-/* Open and close files for bison,
- Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
+/* Open and close files for Bison.
+
+ Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002, 2003, 2004
+ 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 <quote.h>
+#include <xstrndup.h>
+
+#include "complain.h"
#include "files.h"
+#include "getargs.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 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;
+
+uniqstr grammar_file = NULL;
+uniqstr 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;
/* Header file extension (if option ``-d'' is specified). */
const char *header_extension = NULL;
\f
-
-/*--------------------------.
-| Is SUFFIX ending STRING? |
-`--------------------------*/
-
-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;
-}
-
-
/*-----------------------------------------------------------------.
| 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;
}
-
-/*-----------------------------------------------------------------.
-| Computes the macro name used to avoid double inclusion in the |
-| header of the parser and store it in header_macro_name. Be sure |
-| to produce valid CPP names (don't start with digit, remain |
-| alphanumerical + underscore). |
-`-----------------------------------------------------------------*/
-
-static char *
-compute_header_macro (void)
-{
- const char *prefix = "BISON_";
- char *macro_name, *cp;
-
- if (spec_defines_file)
- {
- macro_name = XMALLOC (char,
- strlen (prefix) +
- strlen (spec_defines_file) + 1);
- cp = stpcpy (macro_name, prefix);
- cp = stpcpy (cp, spec_defines_file);
- }
- else
- {
- macro_name = XMALLOC (char,
- strlen (prefix) +
- strlen (base_name) +
- strlen (header_extension) + 1);
- cp = stpcpy (macro_name, prefix);
- cp = stpcpy (cp, base_name);
- cp = stpcpy (cp, header_extension);
- }
-
- for (cp = macro_name; *cp; ++cp)
- if (islower (*cp))
- *cp = toupper (*cp);
- else if (!isalnum (*cp))
- *cp = '_';
-
- return macro_name;
-}
-
-
/*-----------------------------------------------------------------.
| Try to open file NAME with mode MODE, and print an error message |
| if fails. |
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;
-
- result = fclose (ptr);
- if (result == EOF)
- error (2, errno, _("cannot close file"));
-
- return result;
-}
+ return;
-/*--------------------------------------------------.
-| Save the content of the obstack OBS in FILENAME. |
-`--------------------------------------------------*/
+ if (ferror (ptr))
+ error (EXIT_FAILURE, 0, _("I/O error"));
-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);
+ if (fclose (ptr) != 0)
+ error (EXIT_FAILURE, get_errno (), _("cannot close file"));
}
+\f
/*---------------------------------------------------------------------.
-| Output double inclusion protection macros and saves defines_obstack |
+| Compute FULL_BASE_NAME, SHORT_BASE_NAME and output files extensions. |
`---------------------------------------------------------------------*/
-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_NAME. |
-`------------------------------------------------------------------*/
-
-const char *
-skeleton_find (const char *envvar, const char *skeleton_name)
-{
- const char *res = getenv (envvar);
-
-#if defined (MSDOS) || defined (_WIN32)
- if (!res)
- {
- /* Skeleton file name without path */
- const char *skel_name = strrchr (skeleton_name, '/');
- if (!skel_name)
- skel_name = strrchr (skeleton_name, '\\');
- if (!skel_name)
- skel_name = skeleton_name;
- else
- ++skel_name;
-
- /* File doesn't exist in current directory; try in INIT directory. */
- const char *cp = getenv ("INIT");
- if (cp)
- {
- res = XMALLOC (char, strlen (cp) + strlen (skel_name) + 2);
- sprintf (res, "%s%c%s", cp, '\\', skel_name);
- }
- else if (access (skel_name, 4) == 0) /* Look in current dir. */
- res = skel_name;
- else
- {
- /* Look in program locations dir. */
- extern char *program_name;
- cp = strrchr(program_name, '\\');
- if (!cp)
- return skeleton_name;
- else
- ++cp;
- res = XMALLOC (char, cp - program_name + strlen (skel_name) + 1);
- strncpy (res, program_name, cp - program_name);
- strcpy (res + (cp - program_name), skel_name);
- }
- }
-#endif /* defined (MSDOS) || defined (_WIN32) */
- if (!res)
- res = skeleton_name;
-
- return res;
-}
-\f
-
-/*----------------------------------------------------------------.
-| 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);
+ char *out = xmalloc (strlen (in) + 1);
for (temp = out; *in; in++, out++)
if (*in == from)
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. */
+/* Compute extensions from the grammar file extension. */
static void
compute_exts_from_gf (const char *ext)
{
header_extension = tr (header_extension, 'Y', 'H');
}
-/* Computes extensions from the given c source file extension. */
+/* Compute extensions from the given c source file extension. */
static void
compute_exts_from_src (const char *ext)
{
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 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;
+ }
+}
+
+
/* 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'.
+ FULL_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'.
+ If --output=foo.tab.c was specified, FULL_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)
{
-#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);
+ 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)));
+ }
- base_name = XMALLOC (char,
- strlen (short_base_name) + strlen (EXT_TAB) + 1);
- stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
+ full_base_name = xmalloc (strlen (short_base_name)
+ + strlen (TAB_EXT) + 1);
+ stpcpy (stpcpy (full_base_name, short_base_name), TAB_EXT);
- return;
- }
+ /* Compute 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, compute the output files names. |
-`-------------------------------------------------------*/
+
+/* Compute the output file names. Warn if we detect conflicting
+ outputs to the same file. */
void
compute_output_file_names (void)
{
+ char const *name[4];
+ int i;
+ int j;
+ int names = 0;
+
compute_base_names ();
/* If not yet done. */
if (!header_extension)
header_extension = ".h";
- /* It the defines filename if not given, we create it. */
- if (!spec_defines_file)
- spec_defines_file = stringappend (base_name, header_extension);
-
- /* It the graph filename if not given, we create it. */
- if (!spec_graph_file)
- spec_graph_file = stringappend (short_base_name, ".vcg");
-
- spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
-
- attrsfile = stringappend (short_base_name, EXT_STYPE_H);
-#ifndef MSDOS
- attrsfile = stringappend (attrsfile, header_extension);
-#endif /* MSDOS */
-
-}
-
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
-
-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);
-}
-
+ name[names++] = parser_file_name =
+ spec_outfile ? spec_outfile : concat2 (full_base_name, src_extension);
-
-/*-----------------------.
-| Close the open file.. |
-`-----------------------*/
-
-void
-close_files (void)
-{
- xfclose (finput);
-}
-
-/*---------------------------.
-| Produce the output files. |
-`---------------------------*/
-
-void
-output_files (void)
-{
- /* Output the main file. */
- if (spec_outfile)
- obstack_save (&table_obstack, spec_outfile);
- else
- obstack_save (&table_obstack, stringappend (base_name, src_extension));
- obstack_free (&table_obstack, NULL);
-
- /* Output the header file if wanted. */
if (defines_flag)
- defines_obstack_save (spec_defines_file);
- obstack_free (&defines_obstack, NULL);
-
-#if 0
- /* Seems to be invalid now --akim. */
+ {
+ if (! spec_defines_file)
+ spec_defines_file = concat2 (full_base_name, header_extension);
+ name[names++] = spec_defines_file;
+ }
- /* If we output only the table, dump the actions in ACTFILE. */
- if (no_parser_flag)
- obstack_save (&action_obstack, stringappend (short_base_name, ".act"));
- obstack_free (&action_obstack, NULL);
-#endif
+ if (graph_flag)
+ {
+ if (! spec_graph_file)
+ spec_graph_file = concat2 (short_base_name, ".vcg");
+ name[names++] = spec_graph_file;
+ }
- /* If we produced a semantic parser ATTRS_OBSTACK must be dumped
- into its own file, ATTTRSFILE. */
- if (semantic_parser)
+ if (report_flag)
{
- char *temp_name;
-
- obstack_save (&attrs_obstack, attrsfile);
- obstack_free (&attrs_obstack, NULL);
- 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);
- obstack_free (&guard_obstack, NULL);
+ spec_verbose_file = concat2 (short_base_name, OUTPUT_EXT);
+ name[names++] = spec_verbose_file;
}
+
+ for (j = 0; j < names; j++)
+ for (i = 0; i < j; i++)
+ if (strcmp (name[i], name[j]) == 0)
+ warn (_("conflicting outputs to file %s"), quote (name[i]));
}
projects / bison.git / blobdiff