From 57dec209f2ab7642443c3e70c609f9209bf68f6f Mon Sep 17 00:00:00 2001
From: Keating Reid <keating.reid@protonmail.com>
Date: Fri, 5 Feb 2021 10:26:38 -0500
Subject: [PATCH 1/4] Add C++ template versions of C macros

---
 api/Common.h | 106 ++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 71 insertions(+), 35 deletions(-)

diff --git a/api/Common.h b/api/Common.h
index 6e12a74c..60c6561c 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -37,20 +37,82 @@ typedef enum {
 #define SERIAL      0x0
 #define DISPLAY     0x1
 
-#ifndef constrain
-#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#ifdef __cplusplus
+} // extern "C"
 #endif
 
-#ifndef radians
-#define radians(deg) ((deg)*DEG_TO_RAD)
-#endif
+#ifdef __cplusplus
+
+  template<class T, class L> 
+  auto min(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  {
+    return (b < a) ? b : a;
+  }
+
+  template<class T, class L> 
+  auto max(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  {
+    return (a < b) ? b : a;
+  }
+
+
+  template<class T, class U, class V> 
+  auto constrain(const T& amt, const U& low, const V& high) -> decltype((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+  {
+      return (amt)<(low)?(low):((amt)>(high)?(high):(amt));
+  }
+  
+  template<class T> 
+  auto radians(const T& deg) -> decltype(deg * DEG_TO_RAD)
+  {
+      return deg * DEG_TO_RAD;
+  }
+
+  template<class T> 
+  auto degrees(const T& rad) -> decltype(rad * RAD_TO_DEG)
+  {
+      return rad * RAD_TO_DEG;
+  }
 
-#ifndef degrees
-#define degrees(rad) ((rad)*RAD_TO_DEG)
+  template<class T> 
+  auto sq(const T& x) -> decltype(x*x)
+  {
+      return x*x;
+  }
+#else
+  #ifndef constrain
+  #define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+  #endif
+  
+  #ifndef radians
+  #define radians(deg) ((deg)*DEG_TO_RAD)
+  #endif
+  
+  #ifndef degrees
+  #define degrees(rad) ((rad)*RAD_TO_DEG)
+  #endif
+  
+  #ifndef sq
+  #define sq(x) ((x)*(x))
+  #endif
+
+  #ifndef min
+  #define min(a,b) \
+     ({ __typeof__ (a) _a = (a); \
+         __typeof__ (b) _b = (b); \
+       _a < _b ? _a : _b; })
+  #endif
+
+  #ifndef max
+  #define max(a,b) \
+     ({ __typeof__ (a) _a = (a); \
+         __typeof__ (b) _b = (b); \
+       _a > _b ? _a : _b; })
+  #endif
 #endif
 
-#ifndef sq
-#define sq(x) ((x)*(x))
+#ifdef __cplusplus
+extern "C"{
 #endif
 
 typedef void (*voidFuncPtr)(void);
@@ -119,32 +181,6 @@ void loop(void);
 } // extern "C"
 #endif
 
-#ifdef __cplusplus
-  template<class T, class L> 
-  auto min(const T& a, const L& b) -> decltype((b < a) ? b : a)
-  {
-    return (b < a) ? b : a;
-  }
-
-  template<class T, class L> 
-  auto max(const T& a, const L& b) -> decltype((b < a) ? b : a)
-  {
-    return (a < b) ? b : a;
-  }
-#else
-#ifndef min
-#define min(a,b) \
-   ({ __typeof__ (a) _a = (a); \
-       __typeof__ (b) _b = (b); \
-     _a < _b ? _a : _b; })
-#endif
-#ifndef max
-#define max(a,b) \
-   ({ __typeof__ (a) _a = (a); \
-       __typeof__ (b) _b = (b); \
-     _a > _b ? _a : _b; })
-#endif
-#endif
 
 #ifdef __cplusplus
 

From be460bc8ebe15f70e8f2270e7a090bcbf3ee9857 Mon Sep 17 00:00:00 2001
From: Keating Reid <keating.reid@protonmail.com>
Date: Fri, 5 Feb 2021 10:33:49 -0500
Subject: [PATCH 2/4] make C macros evaluate arguments once; reduce unnecessary
 parentheses

---
 api/Common.h | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/api/Common.h b/api/Common.h
index 60c6561c..a29dc532 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -44,22 +44,22 @@ typedef enum {
 #ifdef __cplusplus
 
   template<class T, class L> 
-  auto min(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  auto min(const T& a, const L& b) -> decltype(b < a ? b : a)
   {
     return (b < a) ? b : a;
   }
 
   template<class T, class L> 
-  auto max(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  auto max(const T& a, const L& b) -> decltype(b < a ? b : a)
   {
     return (a < b) ? b : a;
   }
 
 
   template<class T, class U, class V> 
-  auto constrain(const T& amt, const U& low, const V& high) -> decltype((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+  auto constrain(const T& amt, const U& low, const V& high) -> decltype(amt < low ? low : (amt > high ? high : amt))
   {
-      return (amt)<(low)?(low):((amt)>(high)?(high):(amt));
+      return amt < low ? low : (amt > high ? high : amt);
   }
   
   template<class T> 
@@ -81,19 +81,29 @@ typedef enum {
   }
 #else
   #ifndef constrain
-  #define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+  #define constrain(amt,low,high) \
+     ({ __typeof__ (amt) _amt = (amt); \
+         __typeof__ (low) _low = (low); \
+         __typeof__ (high) _high = (high); \
+       _amt < _low ? _low : (_amt > _high ? _high :_amt); }
   #endif
   
   #ifndef radians
-  #define radians(deg) ((deg)*DEG_TO_RAD)
+  #define radians(deg) \
+      ({ __typeof__ (deg) _deg = deg; \
+       _deg * DEG_TO_RAD; })
   #endif
   
   #ifndef degrees
-  #define degrees(rad) ((rad)*RAD_TO_DEG)
+  #define degrees(rad) \
+      ({ __typeof__ (rad) _rad = rad; \
+       _rad * RAD_TO_DEG; })
   #endif
   
   #ifndef sq
-  #define sq(x) ((x)*(x))
+  #define sq(x) \
+      ({ __typeof__ (x) _x = x; \
+       _x * _x; })
   #endif
 
   #ifndef min

From 18f50953c4644b2c5cb90f20cf9f7427ece02647 Mon Sep 17 00:00:00 2001
From: Keating Reid <keating.reid@protonmail.com>
Date: Wed, 17 Feb 2021 14:45:21 -0500
Subject: [PATCH 3/4] minimize diff; fix missing paren

---
 api/Common.h | 96 +++++++++++++++++++++++++---------------------------
 1 file changed, 46 insertions(+), 50 deletions(-)

diff --git a/api/Common.h b/api/Common.h
index a29dc532..78170a27 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -37,44 +37,29 @@ typedef enum {
 #define SERIAL      0x0
 #define DISPLAY     0x1
 
-#ifdef __cplusplus
-} // extern "C"
-#endif
 
 #ifdef __cplusplus
+} // extern "C"
 
-  template<class T, class L> 
-  auto min(const T& a, const L& b) -> decltype(b < a ? b : a)
-  {
-    return (b < a) ? b : a;
-  }
-
-  template<class T, class L> 
-  auto max(const T& a, const L& b) -> decltype(b < a ? b : a)
-  {
-    return (a < b) ? b : a;
-  }
-
-
-  template<class T, class U, class V> 
+  template<class T, class U, class V>
   auto constrain(const T& amt, const U& low, const V& high) -> decltype(amt < low ? low : (amt > high ? high : amt))
   {
       return amt < low ? low : (amt > high ? high : amt);
   }
-  
-  template<class T> 
+
+  template<class T>
   auto radians(const T& deg) -> decltype(deg * DEG_TO_RAD)
   {
       return deg * DEG_TO_RAD;
   }
 
-  template<class T> 
+  template<class T>
   auto degrees(const T& rad) -> decltype(rad * RAD_TO_DEG)
   {
       return rad * RAD_TO_DEG;
   }
 
-  template<class T> 
+  template<class T>
   auto sq(const T& x) -> decltype(x*x)
   {
       return x*x;
@@ -82,47 +67,33 @@ typedef enum {
 #else
   #ifndef constrain
   #define constrain(amt,low,high) \
-     ({ __typeof__ (amt) _amt = (amt); \
-         __typeof__ (low) _low = (low); \
-         __typeof__ (high) _high = (high); \
-       _amt < _low ? _low : (_amt > _high ? _high :_amt); }
+   ({ __typeof__ (amt) _amt = (amt); \
+       __typeof__ (low) _low = (low); \
+       __typeof__ (high) _high = (high); \
+     _amt < _low ? _low : (_amt > _high ? _high :_amt); })
   #endif
-  
+
   #ifndef radians
   #define radians(deg) \
-      ({ __typeof__ (deg) _deg = deg; \
-       _deg * DEG_TO_RAD; })
+    ({ __typeof__ (deg) _deg = deg; \
+     _deg * DEG_TO_RAD; })
   #endif
-  
+
   #ifndef degrees
   #define degrees(rad) \
-      ({ __typeof__ (rad) _rad = rad; \
-       _rad * RAD_TO_DEG; })
+    ({ __typeof__ (rad) _rad = rad; \
+     _rad * RAD_TO_DEG; })
   #endif
-  
+
   #ifndef sq
   #define sq(x) \
-      ({ __typeof__ (x) _x = x; \
-       _x * _x; })
-  #endif
-
-  #ifndef min
-  #define min(a,b) \
-     ({ __typeof__ (a) _a = (a); \
-         __typeof__ (b) _b = (b); \
-       _a < _b ? _a : _b; })
-  #endif
-
-  #ifndef max
-  #define max(a,b) \
-     ({ __typeof__ (a) _a = (a); \
-         __typeof__ (b) _b = (b); \
-       _a > _b ? _a : _b; })
+    ({ __typeof__ (x) _x = x; \
+     _x * _x; })
   #endif
 #endif
 
 #ifdef __cplusplus
-extern "C"{
+extern "C" {
 #endif
 
 typedef void (*voidFuncPtr)(void);
@@ -189,8 +160,32 @@ void loop(void);
 
 #ifdef __cplusplus
 } // extern "C"
-#endif
 
+  template<class T, class L>
+  auto min(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  {
+    return (b < a) ? b : a;
+  }
+
+  template<class T, class L>
+  auto max(const T& a, const L& b) -> decltype((b < a) ? b : a)
+  {
+    return (a < b) ? b : a;
+  }
+#else
+  #ifndef min
+  #define min(a,b) \
+     ({ __typeof__ (a) _a = (a); \
+         __typeof__ (b) _b = (b); \
+       _a < _b ? _a : _b; })
+  #endif
+  #ifndef max
+  #define max(a,b) \
+     ({ __typeof__ (a) _a = (a); \
+         __typeof__ (b) _b = (b); \
+       _a > _b ? _a : _b; })
+  #endif
+#endif
 
 #ifdef __cplusplus
 
@@ -213,3 +208,4 @@ void randomSeed(unsigned long);
 long map(long, long, long, long, long);
 
 #endif // __cplusplus
+

From 585f67a7147712a1c8eb577ec7faaa349515d90e Mon Sep 17 00:00:00 2001
From: Keating Reid <keating.reid@protonmail.com>
Date: Wed, 17 Feb 2021 14:51:58 -0500
Subject: [PATCH 4/4] remove trailing newline

---
 api/Common.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/api/Common.h b/api/Common.h
index 78170a27..bacae0b0 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -208,4 +208,3 @@ void randomSeed(unsigned long);
 long map(long, long, long, long, long);
 
 #endif // __cplusplus
-

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