| |
| /* |
| * Name: createIndexNode |
| * Input: integer level |
| * Output: new index node |
| * Return: IndexNode pointer, or |
| * NULL (if allocation failed) |
| * Description: Routine creates new node using system allocation routine, |
| * malloc. Returns pointer to new node or NULL if allocation |
| * failed. The level of the new node is input and stored in |
| * new node and the list of index entries is specified to be |
| * empty. |
| * Calls: errorMessage() |
| * System: malloc() |
| * Author: M.L.Rivas |
| * |
| * Revision History: |
| * Date Name Revision |
| * ------- --------------- ------------------------------ |
| * 24May99 Matthew Rivas Created |
| * |
| * Copyright 1999, Atlantic Aerospace Electronics Corp. |
| */ |
| |
| #include <stdlib.h> /* for malloc() and NULL definitions */ |
| #include "dataManagement.h" /* for primitive type definitions */ |
| #include "errorMessage.h" /* for errorMessage() definition */ |
| #include "index.h" /* for IndexNode definition */ |
| |
| IndexNode * createIndexNode( Int level ) /* level of new node */ |
| { /* beginning of createIndexNode() */ |
| IndexNode * node; /* node to create */ |
| |
| static Char name[] = "createIndexNode"; |
| |
| node = NULL; |
| |
| /* |
| * Check for invalid node level |
| */ |
| if ( level < LEAF ) { |
| errorMessage( "invalid level specified", REPLACE ); |
| errorMessage( name, PREPEND ); |
| node = NULL; |
| } /* end of if ( level < LEAF ) */ |
| /* |
| * Create new node with specified level |
| */ |
| else { |
| /* |
| * Allocate memory for new node |
| */ |
| node = (IndexNode *)malloc( sizeof( IndexNode ) ); |
| if ( node == NULL ) { |
| errorMessage( "allocation failure", REPLACE ); |
| errorMessage( name, PREPEND ); |
| } /* end of if ( node == NULL ) */ |
| else { |
| node->level = level; |
| } /* end of else */ |
| } /* end of else */ |
| |
| /* |
| * Set entries of new node to empty list |
| */ |
| node->entries = NULL; |
| |
| return ( node ); |
| } /* end of createIndexNode */ |
