enum VarCacheIdx {
	VDateStyle = 0,
	VClientEncoding,
	VTimeZone,
	VStdStr,
	VAppName,
	NumVars
};

typedef struct VarCache VarCache;

struct VarCache {
	struct PStr *var_list[NumVars];
};

bool varcache_set(VarCache *cache, const char *key, const char *value) /* _MUSTCHECK */;
bool varcache_apply(PgSocket *server, PgSocket *client, bool *changes_p) _MUSTCHECK;
void varcache_fill_unset(VarCache *src, PgSocket *dst);
void varcache_clean(VarCache *cache);
void varcache_add_params(PktBuf *pkt, VarCache *vars);