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format.c

/****************************************************************
Copyright 1990-1996, 1999-2001 by AT&T, Lucent Technologies and Bellcore.

Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the names of AT&T, Bell Laboratories,
Lucent or Bellcore or any of their entities not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

AT&T, Lucent and Bellcore disclaim all warranties with regard to
this software, including all implied warranties of
merchantability and fitness.  In no event shall AT&T, Lucent or
Bellcore be liable for any special, indirect or consequential
damages or any damages whatsoever resulting from loss of use,
data or profits, whether in an action of contract, negligence or
other tortious action, arising out of or in connection with the
use or performance of this software.
****************************************************************/

/* Format.c -- this file takes an intermediate file (generated by pass 1
   of the translator) and some state information about the contents of that
   file, and generates C program text. */

#include "defs.h"
#include "p1defs.h"
#include "format.h"
#include "output.h"
#include "names.h"
#include "iob.h"

int c_output_line_length = DEF_C_LINE_LENGTH;

int last_was_label;     /* Boolean used to generate semicolons
                           when a label terminates a block */
static char this_proc_name[52];     /* Name of the current procedure.  This is
                           probably too simplistic to handle
                           multiple entry points */

static tagptr do_format Argdcl((FILEP, FILEP));
static void do_p1_1while Argdcl((FILEP));
static void do_p1_2while Argdcl((FILEP, FILEP));
static tagptr do_p1_addr Argdcl((FILEP, FILEP));
static void do_p1_asgoto Argdcl((FILEP, FILEP));
static tagptr do_p1_charp Argdcl((FILEP));
static void do_p1_comment Argdcl((FILEP, FILEP));
static void do_p1_comp_goto Argdcl((FILEP, FILEP));
static tagptr do_p1_const Argdcl((FILEP));
static void do_p1_elif Argdcl((FILEP, FILEP));
static void do_p1_else Argdcl((FILEP));
static void do_p1_elseifstart Argdcl((FILEP));
static void do_p1_end_for Argdcl((FILEP));
static void do_p1_endelse Argdcl((FILEP));
static void do_p1_endif Argdcl((FILEP));
static tagptr do_p1_expr Argdcl((FILEP, FILEP));
static tagptr do_p1_extern Argdcl((FILEP));
static void do_p1_for Argdcl((FILEP, FILEP));
static void do_p1_fortran Argdcl((FILEP, FILEP));
static void do_p1_goto Argdcl((FILEP, FILEP));
static tagptr do_p1_head Argdcl((FILEP, FILEP));
static tagptr do_p1_ident Argdcl((FILEP));
static void do_p1_if Argdcl((FILEP, FILEP));
static void do_p1_label Argdcl((FILEP, FILEP));
static tagptr do_p1_list Argdcl((FILEP, FILEP));
static tagptr do_p1_literal Argdcl((FILEP));
static tagptr do_p1_name_pointer Argdcl((FILEP));
static void do_p1_set_line Argdcl((FILEP));
static void do_p1_subr_ret Argdcl((FILEP, FILEP));
static int get_p1_token Argdcl((FILEP));
static int p1get_const Argdcl((FILEP, int, Constp*));
static int p1getd Argdcl((FILEP, long int*));
static int p1getf Argdcl((FILEP, char**));
static int p1getn Argdcl((FILEP, int, char**));
static int p1gets Argdcl((FILEP, char*, int));
static void proto Argdcl((FILEP, Argtypes*, char*));

extern chainp assigned_fmts;
char filename[P1_FILENAME_MAX];
extern int gflag, sharp_line, trapuv;
extern int typeconv[];
int gflag1;
extern char *parens;

 void
start_formatting(Void)
{
    FILE *infile;
    static int wrote_one = 0;
    extern int usedefsforcommon;
    extern char p1_file[], p1_bakfile[];

    this_proc_name[0] = '\0';
    last_was_label = 0;
    ei_next = ei_first;
    wh_next = wh_first;

    (void) fclose (pass1_file);
    if ((infile = fopen (p1_file, binread)) == NULL)
      Fatal("start_formatting:  couldn't open the intermediate file\n");

    if (wrote_one)
      nice_printf (c_file, "\n");

    while (!feof (infile)) {
      expptr this_expr;

      this_expr = do_format (infile, c_file);
      if (this_expr) {
          out_and_free_statement (c_file, this_expr);
      } /* if this_expr */
    } /* while !feof infile */

    (void) fclose (infile);

    if (last_was_label)
      nice_printf (c_file, ";\n");

    prev_tab (c_file);
    gflag1 = sharp_line = 0;
    if (this_proc_name[0])
      nice_printf (c_file, "} /* %s */\n", this_proc_name);


/* Write the #undefs for common variable reference */

    if (usedefsforcommon) {
      Extsym *ext;
      int did_one = 0;

      for (ext = extsymtab; ext < nextext; ext++)
          if (ext -> extstg == STGCOMMON && ext -> used_here) {
            ext -> used_here = 0;
            if (!did_one)
                nice_printf (c_file, "\n");
            wr_abbrevs(c_file, 0, ext->extp);
            did_one = 1;
            ext -> extp = CHNULL;
          } /* if */

      if (did_one)
          nice_printf (c_file, "\n");
    } /* if usedefsforcommon */

    other_undefs(c_file);

    wrote_one = 1;

/* For debugging only */

    if (debugflag && (pass1_file = fopen (p1_bakfile, binwrite)))
      if (infile = fopen (p1_file, binread)) {
          ffilecopy (infile, pass1_file);
          fclose (infile);
          fclose (pass1_file);
      } /* if infile */

/* End of "debugging only" */

    scrub(p1_file);     /* optionally unlink */

    if ((pass1_file = fopen (p1_file, binwrite)) == NULL)
      err ("start_formatting:  couldn't reopen the pass1 file");

} /* start_formatting */


 static void
#ifdef KR_headers
put_semi(outfile)
      FILE *outfile;
#else
put_semi(FILE *outfile)
#endif
{
      nice_printf (outfile, ";\n");
      last_was_label = 0;
      }

#define SEM_CHECK(x) if (last_was_label) put_semi(x)

/* do_format -- takes an input stream (a file in pass1 format) and writes
   the appropriate C code to   outfile   when possible.  When reading an
   expression, the expression tree is returned instead. */

 static expptr
#ifdef KR_headers
do_format(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_format(FILE *infile, FILE *outfile)
#endif
{
    int token_type, was_c_token;
    expptr retval = ENULL;

    token_type = get_p1_token (infile);
    was_c_token = 1;
    switch (token_type) {
      case P1_COMMENT:
          do_p1_comment (infile, outfile);
          was_c_token = 0;
          break;
      case P1_SET_LINE:
          do_p1_set_line (infile);
          was_c_token = 0;
          break;
      case P1_FILENAME:
          p1gets(infile, filename, P1_FILENAME_MAX);
          was_c_token = 0;
          break;
      case P1_NAME_POINTER:
          retval = do_p1_name_pointer (infile);
          break;
      case P1_CONST:
          retval = do_p1_const (infile);
          break;
      case P1_EXPR:
          retval = do_p1_expr (infile, outfile);
          break;
      case P1_IDENT:
          retval = do_p1_ident(infile);
          break;
      case P1_CHARP:
            retval = do_p1_charp(infile);
            break;
      case P1_EXTERN:
          retval = do_p1_extern (infile);
          break;
      case P1_HEAD:
          gflag1 = sharp_line = 0;
          retval = do_p1_head (infile, outfile);
          gflag1 = sharp_line = gflag;
          break;
      case P1_LIST:
          retval = do_p1_list (infile, outfile);
          break;
      case P1_LITERAL:
          retval = do_p1_literal (infile);
          break;
      case P1_LABEL:
          do_p1_label (infile, outfile);
          /* last_was_label = 1; -- now set in do_p1_label */
          was_c_token = 0;
          break;
      case P1_ASGOTO:
          do_p1_asgoto (infile, outfile);
          break;
      case P1_GOTO:
          do_p1_goto (infile, outfile);
          break;
      case P1_IF:
          do_p1_if (infile, outfile);
          break;
      case P1_ELSE:
          SEM_CHECK(outfile);
          do_p1_else (outfile);
          break;
      case P1_ELIF:
          SEM_CHECK(outfile);
          do_p1_elif (infile, outfile);
          break;
      case P1_ENDIF:
          SEM_CHECK(outfile);
          do_p1_endif (outfile);
          break;
      case P1_ENDELSE:
          SEM_CHECK(outfile);
          do_p1_endelse (outfile);
          break;
      case P1_ADDR:
          retval = do_p1_addr (infile, outfile);
          break;
      case P1_SUBR_RET:
          do_p1_subr_ret (infile, outfile);
          break;
      case P1_COMP_GOTO:
          do_p1_comp_goto (infile, outfile);
          break;
      case P1_FOR:
          do_p1_for (infile, outfile);
          break;
      case P1_ENDFOR:
          SEM_CHECK(outfile);
          do_p1_end_for (outfile);
          break;
      case P1_WHILE1START:
            do_p1_1while(outfile);
            break;
      case P1_WHILE2START:
            do_p1_2while(infile, outfile);
            break;
      case P1_PROCODE:
            procode(outfile);
            break;
      case P1_ELSEIFSTART:
            SEM_CHECK(outfile);
            do_p1_elseifstart(outfile);
            break;
      case P1_FORTRAN:
            do_p1_fortran(infile, outfile);
            /* no break; */
      case P1_EOF:
          was_c_token = 0;
          break;
      case P1_UNKNOWN:
          Fatal("do_format:  Unknown token type in intermediate file");
          break;
      default:
          Fatal("do_format:  Bad token type in intermediate file");
          break;
   } /* switch */

    if (was_c_token)
      last_was_label = 0;
    return retval;
} /* do_format */


 static void
#ifdef KR_headers
do_p1_comment(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_comment(FILE *infile, FILE *outfile)
#endif
{
    extern int in_comment;

    char storage[COMMENT_BUFFER_SIZE + 1];
    int length;

    if (!p1gets(infile, storage, COMMENT_BUFFER_SIZE + 1))
      return;

    length = strlen (storage);

    gflag1 = sharp_line = 0;
    in_comment = 1;
    margin_printf(outfile, length ? "/* %s */\n" : "\n", storage);
    in_comment = 0;
    gflag1 = sharp_line = gflag;
} /* do_p1_comment */

 static void
#ifdef KR_headers
do_p1_set_line(infile)
      FILE *infile;
#else
do_p1_set_line(FILE *infile)
#endif
{
    int status;
    long new_line_number = -1;

    status = p1getd (infile, &new_line_number);

    if (status == EOF)
      err ("do_p1_set_line:  Missing line number at end of file\n");
    else if (status == 0 || new_line_number == -1)
      errl("do_p1_set_line:  Illegal line number in intermediate file: %ld\n",
            new_line_number);
    else {
      lineno = new_line_number;
      }
} /* do_p1_set_line */


 static expptr
#ifdef KR_headers
do_p1_name_pointer(infile)
      FILE *infile;
#else
do_p1_name_pointer(FILE *infile)
#endif
{
    Namep namep = (Namep) NULL;
    int status;

    status = p1getd (infile, (long *) &namep);

    if (status == EOF)
      err ("do_p1_name_pointer:  Missing pointer at end of file\n");
    else if (status == 0 || namep == (Namep) NULL)
      erri ("do_p1_name_pointer:  Illegal name pointer in p1 file: '#%lx'\n",
            (unsigned long) namep);

    return (expptr) namep;
} /* do_p1_name_pointer */



 static expptr
#ifdef KR_headers
do_p1_const(infile)
      FILE *infile;
#else
do_p1_const(FILE *infile)
#endif
{
    struct Constblock *c = (struct Constblock *) NULL;
    long type = -1;
    int status;

    status = p1getd (infile, &type);

    if (status == EOF)
      err ("do_p1_const:  Missing constant type at end of file\n");
    else if (status == 0)
      errl("do_p1_const:  Illegal constant type in p1 file: %ld\n", type);
    else {
      status = p1get_const (infile, (int)type, &c);

      if (status == EOF) {
          err ("do_p1_const:  Missing constant value at end of file\n");
          c = (struct Constblock *) NULL;
      } else if (status == 0) {
          err ("do_p1_const:  Illegal constant value in p1 file\n");
          c = (struct Constblock *) NULL;
      } /* else */
    } /* else */
    return (expptr) c;
} /* do_p1_const */

 void
#ifdef KR_headers
addrlit(addrp)
      Addrp addrp;
#else
addrlit(Addrp addrp)
#endif
{
      long memno = addrp->memno;
      struct Literal *litp, *lastlit;

      lastlit = litpool + nliterals;
      for (litp = litpool; litp < lastlit; litp++)
          if (litp->litnum == memno) {
            addrp->vtype = litp->littype;
            *((union Constant *) &(addrp->user)) =
                  *((union Constant *) &(litp->litval));
            addrp->vstg = STGMEMNO;
            return;
            }
      err("addrlit failure!");
      }

 static expptr
#ifdef KR_headers
do_p1_literal(infile)
      FILE *infile;
#else
do_p1_literal(FILE *infile)
#endif
{
    int status;
    long memno;
    Addrp addrp;

    status = p1getd (infile, &memno);

    if (status == EOF)
      err ("do_p1_literal:  Missing memno at end of file");
    else if (status == 0)
      err ("do_p1_literal:  Missing memno in p1 file");
    else {
      addrp = ALLOC (Addrblock);
      addrp -> tag = TADDR;
      addrp -> vtype = TYUNKNOWN;
      addrp -> Field = NULL;
      addrp -> memno = memno;
      addrlit(addrp);
      addrp -> uname_tag = UNAM_CONST;
    } /* else */

    return (expptr) addrp;
} /* do_p1_literal */


 static void
#ifdef KR_headers
do_p1_label(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_label(FILE *infile, FILE *outfile)
#endif
{
    int status;
    ftnint stateno;
    struct Labelblock *L;
    char *fmt;

    status = p1getd (infile, &stateno);

    if (status == EOF)
      err ("do_p1_label:  Missing label at end of file");
    else if (status == 0)
      err ("do_p1_label:  Missing label in p1 file ");
    else if (stateno < 0) {   /* entry */
      margin_printf(outfile, "\n%s:\n", user_label(stateno));
      last_was_label = 1;
      }
    else {
      L = labeltab + stateno;
      if (L->labused) {
            fmt = "%s:\n";
            last_was_label = 1;
            }
      else
            fmt = "/* %s: */\n";
      margin_printf(outfile, fmt, user_label(L->stateno));
    } /* else */
} /* do_p1_label */



 static void
#ifdef KR_headers
do_p1_asgoto(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_asgoto(FILE *infile, FILE *outfile)
#endif
{
    expptr expr;

    expr = do_format (infile, outfile);
    out_asgoto (outfile, expr);

} /* do_p1_asgoto */


 static void
#ifdef KR_headers
do_p1_goto(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_goto(FILE *infile, FILE *outfile)
#endif
{
    int status;
    long stateno;

    status = p1getd (infile, &stateno);

    if (status == EOF)
      err ("do_p1_goto:  Missing goto label at end of file");
    else if (status == 0)
      err ("do_p1_goto:  Missing goto label in p1 file");
    else {
      nice_printf (outfile, "goto %s;\n", user_label (stateno));
    } /* else */
} /* do_p1_goto */


 static void
#ifdef KR_headers
do_p1_if(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_if(FILE *infile, FILE *outfile)
#endif
{
    expptr cond;

    do {
        cond = do_format (infile, outfile);
    } while (cond == ENULL);

    out_if (outfile, cond);
} /* do_p1_if */


 static void
#ifdef KR_headers
do_p1_else(outfile)
      FILE *outfile;
#else
do_p1_else(FILE *outfile)
#endif
{
    out_else (outfile);
} /* do_p1_else */


 static void
#ifdef KR_headers
do_p1_elif(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_elif(FILE *infile, FILE *outfile)
#endif
{
    expptr cond;

    do {
        cond = do_format (infile, outfile);
    } while (cond == ENULL);

    elif_out (outfile, cond);
} /* do_p1_elif */

 static void
#ifdef KR_headers
do_p1_endif(outfile)
      FILE *outfile;
#else
do_p1_endif(FILE *outfile)
#endif
{
    endif_out (outfile);
} /* do_p1_endif */


 static void
#ifdef KR_headers
do_p1_endelse(outfile)
      FILE *outfile;
#else
do_p1_endelse(FILE *outfile)
#endif
{
    end_else_out (outfile);
} /* do_p1_endelse */


 static expptr
#ifdef KR_headers
do_p1_addr(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_addr(FILE *infile, FILE *outfile)
#endif
{
    Addrp addrp = (Addrp) NULL;
    int status;

    status = p1getn (infile, (int)sizeof(struct Addrblock), (char **) &addrp);

    if (status == EOF)
      err ("do_p1_addr:  Missing Addrp at end of file");
    else if (status == 0)
      err ("do_p1_addr:  Missing Addrp in p1 file");
    else if (addrp == (Addrp) NULL)
      err ("do_p1_addr:  Null addrp in p1 file");
    else if (addrp -> tag != TADDR)
      erri ("do_p1_addr: bad tag in p1 file '%d'", addrp -> tag);
    else {
      addrp -> vleng = do_format (infile, outfile);
      addrp -> memoffset = do_format (infile, outfile);
    }

    return (expptr) addrp;
} /* do_p1_addr */



 static void
#ifdef KR_headers
do_p1_subr_ret(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_subr_ret(FILE *infile, FILE *outfile)
#endif
{
    expptr retval;

    nice_printf (outfile, "return ");
    retval = do_format (infile, outfile);
    if (!multitype)
      if (retval)
            expr_out (outfile, retval);

    nice_printf (outfile, ";\n");
} /* do_p1_subr_ret */



 static void
#ifdef KR_headers
do_p1_comp_goto(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_comp_goto(FILE *infile, FILE *outfile)
#endif
{
    expptr index;
    expptr labels;

    index = do_format (infile, outfile);

    if (index == ENULL) {
      err ("do_p1_comp_goto:  no expression for computed goto");
      return;
    } /* if index == ENULL */

    labels = do_format (infile, outfile);

    if (labels && labels -> tag != TLIST)
      erri ("do_p1_comp_goto:  expected list, got tag '%d'", labels -> tag);
    else
      compgoto_out (outfile, index, labels);
} /* do_p1_comp_goto */


 static void
#ifdef KR_headers
do_p1_for(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_for(FILE *infile, FILE *outfile)
#endif
{
    expptr init, test, inc;

    init = do_format (infile, outfile);
    test = do_format (infile, outfile);
    inc = do_format (infile, outfile);

    out_for (outfile, init, test, inc);
} /* do_p1_for */

 static void
#ifdef KR_headers
do_p1_end_for(outfile)
      FILE *outfile;
#else
do_p1_end_for(FILE *outfile)
#endif
{
    out_end_for (outfile);
} /* do_p1_end_for */


 static void
#ifdef KR_headers
do_p1_fortran(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_fortran(FILE *infile, FILE *outfile)
#endif
{
      char buf[P1_STMTBUFSIZE];
      if (!p1gets(infile, buf, P1_STMTBUFSIZE))
            return;
      /* bypass nice_printf nonsense */
      fprintf(outfile, "/*< %s >*/\n", buf+1);  /* + 1 to skip by '$' */
      }


 static expptr
#ifdef KR_headers
do_p1_expr(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_expr(FILE *infile, FILE *outfile)
#endif
{
    int status;
    long opcode, type;
    struct Exprblock *result = (struct Exprblock *) NULL;

    status = p1getd (infile, &opcode);

    if (status == EOF)
      err ("do_p1_expr:  Missing expr opcode at end of file");
    else if (status == 0)
      err ("do_p1_expr:  Missing expr opcode in p1 file");
    else {

      status = p1getd (infile, &type);

      if (status == EOF)
          err ("do_p1_expr:  Missing expr type at end of file");
      else if (status == 0)
          err ("do_p1_expr:  Missing expr type in p1 file");
      else if (opcode == 0)
          return ENULL;
      else {
          result = ALLOC (Exprblock);

          result -> tag = TEXPR;
          result -> vtype = (field)type;
          result -> opcode = (unsigned int)opcode;
          result -> vleng = do_format (infile, outfile);

          if (is_unary_op (opcode))
            result -> leftp = do_format (infile, outfile);
          else if (is_binary_op (opcode)) {
            result -> leftp = do_format (infile, outfile);
            result -> rightp = do_format (infile, outfile);
          } else
            errl("do_p1_expr:  Illegal opcode %ld", opcode);
      } /* else */
    } /* else */

    return (expptr) result;
} /* do_p1_expr */


 static expptr
#ifdef KR_headers
do_p1_ident(infile)
      FILE *infile;
#else
do_p1_ident(FILE *infile)
#endif
{
      Addrp addrp;
      int status;
      long vtype, vstg;

      addrp = ALLOC (Addrblock);
      addrp -> tag = TADDR;

      status = p1getd (infile, &vtype);
      if (status == EOF)
          err ("do_p1_ident:  Missing identifier type at end of file\n");
      else if (status == 0 || vtype < 0 || vtype >= NTYPES)
          errl("do_p1_ident:  Bad type in intermediate file: %ld\n", vtype);
      else
          addrp -> vtype = (field)vtype;

      status = p1getd (infile, &vstg);
      if (status == EOF)
          err ("do_p1_ident:  Missing identifier storage at end of file\n");
      else if (status == 0 || vstg < 0 || vstg > STGNULL)
          errl("do_p1_ident:  Bad storage in intermediate file: %ld\n", vtype);
      else
          addrp -> vstg = (field)vstg;

      status = p1gets(infile, addrp->user.ident, IDENT_LEN);

      if (status == EOF)
          err ("do_p1_ident:  Missing ident string at end of file");
      else if (status == 0)
          err ("do_p1_ident:  Missing ident string in intermediate file");
      addrp->uname_tag = UNAM_IDENT;
      return (expptr) addrp;
} /* do_p1_ident */

 static expptr
#ifdef KR_headers
do_p1_charp(infile)
      FILE *infile;
#else
do_p1_charp(FILE *infile)
#endif
{
      Addrp addrp;
      int status;
      long vtype, vstg;
      char buf[64];

      addrp = ALLOC (Addrblock);
      addrp -> tag = TADDR;

      status = p1getd (infile, &vtype);
      if (status == EOF)
          err ("do_p1_ident:  Missing identifier type at end of file\n");
      else if (status == 0 || vtype < 0 || vtype >= NTYPES)
          errl("do_p1_ident:  Bad type in intermediate file: %ld\n", vtype);
      else
          addrp -> vtype = (field)vtype;

      status = p1getd (infile, &vstg);
      if (status == EOF)
          err ("do_p1_ident:  Missing identifier storage at end of file\n");
      else if (status == 0 || vstg < 0 || vstg > STGNULL)
          errl("do_p1_ident:  Bad storage in intermediate file: %ld\n", vtype);
      else
          addrp -> vstg = (field)vstg;

      status = p1gets(infile, buf, (int)sizeof(buf));

      if (status == EOF)
          err ("do_p1_ident:  Missing charp ident string at end of file");
      else if (status == 0)
          err ("do_p1_ident:  Missing charp ident string in intermediate file");
      addrp->uname_tag = UNAM_CHARP;
      addrp->user.Charp = strcpy(mem(strlen(buf)+1,0), buf);
      return (expptr) addrp;
}


 static expptr
#ifdef KR_headers
do_p1_extern(infile)
      FILE *infile;
#else
do_p1_extern(FILE *infile)
#endif
{
    Addrp addrp;

    addrp = ALLOC (Addrblock);
    if (addrp) {
      int status;

      addrp->tag = TADDR;
      addrp->vstg = STGEXT;
      addrp->uname_tag = UNAM_EXTERN;
      status = p1getd (infile, &(addrp -> memno));
      if (status == EOF)
          err ("do_p1_extern:  Missing memno at end of file");
      else if (status == 0)
          err ("do_p1_extern:  Missing memno in intermediate file");
      if (addrp->vtype = extsymtab[addrp->memno].extype)
            addrp->vclass = CLPROC;
    } /* if addrp */

    return (expptr) addrp;
} /* do_p1_extern */



 static expptr
#ifdef KR_headers
do_p1_head(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_head(FILE *infile, FILE *outfile)
#endif
{
    int status;
    int add_n_;
    long Class;
    char storage[256];

    status = p1getd (infile, &Class);
    if (status == EOF)
      err ("do_p1_head:  missing header class at end of file");
    else if (status == 0)
      err ("do_p1_head:  missing header class in p1 file");
    else {
      status = p1gets (infile, storage, (int)sizeof(storage));
      if (status == EOF || status == 0)
          storage[0] = '\0';
    } /* else */

    if (Class == CLPROC || Class == CLMAIN) {
      chainp lengths;

      add_n_ = nentry > 1;
      lengths = length_comp(entries, add_n_);

      if (!add_n_ && protofile && Class != CLMAIN)
            protowrite(protofile, proctype, storage, entries, lengths);

      if (Class == CLMAIN)
          nice_printf (outfile, "/* Main program */ int ");
      else
          nice_printf(outfile, "%s ", multitype ? "VOID"
                  : c_type_decl(proctype, 1));

      nice_printf(outfile, add_n_ ? "%s0_" : "%s", storage);
      if (!Ansi) {
            listargs(outfile, entries, add_n_, lengths);
            nice_printf (outfile, "\n");
            }
      list_arg_types (outfile, entries, lengths, add_n_, "\n");
      nice_printf (outfile, "{\n");
      frchain(&lengths);
      next_tab (outfile);
      strcpy(this_proc_name, storage);
      list_decls (outfile);

    } else if (Class == CLBLOCK)
        next_tab (outfile);
    else
      errl("do_p1_head: got class %ld", Class);

    return NULL;
} /* do_p1_head */


 static expptr
#ifdef KR_headers
do_p1_list(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_list(FILE *infile, FILE *outfile)
#endif
{
    long tag, type, count;
    int status;
    expptr result;

    status = p1getd (infile, &tag);
    if (status == EOF)
      err ("do_p1_list:  missing list tag at end of file");
    else if (status == 0)
      err ("do_p1_list:  missing list tag in p1 file");
    else {
      status = p1getd (infile, &type);
      if (status == EOF)
          err ("do_p1_list:  missing list type at end of file");
      else if (status == 0)
          err ("do_p1_list:  missing list type in p1 file");
      else {
          status = p1getd (infile, &count);
          if (status == EOF)
            err ("do_p1_list:  missing count at end of file");
          else if (status == 0)
            err ("do_p1_list:  missing count in p1 file");
      } /* else */
    } /* else */

    result = (expptr) ALLOC (Listblock);
    if (result) {
      chainp pointer;

      result -> tag = (field)tag;
      result -> listblock.vtype = (field)type;

/* Assume there will be enough data */

      if (count--) {
          pointer = result->listblock.listp =
            mkchain((char *)do_format(infile, outfile), CHNULL);
          while (count--) {
            pointer -> nextp =
                  mkchain((char *)do_format(infile, outfile), CHNULL);
            pointer = pointer -> nextp;
          } /* while (count--) */
      } /* if (count) */
    } /* if (result) */

    return result;
} /* do_p1_list */


 chainp
#ifdef KR_headers
length_comp(e, add_n)
      struct Entrypoint *e;
      int add_n;
#else
length_comp(struct Entrypoint *e, int add_n)
#endif
            /* get lengths of characters args */
{
      chainp lengths;
      chainp args, args1;
      Namep arg, np;
      int nchargs;
      Argtypes *at;
      Atype *a;
      extern int init_ac[TYSUBR+1];

      if (!e)
            return 0;   /* possible only with errors */
      args = args1 = add_n ? allargs : e->arglist;
      nchargs = 0;
      for (lengths = NULL; args; args = args -> nextp)
            if (arg = (Namep)args->datap) {
                  if (arg->vclass == CLUNKNOWN)
                        arg->vclass = CLVAR;
                  if (arg->vtype == TYCHAR && arg->vclass != CLPROC) {
                        lengths = mkchain((char *)arg, lengths);
                        nchargs++;
                        }
                  }
      if (!add_n && (np = e->enamep)) {
            /* one last check -- by now we know all we ever will
             * about external args...
             */
            save_argtypes(e->arglist, &e->entryname->arginfo,
                  &np->arginfo, 0, np->fvarname, STGEXT, nchargs,
                  np->vtype, 1);
            at = e->entryname->arginfo;
            a = at->atypes + init_ac[np->vtype];
            for(; args1; a++, args1 = args1->nextp) {
                  frchain(&a->cp);
                  if (arg = (Namep)args1->datap)
                      switch(arg->vclass) {
                        case CLPROC:
                              if (arg->vimpltype
                              && a->type >= 300)
                                    a->type = TYUNKNOWN + 200;
                              break;
                        case CLUNKNOWN:
                              a->type %= 100;
                        }
                  }
            }
      return revchain(lengths);
      }

 void
#ifdef KR_headers
listargs(outfile, entryp, add_n_, lengths)
      FILE *outfile;
      struct Entrypoint *entryp;
      int add_n_;
      chainp lengths;
#else
listargs(FILE *outfile, struct Entrypoint *entryp, int add_n_, chainp lengths)
#endif
{
      chainp args;
      char *s;
      Namep arg;
      int did_one = 0;

      nice_printf (outfile, "(");

      if (add_n_) {
            nice_printf(outfile, "n__");
            did_one = 1;
            args = allargs;
            }
      else {
            if (!entryp)
                  return;     /* possible only with errors */
            args = entryp->arglist;
            }

      if (multitype)
            {
            nice_printf(outfile, ", ret_val");
            did_one = 1;
            args = allargs;
            }
      else if (ONEOF(proctype, MSKCOMPLEX|MSKCHAR))
            {
            s = xretslot[proctype]->user.ident;
            nice_printf(outfile, did_one ? ", %s" : "%s",
                  *s == '(' /*)*/ ? "r_v" : s);
            did_one = 1;
            if (proctype == TYCHAR)
                  nice_printf (outfile, ", ret_val_len");
            }
      for (; args; args = args -> nextp)
            if (arg = (Namep)args->datap) {
                  nice_printf (outfile, "%s", did_one ? ", " : "");
                  out_name (outfile, arg);
                  did_one = 1;
                  }

      for (args = lengths; args; args = args -> nextp)
            nice_printf(outfile, ", %s",
                  new_arg_length((Namep)args->datap));
      nice_printf (outfile, ")");
} /* listargs */


 void
#ifdef KR_headers
list_arg_types(outfile, entryp, lengths, add_n_, finalnl)
      FILE *outfile;
      struct Entrypoint *entryp;
      chainp lengths;
      int add_n_;
      char *finalnl;
#else
list_arg_types(FILE *outfile, struct Entrypoint *entryp, chainp lengths, int add_n_, char *finalnl)
#endif
{
    chainp args;
    int last_type = -1, last_class = -1;
    int did_one = 0, done_one, is_ext;
    char *s, *sep = "", *sep1;

    if (outfile == (FILE *) NULL) {
      err ("list_arg_types:  null output file");
      return;
    } else if (entryp == (struct Entrypoint *) NULL) {
      err ("list_arg_types:  null procedure entry pointer");
      return;
    } /* else */

    if (Ansi) {
      done_one = 0;
      sep1 = ", ";
      nice_printf(outfile, "(" /*)*/);
      }
    else {
      done_one = 1;
      sep1 = ";\n";
      }
    args = entryp->arglist;
    if (add_n_) {
      nice_printf(outfile, "int n__");
      did_one = done_one;
      sep = sep1;
      args = allargs;
      }
    if (multitype) {
      nice_printf(outfile, "%sMultitype *ret_val", sep);
      did_one = done_one;
      sep = sep1;
      }
    else if (ONEOF (proctype, MSKCOMPLEX|MSKCHAR)) {
      s = xretslot[proctype]->user.ident;
      nice_printf(outfile, "%s%s *%s", sep, c_type_decl(proctype, 0),
                  *s == '(' /*)*/ ? "r_v" : s);
      did_one = done_one;
      sep = sep1;
      if (proctype == TYCHAR)
          nice_printf (outfile, "%sftnlen ret_val_len", sep);
    } /* if ONEOF proctype */
    for (; args; args = args -> nextp) {
      Namep arg = (Namep) args->datap;

/* Scalars are passed by reference, and arrays will have their lower bound
   adjusted, so nearly everything is printed with a star in front.  The
   exception is character lengths, which are passed by value. */

      if (arg) {
          int type = arg -> vtype, vclass = arg -> vclass;

          if (vclass == CLPROC)
            if (arg->vimpltype)
                  type = Castargs ? TYUNKNOWN : TYSUBR;
            else if (type == TYREAL && forcedouble && !Castargs)
                  type = TYDREAL;

          if (type == last_type && vclass == last_class && did_one)
            nice_printf (outfile, ", ");
          else
            if ((is_ext = vclass == CLPROC) && Castargs)
                  nice_printf(outfile, "%s%s ", sep,
                        usedcasts[type] = casttypes[type]);
            else
                  nice_printf(outfile, "%s%s ", sep,
                        c_type_decl(type, is_ext));
          if (vclass == CLPROC)
            if (Castargs)
                  out_name(outfile, arg);
            else {
                  nice_printf(outfile, "(*");
                  out_name(outfile, arg);
                  nice_printf(outfile, ") %s", parens);
                  }
          else {
            nice_printf (outfile, "*");
            out_name (outfile, arg);
            }

          last_type = type;
          last_class = vclass;
          did_one = done_one;
          sep = sep1;
      } /* if (arg) */
    } /* for args = entryp -> arglist */

    for (args = lengths; args; args = args -> nextp)
      nice_printf(outfile, "%sftnlen %s", sep,
                  new_arg_length((Namep)args->datap));
    if (did_one)
      nice_printf (outfile, ";\n");
    else if (Ansi)
      nice_printf(outfile,
            /*((*/ sep != sep1 && Ansi == 1 ? "void)%s" : ")%s",
            finalnl);
} /* list_arg_types */

 static void
#ifdef KR_headers
write_formats(outfile)
      FILE *outfile;
#else
write_formats(FILE *outfile)
#endif
{
      register struct Labelblock *lp;
      int first = 1;
      char *fs;

      for(lp = labeltab ; lp < highlabtab ; ++lp)
            if (lp->fmtlabused) {
                  if (first) {
                        first = 0;
                        nice_printf(outfile, "/* Format strings */\n");
                        }
                  nice_printf(outfile, "static char fmt_%ld[] = \"",
                        lp->stateno);
                  if (!(fs = lp->fmtstring))
                        fs = "";
                  nice_printf(outfile, "%s\";\n", fs);
                  }
      if (!first)
            nice_printf(outfile, "\n");
      }

 static void
#ifdef KR_headers
write_ioblocks(outfile)
      FILE *outfile;
#else
write_ioblocks(FILE *outfile)
#endif
{
      register iob_data *L;
      register char *f, **s, *sep;

      nice_printf(outfile, "/* Fortran I/O blocks */\n");
      L = iob_list = (iob_data *)revchain((chainp)iob_list);
      do {
            nice_printf(outfile, "static %s %s = { ",
                  L->type, L->name);
            sep = 0;
            for(s = L->fields; f = *s; s++) {
                  if (sep)
                        nice_printf(outfile, sep);
                  sep = ", ";
                  if (*f == '"') {  /* kludge */
                        nice_printf(outfile, "\"");
                        nice_printf(outfile, "%s\"", f+1);
                        }
                  else
                        nice_printf(outfile, "%s", f);
                  }
            nice_printf(outfile, " };\n");
            }
            while(L = L->next);
      nice_printf(outfile, "\n\n");
      }

 static void
#ifdef KR_headers
write_assigned_fmts(outfile)
      FILE *outfile;
#else
write_assigned_fmts(FILE *outfile)
#endif
{
      register chainp cp;
      Namep np;
      char *comma, *type;
      int did_one = 0;

      cp = assigned_fmts = revchain(assigned_fmts);
      nice_printf(outfile, "/* Assigned format variables */\n");
      do {
            np = (Namep)cp->datap;
            if (did_one == np->vstg) {
                  comma = ", ";
                  type = "";
                  }
            else {
                  comma = (char*)(did_one ? ";\n" : "");
                  type = (char*)(np->vstg == STGAUTO
                                    ? "char " : "static char ");
                  did_one = np->vstg;
                  }
            nice_printf(outfile, "%s%s*%s_fmt", comma, type, np->fvarname);
            }
            while(cp = cp->nextp);
      nice_printf(outfile, ";\n\n");
      }

 static char *
#ifdef KR_headers
to_upper(s)
      register char *s;
#else
to_upper(register char *s)
#endif
{
      static char buf[64];
      register char *t = buf;
      register int c;
      while(*t++ = (c = *s++) >= 'a' && c <= 'z' ? c + 'A' - 'a' : c);
      return buf;
      }


/* This routine creates static structures representing a namelist.
   Declarations of the namelist and related structures are:

      struct Vardesc {
            char *name;
            char *addr;
            ftnlen *dims;     *//* laid out as struct dimensions below *//*
            int  type;
            };
      typedef struct Vardesc Vardesc;

      struct Namelist {
            char *name;
            Vardesc **vars;
            int nvars;
            };

      struct dimensions
            {
            ftnlen numberofdimensions;
            ftnlen numberofelements
            ftnlen baseoffset;
            ftnlen span[numberofdimensions-1];
            };

   If dims is not null, then the corner element of the array is at
   addr.  However,  the element with subscripts (i1,...,in) is at
   addr + sizeoftype * (i1+span[0]*(i2+span[1]*...) - dimp->baseoffset)
*/

 static void
#ifdef KR_headers
write_namelists(nmch, outfile)
      chainp nmch;
      FILE *outfile;
#else
write_namelists(chainp nmch, FILE *outfile)
#endif
{
      Namep var;
      struct Hashentry *entry;
      struct Dimblock *dimp;
      int i, nd, type;
      char *comma, *name;
      register chainp q;
      register Namep v;

      nice_printf(outfile, "/* Namelist stuff */\n\n");
      for (entry = hashtab; entry < lasthash; ++entry) {
            if (!(v = entry->varp) || !v->vnamelist)
                  continue;
            type = v->vtype;
            name = v->cvarname;
            if (dimp = v->vdim) {
                  nd = dimp->ndim;
                  nice_printf(outfile,
                        "static ftnlen %s_dims[] = { %d, %ld, %ld",
                        name, nd,
                        dimp->nelt->constblock.Const.ci,
                        dimp->baseoffset->constblock.Const.ci);
                  for(i = 0, --nd; i < nd; i++)
                        nice_printf(outfile, ", %ld",
                          dimp->dims[i].dimsize->constblock.Const.ci);
                  nice_printf(outfile, " };\n");
                  }
            nice_printf(outfile, "static Vardesc %s_dv = { \"%s\", %s",
                  name, to_upper(v->fvarname),
                  type == TYCHAR ? ""
                        : (dimp || oneof_stg(v,v->vstg,
                              M(STGEQUIV)|M(STGCOMMON)))
                        ? "(char *)" : "(char *)&");
            out_name(outfile, v);
            nice_printf(outfile, dimp ? ", %s_dims" : ", (ftnlen *)0", name);
            nice_printf(outfile, ", %ld };\n",
                  type != TYCHAR  ? (long)typeconv[type]
                              : -v->vleng->constblock.Const.ci);
            }

      do {
            var = (Namep)nmch->datap;
            name = var->cvarname;
            nice_printf(outfile, "\nstatic Vardesc *%s_vl[] = ", name);
            comma = "{";
            i = 0;
            for(q = var->varxptr.namelist ; q ; q = q->nextp) {
                  v = (Namep)q->datap;
                  if (!v->vnamelist)
                        continue;
                  i++;
                  nice_printf(outfile, "%s &%s_dv", comma, v->cvarname);
                  comma = ",";
                  }
            nice_printf(outfile, " };\n");
            nice_printf(outfile,
                  "static Namelist %s = { \"%s\", %s_vl, %d };\n",
                  name, to_upper(var->fvarname), name, i);
            }
            while(nmch = nmch->nextp);
      nice_printf(outfile, "\n");
      }

/* fixextype tries to infer from usage in previous procedures
   the type of an external procedure declared
   external and passed as an argument but never typed or invoked.
 */

 static int
#ifdef KR_headers
fixexttype(var)
      Namep var;
#else
fixexttype(Namep var)
#endif
{
      Extsym *e;
      int type, type1;

      type = var->vtype;
      e = &extsymtab[var->vardesc.varno];
      if ((type1 = e->extype) && type == TYUNKNOWN)
            return var->vtype = type1;
      if (var->visused) {
            if (e->exused && type != type1)
                  changedtype(var);
            e->exused = 1;
            e->extype = type;
            }
      return type;
      }

 static void
#ifdef KR_headers
ref_defs(outfile, refdefs)
      FILE *outfile;
      chainp refdefs;
#else
ref_defs(FILE *outfile, chainp refdefs)
#endif
{
      chainp cp;
      int eb, i, j, n;
      struct Dimblock *dimp;
      expptr b, vl;
      Namep var;
      char *amp, *comma;

      margin_printf(outfile, "\n");
      for(cp = refdefs = revchain(refdefs); cp; cp = cp->nextp) {
            var = (Namep)cp->datap;
            cp->datap = 0;
            amp = "_subscr";
            if (!(eb = var->vsubscrused)) {
                  var->vrefused = 0;
                  if (!ISCOMPLEX(var->vtype))
                        amp = "_ref";
                  }
            def_start(outfile, var->cvarname, amp, CNULL);
            dimp = var->vdim;
            vl = 0;
            comma = "(";
            amp = "";
            if (var->vtype == TYCHAR) {
                  amp = "&";
                  vl = var->vleng;
                  if (ISCONST(vl) && vl->constblock.Const.ci == 1)
                        vl = 0;
                  nice_printf(outfile, "%sa_0", comma);
                  comma = ",";
                  }
            n = dimp->ndim;
            for(i = 1; i <= n; i++, comma = ",")
                  nice_printf(outfile, "%sa_%d", comma, i);
            nice_printf(outfile, ") %s", amp);
            if (var->vsubscrused)
                  var->vsubscrused = 0;
            else if (!ISCOMPLEX(var->vtype)) {
                  out_name(outfile, var);
                  nice_printf(outfile, "[%s", vl ? "(" : "");
                  }
            for(j = 2; j < n; j++)
                  nice_printf(outfile, "(");
            while(--i > 1) {
                  nice_printf(outfile, "(a_%d)%s*", i, i == n ? "" : ")");
                  expr_out(outfile, cpexpr(dimp->dims[i-2].dimsize));
                  nice_printf(outfile, " + ");
                  }
            nice_printf(outfile, "a_1");
            if (var->vtype == TYCHAR) {
                  if (vl) {
                        nice_printf(outfile, ")*");
                        expr_out(outfile, cpexpr(vl));
                        }
                  nice_printf(outfile, " + a_0");
                  }
            if ((var->vstg != STGARG /* || checksubs */ )
             && (b = dimp->baseoffset)) {
                  b = cpexpr(b);
                  if (var->vtype == TYCHAR)
                        b = mkexpr(OPSTAR, cpexpr(var->vleng), b);
                  nice_printf(outfile, " - ");
                  expr_out(outfile, b);
                  }
            if (ISCOMPLEX(var->vtype)) {
                  margin_printf(outfile, "\n");
                  def_start(outfile, var->cvarname, "_ref", CNULL);
                  comma = "(";
                  for(i = 1; i <= n; i++, comma = ",")
                        nice_printf(outfile, "%sa_%d", comma, i);
                  nice_printf(outfile, ") %s[%s_subscr",
                        var->cvarname, var->cvarname);
                  comma = "(";
                  for(i = 1; i <= n; i++, comma = ",")
                        nice_printf(outfile, "%sa_%d", comma, i);
                  nice_printf(outfile, ")");
                  }
            margin_printf(outfile, "]\n" + eb);
            }
      nice_printf(outfile, "\n");
      frchain(&refdefs);
      }

 static long
#ifdef KR_headers
n_elt(vd) struct Dimblock *vd;
#else
n_elt(struct Dimblock *vd)
#endif
{
      expptr ne;
      long nv = 1;
      if (vd) {
            if (!(ne = vd->nelt))
                  Fatal("Null nelt in n_elt");
            if (ne->tag != TCONST)
                  fatali("Unexpected nelt tag %d in n_elt", ne->tag);
            if (!ISINT(ne->constblock.vtype))
                  fatali("Unexpected vtype %d in n_elt",
                        ne->constblock.vtype);
            nv = ne->constblock.Const.ci;
            }
      return nv;
      }

 void
#ifdef KR_headers
list_decls(outfile)
      FILE *outfile;
#else
list_decls(FILE *outfile)
#endif
{
    extern chainp used_builtins;
    extern struct Hashentry *hashtab;
    struct Hashentry *entry;
    int write_header = 1;
    int last_class = -1, last_stg = -1;
    Namep var;
    int Alias, Define, did_one, last_type, stg, type;
    extern int def_equivs, useauto;
    extern chainp new_vars;   /* Compiler-generated locals */
    chainp namelists = 0, refdefs = 0;
    char *ctype;
    int useauto1 = useauto && !saveall;
    long x;
    extern int hsize;

/* First write out the statically initialized data */

    if (initfile)
      list_init_data(&initfile, initfname, outfile);

/* Next come formats */
    write_formats(outfile);

/* Now write out the system-generated identifiers */

    if (new_vars || nequiv) {
      chainp args, next_var, this_var;
      chainp nv[TYVOID], nv1[TYVOID];
      int i, j;
      ftnint k;
      Addrp Var;
      Namep arg;

      /* zap unused dimension variables */

      for(args = allargs; args; args = args->nextp) {
            arg = (Namep)args->datap;
            if (this_var = arg->vlastdim) {
                  frexpr((tagptr)this_var->datap);
                  this_var->datap = 0;
                  }
            }

      /* sort new_vars by type, skipping entries just zapped */

      for(i = TYADDR; i < TYVOID; i++)
            nv[i] = 0;
      for(this_var = new_vars; this_var; this_var = next_var) {
            next_var = this_var->nextp;
            if (Var = (Addrp)this_var->datap) {
                  if (!(this_var->nextp = nv[j = Var->vtype]))
                        nv1[j] = this_var;
                  nv[j] = this_var;
                  }
            else {
                  this_var->nextp = 0;
                  frchain(&this_var);
                  }
            }
      new_vars = 0;
      for(i = TYVOID; --i >= TYADDR;)
            if (this_var = nv[i]) {
                  nv1[i]->nextp = new_vars;
                  new_vars = this_var;
                  }

      /* write the declarations */

      did_one = 0;
      last_type = -1;

      for (this_var = new_vars; this_var; this_var = this_var -> nextp) {
          Var = (Addrp) this_var->datap;

          if (Var == (Addrp) NULL)
            err ("list_decls:  null variable");
          else if (Var -> tag != TADDR)
            erri ("list_decls:  bad tag on new variable '%d'",
                  Var -> tag);

          type = nv_type (Var);
          if (Var->vstg == STGINIT
          ||  Var->uname_tag == UNAM_IDENT
                  && *Var->user.ident == ' '
                  && multitype)
            continue;
          if (!did_one)
            nice_printf (outfile, "/* System generated locals */\n");

          if (last_type == type && did_one)
            nice_printf (outfile, ", ");
          else {
            if (did_one)
                nice_printf (outfile, ";\n");
            nice_printf (outfile, "%s ",
                  c_type_decl (type, Var -> vclass == CLPROC));
          } /* else */

/* Character type is really a string type.  Put out a '*' for parameters
   with unknown length and functions returning character */

          if (Var -> vtype == TYCHAR && (!ISICON ((Var -> vleng))
                || Var -> vclass == CLPROC))
            nice_printf (outfile, "*");

          write_nv_ident(outfile, (Addrp)this_var->datap);
          if (Var -> vtype == TYCHAR && Var->vclass != CLPROC &&
                ISICON((Var -> vleng))
                  && (k = Var->vleng->constblock.Const.ci) > 0)
            nice_printf (outfile, "[%ld]", (long)k);

          did_one = 1;
          last_type = nv_type (Var);
      } /* for this_var */

/* Handle the uninitialized equivalences */

      do_uninit_equivs (outfile, &did_one);

      if (did_one)
          nice_printf (outfile, ";\n\n");
    } /* if new_vars */

/* Write out builtin declarations */

    if (used_builtins) {
      chainp cp;
      Extsym *es;

      last_type = -1;
      did_one = 0;

      nice_printf (outfile, "/* Builtin functions */");

      for (cp = used_builtins; cp; cp = cp -> nextp) {
          Addrp e = (Addrp)cp->datap;

          switch(type = e->vtype) {
            case TYDREAL:
            case TYREAL:
                  /* if (forcedouble || e->dbl_builtin) */
                  /* libF77 currently assumes everything double */
                  type = TYDREAL;
                  ctype = "double";
                  break;
            case TYCOMPLEX:
            case TYDCOMPLEX:
                  type = TYVOID;
                  /* no break */
            default:
                  ctype = c_type_decl(type, 0);
            }

          if (did_one && last_type == type)
            nice_printf(outfile, ", ");
          else
            nice_printf(outfile, "%s\n%s ", did_one ? ";" : "", ctype);

          extern_out(outfile, es = &extsymtab[e -> memno]);
          proto(outfile, es->arginfo, es->fextname);
          last_type = type;
          did_one = 1;
      } /* for cp = used_builtins */

      nice_printf (outfile, ";\n\n");
    } /* if used_builtins */

    last_type = -1;
    for (entry = hashtab; entry < lasthash; ++entry) {
      var = entry -> varp;

      if (var) {
          int procclass = var -> vprocclass;
          char *comment = NULL;
          int vclass = var -> vclass;
          stg = var -> vstg;
          type = var -> vtype;

          if (var->vrefused)
            refdefs = mkchain((char *)var, refdefs);
          if (var->vsubscrused)
            if (ISCOMPLEX(var->vtype))
                  var->vsubscrused = 0;
            else
                  refdefs = mkchain((char *)var, refdefs);
          if (ONEOF(stg, M(STGARG)|M(STGLENG)|M(STGINIT)))
            continue;

          if (useauto1 && stg == STGBSS && !var->vsave)
            stg = STGAUTO;

          switch (vclass) {
              case CLVAR:
                break;
            case CLPROC:
                switch(procclass) {
                  case PTHISPROC:
                        extsymtab[var->vardesc.varno].extype = type;
                        continue;
                  case PSTFUNCT:
                  case PINTRINSIC:
                        continue;
                  case PUNKNOWN:
                        err ("list_decls:  unknown procedure class");
                        continue;
                  case PEXTERNAL:
                        if (stg == STGUNKNOWN) {
                              warn1(
                              "%.64s declared EXTERNAL but never used.",
                                    var->fvarname);
                              /* to retain names declared EXTERNAL */
                              /* but not referenced, change */
                              /* "continue" to "stg = STGEXT" */
                              continue;
                              }
                        else
                              type = fixexttype(var);
                  }
                break;
            case CLUNKNOWN:
                  /* declared but never used */
                  continue;
            case CLPARAM:
                  continue;
            case CLNAMELIST:
                  if (var->visused)
                        namelists = mkchain((char *)var, namelists);
                  continue;
            default:
                erri("list_decls:  can't handle class '%d' yet",
                      vclass);
                Fatal(var->fvarname);
                continue;
          } /* switch */

          /* Might be equivalenced to a common.  If not, don't process */
          if (stg == STGCOMMON && !var->vcommequiv)
            continue;

/* Only write the header if system-generated locals, builtins, or
   uninitialized equivs were already output */

          if (write_header == 1 && (new_vars || nequiv || used_builtins)
                && oneof_stg ( var, stg,
                M(STGBSS)|M(STGEXT)|M(STGAUTO)|M(STGCOMMON)|M(STGEQUIV))) {
            nice_printf (outfile, "/* Local variables */\n");
            write_header = 2;
            }


          Alias = oneof_stg(var, stg, M(STGEQUIV)|M(STGCOMMON));
          if (Define = (Alias && def_equivs)) {
            if (!write_header)
                  nice_printf(outfile, ";\n");
            def_start(outfile, var->cvarname, CNULL, "(");
            goto Alias1;
            }
          else if (type == last_type && vclass == last_class &&
                stg == last_stg && !write_header)
            nice_printf (outfile, ", ");
          else {
            if (!write_header && ONEOF(stg, M(STGBSS)|
                M(STGEXT)|M(STGAUTO)|M(STGEQUIV)|M(STGCOMMON)))
                nice_printf (outfile, ";\n");

            switch (stg) {
                case STGARG:
                case STGLENG:
                  /* Part of the argument list, don't write them out
                     again */
                  continue;       /* Go back to top of the loop */
                case STGBSS:
                case STGEQUIV:
                case STGCOMMON:
                  nice_printf (outfile, "static ");
                  break;
                case STGEXT:
                  nice_printf (outfile, "extern ");
                  break;
                case STGAUTO:
                  break;
                case STGINIT:
                case STGUNKNOWN:
                  /* Don't want to touch the initialized data, that will
                     be handled elsewhere.  Unknown data have
                     already been complained about, so skip them */
                  continue;
                default:
                  erri("list_decls:  can't handle storage class %d",
                        stg);
                  continue;
            } /* switch */

            if (type == TYCHAR && halign && vclass != CLPROC
            && ISICON(var->vleng)) {
                  nice_printf(outfile, "struct { %s fill; char val",
                        halign);
                  x = wr_char_len(outfile, var->vdim,
                        var->vleng->constblock.Const.ci, 1);
                  if (x %= hsize)
                        nice_printf(outfile, "; char fill2[%ld]",
                              hsize - x);
                  nice_printf(outfile, "; } %s_st;\n", var->cvarname);
                  def_start(outfile, var->cvarname, CNULL, var->cvarname);
                  margin_printf(outfile, "_st.val\n");
                  last_type = -1;
                  write_header = 2;
                  continue;
                  }
            nice_printf(outfile, "%s ",
                  c_type_decl(type, vclass == CLPROC));
          } /* else */

/* Character type is really a string type.  Put out a '*' for variable
   length strings, and also for equivalences */

          if (type == TYCHAR && vclass != CLPROC
                && (!var->vleng || !ISICON (var -> vleng))
          || oneof_stg(var, stg, M(STGEQUIV)|M(STGCOMMON)))
            nice_printf (outfile, "*%s", var->cvarname);
          else {
            nice_printf (outfile, "%s", var->cvarname);
            if (vclass == CLPROC) {
                  Argtypes *at;
                  if (!(at = var->arginfo)
                   && var->vprocclass == PEXTERNAL)
                        at = extsymtab[var->vardesc.varno].arginfo;
                  proto(outfile, at, var->fvarname);
                  }
            else if (type == TYCHAR && ISICON ((var -> vleng)))
                  wr_char_len(outfile, var->vdim,
                        var->vleng->constblock.Const.ci, 0);
            else if (var -> vdim &&
                !oneof_stg (var, stg, M(STGEQUIV)|M(STGCOMMON)))
                  comment = wr_ardecls(outfile, var->vdim, 1L);
            }

          if (comment)
            nice_printf (outfile, "%s", comment);
 Alias1:
          if (Alias) {
            char *amp, *lp, *name, *rp;
            ftnint voff = var -> voffset;
            int et0, expr_type, k;
            Extsym *E;
            struct Equivblock *eb;
            char buf[16];

/* We DON'T want to use oneof_stg here, because we need to distinguish
   between them */

            if (stg == STGEQUIV) {
                  name = equiv_name(k = var->vardesc.varno, CNULL);
                  eb = eqvclass + k;
                  if (eb->eqvinit) {
                        amp = "&";
                        et0 = TYERROR;
                        }
                  else {
                        amp = "";
                        et0 = eb->eqvtype;
                        }
                  expr_type = et0;
                }
            else {
                  E = &extsymtab[var->vardesc.varno];
                  sprintf(name = buf, "%s%d", E->cextname, E->curno);
                  expr_type = type;
                  et0 = -1;
                  amp = "&";
            } /* else */

            if (!Define)
                  nice_printf (outfile, " = ");
            if (voff) {
                  k = typesize[type];
                  switch((int)(voff % k)) {
                        case 0:
                              voff /= k;
                              expr_type = type;
                              break;
                        case SZSHORT:
                        case SZSHORT+SZLONG:
                              expr_type = TYSHORT;
                              voff /= SZSHORT;
                              break;
                        case SZLONG:
                              expr_type = TYLONG;
                              voff /= SZLONG;
                              break;
                        default:
                              expr_type = TYCHAR;
                        }
                  }

            if (expr_type == type) {
                  lp = rp = "";
                  if (et0 == -1 && !voff)
                        goto cast;
                  }
            else {
                  lp = "(";
                  rp = ")";
 cast:
                  nice_printf(outfile, "(%s *)", c_type_decl(type, 0));
                  }

/* Now worry about computing the offset */

            if (voff) {
                if (expr_type == et0)
                  nice_printf (outfile, "%s%s + %ld%s",
                        lp, name, voff, rp);
                else
                  nice_printf(outfile, "%s(%s *)%s%s + %ld%s", lp,
                        c_type_decl (expr_type, 0), amp,
                        name, voff, rp);
            } else
                nice_printf(outfile, "%s%s", amp, name);
/* Always put these at the end of the line */
            last_type = last_class = last_stg = -1;
            write_header = 0;
            if (Define) {
                  margin_printf(outfile, ")\n");
                  write_header = 2;
                  }
            continue;
            }
          write_header = 0;
          last_type = type;
          last_class = vclass;
          last_stg = stg;
      } /* if (var) */
    } /* for (entry = hashtab */

    if (!write_header)
      nice_printf (outfile, ";\n\n");
    else if (write_header == 2)
      nice_printf(outfile, "\n");

/* Next, namelists, which may reference equivs */

    if (namelists) {
      write_namelists(namelists = revchain(namelists), outfile);
      frchain(&namelists);
      }

/* Finally, ioblocks (which may reference equivs and namelists) */
    if (iob_list)
      write_ioblocks(outfile);
    if (assigned_fmts)
      write_assigned_fmts(outfile);

    if (refdefs)
      ref_defs(outfile, refdefs);

    if (trapuv) {
      for (entry = hashtab; entry < lasthash; ++entry)
          if ((var = entry->varp)
            && ONEOF(var->vstg, M(STGAUTO)|M(STGBSS))
            && ISNUMERIC(var->vtype)
            && var->vclass == CLVAR
            && !var->vsave)
                  nice_printf(outfile, "_uninit_f2c(&%s,%d,%ldL);\n",
                        var->cvarname, typeconv[var->vtype],
                        n_elt(var->vdim));
      }

} /* list_decls */

 void
#ifdef KR_headers
do_uninit_equivs(outfile, did_one)
      FILE *outfile;
      int *did_one;
#else
do_uninit_equivs(FILE *outfile, int *did_one)
#endif
{
    extern int nequiv;
    struct Equivblock *eqv, *lasteqv = eqvclass + nequiv;
    int k, last_type = -1, t;

    for (eqv = eqvclass; eqv < lasteqv; eqv++)
      if (!eqv -> eqvinit && eqv -> eqvtop != eqv -> eqvbottom) {
          if (!*did_one)
            nice_printf (outfile, "/* System generated locals */\n");
          t = eqv->eqvtype;
          if (last_type == t)
            nice_printf (outfile, ", ");
          else {
            if (*did_one)
                nice_printf (outfile, ";\n");
            nice_printf (outfile, "static %s ", c_type_decl(t, 0));
            k = typesize[t];
          } /* else */
          nice_printf(outfile, "%s", equiv_name((int)(eqv - eqvclass), CNULL));
          nice_printf(outfile, "[%ld]",
            (eqv->eqvtop - eqv->eqvbottom + k - 1) / k);
          last_type = t;
          *did_one = 1;
      } /* if !eqv -> eqvinit */
} /* do_uninit_equivs */


/* wr_ardecls -- Writes the brackets and size for an array
   declaration.  Because of the inner workings of the compiler,
   multi-dimensional arrays get mapped directly into a one-dimensional
   array, so we have to compute the size of the array here.  When the
   dimension is greater than 1, a string comment about the original size
   is returned */

 char *
#ifdef KR_headers
wr_ardecls(outfile, dimp, size)
      FILE *outfile;
      struct Dimblock *dimp;
      long size;
#else
wr_ardecls(FILE *outfile, struct Dimblock *dimp, long size)
#endif
{
    int i, k;
    ftnint j;
    static char buf[1000];

    if (dimp == (struct Dimblock *) NULL)
      return NULL;

    sprintf(buf, "\t/* was ");      /* would like to say  k = sprintf(...), but */
    k = strlen(buf);          /* BSD doesn't return char transmitted count */

    for (i = 0; i < dimp -> ndim; i++) {
      expptr this_size = dimp -> dims[i].dimsize;

      if (ISCONST(this_size)) {
            if (ISINT(this_size->constblock.vtype))
                  j = this_size -> constblock.Const.ci;
            else if (ISREAL(this_size->constblock.vtype))
                  j = (ftnint)this_size -> constblock.Const.cd[0];
            else
                  goto non_const;
            size *= j;
            sprintf(buf+k, "[%ld]", j);
            k += strlen(buf+k);
            /* BSD prevents getting strlen from sprintf */
            }
      else {
 non_const:
          err ("wr_ardecls:  nonconstant array size");
            }
    } /* for i = 0 */

    nice_printf (outfile, "[%ld]", size);
    strcat(buf+k, " */");

    return (i > 1) ? buf : NULL;
} /* wr_ardecls */



/* ----------------------------------------------------------------------

      The following routines read from the p1 intermediate file.  If
   that format changes, only these routines need be changed

   ---------------------------------------------------------------------- */

 static int
#ifdef KR_headers
get_p1_token(infile)
      FILE *infile;
#else
get_p1_token(FILE *infile)
#endif
{
    int token = P1_UNKNOWN;

/* NOT PORTABLE!! */

    if (fscanf (infile, "%d", &token) == EOF)
      return P1_EOF;

/* Skip over the ": " */

    if (getc (infile) != '\n')
      getc (infile);

    return token;
} /* get_p1_token */



/* Returns a (null terminated) string from the input file */

 static int
#ifdef KR_headers
p1gets(fp, str, size)
      FILE *fp;
      char *str;
      int size;
#else
p1gets(FILE *fp, char *str, int size)
#endif
{
    char c;

    if (str == NULL)
      return 0;

    if ((c = getc (fp)) != ' ')
      ungetc (c, fp);

    if (fgets (str, size, fp)) {
      int length;

      str[size - 1] = '\0';
      length = strlen (str);

/* Get rid of the newline */

      if (str[length - 1] == '\n')
          str[length - 1] = '\0';
      return 1;

    } else if (feof (fp))
      return EOF;
    else
      return 0;
} /* p1gets */


#ifndef NO_LONG_LONG
 static int
#ifdef KR_headers
p1getq(infile, result) FILE *infile; Llong *result;
#else
p1getq(FILE *infile, Llong *result)
#endif
{
      return fscanf(infile, "%llx", result);
      }
#endif

 static int
#ifdef KR_headers
p1get_const(infile, type, resultp)
      FILE *infile;
      int type;
      struct Constblock **resultp;
#else
p1get_const(FILE *infile, int type, struct Constblock **resultp)
#endif
{
    int status;
    struct Constblock *result;

      if (type != TYCHAR) {
            *resultp = result = ALLOC(Constblock);
            result -> tag = TCONST;
            result -> vtype = type;
            }

    switch (type) {
      case TYINT1:
        case TYSHORT:
      case TYLONG:
      case TYLOGICAL:
      case TYLOGICAL1:
      case TYLOGICAL2:
          status = p1getd (infile, &(result -> Const.ci));
          break;
#ifndef NO_LONG_LONG
      case TYQUAD:
            status = p1getq(infile, &result->Const.cq);
            break;
#endif
      case TYREAL:
      case TYDREAL:
          status = p1getf(infile, &result->Const.cds[0]);
          result->vstg = 1;
          break;
      case TYCOMPLEX:
      case TYDCOMPLEX:
          status = p1getf(infile, &result->Const.cds[0]);
          if (status && status != EOF)
            status = p1getf(infile, &result->Const.cds[1]);
          result->vstg = 1;
          break;
      case TYCHAR:
          status = fscanf(infile, "%lx", resultp);
          break;
      default:
          erri ("p1get_const:  bad constant type '%d'", type);
          status = 0;
          break;
    } /* switch */

    return status;
} /* p1get_const */

 static int
#ifdef KR_headers
p1getd(infile, result)
      FILE *infile;
      long *result;
#else
p1getd(FILE *infile, long *result)
#endif
{
    return fscanf (infile, "%ld", result);
} /* p1getd */

 static int
#ifdef KR_headers
p1getf(infile, result)
      FILE *infile;
      char **result;
#else
p1getf(FILE *infile, char **result)
#endif
{

      char buf[1324];
      register int k;

      k = fscanf (infile, "%s", buf);
      if (k < 1)
            k = EOF;
      else
            strcpy(*result = mem(strlen(buf)+1,0), buf);
      return k;
}

 static int
#ifdef KR_headers
p1getn(infile, count, result)
      FILE *infile;
      int count;
      char **result;
#else
p1getn(FILE *infile, int count, char **result)
#endif
{

    char *bufptr;

    bufptr = (char *) ckalloc (count);

    if (result)
      *result = bufptr;

    for (; !feof (infile) && count > 0; count--)
      *bufptr++ = getc (infile);

    return feof (infile) ? EOF : 1;
} /* p1getn */

 static void
#ifdef KR_headers
proto(outfile, at, fname)
      FILE *outfile;
      Argtypes *at;
      char *fname;
#else
proto(FILE *outfile,  Argtypes *at,  char *fname)
#endif
{
      int i, j, k, n;
      char *comma;
      Atype *atypes;
      Namep np;
      chainp cp;

      if (at) {
            /* Correct types that we learn on the fly, e.g.
                  subroutine gotcha(foo)
                  external foo
                  call zap(...,foo,...)
                  call foo(...)
            */
            atypes = at->atypes;
            n = at->defined ? at->dnargs : at->nargs;
            for(i = 0; i++ < n; atypes++) {
                  if (!(cp = atypes->cp))
                        continue;
                  j = atypes->type;
                  do {
                        np = (Namep)cp->datap;
                        k = np->vtype;
                        if (np->vclass == CLPROC) {
                              if (!np->vimpltype && k)
                                    k += 200;
                              else {
                                    if (j >= 300)
                                          j = TYUNKNOWN + 200;
                                    continue;
                                    }
                              }
                        if (j == k)
                              continue;
                        if (j >= 300
                        ||  j == 200 && k >= 200)
                              j = k;
                        else {
                              if (at->nargs >= 0)
                                 bad_atypes(at,fname,i,j,k,""," and");
                              goto break2;
                              }
                        }
                        while(cp = cp->nextp);
                  atypes->type = j;
                  frchain(&atypes->cp);
                  }
            }
 break2:
      if (parens) {
            nice_printf(outfile, parens);
            return;
            }

      if (!at || (n = at-> defined ? at->dnargs : at->nargs) < 0) {
            nice_printf(outfile, Ansi == 1 ? "()" : "(...)");
            return;
            }

      if (n == 0) {
            nice_printf(outfile, Ansi == 1 ? "(void)" : "()");
            return;
            }

      atypes = at->atypes;
      nice_printf(outfile, "(");
      comma = "";
      for(; --n >= 0; atypes++) {
            k = atypes->type;
            if (k == TYADDR)
                  nice_printf(outfile, "%schar **", comma);
            else if (k >= 200) {
                  k -= 200;
                  if (k >= 100)
                        k -= 100;
                  nice_printf(outfile, "%s%s", comma,
                        usedcasts[k] = casttypes[k]);
                  }
            else if (k >= 100)
                  nice_printf(outfile,
                              k == TYCHAR + 100 ? "%s%s *" : "%s%s",
                              comma, c_type_decl(k-100, 0));
            else
                  nice_printf(outfile, "%s%s *", comma,
                              c_type_decl(k, 0));
            comma = ", ";
            }
      nice_printf(outfile, ")");
      }

 void
#ifdef KR_headers
protowrite(protofile, type, name, e, lengths)
      FILE *protofile;
      int type;
      char *name;
      struct Entrypoint *e;
      chainp lengths;
#else
protowrite(FILE *protofile, int type, char *name, struct Entrypoint *e, chainp lengths)
#endif
{
      extern char used_rets[];
      int asave;

      if (!(asave = Ansi))
            Castargs = Ansi = 1;
      nice_printf(protofile, "extern %s %s", protorettypes[type], name);
      list_arg_types(protofile, e, lengths, 0, ";\n");
      used_rets[type] = 1;
      if (!(Ansi = asave))
            Castargs = 0;
      }

 static void
#ifdef KR_headers
do_p1_1while(outfile)
      FILE *outfile;
#else
do_p1_1while(FILE *outfile)
#endif
{
      if (*wh_next) {
            nice_printf(outfile,
                  "for(;;) { /* while(complicated condition) */\n" /*}*/ );
            next_tab(outfile);
            }
      else
            nice_printf(outfile, "while(" /*)*/ );
      }

 static void
#ifdef KR_headers
do_p1_2while(infile, outfile)
      FILE *infile;
      FILE *outfile;
#else
do_p1_2while(FILE *infile, FILE *outfile)
#endif
{
      expptr test;

      test = do_format(infile, outfile);
      if (*wh_next)
            nice_printf(outfile, "if (!(");
      expr_out(outfile, test);
      if (*wh_next++)
            nice_printf(outfile, "))\n\tbreak;\n");
      else {
            nice_printf(outfile, /*(*/ ") {\n");
            next_tab(outfile);
            }
      }

 static void
#ifdef KR_headers
do_p1_elseifstart(outfile)
      FILE *outfile;
#else
do_p1_elseifstart(FILE *outfile)
#endif
{ /* with sufficiently illegal input, ei_next == ei_last == 0 is possible */
      if (ei_next < ei_last && *ei_next++) {
            prev_tab(outfile);
            nice_printf(outfile, /*{*/
                  "} else /* if(complicated condition) */ {\n" /*}*/ );
            next_tab(outfile);
            }
      }

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