Index: build_run.h
===================================================================
--- build_run.h	(revision 15194)
+++ build_run.h	(revision 15195)
@@ -26,6 +26,8 @@
  *
  */
 
+#include <genht/htsp.h>
+
 void pcb_quit_app(void);
 
 char *pcb_get_info_program(void);
@@ -42,3 +44,53 @@
 const char *pcb_author(void);
 
 void pcb_catch_signal(int Signal);
+
+
+
+/*** info on where files are loaded from ***/
+
+/* Hash-in-hash tree with the top tree being categories. */
+
+typedef enum pcb_file_loaded_type_e {
+	PCB_FLT_CATEGORY,
+	PCB_FLT_FILE
+} pcb_file_loaded_type_t;
+
+typedef struct pcb_file_loaded_s pcb_file_loaded_t;
+
+struct pcb_file_loaded_s {
+	char *name; /* same as the hash key; strdup'd */
+	pcb_file_loaded_type_t type;
+	union {
+		struct {
+			htsp_t children;
+		} category;
+		struct {
+			char *path;
+			char *desc;
+		} file;
+	} data;
+};
+
+extern htsp_t pcb_file_loaded;
+
+/* Return the category called name; if doesn't exist and alloc is 1,
+   allocate it it (else return NULL) */
+pcb_file_loaded_t *pcb_file_loaded_category(const char *name, int alloc);
+
+/* clear the subtree of a category, keeping the category; return 0 on success */
+int pcb_file_loaded_clear(pcb_file_loaded_t *cat);
+int pcb_file_loaded_clear_at(const char *catname);
+
+/* clear the subtree of a category, keeping the category; return 0 on success */
+int pcb_file_loaded_set(pcb_file_loaded_t *cat, const char *name, const char *path, const char *desc);
+int pcb_file_loaded_set_at(const char *catname, const char *name, const char *path, const char *desc);
+
+/* remove an entry */
+int pcb_file_loaded_del(pcb_file_loaded_t *cat, const char *name);
+
+
+/* called once, from main */
+void pcb_file_loaded_init(void);
+void pcb_file_loaded_uninit(void);
+