X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/55b9634155b80271df2b90a95d5f529e2371be28..63951be29fcb8e21146a9377176d53d509c575ca:/src/files.c diff --git a/src/files.c b/src/files.c index ccb47182..f698c7e9 100644 --- a/src/files.c +++ b/src/files.c @@ -1,82 +1,100 @@ -/* Open and close files for bison, - Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc. +/* Open and close files 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 "getargs.h" -#include "files.h" -#include "xalloc.h" -#include "gram.h" -#include "complain.h" -FILE *finput = NULL; -FILE *foutput = NULL; -FILE *fguard = NULL; -FILE *fparser = NULL; +#include +#include +#include +#include +#include +#include +#include -struct obstack action_obstack; -struct obstack attrs_obstack; -struct obstack table_obstack; -struct obstack defines_obstack; - -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; - -char *infile; -char *attrsfile; +#include "complain.h" +#include "files.h" +#include "getargs.h" +#include "gram.h" -static char *outfile; -static char *defsfile; -static char *tabfile; -static char *guardfile; -static char *actfile; +/* Initializing some values below (such SPEC_NAME_PREFIX to `yy') is + tempting, but don't do that: for the time being our handling of the + %directive vs --option leaves precedence to the options by deciding + that if a %directive sets a variable which is really set (i.e., not + NULL), then the %directive is ignored. As a result, %name-prefix, + for instance, will not be honored. */ + +char const *spec_outfile = NULL; /* for -o. */ +char const *spec_file_prefix = NULL; /* for -b. */ +char const *spec_name_prefix = NULL; /* for -p. */ +char *spec_verbose_file = NULL; /* for --verbose. */ +char *spec_graph_file = NULL; /* for -g. */ +char *spec_xml_file = NULL; /* for -x. */ +char *spec_defines_file = NULL; /* for --defines. */ +char *parser_file_name; + +/* All computed output file names. */ +static char **file_names = NULL; +static int file_names_count = 0; + +uniqstr grammar_file = NULL; +uniqstr current_file = NULL; + +/* If --output=dir/foo.c was specified, + DIR_PREFIX is `dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are `dir/foo'. + + If --output=dir/foo.tab.c was specified, DIR_PREFIX is `dir/', + ALL_BUT_EXT is `dir/foo.tab', and ALL_BUT_TAB_EXT is `dir/foo'. + + If --output was not specified but --file-prefix=dir/foo was specified, + ALL_BUT_EXT = `foo.tab' and ALL_BUT_TAB_EXT = `foo'. + + If neither --output nor --file was specified but the input grammar + is name dir/foo.y, ALL_BUT_EXT and ALL_BUT_TAB_EXT are `foo'. + + If neither --output nor --file was specified, DIR_PREFIX is the + empty string (meaning the current directory); otherwise it is + `dir/'. */ + +char *all_but_ext; +static char *all_but_tab_ext; +char *dir_prefix; + +/* C source file extension (the parser source). */ +static char *src_extension = NULL; +/* Header file extension (if option ``-d'' is specified). */ +static char *header_extension = NULL; /*-----------------------------------------------------------------. | Return a newly allocated string composed of the concatenation of | -| the END1 first chars of STRING1, and STRING2. | +| STR1, and STR2. | `-----------------------------------------------------------------*/ static char * -stringappend (const char *string1, int end1, const char *string2) +concat2 (char const *str1, char const *str2) { - char *res; + size_t len = strlen (str1) + strlen (str2); + char *res = xmalloc (len + 1); char *cp; - const char *cp1; - int i; - - cp1 = string2; - i = 0; - while (*cp1++) - i++; - - res = XCALLOC (char, i + end1 + 1); - - cp = res; - cp1 = string1; - for (i = 0; i < end1; i++) - *cp++ = *cp1++; - - cp1 = string2; - while ((*cp++ = *cp1++)) - ; - + cp = stpcpy (res, str1); + cp = stpcpy (cp, str2); return res; } @@ -85,14 +103,15 @@ stringappend (const char *string1, int end1, const char *string2) | if fails. | `-----------------------------------------------------------------*/ -static FILE * +FILE * xfopen (const char *name, const char *mode) { FILE *ptr; - ptr = fopen (name, mode); + ptr = fopen_safer (name, mode); if (!ptr) - error (2, errno, _("cannot open file `%s'"), name); + error (EXIT_FAILURE, get_errno (), + _("%s: cannot open"), quotearg_colon (name)); return ptr; } @@ -101,208 +120,277 @@ xfopen (const char *name, const char *mode) | Try to close file PTR, and print an error message if fails. | `-------------------------------------------------------------*/ -static int +void xfclose (FILE *ptr) { - int result; - if (ptr == NULL) - return 0; + return; - result = fclose (ptr); - if (result == EOF) - error (2, errno, _("cannot close file")); + if (ferror (ptr)) + error (EXIT_FAILURE, 0, _("input/output error")); - return result; + if (fclose (ptr) != 0) + error (EXIT_FAILURE, get_errno (), _("cannot close file")); } + -/*--------------------------------------------------. -| Save the content of the obstack OBS in FILENAME. | -`--------------------------------------------------*/ +/*------------------------------------------------------------------. +| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. | +`------------------------------------------------------------------*/ + +/* Compute extensions from the grammar file extension. */ +static void +compute_exts_from_gf (const char *ext) +{ + if (strcmp (ext, ".y") == 0) + { + src_extension = xstrdup (language->src_extension); + header_extension = xstrdup (language->header_extension); + } + else + { + src_extension = xstrdup (ext); + header_extension = xstrdup (ext); + tr (src_extension, 'y', 'c'); + tr (src_extension, 'Y', 'C'); + tr (header_extension, 'y', 'h'); + tr (header_extension, 'Y', 'H'); + } +} +/* Compute extensions from the given c source file extension. */ static void -obstack_save (struct obstack *obs, const char *filename) +compute_exts_from_src (const char *ext) { - FILE *out = xfopen (filename, "w"); - size_t size = obstack_object_size (obs); - fwrite (obstack_finish (obs), 1, size, out); - xfclose (out); + /* We use this function when the user specifies `-o' or `--output', + so the extenions must be computed unconditionally from the file name + given by this option. */ + src_extension = xstrdup (ext); + header_extension = xstrdup (ext); + tr (header_extension, 'c', 'h'); + tr (header_extension, 'C', 'H'); } -static const char * -skeleton_find (const char *envvar, const char *skeleton) +/* Decompose FILE_NAME in four parts: *BASE, *TAB, and *EXT, the fourth + part, (the directory) is ranging from FILE_NAME to the char before + *BASE, so we don't need an additional parameter. + + *EXT points to the last period in the basename, or NULL if none. + + If there is no *EXT, *TAB is NULL. Otherwise, *TAB points to + `.tab' or `_tab' if present right before *EXT, or is NULL. *TAB + cannot be equal to *BASE. + + None are allocated, they are simply pointers to parts of FILE_NAME. + Examples: + + '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT = + '.c' + + 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c' + + 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c' + + '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c' + + 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab' + + 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL + + 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */ + +static void +file_name_split (const char *file_name, + const char **base, const char **tab, const char **ext) { - const char *res = getenv (envvar); + *base = last_component (file_name); -#ifdef MSDOS - const char *cp; + /* Look for the extension, i.e., look for the last dot. */ + *ext = mbsrchr (*base, '.'); + *tab = NULL; - /* File doesn't exist in current directory; try in INIT directory. */ - if (!res && (cp = getenv ("INIT"))) + /* If there is an extension, check if there is a `.tab' part right + before. */ + if (*ext) { - res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2); - sprintf (res, "%s%c%s", cp, '/', skeleton); + size_t baselen = *ext - *base; + size_t dottablen = 4; + if (dottablen < baselen + && (strncmp (*ext - dottablen, ".tab", dottablen) == 0 + || strncmp (*ext - dottablen, "_tab", dottablen) == 0)) + *tab = *ext - dottablen; } -#endif /* !MSDOS */ - - if (!res) - res = skeleton; - - return res; } - -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ -void -open_files (void) +static void +compute_file_name_parts (void) { - char *name_base; - int base_length; - int short_base_length; + const char *base, *tab, *ext; + + /* Compute ALL_BUT_EXT and ALL_BUT_TAB_EXT from SPEC_OUTFILE + or GRAMMAR_FILE. + The precise -o name will be used for FTABLE. For other output + files, remove the ".c" or ".tab.c" suffix. */ if (spec_outfile) { - /* -o was specified. The precise -o name will be used for FTABLE. - For other output files, remove the ".c" or ".tab.c" suffix. */ - name_base = spec_outfile; -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ - /* BASE_LENGTH includes ".tab" but not ".c". */ - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".c")) - base_length -= 2; - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = base_length; - if (!strncmp (name_base + short_base_length - 4, ".tab", 4)) - short_base_length -= 4; - else if (!strncmp (name_base + short_base_length - 4, "_tab", 4)) - short_base_length -= 4; - } - else if (spec_file_prefix) - { - /* -b was specified. Construct names from it. */ - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = strlen (spec_file_prefix); - /* Count room for `.tab'. */ - base_length = short_base_length + 4; - name_base = XMALLOC (char, base_length + 1); - /* Append `.tab'. */ - strcpy (name_base, spec_file_prefix); - strcat (name_base, EXT_TAB); -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ + file_name_split (spec_outfile, &base, &tab, &ext); + dir_prefix = xstrndup (spec_outfile, base - spec_outfile); + + /* ALL_BUT_EXT goes up the EXT, excluding it. */ + all_but_ext = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); + + /* ALL_BUT_TAB_EXT goes up to TAB, excluding it. */ + all_but_tab_ext = + xstrndup (spec_outfile, + (strlen (spec_outfile) + - (tab ? strlen (tab) : (ext ? strlen (ext) : 0)))); + + if (ext) + compute_exts_from_src (ext); } else { - /* -o was not specified; compute output file name from input - or use y.tab.c, etc., if -y was specified. */ - - static char FIXED_NAME_BASE[] = "y.y"; - - name_base = yacc_flag ? FIXED_NAME_BASE : infile; + file_name_split (grammar_file, &base, &tab, &ext); + + if (spec_file_prefix) + { + /* If --file-prefix=foo was specified, ALL_BUT_TAB_EXT = `foo'. */ + dir_prefix = + xstrndup (spec_file_prefix, + last_component (spec_file_prefix) - spec_file_prefix); + all_but_tab_ext = xstrdup (spec_file_prefix); + } + else if (yacc_flag) + { + /* If --yacc, then the output is `y.tab.c'. */ + dir_prefix = xstrdup (""); + all_but_tab_ext = xstrdup ("y"); + } + else + { + /* Otherwise, ALL_BUT_TAB_EXT is computed from the input + grammar: `foo/bar.yy' => `bar'. */ + dir_prefix = xstrdup (""); + all_but_tab_ext = + xstrndup (base, (strlen (base) - (ext ? strlen (ext) : 0))); + } + + if (language->add_tab) + all_but_ext = concat2 (all_but_tab_ext, TAB_EXT); + else + all_but_ext = xstrdup (all_but_tab_ext); + + /* Compute the extensions from the grammar file name. */ + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } +} - /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */ - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".y")) - base_length -= 2; - short_base_length = base_length; +/* Compute the output file names. Warn if we detect conflicting + outputs to the same file. */ - name_base = stringappend (name_base, short_base_length, EXT_TAB); - base_length = short_base_length + 4; - } +void +compute_output_file_names (void) +{ + compute_file_name_parts (); - finput = xfopen (infile, "r"); + /* If not yet done. */ + if (!src_extension) + src_extension = xstrdup (".c"); + if (!header_extension) + header_extension = xstrdup (".h"); - if (!no_parser_flag) - fparser = xfopen (skeleton_find ("BISON_SIMPLE", BISON_SIMPLE), "r"); + parser_file_name = + (spec_outfile + ? xstrdup (spec_outfile) + : concat2 (all_but_ext, src_extension)); - if (verbose_flag) + if (defines_flag) { - /* We used to use just .out if spec_name_prefix (-p) was used, - but that conflicts with Posix. */ - outfile = stringappend (name_base, short_base_length, EXT_OUTPUT); - foutput = xfopen (outfile, "w"); + if (! spec_defines_file) + spec_defines_file = concat2 (all_but_ext, header_extension); } - if (no_parser_flag) + if (graph_flag) { - /* use permanent name for actions file */ - actfile = stringappend (name_base, short_base_length, ".act"); + if (! spec_graph_file) + spec_graph_file = concat2 (all_but_tab_ext, ".dot"); + output_file_name_check (&spec_graph_file); } - if (defines_flag) + if (xml_flag) { - defsfile = stringappend (name_base, base_length, ".h"); + if (! spec_xml_file) + spec_xml_file = concat2 (all_but_tab_ext, ".xml"); + output_file_name_check (&spec_xml_file); } - /* These are opened by `done' or `open_extra_files', if at all */ - if (spec_outfile) - tabfile = spec_outfile; - else - tabfile = stringappend (name_base, base_length, ".c"); - - attrsfile = stringappend (name_base, short_base_length, EXT_STYPE_H); - guardfile = stringappend (name_base, short_base_length, EXT_GUARD_C); + if (report_flag) + { + if (!spec_verbose_file) + spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT); + output_file_name_check (&spec_verbose_file); + } - /* Initialize the obstacks. */ - obstack_init (&action_obstack); - obstack_init (&attrs_obstack); - obstack_init (&table_obstack); - obstack_init (&defines_obstack); + free (all_but_tab_ext); + free (src_extension); + free (header_extension); } - - -/*--------------------------------------------------------------------. -| Open the output files needed only for the semantic parser. This | -| is done when %semantic_parser is seen in the declarations section. | -`--------------------------------------------------------------------*/ - void -open_extra_files (void) +output_file_name_check (char **file_name) { - xfclose (fparser); - - if (!no_parser_flag) - fparser = xfopen (skeleton_find ("BISON_HAIRY", BISON_HAIRY), "r"); - fguard = xfopen (guardfile, "w"); + bool conflict = false; + if (0 == strcmp (*file_name, grammar_file)) + { + complain (_("refusing to overwrite the input file %s"), + quote (*file_name)); + conflict = true; + } + else + { + int i; + for (i = 0; i < file_names_count; i++) + if (0 == strcmp (file_names[i], *file_name)) + { + warn (_("conflicting outputs to file %s"), + quote (*file_name)); + conflict = true; + } + } + if (conflict) + { + free (*file_name); + *file_name = strdup ("/dev/null"); + } + else + { + file_names = xnrealloc (file_names, ++file_names_count, + sizeof *file_names); + file_names[file_names_count-1] = xstrdup (*file_name); + } } - -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ - void -output_files (void) +output_file_names_free (void) { - xfclose (fguard); - xfclose (finput); - xfclose (fparser); - xfclose (foutput); - - /* Output the main file. */ - obstack_save (&table_obstack, tabfile); - - /* Output the header file if wanted. */ - if (defines_flag) - obstack_save (&defines_obstack, defsfile); - - /* If we output only the table, dump the actions in ACTFILE. - */ - if (no_parser_flag) - obstack_save (&action_obstack, actfile); - - /* If we produced a semantic parser ATTRS_OBSTACK must be dumped - into its own file, ATTTRSFILE. */ - if (semantic_parser) - obstack_save (&attrs_obstack, attrsfile); + free (all_but_ext); + free (spec_verbose_file); + free (spec_graph_file); + free (spec_xml_file); + free (spec_defines_file); + free (parser_file_name); + free (dir_prefix); + { + int i; + for (i = 0; i < file_names_count; i++) + free (file_names[i]); + } + free (file_names); }