Ofcourse that won't work as it'll break the CRC, so we truncate the last byte after checking the whole thing is correct

1 files changed, 3 insertions, 2 deletions

diff --git a/flash.c b/flash.c
index 57f8fc0..48470bb 100644
--- a/flash.c
+++ b/flash.c
@@ -235,6 +235,7 @@ bool persistence_freeze(char* dest, void* data, unsigned int offset, unsigned in
 bool persistence_unfreeze(char* dest, void* result, unsigned int len, uint32_t version)
 {
 
+	bool truncatelastbyte = false;
 	int fd = open(dest, O_RDONLY);
 
 	// get the header
@@ -253,7 +254,7 @@ bool persistence_unfreeze(char* dest, void* result, unsigned int len, uint32_t v
 #if FROZENSMALLEROK
 		if (hdr.length < len) {
 			printf("frozen struct is %d bytes smaller than the requested size, removing end byte\n", len - hdr.length);
-			hdr.length -= 1;
+			truncatelastbyte = true;
 			goto hdrlengthok;
 		}
 #endif
@@ -298,7 +299,7 @@ hdrlengthok:
 	}
 
 	close(fd);
-	memcpy(result, tempresult, MIN(len, hdr.length));
+	memcpy(result, tempresult, MIN(len, truncatelastbyte ? (hdr.length - 1) : hdr.length));
 	g_free(tempresult);
 	return true;