From 5b46b348c19f4d94827a61eb26957bbab3d113f2 Mon Sep 17 00:00:00 2001
From: Jens Staal <staal1978@gmail.com>
Date: Sun, 14 Jun 2020 07:14:36 +0200
Subject: [PATCH] attempt at providing usleep() and round() for Plan9

---
 sources/fisher.c   | 10 +++++++++-
 sources/miketron.c | 10 +++++++++-
 sources/muncher.c  | 10 +++++++++-
 sources/sudoku.c   | 17 +++++++++++++++--
 4 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/sources/fisher.c b/sources/fisher.c
index f39a37b..795c30b 100644
--- a/sources/fisher.c
+++ b/sources/fisher.c
@@ -16,7 +16,15 @@
 #define HWID WID/2
 
 #ifdef Plan9
-#define usleep(x) sleep(x/1000000) 
+int usleep(long usec) {
+    int seconds = usec/1000000;
+    long nano = usec*1000 - seconds*1000000;
+    struct timespec sleepy = {0};
+    sleepy.ts_sec = second;
+    sleepy.ts_nsec = nano;
+    nanosleep(&sleepy, (struct timespec *) NULL);
+    return 0;
+}
 #endif
 
 typedef signed char byte;
diff --git a/sources/miketron.c b/sources/miketron.c
index 096ffeb..fcd9146 100644
--- a/sources/miketron.c
+++ b/sources/miketron.c
@@ -28,7 +28,15 @@ compile with -lncurses
 #ifdef Plan9
 #define len 10
 #define wid 40
-#define usleep(x) sleep(x/1000000) 
+int usleep(long usec) {
+    int seconds = usec/1000000;
+    long nano = usec*1000 - seconds*1000000;
+    struct timespec sleepy = {0};
+    sleepy.ts_sec = second;
+    sleepy.ts_nsec = nano;
+    nanosleep(&sleepy, (struct timespec *) NULL);
+    return 0;
+}
 #endif
 
 typedef signed char byte;
diff --git a/sources/muncher.c b/sources/muncher.c
index eaae2fc..2c2a35f 100644
--- a/sources/muncher.c
+++ b/sources/muncher.c
@@ -26,7 +26,15 @@ compile with -lncurses
 #ifdef Plan9
 #define len 10
 #define wid 40
-#define usleep(x) sleep(x/1000000)
+int usleep(long usec) {
+    int seconds = usec/1000000;
+    long nano = usec*1000 - seconds*1000000;
+    struct timespec sleepy = {0};
+    sleepy.ts_sec = second;
+    sleepy.ts_nsec = nano;
+    nanosleep(&sleepy, (struct timespec *) NULL);
+    return 0;
+}
 #endif
 
 typedef signed char byte;
diff --git a/sources/sudoku.c b/sources/sudoku.c
index 104d07d..b2c2196 100644
--- a/sources/sudoku.c
+++ b/sources/sudoku.c
@@ -22,6 +22,21 @@ NOTE: This program is only made for entertainment porpuses. The puzzles are gene
 #if defined Plan9
 #define size 3
 #define s 9
+/* I hope this is approximately right */
+int round(float x)
+{
+    int y=(int) x;
+    if x>0
+        if x-y >0.5
+            return (int)(x + 0.5);
+        else
+            return y;
+    if x<0
+        if x-y <-0.5
+            return int(x -0.5);
+        else
+            return y;
+}   
 #endif
 
 typedef signed char byte;
@@ -247,9 +262,7 @@ void mouseinput(int sy, int sx){
 	getmouse(&m);
 	#endif
 	if( m.y < (3+1+size+s)-sy && m.x<(2*s+1)-sx ){//it's a shame to include math.h only for round() but it was the only moral way to make gcc shut up
-#ifndef Plan9
 		py= round( (float)(size*(m.y-4-sy))/(size+1) );//these are derived from the formulas in draw() by simple algebra
-#endif
 		px=(m.x-1-sx)/2;
 	}
 	else