-/* Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
Contributed by Andy Vaught
Write float code factoring to this file by Jerry DeLisle
F2003 I/O support contributed by Jerry DeLisle
/* Output a real number according to its format which is FMT_G free. */
-static void
+static try
output_float (st_parameter_dt *dtp, const fnode *f, char *buffer, size_t size,
int sign_bit, bool zero_flag, int ndigits, int edigits)
{
/* Make sure zero comes out as 0.0e0. */
if (zero_flag)
- {
- e = 0;
- if (compile_options.sign_zero == 1)
- sign = calculate_sign (dtp, sign_bit);
- else
- sign = calculate_sign (dtp, 0);
-
- /* Handle special cases. */
- if (w == 0)
- w = d + 2;
-
- /* For this one we choose to not output a decimal point.
- F95 10.5.1.2.1 */
- if (w == 1 && ft == FMT_F)
- {
- out = write_block (dtp, w);
- if (out == NULL)
- return;
-
- if (unlikely (is_char4_unit (dtp)))
- {
- gfc_char4_t *out4 = (gfc_char4_t *) out;
- *out4 = '0';
- return;
- }
-
- *out = '0';
- return;
- }
-
- }
+ e = 0;
/* Normalize the fractional component. */
buffer[2] = buffer[1];
{
generate_error (&dtp->common, LIBERROR_FORMAT, "Precision not "
"greater than zero in format specifier 'E' or 'D'");
- return;
+ return FAILURE;
}
if (i <= -d || i >= d + 2)
{
generate_error (&dtp->common, LIBERROR_FORMAT, "Scale factor "
"out of range in format specifier 'E' or 'D'");
- return;
+ return FAILURE;
}
if (!zero_flag)
else
edigits = 0;
- /* Zero values always output as positive, even if the value was negative
- before rounding. */
+ /* Scan the digits string and count the number of zeros. If we make it
+ all the way through the loop, we know the value is zero after the
+ rounding completed above. */
for (i = 0; i < ndigits; i++)
{
if (digits[i] != '0')
break;
}
+
+ /* To format properly, we need to know if the rounded result is zero and if
+ so, we set the zero_flag which may have been already set for
+ actual zero. */
if (i == ndigits)
{
+ zero_flag = true;
/* The output is zero, so set the sign according to the sign bit unless
-fno-sign-zero was specified. */
if (compile_options.sign_zero == 1)
sign = calculate_sign (dtp, 0);
}
- /* Pick a field size if none was specified. */
+ /* Pick a field size if none was specified, taking into account small
+ values that may have been rounded to zero. */
if (w <= 0)
- w = nbefore + nzero + nafter + (sign != S_NONE ? 2 : 1);
+ {
+ if (zero_flag)
+ w = d + (sign != S_NONE ? 2 : 1) + (d == 0 ? 1 : 0);
+ else
+ {
+ w = nbefore + nzero + nafter + (sign != S_NONE ? 2 : 1);
+ w = w == 1 ? 2 : w;
+ }
+ }
/* Work out how much padding is needed. */
nblanks = w - (nbefore + nzero + nafter + edigits + 1);
/* Create the ouput buffer. */
out = write_block (dtp, w);
if (out == NULL)
- return;
+ return FAILURE;
/* Check the value fits in the specified field width. */
- if (nblanks < 0 || edigits == -1)
+ if (nblanks < 0 || edigits == -1 || w == 1 || (w == 2 && sign != S_NONE))
{
if (unlikely (is_char4_unit (dtp)))
{
gfc_char4_t *out4 = (gfc_char4_t *) out;
memset4 (out4, '*', w);
- return;
+ return FAILURE;
}
star_fill (out, w);
- return;
+ return FAILURE;
}
/* See if we have space for a zero before the decimal point. */
memset4 (out4, ' ' , nblanks);
dtp->u.p.no_leading_blank = 0;
}
- return;
+ return SUCCESS;
} /* End of character(kind=4) internal unit code. */
/* Pad to full field width. */
#undef STR
#undef STR1
#undef MIN_FIELD_WIDTH
+ return SUCCESS;
}
{
char * p, fin;
int nb = 0;
+ sign_t sign;
+ int mark;
if (f->format != FMT_B && f->format != FMT_O && f->format != FMT_Z)
{
+ sign = calculate_sign (dtp, sign_bit);
+ mark = (sign == S_PLUS || sign == S_MINUS) ? 8 : 7;
+
nb = f->u.real.w;
/* If the field width is zero, the processor must select a width
not zero. 4 is chosen to allow output of '-Inf' or '+Inf' */
- if (nb == 0) nb = 4;
+ if (nb == 0)
+ {
+ if (isnan_flag)
+ nb = 3;
+ else
+ nb = (sign == S_PLUS || sign == S_MINUS) ? 4 : 3;
+ }
p = write_block (dtp, nb);
if (p == NULL)
return;
if (unlikely (is_char4_unit (dtp)))
{
gfc_char4_t *p4 = (gfc_char4_t *) p;
- if (nb > 8)
+
+ if (nb > mark)
/* We have room, so output 'Infinity' */
memcpy4 (p4 + nb - 8, "Infinity", 8);
else
- /* For the case of width equals 8, there is not enough room
+ /* For the case of width equals mark, there is not enough room
for the sign and 'Infinity' so we go with 'Inf' */
memcpy4 (p4 + nb - 3, "Inf", 3);
- if (nb < 9 && nb > 3)
- /* Put the sign in front of Inf */
- p4[nb - 4] = (gfc_char4_t) fin;
- else if (nb > 8)
- /* Put the sign in front of Infinity */
- p4[nb - 9] = (gfc_char4_t) fin;
+ if (sign == S_PLUS || sign == S_MINUS)
+ {
+ if (nb < 9 && nb > 3)
+ /* Put the sign in front of Inf */
+ p4[nb - 4] = (gfc_char4_t) fin;
+ else if (nb > 8)
+ /* Put the sign in front of Infinity */
+ p4[nb - 9] = (gfc_char4_t) fin;
+ }
return;
}
- if (nb > 8)
+ if (nb > mark)
/* We have room, so output 'Infinity' */
memcpy(p + nb - 8, "Infinity", 8);
else
for the sign and 'Infinity' so we go with 'Inf' */
memcpy(p + nb - 3, "Inf", 3);
- if (nb < 9 && nb > 3)
- p[nb - 4] = fin; /* Put the sign in front of Inf */
- else if (nb > 8)
- p[nb - 9] = fin; /* Put the sign in front of Infinity */
+ if (sign == S_PLUS || sign == S_MINUS)
+ {
+ if (nb < 9 && nb > 3)
+ p[nb - 4] = fin; /* Put the sign in front of Inf */
+ else if (nb > 8)
+ p[nb - 9] = fin; /* Put the sign in front of Infinity */
+ }
}
else
{
GFC_REAL_ ## x rexp_d;\
int low, high, mid;\
int ubound, lbound;\
- char *p;\
+ char *p, pad = ' ';\
int save_scale_factor, nb = 0;\
+ try result;\
\
save_scale_factor = dtp->u.p.scale_factor;\
newf = (fnode *) get_mem (sizeof (fnode));\
}\
}\
\
+ if (e > 4)\
+ e = 4;\
if (e < 0)\
nb = 4;\
else\
nb = e + 2;\
\
+ nb = nb >= w ? 0 : nb;\
newf->format = FMT_F;\
newf->u.real.w = f->u.real.w - nb;\
\
dtp->u.p.scale_factor = 0;\
\
finish:\
- output_float (dtp, newf, buffer, size, sign_bit, zero_flag, ndigits, \
- edigits);\
+ result = output_float (dtp, newf, buffer, size, sign_bit, zero_flag, \
+ ndigits, edigits);\
dtp->u.p.scale_factor = save_scale_factor;\
\
free (newf);\
p = write_block (dtp, nb);\
if (p == NULL)\
return;\
+ if (result == FAILURE)\
+ pad = '*';\
if (unlikely (is_char4_unit (dtp)))\
{\
gfc_char4_t *p4 = (gfc_char4_t *) p;\
- memset4 (p4, ' ', nb);\
+ memset4 (p4, pad, nb);\
}\
else\
- memset (p, ' ', nb);\
+ memset (p, pad, nb);\
}\
}\
#endif
+#if defined(GFC_REAL_16_IS_FLOAT128)
+#define DTOAQ \
+__qmath_(quadmath_snprintf) (buffer, sizeof buffer, \
+ "%+-#" STR(MIN_FIELD_WIDTH) ".*" \
+ "Qe", ndigits - 1, tmp);
+#endif
+
#define WRITE_FLOAT(x,y)\
{\
GFC_REAL_ ## x tmp;\
write_float (st_parameter_dt *dtp, const fnode *f, const char *source, int len)
{
-#if defined(HAVE_GFC_REAL_16) && __LDBL_DIG__ > 18
+#if defined(HAVE_GFC_REAL_16) || __LDBL_DIG__ > 18
# define MIN_FIELD_WIDTH 46
#else
# define MIN_FIELD_WIDTH 31
#endif
#ifdef HAVE_GFC_REAL_16
case 16:
+# ifdef GFC_REAL_16_IS_FLOAT128
+ WRITE_FLOAT(16,Q)
+# else
WRITE_FLOAT(16,L)
+# endif
break;
#endif
default:
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