Added set_expand_string() and set_number().

Helper functions to set REG_EXPAND_SZ and REG_DWORD values in the
registry.

registry.cpp

@@ -191,6 +191,28 @@ int expand_parameter(HKEY key, char *value, char *data, unsigned long datalen, b
   return expand_parameter(key, value, data, datalen, sanitise, true);
 }
 
+/*
+  Sets a string in the registry.
+  Returns: 0 if it was set.
+           1 on error.
+*/
+int set_expand_string(HKEY key, char *value, char *string) {
+  if (RegSetValueEx(key, value, 0, REG_EXPAND_SZ, (const unsigned char *) string, (unsigned long) strlen(string) + 1) == ERROR_SUCCESS) return 0;
+  log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, value, error_string(GetLastError()), 0);
+  return 1;
+}
+
+/*
+  Set an unsigned long in the registry.
+  Returns: 0 if it was set.
+           1 on error.
+*/
+int set_number(HKEY key, char *value, unsigned long number) {
+  if (RegSetValueEx(key, value, 0, REG_DWORD, (const unsigned char *) &number, sizeof(number)) == ERROR_SUCCESS) return 0;
+  log_event(EVENTLOG_ERROR_TYPE, NSSM_EVENT_SETVALUE_FAILED, value, error_string(GetLastError()), 0);
+  return 1;
+}
+
 /*
   Query an unsigned long from the registry.
   Returns:  1 if a number was retrieved.

registry.h

@@ -26,6 +26,8 @@ int create_exit_action(char *, const char *);
 int set_environment(char *, HKEY, char **);
 int expand_parameter(HKEY, char *, char *, unsigned long, bool, bool);
 int expand_parameter(HKEY, char *, char *, unsigned long, bool);
+int set_expand_string(HKEY, char *, char *);
+int set_number(HKEY, char *, unsigned long);
 int get_number(HKEY, char *, unsigned long *, bool);
 int get_number(HKEY, char *, unsigned long *);
 void override_milliseconds(char *, HKEY, char *, unsigned long *, unsigned long, unsigned long);