From 54bd0db43634c649d13e175384e6e816c44a34d4 Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Thu, 15 Apr 1993 19:37:53 +0000 Subject: [PATCH] Initial revision --- src/files.c | 394 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/main.c | 140 +++++++++++++++++++++ 2 files changed, 534 insertions(+) create mode 100644 src/files.c create mode 100644 src/main.c diff --git a/src/files.c b/src/files.c new file mode 100644 index 0000000..0034242 --- /dev/null +++ b/src/files.c @@ -0,0 +1,394 @@ +/* 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 +#include "system.h" +#include "files.h" +#include "new.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; + + +char* +stringappend(string1, end1, string2) +char *string1; +int end1; +char *string2; +{ + register char *ostring; + register char *cp, *cp1; + register int i; + + cp = string2; i = 0; + while (*cp++) i++; + + ostring = NEW2(i+end1+1, char); + + cp = ostring; + cp1 = string1; + for (i = 0; i < end1; i++) + *cp++ = *cp1++; + + cp1 = string2; + while (*cp++ = *cp1++) ; + + return ostring; +} + + +/* 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() +{ + 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 (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) + { + /* -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 *) mallocate (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 */ + } + 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; + } + + finput = tryopen(infile, "r"); + + filename = getenv("BISON_SIMPLE"); +#ifdef MSDOS + /* File doesn't exist in current directory; try in INIT directory. */ + cp = getenv("INIT"); + if (filename == 0 && cp != 0) + { + filename = malloc(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"); + } + +#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+"); + } + +#ifndef MSDOS + unlink(actfile); + unlink(tmpattrsfile); + unlink(tmptabfile); + unlink(tmpdefsfile); +#endif + + /* 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 */ +} + + + +/* open the output files needed only for the semantic parser. +This is done when %semantic_parser is seen in the declarations section. */ + +void +open_extra_files() +{ + FILE *ftmp; + int c; + char *filename, *cp; + + fclose(fparser); + + 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 != 0) + { + filename = malloc(strlen(cp) + strlen(PFILE1) + 2); + strcpy(filename, cp); + cp = filename + strlen(filename); + *cp++ = '/'; + strcpy(cp, PFILE1); + } +#endif + fparser= tryopen(filename ? filename : PFILE1, "r"); + + /* 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; + + fguard = tryopen(guardfile, "w"); + +} + + /* 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; +{ + FILE *ptr; + + ptr = fopen(name, mode); + if (ptr == NULL) + { + fprintf(stderr, "%s: ", program_name); + perror(name); + done(2); + } + return ptr; +} + +void +done(k) +int k; +{ + if (faction) + fclose(faction); + + if (fattrs) + fclose(fattrs); + + if (fguard) + fclose(fguard); + + if (finput) + fclose(finput); + + if (fparser) + fclose(fparser); + + if (foutput) + fclose(foutput); + + /* JF write out the output file */ + if (k == 0 && ftable) + { + 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); + } + } + +#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 */ +} diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..dc53fd8 --- /dev/null +++ b/src/main.c @@ -0,0 +1,140 @@ +/* Top level entry point of 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. */ + + +#include +#include "system.h" +#include "machine.h" /* JF for MAXSHORT */ + +extern int lineno; +extern int verboseflag; + +/* Nonzero means failure has been detected; don't write a parser file. */ +int failure; + +/* The name this program was run with, for messages. */ +char *program_name; + +extern void getargs(), openfiles(), reader(), reduce_grammar(); +extern void set_derives(), set_nullable(), generate_states(); +extern void lalr(), initialize_conflicts(), verbose(), terse(); +extern void output(), done(); + + +/* VMS complained about using `int'. */ +int +main(argc, argv) +int argc; +char *argv[]; +{ + program_name = argv[0]; + failure = 0; + lineno = 0; + getargs(argc, argv); + openfiles(); + + /* read the input. Copy some parts of it to fguard, faction, ftable and fattrs. + In file reader.c. + The other parts are recorded in the grammar; see gram.h. */ + reader(); + + /* find useless nonterminals and productions and reduce the grammar. In + file reduce.c */ + reduce_grammar(); + + /* record other info about the grammar. In files derives and nullable. */ + set_derives(); + set_nullable(); + + /* convert to nondeterministic finite state machine. In file LR0. + See state.h for more info. */ + generate_states(); + + /* make it deterministic. In file lalr. */ + lalr(); + + /* Find and record any conflicts: places where one token of lookahead is not + enough to disambiguate the parsing. In file conflicts. + Currently this does not do anything to resolve them; + the trivial form of conflict resolution that exists is done in output. */ + initialize_conflicts(); + + /* print information about results, if requested. In file print. */ + if (verboseflag) + verbose(); + else + terse(); + + /* output the tables and the parser to ftable. In file output. */ + output(); + done(failure); +} + +/* functions to report errors which prevent a parser from being generated */ + +void +fatal(s) +char *s; +{ + extern char *infile; + + if (infile == 0) + fprintf(stderr, "fatal error: %s\n", s); + else + fprintf(stderr, "\"%s\", line %d: %s\n", infile, lineno, s); + done(1); +} + + +/* JF changed to accept/deal with variable args. + DO NOT change this to use varargs. It will appear to work + but will break on systems that don't have the necessary library + functions. This is the ONLY safe way to write such a function. */ +/*VARARGS1*/ + +void +fatals(fmt,x1,x2,x3,x4,x5,x6,x7,x8) +char *fmt; +{ + char buffer[200]; + + sprintf(buffer, fmt, x1,x2,x3,x4,x5,x6,x7,x8); + fatal(buffer); +} + + +void +toomany(s) +char *s; +{ + char buffer[200]; + + /* JF new msg */ + sprintf(buffer, "limit of %d exceeded, too many %s", MAXSHORT, s); + fatal(buffer); +} + + +void +berror(s) +char *s; +{ + fprintf(stderr, "internal error, %s\n", s); + abort(); +} -- 2.7.4