X-Git-Url: https://pd.if.org/git/?p=pd_readline;a=blobdiff_plain;f=pdmenu5.c;fp=pdmenu5.c;h=9c8721f04dc2cf57725fcd7d96d7f014d0bbe6ef;hp=0000000000000000000000000000000000000000;hb=dba2080a407b920ad54432c484e0044b92cd34c7;hpb=15155262dff7689ef3601df89e70d42ec3c127ca

diff --git a/pdmenu5.c b/pdmenu5.c
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+
+
+/*  pd_readline.c                                           */  
+/*  Status (as at 26th Aug 2012) : useful progress.         */ 
+/*  Keystroke sequences (along with the special flags       */ 
+/*  like Esc, Ctrl, Alt etc are now stored in a buffer      */ 
+/*  ( an array of structs ).                                */    
+/*  It will still be some time before this is a REAL        */ 
+/*  readline, but we are "on the way"......                 */     
+/*  This code is released to the public domain.             */ 
+/*  "Share and enjoy...."  ;)                               */  
+
+
+#include <string.h>   
+#include <stdio.h> 
+
+
+/*  Helper function, to let us see if a .history file */ 
+/*  exists in the current directory.  */ 
+int fexists(char *fname)
+{  
+
+   FILE *fptr ;  	
+	
+   fptr = fopen(fname, "r") ;  
+   
+   if ( !fptr )  return -1 ;  /* File does not exist in dir. */ 	
+	 
+   fclose(fptr);  
+   return 0;    /* File DOES exist in dir.  */  	
+
+} 
+
+
+ /* Struct to store key sequences */ 
+typedef struct { 
+	   int fnkey; 
+	   int ctrl; 
+	   int alt ; 
+       int shf ; 
+       int esc ; 
+       int lbr ;  /* For left-bracket ([) of escape sequences */ 
+       int key; 
+   } keyseq ;         
+
+
+
+
+
+int main(void)
+{
+	
+  printf("Public Domain Readline \n");              
+  printf("NOTE! - at the moment, we are using \n");  
+  printf("NON-echoing reads, storing the keystrokes \n");  
+  printf("in a buffer \n");   
+    
+  
+  /* Buffer - an array of keyseq structs.                     */  
+  /* Note - now that we store the keystrokes in here,         */ 
+  /* we can look at the various flags and decide whether to   */ 
+  /* "echo" the key (as normal) or suppress it (as with an    */ 
+  /* arrow key).                                              */    
+  keyseq buffer[80] ;   
+  
+  /* Buffer "pointer"  */ 
+  int bufpnt = 0; 
+  
+  
+  /* Test for existence of history file. */  
+  int exists;  
+  exists = fexists(".history"); 
+  printf("Result: %d \n", exists);  
+  
+  while(1) 
+    {  
+                   
+      int key = getchar(); 
+       
+      /* Printable chars. */  
+      if ( (key >= 32)  && (key <= 126) ) 
+      { 
+		putchar(key);    		
+        buffer[bufpnt].key = key;  
+        bufpnt += 1; 
+      }  
+                                                                       
+      /* Up arrow is 27, 91, 65.    ( ESC [ A )   */   
+      /* Down arrow is 27, 91, 66.  ( ESC [ B )   */ 
+      /* Right arrow is 27, 91, 67. ( ESC [ C )   */ 
+      /* Left arrow is 27, 91, 68.  ( ESC [ D )   */    
+      /* Function keys.     */ 
+      /* F2 is 27, 79, 81.  */  
+      /* F3 is 27, 79, 82.  */  
+      /* F4 is 27, 79, 83.  */  
+           
+                
+      else if(key == 27)        
+          {  			  
+			  buffer[bufpnt].esc = 1; 			 
+			  key = getchar(); 
+              if(key == 91)               
+              buffer[bufpnt].lbr = 1;                
+              key = getchar(); 
+              if( (key >= 65) && (key <= 68) )  
+               { 				 
+				 buffer[bufpnt].key = key;                  
+               }				  
+            bufpnt += 1; 	    
+          } 
+              
+                                          
+                                                 
+    /* The Enter key exits. Enter is 10 decimal */	  
+        else if(key == 10)  
+		{ 
+			 int j ; 
+		   /* Print the array of structs. */ 
+		     for (j=0; j<10; j++) 	
+		     { 
+			    printf("Fnkey: %d ", buffer[j].fnkey  ) ; 
+			    printf("Ctrl:  %d ", buffer[j].ctrl   ) ;   
+			    printf("Alt:   %d ", buffer[j].alt    ) ; 
+			    printf("Shf:   %d ", buffer[j].shf    ) ; 
+			    printf("Esc:   %d ", buffer[j].esc    ) ; 
+			    printf("Lbr:   %d ", buffer[j].lbr    ) ;  
+	            printf("Key:   %d \n", buffer[j].key  ) ; 
+	         } 		  	
+					  
+             break;           
+         }  /* Key = Enter */   
+    }                
+                                      
+	return 0;
+}  
+
+
+
+