/* Open and close files for bison,
- Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
+ Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
struct obstack defines_obstack;
struct obstack guard_obstack;
struct obstack output_obstack;
+struct obstack graph_obstack;
-char *spec_outfile; /* for -o. */
-char *spec_file_prefix; /* for -b. */
-char *spec_name_prefix; /* for -p. */
+char *spec_outfile = NULL; /* for -o. */
+char *spec_file_prefix = NULL; /* for -b. */
+char *spec_name_prefix = NULL; /* for -p. */
-char *infile;
-char *attrsfile;
+char *infile = NULL;
+char *attrsfile = NULL;
-static char *base_name;
-static char *short_base_name;
+static char *base_name = NULL;
+static char *short_base_name = NULL;
+/* C source file extension (the parser source). */
+const char *src_extension = NULL;
+/* Header file extension (if option ``-d'' is specified). */
+const char *header_extension = NULL;
\f
+
/*--------------------------.
| Is SUFFIX ending STRING? |
`--------------------------*/
return res;
}
+
+/*---------------------------------------------------------------.
+| Computes the macro name used to avoid double inclusion in the |
+| header of the parser and store it in header_macro_name. |
+`---------------------------------------------------------------*/
+
+static char *
+compute_header_macro (void)
+{
+ int ite;
+ char *macro_name;
+
+ macro_name = XMALLOC (char,
+ strlen (base_name) +
+ strlen (header_extension) + 1);
+
+ stpcpy (macro_name, base_name);
+ strcat (macro_name, header_extension);
+
+ for (ite = 0; macro_name[ite]; ite++)
+ if (macro_name[ite] == '.')
+ macro_name[ite] = '_';
+ else
+ {
+ if (islower (macro_name[ite]))
+ macro_name[ite] -= ('a' - 'A');
+ }
+ return macro_name;
+}
+
+
/*-----------------------------------------------------------------.
| Try to open file NAME with mode MODE, and print an error message |
| if fails. |
xfclose (out);
}
+/*---------------------------------------------------------------------.
+| Output double inclusion protection macros and saves defines_obstack |
+`---------------------------------------------------------------------*/
+
+static void
+defines_obstack_save (const char *filename)
+{
+ FILE *out = xfopen (filename, "w");
+ size_t size = obstack_object_size (&defines_obstack);
+ char *macro_name = compute_header_macro ();
+
+ fprintf (out, "#ifndef %s\n", macro_name);
+ fprintf (out, "# define %s\n\n", macro_name);
+ fwrite (obstack_finish (&defines_obstack), 1, size, out);
+ fprintf (out, "\n#endif /* not %s */\n", macro_name);
+
+ free (macro_name);
+ xfclose (out);
+}
/*------------------------------------------------------------------.
| Return the path to the skeleton which locaction might be given in |
-| ENVVAR, otherwise return SKELETON. |
+| ENVVAR, otherwise return SKELETON_NAME. |
`------------------------------------------------------------------*/
const char *
-skeleton_find (const char *envvar, const char *skeleton)
+skeleton_find (const char *envvar, const char *skeleton_name)
{
const char *res = getenv (envvar);
/* 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);
+ res = XMALLOC (char, strlen (cp) + strlen (skeleton_name) + 2);
+ sprintf (res, "%s%c%s", cp, '/', skeleton_name);
}
#endif /* !MSDOS */
if (!res)
- res = skeleton;
+ res = skeleton_name;
return res;
}
-
\f
-/*----------------------------------------.
-| Compute BASE_NAME and SHORT_BASE_NAME. |
-`----------------------------------------*/
+
+/*----------------------------------------------------------------.
+| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. |
+`----------------------------------------------------------------*/
+
+/* Replace all characters FROM by TO in the string IN.
+ and returns a new allocated string. */
+static char *
+tr (const char *in, char from, char to)
+{
+ char *temp;
+ char *out;
+
+ out = XMALLOC (char, strlen (in) + 1);
+
+ for (temp = out; *in; in++, out++)
+ if (*in == from)
+ *out = to;
+ else
+ *out = *in;
+ *out = 0;
+ 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');
+ }
+}
+
+/* Computes 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 = tr (ext, 'c', 'h');
+ header_extension = tr (header_extension, 'C', 'H');
+}
/* FIXME: Should use xstrndup. */
{
size_t base_length;
size_t short_base_length;
+ size_t ext_index;
/* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
BASE_NAME and SHORT_BASE_NAME are `foo'.
#endif /* MSDOS */
/* BASE_LENGTH includes ".tab" but not ".c". */
base_length = strlen (spec_outfile);
- if (strsuffix (spec_outfile, ".c"))
- base_length -= 2;
+
+ 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);
+ }
+
base_name = strndup (spec_outfile, base_length);
/* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
short_base_length = base_length;
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;
}
/* 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;
+
+ 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);
void
open_files (void)
{
- compute_base_names ();
-
finput = xfopen (infile, "r");
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-
/* Initialize the obstacks. */
obstack_init (&action_obstack);
obstack_init (&attrs_obstack);
obstack_init (&defines_obstack);
obstack_init (&guard_obstack);
obstack_init (&output_obstack);
+ obstack_init (&graph_obstack);
}
{
xfclose (finput);
+ compute_base_names ();
+
+ /* Set default extensions */
+ 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 */
+
/* Output the main file. */
if (spec_outfile)
obstack_save (&table_obstack, spec_outfile);
else
- obstack_save (&table_obstack, stringappend (base_name, ".c"));
+ 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, ".h"));
+ defines_obstack_save (stringappend (base_name, header_extension));
/* If we output only the table, dump the actions in ACTFILE. */
if (no_parser_flag)
into its own file, ATTTRSFILE. */
if (semantic_parser)
{
+ char *temp_name;
+
obstack_save (&attrs_obstack, attrsfile);
- obstack_save (&guard_obstack,
- stringappend (short_base_name, EXT_GUARD_C));
+ 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);
}
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));
+ obstack_save (&output_obstack,
+ stringappend (short_base_name, EXT_OUTPUT));
+
+ if (graph_flag)
+ obstack_save (&graph_obstack, stringappend (short_base_name, ".vcg"));
}
projects / bison.git / blobdiff