gcc/libf2c/libI77/lread.c

#include "config.h"
#include <ctype.h>
#include "f2c.h"
#include "fio.h"

/* Compile with -DF8X_NML_ELIDE_QUOTES to permit eliding quotation */
/* marks in namelist input a la the Fortran 8X Draft published in  */
/* the May 1989 issue of Fortran Forum. */


extern char *f__fmtbuf;
extern int f__fmtlen;

#ifdef Allow_TYQUAD
static longint f__llx;
#endif

#undef abs
#undef min
#undef max
#include <stdlib.h>

#include "fmt.h"
#include "lio.h"
#include "fp.h"

int (*f__lioproc) (ftnint *, char *, ftnlen, ftnint), (*l_getc) (void),
  (*l_ungetc) (int, FILE *);

int l_eof;

#define isblnk(x) (f__ltab[x+1]&B)
#define issep(x) (f__ltab[x+1]&SX)
#define isapos(x) (f__ltab[x+1]&AX)
#define isexp(x) (f__ltab[x+1]&EX)
#define issign(x) (f__ltab[x+1]&SG)
#define iswhit(x) (f__ltab[x+1]&WH)
#define SX 1
#define B 2
#define AX 4
#define EX 8
#define SG 16
#define WH 32
char f__ltab[128 + 1] = {	/* offset one for EOF */
  0,
  0, 0, AX, 0, 0, 0, 0, 0, 0, WH | B, SX | WH, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  SX | B | WH, 0, AX, 0, 0, 0, 0, AX, 0, 0, 0, SG, SX, SG, 0, SX,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, EX, EX, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  AX, 0, 0, 0, EX, EX, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

#ifdef ungetc
static int
un_getc (int x, FILE * f__cf)
{
  return ungetc (x, f__cf);
}
#else
#define un_getc ungetc
extern int ungetc (int, FILE *);	/* for systems with a buggy stdio.h */
#endif

int
t_getc (void)
{
  int ch;
  if (f__curunit->uend)
    return (EOF);
  if ((ch = getc (f__cf)) != EOF)
    return (ch);
  if (feof (f__cf))
    f__curunit->uend = l_eof = 1;
  return (EOF);
}

integer
e_rsle (void)
{
  int ch;
  f__init = 1;
  if (f__curunit->uend)
    return (0);
  while ((ch = t_getc ()) != '\n')
    if (ch == EOF)
      {
	if (feof (f__cf))
	  f__curunit->uend = l_eof = 1;
	return EOF;
      }
  return (0);
}

flag f__lquit;
int f__lcount, f__ltype, nml_read;
char *f__lchar;
double f__lx, f__ly;
#define ERR(x) if((n=(x))) {f__init &= ~2; return(n);}
#define GETC(x) (x=(*l_getc)())
#define Ungetc(x,y) (*l_ungetc)(x,y)

static int
l_R (int poststar, int reqint)
{
  char s[FMAX + EXPMAXDIGS + 4];
  register int ch;
  register char *sp, *spe, *sp1;
  long e, exp;
  int havenum, havestar, se;

  if (!poststar)
    {
      if (f__lcount > 0)
	return (0);
      f__lcount = 1;
    }
#ifdef Allow_TYQUAD
  f__llx = 0;
#endif
  f__ltype = 0;
  exp = 0;
  havestar = 0;
retry:
  sp1 = sp = s;
  spe = sp + FMAX;
  havenum = 0;

  switch (GETC (ch))
    {
    case '-':
      *sp++ = ch;
      sp1++;
      spe++;
    case '+':
      GETC (ch);
    }
  while (ch == '0')
    {
      ++havenum;
      GETC (ch);
    }
  while (isdigit (ch))
    {
      if (sp < spe)
	*sp++ = ch;
      else
	++exp;
      GETC (ch);
    }
  if (ch == '*' && !poststar)
    {
      if (sp == sp1 || exp || *s == '-')
	{
	  errfl (f__elist->cierr, 112, "bad repetition count");
	}
      poststar = havestar = 1;
      *sp = 0;
      f__lcount = atoi (s);
      goto retry;
    }
  if (ch == '.')
    {
#ifndef ALLOW_FLOAT_IN_INTEGER_LIST_INPUT
      if (reqint)
	errfl (f__elist->cierr, 115, "invalid integer");
#endif
      GETC (ch);
      if (sp == sp1)
	while (ch == '0')
	  {
	    ++havenum;
	    --exp;
	    GETC (ch);
	  }
      while (isdigit (ch))
	{
	  if (sp < spe)
	    {
	      *sp++ = ch;
	      --exp;
	    }
	  GETC (ch);
	}
    }
  havenum += sp - sp1;
  se = 0;
  if (issign (ch))
    goto signonly;
  if (havenum && isexp (ch))
    {
#ifndef ALLOW_FLOAT_IN_INTEGER_LIST_INPUT
      if (reqint)
	errfl (f__elist->cierr, 115, "invalid integer");
#endif
      GETC (ch);
      if (issign (ch))
	{
	signonly:
	  if (ch == '-')
	    se = 1;
	  GETC (ch);
	}
      if (!isdigit (ch))
	{
	bad:
	  errfl (f__elist->cierr, 112, "exponent field");
	}

      e = ch - '0';
      while (isdigit (GETC (ch)))
	{
	  e = 10 * e + ch - '0';
	  if (e > EXPMAX)
	    goto bad;
	}
      if (se)
	exp -= e;
      else
	exp += e;
    }
  (void) Ungetc (ch, f__cf);
  if (sp > sp1)
    {
      ++havenum;
      while (*--sp == '0')
	++exp;
      if (exp)
	sprintf (sp + 1, "e%ld", exp);
      else
	sp[1] = 0;
      f__lx = atof (s);
#ifdef Allow_TYQUAD
      if (reqint & 2 && (se = sp - sp1 + exp) > 14 && se < 20)
	{
	  /* Assuming 64-bit longint and 32-bit long. */
	  if (exp < 0)
	    sp += exp;
	  if (sp1 <= sp)
	    {
	      f__llx = *sp1 - '0';
	      while (++sp1 <= sp)
		f__llx = 10 * f__llx + (*sp1 - '0');
	    }
	  while (--exp >= 0)
	    f__llx *= 10;
	  if (*s == '-')
	    f__llx = -f__llx;
	}
#endif
    }
  else
    f__lx = 0.;
  if (havenum)
    f__ltype = TYLONG;
  else
    switch (ch)
      {
      case ',':
      case '/':
	break;
      default:
	if (havestar && (ch == ' ' || ch == '\t' || ch == '\n'))
	  break;
	if (nml_read > 1)
	  {
	    f__lquit = 2;
	    return 0;
	  }
	errfl (f__elist->cierr, 112, "invalid number");
      }
  return 0;
}

static int
rd_count (register int ch)
{
  if (ch < '0' || ch > '9')
    return 1;
  f__lcount = ch - '0';
  while (GETC (ch) >= '0' && ch <= '9')
    f__lcount = 10 * f__lcount + ch - '0';
  Ungetc (ch, f__cf);
  return f__lcount <= 0;
}

static int
l_C (void)
{
  int ch, nml_save;
  double lz;
  if (f__lcount > 0)
    return (0);
  f__ltype = 0;
  GETC (ch);
  if (ch != '(')
    {
      if (nml_read > 1 && (ch < '0' || ch > '9'))
	{
	  Ungetc (ch, f__cf);
	  f__lquit = 2;
	  return 0;
	}
      if (rd_count (ch))
        {
	  if (!f__cf || !feof (f__cf))
	    errfl (f__elist->cierr, 112, "complex format");
	  else
	    err (f__elist->cierr, (EOF), "lread");
	}
      if (GETC (ch) != '*')
	{
	  if (!f__cf || !feof (f__cf))
	    errfl (f__elist->cierr, 112, "no star");
	  else
	    err (f__elist->cierr, (EOF), "lread");
	}
      if (GETC (ch) != '(')
	{
	  Ungetc (ch, f__cf);
	  return (0);
	}
    }
  else
    f__lcount = 1;
  while (iswhit (GETC (ch)));
  Ungetc (ch, f__cf);
  nml_save = nml_read;
  nml_read = 0;
  if ((ch = l_R (1, 0)))
    return ch;
  if (!f__ltype)
    errfl (f__elist->cierr, 112, "no real part");
  lz = f__lx;
  while (iswhit (GETC (ch)));
  if (ch != ',')
    {
      (void) Ungetc (ch, f__cf);
      errfl (f__elist->cierr, 112, "no comma");
    }
  while (iswhit (GETC (ch)));
  (void) Ungetc (ch, f__cf);
  if ((ch = l_R (1, 0)))
    return ch;
  if (!f__ltype)
    errfl (f__elist->cierr, 112, "no imaginary part");
  while (iswhit (GETC (ch)));
  if (ch != ')')
    errfl (f__elist->cierr, 112, "no )");
  f__ly = f__lx;
  f__lx = lz;
#ifdef Allow_TYQUAD
  f__llx = 0;
#endif
  nml_read = nml_save;
  return (0);
}

static char nmLbuf[256], *nmL_next;
static int (*nmL_getc_save) (void);
static int (*nmL_ungetc_save) (int, FILE *);

static int
nmL_getc (void)
{
  int rv;
  if ((rv = *nmL_next++))
    return rv;
  l_getc = nmL_getc_save;
  l_ungetc = nmL_ungetc_save;
  return (*l_getc) ();
}

static int
nmL_ungetc (int x, FILE * f)
{
  f = f;			/* banish non-use warning */
  return *--nmL_next = x;
}

static int
Lfinish (int ch, int dot, int *rvp)
{
  char *s, *se;
  static char what[] = "namelist input";

  s = nmLbuf + 2;
  se = nmLbuf + sizeof (nmLbuf) - 1;
  *s++ = ch;
  while (!issep (GETC (ch)) && ch != EOF)
    {
      if (s >= se)
	{
	nmLbuf_ovfl:
	  return *rvp = err__fl (f__elist->cierr, 131, what);
	}
      *s++ = ch;
      if (ch != '=')
	continue;
      if (dot)
	return *rvp = err__fl (f__elist->cierr, 112, what);
    got_eq:
      *s = 0;
      nmL_getc_save = l_getc;
      l_getc = nmL_getc;
      nmL_ungetc_save = l_ungetc;
      l_ungetc = nmL_ungetc;
      nmLbuf[1] = *(nmL_next = nmLbuf) = ',';
      *rvp = f__lcount = 0;
      return 1;
    }
  if (dot)
    goto done;
  for (;;)
    {
      if (s >= se)
	goto nmLbuf_ovfl;
      *s++ = ch;
      if (!isblnk (ch))
	break;
      if (GETC (ch) == EOF)
	goto done;
    }
  if (ch == '=')
    goto got_eq;
done:
  Ungetc (ch, f__cf);
  return 0;
}

static int
l_L (void)
{
  int ch, rv, sawdot;
  if (f__lcount > 0)
    return (0);
  f__lcount = 1;
  f__ltype = 0;
  GETC (ch);
  if (isdigit (ch))
    {
      rd_count (ch);
      if (GETC (ch) != '*')
        {
	  if (!f__cf || !feof (f__cf))
	    errfl (f__elist->cierr, 112, "no star");
	  else
	    err (f__elist->cierr, (EOF), "lread");
	}
      GETC (ch);
    }
  sawdot = 0;
  if (ch == '.')
    {
      sawdot = 1;
      GETC (ch);
    }
  switch (ch)
    {
    case 't':
    case 'T':
      if (nml_read && Lfinish (ch, sawdot, &rv))
	return rv;
      f__lx = 1;
      break;
    case 'f':
    case 'F':
      if (nml_read && Lfinish (ch, sawdot, &rv))
	return rv;
      f__lx = 0;
      break;
    default:
      if (isblnk (ch) || issep (ch) || ch == EOF)
	{
	  (void) Ungetc (ch, f__cf);
	  return (0);
	}
      if (nml_read > 1)
	{
	  Ungetc (ch, f__cf);
	  f__lquit = 2;
	  return 0;
	}
      errfl (f__elist->cierr, 112, "logical");
    }
  f__ltype = TYLONG;
  while (!issep (GETC (ch)) && ch != EOF);
  (void) Ungetc (ch, f__cf);
  return (0);
}

#define BUFSIZE	128

static int
l_CHAR (void)
{
  int ch, size, i;
  static char rafail[] = "realloc failure";
  char quote, *p;
  if (f__lcount > 0)
    return (0);
  f__ltype = 0;
  if (f__lchar != NULL)
    free (f__lchar);
  size = BUFSIZE;
  p = f__lchar = (char *) malloc ((unsigned int) size);
  if (f__lchar == NULL)
    errfl (f__elist->cierr, 113, "no space");

  GETC (ch);
  if (isdigit (ch))
    {
      /* allow Fortran 8x-style unquoted string...    */
      /* either find a repetition count or the string */
      f__lcount = ch - '0';
      *p++ = ch;
      for (i = 1;;)
	{
	  switch (GETC (ch))
	    {
	    case '*':
	      if (f__lcount == 0)
		{
		  f__lcount = 1;
#ifndef F8X_NML_ELIDE_QUOTES
		  if (nml_read)
		    goto no_quote;
#endif
		  goto noquote;
		}
	      p = f__lchar;
	      goto have_lcount;
	    case ',':
	    case ' ':
	    case '\t':
	    case '\n':
	    case '/':
	      Ungetc (ch, f__cf);
	      /* no break */
	    case EOF:
	      f__lcount = 1;
	      f__ltype = TYCHAR;
	      return *p = 0;
	    }
	  if (!isdigit (ch))
	    {
	      f__lcount = 1;
#ifndef F8X_NML_ELIDE_QUOTES
	      if (nml_read)
		{
		no_quote:
		  errfl (f__elist->cierr, 112,
			 "undelimited character string");
		}
#endif
	      goto noquote;
	    }
	  *p++ = ch;
	  f__lcount = 10 * f__lcount + ch - '0';
	  if (++i == size)
	    {
	      f__lchar = (char *) realloc (f__lchar,
					   (unsigned int) (size += BUFSIZE));
	      if (f__lchar == NULL)
		errfl (f__elist->cierr, 113, rafail);
	      p = f__lchar + i;
	    }
	}
    }
  else
    (void) Ungetc (ch, f__cf);
have_lcount:
  if (GETC (ch) == '\'' || ch == '"')
    quote = ch;
  else if (isblnk (ch) || (issep (ch) && ch != '\n') || ch == EOF)
    {
      Ungetc (ch, f__cf);
      return 0;
    }
#ifndef F8X_NML_ELIDE_QUOTES
  else if (nml_read > 1)
    {
      Ungetc (ch, f__cf);
      f__lquit = 2;
      return 0;
    }
#endif
  else
    {
      /* Fortran 8x-style unquoted string */
      *p++ = ch;
      for (i = 1;;)
	{
	  switch (GETC (ch))
	    {
	    case ',':
	    case ' ':
	    case '\t':
	    case '\n':
	    case '/':
	      Ungetc (ch, f__cf);
	      /* no break */
	    case EOF:
	      f__ltype = TYCHAR;
	      return *p = 0;
	    }
	noquote:
	  *p++ = ch;
	  if (++i == size)
	    {
	      f__lchar = (char *) realloc (f__lchar,
					   (unsigned int) (size += BUFSIZE));
	      if (f__lchar == NULL)
		errfl (f__elist->cierr, 113, rafail);
	      p = f__lchar + i;
	    }
	}
    }
  f__ltype = TYCHAR;
  for (i = 0;;)
    {
      while (GETC (ch) != quote && ch != '\n' && ch != EOF && ++i < size)
	*p++ = ch;
      if (i == size)
	{
	newone:
	  f__lchar = (char *) realloc (f__lchar,
				       (unsigned int) (size += BUFSIZE));
	  if (f__lchar == NULL)
	    errfl (f__elist->cierr, 113, rafail);
	  p = f__lchar + i - 1;
	  *p++ = ch;
	}
      else if (ch == EOF)
	return (EOF);
      else if (ch == '\n')
	{
	  if (*(p - 1) != '\\')
	    continue;
	  i--;
	  p--;
	  if (++i < size)
	    *p++ = ch;
	  else
	    goto newone;
	}
      else if (GETC (ch) == quote)
	{
	  if (++i < size)
	    *p++ = ch;
	  else
	    goto newone;
	}
      else
	{
	  (void) Ungetc (ch, f__cf);
	  *p = 0;
	  return (0);
	}
    }
}

int
c_le (cilist * a)
{
  if (f__init != 1)
    f_init ();
  f__init = 3;
  f__fmtbuf = "list io";
  f__curunit = &f__units[a->ciunit];
  f__fmtlen = 7;
  if (a->ciunit >= MXUNIT || a->ciunit < 0)
    err (a->cierr, 101, "stler");
  f__scale = f__recpos = 0;
  f__elist = a;
  if (f__curunit->ufd == NULL && fk_open (SEQ, FMT, a->ciunit))
    err (a->cierr, 102, "lio");
  f__cf = f__curunit->ufd;
  if (!f__curunit->ufmt)
    err (a->cierr, 103, "lio");
  return (0);
}

int
l_read (ftnint * number, char *ptr, ftnlen len, ftnint type)
{
#define Ptr ((flex *)ptr)
  int i, n, ch;
  doublereal *yy;
  real *xx;
  for (i = 0; i < *number; i++)
    {
      if (f__lquit)
	return (0);
      if (l_eof)
	err (f__elist->ciend, EOF, "list in");
      if (f__lcount == 0)
	{
	  f__ltype = 0;
	  for (;;)
	    {
	      GETC (ch);
	      switch (ch)
		{
		case EOF:
		  err (f__elist->ciend, (EOF), "list in");
		case ' ':
		case '\t':
		case '\n':
		  continue;
		case '/':
		  f__lquit = 1;
		  goto loopend;
		case ',':
		  f__lcount = 1;
		  goto loopend;
		default:
		  (void) Ungetc (ch, f__cf);
		  goto rddata;
		}
	    }
	}
    rddata:
      switch ((int) type)
	{
	case TYINT1:
	case TYSHORT:
	case TYLONG:
#ifndef ALLOW_FLOAT_IN_INTEGER_LIST_INPUT
	  ERR (l_R (0, 1));
	  break;
#endif
	case TYREAL:
	case TYDREAL:
	  ERR (l_R (0, 0));
	  break;
#ifdef TYQUAD
	case TYQUAD:
	  n = l_R (0, 2);
	  if (n)
	    return n;
	  break;
#endif
	case TYCOMPLEX:
	case TYDCOMPLEX:
	  ERR (l_C ());
	  break;
	case TYLOGICAL1:
	case TYLOGICAL2:
	case TYLOGICAL:
	  ERR (l_L ());
	  break;
	case TYCHAR:
	  ERR (l_CHAR ());
	  break;
	}
      while (GETC (ch) == ' ' || ch == '\t');
      if (ch != ',' || f__lcount > 1)
	Ungetc (ch, f__cf);
    loopend:
      if (f__lquit)
	return (0);
      if (f__cf && ferror (f__cf))
	{
	  clearerr (f__cf);
	  errfl (f__elist->cierr, errno, "list in");
	}
      if (f__ltype == 0)
	goto bump;
      switch ((int) type)
	{
	case TYINT1:
	case TYLOGICAL1:
	  Ptr->flchar = (char) f__lx;
	  break;
	case TYLOGICAL2:
	case TYSHORT:
	  Ptr->flshort = (short) f__lx;
	  break;
	case TYLOGICAL:
	case TYLONG:
	  Ptr->flint = (ftnint) f__lx;
	  break;
#ifdef Allow_TYQUAD
	case TYQUAD:
	  if (!(Ptr->fllongint = f__llx))
	    Ptr->fllongint = f__lx;
	  break;
#endif
	case TYREAL:
	  Ptr->flreal = f__lx;
	  break;
	case TYDREAL:
	  Ptr->fldouble = f__lx;
	  break;
	case TYCOMPLEX:
	  xx = (real *) ptr;
	  *xx++ = f__lx;
	  *xx = f__ly;
	  break;
	case TYDCOMPLEX:
	  yy = (doublereal *) ptr;
	  *yy++ = f__lx;
	  *yy = f__ly;
	  break;
	case TYCHAR:
	  b_char (f__lchar, ptr, len);
	  break;
	}
    bump:
      if (f__lcount > 0)
	f__lcount--;
      ptr += len;
      if (nml_read)
	nml_read++;
    }
  return (0);
#undef Ptr
}

integer
s_rsle (cilist * a)
{
  int n;

  f__reading = 1;
  f__external = 1;
  f__formatted = 1;
  if ((n = c_le (a)))
    return (n);
  f__lioproc = l_read;
  f__lquit = 0;
  f__lcount = 0;
  l_eof = 0;
  if (f__curunit->uwrt && f__nowreading (f__curunit))
    err (a->cierr, errno, "read start");
  if (f__curunit->uend)
    err (f__elist->ciend, (EOF), "read start");
  l_getc = t_getc;
  l_ungetc = un_getc;
  f__doend = xrd_SL;
  return (0);
}