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1999-12-19  Ulrich Drepper  <drepper@cygnus.com>

	* stdio-common/printf_fp.c (__printf_fp): Allocate buffer to
	generate mantissa output in using malloc if it is larger than
	20000 characters.
	Reported by Jim Meyering <meyering@ascend.com>.
This commit is contained in:
Ulrich Drepper 1999-12-19 08:29:56 +00:00
parent e9e9b245b9
commit b526f8ac5f
2 changed files with 24 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
1999-12-19 Ulrich Drepper <drepper@cygnus.com>
* stdio-common/printf_fp.c (__printf_fp): Allocate buffer to
generate mantissa output in using malloc if it is larger than
20000 characters.
Reported by Jim Meyering <meyering@ascend.com>.
1999-12-18 Ulrich Drepper <drepper@cygnus.com>
* misc/sys/cdefs.h: Define __attribute_malloc__ according to

19
stdio-common/printf_fp.c
View File

@ -747,6 +747,7 @@ __printf_fp (FILE *fp,
{
int width = info->width;
char *buffer, *startp, *cp;
int buffer_malloced;
int chars_needed;
int expscale;
int intdig_max, intdig_no = 0;
@ -816,8 +817,18 @@ __printf_fp (FILE *fp,
/* Allocate buffer for output. We need two more because while rounding
it is possible that we need two more characters in front of all the
other output. */
buffer = alloca (2 + chars_needed);
other output. If the amount of memory we have to allocate is too
large use `malloc' instead of `alloca'. */
buffer_malloced = chars_needed > 20000;
if (buffer_malloced)
{
buffer = (char *) malloc (2 + chars_needed);
if (buffer == NULL)
/* Signal an error to the caller. */
return -1;
}
else
buffer = (char *) alloca (2 + chars_needed);
cp = startp = buffer + 2; /* Let room for rounding. */
/* Do the real work: put digits in allocated buffer. */
@ -1025,6 +1036,10 @@ __printf_fp (FILE *fp,
if (info->left && width > 0)
PADN (info->pad, width);
/* Free the memory if necessary. */
if (buffer_malloced)
free (buffer);
}
return done;
}