/* 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.
#include "system.h"
-
-#if defined (VMS) & !defined (__VMS_POSIX)
-# ifndef BISON_SIMPLE
-# define BISON_SIMPLE "GNU_BISON:[000000]BISON.SIMPLE"
-# endif
-# ifndef BISON_HAIRY
-# define BISON_HARIRY "GNU_BISON:[000000]BISON.HAIRY"
-# endif
-#endif
-
-#if defined (_MSC_VER)
-# ifndef BISON_SIMPLE
-# define BISON_SIMPLE "c:/usr/local/lib/bison.simple"
-# endif
-# ifndef BISON_HAIRY
-# define BISON_HAIRY "c:/usr/local/lib/bison.hairy"
-# endif
-#endif
-
#include "getargs.h"
#include "files.h"
#include "xalloc.h"
#include "complain.h"
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;
+struct obstack guard_obstack;
+struct obstack output_obstack;
+struct obstack graph_obstack;
-/* File name specified with -o for the output file, or 0 if no -o. */
-char *spec_outfile;
+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 *outfile;
-static char *defsfile;
-static char *tabfile;
-static char *guardfile;
-static char *actfile;
+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? |
+`--------------------------*/
+
+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 |
-| the END1 first chars of STRING1, and STRING2. |
+| STRING1, and STRING2. |
`-----------------------------------------------------------------*/
static char *
-stringappend (const char *string1, int end1, const char *string2)
+stringappend (const char *string1, const char *string2)
{
- char *res;
+ size_t len = strlen (string1) + strlen (string2);
+ char *res = XMALLOC (char, len + 1);
char *cp;
- const char *cp1;
- int i;
-
- cp1 = string2;
- i = 0;
- while (*cp1++)
- i++;
-
- res = XCALLOC (char, i + end1 + 1);
+ cp = stpcpy (res, string1);
+ cp = stpcpy (cp, string2);
+ return res;
+}
- cp = res;
- cp1 = string1;
- for (i = 0; i < end1; i++)
- *cp++ = *cp1++;
- cp1 = string2;
- while ((*cp++ = *cp1++))
- ;
+/*---------------------------------------------------------------.
+| Computes the macro name used to avoid double inclusion in the |
+| header of the parser and store it in header_macro_name. |
+`---------------------------------------------------------------*/
- return res;
+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. |
`-----------------------------------------------------------------*/
-static FILE *
+FILE *
xfopen (const char *name, const char *mode)
{
FILE *ptr;
| Try to close file PTR, and print an error message if fails. |
`-------------------------------------------------------------*/
-static int
+int
xfclose (FILE *ptr)
{
int result;
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_NAME. |
+`------------------------------------------------------------------*/
-static const char *
-skeleton_find (const char *envvar, const char *skeleton)
+const char *
+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
-/*-----------------------------------------------------------------.
-| Open the input file. Look for the skeletons. Find the names of |
-| the output files. Prepare the obstacks. |
-`-----------------------------------------------------------------*/
-void
-open_files (void)
+/*----------------------------------------------------------------.
+| 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 *name_base;
-#ifdef MSDOS
- register char *cp;
-#endif
- int base_length;
- int short_base_length;
+ 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. */
+
+static void
+compute_base_names (void)
+{
+ 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'.
+
+ 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)
{
- /* -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);
+ strlwr (spec_outfile);
#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;
+ 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);
+ }
+
+ base_name = strndup (spec_outfile, base_length);
/* 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))
+ if (strsuffix (base_name, ".tab") || strsuffix (base_name, "_tab"))
short_base_length -= 4;
+ short_base_name = strndup (spec_outfile, short_base_length);
+
+ return;
}
- else if (spec_file_prefix)
+
+ /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME
+ are `foo'.
+
+ Construct names from it. */
+ 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);
+ 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;
}
- else
- {
- /* -o was not specified; compute output file name from input
- or use y.tab.c, etc., if -y was specified. */
-
- static char FIXED_NAME_BASE[] = "y.y";
- name_base = yacc_flag ? FIXED_NAME_BASE : infile;
+ /* 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'.
- /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */
+ If --yacc is used, do as if the input file was `y.y'. */
+ {
+ const char *name_base = yacc_flag ? "y.y" : infile;
- base_length = strlen (name_base);
- if (!strcmp (name_base + base_length - 2, ".y"))
- base_length -= 2;
- short_base_length = base_length;
+ /* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any. */
- name_base = stringappend (name_base, short_base_length, EXT_TAB);
- base_length = short_base_length + 4;
- }
+ base_length = strlen (name_base);
- finput = xfopen (infile, "r");
+ 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);
+ }
- if (!no_parser_flag)
- fparser = xfopen (skeleton_find ("BISON_SIMPLE", BISON_SIMPLE), "r");
+ short_base_length = base_length;
+ short_base_name = strndup (name_base, short_base_length);
- if (verbose_flag)
- {
- /* 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");
- }
+ base_name = XMALLOC (char,
+ strlen (short_base_name) + strlen (EXT_TAB) + 1);
+ stpcpy (stpcpy (base_name, short_base_name), EXT_TAB);
- 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");
- }
+ return;
+ }
+}
- /* These are opened by `done' or `open_extra_files', if at all */
- if (spec_outfile)
- tabfile = spec_outfile;
- else
- tabfile = stringappend (name_base, base_length, ".c");
+/*-----------------------------------------------------------------.
+| Open the input file. Look for the skeletons. Find the names of |
+| the output files. Prepare the obstacks. |
+`-----------------------------------------------------------------*/
- attrsfile = stringappend (name_base, short_base_length, EXT_STYPE_H);
- guardfile = stringappend (name_base, short_base_length, EXT_GUARD_C);
+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);
+ obstack_init (&graph_obstack);
}
-/*--------------------------------------------------------------------.
-| Open the output files needed only for the semantic parser. This |
-| is done when %semantic_parser is seen in the declarations section. |
-`--------------------------------------------------------------------*/
-
-void
-open_extra_files (void)
-{
- xfclose (fparser);
-
- if (!no_parser_flag)
- fparser = xfopen (skeleton_find ("BISON_HAIRY", BISON_HAIRY), "r");
- fguard = xfopen (guardfile, "w");
-}
-
-
/*-----------------------------------------------------.
| Close the open files, produce all the output files. |
`-----------------------------------------------------*/
void
output_files (void)
{
- xfclose (fguard);
xfclose (finput);
- xfclose (fparser);
- xfclose (foutput);
+
+ 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. */
- obstack_save (&table_obstack, tabfile);
+ if (spec_outfile)
+ obstack_save (&table_obstack, spec_outfile);
+ else
+ obstack_save (&table_obstack, stringappend (base_name, src_extension));
/* Output the header file if wanted. */
if (defines_flag)
- obstack_save (&defines_obstack, defsfile);
+ defines_obstack_save (stringappend (base_name, header_extension));
- /* If we output only the table, dump the actions in ACTFILE.
- */
+ /* If we output only the table, dump the actions in ACTFILE. */
if (no_parser_flag)
- obstack_save (&action_obstack, actfile);
+ 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);
+ {
+ char *temp_name;
+
+ obstack_save (&attrs_obstack, attrsfile);
+ 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));
+
+ if (graph_flag)
+ obstack_save (&graph_obstack, stringappend (short_base_name, ".vcg"));
}
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