[Cryptech-Commits] [sw/stm32] 04/04: Make stm_flash_sector_num a little more efficient.

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paul at psgd.org pushed a commit to branch master
in repository sw/stm32.

commit fe94d97f705846ef809d4109b310c96d0b3bb1ac
Author: Paul Selkirk <paul at psgd.org>
AuthorDate: Tue Dec 20 19:06:29 2016 -0500

    Make stm_flash_sector_num a little more efficient.
---
 stm-flash.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/stm-flash.c b/stm-flash.c
index 991379b..fc79ea0 100644
--- a/stm-flash.c
+++ b/stm-flash.c
@@ -72,14 +72,15 @@ uint32_t flash_sector_offsets[FLASH_NUM_SECTORS + 1] = {
 
 int stm_flash_sector_num(const uint32_t offset)
 {
-    int i = FLASH_NUM_SECTORS;
+    int i;
 
-    while (i-- >= 0) {
-	if (offset >= flash_sector_offsets[i] &&
-	    offset < flash_sector_offsets[i + 1]) {
+    if (offset < flash_sector_offsets[0])
+        return -1;
+
+    for (i = 0; i < FLASH_NUM_SECTORS; ++i)
+	if (offset < flash_sector_offsets[i + 1])
 	    return i;
-	}
-    }
+
     return -1;
 }