X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/1509d42fcb8fb8a78d46f0c26b863cafd347bee5..dd31e17d7e415d3be8fc603f752f7e975297bcc2:/src/getargs.c?ds=sidebyside diff --git a/src/getargs.c b/src/getargs.c index 9f6aef4a..06e6e972 100644 --- a/src/getargs.c +++ b/src/getargs.c @@ -1,46 +1,175 @@ -/* Parse command line arguments for bison. - Copyright 1984, 1986, 1989, 1992, 2000, 2001, 2002 - Free Software Foundation, Inc. +/* Parse command line arguments for Bison. + + Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 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 . */ +#include #include "system.h" -#include "getopt.h" -#include "argmatch.h" +#include "output.h" + +#include +#include +#include +#include + +/* Hack to get to declare getopt with a prototype. */ +#if lint && ! defined __GNU_LIBRARY__ +# define __GNU_LIBRARY__ +# define HACK_FOR___GNU_LIBRARY___PROTOTYPE 1 +#endif + +#include + +#ifdef HACK_FOR___GNU_LIBRARY___PROTOTYPE +# undef __GNU_LIBRARY__ +# undef HACK_FOR___GNU_LIBRARY___PROTOTYPE +#endif + +#include + #include "complain.h" -#include "getargs.h" #include "files.h" +#include "getargs.h" +#include "muscle-tab.h" +#include "quote.h" +#include "uniqstr.h" + +bool defines_flag; +bool graph_flag; +bool xml_flag; +bool no_lines_flag; +bool token_table_flag; +bool yacc_flag; /* for -y */ + +bool nondeterministic_parser = false; +bool glr_parser = false; -int debug_flag = 0; -int defines_flag = 0; -int locations_flag = 0; -int no_lines_flag = 0; -int no_parser_flag = 0; int report_flag = report_none; -int token_table_flag = 0; -int yacc_flag = 0; /* for -y */ -int graph_flag = 0; int trace_flag = trace_none; +int warnings_flag = warnings_conflicts_sr | warnings_conflicts_rr + | warnings_other; + +static struct bison_language const valid_languages[] = { + { "c", "c-skel.m4", ".c", ".h", true }, + { "c++", "c++-skel.m4", ".cc", ".hh", true }, + { "java", "java-skel.m4", ".java", ".java", false }, + { "", "", "", "", false } +}; +int skeleton_prio = default_prio; const char *skeleton = NULL; +int language_prio = default_prio; +struct bison_language const *language = &valid_languages[0]; const char *include = NULL; -extern char *program_name; + +/** Decode an option's set of keys. + * + * \param option option being decoded. + * \param keys array of valid subarguments. + * \param values array of corresponding (int) values. + * \param all the all value. + * \param flags the flags to update + * \param args comma separated list of effective subarguments to decode. + * If 0, then activate all the flags. + * + * If VALUE != 0 then KEY sets flags and no-KEY clears them. + * If VALUE == 0 then KEY clears all flags from \c all and no-KEY sets all + * flags from \c all. Thus no-none = all and no-all = none. + */ +static void +flags_argmatch (const char *option, + const char * const keys[], const int values[], + int all, int *flags, char *args) +{ + if (args) + { + args = strtok (args, ","); + while (args) + { + int no = STRPREFIX_LIT ("no-", args) ? 3 : 0; + int value = XARGMATCH (option, args + no, keys, values); + if (value == 0) + { + if (no) + *flags |= all; + else + *flags &= ~all; + } + else + { + if (no) + *flags &= ~value; + else + *flags |= value; + } + args = strtok (NULL, ","); + } + } + else + *flags |= all; +} + +/** Decode a set of sub arguments. + * + * \param FlagName the flag familly to update. + * \param Args the effective sub arguments to decode. + * + * \arg FlagName_args the list of keys. + * \arg FlagName_types the list of values. + * \arg FlagName_all the all value. + * \arg FlagName_flag the flag to update. + */ +#define FLAGS_ARGMATCH(FlagName, Args) \ + flags_argmatch ("--" #FlagName, FlagName ## _args, FlagName ## _types, \ + FlagName ## _all, &FlagName ## _flag, Args) + + +/*----------------------. +| --report's handling. | +`----------------------*/ + +static const char * const report_args[] = +{ + /* In a series of synonyms, present the most meaningful first, so + that argmatch_valid be more readable. */ + "none", + "state", "states", + "itemset", "itemsets", + "lookahead", "lookaheads", "look-ahead", + "solved", + "all", + 0 +}; + +static const int report_types[] = +{ + report_none, + report_states, report_states, + report_states | report_itemsets, report_states | report_itemsets, + report_states | report_lookahead_tokens, + report_states | report_lookahead_tokens, + report_states | report_lookahead_tokens, + report_states | report_solved_conflicts, + report_all +}; + +ARGMATCH_VERIFY (report_args, report_types); /*---------------------. @@ -51,14 +180,20 @@ static const char * const trace_args[] = { /* In a series of synonyms, present the most meaningful first, so that argmatch_valid be more readable. */ - "none - no report", - "automaton - contruction of the automaton", + "none - no traces", + "scan - grammar scanner traces", + "parse - grammar parser traces", + "automaton - construction of the automaton", "bitsets - use of bitsets", - "grammar - reading, reducing of the grammar", + "grammar - reading, reducing the grammar", "resource - memory consumption (where available)", "sets - grammar sets: firsts, nullable etc.", + "muscles - m4 definitions passed to the skeleton", + "tools - m4 invocation", + "m4 - m4 traces", + "skeleton - skeleton postprocessing", "time - time consumption", - "tools - m4 invocation and preserve the temporary file", + "ielr - IELR conversion", "all - all of the above", 0 }; @@ -66,151 +201,166 @@ static const char * const trace_args[] = static const int trace_types[] = { trace_none, + trace_scan, + trace_parse, trace_automaton, trace_bitsets, trace_grammar, trace_resource, trace_sets, - trace_time, + trace_muscles, trace_tools, + trace_m4, + trace_skeleton, + trace_time, + trace_ielr, trace_all }; +ARGMATCH_VERIFY (trace_args, trace_types); -static void -trace_argmatch (char *args) -{ - ARGMATCH_ASSERT (trace_args, trace_types); - if (args) - { - args = strtok (args, ","); - do - { - int trace = XARGMATCH ("--trace", args, - trace_args, trace_types); - if (trace == trace_none) - trace_flag = trace_none; - else - trace_flag |= trace; - } - while ((args = strtok (NULL, ","))); - } - else - trace_flag = trace_all; -} +/*------------------------. +| --warnings's handling. | +`------------------------*/ -/*----------------------. -| --report's handling. | -`----------------------*/ - -static const char * const report_args[] = +static const char * const warnings_args[] = { /* In a series of synonyms, present the most meaningful first, so that argmatch_valid be more readable. */ - "none", - "state", "states", - "itemset", "itemsets", - "lookahead", "lookaheads", - "solved", - "all", + "none - no warnings", + "midrule-values - unset or unused midrule values", + "yacc - incompatibilities with POSIX Yacc", + "conflicts-sr - S/R conflicts", + "conflicts-rr - R/R conflicts", + "other - all other warnings", + "all - all of the above", + "error - warnings are errors", 0 }; -static const int report_types[] = +static const int warnings_types[] = { - report_none, - report_states, report_states, - report_states | report_itemsets, report_states | report_itemsets, - report_states | report_lookaheads, report_states | report_lookaheads, - report_states | report_solved_conflicts, - report_all + warnings_none, + warnings_midrule_values, + warnings_yacc, + warnings_conflicts_sr, + warnings_conflicts_rr, + warnings_other, + warnings_all, + warnings_error }; +ARGMATCH_VERIFY (warnings_args, warnings_types); -static void -report_argmatch (char *args) -{ - ARGMATCH_ASSERT (report_args, report_types); - args = strtok (args, ","); - do - { - int report = XARGMATCH ("--report", args, - report_args, report_types); - if (report == report_none) - report_flag = report_none; - else - report_flag |= report; - } - while ((args = strtok (NULL, ","))); -} -/*---------------------------. -| Display the help message. | -`---------------------------*/ +/*-------------------------------------------. +| Display the help message and exit STATUS. | +`-------------------------------------------*/ + +static void usage (int) ATTRIBUTE_NORETURN; static void -usage (FILE *stream) +usage (int status) { - /* Some efforts were made to ease the translators' task, please - continue. */ - fputs (_("\ -GNU bison generates parsers for LALR(1) grammars.\n"), stream); - putc ('\n', stream); - - fprintf (stream, _("\ -Usage: %s [OPTION]... FILE\n"), program_name); - putc ('\n', stream); - - fputs (_("\ -If a long option shows an argument as mandatory, then it is mandatory\n\ -for the equivalent short option also. Similarly for optional arguments.\n"), - stream); - putc ('\n', stream); - - fputs (_("\ + if (status != 0) + fprintf (stderr, _("Try `%s --help' for more information.\n"), + program_name); + else + { + /* For ../build-aux/cross-options.pl to work, use the format: + ^ -S, --long[=ARGS] (whitespace) + A --long option is required. + Otherwise, add exceptions to ../build-aux/cross-options.pl. */ + + printf (_("Usage: %s [OPTION]... FILE\n"), program_name); + fputs (_("\ +Generate a deterministic LR or generalized LR (GLR) parser employing\n\ +LALR(1), IELR(1), or canonical LR(1) parser tables. IELR(1) and\n\ +canonical LR(1) support is experimental.\n\ +\n\ +"), stdout); + + fputs (_("\ +Mandatory arguments to long options are mandatory for short options too.\n\ +"), stdout); + fputs (_("\ +The same is true for optional arguments.\n\ +"), stdout); + + fputs (_("\ +\n\ Operation modes:\n\ - -h, --help display this help and exit\n\ - -V, --version output version information and exit\n\ - -y, --yacc emulate POSIX yacc\n"), stream); - putc ('\n', stream); - - fputs (_("\ + -h, --help display this help and exit\n\ + -V, --version output version information and exit\n\ + --print-localedir output directory containing locale-dependent data\n\ + --print-datadir output directory containing skeletons and XSLT\n\ + -y, --yacc emulate POSIX Yacc\n\ + -W, --warnings[=CATEGORY] report the warnings falling in CATEGORY\n\ +\n\ +"), stdout); + + fputs (_("\ Parser:\n\ - -S, --skeleton=FILE specify the skeleton to use\n\ - -t, --debug instrument the parser for debugging\n\ - --locations enable locations computation\n\ - -p, --name-prefix=PREFIX prepend PREFIX to the external symbols\n\ - -l, --no-lines don't generate `#line' directives\n\ - -n, --no-parser generate the tables only\n\ - -k, --token-table include a table of token names\n\ -"), stream); - putc ('\n', stream); - - fputs (_("\ + -L, --language=LANGUAGE specify the output programming language\n\ + (this is an experimental feature)\n\ + -S, --skeleton=FILE specify the skeleton to use\n\ + -t, --debug instrument the parser for tracing\n\ + same as `-Dparse.trace'\n\ + --locations enable location support\n\ + -D, --define=NAME[=VALUE] similar to `%define NAME \"VALUE\"'\n\ + -F, --force-define=NAME[=VALUE] override `%define NAME \"VALUE\"'\n\ + -p, --name-prefix=PREFIX prepend PREFIX to the external symbols\n\ + -l, --no-lines don't generate `#line' directives\n\ + -k, --token-table include a table of token names\n\ +\n\ +"), stdout); + + /* Keep -d and --defines separate so that ../build-aux/cross-options.pl + * won't assume that -d also takes an argument. */ + fputs (_("\ Output:\n\ - -d, --defines also produce a header file\n\ + --defines[=FILE] also produce a header file\n\ + -d likewise but cannot specify FILE (for POSIX Yacc)\n\ -r, --report=THINGS also produce details on the automaton\n\ + --report-file=FILE write report to FILE\n\ -v, --verbose same as `--report=state'\n\ -b, --file-prefix=PREFIX specify a PREFIX for output files\n\ -o, --output=FILE leave output to FILE\n\ - -g, --graph also produce a VCG description of the automaton\n\ -"), stream); - putc ('\n', stream); - - fputs (_("\ + -g, --graph[=FILE] also output a graph of the automaton\n\ + -x, --xml[=FILE] also output an XML report of the automaton\n\ + (the XML schema is experimental)\n\ +\n\ +"), stdout); + + fputs (_("\ +Warning categories include:\n\ + `midrule-values' unset or unused midrule values\n\ + `yacc' incompatibilities with POSIX Yacc\n\ + `conflicts-sr' S/R conflicts (enabled by default)\n\ + `conflicts-rr' R/R conflicts (enabled by default)\n\ + `other' all other warnings (enabled by default)\n\ + `all' all the warnings\n\ + `no-CATEGORY' turn off warnings in CATEGORY\n\ + `none' turn off all the warnings\n\ + `error' treat warnings as errors\n\ +\n\ +"), stdout); + + fputs (_("\ THINGS is a list of comma separated words that can include:\n\ `state' describe the states\n\ `itemset' complete the core item sets with their closure\n\ - `lookahead' explicitly associate lookaheads to items\n\ + `lookahead' explicitly associate lookahead tokens to items\n\ `solved' describe shift/reduce conflicts solving\n\ `all' include all the above information\n\ `none' disable the report\n\ -"), stream); - putc ('\n', stream); +"), stdout); - fputs (_("\ -Report bugs to .\n"), stream); + printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT); + } + + exit (status); } @@ -219,80 +369,150 @@ Report bugs to .\n"), stream); `------------------------------*/ static void -version (FILE *stream) +version (void) { /* Some efforts were made to ease the translators' task, please continue. */ - fprintf (stream, _("bison (GNU Bison) %s"), VERSION); - putc ('\n', stream); - fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stream); - putc ('\n', stream); + printf (_("bison (GNU Bison) %s"), VERSION); + putc ('\n', stdout); + fputs (_("Written by Robert Corbett and Richard Stallman.\n"), stdout); + putc ('\n', stdout); - fprintf (stream, - _("Copyright (C) %d Free Software Foundation, Inc.\n"), 2002); + fprintf (stdout, + _("Copyright (C) %d Free Software Foundation, Inc.\n"), + PACKAGE_COPYRIGHT_YEAR); fputs (_("\ This is free software; see the source for copying conditions. There is NO\n\ warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ "), - stream); + stdout); } +/*-------------------------------------. +| --skeleton and --language handling. | +`--------------------------------------*/ + +void +skeleton_arg (char const *arg, int prio, location loc) +{ + if (prio < skeleton_prio) + { + skeleton_prio = prio; + skeleton = arg; + } + else if (prio == skeleton_prio) + complain_at (loc, _("multiple skeleton declarations are invalid")); +} + +void +language_argmatch (char const *arg, int prio, location loc) +{ + char const *msg; + + if (prio < language_prio) + { + int i; + for (i = 0; valid_languages[i].language[0]; i++) + if (c_strcasecmp (arg, valid_languages[i].language) == 0) + { + language_prio = prio; + language = &valid_languages[i]; + return; + } + msg = _("%s: invalid language"); + } + else if (language_prio == prio) + msg = _("multiple language declarations are invalid"); + else + return; + + complain_at (loc, msg, quotearg_colon (arg)); +} + /*----------------------. | Process the options. | `----------------------*/ -/* Shorts options. */ -const char *short_options = "yvegdhr:ltknVo:b:p:S:T::"; +/* Shorts options. + Should be computed from long_options. */ +static char const short_options[] = + "D:" + "F:" + "L:" + "S:" + "T::" + "V" + "W::" + "b:" + "d" + "e" + "g::" + "h" + "k" + "l" + "n" + "o:" + "p:" + "r:" + "t" + "v" + "x::" + "y" + ; + +/* Values for long options that do not have single-letter equivalents. */ +enum +{ + LOCATIONS_OPTION = CHAR_MAX + 1, + PRINT_LOCALEDIR_OPTION, + PRINT_DATADIR_OPTION, + REPORT_FILE_OPTION +}; static struct option const long_options[] = { /* Operation modes. */ - { "help", no_argument, 0, 'h' }, - { "version", no_argument, 0, 'V' }, + { "help", no_argument, 0, 'h' }, + { "version", no_argument, 0, 'V' }, + { "print-localedir", no_argument, 0, PRINT_LOCALEDIR_OPTION }, + { "print-datadir", no_argument, 0, PRINT_DATADIR_OPTION }, + { "warnings", optional_argument, 0, 'W' }, /* Parser. */ - { "name-prefix", required_argument, 0, 'p' }, + { "name-prefix", required_argument, 0, 'p' }, { "include", required_argument, 0, 'I' }, /* Output. */ - { "file-prefix", required_argument, 0, 'b' }, - { "output", required_argument, 0, 'o' }, - { "output-file", required_argument, 0, 'o' }, - { "graph", optional_argument, 0, 'g' }, - { "report", required_argument, 0, 'r' }, - { "verbose", no_argument, 0, 'v' }, + { "file-prefix", required_argument, 0, 'b' }, + { "output", required_argument, 0, 'o' }, + { "output-file", required_argument, 0, 'o' }, + { "graph", optional_argument, 0, 'g' }, + { "xml", optional_argument, 0, 'x' }, + { "report", required_argument, 0, 'r' }, + { "report-file", required_argument, 0, REPORT_FILE_OPTION }, + { "verbose", no_argument, 0, 'v' }, /* Hidden. */ { "trace", optional_argument, 0, 'T' }, - /* FIXME: semantic parsers will output an `include' of an - output file: be sure that the naem included is indeed the name of - the output file. */ /* FIXME Should we activate this options ? - */ - { "output", required_argument, 0, 'o' }, - { "file-prefix", required_argument, 0, 'b' }, - { "name-prefix", required_argument, 0, 'p' }, - - /* - * Percent and command line declarations. - */ - /* Output. */ { "defines", optional_argument, 0, 'd' }, /* Operation modes. */ { "fixed-output-files", no_argument, 0, 'y' }, - { "yacc", no_argument, 0, 'y' }, + { "yacc", no_argument, 0, 'y' }, /* Parser. */ - { "debug", no_argument, 0, 't' }, - { "locations", no_argument, &locations_flag, 1 }, + { "debug", no_argument, 0, 't' }, + { "define", required_argument, 0, 'D' }, + { "force-define", required_argument, 0, 'F' }, + { "locations", no_argument, 0, LOCATIONS_OPTION }, { "no-lines", no_argument, 0, 'l' }, - { "no-parser", no_argument, 0, 'n' }, { "raw", no_argument, 0, 0 }, { "skeleton", required_argument, 0, 'S' }, + { "language", required_argument, 0, 'L' }, { "token-table", no_argument, 0, 'k' }, {0, 0, 0, 0} @@ -306,105 +526,173 @@ static struct option const long_options[] = # define AS_FILE_NAME(File) (File) #endif +/* Build a location for the current command line argument. */ +static +location +command_line_location (void) +{ + location res; + /* "" is used in GCC's messages about -D. */ + boundary_set (&res.start, uniqstr_new (""), optind, -1); + res.end = res.start; + return res; +} + + void getargs (int argc, char *argv[]) { int c; - while ((c = getopt_long (argc, argv, short_options, long_options, NULL)) != EOF) + while ((c = getopt_long (argc, argv, short_options, long_options, NULL)) + != -1) switch (c) { + /* ASCII Sorting for short options (i.e., upper case then + lower case), and then long-only options. */ + case 0: - /* Certain long options cause getopt_long to return 0. */ - break; + /* Certain long options cause getopt_long to return 0. */ + break; + + case 'D': /* -DNAME[=VALUE]. */ + case 'F': /* -FNAME[=VALUE]. */ + { + char* name = optarg; + char* value = mbschr (optarg, '='); + if (value) + *value++ = 0; + muscle_percent_define_insert (name, command_line_location (), + value ? value : "", + c == 'D' ? MUSCLE_PERCENT_DEFINE_D + : MUSCLE_PERCENT_DEFINE_F); + } + break; - case 'y': - yacc_flag = 1; - break; + case 'I': + include = AS_FILE_NAME (optarg); + break; - case 'h': - usage (stdout); - exit (0); + case 'L': + language_argmatch (optarg, command_line_prio, + command_line_location ()); + break; - case 'V': - version (stdout); - exit (0); + case 'S': + skeleton_arg (AS_FILE_NAME (optarg), command_line_prio, + command_line_location ()); + break; - case 'g': - /* Here, the -g and --graph=FILE options are differentiated. */ - graph_flag = 1; - spec_graph_file = AS_FILE_NAME (optarg); - break; + case 'T': + FLAGS_ARGMATCH (trace, optarg); + break; - case 'v': - report_flag |= report_states; - break; + case 'V': + version (); + exit (EXIT_SUCCESS); - case 'S': - skeleton = AS_FILE_NAME (optarg); - break; + case 'W': + FLAGS_ARGMATCH (warnings, optarg); + break; - case 'I': - include = AS_FILE_NAME (optarg); - break; + case 'b': + spec_file_prefix = AS_FILE_NAME (optarg); + break; case 'd': - /* Here, the -d and --defines options are differentiated. */ - defines_flag = 1; - if (optarg) - spec_defines_file = AS_FILE_NAME (optarg); - break; + /* Here, the -d and --defines options are differentiated. */ + defines_flag = true; + if (optarg) + spec_defines_file = xstrdup (AS_FILE_NAME (optarg)); + break; - case 'l': - no_lines_flag = 1; - break; + case 'g': + graph_flag = true; + if (optarg) + spec_graph_file = xstrdup (AS_FILE_NAME (optarg)); + break; - case 'k': - token_table_flag = 1; - break; + case 'h': + usage (EXIT_SUCCESS); - case 'n': - no_parser_flag = 1; - break; + case 'k': + token_table_flag = true; + break; - case 't': - debug_flag = 1; - break; + case 'l': + no_lines_flag = true; + break; case 'o': - spec_outfile = AS_FILE_NAME (optarg); - break; - - case 'b': - spec_file_prefix = AS_FILE_NAME (optarg); - break; + spec_outfile = AS_FILE_NAME (optarg); + break; case 'p': - spec_name_prefix = optarg; - break; + spec_name_prefix = optarg; + break; case 'r': - report_argmatch (optarg); - break; + FLAGS_ARGMATCH (report, optarg); + break; - case 'T': - trace_argmatch (optarg); - break; + case 't': + muscle_percent_define_insert ("parse.trace", + command_line_location (), "", + MUSCLE_PERCENT_DEFINE_D); + break; + + case 'v': + report_flag |= report_states; + break; + + case 'x': + xml_flag = true; + if (optarg) + spec_xml_file = xstrdup (AS_FILE_NAME (optarg)); + break; + + case 'y': + yacc_flag = true; + break; + + case LOCATIONS_OPTION: + muscle_percent_define_ensure ("locations", + command_line_location (), true); + break; + + case PRINT_LOCALEDIR_OPTION: + printf ("%s\n", LOCALEDIR); + exit (EXIT_SUCCESS); + + case PRINT_DATADIR_OPTION: + printf ("%s\n", compute_pkgdatadir ()); + exit (EXIT_SUCCESS); + + case REPORT_FILE_OPTION: + spec_verbose_file = xstrdup (AS_FILE_NAME (optarg)); + break; default: - fprintf (stderr, _("Try `%s --help' for more information.\n"), - program_name); - exit (1); + usage (EXIT_FAILURE); } - if (optind == argc) + if (argc - optind != 1) { - fprintf (stderr, _("%s: no grammar file given\n"), program_name); - exit (1); + if (argc - optind < 1) + error (0, 0, _("%s: missing operand"), quotearg_colon (argv[argc - 1])); + else + error (0, 0, _("extra operand %s"), quote (argv[optind + 1])); + usage (EXIT_FAILURE); } - if (optind < argc - 1) - fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"), - program_name, argv[optind]); - infile = argv[optind]; + current_file = grammar_file = uniqstr_new (argv[optind]); + MUSCLE_INSERT_C_STRING ("file_name", grammar_file); +} + +void +tr (char *s, char from, char to) +{ + for (; *s; s++) + if (*s == from) + *s = to; }