1 files changed, 56 insertions, 0 deletions
diff --git a/src/lib/var-expand-private.h b/src/lib/var-expand-private.h
new file mode 100644
index 0000000..f02356a
--- /dev/null
+++ b/src/lib/var-expand-private.h
@@ -0,0 +1,56 @@
+#ifndef VAR_EXPAND_PRIVATE_H
+#define VAR_EXPAND_PRIVATE_H 1
+
+struct var_expand_context {
+	/* current variables */
+	const struct var_expand_table *table;
+	/* caller provided function table */
+	const struct var_expand_func_table *func_table;
+	/* caller provided context */
+	void *context;
+	/* last offset, negative counts from end*/
+	int offset;
+	/* last width, negative counts from end */
+	int width;
+	/* last zero padding */
+	bool zero_padding:1;
+};
+
+/* this can be used to register a *global* function that is
+   prepended to function table. These can be used to register some
+   special handling for keys.
+
+   you can call var_expand_with_funcs if you need to
+   expand something inside here.
+
+   return -1 on error, 0 on unknown variable, 1 on success
+*/
+typedef int
+var_expand_extension_func_t(struct var_expand_context *ctx,
+			    const char *key, const char *field,
+			    const char **result_r, const char **error_r);
+
+struct var_expand_extension_func_table {
+	const char *key;
+	var_expand_extension_func_t *func;
+};
+
+int var_expand_long(struct var_expand_context *ctx,
+		    const void *key_start, size_t key_len,
+		    const char **var_r, const char **error_r);
+
+void var_expand_extensions_init(void);
+void var_expand_extensions_deinit(void);
+
+/* Functions registered here are placed before in-built functions,
+   so you can include your own implementation of something.
+   Be careful. Use NULL terminated list.
+*/
+void var_expand_register_func_array(const struct var_expand_extension_func_table *funcs);
+void var_expand_unregister_func_array(const struct var_expand_extension_func_table *funcs);
+
+int var_expand_if(struct var_expand_context *ctx,
+		  const char *key, const char *field,
+		  const char **result_r, const char **error_r);
+
+#endif