lineno++; ECHO; +[^@\n]+ ECHO; + +<> { if (outname) { free (outname); xfclose (yyout); } - outname = xstrdup (filename); - yyout = xfopen (outname, "w"); - lineno = 1; + return EOF; } -"@@" fputc ('@', yyout); -"@{" fputc ('[', yyout); -"@}" fputc (']', yyout); + +{ + [^@]+ STRING_GROW; -"@oline@" fprintf (yyout, "%d", lineno + 1); -"@ofile@" QPUTS (outname); -"@output_parser_name@" QPUTS (parser_file_name); -"@output_header_name@" QPUTS (spec_defines_file); + "@@" 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; - /* This pattern must not match more than the previous @ patterns. */ -@[^{}@\n]* fatal ("invalid @ in skeleton: %s", yytext); -\n lineno++; ECHO; -[^@\n]+ ECHO; + @[,)] { + 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); +} + + +{ + [ \t\r\n] continue; + . { yyless (0); BEGIN SC_AT_DIRECTIVE_ARGS; } +} + + +{ + <> { + complain (fatal, _("unclosed %s directive in skeleton"), + at_directive_argv[0]); + } +} -<> free (outname); xfclose (yyout); return EOF; %% /*------------------------. | Scan a Bison skeleton. | `------------------------*/ -void scan_skel (FILE *); - 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 (STREQ (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 (STREQ (at_directive_argv[0], "@warn") + || STREQ (at_directive_argv[0], "@complain") + || STREQ (at_directive_argv[0], "@fatal")) + { + warnings complaint_flag; + switch (at_directive_argv[0][1]) + { + case 'w': complaint_flag = Wother; break; + case 'c': complaint_flag = complaint; break; + case 'f': complaint_flag = fatal; break; + default: aver (false); break; + } + switch (at_directive_argc) + { + case 2: + complain (complaint_flag, "%s", _(at_directive_argv[1])); + break; + case 3: + complain (complaint_flag, _(at_directive_argv[1]), + at_directive_argv[2]); + break; + case 4: + complain (complaint_flag, _(at_directive_argv[1]), + at_directive_argv[2], at_directive_argv[3]); + break; + case 5: + complain (complaint_flag, _(at_directive_argv[1]), + at_directive_argv[2], at_directive_argv[3], + at_directive_argv[4]); + break; + case 6: + complain (complaint_flag, _(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 (STREQ (at_directive_argv[0], "@warn_at") + || STREQ (at_directive_argv[0], "@complain_at") + || STREQ (at_directive_argv[0], "@fatal_at")) + { + warnings complaint_flag; + 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': complaint_flag = Wother; break; + case 'c': complaint_flag = complaint; break; + case 'f': complaint_flag = fatal; 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: + complain_at (loc, complaint_flag, "%s", _(at_directive_argv[3])); + break; + case 5: + complain_at (loc, complaint_flag, _(at_directive_argv[3]), + at_directive_argv[4]); + break; + case 6: + complain_at (loc, complaint_flag, _(at_directive_argv[3]), + at_directive_argv[4], at_directive_argv[5]); + break; + case 7: + complain_at (loc, complaint_flag, _(at_directive_argv[3]), + at_directive_argv[4], at_directive_argv[5], + at_directive_argv[6]); + break; + case 8: + complain_at (loc, complaint_flag, _(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 (STREQ (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) +{ + complain (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 (fatal, _("too many arguments for %s directive in skeleton"), + at_directive_name); +} + +static void +fail_for_invalid_at (char const *at) +{ + complain (fatal, "invalid @ in skeleton: %s", at); }