diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | stdio-common/printf_fp.c | 19 |
2 files changed, 24 insertions, 2 deletions
@@ -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 diff --git a/stdio-common/printf_fp.c b/stdio-common/printf_fp.c index 0a2efb7891..13598e3030 100644 --- a/stdio-common/printf_fp.c +++ b/stdio-common/printf_fp.c @@ -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; } |