More work

[pd_readline] / funcs.c

diff --git a/funcs.c b/funcs.c
index 8ac14c685c0d129e797959084f007ad2ee7a3d14..3623220228d841bc52735d64f52f04e18f665323 100644 (file)
--- a/funcs.c
+++ b/funcs.c
@@ -18,21 +18,90 @@
 /* array member of the buffer.                            */ 
 /* Also test for the top and bottom of the history file.  */     
 
+/*  Error function.  */ 
+void error(void)
+{ 
+   printf("Error \n");         
+}      
 
-/* Move up in history list. */ 
-buf up(int i) 
+
+
+/*  Display a buffer  */ 
+void show(buf b)
 { 
-  
+   printf("%s", b.array);                      
+}      
+
 
 
+/* Enter a char into a buffer and display the buffer array.  */ 
+buf set(buf b, int i)
+{ 
+  if ( (b.index < 80)  )  
+    { 
+          b.array[b.index] = i;        
+          b.index += 1 ;
+    } 
+  else
+    { 
+          memset(&b.array[0], 0, sizeof(b.array) ); 
+          b.array[0] = i;
+          b.index += 1 ;               
+    }          
+  
+  show(b); 
+  return b;    
+       
 } 
 
 
-/* Move down in history list. */ 
-buf down(int i) 
+/*  Return a line from hist.  */ 
+buf get(hist h)
 { 
+   buf b; 
+   memcpy(&b.array[0], h.array[h.curindex], 80); 
+   return b;           
+}       
 
 
+
+/* Move up in history list. */ 
+hist up(hist h) 
+{ 
+       
+  buf b;         
+       
+  if ( (h.curindex > 0) )  
+    { 
+               h.curindex -= 1; 
+               memset(&b.array[0], 0, sizeof(b.array) ); 
+               memcpy(&b.array[0], h.array[h.curindex], 80);   
+               show(b);                
+        return h;              
+    }    
+     
+  else error();  
+  
+} 
+
+
+/* Move down in history list. */ 
+hist down(hist h) 
+{ 
+       
+  buf b;         
+       
+  if ( (h.curindex < 19) )  
+    { 
+               h.curindex += 1; 
+               memset(&b.array[0], 0, sizeof(b.array) ); 
+               memcpy(&b.array[0], h.array[h.curindex], 80); 
+               show(b);    
+        return h;                      
+    }  
+    
+  else error();     
+  
 } 
 
 
@@ -103,13 +172,13 @@ int type(int i)
 
 /*  Function for special key combinations  */ 
 /*  (Ctrl, Alt, function keys.             */ 
-void spec(void)
+void spec(hist h)
 { 
        
   int j = getch();  
-   
-       if ( ( j == 65 )        )  printf("Up ");  
-  else if ( ( j == 66 )        )  printf("Down "); 
+    
+       if ( ( j == 65 )        )  up(h); 
+  else if ( ( j == 66 )        )  down(h); 
   else if ( ( j == 67 )        )  printf("Right "); 
   else if ( ( j == 68 )        )  printf("Left ");