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re PR libfortran/77393 (Revision r237735 changed the behavior of F0.0)

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2016-08-31  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/77393
	* io/write.c (kind_from_size): New function to calculate required buffer
	size based on kind type. (select_buffer, select_string): Use new
	function. (write_float_0, write_real, write_real_g0, write_complex):
	Adjust calls to pass parameters needed by new function.

From-SVN: r239900
This commit is contained in:
Jerry DeLisle 2016-08-31 17:45:26 +00:00
parent 7663cae227
commit d775696046
2 changed files with 68 additions and 17 deletions
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8
libgfortran/ChangeLog
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@ -1,3 +1,11 @@
2016-08-31 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/77393
* io/write.c (kind_from_size): New function to calculate required buffer
size based on kind type. (select_buffer, select_string): Use new
function. (write_float_0, write_real, write_real_g0, write_complex):
Adjust calls to pass parameters needed by new function.
2016-08-31 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Paul Thomas <pault@gcc.gnu.org>

77
libgfortran/io/write.c
View File

@ -1357,11 +1357,52 @@ get_precision (st_parameter_dt *dtp, const fnode *f, const char *source, int kin
return determine_en_precision (dtp, f, source, kind);
}
/* 4932 is the maximum exponent of long double and quad precision, 3
extra characters for the sign, the decimal point, and the
trailing null. Extra digits are added by the calling functions for
requested precision. Likewise for float and double. F0 editing produces
full precision output. */
static int
size_from_kind (st_parameter_dt *dtp, const fnode *f, int kind)
{
int size;
if (f->format == FMT_F && f->u.real.w == 0)
{
switch (kind)
{
case 4:
size = 38 + 3; /* These constants shown for clarity. */
break;
case 8:
size = 308 + 3;
break;
case 10:
size = 4932 + 3;
break;
case 16:
size = 4932 + 3;
break;
default:
internal_error (&dtp->common, "bad real kind");
break;
}
}
else
size = f->u.real.w + 1; /* One byte for a NULL character. */
return size;
}
static char *
select_buffer (int precision, char *buf, size_t *size)
select_buffer (st_parameter_dt *dtp, const fnode *f, int precision,
char *buf, size_t *size, int kind)
{
char *result;
*size = BUF_STACK_SZ / 2 + precision;
/* The buffer needs at least one more byte to allow room for normalizing. */
*size = size_from_kind (dtp, f, kind) + precision + 1;
if (*size > BUF_STACK_SZ)
result = xmalloc (*size);
else
@ -1370,10 +1411,11 @@ select_buffer (int precision, char *buf, size_t *size)
}
static char *
select_string (const fnode *f, char *buf, size_t *size)
select_string (st_parameter_dt *dtp, const fnode *f, char *buf, size_t *size,
int kind)
{
char *result;
*size = f->u.real.w + 1;
*size = size_from_kind (dtp, f, kind) + f->u.real.d;
if (*size > BUF_STACK_SZ)
result = xmalloc (*size);
else
@ -1397,6 +1439,7 @@ write_float_string (st_parameter_dt *dtp, char *fstr, size_t len)
memcpy (p, fstr, len);
}
static void
write_float_0 (st_parameter_dt *dtp, const fnode *f, const char *source, int kind)
{
@ -1409,10 +1452,10 @@ write_float_0 (st_parameter_dt *dtp, const fnode *f, const char *source, int kin
int precision = get_precision (dtp, f, source, kind);
/* String buffer to hold final result. */
result = select_string (f, str_buf, &res_len);
buffer = select_buffer (precision, buf_stack, &buf_size);
result = select_string (dtp, f, str_buf, &res_len, kind);
buffer = select_buffer (dtp, f, precision, buf_stack, &buf_size, kind);
get_float_string (dtp, f, source , kind, 0, buffer,
precision, buf_size, result, &res_len);
write_float_string (dtp, result, res_len);
@ -1527,11 +1570,11 @@ write_real (st_parameter_dt *dtp, const char *source, int kind)
int precision = get_precision (dtp, &f, source, kind);
/* String buffer to hold final result. */
result = select_string (&f, str_buf, &res_len);
/* scratch buffer to hold final result. */
buffer = select_buffer (precision, buf_stack, &buf_size);
result = select_string (dtp, &f, str_buf, &res_len, kind);
/* Scratch buffer to hold final result. */
buffer = select_buffer (dtp, &f, precision, buf_stack, &buf_size, kind);
get_float_string (dtp, &f, source , kind, 1, buffer,
precision, buf_size, result, &res_len);
write_float_string (dtp, result, res_len);
@ -1572,9 +1615,9 @@ write_real_g0 (st_parameter_dt *dtp, const char *source, int kind, int d)
int precision = get_precision (dtp, &f, source, kind);
/* String buffer to hold final result. */
result = select_string (&f, str_buf, &res_len);
result = select_string (dtp, &f, str_buf, &res_len, kind);
buffer = select_buffer (precision, buf_stack, &buf_size);
buffer = select_buffer (dtp, &f, precision, buf_stack, &buf_size, kind);
get_float_string (dtp, &f, source , kind, comp_d, buffer,
precision, buf_size, result, &res_len);
@ -1620,10 +1663,10 @@ write_complex (st_parameter_dt *dtp, const char *source, int kind, size_t size)
int precision = get_precision (dtp, &f, source, kind);
/* String buffers to hold final result. */
result1 = select_string (&f, str1_buf, &res_len1);
result2 = select_string (&f, str2_buf, &res_len2);
result1 = select_string (dtp, &f, str1_buf, &res_len1, kind);
result2 = select_string (dtp, &f, str2_buf, &res_len2, kind);
buffer = select_buffer (precision, buf_stack, &buf_size);
buffer = select_buffer (dtp, &f, precision, buf_stack, &buf_size, kind);
get_float_string (dtp, &f, source , kind, 0, buffer,
precision, buf_size, result1, &res_len1);