plugin: New ksym_new_fast() function added.

It's inline alias for the
"ksym_new_ext(name, function, KSYM_USERDEFINED_PERMANENT,
KSYM_SYNC, KSYM_SILENT)" and targeted to syms like PTYPE checkers,
simple completion and help functions that can write to the text
buffer but not to the stdout. It helps to eliminate fork()s.

klish/kscheme/ksym.c

@@ -43,7 +43,8 @@ KGET(sym, bool_t, silent);
 KSET(sym, bool_t, silent);
 
 
-ksym_t *ksym_new(const char *name, ksym_fn function)
+ksym_t *ksym_new_ext(const char *name, ksym_fn function,
+	tri_t permanent, tri_t sync, bool_t silent)
 {
 	ksym_t *sym = NULL;
 
@@ -58,26 +59,9 @@ ksym_t *ksym_new(const char *name, ksym_fn function)
 	// Initialize
 	sym->name = faux_str_dup(name);
 	sym->function = function;
-	sym->permanent = TRI_UNDEFINED;
-	sym->sync = TRI_UNDEFINED;
-	sym->silent = BOOL_FALSE;
-
-	return sym;
-}
-
-
-ksym_t *ksym_new_ext(const char *name, ksym_fn function,
-	tri_t permanent, tri_t sync, bool_t silent)
-{
-	ksym_t *sym = NULL;
-
-	sym = ksym_new(name, function);
-	if (!sym)
-		return NULL;
-
-	ksym_set_permanent(sym, permanent);
-	ksym_set_sync(sym, sync);
-	ksym_set_silent(sym, silent);
+	sym->permanent = permanent;
+	sym->sync = sync;
+	sym->silent = silent;
 
 	return sym;
 }

klish/ksym.h

@@ -31,11 +31,28 @@ typedef int (*ksym_fn)(kcontext_t *context);
 C_DECL_BEGIN
 
 // ksym_t
-ksym_t *ksym_new(const char *name, ksym_fn function);
 ksym_t *ksym_new_ext(const char *name, ksym_fn function,
 	tri_t permanent, tri_t sync, bool_t silent);
 void ksym_free(ksym_t *sym);
 
+
+// Typical sym definition for external plugins.
+static inline ksym_t *ksym_new(const char *name, ksym_fn function)
+{
+	return ksym_new_ext(name, function, KSYM_USERDEFINED_PERMANENT,
+		KSYM_USERDEFINED_SYNC, KSYM_NONSILENT);
+}
+
+
+// Typical definition for internal syms like PTYPE checkers, simple completion
+// and help functions that can write to text buffer but not to stdout.
+static inline ksym_t *ksym_new_fast(const char *name, ksym_fn function)
+{
+	return ksym_new_ext(name, function, KSYM_USERDEFINED_PERMANENT,
+		KSYM_SYNC, KSYM_SILENT);
+}
+
+
 const char *ksym_name(const ksym_t *sym);
 
 ksym_fn ksym_function(const ksym_t *sym);