X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9b3add5bebc553f9bc1a10a9a6a489135f2a9d4d..616429b50868bf9225d55143526442a024e32969:/src/files.c diff --git a/src/files.c b/src/files.c index 2e817b1e..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. @@ -26,6 +27,9 @@ #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; @@ -50,16 +54,19 @@ char *parser_file_name = NULL; char *infile = NULL; char *attrsfile = NULL; -static char *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; /* Header file extension (if option ``-d'' is specified). */ const char *header_extension = NULL; - -/* Should we insert '.tab' in yacc-compatible parsers? */ -int tab_extension = 0; /*--------------------------. @@ -120,10 +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); } @@ -185,6 +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 */ @@ -197,7 +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); @@ -250,27 +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) @@ -293,14 +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'. @@ -312,104 +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); + + /* The full base name goes up the EXT, excluding it. */ + full_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); - 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 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)))); - /* FIXME: This is a quick and dirty way for me to find out if we - should .tab or not, using the computations above. */ - if (strcmp (base_name, short_base_name)) - tab_extension = 1; + if (tab) + output_infix = xstrndup (tab, + (strlen (tab) - (ext ? strlen (ext) : 0))); - return; + if (ext) + compute_exts_from_src (ext); } - /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME - are `foo'. + /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab' + and SHORT_BASE_NAME = `foo'. Construct names from it. */ - if (spec_file_prefix) + else { -#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); - - /* It seems that when only a prefix is given, '.tab' should always be - used. */ - tab_extension = 1; - - return; - } - - /* 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. */ - - 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); - } - - short_base_length = base_length; - short_base_name = strndup (name_base, short_base_length); + 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))); + } - base_name = XMALLOC (char, - strlen (short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); + /* In these cases, always append `.tab'. */ + output_infix = xstrdup (EXT_TAB); - /* By default, Bison should insert '.tab' were needed. */ - tab_extension = 1; + 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); + } } /*-------------------------------------------------------. @@ -421,18 +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) @@ -441,7 +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 */ }