add makeBlobPath inline helper for esp32

Author: oltaco

examples/companion_radio/DataStore.cpp

@@ -564,13 +564,16 @@ bool DataStore::deleteBlobByKey(const uint8_t key[], int key_len) {
   return true; // this is just a stub on NRF52/STM32 platforms
 }
 #else
-uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]) {
-  char path[64];
+inline void makeBlobPath(const uint8_t key[], int key_len, char* path, size_t path_size) {
   char fname[18];
-
   if (key_len > 8) key_len = 8; // just use first 8 bytes (prefix)
   mesh::Utils::toHex(fname, key, key_len);
   sprintf(path, "/bl/%s", fname);
+}
+
+uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]) {
+  char path[64];
+  makeBlobPath(key, key_len, path, sizeof(path));
 
   if (_fs->exists(path)) {
     File f = openRead(_fs, path);
@@ -585,11 +588,7 @@ uint8_t DataStore::getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_b
 
 bool DataStore::putBlobByKey(const uint8_t key[], int key_len, const uint8_t src_buf[], uint8_t len) {
   char path[64];
-  char fname[18];
-
-  if (key_len > 8) key_len = 8; // just use first 8 bytes (prefix)
-  mesh::Utils::toHex(fname, key, key_len);
-  sprintf(path, "/bl/%s", fname);
+  makeBlobPath(key, key_len, path, sizeof(path));
 
   File f = openWrite(_fs, path);
   if (f) {
@@ -604,11 +603,7 @@ bool DataStore::putBlobByKey(const uint8_t key[], int key_len, const uint8_t src
 
 bool DataStore::deleteBlobByKey(const uint8_t key[], int key_len) {
   char path[64];
-  char fname[18];
-
-  if (key_len > 8) key_len = 8; // just use first 8 bytes (prefix)
-  mesh::Utils::toHex(fname, key, key_len);
-  sprintf(path, "/bl/%s", fname);
+  makeBlobPath(key, key_len, path, sizeof(path));
 
   _fs->remove(path);