bshell: re-organise build into three separate components

bshell: the front-end binary
bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts
bshell.core: contains the builtin commandlets and aliases

bshell.runtime/runtime/var-map.c

@@ -0,0 +1,35 @@
+#include "var-map.h"
+
+void var_map_cleanup(struct var_map *map)
+{
+}
+
+enum bshell_status var_map_put(struct var_map *map, bshell_variable *var)
+{
+	const char *name = bshell_variable_get_name(var);
+	struct var_map_entry *entry = malloc(sizeof *entry);
+	if (!entry) {
+		return BSHELL_ERR_NO_MEMORY;
+	}
+
+	memset(entry, 0x0, sizeof *entry);
+
+	entry->e_var = var;
+
+	fx_namemap_put(&map->m_vars, name, &entry->e_entry);
+	return BSHELL_SUCCESS;
+}
+
+bshell_variable *var_map_get(struct var_map *map, const char *name)
+{
+	fx_namemap_entry *e = fx_namemap_get(&map->m_vars, name);
+	if (!e) {
+		return NULL;
+	}
+
+	struct var_map_entry *entry = fx_unbox(
+		struct var_map_entry,
+		e,
+		e_entry);
+	return entry->e_var;
+}