X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4ecbf79698e495808bea66403211a2449f0fff52..c47dc59adc0864783aedce4c60a35016716aef98:/src/files.c diff --git a/src/files.c b/src/files.c index 402025bf..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. @@ -22,41 +23,57 @@ #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 PARAMS ((char const *name)); + FILE *finput = 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; + +/* 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. */ -char *spec_name_prefix = NULL; /* for -p. */ +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; 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). */ +/* C source file extension (the parser source). */ const char *src_extension = NULL; -/* Header file extension (if option ``-d'' is specified). */ +/* 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); @@ -73,7 +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); @@ -84,6 +101,49 @@ stringappend (const char *string1, const char *string2) return res; } + +/*-----------------------------------------------------------------. +| 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). | +`-----------------------------------------------------------------*/ + +char * +compute_header_macro (void) +{ + const char *prefix = "BISON_"; + char *macro_name, *cp; + + 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 (full_base_name) + + strlen (header_extension) + 1); + cp = stpcpy (macro_name, prefix); + cp = stpcpy (cp, full_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 macro_name; +} + + /*-----------------------------------------------------------------. | Try to open file NAME with mode MODE, and print an error message | | if fails. | @@ -120,19 +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); -} - /*------------------------------------------------------------------. | Return the path to the skeleton which locaction might be given in | @@ -144,32 +191,57 @@ skeleton_find (const char *envvar, const char *skeleton_name) { const char *res = getenv (envvar); -#ifdef MSDOS - const char *cp; - - /* File doesn't exist in current directory; try in INIT directory. */ - if (!res && (cp = getenv ("INIT"))) +#if defined (MSDOS) || defined (_WIN32) + const char *cp = getenv ("INIT"); + if (!res) { - res = XMALLOC (char, strlen (cp) + strlen (skeleton_name) + 2); - sprintf (res, "%s%c%s", cp, '/', skeleton_name); + /* 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. */ + 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 /* !MSDOS */ - +#endif /* defined (MSDOS) || defined (_WIN32) */ if (!res) res = skeleton_name; return res; } - + /*----------------------------------------------------------------. | 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. */ + and returns a new allocated string. */ static char * -tr(const char *in, char from, char to) +tr (const char *in, char from, char to) { char *temp; char *out; @@ -185,67 +257,83 @@ 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) +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'); - } + 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) +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'); + src_extension = xstrdup (ext); + header_extension = tr (ext, 'c', 'h'); + 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'. @@ -257,170 +345,96 @@ 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; + /* If --file-prefix=foo was specified, FULL_BASE_NAME = `foo.tab' + and SHORT_BASE_NAME = `foo'. - /* 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); - - base_name = XMALLOC (char, - strlen (short_base_name) + strlen (EXT_TAB) + 1); - stpcpy (stpcpy (base_name, short_base_name), EXT_TAB); + 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))); + } - return; - } -} + /* In these cases, always append `.tab'. */ + output_infix = xstrdup (EXT_TAB); -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ + full_base_name = XMALLOC (char, + strlen (short_base_name) + + strlen (EXT_TAB) + 1); + stpcpy (stpcpy (full_base_name, short_base_name), EXT_TAB); -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); + /* Computes the extensions from the grammar file name. */ + filename_split (infile, &base, &tab, &ext); + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } } - - -/*-----------------------------------------------------. -| Close the open files, produce all the output files. | -`-----------------------------------------------------*/ +/*-------------------------------------------------------. +| Close the open files, compute the output files names. | +`-------------------------------------------------------*/ void -output_files (void) +compute_output_file_names (void) { - xfclose (finput); - compute_base_names (); - /* Set default extensions */ + /* 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 (full_base_name, header_extension); - attrsfile = stringappend (short_base_name, EXT_STYPE_H); -#ifndef MSDOS - stringappend (attrsfile, header_extension); -#endif /* MSDOS */ - - /* Output the main file. */ - if (spec_outfile) - obstack_save (&table_obstack, spec_outfile); - else - obstack_save (&table_obstack, stringappend (base_name, src_extension)); + /* It the graph filename if not given, we create it. */ + if (!spec_graph_file) + spec_graph_file = stringappend (short_base_name, ".vcg"); - /* Output the header file if wanted. */ - if (defines_flag) - obstack_save (&defines_obstack, stringappend (base_name, header_extension)); + spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT); - /* If we output only the table, dump the actions in ACTFILE. */ - if (no_parser_flag) - 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) - { - 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")); + attrsfile = stringappend (short_base_name, EXT_STYPE_H); }