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formatdata.c

/****************************************************************
Copyright 1990-1, 1993-6, 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.
****************************************************************/

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

#define MAX_INIT_LINE 100
#define VNAME_MAX 64

static int memno2info Argdcl((int, Namep*));

typedef unsigned long Ulong;

 extern char *initbname;

 void
#ifdef KR_headers
list_init_data(Infile, Inname, outfile)
      FILE **Infile;
      char *Inname;
      FILE *outfile;
#else
list_init_data(FILE **Infile, char *Inname, FILE *outfile)
#endif
{
    FILE *sortfp;
    int status;

    fclose(*Infile);
    *Infile = 0;

    if (status = dsort(Inname, sortfname))
      fatali ("sort failed, status %d", status);

    scrub(Inname); /* optionally unlink Inname */

    if ((sortfp = fopen(sortfname, textread)) == NULL)
      Fatal("Couldn't open sorted initialization data");

    do_init_data(outfile, sortfp);
    fclose(sortfp);
    scrub(sortfname);

/* Insert a blank line after any initialized data */

      nice_printf (outfile, "\n");

    if (debugflag && infname)
       /* don't back block data file up -- it won't be overwritten */
      backup(initfname, initbname);
} /* list_init_data */



/* do_init_data -- returns YES when at least one declaration has been
   written */

 int
#ifdef KR_headers
do_init_data(outfile, infile)
      FILE *outfile;
      FILE *infile;
#else
do_init_data(FILE *outfile, FILE *infile)
#endif
{
    char varname[VNAME_MAX], ovarname[VNAME_MAX];
    ftnint offset;
    ftnint type;
    int vargroup; /* 0 --> init, 1 --> equiv, 2 --> common */
    int did_one = 0;          /* True when one has been output */
    chainp values = CHNULL;   /* Actual data values */
    int keepit = 0;
    Namep np;

    ovarname[0] = '\0';

    while (rdname (infile, &vargroup, varname) && rdlong (infile, &offset)
          && rdlong (infile, &type)) {
      if (strcmp (varname, ovarname)) {

      /* If this is a new variable name, the old initialization has been
         completed */

            wr_one_init(outfile, ovarname, &values, keepit);

            strcpy (ovarname, varname);
            values = CHNULL;
            if (vargroup == 0) {
                  if (memno2info(atoi(varname+2), &np)) {
                        if (((Addrp)np)->uname_tag != UNAM_NAME) {
                              err("do_init_data: expected NAME");
                              goto Keep;
                              }
                        np = ((Addrp)np)->user.name;
                        }
                  if (!(keepit = np->visused) && !np->vimpldovar)
                        warn1("local variable %s never used",
                              np->fvarname);
                  }
            else {
 Keep:
                  keepit = 1;
                  }
            if (keepit && !did_one) {
                  nice_printf (outfile, "/* Initialized data */\n\n");
                  did_one = YES;
                  }
      } /* if strcmp */

      values = mkchain((char *)data_value(infile, offset, (int)type), values);
    } /* while */

/* Write out the last declaration */

    wr_one_init (outfile, ovarname, &values, keepit);

    return did_one;
} /* do_init_data */


 ftnint
#ifdef KR_headers
wr_char_len(outfile, dimp, n, extra1)
      FILE *outfile;
      struct Dimblock *dimp;
      ftnint n;
      int extra1;
#else
wr_char_len(FILE *outfile, struct Dimblock *dimp, ftnint n, int extra1)
#endif
{
      int i, nd;
      expptr e;
      ftnint j, rv;

      if (!dimp) {
            nice_printf (outfile, extra1 ? "[%ld+1]" : "[%ld]", (long)n);
            return n + extra1;
            }
      nice_printf(outfile, "[%ld", (long)n);
      nd = dimp->ndim;
      rv = n;
      for(i = 0; i < nd; i++) {
            e = dimp->dims[i].dimsize;
            if (ISCONST(e)) {
                  if (ISINT(e->constblock.vtype))
                        j = e->constblock.Const.ci;
                  else if (ISREAL(e->constblock.vtype))
                        j = (ftnint)e->constblock.Const.cd[0];
                  else
                        goto non_const;
                  nice_printf(outfile, "*%ld", j);
                  rv *= j;
                  }
            else {
 non_const:
                  err ("wr_char_len:  nonconstant array size");
                  }
            }
      /* extra1 allows for stupid C compilers that complain about
       * too many initializers in
       *    char x[2] = "ab";
       */
      nice_printf(outfile, extra1 ? "+1]" : "]");
      return extra1 ? rv+1 : rv;
      }

 static int ch_ar_dim = -1; /* length of each element of char string array */
 static int eqvmemno;   /* kludge */

 static void
#ifdef KR_headers
write_char_init(outfile, Values, namep)
      FILE *outfile;
      chainp *Values;
      Namep namep;
#else
write_char_init(FILE *outfile, chainp *Values, Namep namep)
#endif
{
      struct Equivblock *eqv;
      long size;
      struct Dimblock *dimp;
      int i, nd, type;
      ftnint j;
      expptr ds;

      if (!namep)
            return;
      if(nequiv >= maxequiv)
            many("equivalences", 'q', maxequiv);
      eqv = &eqvclass[nequiv];
      eqv->eqvbottom = 0;
      type = namep->vtype;
      size = type == TYCHAR
            ? namep->vleng->constblock.Const.ci
            : typesize[type];
      if (dimp = namep->vdim)
            for(i = 0, nd = dimp->ndim; i < nd; i++) {
                  ds = dimp->dims[i].dimsize;
                  if (ISCONST(ds)) {
                        if (ISINT(ds->constblock.vtype))
                              j = ds->constblock.Const.ci;
                        else if (ISREAL(ds->constblock.vtype))
                              j = (ftnint)ds->constblock.Const.cd[0];
                        else
                              goto non_const;
                        size *= j;
                        }
                  else {
 non_const:
                        err("write_char_values: nonconstant array size");
                        }
                  }
      *Values = revchain(*Values);
      eqv->eqvtop = size;
      eqvmemno = ++lastvarno;
      eqv->eqvtype = type;
      wr_equiv_init(outfile, nequiv, Values, 0);
      def_start(outfile, namep->cvarname, CNULL, "");
      if (type == TYCHAR)
            margin_printf(outfile, "((char *)&equiv_%d)\n\n", eqvmemno);
      else
            margin_printf(outfile, dimp
                  ? "((%s *)&equiv_%d)\n\n" : "(*(%s *)&equiv_%d)\n\n",
                  c_type_decl(type,0), eqvmemno);
      }

/* wr_one_init -- outputs the initialization of the variable pointed to
   by   info.   When   is_addr   is true,   info   is an Addrp; otherwise,
   treat it as a Namep */

 void
#ifdef KR_headers
wr_one_init(outfile, varname, Values, keepit)
      FILE *outfile;
      char *varname;
      chainp *Values;
      int keepit;
#else
wr_one_init(FILE *outfile, char *varname, chainp *Values, int keepit)
#endif
{
    static int memno;
    static union {
      Namep name;
      Addrp addr;
    } info;
    Namep namep;
    int is_addr, size, type;
    ftnint last, loc;
    int is_scalar = 0;
    char *array_comment = NULL, *name;
    chainp cp, values;
    extern char datachar[];
    static int e1[3] = {1, 0, 1};
    ftnint x;
    extern int hsize;

    if (!keepit)
      goto done;
    if (varname == NULL || varname[1] != '.')
      goto badvar;

/* Get back to a meaningful representation; find the given   memno in one
   of the appropriate tables (user-generated variables in the hash table,
   system-generated variables in a separate list */

    memno = atoi(varname + 2);
    switch(varname[0]) {
      case 'q':
            /* Must subtract eqvstart when the source file
             * contains more than one procedure.
             */
            wr_equiv_init(outfile, eqvmemno = memno - eqvstart, Values, 0);
            goto done;
      case 'Q':
            /* COMMON initialization (BLOCK DATA) */
            wr_equiv_init(outfile, memno, Values, 1);
            goto done;
      case 'v':
            break;
      default:
 badvar:
            errstr("wr_one_init:  unknown variable name '%s'", varname);
            goto done;
      }

    is_addr = memno2info (memno, &info.name);
    if (info.name == (Namep) NULL) {
      err ("wr_one_init -- unknown variable");
      return;
      }
    if (is_addr) {
      if (info.addr -> uname_tag != UNAM_NAME) {
          erri ("wr_one_init -- couldn't get name pointer; tag is %d",
                info.addr -> uname_tag);
          namep = (Namep) NULL;
          nice_printf (outfile, " /* bad init data */");
      } else
          namep = info.addr -> user.name;
    } else
      namep = info.name;

      /* check for character initialization */

    *Values = values = revchain(*Values);
    type = info.name->vtype;
    if (type == TYCHAR) {
      for(last = 0; values; values = values->nextp) {
            cp = (chainp)values->datap;
            loc = (ftnint)cp->datap;
            if (loc > last) {
                  write_char_init(outfile, Values, namep);
                  goto done;
                  }
            last = (Ulong)cp->nextp->datap == TYBLANK
                  ? loc + (Ulong)cp->nextp->nextp->datap
                  : loc + 1;
            }
      if (halign && info.name->tag == TNAME) {
            nice_printf(outfile, "static struct { %s fill; char val",
                  halign);
            x = wr_char_len(outfile, namep->vdim, ch_ar_dim =
                  info.name -> vleng -> constblock.Const.ci, 1);
            if (x %= hsize)
                  nice_printf(outfile, "; char fill2[%ld]", hsize - x);
            name = info.name->cvarname;
            nice_printf(outfile, "; } %s_st = { 0,", name);
            wr_output_values(outfile, namep, *Values);
            nice_printf(outfile, " };\n");
            ch_ar_dim = -1;
            def_start(outfile, name, CNULL, name);
            margin_printf(outfile, "_st.val\n");
            goto done;
            }
      }
    else {
      size = typesize[type];
      loc = 0;
      for(; values; values = values->nextp) {
            if ((Ulong)((chainp)values->datap)->nextp->datap == TYCHAR) {
                  write_char_init(outfile, Values, namep);
                  goto done;
                  }
            last = ((long) ((chainp) values->datap)->datap) / size;
            if (last - loc > 4) {
                  write_char_init(outfile, Values, namep);
                  goto done;
                  }
            loc = last;
            }
      }
    values = *Values;

    nice_printf (outfile, "static %s ", c_type_decl (type, 0));

    if (is_addr)
      write_nv_ident (outfile, info.addr);
    else
      out_name (outfile, info.name);

    if (namep)
      is_scalar = namep -> vdim == (struct Dimblock *) NULL;

    if (namep && !is_scalar)
      array_comment = type == TYCHAR
            ? 0 : wr_ardecls(outfile, namep->vdim, 1L);

    if (type == TYCHAR)
      if (ISICON (info.name -> vleng))

/* We'll make single strings one character longer, so that we can use the
   standard C initialization.  All this does is pad an extra zero onto the
   end of the string */
            wr_char_len(outfile, namep->vdim, ch_ar_dim =
                  info.name -> vleng -> constblock.Const.ci, e1[Ansi]);
      else
            err ("variable length character initialization");

    if (array_comment)
      nice_printf (outfile, "%s", array_comment);

    nice_printf (outfile, " = ");
    wr_output_values (outfile, namep, values);
    ch_ar_dim = -1;
    nice_printf (outfile, ";\n");
 done:
    frchain(Values);
} /* wr_one_init */




 chainp
#ifdef KR_headers
data_value(infile, offset, type)
      FILE *infile;
      ftnint offset;
      int type;
#else
data_value(FILE *infile, ftnint offset, int type)
#endif
{
    char line[MAX_INIT_LINE + 1], *pointer;
    chainp vals, prev_val;
    char *newval;

    if (fgets (line, MAX_INIT_LINE, infile) == NULL) {
      err ("data_value:  error reading from intermediate file");
      return CHNULL;
    } /* if fgets */

/* Get rid of the trailing newline */

    if (line[0])
      line[strlen (line) - 1] = '\0';

#define iswhite(x) (isspace (x) || (x) == ',')

    pointer = line;
    prev_val = vals = CHNULL;

    while (*pointer) {
      register char *end_ptr, old_val;

/* Move   pointer   to the start of the next word */

      while (*pointer && iswhite (*pointer))
          pointer++;
      if (*pointer == '\0')
          break;

/* Move   end_ptr   to the end of the current word */

      for (end_ptr = pointer + 1; *end_ptr && !iswhite (*end_ptr);
            end_ptr++)
          ;

      old_val = *end_ptr;
      *end_ptr = '\0';

/* Add this value to the end of the list */

#ifdef NO_LONG_LONG
      if (ONEOF(type, MSKREAL|MSKCOMPLEX))
#else
      if (ONEOF(type, MSKREAL|MSKCOMPLEX|M(TYQUAD)))
#endif
            newval = cpstring(pointer);
      else
            newval = (char *)atol(pointer);
      if (vals) {
          prev_val->nextp = mkchain(newval, CHNULL);
          prev_val = prev_val -> nextp;
      } else
          prev_val = vals = mkchain(newval, CHNULL);
      *end_ptr = old_val;
      pointer = end_ptr;
    } /* while *pointer */

    return mkchain((char *)offset, mkchain((char *)(Ulong)type, vals));
} /* data_value */

 static void
overlapping(Void)
{
      extern char *filename0;
      static int warned = 0;

      if (warned)
            return;
      warned = 1;

      fprintf(stderr, "Error");
      if (filename0)
            fprintf(stderr, " in file %s", filename0);
      fprintf(stderr, ": overlapping initializations\n");
      nerr++;
      }

 static void make_one_const Argdcl((int, union Constant*, chainp));
 static long charlen;

 void
#ifdef KR_headers
wr_output_values(outfile, namep, values)
      FILE *outfile;
      Namep namep;
      chainp values;
#else
wr_output_values(FILE *outfile, Namep namep, chainp values)
#endif
{
      int type = TYUNKNOWN;
      struct Constblock Const;
      static expptr Vlen;

      if (namep)
            type = namep -> vtype;

/* Handle array initializations away from scalars */

      if (namep && namep -> vdim)
            wr_array_init (outfile, type, values);

      else if (values->nextp && type != TYCHAR)
            overlapping();

      else {
            make_one_const(type, &Const.Const, values);
            Const.vtype = type;
            Const.vstg = ONEOF(type, MSKREAL|MSKCOMPLEX) != 0;
            if (type== TYCHAR) {
                  if (!Vlen)
                        Vlen = ICON(0);
                  Const.vleng = Vlen;
                  Vlen->constblock.Const.ci = charlen;
                  out_const (outfile, &Const);
                  free (Const.Const.ccp);
                  }
            else {
#ifndef NO_LONG_LONG
                  if (type == TYQUAD)
                        Const.Const.cd[1] = 123.456; /* kludge */
                        /* kludge assumes max(sizeof(char*), */
                        /* sizeof(long long)) <= sizeof(double) */
#endif
                  out_const (outfile, &Const);
                  }
            }
      }


 void
#ifdef KR_headers
wr_array_init(outfile, type, values)
      FILE *outfile;
      int type;
      chainp values;
#else
wr_array_init(FILE *outfile, int type, chainp values)
#endif
{
    int size = typesize[type];
    long index, main_index = 0;
    int k;

    if (type == TYCHAR) {
      nice_printf(outfile, "\"");
      k = 0;
      if (Ansi != 1)
            ch_ar_dim = -1;
      }
    else
      nice_printf (outfile, "{ ");
    while (values) {
      struct Constblock Const;

      index = ((long) ((chainp) values->datap)->datap) / size;
      while (index > main_index) {

/* Fill with zeros.  The structure shorthand works because the compiler
   will expand the "0" in braces to fill the size of the entire structure
   */

          switch (type) {
              case TYREAL:
            case TYDREAL:
                nice_printf (outfile, "0.0,");
                break;
            case TYCOMPLEX:
            case TYDCOMPLEX:
                nice_printf (outfile, "{0},");
                break;
            case TYCHAR:
                  nice_printf(outfile, " ");
                  break;
            default:
                nice_printf (outfile, "0,");
                break;
          } /* switch */
          main_index++;
      } /* while index > main_index */

      if (index < main_index)
            overlapping();
      else switch (type) {
          case TYCHAR:
            { int this_char;

            if (k == ch_ar_dim) {
                  nice_printf(outfile, "\" \"");
                  k = 0;
                  }
            this_char = (int)(Ulong) ((chainp) values->datap)->
                        nextp->nextp->datap;
            if ((Ulong)((chainp)values->datap)->nextp->datap == TYBLANK) {
                  main_index += this_char;
                  k += this_char;
                  while(--this_char >= 0)
                        nice_printf(outfile, " ");
                  values = values -> nextp;
                  continue;
                  }
            nice_printf(outfile, str_fmt[this_char]);
            k++;
            } /* case TYCHAR */
              break;

#ifdef TYQUAD
          case TYQUAD:
#ifndef NO_LONG_LONG
            Const.Const.cd[1] = 123.456;
#endif
#endif
          case TYINT1:
          case TYSHORT:
          case TYLONG:
          case TYREAL:
          case TYDREAL:
          case TYLOGICAL:
          case TYLOGICAL1:
          case TYLOGICAL2:
          case TYCOMPLEX:
          case TYDCOMPLEX:
            make_one_const(type, &Const.Const, values);
            Const.vtype = type;
            Const.vstg = ONEOF(type, MSKREAL|MSKCOMPLEX) != 0;
            out_const(outfile, &Const);
              break;
          default:
              erri("wr_array_init: bad type '%d'", type);
              break;
      } /* switch */
      values = values->nextp;

      main_index++;
      if (values && type != TYCHAR)
          nice_printf (outfile, ",");
    } /* while values */

    if (type == TYCHAR) {
      nice_printf(outfile, "\"");
      }
    else
      nice_printf (outfile, " }");
} /* wr_array_init */


 static void
#ifdef KR_headers
make_one_const(type, storage, values)
      int type;
      union Constant *storage;
      chainp values;
#else
make_one_const(int type, union Constant *storage, chainp values)
#endif
{
    union Constant *Const;
    register char **L;

    if (type == TYCHAR) {
      char *str, *str_ptr;
      chainp v, prev;
      int b = 0, k, main_index = 0;

/* Find the max length of init string, by finding the highest offset
   value stored in the list of initial values */

      for(k = 1, prev = CHNULL, v = values; v; prev = v, v = v->nextp)
          ;
      if (prev != CHNULL)
          k = ((int)(Ulong) (((chainp) prev->datap)->datap)) + 2;
            /* + 2 above for null char at end */
      str = Alloc (k);
      for (str_ptr = str; values; str_ptr++) {
          int index = (int)(Ulong) (((chainp) values->datap)->datap);

          if (index < main_index)
            overlapping();
          while (index > main_index++)
            *str_ptr++ = ' ';

            k = (int)(Ulong)(((chainp)values->datap)->nextp->nextp->datap);
            if ((Ulong)((chainp)values->datap)->nextp->datap == TYBLANK) {
                  b = k;
                  break;
                  }
            *str_ptr = (char)k;
            values = values -> nextp;
      } /* for str_ptr */
      *str_ptr = '\0';
      Const = storage;
      Const -> ccp = str;
      Const -> ccp1.blanks = b;
      charlen = str_ptr - str;
    } else {
      int i = 0;
      chainp vals;

      vals = ((chainp)values->datap)->nextp->nextp;
      if (vals) {
            L = (char **)storage;
            do L[i++] = vals->datap;
                  while(vals = vals->nextp);
            }

    } /* else */

} /* make_one_const */


 int
#ifdef KR_headers
rdname(infile, vargroupp, name)
      FILE *infile;
      int *vargroupp;
      char *name;
#else
rdname(FILE *infile, int *vargroupp, char *name)
#endif
{
    register int i, c;

    c = getc (infile);

    if (feof (infile))
      return NO;

    *vargroupp = c - '0';
    for (i = 1;; i++) {
      if (i >= VNAME_MAX)
            Fatal("rdname: oversize name");
      c = getc (infile);
      if (feof (infile))
          return NO;
      if (c == '\t')
            break;
      *name++ = c;
    }
    *name = 0;
    return YES;
} /* rdname */

 int
#ifdef KR_headers
rdlong(infile, n)
      FILE *infile;
      ftnint *n;
#else
rdlong(FILE *infile, ftnint *n)
#endif
{
    register int c;

    for (c = getc (infile); !feof (infile) && isspace (c); c = getc (infile))
      ;

    if (feof (infile))
      return NO;

    for (*n = 0; isdigit (c); c = getc (infile))
      *n = 10 * (*n) + c - '0';
    return YES;
} /* rdlong */


 static int
#ifdef KR_headers
memno2info(memno, info)
      int memno;
      Namep *info;
#else
memno2info(int memno, Namep *info)
#endif
{
    chainp this_var;
    extern chainp new_vars;
    extern struct Hashentry *hashtab, *lasthash;
    struct Hashentry *entry;

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

      if (var == (Addrp) NULL)
          Fatal("memno2info:  null variable");
      else if (var -> tag != TADDR)
          Fatal("memno2info:  bad tag");
      if (memno == var -> memno) {
          *info = (Namep) var;
          return 1;
      } /* if memno == var -> memno */
    } /* for this_var = new_vars */

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

      if (var && var -> vardesc.varno == memno && var -> vstg == STGINIT) {
          *info = (Namep) var;
          return 0;
      } /* if entry -> vardesc.varno == memno */
    } /* for entry = hashtab */

    Fatal("memno2info:  couldn't find memno");
    return 0;
} /* memno2info */

 static chainp
#ifdef KR_headers
do_string(outfile, v, nloc)
      FILE *outfile;
      register chainp v;
      ftnint *nloc;
#else
do_string(FILE *outfile, register chainp v, ftnint *nloc)
#endif
{
      register chainp cp, v0;
      ftnint dloc, k, loc;
      unsigned long uk;
      char buf[8], *comma;

      nice_printf(outfile, "{");
      cp = (chainp)v->datap;
      loc = (ftnint)cp->datap;
      comma = "";
      for(v0 = v;;) {
            switch((Ulong)cp->nextp->datap) {
                  case TYBLANK:
                        k = (ftnint)cp->nextp->nextp->datap;
                        loc += k;
                        while(--k >= 0) {
                              nice_printf(outfile, "%s' '", comma);
                              comma = ", ";
                              }
                        break;
                  case TYCHAR:
                        uk = (ftnint)cp->nextp->nextp->datap;
                        sprintf(buf, chr_fmt[uk], uk);
                        nice_printf(outfile, "%s'%s'", comma, buf);
                        comma = ", ";
                        loc++;
                        break;
                  default:
                        goto done;
                  }
            v0 = v;
            if (!(v = v->nextp) || !(cp = (chainp)v->datap))
                  break;
            dloc = (ftnint)cp->datap;
            if (loc != dloc)
                  break;
            }
 done:
      nice_printf(outfile, "}");
      *nloc = loc;
      return v0;
      }

 static chainp
#ifdef KR_headers
Ado_string(outfile, v, nloc)
      FILE *outfile;
      register chainp v;
      ftnint *nloc;
#else
Ado_string(FILE *outfile, register chainp v, ftnint *nloc)
#endif
{
      register chainp cp, v0;
      ftnint dloc, k, loc;

      nice_printf(outfile, "\"");
      cp = (chainp)v->datap;
      loc = (ftnint)cp->datap;
      for(v0 = v;;) {
            switch((Ulong)cp->nextp->datap) {
                  case TYBLANK:
                        k = (ftnint)cp->nextp->nextp->datap;
                        loc += k;
                        while(--k >= 0)
                              nice_printf(outfile, " ");
                        break;
                  case TYCHAR:
                        k = (ftnint)cp->nextp->nextp->datap;
                        nice_printf(outfile, str_fmt[k]);
                        loc++;
                        break;
                  default:
                        goto done;
                  }
            v0 = v;
            if (!(v = v->nextp) || !(cp = (chainp)v->datap))
                  break;
            dloc = (ftnint)cp->datap;
            if (loc != dloc)
                  break;
            }
 done:
      nice_printf(outfile, "\"");
      *nloc = loc;
      return v0;
      }

 static char *
#ifdef KR_headers
Len(L, type)
      long L;
      int type;
#else
Len(long L, int type)
#endif
{
      static char buf[24];
      if (L == 1 && type != TYCHAR)
            return "";
      sprintf(buf, "[%ld]", L);
      return buf;
      }

 static void
#ifdef KR_headers
fill_dcl(outfile, t, k, L) FILE *outfile; int t; int k; ftnint L;
#else
fill_dcl(FILE *outfile, int t, int k, ftnint L)
#endif
{
      nice_printf(outfile, "%s fill_%d[%ld];\n", Typename[t], k, L);
      }

 static int
#ifdef KR_headers
fill_type(L, loc, xtype) ftnint L; ftnint loc; int xtype;
#else
fill_type(ftnint L, ftnint loc, int xtype)
#endif
{
      int ft, ft1, szshort;

      if (xtype == TYCHAR)
            return xtype;
      szshort = typesize[TYSHORT];
      ft = L % szshort ? TYCHAR : type_choice[L/szshort % 4];
      ft1 = loc % szshort ? TYCHAR : type_choice[loc/szshort % 4];
      if (typesize[ft] > typesize[ft1])
            ft = ft1;
      return ft;
      }

 static ftnint
#ifdef KR_headers
get_fill(dloc, loc, t0, t1, L0, L1, xtype) ftnint dloc; ftnint loc; int *t0; int *t1; ftnint *L0; ftnint *L1; int xtype;
#else
get_fill(ftnint dloc, ftnint loc, int *t0, int *t1, ftnint *L0, ftnint *L1, int xtype)
#endif
{
      ftnint L, L2, loc0;

      if (L = loc % typesize[xtype]) {
            loc0 = loc;
            loc += L = typesize[xtype] - L;
            if (L % typesize[TYSHORT])
                  *t0 = TYCHAR;
            else
                  L /= typesize[*t0 = fill_type(L, loc0, xtype)];
            }
      if (dloc < loc + typesize[xtype])
            return 0;
      *L0 = L;
      L2 = (dloc - loc) / typesize[xtype];
      loc += L2*typesize[xtype];
      if (dloc -= loc)
            dloc /= typesize[*t1 = fill_type(dloc, loc, xtype)];
      *L1 = dloc;
      return L2;
      }

 void
#ifdef KR_headers
wr_equiv_init(outfile, memno, Values, iscomm)
      FILE *outfile;
      int memno;
      chainp *Values;
      int iscomm;
#else
wr_equiv_init(FILE *outfile, int memno, chainp *Values, int iscomm)
#endif
{
      struct Equivblock *eqv;
      int btype, curtype, dtype, filltype, j, k, n, t0, t1;
      int wasblank, xfilled, xtype;
      static char Blank[] = "";
      register char *comma = Blank;
      register chainp cp, v;
      chainp sentinel, values, v1, vlast;
      ftnint L, L0, L1, L2, dL, dloc, loc, loc0;
      union Constant Const;
      char imag_buf[50], real_buf[50];
      int szshort = typesize[TYSHORT];
      static char typepref[] = {0, 0, TYINT1, TYSHORT, TYLONG,
#ifdef TYQUAD
                          TYQUAD,
#endif
                          TYREAL, TYDREAL, TYREAL, TYDREAL,
                          TYLOGICAL1, TYLOGICAL2,
                          TYLOGICAL, TYCHAR};
      static char basetype[] = {0, 0, TYCHAR, TYSHORT, TYLONG,
#ifdef TYQUAD
                          TYDREAL,
#endif
                          TYLONG, TYDREAL, TYLONG, TYDREAL,
                          TYCHAR, TYSHORT,
                          TYLONG, TYCHAR, 0 /* for TYBLANK */ };
      extern int htype;
      char *z;

      /* add sentinel */
      if (iscomm) {
            L = extsymtab[memno].maxleng;
            xtype = extsymtab[memno].extype;
            }
      else {
            eqv = &eqvclass[memno];
            L = eqv->eqvtop - eqv->eqvbottom;
            xtype = eqv->eqvtype;
            }

      if (halign && typealign[typepref[xtype]] < typealign[htype])
            xtype = htype;
      xtype = typepref[xtype];
      *Values = values = revchain(vlast = *Values);

      xfilled = 2;
      if (xtype != TYCHAR) {

            /* unless the data include a value of the appropriate
             * type, we add an extra element in an attempt
             * to force correct alignment */

            btype = basetype[xtype];
            loc = 0;
            for(v = *Values;;v = v->nextp) {
                  if (!v) {
                        dtype = typepref[xtype];
                        z = ISREAL(dtype) ? cpstring("0.") : (char *)0;
                        k = typesize[dtype];
                        if (j = (int)(L % k))
                              L += k - j;
                        v = mkchain((char *)L,
                              mkchain((char *)(Ulong)dtype,
                                    mkchain(z, CHNULL)));
                        vlast = vlast->nextp =
                              mkchain((char *)v, CHNULL);
                        L += k;
                        break;
                        }
                  cp = (chainp)v->datap;
                  if (basetype[(Ulong)cp->nextp->datap] == btype)
                        break;
                  dloc = (ftnint)cp->datap;
                  if (get_fill(dloc, loc, &t0, &t1, &L0, &L1, xtype)) {
                        xfilled = 0;
                        break;
                        }
                  L1 = dloc - loc;
                  if (L1 > 0
                   && !(L1 % szshort)
                   && !(loc % szshort)
                   && btype <= type_choice[L1/szshort % 4]
                   && btype <= type_choice[loc/szshort % 4])
                        break;
                  dtype = (int)(Ulong)cp->nextp->datap;
                  loc = dloc + (dtype == TYBLANK
                              ? (ftnint)cp->nextp->nextp->datap
                              : typesize[dtype]);
                  }
            }
      sentinel = mkchain((char *)L, mkchain((char *)TYERROR,CHNULL));
      vlast->nextp = mkchain((char *)sentinel, CHNULL);

      /* use doublereal fillers only if there are doublereal values */

      k = TYLONG;
      for(v = values; v; v = v->nextp)
            if (ONEOF((Ulong)((chainp)v->datap)->nextp->datap,
                        M(TYDREAL)|M(TYDCOMPLEX))) {
                  k = TYDREAL;
                  break;
                  }
      type_choice[0] = k;

      nice_printf(outfile, "%sstruct {\n", iscomm ? "" : "static ");
      next_tab(outfile);
      loc = loc0 = k = 0;
      curtype = -1;
      for(v = values; v; v = v->nextp) {
            cp = (chainp)v->datap;
            dloc = (ftnint)cp->datap;
            L = dloc - loc;
            if (L < 0) {
                  overlapping();
                  if ((Ulong)cp->nextp->datap != TYERROR) {
                        v1 = cp;
                        frchain(&v1);
                        v->datap = 0;
                        }
                  continue;
                  }
            dtype = (int)(Ulong)cp->nextp->datap;
            if (dtype == TYBLANK) {
                  dtype = TYCHAR;
                  wasblank = 1;
                  }
            else
                  wasblank = 0;
            if (curtype != dtype || L > 0) {
                  if (curtype != -1) {
                        L1 = (loc - loc0)/dL;
                        nice_printf(outfile, "%s e_%d%s;\n",
                              Typename[curtype], ++k,
                              Len(L1,curtype));
                        }
                  curtype = dtype;
                  loc0 = dloc;
                  }
            if (L > 0) {
                  filltype = fill_type(L, loc, xtype);
                  L1 = L / typesize[filltype];
                  if (!xfilled && (L2 = get_fill(dloc, loc, &t0, &t1,
                                          &L0, &L1, xtype))) {
                        xfilled = 1;
                        if (L0)
                              fill_dcl(outfile, t0, ++k, L0);
                        fill_dcl(outfile, xtype, ++k, L2);
                        if (L1)
                              fill_dcl(outfile, t1, ++k, L1);
                        }
                  else
                        fill_dcl(outfile, filltype, ++k, L1);
                  loc = dloc;
                  }
            if (wasblank) {
                  loc += (ftnint)cp->nextp->nextp->datap;
                  dL = 1;
                  }
            else {
                  dL = typesize[dtype];
                  loc += dL;
                  }
            }
      nice_printf(outfile, "} %s = { ", iscomm
            ? extsymtab[memno].cextname
            : equiv_name(eqvmemno, CNULL));
      loc = 0;
      xfilled &= 2;
      for(v = values; ; v = v->nextp) {
            cp = (chainp)v->datap;
            if (!cp)
                  continue;
            dtype = (int)(Ulong)cp->nextp->datap;
            if (dtype == TYERROR)
                  break;
            dloc = (ftnint)cp->datap;
            if (dloc > loc) {
                  n = 1;
                  if (!xfilled && (L2 = get_fill(dloc, loc, &t0, &t1,
                                          &L0, &L1, xtype))) {
                        xfilled = 1;
                        if (L0)
                              n = 2;
                        if (L1)
                              n++;
                        }
                  while(n--) {
                        nice_printf(outfile, "%s{0}", comma);
                        comma = ", ";
                        }
                  loc = dloc;
                  }
            if (comma != Blank)
                  nice_printf(outfile, ", ");
            comma = ", ";
            if (dtype == TYCHAR || dtype == TYBLANK) {
                  v =  Ansi == 1  ? Ado_string(outfile, v, &loc)
                              :  do_string(outfile, v, &loc);
                  continue;
                  }
            make_one_const(dtype, &Const, v);
            switch(dtype) {
                  case TYLOGICAL:
                  case TYLOGICAL2:
                  case TYLOGICAL1:
                        if (Const.ci < 0 || Const.ci > 1)
                              errl(
                    "wr_equiv_init: unexpected logical value %ld",
                                    Const.ci);
                        nice_printf(outfile,
                              Const.ci ? "TRUE_" : "FALSE_");
                        break;
                  case TYINT1:
                  case TYSHORT:
                  case TYLONG:
#ifdef TYQUAD0
                  case TYQUAD:
#endif
                        nice_printf(outfile, "%ld", Const.ci);
                        break;
#ifndef NO_LONG_LONG
                  case TYQUAD:
                        nice_printf(outfile, "%s", Const.cds[0]);
                        break;
#endif
                  case TYREAL:
                        nice_printf(outfile, "%s",
                              flconst(real_buf, Const.cds[0]));
                        break;
                  case TYDREAL:
                        nice_printf(outfile, "%s", Const.cds[0]);
                        break;
                  case TYCOMPLEX:
                        nice_printf(outfile, "%s, %s",
                              flconst(real_buf, Const.cds[0]),
                              flconst(imag_buf, Const.cds[1]));
                        break;
                  case TYDCOMPLEX:
                        nice_printf(outfile, "%s, %s",
                              Const.cds[0], Const.cds[1]);
                        break;
                  default:
                        erri("unexpected type %d in wr_equiv_init",
                              dtype);
                  }
            loc += typesize[dtype];
            }
      nice_printf(outfile, " };\n\n");
      prev_tab(outfile);
      frchain(&sentinel);
      }

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