static fnode *
parse_format_list (st_parameter_dt *dtp, bool *save_ok, bool *seen_dd)
{
fnode *head, *tail;
format_token t, u, t2;
int repeat;
format_data *fmt = dtp->u.p.fmt;
bool saveit, seen_data_desc = false;
head = tail = NULL;
saveit = *save_ok;
/* Get the next format item */
format_item:
t = format_lex (fmt);
format_item_1:
switch (t)
{
case FMT_STAR:
t = format_lex (fmt);
if (t != FMT_LPAREN)
{
fmt->error = "Left parenthesis required after '*'";
goto finished;
}
get_fnode (fmt, &head, &tail, FMT_LPAREN);
tail->repeat = -2; /* Signifies unlimited format. */
tail->u.child = parse_format_list (dtp, &saveit, &seen_data_desc);
if (fmt->error != NULL)
goto finished;
if (!seen_data_desc)
{
fmt->error = "'*' requires at least one associated data descriptor";
goto finished;
}
goto between_desc;
case FMT_POSINT:
repeat = fmt->value;
t = format_lex (fmt);
switch (t)
{
case FMT_LPAREN:
get_fnode (fmt, &head, &tail, FMT_LPAREN);
tail->repeat = repeat;
tail->u.child = parse_format_list (dtp, &saveit, &seen_data_desc);
*seen_dd = seen_data_desc;
if (fmt->error != NULL)
goto finished;
goto between_desc;
case FMT_SLASH:
get_fnode (fmt, &head, &tail, FMT_SLASH);
tail->repeat = repeat;
goto optional_comma;
case FMT_X:
get_fnode (fmt, &head, &tail, FMT_X);
tail->repeat = 1;
tail->u.k = fmt->value;
goto between_desc;
case FMT_P:
goto p_descriptor;
default:
goto data_desc;
}
case FMT_LPAREN:
get_fnode (fmt, &head, &tail, FMT_LPAREN);
tail->repeat = 1;
tail->u.child = parse_format_list (dtp, &saveit, &seen_data_desc);
*seen_dd = seen_data_desc;
if (fmt->error != NULL)
goto finished;
goto between_desc;
case FMT_SIGNED_INT: /* Signed integer can only precede a P format. */
case FMT_ZERO: /* Same for zero. */
t = format_lex (fmt);
if (t != FMT_P)
{
fmt->error = "Expected P edit descriptor in format";
goto finished;
}
p_descriptor:
get_fnode (fmt, &head, &tail, FMT_P);
tail->u.k = fmt->value;
tail->repeat = 1;
t = format_lex (fmt);
if (t == FMT_F || t == FMT_EN || t == FMT_ES || t == FMT_D
|| t == FMT_G || t == FMT_E)
{
repeat = 1;
goto data_desc;
}
if (t != FMT_COMMA && t != FMT_RPAREN && t != FMT_SLASH
&& t != FMT_POSINT)
{
fmt->error = "Comma required after P descriptor";
goto finished;
}
fmt->saved_token = t;
goto optional_comma;
case FMT_P: /* P and X require a prior number */
fmt->error = "P descriptor requires leading scale factor";
goto finished;
case FMT_X:
/*
EXTENSION!
If we would be pedantic in the library, we would have to reject
an X descriptor without an integer prefix:
fmt->error = "X descriptor requires leading space count";
goto finished;
However, this is an extension supported by many Fortran compilers,
including Cray, HP, AIX, and IRIX. Therefore, we allow it in the
runtime library, and make the front end reject it if the compiler
is in pedantic mode. The interpretation of 'X' is '1X'.
*/
get_fnode (fmt, &head, &tail, FMT_X);
tail->repeat = 1;
tail->u.k = 1;
goto between_desc;
case FMT_STRING:
/* TODO: Find out why it is necessary to turn off format caching. */
saveit = false;
get_fnode (fmt, &head, &tail, FMT_STRING);
tail->u.string.p = fmt->string;
tail->u.string.length = fmt->value;
tail->repeat = 1;
goto optional_comma;
case FMT_RC:
case FMT_RD:
case FMT_RN:
case FMT_RP:
case FMT_RU:
case FMT_RZ:
notify_std (&dtp->common, GFC_STD_F2003, "Fortran 2003: Round "
"descriptor not allowed");
get_fnode (fmt, &head, &tail, t);
tail->repeat = 1;
goto between_desc;
case FMT_DC:
case FMT_DP:
notify_std (&dtp->common, GFC_STD_F2003, "Fortran 2003: DC or DP "
"descriptor not allowed");
/* Fall through. */
case FMT_S:
case FMT_SS:
case FMT_SP:
case FMT_BN:
case FMT_BZ:
get_fnode (fmt, &head, &tail, t);
tail->repeat = 1;
goto between_desc;
case FMT_COLON:
get_fnode (fmt, &head, &tail, FMT_COLON);
tail->repeat = 1;
goto optional_comma;
case FMT_SLASH:
get_fnode (fmt, &head, &tail, FMT_SLASH);
tail->repeat = 1;
tail->u.r = 1;
goto optional_comma;
case FMT_DOLLAR:
get_fnode (fmt, &head, &tail, FMT_DOLLAR);
tail->repeat = 1;
notify_std (&dtp->common, GFC_STD_GNU, "Extension: $ descriptor");
goto between_desc;
case FMT_T:
case FMT_TL:
case FMT_TR:
t2 = format_lex (fmt);
if (t2 != FMT_POSINT)
{
fmt->error = posint_required;
goto finished;
}
get_fnode (fmt, &head, &tail, t);
tail->u.n = fmt->value;
tail->repeat = 1;
goto between_desc;
case FMT_I:
case FMT_B:
case FMT_O:
case FMT_Z:
case FMT_E:
case FMT_EN:
case FMT_ES:
case FMT_D:
case FMT_L:
case FMT_A:
case FMT_F:
case FMT_G:
repeat = 1;
*seen_dd = true;
goto data_desc;
case FMT_H:
get_fnode (fmt, &head, &tail, FMT_STRING);
if (fmt->format_string_len < 1)
{
fmt->error = bad_hollerith;
goto finished;
}
tail->u.string.p = fmt->format_string;
tail->u.string.length = 1;
tail->repeat = 1;
fmt->format_string++;
fmt->format_string_len--;
goto between_desc;
case FMT_END:
fmt->error = unexpected_end;
goto finished;
case FMT_BADSTRING:
goto finished;
case FMT_RPAREN:
goto finished;
default:
fmt->error = unexpected_element;
goto finished;
}
/* In this state, t must currently be a data descriptor. Deal with
things that can/must follow the descriptor */
data_desc:
switch (t)
{
case FMT_L:
t = format_lex (fmt);
if (t != FMT_POSINT)
{
if (notification_std(GFC_STD_GNU) == NOTIFICATION_ERROR)
{
fmt->error = posint_required;
goto finished;
}
else
{
fmt->saved_token = t;
fmt->value = 1; /* Default width */
notify_std (&dtp->common, GFC_STD_GNU, posint_required);
}
}
get_fnode (fmt, &head, &tail, FMT_L);
tail->u.n = fmt->value;
tail->repeat = repeat;
break;
case FMT_A:
t = format_lex (fmt);
if (t == FMT_ZERO)
{
fmt->error = zero_width;
goto finished;
}
if (t != FMT_POSINT)
{
fmt->saved_token = t;
fmt->value = -1; /* Width not present */
}
get_fnode (fmt, &head, &tail, FMT_A);
tail->repeat = repeat;
tail->u.n = fmt->value;
break;
case FMT_D:
case FMT_E:
case FMT_F:
case FMT_G:
case FMT_EN:
case FMT_ES:
get_fnode (fmt, &head, &tail, t);
tail->repeat = repeat;
u = format_lex (fmt);
if (t == FMT_G && u == FMT_ZERO)
{
if (notification_std (GFC_STD_F2008) == NOTIFICATION_ERROR
|| dtp->u.p.mode == READING)
{
fmt->error = zero_width;
goto finished;
}
tail->u.real.w = 0;
u = format_lex (fmt);
if (u != FMT_PERIOD)
{
fmt->saved_token = u;
break;
}
u = format_lex (fmt);
if (u != FMT_POSINT)
{
fmt->error = posint_required;
goto finished;
}
tail->u.real.d = fmt->value;
break;
}
if (t == FMT_F && dtp->u.p.mode == WRITING)
{
if (u != FMT_POSINT && u != FMT_ZERO)
{
fmt->error = nonneg_required;
goto finished;
}
}
else if (u != FMT_POSINT)
{
fmt->error = posint_required;
goto finished;
}
tail->u.real.w = fmt->value;
t2 = t;
t = format_lex (fmt);
if (t != FMT_PERIOD)
{
/* We treat a missing decimal descriptor as 0. Note: This is only
allowed if -std=legacy, otherwise an error occurs. */
if (compile_options.warn_std != 0)
{
fmt->error = period_required;
goto finished;
}
fmt->saved_token = t;
tail->u.real.d = 0;
tail->u.real.e = -1;
break;
}
t = format_lex (fmt);
if (t != FMT_ZERO && t != FMT_POSINT)
{
fmt->error = nonneg_required;
goto finished;
}
tail->u.real.d = fmt->value;
tail->u.real.e = -1;
if (t2 == FMT_D || t2 == FMT_F)
break;
/* Look for optional exponent */
t = format_lex (fmt);
if (t != FMT_E)
fmt->saved_token = t;
else
{
t = format_lex (fmt);
if (t != FMT_POSINT)
{
fmt->error = "Positive exponent width required in format";
goto finished;
}
tail->u.real.e = fmt->value;
}
break;
case FMT_H:
if (repeat > fmt->format_string_len)
{
fmt->error = bad_hollerith;
goto finished;
}
get_fnode (fmt, &head, &tail, FMT_STRING);
tail->u.string.p = fmt->format_string;
tail->u.string.length = repeat;
tail->repeat = 1;
fmt->format_string += fmt->value;
fmt->format_string_len -= repeat;
break;
case FMT_I:
case FMT_B:
case FMT_O:
case FMT_Z:
get_fnode (fmt, &head, &tail, t);
tail->repeat = repeat;
t = format_lex (fmt);
if (dtp->u.p.mode == READING)
{
if (t != FMT_POSINT)
{
fmt->error = posint_required;
goto finished;
}
}
else
{
if (t != FMT_ZERO && t != FMT_POSINT)
{
fmt->error = nonneg_required;
goto finished;
}
}
tail->u.integer.w = fmt->value;
tail->u.integer.m = -1;
t = format_lex (fmt);
if (t != FMT_PERIOD)
{
fmt->saved_token = t;
}
else
{
t = format_lex (fmt);
if (t != FMT_ZERO && t != FMT_POSINT)
{
fmt->error = nonneg_required;
goto finished;
}
tail->u.integer.m = fmt->value;
}
if (tail->u.integer.w != 0 && tail->u.integer.m > tail->u.integer.w)
{
fmt->error = "Minimum digits exceeds field width";
goto finished;
}
break;
default:
fmt->error = unexpected_element;
goto finished;
}
/* Between a descriptor and what comes next */
between_desc:
t = format_lex (fmt);
switch (t)
{
case FMT_COMMA:
goto format_item;
case FMT_RPAREN:
goto finished;
case FMT_SLASH:
case FMT_COLON:
get_fnode (fmt, &head, &tail, t);
tail->repeat = 1;
goto optional_comma;
case FMT_END:
fmt->error = unexpected_end;
goto finished;
default:
/* Assume a missing comma, this is a GNU extension */
goto format_item_1;
}
/* Optional comma is a weird between state where we've just finished
reading a colon, slash or P descriptor. */
optional_comma:
t = format_lex (fmt);
switch (t)
{
case FMT_COMMA:
break;
case FMT_RPAREN:
goto finished;
default: /* Assume that we have another format item */
fmt->saved_token = t;
break;
}
goto format_item;
finished:
*save_ok = saveit;
return head;
}
static fnode *
parse_format_list (void)
{
fnode *head, *tail;
format_token t, u, t2;
int repeat;
head = tail = NULL;
/* Get the next format item */
format_item:
t = format_lex ();
format_item_1:
switch (t)
{
case FMT_POSINT:
repeat = value;
t = format_lex ();
switch (t)
{
case FMT_LPAREN:
get_fnode (&head, &tail, FMT_LPAREN);
tail->repeat = repeat;
tail->u.child = parse_format_list ();
if (error != NULL)
goto finished;
goto between_desc;
case FMT_SLASH:
get_fnode (&head, &tail, FMT_SLASH);
tail->repeat = repeat;
goto optional_comma;
case FMT_X:
get_fnode (&head, &tail, FMT_X);
tail->repeat = 1;
tail->u.k = value;
goto between_desc;
case FMT_P:
goto p_descriptor;
default:
goto data_desc;
}
case FMT_LPAREN:
get_fnode (&head, &tail, FMT_LPAREN);
tail->repeat = 1;
tail->u.child = parse_format_list ();
if (error != NULL)
goto finished;
goto between_desc;
case FMT_SIGNED_INT: /* Signed integer can only precede a P format. */
case FMT_ZERO: /* Same for zero. */
t = format_lex ();
if (t != FMT_P)
{
error = "Expected P edit descriptor in format";
goto finished;
}
p_descriptor:
get_fnode (&head, &tail, FMT_P);
tail->u.k = value;
tail->repeat = 1;
t = format_lex ();
if (t == FMT_F || t == FMT_EN || t == FMT_ES || t == FMT_D
|| t == FMT_G || t == FMT_E)
{
repeat = 1;
goto data_desc;
}
saved_token = t;
goto optional_comma;
case FMT_P: /* P and X require a prior number */
error = "P descriptor requires leading scale factor";
goto finished;
case FMT_X:
/*
EXTENSION!
If we would be pedantic in the library, we would have to reject
an X descriptor without an integer prefix:
error = "X descriptor requires leading space count";
goto finished;
However, this is an extension supported by many Fortran compilers,
including Cray, HP, AIX, and IRIX. Therefore, we allow it in the
runtime library, and make the front end reject it if the compiler
is in pedantic mode. The interpretation of 'X' is '1X'.
*/
get_fnode (&head, &tail, FMT_X);
tail->repeat = 1;
tail->u.k = 1;
goto between_desc;
case FMT_STRING:
get_fnode (&head, &tail, FMT_STRING);
tail->u.string.p = string;
tail->u.string.length = value;
tail->repeat = 1;
goto optional_comma;
case FMT_S:
case FMT_SS:
case FMT_SP:
case FMT_BN:
case FMT_BZ:
get_fnode (&head, &tail, t);
tail->repeat = 1;
goto between_desc;
case FMT_COLON:
get_fnode (&head, &tail, FMT_COLON);
tail->repeat = 1;
goto optional_comma;
case FMT_SLASH:
get_fnode (&head, &tail, FMT_SLASH);
tail->repeat = 1;
tail->u.r = 1;
goto optional_comma;
case FMT_DOLLAR:
get_fnode (&head, &tail, FMT_DOLLAR);
tail->repeat = 1;
notify_std (GFC_STD_GNU, "Extension: $ descriptor");
goto between_desc;
case FMT_T:
case FMT_TL:
case FMT_TR:
t2 = format_lex ();
if (t2 != FMT_POSINT)
{
error = posint_required;
goto finished;
}
get_fnode (&head, &tail, t);
tail->u.n = value;
tail->repeat = 1;
goto between_desc;
case FMT_I:
case FMT_B:
case FMT_O:
case FMT_Z:
case FMT_E:
case FMT_EN:
case FMT_ES:
case FMT_D:
case FMT_L:
case FMT_A:
case FMT_F:
case FMT_G:
repeat = 1;
goto data_desc;
case FMT_H:
get_fnode (&head, &tail, FMT_STRING);
if (format_string_len < 1)
{
error = bad_hollerith;
goto finished;
}
tail->u.string.p = format_string;
tail->u.string.length = 1;
tail->repeat = 1;
format_string++;
format_string_len--;
goto between_desc;
case FMT_END:
error = unexpected_end;
goto finished;
case FMT_BADSTRING:
goto finished;
case FMT_RPAREN:
goto finished;
default:
error = unexpected_element;
goto finished;
}
/* In this state, t must currently be a data descriptor. Deal with
things that can/must follow the descriptor */
data_desc:
switch (t)
{
case FMT_P:
t = format_lex ();
if (t == FMT_POSINT)
{
error = "Repeat count cannot follow P descriptor";
goto finished;
}
saved_token = t;
get_fnode (&head, &tail, FMT_P);
goto optional_comma;
case FMT_L:
t = format_lex ();
if (t != FMT_POSINT)
{
error = posint_required;
goto finished;
}
get_fnode (&head, &tail, FMT_L);
tail->u.n = value;
tail->repeat = repeat;
break;
case FMT_A:
t = format_lex ();
if (t != FMT_POSINT)
{
saved_token = t;
value = -1; /* Width not present */
}
get_fnode (&head, &tail, FMT_A);
tail->repeat = repeat;
tail->u.n = value;
break;
case FMT_D:
case FMT_E:
case FMT_F:
case FMT_G:
case FMT_EN:
case FMT_ES:
get_fnode (&head, &tail, t);
tail->repeat = repeat;
u = format_lex ();
if (t == FMT_F || g.mode == WRITING)
{
if (u != FMT_POSINT && u != FMT_ZERO)
{
error = nonneg_required;
goto finished;
}
}
else
{
if (u != FMT_POSINT)
{
error = posint_required;
goto finished;
}
}
tail->u.real.w = value;
t2 = t;
t = format_lex ();
if (t != FMT_PERIOD)
{
error = period_required;
goto finished;
}
t = format_lex ();
if (t != FMT_ZERO && t != FMT_POSINT)
{
error = nonneg_required;
goto finished;
}
tail->u.real.d = value;
if (t == FMT_D || t == FMT_F)
break;
tail->u.real.e = -1;
/* Look for optional exponent */
t = format_lex ();
if (t != FMT_E)
saved_token = t;
else
{
t = format_lex ();
if (t != FMT_POSINT)
{
error = "Positive exponent width required in format";
goto finished;
}
tail->u.real.e = value;
}
break;
case FMT_H:
if (repeat > format_string_len)
{
error = bad_hollerith;
goto finished;
}
get_fnode (&head, &tail, FMT_STRING);
tail->u.string.p = format_string;
tail->u.string.length = repeat;
tail->repeat = 1;
format_string += value;
format_string_len -= repeat;
break;
case FMT_I:
case FMT_B:
case FMT_O:
case FMT_Z:
get_fnode (&head, &tail, t);
tail->repeat = repeat;
t = format_lex ();
if (g.mode == READING)
{
if (t != FMT_POSINT)
{
error = posint_required;
goto finished;
}
}
else
{
if (t != FMT_ZERO && t != FMT_POSINT)
{
error = nonneg_required;
goto finished;
}
}
tail->u.integer.w = value;
tail->u.integer.m = -1;
t = format_lex ();
if (t != FMT_PERIOD)
{
saved_token = t;
}
else
{
t = format_lex ();
if (t != FMT_ZERO && t != FMT_POSINT)
{
error = nonneg_required;
goto finished;
}
tail->u.integer.m = value;
}
if (tail->u.integer.w != 0 && tail->u.integer.m > tail->u.integer.w)
{
error = "Minimum digits exceeds field width";
goto finished;
}
break;
default:
error = unexpected_element;
goto finished;
}
/* Between a descriptor and what comes next */
between_desc:
t = format_lex ();
switch (t)
{
case FMT_COMMA:
goto format_item;
case FMT_RPAREN:
goto finished;
case FMT_SLASH:
get_fnode (&head, &tail, FMT_SLASH);
tail->repeat = 1;
/* Fall Through */
case FMT_COLON:
goto optional_comma;
case FMT_END:
error = unexpected_end;
goto finished;
default:
/* Assume a missing comma, this is a GNU extension */
goto format_item_1;
}
/* Optional comma is a weird between state where we've just finished
reading a colon, slash or P descriptor. */
optional_comma:
t = format_lex ();
switch (t)
{
case FMT_COMMA:
break;
case FMT_RPAREN:
goto finished;
default: /* Assume that we have another format item */
saved_token = t;
break;
}
goto format_item;
finished:
return head;
}
