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-rw-r--r--lib/mprintf.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/mprintf.c b/lib/mprintf.c
index 7af2f4a83..80735be51 100644
--- a/lib/mprintf.c
+++ b/lib/mprintf.c
@@ -764,7 +764,7 @@ static int dprintf_formatf(
if(prec > 0) {
width -= prec;
- while(prec-- > 0)
+ while(prec-- > 0 && w >= work)
*w-- = '0';
}
@@ -928,6 +928,8 @@ static int dprintf_formatf(
precision */
size_t maxprec = sizeof(work) - 2;
double val = p->data.dnum;
+ if(width > 0 && prec <= width)
+ maxprec -= width;
while(val >= 10.0) {
val /= 10;
maxprec--;
@@ -935,6 +937,8 @@ static int dprintf_formatf(
if(prec > (long)maxprec)
prec = (long)maxprec-1;
+ if(prec < 0)
+ prec = 0;
/* RECURSIVE USAGE */
len = curl_msnprintf(fptr, left, ".%ld", prec);
fptr += len;