X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/40675e7cc90b44d3c82c424946ea55083eb78121..bcbbf654863dd285b176a0f54a75a28c4bdac1d3:/src/files.c diff --git a/src/files.c b/src/files.c index e9a28f7d..f698c7e9 100644 --- a/src/files.c +++ b/src/files.c @@ -1,394 +1,396 @@ -/* Open and close files for bison, - Copyright (C) 1984, 1986, 1989 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. - -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. - -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, 675 Mass Ave, Cambridge, MA 02139, USA. */ - - -#ifdef VMS -#include -#define unlink delete -#ifndef XPFILE -#define XPFILE "GNU_BISON:[000000]BISON.SIMPLE" -#endif -#ifndef XPFILE1 -#define XPFILE1 "GNU_BISON:[000000]BISON.HAIRY" -#endif -#endif - -#include +/* 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. + + 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. + + 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 this program. If not, see . */ + +#include #include "system.h" + +#include +#include +#include +#include +#include +#include +#include + +#include "complain.h" #include "files.h" -#include "new.h" +#include "getargs.h" #include "gram.h" -FILE *finput = NULL; -FILE *foutput = NULL; -FILE *fdefines = NULL; -FILE *ftable = NULL; -FILE *fattrs = NULL; -FILE *fguard = NULL; -FILE *faction = NULL; -FILE *fparser = NULL; - -/* File name specified with -o for the output file, or 0 if no -o. */ -char *spec_outfile; - -char *infile; -char *outfile; -char *defsfile; -char *tabfile; -char *attrsfile; -char *guardfile; -char *actfile; -char *tmpattrsfile; -char *tmptabfile; -char *tmpdefsfile; - -extern char *mktemp(); /* So the compiler won't complain */ -extern char *getenv(); -extern void perror(); -FILE *tryopen(); /* This might be a good idea */ -void done(); - -extern char *program_name; -extern int verboseflag; -extern int definesflag; -int fixed_outfiles = 0; +/* 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 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; + +/* All computed output file names. */ +static char **file_names = NULL; +static int file_names_count = 0; + +uniqstr grammar_file = NULL; +uniqstr current_file = NULL; + +/* If --output=dir/foo.c was specified, + DIR_PREFIX is `dir/' and ALL_BUT_EXT and ALL_BUT_TAB_EXT are `dir/foo'. + + 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'. + + If --output was not specified but --file-prefix=dir/foo was specified, + ALL_BUT_EXT = `foo.tab' and ALL_BUT_TAB_EXT = `foo'. + + 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 | +| STR1, and STR2. | +`-----------------------------------------------------------------*/ -char* -stringappend(string1, end1, string2) -char *string1; -int end1; -char *string2; +static char * +concat2 (char const *str1, char const *str2) { - register char *ostring; - register char *cp, *cp1; - register int i; - - cp = string2; i = 0; - while (*cp++) i++; + size_t len = strlen (str1) + strlen (str2); + char *res = xmalloc (len + 1); + char *cp; + cp = stpcpy (res, str1); + cp = stpcpy (cp, str2); + return res; +} - ostring = NEW2(i+end1+1, char); +/*-----------------------------------------------------------------. +| Try to open file NAME with mode MODE, and print an error message | +| if fails. | +`-----------------------------------------------------------------*/ - cp = ostring; - cp1 = string1; - for (i = 0; i < end1; i++) - *cp++ = *cp1++; +FILE * +xfopen (const char *name, const char *mode) +{ + FILE *ptr; - cp1 = string2; - while (*cp++ = *cp1++) ; + ptr = fopen_safer (name, mode); + if (!ptr) + error (EXIT_FAILURE, get_errno (), + _("%s: cannot open"), quotearg_colon (name)); - return ostring; + return ptr; } +/*-------------------------------------------------------------. +| Try to close file PTR, and print an error message if fails. | +`-------------------------------------------------------------*/ -/* JF this has been hacked to death. Nowaday it sets up the file names for - the output files, and opens the tmp files and the parser */ void -openfiles() +xfclose (FILE *ptr) { - char *name_base; - register char *cp; - char *filename; - int base_length; - int short_base_length; - -#ifdef VMS - char *tmp_base = "sys$scratch:b_"; -#else - char *tmp_base = "/tmp/b."; -#endif - int tmp_len; - -#ifdef MSDOS - tmp_base = getenv ("TMP"); - if (tmp_base == 0) - tmp_base = ""; - strlwr (infile); -#endif /* MSDOS */ - - tmp_len = strlen (tmp_base); + if (ptr == NULL) + return; - if (spec_outfile) - { - /* -o was specified. The precise -o name will be used for ftable. - For other output files, remove the ".c" or ".tab.c" suffix. */ - name_base = spec_outfile; -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ - /* BASE_LENGTH includes ".tab" but not ".c". */ - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".c")) - base_length -= 2; - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = base_length; - if (!strncmp (name_base + short_base_length - 4, ".tab", 4)) - short_base_length -= 4; - else if (!strncmp (name_base + short_base_length - 4, "_tab", 4)) - short_base_length -= 4; - } - else if (spec_file_prefix) + if (ferror (ptr)) + error (EXIT_FAILURE, 0, _("input/output error")); + + if (fclose (ptr) != 0) + error (EXIT_FAILURE, get_errno (), _("cannot close file")); +} + + +/*------------------------------------------------------------------. +| Compute ALL_BUT_EXT, ALL_BUT_TAB_EXT and output files extensions. | +`------------------------------------------------------------------*/ + +/* Compute extensions from the grammar file extension. */ +static void +compute_exts_from_gf (const char *ext) +{ + if (strcmp (ext, ".y") == 0) { - /* -b was specified. Construct names from it. */ - /* SHORT_BASE_LENGTH includes neither ".tab" nor ".c". */ - short_base_length = strlen (spec_file_prefix); - /* Count room for `.tab'. */ - base_length = short_base_length + 4; - name_base = (char *) xmalloc (base_length + 1); - /* Append `.tab'. */ - strcpy (name_base, spec_file_prefix); -#ifdef VMS - strcat (name_base, "_tab"); -#else - strcat (name_base, ".tab"); -#endif -#ifdef MSDOS - strlwr (name_base); -#endif /* MSDOS */ + src_extension = xstrdup (language->src_extension); + header_extension = xstrdup (language->header_extension); } else { - /* -o was not specified; compute output file name from input - or use y.tab.c, etc., if -y was specified. */ - - name_base = fixed_outfiles ? "y.y" : infile; - - /* BASE_LENGTH gets length of NAME_BASE, sans ".y" suffix if any. */ - - base_length = strlen (name_base); - if (!strcmp (name_base + base_length - 2, ".y")) - base_length -= 2; - short_base_length = base_length; - -#ifdef VMS - name_base = stringappend(name_base, short_base_length, "_tab"); -#else -#ifdef MSDOS - name_base = stringappend(name_base, short_base_length, "_tab"); -#else - name_base = stringappend(name_base, short_base_length, ".tab"); -#endif /* not MSDOS */ -#endif - base_length = short_base_length + 4; + 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'); } +} - finput = tryopen(infile, "r"); +/* Compute 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 = xstrdup (ext); + tr (header_extension, 'c', 'h'); + tr (header_extension, 'C', 'H'); +} - filename = getenv("BISON_SIMPLE"); -#ifdef MSDOS - /* File doesn't exist in current directory; try in INIT directory. */ - cp = getenv("INIT"); - if (filename == 0 && cp != NULL) - { - filename = xmalloc(strlen(cp) + strlen(PFILE) + 2); - strcpy(filename, cp); - cp = filename + strlen(filename); - *cp++ = '/'; - strcpy(cp, PFILE); - } -#endif /* MSDOS */ - fparser = tryopen(filename ? filename : PFILE, "r"); - if (verboseflag) - { -#ifdef MSDOS - outfile = stringappend(name_base, short_base_length, ".out"); -#else - /* We used to use just .out if spec_name_prefix (-p) was used, - but that conflicts with Posix. */ - outfile = stringappend(name_base, short_base_length, ".output"); -#endif - foutput = tryopen(outfile, "w"); - } +/* 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. -#ifdef MSDOS - actfile = mktemp(stringappend(tmp_base, tmp_len, "acXXXXXX")); - tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "atXXXXXX")); - tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "taXXXXXX")); - tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "deXXXXXX")); -#else - actfile = mktemp(stringappend(tmp_base, tmp_len, "act.XXXXXX")); - tmpattrsfile = mktemp(stringappend(tmp_base, tmp_len, "attrs.XXXXXX")); - tmptabfile = mktemp(stringappend(tmp_base, tmp_len, "tab.XXXXXX")); - tmpdefsfile = mktemp(stringappend(tmp_base, tmp_len, "defs.XXXXXX")); -#endif /* not MSDOS */ - - faction = tryopen(actfile, "w+"); - fattrs = tryopen(tmpattrsfile,"w+"); - ftable = tryopen(tmptabfile, "w+"); - - if (definesflag) - { - defsfile = stringappend(name_base, base_length, ".h"); - fdefines = tryopen(tmpdefsfile, "w+"); - } + *EXT points to the last period in the basename, or NULL if none. -#ifndef MSDOS - unlink(actfile); - unlink(tmpattrsfile); - unlink(tmptabfile); - unlink(tmpdefsfile); -#endif + 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. - /* These are opened by `done' or `open_extra_files', if at all */ - if (spec_outfile) - tabfile = spec_outfile; - else - tabfile = stringappend(name_base, base_length, ".c"); - -#ifdef VMS - attrsfile = stringappend(name_base, short_base_length, "_stype.h"); - guardfile = stringappend(name_base, short_base_length, "_guard.c"); -#else -#ifdef MSDOS - attrsfile = stringappend(name_base, short_base_length, ".sth"); - guardfile = stringappend(name_base, short_base_length, ".guc"); -#else - attrsfile = stringappend(name_base, short_base_length, ".stype.h"); - guardfile = stringappend(name_base, short_base_length, ".guard.c"); -#endif /* not MSDOS */ -#endif /* not VMS */ -} + None are allocated, they are simply pointers to parts of FILE_NAME. + Examples: + '/tmp/foo.tab.c' -> *BASE = 'foo.tab.c', *TAB = '.tab.c', *EXT = + '.c' + 'foo.c' -> *BASE = 'foo.c', *TAB = NULL, *EXT = '.c' -/* open the output files needed only for the semantic parser. -This is done when %semantic_parser is seen in the declarations section. */ + 'tab.c' -> *BASE = 'tab.c', *TAB = NULL, *EXT = '.c' -void -open_extra_files() -{ - FILE *ftmp; - int c; - char *filename, *cp; + '.tab.c' -> *BASE = '.tab.c', *TAB = NULL, *EXT = '.c' - fclose(fparser); + 'foo.tab' -> *BASE = 'foo.tab', *TAB = NULL, *EXT = '.tab' - filename = (char *) getenv ("BISON_HAIRY"); -#ifdef MSDOS - /* File doesn't exist in current directory; try in INIT directory. */ - cp = getenv("INIT"); - if (filename == 0 && cp != NULL) - { - filename = xmalloc(strlen(cp) + strlen(PFILE1) + 2); - strcpy(filename, cp); - cp = filename + strlen(filename); - *cp++ = '/'; - strcpy(cp, PFILE1); - } -#endif - fparser= tryopen(filename ? filename : PFILE1, "r"); + 'foo_tab' -> *BASE = 'foo_tab', *TAB = NULL, *EXT = NULL - /* JF change from inline attrs file to separate one */ - ftmp = tryopen(attrsfile, "w"); - rewind(fattrs); - while((c=getc(fattrs))!=EOF) /* Thank god for buffering */ - putc(c,ftmp); - fclose(fattrs); - fattrs=ftmp; + 'foo' -> *BASE = 'foo', *TAB = NULL, *EXT = NULL. */ - fguard = tryopen(guardfile, "w"); +static void +file_name_split (const char *file_name, + const char **base, const char **tab, const char **ext) +{ + *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; + } } - /* JF to make file opening easier. This func tries to open file - NAME with mode MODE, and prints an error message if it fails. */ -FILE * -tryopen(name, mode) -char *name; -char *mode; + +static void +compute_file_name_parts (void) { - FILE *ptr; + const char *base, *tab, *ext; - ptr = fopen(name, mode); - if (ptr == NULL) + /* 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) { - fprintf(stderr, "%s: ", program_name); - perror(name); - done(2); + 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); + } + else + { + file_name_split (grammar_file, &base, &tab, &ext); + + 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))); + } + + if (language->add_tab) + all_but_ext = concat2 (all_but_tab_ext, TAB_EXT); + else + all_but_ext = xstrdup (all_but_tab_ext); + + /* Compute the extensions from the grammar file name. */ + if (ext && !yacc_flag) + compute_exts_from_gf (ext); } - return ptr; } + +/* Compute the output file names. Warn if we detect conflicting + outputs to the same file. */ + void -done(k) -int k; +compute_output_file_names (void) { - if (faction) - fclose(faction); + compute_file_name_parts (); - if (fattrs) - fclose(fattrs); + /* If not yet done. */ + if (!src_extension) + src_extension = xstrdup (".c"); + if (!header_extension) + header_extension = xstrdup (".h"); - if (fguard) - fclose(fguard); + parser_file_name = + (spec_outfile + ? xstrdup (spec_outfile) + : concat2 (all_but_ext, src_extension)); - if (finput) - fclose(finput); + if (defines_flag) + { + if (! spec_defines_file) + spec_defines_file = concat2 (all_but_ext, header_extension); + } - if (fparser) - fclose(fparser); + if (graph_flag) + { + if (! spec_graph_file) + spec_graph_file = concat2 (all_but_tab_ext, ".dot"); + output_file_name_check (&spec_graph_file); + } - if (foutput) - fclose(foutput); + if (xml_flag) + { + if (! spec_xml_file) + spec_xml_file = concat2 (all_but_tab_ext, ".xml"); + output_file_name_check (&spec_xml_file); + } - /* JF write out the output file */ - if (k == 0 && ftable) + if (report_flag) { - FILE *ftmp; - register int c; - - ftmp=tryopen(tabfile, "w"); - rewind(ftable); - while((c=getc(ftable)) != EOF) - putc(c,ftmp); - fclose(ftmp); - fclose(ftable); - - if (definesflag) - { - ftmp = tryopen(defsfile, "w"); - fflush(fdefines); - rewind(fdefines); - while((c=getc(fdefines)) != EOF) - putc(c,ftmp); - fclose(ftmp); - fclose(fdefines); - } + if (!spec_verbose_file) + spec_verbose_file = concat2 (all_but_tab_ext, OUTPUT_EXT); + output_file_name_check (&spec_verbose_file); } -#ifdef VMS - if (faction) - delete(actfile); - if (fattrs) - delete(tmpattrsfile); - if (ftable) - delete(tmptabfile); - if (k==0) sys$exit(SS$_NORMAL); - sys$exit(SS$_ABORT); -#else -#ifdef MSDOS - if (actfile) unlink(actfile); - if (tmpattrsfile) unlink(tmpattrsfile); - if (tmptabfile) unlink(tmptabfile); - if (tmpdefsfile) unlink(tmpdefsfile); -#endif /* MSDOS */ - exit(k); -#endif /* not VMS */ + free (all_but_tab_ext); + free (src_extension); + free (header_extension); +} + +void +output_file_name_check (char **file_name) +{ + 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); + } +} + +void +output_file_names_free (void) +{ + 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); }