X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/19c50364f38b72dcd7bf67a998db3c815b7b6a94..901ec1537a0ceb980398a5395751ea0e445c4ce5:/src/files.c diff --git a/src/files.c b/src/files.c index 32a4a8d5..92573585 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 Free Software Foundation, Inc. + Copyright (C) 1984, 1986, 1989, 1992, 2000, 2001, 2002 + Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -22,36 +23,55 @@ #include "system.h" #include "getargs.h" #include "files.h" -#include "xalloc.h" #include "gram.h" +#include "error.h" #include "complain.h" +/* From basename.c. Almost a lie, as it returns a char *. */ +const char *base_name (char const *name); + FILE *finput = NULL; -FILE *foutput = NULL; -FILE *fguard = NULL; -struct obstack action_obstack; -struct obstack attrs_obstack; -struct obstack table_obstack; -struct obstack defines_obstack; +struct obstack pre_prologue_obstack; +struct obstack post_prologue_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 = 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 *parser_file_name = NULL; + +char *infile = NULL; -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; +static char *full_base_name = NULL; -char *infile; -char *attrsfile; -char *guardfile; +/* Prefix used to generate output file names. */ +char *short_base_name = NULL; -static char *outfile; -static char *defsfile; -static char *tabfile; -static char *actfile; +/* 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; + /*--------------------------. | Is SUFFIX ending STRING? | `--------------------------*/ -static int +int strsuffix (const char *string, const char *suffix) { size_t string_len = strlen (string); @@ -68,7 +88,7 @@ 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); @@ -91,7 +111,7 @@ xfopen (const char *name, const char *mode) ptr = fopen (name, mode); if (!ptr) - error (2, errno, _("cannot open file `%s'"), name); + error (EXIT_FAILURE, errno, _("cannot open file `%s'"), name); return ptr; } @@ -110,64 +130,112 @@ xfclose (FILE *ptr) result = fclose (ptr); if (result == EOF) - error (2, errno, _("cannot close file")); + error (EXIT_FAILURE, errno, _("cannot close file")); return result; } + + +/*----------------------------------------------------------------. +| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. | +`----------------------------------------------------------------*/ -/*--------------------------------------------------. -| Save the content of the obstack OBS in FILENAME. | -`--------------------------------------------------*/ +/* 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 *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); +} +/* Computes extensions from the grammar file extension. */ static void -obstack_save (struct obstack *obs, const char *filename) +compute_exts_from_gf (const char *ext) { - FILE *out = xfopen (filename, "w"); - size_t size = obstack_object_size (obs); - fwrite (obstack_finish (obs), 1, size, out); - xfclose (out); + 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'); +} -/*------------------------------------------------------------------. -| Return the path to the skeleton which locaction might be given in | -| ENVVAR, otherwise return SKELETON. | -`------------------------------------------------------------------*/ -const char * -skeleton_find (const char *envvar, const char *skeleton) -{ - const char *res = getenv (envvar); +/* 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. -#ifdef MSDOS - const char *cp; + *EXT points to the last period in the basename, or NULL if none. - /* 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); - } -#endif /* !MSDOS */ + 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. - if (!res) - res = skeleton; + None are allocated, they are simply pointers to parts of FILENAME. + Examples: - return res; + '/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"); } - -/*----------------------------------------. -| Compute BASE_NAME and SHORT_BASE_NAME. | -`----------------------------------------*/ /* FIXME: Should use xstrndup. */ static void -base_names (char **base_name, char **short_base_name) +compute_base_names (void) { - size_t base_length; - size_t short_base_length; + const char *base, *tab, *ext; /* If --output=foo.c was specified (SPEC_OUTFILE == foo.c), BASE_NAME and SHORT_BASE_NAME are `foo'. @@ -179,142 +247,94 @@ base_names (char **base_name, char **short_base_name) 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); - if (strsuffix (spec_outfile, ".c")) - base_length -= 2; - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = base_length; - if (strsuffix (spec_outfile, ".tab") || strsuffix (spec_outfile, "_tab")) - short_base_length -= 4; - *base_name = strndup (spec_outfile, base_length); - *short_base_name = strndup (spec_outfile, short_base_length); - - return; - } + filename_split (spec_outfile, &base, &tab, &ext); - /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME - are `foo'. + /* The full base name goes up the EXT, excluding it. */ + full_base_name = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (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); + /* 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)))); - *base_name = XMALLOC (char, - strlen (*short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (*base_name, *short_base_name), EXT_TAB); + if (tab) + output_infix = xstrndup (tab, + (strlen (tab) - (ext ? strlen (ext) : 0))); - 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); - if (strsuffix (name_base, ".y")) - base_length -= 2; - short_base_length = base_length; - *short_base_name = strndup (name_base, short_base_length); - - *base_name = XMALLOC (char, - strlen (*short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (*base_name, *short_base_name), EXT_TAB); - - return; - } + 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/bar.yy' => `bar'. */ + filename_split (infile, &base, &tab, &ext); + short_base_name = + xstrndup (base, + (strlen (base) - (ext ? strlen (ext) : 0))); + } + + /* In these cases, always append `.tab'. */ + output_infix = xstrdup (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); + + /* Computes the extensions from the grammar file name. */ + filename_split (infile, &base, &tab, &ext); + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } } -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ +/*-------------------------------------------------------. +| Close the open files, compute the output files names. | +`-------------------------------------------------------*/ void -open_files (void) +compute_output_file_names (void) { - char *base_name; - char *short_base_name; - - base_names (&base_name, &short_base_name); - - finput = xfopen (infile, "r"); - - if (verbose_flag) - { - /* We used to use just .out if spec_name_prefix (-p) was used, - but that conflicts with Posix. */ - outfile = stringappend (base_name, EXT_OUTPUT); - foutput = xfopen (outfile, "w"); - } + compute_base_names (); - if (no_parser_flag) - { - /* use permanent name for actions file */ - actfile = stringappend (short_base_name, ".act"); - } + /* If not yet done. */ + if (!src_extension) + src_extension = ".c"; + if (!header_extension) + header_extension = ".h"; - if (defines_flag) - { - defsfile = stringappend (base_name, ".h"); - } + parser_file_name = + spec_outfile ? spec_outfile : stringappend (full_base_name, src_extension); - /* These are opened by `done' or `open_extra_files', if at all */ - if (spec_outfile) - tabfile = spec_outfile; - else - tabfile = stringappend (base_name, ".c"); + /* It the defines filename if not given, we create it. */ + if (!spec_defines_file) + spec_defines_file = stringappend (full_base_name, header_extension); - attrsfile = stringappend (short_base_name, EXT_STYPE_H); - guardfile = stringappend (short_base_name, EXT_GUARD_C); + /* It the graph filename if not given, we create it. */ + if (!spec_graph_file) + spec_graph_file = stringappend (short_base_name, ".vcg"); - /* Initialize the obstacks. */ - obstack_init (&action_obstack); - obstack_init (&attrs_obstack); - obstack_init (&table_obstack); - obstack_init (&defines_obstack); -} - - - -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ - -void -output_files (void) -{ - xfclose (fguard); - xfclose (finput); - xfclose (foutput); - - /* Output the main file. */ - obstack_save (&table_obstack, tabfile); - - /* Output the header file if wanted. */ - if (defines_flag) - obstack_save (&defines_obstack, defsfile); - - /* If we output only the table, dump the actions in ACTFILE. - */ - if (no_parser_flag) - obstack_save (&action_obstack, actfile); - - /* If we produced a semantic parser ATTRS_OBSTACK must be dumped - into its own file, ATTTRSFILE. */ - if (semantic_parser) - obstack_save (&attrs_obstack, attrsfile); + spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT); }