When the number of bytes written to the malloc'ed buffer is larger
than the argument string size, copy as many bytes as will fit
(including a terminating '\0'), rather than not copying anything.
This to make it satisfy the C99 spec.
diff --git a/Python/mysnprintf.c b/Python/mysnprintf.c
index a373f4e..02f9291 100644
--- a/Python/mysnprintf.c
+++ b/Python/mysnprintf.c
@@ -40,11 +40,11 @@
assert(len >= 0);
if ((size_t)len > size + 512)
Py_FatalError("Buffer overflow in PyOS_snprintf/PyOS_vsnprintf");
- if ((size_t)len > size) {
- PyMem_Free(buffer);
- return len - 1;
- }
- memcpy(str, buffer, len);
+ if ((size_t)len > size)
+ buffer[size-1] = '\0';
+ else
+ size = len;
+ memcpy(str, buffer, size);
PyMem_Free(buffer);
return len - 1;
}