X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ff4423cc2856ccc63b0fc72430fdc095208e0b14..7aa15a002657765f171865c11e368782f6109f7d:/src/files.c
diff --git a/src/files.c b/src/files.c
index 7433076a..f698c7e9 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1,80 +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;
-struct obstack action_obstack;
-struct obstack attrs_obstack;
-struct obstack table_obstack;
-struct obstack defines_obstack;
-struct obstack guard_obstack;
-struct obstack output_obstack;
+#include
+#include
+#include
+#include
+#include
+#include
+#include
-char *spec_outfile; /* for -o. */
-char *spec_file_prefix; /* for -b. */
-char *spec_name_prefix; /* for -p. */
-
-char *infile;
-char *attrsfile;
-
-static char *base_name;
-static char *short_base_name;
+#include "complain.h"
+#include "files.h"
+#include "getargs.h"
+#include "gram.h"
+/* 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;
-/*--------------------------.
-| Is SUFFIX ending STRING? |
-`--------------------------*/
-
-static int
-strsuffix (const char *string, const char *suffix)
-{
- size_t string_len = strlen (string);
- size_t suffix_len = strlen (suffix);
- if (suffix_len <= string_len)
- return !strcmp (string + string_len - suffix_len, suffix);
- else
- return 0;
-}
-
-
/*-----------------------------------------------------------------.
| Return a newly allocated string composed of the concatenation of |
-| STRING1, and STRING2. |
+| STR1, and STR2. |
`-----------------------------------------------------------------*/
static char *
-stringappend (const char *string1, const char *string2)
+concat2 (char const *str1, char const *str2)
{
- size_t len = strlen (string1) + strlen (string2);
- char *res = XMALLOC (char, len + 1);
+ size_t len = strlen (str1) + strlen (str2);
+ char *res = xmalloc (len + 1);
char *cp;
- cp = stpcpy (res, string1);
- cp = stpcpy (cp, string2);
+ cp = stpcpy (res, str1);
+ cp = stpcpy (cp, str2);
return res;
}
@@ -88,9 +108,10 @@ 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;
}
@@ -99,203 +120,277 @@ xfopen (const char *name, const char *mode)
| Try to close file PTR, and print an error message if fails. |
`-------------------------------------------------------------*/
-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"));
}
+
+
+/*------------------------------------------------------------------.
+| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. |
+`------------------------------------------------------------------*/
-/*--------------------------------------------------.
-| Save the content of the obstack OBS in FILENAME. |
-`--------------------------------------------------*/
+/* 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');
}
-/*------------------------------------------------------------------.
-| Return the path to the skeleton which locaction might be given in |
-| ENVVAR, otherwise return 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.
-const char *
-skeleton_find (const char *envvar, const char *skeleton)
-{
- const char *res = getenv (envvar);
+ *EXT points to the last period in the basename, or NULL if none.
-#ifdef MSDOS
- const char *cp;
+ 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.
- /* File doesn't exist in current directory; try in INIT directory. */
- if (!res && (cp = getenv ("INIT")))
- {
- res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2);
- sprintf (res, "%s%c%s", cp, '/', skeleton);
- }
-#endif /* !MSDOS */
+ None are allocated, they are simply pointers to parts of FILE_NAME.
+ Examples:
- if (!res)
- res = skeleton;
+ '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT =
+ '.c'
- return res;
-}
+ 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c'
-
-/*----------------------------------------.
-| Compute BASE_NAME and SHORT_BASE_NAME. |
-`----------------------------------------*/
+ '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'
-/* FIXME: Should use xstrndup. */
+ 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL
+
+ 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */
static void
-compute_base_names (void)
+file_name_split (const char *file_name,
+ const char **base, const char **tab, const char **ext)
{
- size_t base_length;
- size_t short_base_length;
+ *base = last_component (file_name);
+
+ /* Look for the extension, i.e., look for the last dot. */
+ *ext = mbsrchr (*base, '.');
+ *tab = NULL;
+
+ /* If there is an extension, check if there is a `.tab' part right
+ before. */
+ if (*ext)
+ {
+ 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;
+ }
+}
- /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
- BASE_NAME and SHORT_BASE_NAME are `foo'.
- If --output=foo.tab.c was specified, BASE_NAME is `foo.tab' and
- SHORT_BASE_NAME is `foo'.
+static void
+compute_file_name_parts (void)
+{
+ 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)
{
-#ifdef MSDOS
- strlwr (spec_outfile);
-#endif /* MSDOS */
- /* BASE_LENGTH includes ".tab" but not ".c". */
- base_length = strlen (spec_outfile);
- if (strsuffix (spec_outfile, ".c"))
- base_length -= 2;
- base_name = strndup (spec_outfile, base_length);
- /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
- short_base_length = base_length;
- if (strsuffix (base_name, ".tab") || strsuffix (base_name, "_tab"))
- short_base_length -= 4;
- short_base_name = strndup (spec_outfile, short_base_length);
-
- return;
+ 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);
}
-
- /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME
- are `foo'.
-
- Construct names from it. */
- if (spec_file_prefix)
+ else
{
-#ifdef MSDOS
- strlwr (spec_file_prefix);
-#endif /* MSDOS */
- short_base_name = xstrdup (spec_file_prefix);
-
- base_name = XMALLOC (char,
- strlen (short_base_name) + strlen (EXT_TAB) + 1);
- stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
-
- return;
+ 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);
}
-
- /* If neither -o nor --file-prefix were specified, and the input
- file is foo.y, BASE_NAME is `foo.tab', and SHORT_BASE_NAME is
- `foo'.
-
- If --yacc is used, do as if the input file was `y.y'. */
- {
- const char *name_base = yacc_flag ? "y.y" : infile;
-
- /* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any. */
-
- base_length = strlen (name_base);
- if (strsuffix (name_base, ".y"))
- base_length -= 2;
- short_base_length = base_length;
- short_base_name = strndup (name_base, short_base_length);
-
- base_name = XMALLOC (char,
- strlen (short_base_name) + strlen (EXT_TAB) + 1);
- stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
-
- return;
- }
}
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
+
+/* Compute the output file names. Warn if we detect conflicting
+ outputs to the same file. */
void
-open_files (void)
+compute_output_file_names (void)
{
- compute_base_names ();
+ 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");
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
+ parser_file_name =
+ (spec_outfile
+ ? xstrdup (spec_outfile)
+ : concat2 (all_but_ext, src_extension));
- /* Initialize the obstacks. */
- obstack_init (&action_obstack);
- obstack_init (&attrs_obstack);
- obstack_init (&table_obstack);
- obstack_init (&defines_obstack);
- obstack_init (&guard_obstack);
- obstack_init (&output_obstack);
-}
+ if (defines_flag)
+ {
+ if (! spec_defines_file)
+ spec_defines_file = concat2 (all_but_ext, header_extension);
+ }
+
+ if (graph_flag)
+ {
+ if (! spec_graph_file)
+ spec_graph_file = concat2 (all_but_tab_ext, ".dot");
+ output_file_name_check (&spec_graph_file);
+ }
+ if (xml_flag)
+ {
+ if (! spec_xml_file)
+ spec_xml_file = concat2 (all_but_tab_ext, ".xml");
+ output_file_name_check (&spec_xml_file);
+ }
+ if (report_flag)
+ {
+ if (!spec_verbose_file)
+ spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT);
+ output_file_name_check (&spec_verbose_file);
+ }
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files. |
-`-----------------------------------------------------*/
+ free (all_but_tab_ext);
+ free (src_extension);
+ free (header_extension);
+}
void
-output_files (void)
+output_file_name_check (char **file_name)
{
- xfclose (finput);
-
- /* Output the main file. */
- if (spec_outfile)
- obstack_save (&table_obstack, spec_outfile);
+ 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
- obstack_save (&table_obstack, stringappend (base_name, ".c"));
-
- /* Output the header file if wanted. */
- if (defines_flag)
- obstack_save (&defines_obstack, stringappend (base_name, ".h"));
-
- /* If we output only the table, dump the actions in ACTFILE. */
- if (no_parser_flag)
- obstack_save (&action_obstack, stringappend (short_base_name, ".act"));
-
- /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
- into its own file, ATTTRSFILE. */
- if (semantic_parser)
{
- obstack_save (&attrs_obstack, attrsfile);
- obstack_save (&guard_obstack,
- stringappend (short_base_name, EXT_GUARD_C));
+ file_names = xnrealloc (file_names, ++file_names_count,
+ sizeof *file_names);
+ file_names[file_names_count-1] = xstrdup (*file_name);
}
+}
- if (verbose_flag)
- /* We used to use just .out if spec_name_prefix (-p) was used, but
- that conflicts with Posix. */
- obstack_save (&output_obstack, stringappend (short_base_name, EXT_OUTPUT));
+void
+output_file_names_free (void)
+{
+ 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);
}