X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/234a3be30308bdf67bda1fe67fce08f3cc55e749..dda680cb8069f3e383cbc3c140ea59f35bd2c75c:/src/files.c diff --git a/src/files.c b/src/files.c index 8ecb1f9f..6bf301f9 100644 --- a/src/files.c +++ b/src/files.c @@ -1,5 +1,5 @@ /* 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. @@ -34,23 +34,24 @@ struct obstack table_obstack; struct obstack defines_obstack; struct obstack guard_obstack; struct obstack output_obstack; +struct obstack graph_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 *infile; -char *attrsfile; +char *infile = NULL; +char *attrsfile = NULL; -static char *base_name; -static char *short_base_name; - -/* C source file extension (the parser source). */ -static char *src_extension; -/* Header file extension (if option ``-d'' is specified). */ -static char *header_extension; +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; + /*--------------------------. | Is SUFFIX ending STRING? | `--------------------------*/ @@ -83,6 +84,37 @@ 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. | +`---------------------------------------------------------------*/ + +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. | @@ -132,14 +164,33 @@ 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); @@ -149,30 +200,30 @@ skeleton_find (const char *envvar, const char *skeleton) /* 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; } - + /*----------------------------------------------------------------. | 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. */ +/* 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) +tr (const char *in, char from, char to) { char *temp; char *out; - + out = XMALLOC (char, strlen (in) + 1); for (temp = out; *in; in++, out++) @@ -184,15 +235,15 @@ tr(const char *in, char from, char to) return (temp); } -/* Gets the extension index in FILENAME. Returns 0 if fails to - find an extension. */ -static int -get_extension_index(const char *filename) +/* Gets the extension index in FILENAME. Returns 0 if fails to + find an extension. */ +static int +get_extension_index (const char *filename) { - int len; + int len; len = strlen (filename); - + if (filename[len-- - 1] == '.') return (0); @@ -207,21 +258,34 @@ get_extension_index(const char *filename) /* Computes extensions from the grammar file extension. */ static void -compute_exts_from_gf(const char *ext) +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'); + /* 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) +compute_exts_from_src (const char *ext) { - src_extension = xstrdup(ext); - header_extension = tr(ext, 'c', 'h'); - header_extension = tr(header_extension, 'C', 'H'); + /* 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. */ @@ -232,10 +296,6 @@ compute_base_names (void) size_t base_length; size_t short_base_length; size_t ext_index; - - /* Set default extensions */ - src_extension = ".c"; - header_extension = ".h"; /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c), BASE_NAME and SHORT_BASE_NAME are `foo'. @@ -252,18 +312,19 @@ compute_base_names (void) #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 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; + 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); + 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; @@ -288,6 +349,15 @@ compute_base_names (void) 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; } @@ -302,16 +372,16 @@ compute_base_names (void) /* 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 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; + 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); + compute_exts_from_gf (name_base + ext_index); } short_base_length = base_length; @@ -342,6 +412,7 @@ open_files (void) obstack_init (&defines_obstack); obstack_init (&guard_obstack); obstack_init (&output_obstack); + obstack_init (&graph_obstack); } @@ -357,20 +428,26 @@ output_files (void) 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 */ +#endif /* MSDOS */ /* Output the main file. */ if (spec_outfile) obstack_save (&table_obstack, spec_outfile); else - obstack_save (&table_obstack, stringappend (base_name, src_extension)); + obstack_save (&table_obstack, stringappend (base_name, src_extension)); /* Output the header file if wanted. */ if (defines_flag) - obstack_save (&defines_obstack, stringappend (base_name, header_extension)); + defines_obstack_save (stringappend (base_name, header_extension)); /* If we output only the table, dump the actions in ACTFILE. */ if (no_parser_flag) @@ -393,5 +470,9 @@ output_files (void) 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)); + obstack_save (&output_obstack, + stringappend (short_base_name, EXT_OUTPUT)); + + if (graph_flag) + obstack_save (&graph_obstack, stringappend (short_base_name, ".vcg")); }