X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/358c15b71e6413799dc4c98a3cc8d64a4707a503..4134cae3c5ff2fc3346ebc5b10d5c25c72c72cfe:/src/files.c?ds=sidebyside diff --git a/src/files.c b/src/files.c index d4e78132..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. @@ -20,25 +20,6 @@ #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" @@ -46,65 +27,100 @@ #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; + +/*--------------------------. +| 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; @@ -120,7 +136,7 @@ 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; @@ -148,9 +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_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); @@ -160,145 +200,223 @@ 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; } - -/*-----------------------------------------------------------------. -| 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. | `-----------------------------------------------------*/ @@ -306,25 +424,55 @@ open_extra_files (void) 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")); }