-/* 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 <http://www.gnu.org/licenses/>. */
+#include <config.h>
#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 <error.h>
+#include <dirname.h>
+#include <get-errno.h>
+#include <quote.h>
+#include <stdio-safer.h>
+#include <xstrndup.h>
-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;
\f
/*-----------------------------------------------------------------.
| 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;
}
| 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 (), _("cannot open file '%s'"), name);
return ptr;
}
| 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, _("I/O error"));
- return result;
+ if (fclose (ptr) != 0)
+ error (EXIT_FAILURE, get_errno (), _("cannot close file"));
}
+\f
-/*--------------------------------------------------.
-| 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;
}
-\f
-/*-----------------------------------------------------------------.
-| 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);
}
projects / bison.git / blobdiff