1.1: simplify invert

zvezdochiot · zvezdochiot · commit bfa783a6dadc · 2019-12-13T23:24:56.000+03:00
diff --git a/hammingdec.c b/hammingdec.c
@@ -31,16 +31,19 @@ void kontrolbit(int *kod, int lengh)
 
 void invert(int *byte)
 {
-    int tmp[8], g = 0;
-    for(int i = 7; i > -1; i--)
-        tmp[g++] = byte[i];
-    for(int i = 0; i < 8; i++)
-        byte[i] = tmp[i];
+    int i, t;
+    for(i = 0; i < 4; i++)
+    {
+        t = byte[i];
+        byte[i] = byte[7 - i];
+        byte[7 - i] = t;
+    }
 }
 
 void tobit(int x, int *byte)
 {
-    for(int i = 0; i < 8; i++)
+    int i;
+    for(i = 0; i < 8; i++)
     {
         byte[i] = x%2;
         x >>= 1;
@@ -50,8 +53,8 @@ void tobit(int x, int *byte)
 
 int todec(int *byte)
 {
-    int x = 0, st = 7;
-    for(int i = 0; i < 8; i++)
+    int i, x = 0, st = 7;
+    for(i = 0; i < 8; i++)
     {
         x += (byte[i]<<st);
         st--;
diff --git a/hammingenc.c b/hammingenc.c
@@ -27,16 +27,19 @@ void kontrolbit(int *kod, int lengh)
 
 void invert(int *byte)
 {
-    int tmp[8], g = 0;
-    for(int i = 7; i > -1; i--)
-        tmp[g++] = byte[i];
-    for(int i = 0; i < 8; i++)
-        byte[i] = tmp[i];
+    int i, t;
+    for(i = 0; i < 4; i++)
+    {
+        t = byte[i];
+        byte[i] = byte[7 - i];
+        byte[7 - i] = t;
+    }
 }
 
 void tobit(int x, int *byte)
 {
-    for(int i = 0; i < 8; i++)
+    int i;
+    for(i = 0; i < 8; i++)
     {
         byte[i] = x%2;
         x >>= 1;
@@ -46,8 +49,8 @@ void tobit(int x, int *byte)
 
 int todec(int *byte)
 {
-    int x = 0, st = 7;
-    for(int i = 0; i < 8; i++)
+    int i, x = 0, st = 7;
+    for(i = 0; i < 8; i++)
     {
         x += (byte[i]<<st);
         st--;

Original file line number	Diff line number	Diff line change
`@@ -31,16 +31,19 @@ void kontrolbit(int *kod, int lengh)`
`31`	`31`
`32`	`32`	`void invert(int *byte)`
`33`	`33`	`{`
`34`		`- int tmp[8], g = 0;`
`35`		`- for(int i = 7; i > -1; i--)`
`36`		`- tmp[g++] = byte[i];`
`37`		`- for(int i = 0; i < 8; i++)`
`38`		`- byte[i] = tmp[i];`
	`34`	`+ int i, t;`
	`35`	`+ for(i = 0; i < 4; i++)`
	`36`	`+ {`
	`37`	`+ t = byte[i];`
	`38`	`+ byte[i] = byte[7 - i];`
	`39`	`+ byte[7 - i] = t;`
	`40`	`+ }`
`39`	`41`	`}`
`40`	`42`
`41`	`43`	`void tobit(int x, int *byte)`
`42`	`44`	`{`
`43`		`- for(int i = 0; i < 8; i++)`
	`45`	`+ int i;`
	`46`	`+ for(i = 0; i < 8; i++)`
`44`	`47`	`{`
`45`	`48`	`byte[i] = x%2;`
`46`	`49`	`x >>= 1;`
`@@ -50,8 +53,8 @@ void tobit(int x, int *byte)`
`50`	`53`
`51`	`54`	`int todec(int *byte)`
`52`	`55`	`{`
`53`		`- int x = 0, st = 7;`
`54`		`- for(int i = 0; i < 8; i++)`
	`56`	`+ int i, x = 0, st = 7;`
	`57`	`+ for(i = 0; i < 8; i++)`
`55`	`58`	`{`
`56`	`59`	`x += (byte[i]<<st);`
`57`	`60`	`st--;`
Original file line number	Diff line number	Diff line change
`@@ -27,16 +27,19 @@ void kontrolbit(int *kod, int lengh)`
`27`	`27`
`28`	`28`	`void invert(int *byte)`
`29`	`29`	`{`
`30`		`- int tmp[8], g = 0;`
`31`		`- for(int i = 7; i > -1; i--)`
`32`		`- tmp[g++] = byte[i];`
`33`		`- for(int i = 0; i < 8; i++)`
`34`		`- byte[i] = tmp[i];`
	`30`	`+ int i, t;`
	`31`	`+ for(i = 0; i < 4; i++)`
	`32`	`+ {`
	`33`	`+ t = byte[i];`
	`34`	`+ byte[i] = byte[7 - i];`
	`35`	`+ byte[7 - i] = t;`
	`36`	`+ }`
`35`	`37`	`}`
`36`	`38`
`37`	`39`	`void tobit(int x, int *byte)`
`38`	`40`	`{`
`39`		`- for(int i = 0; i < 8; i++)`
	`41`	`+ int i;`
	`42`	`+ for(i = 0; i < 8; i++)`
`40`	`43`	`{`
`41`	`44`	`byte[i] = x%2;`
`42`	`45`	`x >>= 1;`
`@@ -46,8 +49,8 @@ void tobit(int x, int *byte)`
`46`	`49`
`47`	`50`	`int todec(int *byte)`
`48`	`51`	`{`
`49`		`- int x = 0, st = 7;`
`50`		`- for(int i = 0; i < 8; i++)`
	`52`	`+ int i, x = 0, st = 7;`
	`53`	`+ for(i = 0; i < 8; i++)`
`51`	`54`	`{`
`52`	`55`	`x += (byte[i]<<st);`
`53`	`56`	`st--;`