add ssh_set_error_oom and ssh_set_error_invalid

Signed-off-by: Andreas Schneider <mail@cynapses.org>

include/libssh/priv.h

@@ -123,6 +123,8 @@ int ssh_config_parse_file(ssh_options opt, const char *filename);
 
 /* errors.c */
 void ssh_set_error(void *error, int code, const char *descr, ...) PRINTF_ATTRIBUTE(3, 4);
+void ssh_set_error_oom(void *);
+void ssh_set_error_invalid(void *, const char *);
 
 /* in crypt.c */
 uint32_t packet_decrypt_len(ssh_session session,char *crypted);

libssh/error.c

@@ -41,7 +41,7 @@
  *
  * @brief Registers an error with a description.
  *
- * @param  error       The class of error.
+ * @param  error       The place to store the error.
  *
  * @param  code        The class of error.
  *
@@ -58,6 +58,35 @@ void ssh_set_error(void *error, int code, const char *descr, ...) {
   err->error_code = code;
 }
 
+/**
+ * @internal
+ *
+ * @brief Registers an out of memory error
+ *
+ * @param  error       The place to store the error.
+ *
+ */
+void ssh_set_error_oom(void *error) {
+  struct error_struct *err = error;
+
+  strcpy(err->error_buffer, "Out of memory");
+  err->error_code = SSH_FATAL;
+}
+
+/**
+ * @internal
+ *
+ * @brief Registers an out of memory error
+ *
+ * @param  error       The place to store the error.
+ *
+ * @param  function    The function the error happened in.
+ *
+ */
+void ssh_set_error_invalid(void *error, const char *function) {
+  ssh_set_error(error, SSH_FATAL, "Invalid argument in %s", function);
+}
+
 /**
  * @brief Retrieve the error text message from the last error.
  *