Index: bison/src/bison/2.4.1/bison-2.4.1-src/src/files.c |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1-src/src/files.c (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1-src/src/files.c (revision 0) |
@@ -0,0 +1,384 @@ |
+/* Open and close files for Bison. |
+ |
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004, |
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
+ |
+ This file is part of Bison, the GNU Compiler Compiler. |
+ |
+ 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. |
+ |
+ 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 this program. If not, see <http://www.gnu.org/licenses/>. */ |
+ |
+#include <config.h> |
+#include "system.h" |
+ |
+#include <error.h> |
+#include <dirname.h> |
+#include <get-errno.h> |
+#include <quote.h> |
+#include <stdio-safer.h> |
+#include <xstrndup.h> |
+ |
+#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; |
+ |
+/*-----------------------------------------------------------------. |
+| Return a newly allocated string composed of the concatenation of | |
+| STR1, and STR2. | |
+`-----------------------------------------------------------------*/ |
+ |
+static char * |
+concat2 (char const *str1, char const *str2) |
+{ |
+ size_t len = strlen (str1) + strlen (str2); |
+ char *res = xmalloc (len + 1); |
+ char *cp; |
+ cp = stpcpy (res, str1); |
+ cp = stpcpy (cp, str2); |
+ return res; |
+} |
+ |
+/*-----------------------------------------------------------------. |
+| Try to open file NAME with mode MODE, and print an error message | |
+| if fails. | |
+`-----------------------------------------------------------------*/ |
+ |
+FILE * |
+xfopen (const char *name, const char *mode) |
+{ |
+ FILE *ptr; |
+ |
+ ptr = fopen_safer (name, mode); |
+ if (!ptr) |
+ error (EXIT_FAILURE, get_errno (), _("cannot open file `%s'"), name); |
+ |
+ return ptr; |
+} |
+ |
+/*-------------------------------------------------------------. |
+| Try to close file PTR, and print an error message if fails. | |
+`-------------------------------------------------------------*/ |
+ |
+void |
+xfclose (FILE *ptr) |
+{ |
+ if (ptr == NULL) |
+ return; |
+ |
+ if (ferror (ptr)) |
+ error (EXIT_FAILURE, 0, _("I/O error")); |
+ |
+ if (fclose (ptr) != 0) |
+ error (EXIT_FAILURE, get_errno (), _("cannot close file")); |
+} |
+ |
+ |
+/*------------------------------------------------------------------. |
+| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. | |
+`------------------------------------------------------------------*/ |
+ |
+/* In the string S, replace all characters FROM by TO. */ |
+static void |
+tr (char *s, char from, char to) |
+{ |
+ for (; *s; s++) |
+ if (*s == from) |
+ *s = to; |
+} |
+ |
+/* 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 |
+compute_exts_from_src (const char *ext) |
+{ |
+ /* 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'); |
+} |
+ |
+ |
+/* 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) |
+{ |
+ *base = last_component (file_name); |
+ |
+ /* Look for the extension, i.e., look for the last dot. */ |
+ *ext = strrchr (*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; |
+ } |
+} |
+ |
+ |
+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) |
+ { |
+ 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 |
+ { |
+ 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); |
+ } |
+} |
+ |
+ |
+/* Compute the output file names. Warn if we detect conflicting |
+ outputs to the same file. */ |
+ |
+void |
+compute_output_file_names (void) |
+{ |
+ compute_file_name_parts (); |
+ |
+ /* If not yet done. */ |
+ if (!src_extension) |
+ src_extension = xstrdup (".c"); |
+ if (!header_extension) |
+ header_extension = xstrdup (".h"); |
+ |
+ parser_file_name = |
+ (spec_outfile |
+ ? xstrdup (spec_outfile) |
+ : concat2 (all_but_ext, src_extension)); |
+ |
+ 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); |
+ } |
+ |
+ free (all_but_tab_ext); |
+ free (src_extension); |
+ free (header_extension); |
+} |
+ |
+void |
+output_file_name_check (char const *file_name) |
+{ |
+ if (0 == strcmp (file_name, grammar_file)) |
+ fatal (_("refusing to overwrite the input file %s"), quote (file_name)); |
+ { |
+ 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)); |
+ } |
+ file_names = xnrealloc (file_names, ++file_names_count, sizeof *file_names); |
+ file_names[file_names_count-1] = xstrdup (file_name); |
+} |
+ |
+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); |
+} |
Property changes on: bison\src\bison\2.4.1\bison-2.4.1-src\src\files.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |