X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/93ede233f5c0a96c0c4dc37b4b43d288d008f4e4..63951be29fcb8e21146a9377176d53d509c575ca:/src/files.c diff --git a/src/files.c b/src/files.c index 726ec917..f698c7e9 100644 --- a/src/files.c +++ b/src/files.c @@ -1,133 +1,103 @@ -/* Open and close files for bison, - Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc. +/* Open and close files for Bison. + + Copyright (C) 1984, 1986, 1989, 1992, 2000-2012 Free Software + Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison is free software; you can redistribute it and/or modify it - under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with Bison; see the file COPYING. If not, write to the Free - Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ - + along with this program. If not, see . */ +#include #include "system.h" -#include "getargs.h" + +#include +#include +#include +#include +#include +#include +#include + +#include "complain.h" #include "files.h" +#include "getargs.h" #include "gram.h" -#include "error.h" -#include "complain.h" -FILE *finput = NULL; +/* 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. */ -struct obstack action_obstack; -struct obstack attrs_obstack; -struct obstack guard_obstack; -struct obstack output_obstack; +char const *spec_outfile = NULL; /* for -o. */ +char const *spec_file_prefix = NULL; /* for -b. */ +char const *spec_name_prefix = NULL; /* for -p. */ +char *spec_verbose_file = NULL; /* for --verbose. */ +char *spec_graph_file = NULL; /* for -g. */ +char *spec_xml_file = NULL; /* for -x. */ +char *spec_defines_file = NULL; /* for --defines. */ +char *parser_file_name; -char *spec_outfile = NULL; /* for -o. */ -char *spec_file_prefix = NULL; /* for -b. */ -const char *spec_name_prefix = "yy"; /* 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; +/* All computed output file names. */ +static char **file_names = NULL; +static int file_names_count = 0; -char *infile = NULL; -char *attrsfile = NULL; +uniqstr grammar_file = NULL; +uniqstr current_file = NULL; -static char *base_name = NULL; -static char *short_base_name = NULL; +/* If --output=dir/foo.c was specified, + DIR_PREFIX is `dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are `dir/foo'. -/* 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; - + If --output=dir/foo.tab.c was specified, DIR_PREFIX is `dir/', + ALL_BUT_EXT is `dir/foo.tab', and ALL_BUT_TAB_EXT is `dir/foo'. -/*--------------------------. -| Is SUFFIX ending STRING? | -`--------------------------*/ + If --output was not specified but --file-prefix=dir/foo was specified, + ALL_BUT_EXT = `foo.tab' and ALL_BUT_TAB_EXT = `foo'. -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; -} + If neither --output nor --file was specified but the input grammar + is name dir/foo.y, ALL_BUT_EXT and ALL_BUT_TAB_EXT are `foo'. + + If neither --output nor --file was specified, DIR_PREFIX is the + empty string (meaning the current directory); otherwise it is + `dir/'. */ +char *all_but_ext; +static char *all_but_tab_ext; +char *dir_prefix; +/* C source file extension (the parser source). */ +static char *src_extension = NULL; +/* Header file extension (if option ``-d'' is specified). */ +static char *header_extension = NULL; + /*-----------------------------------------------------------------. | Return a newly allocated string composed of the concatenation of | -| STRING1, and STRING2. | +| STR1, and STR2. | `-----------------------------------------------------------------*/ static char * -stringappend (const char *string1, const char *string2) +concat2 (char const *str1, char const *str2) { - size_t len = strlen (string1) + strlen (string2); - char *res = XMALLOC (char, len + 1); + size_t len = strlen (str1) + strlen (str2); + char *res = xmalloc (len + 1); char *cp; - cp = stpcpy (res, string1); - cp = stpcpy (cp, string2); + cp = stpcpy (res, str1); + cp = stpcpy (cp, str2); 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 (base_name) + - strlen (header_extension) + 1); - cp = stpcpy (macro_name, prefix); - cp = stpcpy (cp, 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. | @@ -138,9 +108,10 @@ xfopen (const char *name, const char *mode) { FILE *ptr; - ptr = fopen (name, mode); + ptr = fopen_safer (name, mode); if (!ptr) - error (2, errno, _("cannot open file `%s'"), name); + error (EXIT_FAILURE, get_errno (), + _("%s: cannot open"), quotearg_colon (name)); return ptr; } @@ -149,352 +120,277 @@ xfopen (const char *name, const char *mode) | Try to close file PTR, and print an error message if fails. | `-------------------------------------------------------------*/ -int +void xfclose (FILE *ptr) { - int result; - if (ptr == NULL) - return 0; + return; - result = fclose (ptr); - if (result == EOF) - error (2, errno, _("cannot close file")); + if (ferror (ptr)) + error (EXIT_FAILURE, 0, _("input/output error")); - return result; + if (fclose (ptr) != 0) + error (EXIT_FAILURE, get_errno (), _("cannot close file")); } + -/*--------------------------------------------------. -| Save the content of the obstack OBS in FILENAME. | -`--------------------------------------------------*/ +/*------------------------------------------------------------------. +| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. | +`------------------------------------------------------------------*/ +/* Compute 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); + if (strcmp (ext, ".y") == 0) + { + src_extension = xstrdup (language->src_extension); + header_extension = xstrdup (language->header_extension); + } + else + { + src_extension = xstrdup (ext); + header_extension = xstrdup (ext); + tr (src_extension, 'y', 'c'); + tr (src_extension, 'Y', 'C'); + tr (header_extension, 'y', 'h'); + tr (header_extension, 'Y', 'H'); + } } -/*------------------------------------------------------------------. -| Return the path to the skeleton which locaction might be given in | -| ENVVAR, otherwise return SKELETON_NAME. | -`------------------------------------------------------------------*/ - -const char * -skeleton_find (const char *envvar, const char *skeleton_name) +/* Compute extensions from the given c source file extension. */ +static void +compute_exts_from_src (const char *ext) { - const char *res = getenv (envvar); + /* 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 = xstrdup (ext); + tr (header_extension, 'c', 'h'); + tr (header_extension, 'C', 'H'); +} -#if defined (MSDOS) || defined (_WIN32) - if (!res) - { - /* 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. */ - const char *cp = getenv ("INIT"); - 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 /* defined (MSDOS) || defined (_WIN32) */ - if (!res) - res = skeleton_name; +/* Decompose FILE_NAME in four parts: *BASE, *TAB, and *EXT, the fourth + part, (the directory) is ranging from FILE_NAME to the char before + *BASE, so we don't need an additional parameter. - return res; -} - + *EXT points to the last period in the basename, or NULL if none. -/*----------------------------------------------------------------. -| Compute BASE_NAME, SHORT_BASE_NAME and output files extensions. | -`----------------------------------------------------------------*/ + 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. -/* 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); -} + None are allocated, they are simply pointers to parts of FILE_NAME. + Examples: -/* Gets the extension index in FILENAME. Returns 0 if fails to - find an extension. */ -static int -get_extension_index (const char *filename) -{ - int len; + '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT = + '.c' - len = strlen (filename); + 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c' - if (filename[len-- - 1] == '.') - return (0); + 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c' - while ((len > 0) && (filename[len - 1] != '.')) - if (filename[len - 1] == '/') - return (0); - else - len--; + '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c' - return (len - 1); -} + 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab' -/* Computes extensions from the grammar file extension. */ -static void -compute_exts_from_gf (const char *ext) -{ - 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'); -} + 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL + + 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */ -/* Computes extensions from the given c source file extension. */ static void -compute_exts_from_src (const char *ext) +file_name_split (const char *file_name, + const char **base, const char **tab, 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'); + *base = last_component (file_name); + + /* Look for the extension, i.e., look for the last dot. */ + *ext = mbsrchr (*base, '.'); + *tab = NULL; + + /* If there is an extension, check if there is a `.tab' part right + before. */ + if (*ext) + { + size_t baselen = *ext - *base; + size_t dottablen = 4; + if (dottablen < baselen + && (strncmp (*ext - dottablen, ".tab", dottablen) == 0 + || strncmp (*ext - dottablen, "_tab", dottablen) == 0)) + *tab = *ext - dottablen; + } } -/* FIXME: Should use xstrndup. */ static void -compute_base_names (void) +compute_file_name_parts (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'. + const char *base, *tab, *ext; - If --output=foo.tab.c was specified, BASE_NAME is `foo.tab' and - SHORT_BASE_NAME is `foo'. + /* Compute ALL_BUT_EXT and ALL_BUT_TAB_EXT from SPEC_OUTFILE + or GRAMMAR_FILE. The precise -o name will be used for FTABLE. For other output 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); - } - - 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); - - return; + file_name_split (spec_outfile, &base, &tab, &ext); + dir_prefix = xstrndup (spec_outfile, base - spec_outfile); + + /* ALL_BUT_EXT goes up the EXT, excluding it. */ + all_but_ext = + xstrndup (spec_outfile, + (strlen (spec_outfile) - (ext ? strlen (ext) : 0))); + + /* ALL_BUT_TAB_EXT goes up to TAB, excluding it. */ + all_but_tab_ext = + xstrndup (spec_outfile, + (strlen (spec_outfile) + - (tab ? strlen (tab) : (ext ? strlen (ext) : 0)))); + + if (ext) + compute_exts_from_src (ext); } - - /* If --file-prefix=foo was specified, BASE_NAME and SHORT_BASE_NAME - are `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); - - 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; + file_name_split (grammar_file, &base, &tab, &ext); - /* 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, ALL_BUT_TAB_EXT = `foo'. */ + dir_prefix = + xstrndup (spec_file_prefix, + last_component (spec_file_prefix) - spec_file_prefix); + all_but_tab_ext = xstrdup (spec_file_prefix); + } + else if (yacc_flag) + { + /* If --yacc, then the output is `y.tab.c'. */ + dir_prefix = xstrdup (""); + all_but_tab_ext = xstrdup ("y"); + } + else + { + /* Otherwise, ALL_BUT_TAB_EXT is computed from the input + grammar: `foo/bar.yy' => `bar'. */ + dir_prefix = xstrdup (""); + all_but_tab_ext = + xstrndup (base, (strlen (base) - (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 (language->add_tab) + all_but_ext = concat2 (all_but_tab_ext, TAB_EXT); + else + all_but_ext = xstrdup (all_but_tab_ext); - return; - } + /* Compute the extensions from the grammar file name. */ + if (ext && !yacc_flag) + compute_exts_from_gf (ext); + } } -/*-------------------------------------------------------. -| Close the open files, compute the output files names. | -`-------------------------------------------------------*/ + +/* Compute the output file names. Warn if we detect conflicting + outputs to the same file. */ void compute_output_file_names (void) { - compute_base_names (); - - parser_file_name = - spec_outfile ? spec_outfile : stringappend (base_name, src_extension); + compute_file_name_parts (); /* If not yet done. */ if (!src_extension) - src_extension = ".c"; + src_extension = xstrdup (".c"); if (!header_extension) - header_extension = ".h"; - - /* It the defines filename if not given, we create it. */ - if (!spec_defines_file) - spec_defines_file = stringappend (base_name, header_extension); + header_extension = xstrdup (".h"); - /* It the graph filename if not given, we create it. */ - if (!spec_graph_file) - spec_graph_file = stringappend (short_base_name, ".vcg"); + parser_file_name = + (spec_outfile + ? xstrdup (spec_outfile) + : concat2 (all_but_ext, src_extension)); - spec_verbose_file = stringappend (short_base_name, EXT_OUTPUT); + if (defines_flag) + { + if (! spec_defines_file) + spec_defines_file = concat2 (all_but_ext, header_extension); + } - attrsfile = stringappend (short_base_name, EXT_STYPE_H); -#ifndef MSDOS - attrsfile = stringappend (attrsfile, header_extension); -#endif /* MSDOS */ -} + if (graph_flag) + { + if (! spec_graph_file) + spec_graph_file = concat2 (all_but_tab_ext, ".dot"); + output_file_name_check (&spec_graph_file); + } -/*-----------------------------------------------------------------. -| Open the input file. Look for the skeletons. Find the names of | -| the output files. Prepare the obstacks. | -`-----------------------------------------------------------------*/ + if (xml_flag) + { + if (! spec_xml_file) + spec_xml_file = concat2 (all_but_tab_ext, ".xml"); + output_file_name_check (&spec_xml_file); + } -void -open_files (void) -{ - finput = xfopen (infile, "r"); + if (report_flag) + { + if (!spec_verbose_file) + spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT); + output_file_name_check (&spec_verbose_file); + } - /* Initialize the obstacks. */ - obstack_init (&action_obstack); - obstack_init (&attrs_obstack); - obstack_init (&guard_obstack); - obstack_init (&output_obstack); + free (all_but_tab_ext); + free (src_extension); + free (header_extension); } - - -/*-----------------------. -| Close the open file.. | -`-----------------------*/ - void -close_files (void) +output_file_name_check (char **file_name) { - xfclose (finput); + bool conflict = false; + if (0 == strcmp (*file_name, grammar_file)) + { + complain (_("refusing to overwrite the input file %s"), + quote (*file_name)); + conflict = true; + } + else + { + int i; + for (i = 0; i < file_names_count; i++) + if (0 == strcmp (file_names[i], *file_name)) + { + warn (_("conflicting outputs to file %s"), + quote (*file_name)); + conflict = true; + } + } + if (conflict) + { + free (*file_name); + *file_name = strdup ("/dev/null"); + } + else + { + file_names = xnrealloc (file_names, ++file_names_count, + sizeof *file_names); + file_names[file_names_count-1] = xstrdup (*file_name); + } } -/*---------------------------. -| Produce the output files. | -`---------------------------*/ - void -output_files (void) +output_file_names_free (void) { -#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); - } + free (all_but_ext); + free (spec_verbose_file); + free (spec_graph_file); + free (spec_xml_file); + free (spec_defines_file); + free (parser_file_name); + free (dir_prefix); + { + int i; + for (i = 0; i < file_names_count; i++) + free (file_names[i]); + } + free (file_names); }