vrahane commented on code in PR #3365:
URL: https://github.com/apache/mynewt-core/pull/3365#discussion_r1956637842


##########
sys/log/full/src/log_fcb_bmark.c:
##########
@@ -70,65 +121,247 @@ log_fcb_clear_bmarks(struct fcb_log *fcb_log)
 {
     fcb_log->fl_bset.lfs_size = 0;
     fcb_log->fl_bset.lfs_next = 0;
+    fcb_log->fl_bset.lfs_next_non_s = 0;
+    fcb_log->fl_bset.lfs_non_s_size = 0;
+    memset(fcb_log->fl_bset.lfs_bmarks, 0,
+           sizeof(struct log_fcb_bmark) *
+           fcb_log->fl_bset.lfs_cap);
 }
 
-const struct log_fcb_bmark *
-log_fcb_closest_bmark(const struct fcb_log *fcb_log, uint32_t index)
+struct log_fcb_bmark *
+log_fcb_get_bmarks(struct log *log, uint32_t *bmarks_size)
 {
-    const struct log_fcb_bmark *closest;
-    const struct log_fcb_bmark *bmark;
-    uint32_t min_diff;
+    struct fcb_log *fcb_log = (struct fcb_log *)log->l_arg;
+
+    *bmarks_size = fcb_log->fl_bset.lfs_cap;
+
+    return fcb_log->fl_bset.lfs_bmarks;
+}
+
+struct log_fcb_bmark *
+log_fcb_closest_bmark(struct fcb_log *fcb_log, uint32_t index,
+                      int *min_diff)
+{
+    struct log_fcb_bmark *closest;
+    struct log_fcb_bmark *bmark;
     uint32_t diff;
     int i;
 
-    min_diff = UINT32_MAX;
+    *min_diff = -1;
     closest = NULL;
 
+    /* This works for both sector as well as non-sector bmarks
+     * because we calculate the min diff and iterate to the end
+     * of the bmarks array keeping track of min diff
+     */
     for (i = 0; i < fcb_log->fl_bset.lfs_size; i++) {
         bmark = &fcb_log->fl_bset.lfs_bmarks[i];
+#if MYNEWT_VAL(LOG_FCB)
+        if (!fcb_log->fl_bset.lfs_bmarks[i].lfb_entry.fe_area) {
+            /* Previous closest bookmark is the closest one */
+            break;
+        }
+#elif MYNEWT_VAL(LOG_FCB2)
+        if (!fcb_log->fl_bset.lfs_bmarks[i].lfb_entry.fe_range) {
+            /* Previous closest bookmark is the closest one */
+            break;
+        }
+#endif
         if (bmark->lfb_index <= index) {
             diff = index - bmark->lfb_index;
-            if (diff < min_diff) {
-                min_diff = diff;
+            if (diff < *min_diff) {
+                *min_diff = diff;
                 closest = bmark;
+                MODLOG_INFO(LOG_MODULE_DEFAULT, "index: %u, closest bmark idx: 
%u, \n",
+                            (unsigned int)index,
+                            (unsigned int)bmark->lfb_index);
+                /* We found the exact match, no need to keep searching for a
+                 * better match
+                 */
+                if (*min_diff == 0) {
+                    break;
+                }
             }
         }
     }
 
     return closest;
 }
 
+#if MYNEWT_VAL(LOG_FCB_SECTOR_BOOKMARKS)
 #if MYNEWT_VAL(LOG_FCB)
-void
-log_fcb_add_bmark(struct fcb_log *fcb_log, const struct fcb_entry *entry,
-                  uint32_t index)
+static void
+log_fcb_insert_bmark(struct fcb_log *fcb_log, struct fcb_entry *entry,
+                     uint32_t index, bool sect_bmark, int pos)
 #elif MYNEWT_VAL(LOG_FCB2)
-void
-log_fcb_add_bmark(struct fcb_log *fcb_log, const struct fcb2_entry *entry,
-                  uint32_t index)
+static void
+log_fcb_insert_bmark(struct fcb_log *fcb_log, fcb2_entry *entry,
+                     uint32_t index, bool sect_bmark, int pos)
 #endif
 {
     struct log_fcb_bset *bset;
 
     bset = &fcb_log->fl_bset;
 
-    if (bset->lfs_cap == 0) {
-        return;
+    if (pos == bset->lfs_cap - 1) {
+        goto add;
     }
 
-    bset->lfs_bmarks[bset->lfs_next] = (struct log_fcb_bmark) {
+    memcpy(&bset->lfs_bmarks[pos + 1], &bset->lfs_bmarks[pos],
+           sizeof(bset->lfs_bmarks[0]) * bset->lfs_size - pos - 1);
+
+add:
+    bset->lfs_bmarks[pos] = (struct log_fcb_bmark) {
         .lfb_entry = *entry,
         .lfb_index = index,
+        .lfb_sect_bmark = sect_bmark
     };
 
     if (bset->lfs_size < bset->lfs_cap) {
         bset->lfs_size++;
     }
 
     bset->lfs_next++;
-    if (bset->lfs_next >= bset->lfs_cap) {
-        bset->lfs_next = 0;
+    bset->lfs_next %= bset->lfs_cap;
+}
+#endif
+
+#if MYNEWT_VAL(LOG_FCB)
+static void
+log_fcb_replace_bmark(struct fcb_log *fcb_log, struct fcb_entry *entry,
+                      uint32_t index, bool sect_bmark, int pos)
+#elif MYNEWT_VAL(LOG_FCB2)
+static void
+log_fcb_replace_bmark(struct fcb_log *fcb_log, struct fcb2_entry *entry,
+                      uint32_t index, bool sect_bmark, int pos)
+#endif
+{
+    int i = 0;
+    struct log_fcb_bset *bset = &fcb_log->fl_bset;
+    bool en_sect_bmark = sect_bmark & bset->lfs_en_sect_bmarks;
+
+#if MYNEWT_VAL(LOG_FCB_SECTOR_BOOKMARKS)
+    if (en_sect_bmark) {
+        for (i = fcb_log->fl_fcb.f_sector_cnt;
+             i < (bset->lfs_non_s_size + fcb_log->fl_fcb.f_sector_cnt);
+             i++) {
+            if (index == bset->lfs_bmarks[i].lfb_index) {
+                /* If index matches, no need to replace */
+                return;
+            }
+        }
+    } else
+#endif
+    if (!en_sect_bmark) {
+        for (i = 0; i < bset->lfs_non_s_size; i++) {
+            if (index == bset->lfs_bmarks[i].lfb_index) {
+                /* If index matches, no need to replace */
+                return;
+            }
+        }
     }

Review Comment:
   It was correct before, in an effort to make the code better I messed it up. 
Will fix it. Thanks, good catch.



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