www.pudn.com > bison.zip > files.c

/* 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.  */ 
 
 
#if defined (VMS) & !defined (__VMS_POSIX) 
#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; 
 
#if defined (VMS) & !defined (__VMS_POSIX) 
  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 *) 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 */ 
    } 
  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 != 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"); 
    } 
 
#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 != 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"); 
 
		/* 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); 
        } 
    } 
 
#if defined (VMS) & !defined (__VMS_POSIX) 
  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, or __VMS_POSIX */ 
}