From 03aa193722cdebdd56b13b47db5e6adab7fb3976 Mon Sep 17 00:00:00 2001
From: Stefan Rueger <stefan.rueger@urclocks.com>
Date: Thu, 2 Apr 2026 23:12:17 +0100
Subject: [PATCH] Introduce int (*updatehook)()

---
 src/libavrdude.h | 3 +++
 src/pgm.c        | 1 +
 src/update.c     | 3 +++
 3 files changed, 7 insertions(+)

diff --git a/src/libavrdude.h b/src/libavrdude.h
index 9ba7ca23..358ad76c 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -981,6 +981,8 @@ typedef struct {
   unsigned long ms[LED_N];      // Time in ms after last physical change
 } Leds;
 
+typedef struct update UPDATE;
+
 /*
  * Any changes in PROGRAMMER, please also ensure changes are made in
  *  - lexer.l
@@ -1077,6 +1079,7 @@ typedef struct programmer {
   void (*teardown)(PROGRAMMER *pgm);
   int (*flash_readhook)(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *flm,
     const char *fname, int size);
+  int (*updatehook)(const PROGRAMMER *pgm, const AVRPART *p, const UPDATE *upd, int flags);
 
   // Cached r/w API for terminal reads/writes
   int (*write_byte_cached)(const PROGRAMMER *pgm, const AVRPART *p, const AVRMEM *m,
diff --git a/src/pgm.c b/src/pgm.c
index 72c5413e..c20703b6 100644
--- a/src/pgm.c
+++ b/src/pgm.c
@@ -119,6 +119,7 @@ void pgm_init_functions(PROGRAMMER *pgm) {
   pgm->parseextparams = NULL;
   pgm->readonly = NULL;
   pgm->flash_readhook = NULL;
+  pgm->updatehook = NULL;
 }
 
 PROGRAMMER *pgm_new(void) {
diff --git a/src/update.c b/src/update.c
index 0fb5ac2c..cf127615 100644
--- a/src/update.c
+++ b/src/update.c
@@ -640,6 +640,9 @@ int do_op(const PROGRAMMER *pgm, const AVRPART *p, const UPDATE *upd, enum updat
   Filestats fs;
   const char *umstr = upd->memstr;
 
+  if(pgm->updatehook)
+    pgm->updatehook(pgm, p, upd, flags);
+
   if(!(flags & UF_NOHEADING)) {
     char *heading = update_str(upd);