X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Fvsnprintf.c;h=06536d177ff5e84c4765ff3c120caa7bc62a8242;hp=9eb869e78cb2b7dbb52c9eab259b0fba1670283c;hb=f6b6a83981cda2a6f20a945631be2d9a7a257192;hpb=715fe6b88a65aad9123e44860fef880700e7167d

diff --git a/functions/stdio/vsnprintf.c b/functions/stdio/vsnprintf.c
index 9eb869e..06536d1 100644
--- a/functions/stdio/vsnprintf.c
+++ b/functions/stdio/vsnprintf.c
@@ -32,7 +32,12 @@ int vsnprintf( char * _PDCLIB_restrict s, size_t n, const char * _PDCLIB_restric
         if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
         {
             /* No conversion specifier, print verbatim */
-            s[ status.i++ ] = *(format++);
+            if ( status.i < n )
+            {
+                s[ status.i ] = *format;
+            }
+            status.i++;
+            format++;
         }
         else
         {
@@ -40,7 +45,10 @@ int vsnprintf( char * _PDCLIB_restrict s, size_t n, const char * _PDCLIB_restric
             format = rc;
         }
     }
-    s[ status.i ] = '\0';
+    if ( status.i  < n )
+    {
+        s[ status.i ] = '\0';
+    }
     va_end( status.arg );
     return status.i;
 }