X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/6deb44470e47bb02f0ca3ea630408d013e128710..1710ea3d30e5ba1b4ff03374a4a10f21e45fdcdd:/src/files.c

diff --git a/src/files.c b/src/files.c
index eefa188d..c11420c8 100644
--- a/src/files.c
+++ b/src/files.c
@@ -1,5 +1,6 @@
 /* Open and close files for bison,
-   Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.
+   Copyright 1984, 1986, 1989, 1992, 2000, 2001, 2002
+   Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -22,10 +23,15 @@
 #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 PARAMS ((char const *name));
+/* From xstrndup.c.  */
+char *xstrndup PARAMS ((const char *s, size_t n));
+
 FILE *finput = NULL;
 
 struct obstack action_obstack;
@@ -35,22 +41,30 @@ struct obstack defines_obstack;
 struct obstack guard_obstack;
 struct obstack output_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 *spec_verbose_file = NULL;   /* for --verbose. */
+char *spec_graph_file = NULL;   /* for -g. */
+char *spec_defines_file = NULL; /* for --defines. */
 
-char *infile;
-char *attrsfile;
+char *infile = NULL;
+char *attrsfile = NULL;
 
-static char *base_name;
-static char *short_base_name;
+static char *full_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;
 
+
 /*--------------------------.
 | Is SUFFIX ending STRING?  |
 `--------------------------*/
 
-static int
+int
 strsuffix (const char *string, const char *suffix)
 {
   size_t string_len = strlen (string);
@@ -78,6 +92,49 @@ stringappend (const char *string1, const char *string2)
   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 (full_base_name) +
+			    strlen (header_extension) + 1);
+      cp = stpcpy (macro_name, prefix);
+      cp = stpcpy (cp, full_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.                                                        |
@@ -127,46 +184,179 @@ obstack_save (struct obstack *obs, const char *filename)
   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);
 
-#ifdef MSDOS
-  const char *cp;
-
-  /* File doesn't exist in current directory; try in INIT directory.  */
-  if (!res && (cp = getenv ("INIT")))
+#if defined (MSDOS) || defined (_WIN32)
+  if (!res)
     {
-      res = XMALLOC (char, strlen (cp) + strlen (skeleton) + 2);
-      sprintf (res, "%s%c%s", cp, '/', skeleton);
+      /* 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 /* !MSDOS */
-
+#endif /* defined (MSDOS) || defined (_WIN32) */
   if (!res)
-    res = skeleton;
+    res = skeleton_name;
 
   return res;
 }
-
 
-/*----------------------------------------.
-| 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);
+}
+
+/* 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');
+}
+
+/* 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'
+
+   '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;
+  const char *base, *tab, *ext;
 
   /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c),
      BASE_NAME and SHORT_BASE_NAME are `foo'.
@@ -178,63 +368,93 @@ compute_base_names (void)
      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);
+
+      /* The full base name goes up the EXT, excluding it. */
+      full_base_name =
+ 	xstrndup (spec_outfile,
+ 		  (strlen (spec_outfile) - (ext ? strlen (ext) : 0)));
+      /* 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);
+      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.yy' => `foo'.  */
+ 	  filename_split (infile, &base, &tab, &ext);
+ 	  short_base_name =
+ 	    xstrndup (infile,
+ 		      (strlen (infile) - (ext ? strlen (ext) : 0)));
+ 	}
+
+      /* In these cases, always append `.tab'. */
+      full_base_name = XMALLOC (char,
+ 				strlen (short_base_name)
+ 				+ strlen (EXT_TAB) + 1);
+      stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB);
+
+      /* Computes the extensions from the grammar file name.  */
+      filename_split (infile, &base, &tab, &ext);
+      if (ext)
+ 	compute_exts_from_gf (ext);
+    }
+}
 
-      base_name = XMALLOC (char,
-			   strlen (short_base_name) + strlen (EXT_TAB) + 1);
-      stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
 
-      return;
-    }
+/*-------------------------------------------------------.
+| Close the open files, compute the output files names.  |
+`-------------------------------------------------------*/
 
-  /* 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'.
+void
+compute_output_file_names (void)
+{
+  compute_base_names ();
+
+  /* If not yet done. */
+  if (!src_extension)
+    src_extension = ".c";
+  if (!header_extension)
+    header_extension = ".h";
 
-     If --yacc is used, do as if the input file was `y.y'.  */
-  {
-    const char *name_base = yacc_flag ? "y.y" : infile;
+  /* It the defines filename if not given, we create it.  */
+  if (!spec_defines_file)
+    spec_defines_file = stringappend (full_base_name, header_extension);
 
-    /* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any.  */
+  /* It the graph filename if not given, we create it.  */
+  if (!spec_graph_file)
+    spec_graph_file = stringappend (short_base_name, ".vcg");
 
-    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);
+  spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT);
 
-    base_name = XMALLOC (char,
-			 strlen (short_base_name) + strlen (EXT_TAB) + 1);
-    stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
+  attrsfile = stringappend (short_base_name, EXT_STYPE_H);
+#ifndef MSDOS
+  attrsfile = stringappend (attrsfile, header_extension);
+#endif /* MSDOS */
 
-    return;
-  }
 }
 
 /*-----------------------------------------------------------------.
@@ -258,43 +478,54 @@ open_files (void)
 
 
 
-/*-----------------------------------------------------.
-| Close the open files, produce all the output files.  |
-`-----------------------------------------------------*/
+/*-----------------------.
+| Close the open file..  |
+`-----------------------*/
 
 void
-output_files (void)
+close_files (void)
 {
   xfclose (finput);
+}
 
-  compute_base_names ();
-  attrsfile = stringappend (short_base_name, EXT_STYPE_H);
+/*---------------------------.
+| 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, ".c"));
+    obstack_save (&table_obstack,
+		  stringappend (full_base_name, src_extension));
+  obstack_free (&table_obstack, NULL);
 
   /* Output the header file if wanted. */
   if (defines_flag)
-    obstack_save (&defines_obstack, stringappend (base_name, ".h"));
+    defines_obstack_save (spec_defines_file);
+  obstack_free (&defines_obstack, NULL);
 
   /* 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);
 
   /* 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);
-      obstack_save (&guard_obstack,
-		    stringappend (short_base_name, EXT_GUARD_C));
+      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);
     }
-
-  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));
 }