/* Open and close files for bison,
- Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002
+ Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "system.h"
#include "getargs.h"
#include "files.h"
-#include "xalloc.h"
#include "gram.h"
+#include "error.h"
#include "complain.h"
+/* From basename.c. Almost a lie, as it returns a char *. */
+const char *base_name (char const *name);
+
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;
-struct obstack graph_obstack;
+struct obstack pre_prologue_obstack;
+struct obstack post_prologue_obstack;
+
+/* 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 *spec_outfile = NULL; /* for -o. */
char *spec_file_prefix = NULL; /* for -b. */
-char *spec_name_prefix = NULL; /* for -p. */
+const char *spec_name_prefix = NULL; /* for -p. */
+char *spec_verbose_file = NULL; /* for --verbose. */
+char *spec_graph_file = NULL; /* for -g. */
+char *spec_defines_file = NULL; /* for --defines. */
+char *parser_file_name = NULL;
+
+struniq_t grammar_file = NULL;
+struniq_t current_file = NULL;
-char *infile = NULL;
-char *attrsfile = NULL;
+static char *full_base_name = NULL;
-static char *base_name = NULL;
-static char *short_base_name = NULL;
+/* Prefix used to generate output file names. */
+char *short_base_name = NULL;
/* C source file extension (the parser source). */
const char *src_extension = NULL;
| Is SUFFIX ending STRING? |
`--------------------------*/
-static int
+int
strsuffix (const char *string, const char *suffix)
{
size_t string_len = strlen (string);
| STRING1, and STRING2. |
`-----------------------------------------------------------------*/
-static char *
+char*
stringappend (const char *string1, const char *string2)
{
size_t len = strlen (string1) + strlen (string2);
ptr = fopen (name, mode);
if (!ptr)
- error (2, errno, _("cannot open file `%s'"), name);
+ error (EXIT_FAILURE, errno, _("cannot open file `%s'"), name);
return ptr;
}
| Try to close file PTR, and print an error message if fails. |
`-------------------------------------------------------------*/
-int
+void
xfclose (FILE *ptr)
{
- int result;
-
if (ptr == NULL)
- return 0;
-
- result = fclose (ptr);
- if (result == EOF)
- error (2, errno, _("cannot close file"));
-
- return result;
-}
-
-/*--------------------------------------------------.
-| Save the content of the obstack OBS in FILENAME. |
-`--------------------------------------------------*/
-
-static void
-obstack_save (struct obstack *obs, const char *filename)
-{
- FILE *out = xfopen (filename, "w");
- size_t size = obstack_object_size (obs);
- fwrite (obstack_finish (obs), 1, size, out);
- xfclose (out);
-}
-
-
-/*------------------------------------------------------------------.
-| Return the path to the skeleton which locaction might be given in |
-| ENVVAR, otherwise return SKELETON_NAME. |
-`------------------------------------------------------------------*/
-
-const char *
-skeleton_find (const char *envvar, const char *skeleton_name)
-{
- const char *res = getenv (envvar);
-
-#ifdef MSDOS
- const char *cp;
-
- /* File doesn't exist in current directory; try in INIT directory. */
- if (!res && (cp = getenv ("INIT")))
- {
- res = XMALLOC (char, strlen (cp) + strlen (skeleton_name) + 2);
- sprintf (res, "%s%c%s", cp, '/', skeleton_name);
- }
-#endif /* !MSDOS */
+ return;
- if (!res)
- res = skeleton_name;
+ if (ferror (ptr))
+ error (EXIT_FAILURE, 0, _("I/O error"));
- return res;
+ if (fclose (ptr) != 0)
+ error (EXIT_FAILURE, errno, _("cannot close file"));
}
\f
return (temp);
}
-/* Gets the extension index in FILENAME. Returns 0 if fails to
- find an extension. */
-static int
-get_extension_index (const char *filename)
-{
- int len;
-
- len = strlen (filename);
-
- if (filename[len-- - 1] == '.')
- return (0);
-
- while ((len > 0) && (filename[len - 1] != '.'))
- if (filename[len - 1] == '/')
- return (0);
- else
- len--;
-
- return (len - 1);
-}
-
/* Computes extensions from the grammar file extension. */
static void
compute_exts_from_gf (const char *ext)
{
- /* Checks if SRC_EXTENSION is NULL. In the other case, %source_extension
- was specified in the grammar file. */
- if (src_extension == NULL)
- {
- src_extension = tr (ext, 'y', 'c');
- src_extension = tr (src_extension, 'Y', 'C');
- }
- /* Checks if HEADER_EXTENSION is NULL. In the other case,
- %header_extension was specified in the grammar file. */
- if (header_extension == NULL)
- {
- header_extension = tr (ext, 'y', 'h');
- header_extension = tr (header_extension, 'Y', 'H');
- }
+ src_extension = tr (ext, 'y', 'c');
+ src_extension = tr (src_extension, 'Y', 'C');
+ header_extension = tr (ext, 'y', 'h');
+ header_extension = tr (header_extension, 'Y', 'H');
}
/* Computes extensions from the given c source file extension. */
header_extension = tr (header_extension, 'C', 'H');
}
+
+/* Decompose FILENAME in four parts: *BASE, *TAB, and *EXT, the fourth
+ part, (the directory) is ranging from FILENAME 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 FILENAME.
+ 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
+filename_split (const char *filename,
+ const char **base, const char **tab, const char **ext)
+{
+ *base = base_name (filename);
+
+ /* Look for the extension, i.e., look for the last dot. */
+ *ext = strrchr (*base, '.');
+ *tab = NULL;
+
+ /* If there is an exentension, check if there is a `.tab' part right
+ before. */
+ if (*ext
+ && (*ext - *base) > (int) strlen (".tab")
+ && (!strncmp (*ext - strlen (".tab"), ".tab", strlen (".tab"))
+ || !strncmp (*ext - strlen ("_tab"), "_tab", strlen ("_tab"))))
+ *tab = *ext - strlen (".tab");
+}
+
+
/* FIXME: Should use xstrndup. */
static void
compute_base_names (void)
{
- size_t base_length;
- size_t short_base_length;
- size_t ext_index;
+ const char *base, *tab, *ext;
/* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
BASE_NAME and SHORT_BASE_NAME are `foo'.
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);
-
- ext_index = get_extension_index (spec_outfile);
- /* If the initial segment of extension contains 'c' or a 'C', I assume
- that it is a C or C++ source file. */
- if (ext_index)
- ext_index =
- (strspn (spec_outfile + ext_index + 1, "cC")) ? ext_index : 0;
- if (ext_index)
- {
- base_length -= strlen (spec_outfile + ext_index);
- compute_exts_from_src (spec_outfile + ext_index);
- }
+ filename_split (spec_outfile, &base, &tab, &ext);
- 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);
+ /* The full base name goes up the EXT, excluding it. */
+ full_base_name =
+ xstrndup (spec_outfile,
+ (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
- return;
+ /* The short base name goes up to TAB, excluding it. */
+ short_base_name =
+ 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'.
+ /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab'
+ and SHORT_BASE_NAME = `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);
-
- /* Computes the extensions from the garmmar file name. */
- ext_index = get_extension_index (infile);
- /* If the initial segment of extension contains a 'y' or a 'Y', I assume
- that it is a yacc or bison grammar file. */
- if (ext_index)
- ext_index = (strspn (infile + ext_index + 1, "yY")) ? ext_index : 0;
- if (ext_index)
- compute_exts_from_gf (infile + ext_index);
-
- return;
- }
-
- /* 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);
-
- ext_index = get_extension_index (name_base);
- /* If the initial segment of extension contains a 'y' or a 'Y', I assume
- that it is a yacc or bison grammar file. */
- if (ext_index)
- ext_index = (strspn (name_base + ext_index + 1, "yY")) ? ext_index : 0;
- if (ext_index)
- {
- base_length -= strlen (name_base + ext_index);
- compute_exts_from_gf (name_base + ext_index);
- }
-
- 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;
- }
-}
+ if (spec_file_prefix)
+ {
+ /* If --file-prefix=foo was specified, SHORT_BASE_NAME =
+ `foo'. */
+ short_base_name = xstrdup (spec_file_prefix);
+ }
+ else if (yacc_flag)
+ {
+ /* If --yacc, then the output is `y.tab.c'. */
+ short_base_name = xstrdup ("y");
+ }
+ else
+ {
+ /* Otherwise, the short base name is computed from the input
+ grammar: `foo/bar.yy' => `bar'. */
+ filename_split (grammar_file, &base, &tab, &ext);
+ short_base_name =
+ xstrndup (base,
+ (strlen (base) - (ext ? strlen (ext) : 0)));
+ }
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
+ full_base_name = XMALLOC (char,
+ strlen (short_base_name)
+ + strlen (EXT_TAB) + 1);
+ stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB);
-void
-open_files (void)
-{
- finput = xfopen (infile, "r");
-
- /* 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);
- obstack_init (&graph_obstack);
+ /* Computes the extensions from the grammar file name. */
+ filename_split (grammar_file, &base, &tab, &ext);
+ if (ext && !yacc_flag)
+ compute_exts_from_gf (ext);
+ }
}
-
-
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files. |
-`-----------------------------------------------------*/
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names. |
+`-------------------------------------------------------*/
void
-output_files (void)
+compute_output_file_names (void)
{
- xfclose (finput);
-
compute_base_names ();
- /* Set default extensions */
+ /* If not yet done. */
if (!src_extension)
src_extension = ".c";
if (!header_extension)
header_extension = ".h";
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-#ifndef MSDOS
- stringappend (attrsfile, header_extension);
-#endif /* MSDOS */
+ parser_file_name =
+ spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension);
- /* Output the main file. */
- if (spec_outfile)
- obstack_save (&table_obstack, spec_outfile);
- else
- obstack_save (&table_obstack, stringappend (base_name, src_extension));
-
- /* Output the header file if wanted. */
- if (defines_flag)
- obstack_save (&defines_obstack,
- stringappend (base_name, header_extension));
-
- /* 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)
- {
- char *temp_name;
-
- obstack_save (&attrs_obstack, attrsfile);
- temp_name = stringappend (short_base_name, EXT_GUARD_C);
-#ifndef MSDOS
- temp_name = stringappend (temp_name, src_extension);
-#endif /* MSDOS */
- obstack_save (&guard_obstack, temp_name);
- }
+ /* It the defines filename if not given, we create it. */
+ if (!spec_defines_file)
+ spec_defines_file = stringappend (full_base_name, header_extension);
- 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));
+ /* It the graph filename if not given, we create it. */
+ if (!spec_graph_file)
+ spec_graph_file = stringappend (short_base_name, ".vcg");
- if (graph_flag)
- obstack_save (&graph_obstack, stringappend (short_base_name, ".vcg"));
+ spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
}
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