X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/896fe5c10a4b4b434afb37b9de106b23d42a09f4..9887c18aca3cedcf003ffb150af5f597f4bf3956:/src/files.c diff --git a/src/files.c b/src/files.c index 7e0b24a4..d8641521 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. @@ -20,93 +20,121 @@ #include "system.h" - -#if defined (VMS) & !defined (__VMS_POSIX) -# include -# define unlink delete -# ifndef XPFILE -# define XPFILE "GNU_BISON:[000000]BISON.SIMPLE" -# endif -# ifndef XPFILE1 -# define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY" -# endif -#endif - -#if defined (_MSC_VER) -# ifndef XPFILE -# define XPFILE "c:/usr/local/lib/bison.simple" -# endif -# ifndef XPFILE1 -# define XPFILE1 "c:/usr/local/lib/bison.hairy" -# endif -#endif - #include "getargs.h" #include "files.h" -#include "xalloc.h" #include "gram.h" +#include "error.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; + +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 = NULL; +char *attrsfile = NULL; + +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; + -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; - -char *infile; -char *attrsfile; +/*--------------------------. +| Is SUFFIX ending STRING? | +`--------------------------*/ -static char *outfile; -static char *defsfile; -static char *tabfile; -static char *guardfile; -static char *actfile; +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; +} -extern char *getenv (); -extern char *program_name; - +/*-----------------------------------------------------------------. +| Return a newly allocated string composed of the concatenation of | +| STRING1, and STRING2. | +`-----------------------------------------------------------------*/ static char * -stringappend (const char *string1, int end1, const char *string2) +stringappend (const char *string1, const char *string2) { - register char *ostring; - register char *cp; - register const char *cp1; - register int i; + size_t len = strlen (string1) + strlen (string2); + char *res = XMALLOC (char, len + 1); + char *cp; + cp = stpcpy (res, string1); + cp = stpcpy (cp, string2); + return res; +} - cp1 = string2; - i = 0; - while (*cp1++) - i++; - ostring = XCALLOC (char, i + end1 + 1); +/*-----------------------------------------------------------------. +| 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). | +`-----------------------------------------------------------------*/ - cp = ostring; - cp1 = string1; - for (i = 0; i < end1; i++) - *cp++ = *cp1++; +static char * +compute_header_macro (void) +{ + const char *prefix = "BISON_"; + char *macro_name, *cp; - cp1 = string2; - while ((*cp++ = *cp1++)) - ; + 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 ostring; + 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; @@ -122,7 +150,7 @@ xfopen (const char *name, const char *mode) | Try to close file PTR, and print an error message if fails. | `-------------------------------------------------------------*/ -static int +int xfclose (FILE *ptr) { int result; @@ -136,275 +164,370 @@ xfclose (FILE *ptr) return result; } + +/*--------------------------------------------------. +| Save the content of the obstack OBS in FILENAME. | +`--------------------------------------------------*/ + +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); +} + +/*---------------------------------------------------------------------. +| 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. | +`------------------------------------------------------------------*/ + +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; +} -/* JF this has been hacked to death. Nowaday it sets up the file names for - the output files, and opens the tmp files and the parser */ -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 - char *filename; - int base_length; - int short_base_length; - -#if defined (VMS) & !defined (__VMS_POSIX) - const char *tmp_base = "sys$scratch:b_"; -#else - const char *tmp_base = "/tmp/b."; -#endif - int tmp_len; + 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); +} -#ifdef MSDOS - tmp_base = getenv ("TMP"); - if (tmp_base == 0) - tmp_base = ""; - strlwr (infile); -#endif /* MSDOS */ +/* Gets the extension index in FILENAME. Returns 0 if fails to + find an extension. */ +static int +get_extension_index (const char *filename) +{ + int len; -#if (defined(_WIN32) && !defined(__CYGWIN32__)) - tmp_base = getenv ("TEMP"); /* Windows95 defines this ... */ - if (tmp_base == 0) - tmp_base = getenv ("Temp"); /* ... while NT prefers this */ - if (tmp_base == 0) - tmp_base = ""; - strlwr (infile); -#endif /* _WIN32 && !__CYGWIN32__ */ + len = strlen (filename); -#if (defined(unix) || defined(__unix) || defined(__unix__) || defined(__EMX__)) - { - char *tmp_ptr = getenv ("TMPDIR"); + if (filename[len-- - 1] == '.') + return (0); - if (tmp_ptr != 0) - tmp_base = stringappend (tmp_ptr, strlen (tmp_ptr), "/b."); - } -#endif /* unix || __unix || __unix__ */ + 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) +{ + 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'); +} + +/* FIXME: Should use xstrndup. */ - tmp_len = strlen (tmp_base); +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); -#ifdef VMS - strcat (name_base, "_tab"); -#else - strcat (name_base, ".tab"); -#endif #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"; + /* 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'. - name_base = yacc_flag ? FIXED_NAME_BASE : infile; + 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 NAME_BASE, sans ".y" suffix if any. */ + /* BASE_LENGTH gets length of BASE_NAME, sans ".y" suffix if any. */ - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".y")) - base_length -= 2; - short_base_length = base_length; + base_length = strlen (name_base); -#ifdef VMS - name_base = stringappend (name_base, short_base_length, "_tab"); -#else -#ifdef MSDOS - name_base = stringappend (name_base, short_base_length, "_tab"); -#else - name_base = stringappend (name_base, short_base_length, ".tab"); -#endif /* not MSDOS */ -#endif - base_length = short_base_length + 4; - } + 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); + } - finput = xfopen (infile, "r"); + short_base_length = base_length; + short_base_name = strndup (name_base, short_base_length); - if (!no_parser_flag) - { - filename = getenv ("BISON_SIMPLE"); -#ifdef MSDOS - /* File doesn't exist in current directory; try in INIT directory. */ - cp = getenv ("INIT"); - if (filename == 0 && cp != NULL) - { - filename = XMALLOC (char, strlen (cp) + strlen (PFILE) + 2); - strcpy (filename, cp); - cp = filename + strlen (filename); - *cp++ = '/'; - strcpy (cp, PFILE); - } -#endif /* MSDOS */ - fparser = xfopen (filename ? filename : PFILE, "r"); - } + base_name = XMALLOC (char, + strlen (short_base_name) + strlen (EXT_TAB) + 1); + stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); - if (verbose_flag) - { -#ifdef MSDOS - outfile = stringappend (name_base, short_base_length, ".out"); -#else - /* 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, ".output"); -#endif - foutput = xfopen (outfile, "w"); - } + return; + } +} - if (no_parser_flag) - { - /* use permanent name for actions file */ - actfile = stringappend (name_base, short_base_length, ".act"); - } +/*-------------------------------------------------------. +| Close the open files, compute the output files names. | +`-------------------------------------------------------*/ - if (defines_flag) - { - defsfile = stringappend (name_base, base_length, ".h"); - } +void +compute_output_file_names (void) +{ + compute_base_names (); - /* 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"); + /* If not yet done. */ + if (!src_extension) + src_extension = ".c"; + if (!header_extension) + header_extension = ".h"; -#ifdef VMS - attrsfile = stringappend (name_base, short_base_length, "_stype.h"); - guardfile = stringappend (name_base, short_base_length, "_guard.c"); -#else -#ifdef MSDOS - attrsfile = stringappend (name_base, short_base_length, ".sth"); - guardfile = stringappend (name_base, short_base_length, ".guc"); -#else - attrsfile = stringappend (name_base, short_base_length, ".stype.h"); - guardfile = stringappend (name_base, short_base_length, ".guard.c"); -#endif /* not MSDOS */ -#endif /* not VMS */ + /* 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); } -/*--------------------------------------------------------------------. -| 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 file.. | +`-----------------------*/ void -open_extra_files (void) +close_files (void) { - int c; - char *filename; - - xfclose (fparser); - - if (!no_parser_flag) - { - filename = (char *) getenv ("BISON_HAIRY"); -#ifdef MSDOS - { - /* File doesn't exist in current directory; try in INIT - directory. */ - char *cp = getenv ("INIT"); - if (filename == 0 && cp != NULL) - { - filename = XMALLOC (char, strlen (cp) + strlen (PFILE1) + 2); - strcpy (filename, cp); - cp = filename + strlen (filename); - *cp++ = '/'; - strcpy (cp, PFILE1); - } - } -#endif - fparser = xfopen (filename ? filename : PFILE1, "r"); - } - - fguard = xfopen (guardfile, "w"); + xfclose (finput); } +/*---------------------------. +| Produce the output files. | +`---------------------------*/ + void -done (void) +output_files (void) { - xfclose (fguard); - xfclose (finput); - xfclose (fparser); - xfclose (foutput); + /* 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); - /* JF write out the output file */ - if (!complain_message_count) - { - /* Output the main file. */ - FILE *ftab = xfopen (tabfile, "w"); - size_t size = obstack_object_size (&table_obstack); - fwrite (obstack_finish (&table_obstack), 1, size, ftab); - xfclose (ftab); - - /* Output the header file is wanted. */ - if (defines_flag) - { - FILE *fdefs = xfopen (defsfile, "w"); - size_t size = obstack_object_size (&defines_obstack); - fwrite (obstack_finish (&defines_obstack), 1, size, fdefs); - xfclose (fdefs); - } - } + /* Output the header file if wanted. */ + if (defines_flag) + defines_obstack_save (spec_defines_file); + obstack_free (&defines_obstack, NULL); - /* If we output only the table, dump the actions in ACTION_OBSTACK. - */ +#if 0 + /* Seems to be invalid now --akim. */ + + /* If we output only the table, dump the actions in ACTFILE. */ if (no_parser_flag) - { - FILE *faction = xfopen (actfile, "w"); - size_t size = obstack_object_size (&action_obstack); - fwrite (obstack_finish (&action_obstack), 1, size, faction); - xfclose (faction); - } + obstack_save (&action_obstack, stringappend (short_base_name, ".act")); + obstack_free (&action_obstack, NULL); +#endif /* If we produced a semantic parser ATTRS_OBSTACK must be dumped into its own file, ATTTRSFILE. */ if (semantic_parser) { - FILE *fattrs = xfopen (attrsfile, "w"); - size_t size = obstack_object_size (&attrs_obstack); - fwrite (obstack_finish (&attrs_obstack), 1, size, fattrs); - xfclose (fattrs); - } + char *temp_name; -/* Don't call exit again, we're in atexit (). - exit (complain_message_count ? 1 : 0); */ + 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); + } }