-/* 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"
+
+/* From basename.c. Almost a lie, as it returns a char *. */
+const char *base_name (char const *name);
FILE *finput = NULL;
-FILE *foutput = NULL;
-FILE *fguard = NULL;
-FILE *fparser = NULL;
-
-struct obstack action_obstack;
-struct obstack attrs_obstack;
-struct obstack table_obstack;
-struct obstack defines_obstack;
-
-/* File name specified with -o for the output file, or 0 if no -o. */
-char *spec_outfile;
-
-char *infile;
-char *attrsfile;
-
-static char *outfile;
-static char *defsfile;
-static char *tabfile;
-static char *guardfile;
-static char *actfile;
+
+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. */
+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;
+
+uniqstr grammar_file = NULL;
+uniqstr current_file = NULL;
+
+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 |
-| the END1 first chars of STRING1, and STRING2. |
+| STR1, and STR2. |
`-----------------------------------------------------------------*/
static char *
-stringappend (const char *string1, int end1, const char *string2)
+concat2 (char const *str1, char const *str2)
{
- char *res;
+ size_t len = strlen (str1) + strlen (str2);
+ char *res = xmalloc (len + 1);
char *cp;
- const char *cp1;
- int i;
-
- cp1 = string2;
- i = 0;
- while (*cp1++)
- i++;
-
- res = XCALLOC (char, i + end1 + 1);
-
- cp = res;
- cp1 = string1;
- for (i = 0; i < end1; i++)
- *cp++ = *cp1++;
-
- cp1 = string2;
- while ((*cp++ = *cp1++))
- ;
-
+ cp = stpcpy (res, str1);
+ cp = stpcpy (cp, str2);
return res;
}
| if fails. |
`-----------------------------------------------------------------*/
-static FILE *
+FILE *
xfopen (const char *name, const char *mode)
{
FILE *ptr;
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. |
`-------------------------------------------------------------*/
-static 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. |
+`----------------------------------------------------------------*/
-static void
-obstack_save (struct obstack *obs, const char *filename)
+/* 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)
{
- FILE *out = xfopen (filename, "w");
- size_t size = obstack_object_size (obs);
- fwrite (obstack_finish (obs), 1, size, out);
- xfclose (out);
+ 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
+compute_exts_from_gf (const char *ext)
+{
+ 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');
+}
-static const char *
-skeleton_find (const char *envvar, const char *skeleton)
+/* Computes extensions from the given c source file extension. */
+static void
+compute_exts_from_src (const char *ext)
{
- const char *res = getenv (envvar);
+ /* 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');
+}
-#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) + 2);
- sprintf (res, "%s%c%s", cp, '/', skeleton);
- }
-#endif /* !MSDOS */
+/* 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.
- if (!res)
- res = skeleton;
+ *EXT points to the last period in the basename, or NULL if none.
- return res;
-}
+ 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.
-\f
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
+ None are allocated, they are simply pointers to parts of FILENAME.
+ Examples:
-void
-open_files (void)
-{
- char *name_base;
- int base_length;
- int short_base_length;
+ '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT =
+ '.c'
- if (spec_outfile)
- {
- /* -o was specified. The precise -o name will be used for FTABLE.
- For other output files, remove the ".c" or ".tab.c" suffix. */
- name_base = spec_outfile;
-#ifdef MSDOS
- strlwr (name_base);
-#endif /* MSDOS */
- /* BASE_LENGTH includes ".tab" but not ".c". */
- base_length = strlen (name_base);
- if (!strcmp (name_base + base_length - 2, ".c"))
- base_length -= 2;
- /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
- short_base_length = base_length;
- if (!strncmp (name_base + short_base_length - 4, ".tab", 4))
- short_base_length -= 4;
- else if (!strncmp (name_base + short_base_length - 4, "_tab", 4))
- short_base_length -= 4;
- }
- else if (spec_file_prefix)
- {
- /* -b was specified. Construct names from it. */
- /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */
- short_base_length = strlen (spec_file_prefix);
- /* Count room for `.tab'. */
- base_length = short_base_length + 4;
- name_base = XMALLOC (char, base_length + 1);
- /* Append `.tab'. */
- strcpy (name_base, spec_file_prefix);
- strcat (name_base, EXT_TAB);
-#ifdef MSDOS
- strlwr (name_base);
-#endif /* MSDOS */
- }
- else
- {
- /* -o was not specified; compute output file name from input
- or use y.tab.c, etc., if -y was specified. */
+ 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c'
- static char FIXED_NAME_BASE[] = "y.y";
+ 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c'
- name_base = yacc_flag ? FIXED_NAME_BASE : infile;
+ '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c'
- /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */
+ 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab'
- base_length = strlen (name_base);
- if (!strcmp (name_base + base_length - 2, ".y"))
- base_length -= 2;
- short_base_length = base_length;
+ 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL
- name_base = stringappend (name_base, short_base_length, EXT_TAB);
- base_length = short_base_length + 4;
- }
+ 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */
- finput = xfopen (infile, "r");
+static void
+filename_split (const char *filename,
+ const char **base, const char **tab, const char **ext)
+{
+ *base = base_name (filename);
- if (!no_parser_flag)
- fparser = xfopen (skeleton_find ("BISON_SIMPLE", BISON_SIMPLE), "r");
+ /* Look for the extension, i.e., look for the last dot. */
+ *ext = strrchr (*base, '.');
+ *tab = NULL;
- if (verbose_flag)
+ /* If there is an extension, check if there is a `.tab' part right
+ before. */
+ if (*ext)
{
- /* We used to use just .out if spec_name_prefix (-p) was used,
- but that conflicts with Posix. */
- outfile = stringappend (name_base, short_base_length, EXT_OUTPUT);
- foutput = xfopen (outfile, "w");
+ 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 (no_parser_flag)
- {
- /* use permanent name for actions file */
- actfile = stringappend (name_base, short_base_length, ".act");
- }
- if (defines_flag)
- {
- defsfile = stringappend (name_base, base_length, ".h");
- }
+/* FIXME: Should use xstrndup. */
- /* These are opened by `done' or `open_extra_files', if at all */
+static void
+compute_base_names (void)
+{
+ const char *base, *tab, *ext;
+
+ /* 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'.
+
+ The precise -o name will be used for FTABLE. For other output
+ files, remove the ".c" or ".tab.c" suffix. */
if (spec_outfile)
- tabfile = spec_outfile;
- else
- tabfile = stringappend (name_base, base_length, ".c");
+ {
+ filename_split (spec_outfile, &base, &tab, &ext);
- attrsfile = stringappend (name_base, short_base_length, EXT_STYPE_H);
- guardfile = stringappend (name_base, short_base_length, EXT_GUARD_C);
+ /* The full base name goes up the EXT, excluding it. */
+ full_base_name =
+ xstrndup (spec_outfile,
+ (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
- /* Initialize the obstacks. */
- obstack_init (&action_obstack);
- obstack_init (&attrs_obstack);
- obstack_init (&table_obstack);
- obstack_init (&defines_obstack);
-}
+ /* 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, FULL_BASE_NAME = `foo.tab'
+ and SHORT_BASE_NAME = `foo'.
+ 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 output files needed only for the semantic parser. This |
-| is done when %semantic_parser is seen in the declarations section. |
-`--------------------------------------------------------------------*/
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names. |
+`-------------------------------------------------------*/
void
-open_extra_files (void)
+compute_output_file_names (void)
{
- xfclose (fparser);
+ compute_base_names ();
- if (!no_parser_flag)
- fparser = xfopen (skeleton_find ("BISON_HAIRY", BISON_HAIRY), "r");
- fguard = xfopen (guardfile, "w");
-}
+ /* If not yet done. */
+ if (!src_extension)
+ src_extension = ".c";
+ if (!header_extension)
+ header_extension = ".h";
+ parser_file_name =
+ spec_outfile ? spec_outfile : concat2 (full_base_name, src_extension);
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files. |
-`-----------------------------------------------------*/
+ /* It the defines filename if not given, we create it. */
+ if (!spec_defines_file)
+ spec_defines_file = concat2 (full_base_name, header_extension);
-void
-output_files (void)
-{
- xfclose (fguard);
- xfclose (finput);
- xfclose (fparser);
- xfclose (foutput);
-
- /* Output the main file. */
- obstack_save (&table_obstack, tabfile);
-
- /* Output the header file if wanted. */
- if (defines_flag)
- obstack_save (&defines_obstack, defsfile);
-
- /* If we output only the table, dump the actions in ACTFILE.
- */
- if (no_parser_flag)
- obstack_save (&action_obstack, actfile);
-
- /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
- into its own file, ATTTRSFILE. */
- if (semantic_parser)
- obstack_save (&attrs_obstack, attrsfile);
+ /* It the graph filename if not given, we create it. */
+ if (!spec_graph_file)
+ spec_graph_file = concat2 (short_base_name, ".vcg");
+
+ spec_verbose_file = concat2 (short_base_name, OUTPUT_EXT);
}
projects / bison.git / blobdiff