X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ea52d7066d461da102602b25d371dd09e82eb371..616429b50868bf9225d55143526442a024e32969:/src/files.c?ds=sidebyside diff --git a/src/files.c b/src/files.c index dc6eb1e6..22f29c1e 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, 2001 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. @@ -26,17 +27,25 @@ #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)); + FILE *finput = NULL; struct obstack action_obstack; struct obstack attrs_obstack; -struct obstack defines_obstack; -struct obstack guard_obstack; struct obstack output_obstack; +/* Initializing some values below (such SPEC_NAME_PREFIX to `yy') is + tempting, but don't do that: for the time being our handling of the + %directive vs --option leaves precedence to the options by deciding + that if a %directive sets a variable which is really set (i.e., not + NULL), then the %directive is ignored. As a result, %name-prefix, + for instance, will not be honored. */ + char *spec_outfile = NULL; /* for -o. */ char *spec_file_prefix = NULL; /* for -b. */ -const char *spec_name_prefix = "yy"; /* for -p. */ +const 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. */ @@ -45,8 +54,14 @@ char *parser_file_name = NULL; char *infile = NULL; char *attrsfile = NULL; -static char *base_name = NULL; -static char *short_base_name = NULL; +static char *full_base_name = NULL; + +/* Prefix used to generate output file names. */ +char *short_base_name = NULL; + +/* Infix used to generate output file names (i.e., `.tab', or `_tab', + or `'). */ +char *output_infix = NULL; /* C source file extension (the parser source). */ const char *src_extension = NULL; @@ -58,7 +73,7 @@ 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); @@ -75,7 +90,7 @@ strsuffix (const char *string, const char *suffix) | STRING1, and STRING2. | `-----------------------------------------------------------------*/ -static char * +char* stringappend (const char *string1, const char *string2) { size_t len = strlen (string1) + strlen (string2); @@ -94,7 +109,7 @@ stringappend (const char *string1, const char *string2) | alphanumerical + underscore). | `-----------------------------------------------------------------*/ -static char * +char * compute_header_macro (void) { const char *prefix = "BISON_"; @@ -112,10 +127,10 @@ compute_header_macro (void) { macro_name = XMALLOC (char, strlen (prefix) + - strlen (base_name) + + strlen (full_base_name) + strlen (header_extension) + 1); cp = stpcpy (macro_name, prefix); - cp = stpcpy (cp, base_name); + cp = stpcpy (cp, full_base_name); cp = stpcpy (cp, header_extension); } @@ -165,38 +180,6 @@ 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 | @@ -209,6 +192,7 @@ skeleton_find (const char *envvar, const char *skeleton_name) const char *res = getenv (envvar); #if defined (MSDOS) || defined (_WIN32) + const char *cp = getenv ("INIT"); if (!res) { /* Skeleton file name without path */ @@ -221,7 +205,6 @@ skeleton_find (const char *envvar, const char *skeleton_name) ++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); @@ -274,27 +257,6 @@ 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) -{ - 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) @@ -317,14 +279,61 @@ compute_exts_from_src (const char *ext) 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; - size_t ext_index; + const char *base, *tab, *ext; /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c), BASE_NAME and SHORT_BASE_NAME are `foo'. @@ -336,92 +345,67 @@ 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); - - 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); - } + filename_split (spec_outfile, &base, &tab, &ext); - 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); + /* The full base name goes up the EXT, excluding it. */ + full_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); - return; - } + /* 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 --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME - are `foo'. + if (tab) + output_infix = xstrndup (tab, + (strlen (tab) - (ext ? strlen (ext) : 0))); - Construct names from it. */ - if (spec_file_prefix) - { -#ifdef MSDOS - 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; + if (ext) + compute_exts_from_src (ext); } - /* 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'. - - 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 BASE_NAME, sans ".y" suffix if any. */ + /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab' + and SHORT_BASE_NAME = `foo'. - 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 (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); - } + Construct names from it. */ + else + { + 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))); + } - short_base_length = base_length; - short_base_name = strndup (name_base, short_base_length); + /* In these cases, always append `.tab'. */ + output_infix = xstrdup (EXT_TAB); - base_name = XMALLOC (char, - strlen (short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); + full_base_name = XMALLOC (char, + strlen (short_base_name) + + strlen (EXT_TAB) + 1); + stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB); - return; - } + /* Computes the extensions from the grammar file name. */ + filename_split (infile, &base, &tab, &ext); + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } } /*-------------------------------------------------------. @@ -433,18 +417,18 @@ compute_output_file_names (void) { compute_base_names (); - parser_file_name = - spec_outfile ? spec_outfile : stringappend (base_name, src_extension); - /* If not yet done. */ if (!src_extension) src_extension = ".c"; if (!header_extension) header_extension = ".h"; - + + parser_file_name = + spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension); + /* It the defines filename if not given, we create it. */ if (!spec_defines_file) - spec_defines_file = stringappend (base_name, header_extension); + spec_defines_file = stringappend (full_base_name, header_extension); /* It the graph filename if not given, we create it. */ if (!spec_graph_file) @@ -453,75 +437,4 @@ compute_output_file_names (void) 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 (&defines_obstack); - obstack_init (&guard_obstack); - obstack_init (&output_obstack); -} - - - -/*-----------------------. -| Close the open file.. | -`-----------------------*/ - -void -close_files (void) -{ - xfclose (finput); -} - -/*---------------------------. -| Produce the output files. | -`---------------------------*/ - -void -output_files (void) -{ - /* Output the header file if wanted. */ - if (defines_flag) - defines_obstack_save (spec_defines_file); - obstack_free (&defines_obstack, NULL); - -#if 0 - /* Seems to be invalid now --akim. */ - - /* 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); -#endif - - /* 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_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); - } }