From bf956b9cdf678c80dba315b06aaa9de473496473 Mon Sep 17 00:00:00 2001
From: h2zero <32826625+h2zero@users.noreply.github.com>
Date: Thu, 6 Apr 2023 14:32:50 -0600
Subject: [PATCH] Add index parameter for multiple manufacturer data sets.

Adds an index parameter to NimBLEAdvertisedDevice::getManufacturerData to allow for selecting from multiple instances in the advertisements.
Adds NimBLEAdvertisedDevice::getManufacturerDataCount to get the number of manufacturer data sets present in the advertised data.
---
 src/NimBLEAdvertisedDevice.cpp | 17 ++++++++++++++---
 src/NimBLEAdvertisedDevice.h   |  3 ++-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/NimBLEAdvertisedDevice.cpp b/src/NimBLEAdvertisedDevice.cpp
index 550d8d3..0c38ca4 100644
--- a/src/NimBLEAdvertisedDevice.cpp
+++ b/src/NimBLEAdvertisedDevice.cpp
@@ -159,12 +159,14 @@ uint16_t NimBLEAdvertisedDevice::getMaxInterval() {
 
 /**
  * @brief Get the manufacturer data.
- * @return The manufacturer data of the advertised device.
+ * @param [in] index The index of the of the manufacturer data set to get.
+ * @return The manufacturer data.
  */
-std::string NimBLEAdvertisedDevice::getManufacturerData() {
+std::string NimBLEAdvertisedDevice::getManufacturerData(uint8_t index) {
     size_t data_loc = 0;
+    index++;
 
-    if(findAdvField(BLE_HS_ADV_TYPE_MFG_DATA, 0, &data_loc) > 0) {
+    if(findAdvField(BLE_HS_ADV_TYPE_MFG_DATA, index, &data_loc) > 0) {
         ble_hs_adv_field *field = (ble_hs_adv_field *)&m_payload[data_loc];
         if(field->length > 1) {
             return std::string((char*)field->value, field->length - 1);
@@ -175,6 +177,15 @@ std::string NimBLEAdvertisedDevice::getManufacturerData() {
 } // getManufacturerData
 
 
+/**
+ * @brief Get the count of manufacturer data sets.
+ * @return The number of manufacturer data sets.
+ */
+uint8_t NimBLEAdvertisedDevice::getManufacturerDataCount() {
+    return findAdvField(BLE_HS_ADV_TYPE_MFG_DATA);
+} // getManufacturerDataCount
+
+
 /**
  * @brief Get the URI from the advertisement.
  * @return The URI data.
diff --git a/src/NimBLEAdvertisedDevice.h b/src/NimBLEAdvertisedDevice.h
index 834c3e5..43d59eb 100644
--- a/src/NimBLEAdvertisedDevice.h
+++ b/src/NimBLEAdvertisedDevice.h
@@ -50,7 +50,8 @@ public:
     uint16_t        getAdvInterval();
     uint16_t        getMinInterval();
     uint16_t        getMaxInterval();
-    std::string     getManufacturerData();
+    uint8_t         getManufacturerDataCount();
+    std::string     getManufacturerData(uint8_t index = 0);
     std::string     getURI();
 
     /**