options: change handling of "no-" options

Normally, all flag options can be negated by prepending a "no-", for
example "--no-opt" becomes "--opt=no". Some flag options can't actually
be negated, so add a CONF_TYPE_STORE option type to disallow the "no-"
fallback.

Do the same for choice options. Remove the explicit "no-" prefixed
options, add "no" as choice.

Move the handling of automatic "no-" options from parser-mpcmd.c to
m_config.c, and use it in m_config_set_option/m_config_parse_option.
This makes these options available in the config file. It also
simplifies sub-option parsing, because it doesn't need to handle "no-"
anymore.

1 files changed, 11 insertions, 0 deletions

diff --git a/core/m_config.h b/core/m_config.h
index de89803cac..8b9b0dc7f7 100644
--- a/core/m_config.h
+++ b/core/m_config.h
@@ -155,6 +155,17 @@ const struct m_option *m_config_get_option(const struct m_config *config,
 struct m_config_option *m_config_get_co(const struct m_config *config,
                                         struct bstr name);
 
+/*  Map options like "no-opt=" to "opt=no".
+ *  config The config object.
+ *  \param name The option's name. May be set to a new name.
+ *  \param param The option value. May be set to a new value.
+ *  \return The following error codes:
+ *          M_OPT_UNKNOWN: option not found
+ *          M_OPT_INVALID: parameter non-empty in map case, prevents the mapping
+ *          0: success, *name and *param have been changed (or not)
+ */
+int m_config_map_option(struct m_config *config, bstr *name, bstr *param);
+
 /*  Print a list of all registered options.
  *  \param config The config object.
  */