Me@0: /*
Me@0:  *  Copyright 2009 OpenSourceCodeStewardshipFoundation.org
Me@0:  *  Licensed under GNU General Public License version 2
Me@0:  *
Me@0:  *  Based on code posted to a discussion group on the web.  (Forgot to mark
Me@0:  *   down where got it from)
Me@0:  *
Me@0:  * Author: seanhalle@yahoo.com
Me@0:  *
Me@0:  * Created on November 14, 2009, 9:00 PM
Me@0:  */
Me@0: #include <string.h>
Me@0: #include <stdio.h>
Me@0: #include <stdlib.h>
Me@0: 
Me@0: #include "Param.h"
Me@0: 
Me@0: void         freeParamStruc( ParamStruc * param );
Me@0: void         freeHashEntry( HashEntry *entry );
Me@0: char*        strdup_m(char *o);
Me@0: HashEntry *  lookupKeyInHash( char *key, ParamBag * bag );
Me@0: unsigned int hashKey( char *s, int hashSz );
Me@0: void         nullOutParamBagHashEntries( ParamBag *bag );
Me@0: 
Me@0:  ParamBag *
Me@0: makeParamBag()
Me@0:  { ParamBag * retBag;
Me@0:    retBag = malloc( sizeof( ParamBag ) );
Me@0:    retBag->entries = malloc( HASHSIZE * sizeof( HashEntry *) );
Me@0:    retBag->bagSz = HASHSIZE;
Me@0:    nullOutParamBagHashEntries( retBag );
Me@0:    
Me@0:    return retBag;
Me@0:  }
Me@0: 
Me@0:  void
Me@0: nullOutParamBagHashEntries( ParamBag *bag )
Me@0:  { int i, bagSz;
Me@0:    bagSz = bag->bagSz;
Me@0:    HashEntry ** entries = bag->entries;
Me@0:    for( i = 0; i < bagSz; i++ )
Me@0:       entries[ i ] = NULL;
Me@0:  }
Me@0: 
Me@0:  unsigned int
Me@0: hashKey( char *s, int hashSz )
Me@0:  { unsigned int h = 0;
Me@0:    
Me@0:    for( ; *s != 0; s++ )
Me@0:       h = *s + h*31;
Me@0:    return h % hashSz;
Me@0:  }
Me@0: 
Me@0: /*Need this to be separated out, for use in both getParam and putParam
Me@0:  */
Me@0:  HashEntry *
Me@0: lookupKeyInHash( char *key, ParamBag * bag )
Me@0:  {  unsigned int
Me@0:    hashIndex = hashKey( key, bag->bagSz );
Me@0:     HashEntry*
Me@0:    hashEntry = bag->entries[ hashIndex ];
Me@0:    for( ; hashEntry != NULL; hashEntry = hashEntry->next )
Me@0:     { if( strcmp( hashEntry->key, key ) == 0 )  return hashEntry;
Me@0:     }
Me@0:    return NULL;
Me@0:  }
Me@0: 
Me@0:  ParamStruc *
Me@0: getParamFromBag( char *key, ParamBag * bag )
Me@0:  { HashEntry *entry;
Me@0:    entry = lookupKeyInHash( key, bag );
Me@0:    if( entry == NULL ) return NULL;
Me@0:    
Me@0:    return entry->param;
Me@0:  }
Me@0: 
Me@0:  int
Me@0: addParamToBag( char* key, ParamStruc *param, ParamBag *bag )
Me@0:  { unsigned int hashIdx;
Me@0:    HashEntry* hashEntry;
Me@0:    hashEntry = lookupKeyInHash( key, bag );
Me@0:    if( hashEntry == NULL )
Me@0:     { hashIdx = hashKey( key, bag->bagSz );
Me@0:       hashEntry = (HashEntry*) malloc( sizeof( HashEntry ) );
Me@0:             if( hashEntry == NULL )  return 0;
Me@0:       hashEntry->key = strdup_m( key );
Me@0:             if( hashEntry->key == NULL ) return 0;
Me@0:       hashEntry->next = (bag->entries)[hashIdx];
Me@0:       (bag->entries)[hashIdx] = hashEntry;
Me@0:     }
Me@0:    else
Me@0:     { freeParamStruc( hashEntry->param );
Me@0:     }
Me@0:    hashEntry->param = param;
Me@0:    return 1;
Me@0:  }
Me@0: 
Me@0:  char*
Me@0: strdup_m( char *o )
Me@0:  { int l = strlen(o)+1;
Me@0:    char *ns = (char*) malloc( l * sizeof(char) );
Me@0:    strcpy( ns, o );
Me@0:    return ns;
Me@0:  }
Me@0: 
Me@0: /* A pretty useless but good debugging function,
Me@0:    which simply displays the hashtable in (key.value) pairs
Me@0: */
Me@0: /*void paramBagToString( ParamBag * bag )
Me@0:  { int i;
Me@0:    HashEntry *t;
Me@0:    for( i = 0; i < bag->bagSz; i++ )
Me@0:     { t = entries[i];
Me@0:       if( t == NULL )
Me@0:          strcat_m( retStr, &"()" );
Me@0:       else
Me@0:        { strcat_m( retStr, &"(" );
Me@0:          for( ; t != NULL; t = t->next )
Me@0:           { strcat_m( retStr, &" " );
Me@0:             strcat_m( retStr, t->key );
Me@0:             strcat_m( retStr, &"." );
Me@0:             strcat_m( retStr, paramToString( t->param ) );
Me@0:             strcat_m( retStr, &" " );
Me@0:           }
Me@0:          strcat_m( retStr, &")" );
Me@0:        }
Me@0:     }
Me@0:  }
Me@0: */
Me@0: 
Me@0: 
Me@0:  void
Me@0: freeParamBag( ParamBag *bag )
Me@0:  { int i;
Me@0:    HashEntry *hashEntry, *temp, **entries;
Me@0: 
Me@0:    entries = bag->entries;
Me@0:    for( i=0; i < bag->bagSz; i++ )
Me@0:     { if( entries[i] != NULL )
Me@0:        { hashEntry = entries[i];
Me@0:          while( hashEntry != NULL )
Me@0:           {
Me@0:             temp = hashEntry->next;
Me@0:             freeHashEntry( hashEntry );
Me@0:             hashEntry = temp;
Me@0:           }
Me@0:        }
Me@0:     }
Me@0:  }
Me@0: 
Me@0:  void
Me@0: freeHashEntry( HashEntry *entry )
Me@0:  {
Me@0:    freeParamStruc( entry->param );
Me@0:    free( entry->key ); //was malloc'd above, so free it
Me@0:    free( entry );
Me@0:  }
Me@0: 
Me@0:  void
Me@0: freeParamStruc( ParamStruc * param )
Me@0:  { if( param->type == STRING_PARAM_TYPE ) free( param->strValue );
Me@0:    free( param );
Me@0:  }
Me@0: 
Me@0:  ParamStruc *
Me@0: makeParamStruc()
Me@0:  { ParamStruc *retStruc;
Me@0:    retStruc = malloc( sizeof( ParamStruc ) );
Me@0:    retStruc->floatValue = 0.0;
Me@0:    retStruc->intValue   = 0;
Me@0:    retStruc->strValue   = NULL;
Me@0:  }
Me@0: 
Me@0:  ParamStruc *
Me@0: makeParamFromStrs( char * type, char *value )
Me@0:  { ParamStruc *retParam;
Me@0:    retParam = makeParamStruc();
Me@0:    switch(*type)
Me@0:     { case 'i':
Me@0:        { retParam->type = INT_PARAM_TYPE;
Me@0:          retParam->intValue = atoi( value );
Me@0:        } break;
Me@0:       case 's':
Me@0:        { retParam->type = STRING_PARAM_TYPE;
Me@0:          retParam->strValue = malloc( strlen(value) + 1);
Me@0:          strcpy( retParam->strValue, value );
Me@0:        } break;
Me@0:       case 'f':
Me@0:        { retParam->type = FLOAT_PARAM_TYPE;
Me@0:          retParam->floatValue = atof( value );
Me@0:        } break;
Me@0:     }
Me@0:    return retParam;
Me@0:  }
Me@0: