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   1 /* testavl.c - Test Tim Howes AVL code */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include <ac/string.h>
   9
  10 #define AVL_NONREENTRANT
  11 #include "avl.h"
  12
  13 static void ravl_print LDAP_P(( Avlnode *root, int depth ));
  14 static void myprint LDAP_P(( Avlnode *root ));
  15
  16 int
  17 main( int argc, char **argv )
  18 {
  19         Avlnode *tree = NULLAVL;
  20         char    command[ 10 ];
  21         char    name[ 80 ];
  22         char    *p;
  23
  24         printf( "> " );
  25         while ( fgets( command, sizeof( command ), stdin ) != NULL ) {
  26                 switch( *command ) {
  27                 case 'n':       /* new tree */
  28                         ( void ) avl_free( tree, (AVL_FREE) free );
  29                         tree = NULLAVL;
  30                         break;
  31                 case 'p':       /* print */
  32                         ( void ) myprint( tree );
  33                         break;
  34                 case 't':       /* traverse with first, next */
  35 #ifdef AVL_NONREENTRANT
  36                         printf( "***\n" );
  37                         for ( p = (char * ) avl_getfirst( tree );
  38                             p != NULL;
  39                                 p = (char *) avl_getnext())
  40                                 printf( "%s\n", p );
  41                         printf( "***\n" );
  42 #else
  43                         printf( "*** reentrant interface not implemented ***" );
  44 #endif
  45                         break;
  46                 case 'f':       /* find */
  47                         printf( "data? " );
  48                         if ( fgets( name, sizeof( name ), stdin ) == NULL )
  49                                 exit( 0 );
  50                         name[ strlen( name ) - 1 ] = '\0';
  51                         if ( (p = (char *) avl_find( tree, name, (AVL_CMP) strcmp ))
  52                             == NULL )
  53                                 printf( "Not found.\n\n" );
  54                         else
  55                                 printf( "%s\n\n", p );
  56                         break;
  57                 case 'i':       /* insert */
  58                         printf( "data? " );
  59                         if ( fgets( name, sizeof( name ), stdin ) == NULL )
  60                                 exit( 0 );
  61                         name[ strlen( name ) - 1 ] = '\0';
  62                         if ( avl_insert( &tree, strdup( name ), (AVL_CMP) strcmp,
  63                             avl_dup_error ) != 0 )
  64                                 printf( "\nNot inserted!\n" );
  65                         break;
  66                 case 'd':       /* delete */
  67                         printf( "data? " );
  68                         if ( fgets( name, sizeof( name ), stdin ) == NULL )
  69                                 exit( 0 );
  70                         name[ strlen( name ) - 1 ] = '\0';
  71                         if ( avl_delete( &tree, name, (AVL_CMP) strcmp ) == NULL )
  72                                 printf( "\nNot found!\n" );
  73                         break;
  74                 case 'q':       /* quit */
  75                         exit( 0 );
  76                         break;
  77                 case '\n':
  78                         break;
  79                 default:
  80                         printf("Commands: insert, delete, print, new, quit\n");
  81                 }
  82
  83                 printf( "> " );
  84         }
  85
  86         return( 0 );
  87 }
  88
  89 static void ravl_print( Avlnode *root, int depth )
  90 {
  91         int     i;
  92
  93         if ( root == 0 )
  94                 return;
  95
  96         ravl_print( root->avl_right, depth+1 );
  97
  98         for ( i = 0; i < depth; i++ )
  99                 printf( "   " );
 100         printf( "%s %d\n", (char *) root->avl_data, root->avl_bf );
 101
 102         ravl_print( root->avl_left, depth+1 );
 103 }
 104
 105 static void myprint( Avlnode *root )
 106 {
 107         printf( "********\n" );
 108
 109         if ( root == 0 )
 110                 printf( "\tNULL\n" );
 111         else
 112                 ravl_print( root, 0 );
 113
 114         printf( "********\n" );
 115 }