Avoid passing NULL to memcpy

This commit is contained in:
Matt Johnston 2020-10-19 21:38:20 +08:00
parent 9f642e2bd4
commit d5cc5eb25c

View File

@ -39,44 +39,30 @@
/* Create (malloc) a new buffer of size */
buffer* buf_new(unsigned int size) {
buffer* buf;
if (size > BUF_MAX_SIZE) {
dropbear_exit("buf->size too big");
}
buf = (buffer*)m_malloc(sizeof(buffer)+size);
if (size > 0) {
buf->data = (unsigned char*)buf + sizeof(buffer);
} else {
buf->data = NULL;
}
buf->data = (unsigned char*)buf + sizeof(buffer);
buf->size = size;
return buf;
}
/* free the buffer's data and the buffer itself */
void buf_free(buffer* buf) {
m_free(buf);
}
/* overwrite the contents of the buffer to clear it */
void buf_burn(const buffer* buf) {
m_burn(buf->data, buf->size);
}
/* resize a buffer, pos and len will be repositioned if required when
* downsizing */
buffer* buf_resize(buffer *buf, unsigned int newsize) {
if (newsize > BUF_MAX_SIZE) {
dropbear_exit("buf->size too big");
}