-/* 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, 2001, 2002
+ Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
#include "system.h"
-#include "getargs.h"
+
+#include <error.h>
+#include <get-errno.h>
+
+#include "complain.h"
#include "files.h"
-#include "xalloc.h"
+#include "getargs.h"
#include "gram.h"
-#include "complain.h"
-FILE *finput = NULL;
+/* From basename.c. Almost a lie, as it returns a char *. */
+const char *base_name (char const *name);
-struct obstack action_obstack;
-struct obstack attrs_obstack;
-struct obstack table_obstack;
-struct obstack defines_obstack;
-struct obstack guard_obstack;
-struct obstack output_obstack;
+FILE *finput = NULL;
-char *spec_outfile; /* for -o. */
-char *spec_file_prefix; /* for -b. */
-char *spec_name_prefix; /* for -p. */
+struct obstack pre_prologue_obstack;
+struct obstack post_prologue_obstack;
-char *infile;
-char *attrsfile;
+/* 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. */
-static char *base_name;
-static char *short_base_name;
+char *spec_outfile = NULL; /* for -o. */
+char *spec_file_prefix = NULL; /* for -b. */
+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;
-\f
-/*--------------------------.
-| Is SUFFIX ending STRING? |
-`--------------------------*/
+uniqstr grammar_file = NULL;
+uniqstr current_file = NULL;
-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;
-}
+static char *full_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;
+/* Header file extension (if option ``-d'' is specified). */
+const char *header_extension = NULL;
+\f
/*-----------------------------------------------------------------.
| 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;
}
ptr = fopen (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. |
`-------------------------------------------------------------*/
-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 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 = xmalloc (strlen (in) + 1);
+
+ for (temp = out; *in; in++, out++)
+ if (*in == from)
+ *out = to;
+ else
+ *out = *in;
+ *out = 0;
+ return (temp);
+}
+
+/* Computes extensions from the grammar file extension. */
static void
-obstack_save (struct obstack *obs, const char *filename)
+compute_exts_from_gf (const char *ext)
{
- FILE *out = xfopen (filename, "w");
- size_t size = obstack_object_size (obs);
- fwrite (obstack_finish (obs), 1, size, out);
- xfclose (out);
+ 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. */
+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');
+}
+
+
+/* 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'
-/*------------------------------------------------------------------.
-| Return the path to the skeleton which locaction might be given in |
-| ENVVAR, otherwise return SKELETON. |
-`------------------------------------------------------------------*/
+ 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL
-const char *
-skeleton_find (const char *envvar, const char *skeleton)
+ 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */
+
+static void
+filename_split (const char *filename,
+ const char **base, const char **tab, const char **ext)
{
- const char *res = getenv (envvar);
+ *base = base_name (filename);
-#ifdef MSDOS
- const char *cp;
+ /* Look for the extension, i.e., look for the last dot. */
+ *ext = strrchr (*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
-/*----------------------------------------.
-| Compute BASE_NAME and SHORT_BASE_NAME. |
-`----------------------------------------*/
/* FIXME: Should use xstrndup. */
static void
compute_base_names (void)
{
- size_t base_length;
- size_t short_base_length;
+ 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);
- 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;
- }
+ filename_split (spec_outfile, &base, &tab, &ext);
- /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME
- are `foo'.
-
- Construct names from it. */
- if (spec_file_prefix)
- {
-#ifdef MSDOS
- strlwr (spec_file_prefix);
-#endif /* MSDOS */
- short_base_name = xstrdup (spec_file_prefix);
+ /* The full base name goes up the EXT, excluding it. */
+ full_base_name =
+ xstrndup (spec_outfile,
+ (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
- base_name = XMALLOC (char,
- strlen (short_base_name) + strlen (EXT_TAB) + 1);
- stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
+ /* 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))));
- return;
+ if (ext)
+ compute_exts_from_src (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);
+ /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab'
+ and SHORT_BASE_NAME = `foo'.
- return;
- }
+ Construct names from it. */
+ else
+ {
+ 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)));
+ }
+
+ full_base_name = xmalloc (strlen (short_base_name)
+ + strlen (TAB_EXT) + 1);
+ stpcpy (stpcpy (full_base_name, short_base_name), TAB_EXT);
+
+ /* Computes the extensions from the grammar file name. */
+ filename_split (grammar_file, &base, &tab, &ext);
+ if (ext && !yacc_flag)
+ compute_exts_from_gf (ext);
+ }
}
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names. |
+`-------------------------------------------------------*/
void
-open_files (void)
+compute_output_file_names (void)
{
compute_base_names ();
- finput = xfopen (infile, "r");
+ /* If not yet done. */
+ if (!src_extension)
+ src_extension = ".c";
+ if (!header_extension)
+ header_extension = ".h";
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-
- /* 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);
-}
+ parser_file_name =
+ spec_outfile ? spec_outfile : concat2 (full_base_name, src_extension);
+ /* It the defines filename if not given, we create it. */
+ if (!spec_defines_file)
+ spec_defines_file = concat2 (full_base_name, header_extension);
+ /* It the graph filename if not given, we create it. */
+ if (!spec_graph_file)
+ spec_graph_file = concat2 (short_base_name, ".vcg");
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files. |
-`-----------------------------------------------------*/
-
-void
-output_files (void)
-{
- xfclose (finput);
-
- /* Output the main file. */
- if (spec_outfile)
- obstack_save (&table_obstack, spec_outfile);
- 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));
- }
-
- 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));
+ spec_verbose_file = concat2 (short_base_name, OUTPUT_EXT);
}
projects / bison.git / blobdiff