From 438e626993fe86831b666a42b5f90731d5c26aeb Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Thu, 22 Nov 2018 22:53:22 -0800
Subject: [PATCH] Avoid a couple explicit loops

---
 Alc/panning.cpp           | 37 ++++++++++++++++++-------------------
 OpenAL32/Include/alMain.h | 13 +++++--------
 2 files changed, 23 insertions(+), 27 deletions(-)

diff --git a/Alc/panning.cpp b/Alc/panning.cpp
index a67234ec..7b5a6674 100644
--- a/Alc/panning.cpp
+++ b/Alc/panning.cpp
@@ -219,32 +219,31 @@ static inline const char *GetLabelFromChannel(enum Channel channel)
 }
 
 
-typedef struct ChannelMap {
-    enum Channel ChanName;
+struct ChannelMap {
+    Channel ChanName;
     ChannelConfig Config;
-} ChannelMap;
+};
 
-static void SetChannelMap(const enum Channel devchans[MAX_OUTPUT_CHANNELS],
+static void SetChannelMap(const Channel (&devchans)[MAX_OUTPUT_CHANNELS],
                           ChannelConfig *ambicoeffs, const ChannelMap *chanmap,
                           ALsizei count, ALsizei *outcount)
 {
-    ALsizei maxchans = 0;
-    ALsizei i, j;
-
-    for(i = 0;i < count;i++)
-    {
-        ALint idx = GetChannelIndex(devchans, chanmap[i].ChanName);
-        if(idx < 0)
+    ALsizei maxchans{0};
+    std::for_each(chanmap, chanmap+count,
+        [&maxchans,&devchans,ambicoeffs](const ChannelMap &channel) -> void
         {
-            ERR("Failed to find %s channel in device\n",
-                GetLabelFromChannel(chanmap[i].ChanName));
-            continue;
-        }
+            ALint idx = GetChannelIndex(devchans, channel.ChanName);
+            if(idx < 0)
+            {
+                ERR("Failed to find %s channel in device\n",
+                    GetLabelFromChannel(channel.ChanName));
+                return;
+            }
 
-        maxchans = maxi(maxchans, idx+1);
-        for(j = 0;j < MAX_AMBI_COEFFS;j++)
-            ambicoeffs[idx][j] = chanmap[i].Config[j];
-    }
+            maxchans = maxi(maxchans, idx+1);
+            std::copy_n(channel.Config, MAX_AMBI_COEFFS, ambicoeffs[idx]);
+        }
+    );
     *outcount = mini(maxchans, MAX_OUTPUT_CHANNELS);
 }
 
diff --git a/OpenAL32/Include/alMain.h b/OpenAL32/Include/alMain.h
index efec58a0..1a2f7d8d 100644
--- a/OpenAL32/Include/alMain.h
+++ b/OpenAL32/Include/alMain.h
@@ -20,6 +20,7 @@
 #include <vector>
 #include <string>
 #include <chrono>
+#include <algorithm>
 
 #include "AL/al.h"
 #include "AL/alc.h"
@@ -822,15 +823,11 @@ void SetDefaultWFXChannelOrder(ALCdevice *device);
 const ALCchar *DevFmtTypeString(enum DevFmtType type);
 const ALCchar *DevFmtChannelsString(enum DevFmtChannels chans);
 
-inline ALint GetChannelIndex(const enum Channel names[MAX_OUTPUT_CHANNELS], enum Channel chan)
+inline ALint GetChannelIndex(const enum Channel (&names)[MAX_OUTPUT_CHANNELS], enum Channel chan)
 {
-    ALint i;
-    for(i = 0;i < MAX_OUTPUT_CHANNELS;i++)
-    {
-        if(names[i] == chan)
-            return i;
-    }
-    return -1;
+    auto iter = std::find(std::begin(names), std::end(names), chan);
+    if(iter == std::end(names)) return -1;
+    return std::distance(names, iter);
 }
 /**
  * GetChannelIdxByName