OOPSE-1.0/libBASS/BASS_parse.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "BASSyacc.h"
#include "BASS_parse.h"
#include "simError.h"
#ifdef IS_MPI
#define __is_lex__
#include "mpiBASS.h"
#endif

#define HASH_SIZE 211 // the size of the hash table
#define SHIFT 4 // the bit shift for the hash index 


//*** Global functions, variables, and structures ************

unsigned short is_initialized = 0; // tells whether to init the linked list

// reserved word elements for the hash table
struct res_element{
  char word[100];        //the reserved word
  int token;             //the token to return;
  struct res_element* next;
};

struct res_element** reserved = NULL; //the table of reserved words

void initialize_res_list(void); // function to initialize the list

int hash ( char* text ); // generates the hash key

void add_res_element( char* text, int the_token ); //adds elements to the table

// the elements of the defined Hash table
struct defined_element{
  char defined[100];
  char definition[DEFINED_BUFFER_SIZE];
  struct defined_element* next;
};

struct defined_element** defined_list = NULL; // the defined hash table


//*** The Functions *******************************************


/*
  function to initialize the list of reserved words into memory.
*/

void initialize_res_list(){
  
  register unsigned short i; // loop counter

  reserved = ( struct res_element ** ) 
    calloc( HASH_SIZE, sizeof( struct hash__element* ) );

  for( i=0; i < HASH_SIZE; i++ ){
    
    reserved[i] = NULL;
  }

  // add the reserved words

  add_res_element( "molecule", MOLECULE );
  add_res_element( "atom", ATOM );
  add_res_element( "bond", BOND );
  add_res_element( "bend", BEND );
  add_res_element( "torsion", TORSION );
  add_res_element( "position", POSITION );
  add_res_element( "members", MEMBERS );
  add_res_element( "constraint", CONSTRAINT );
  add_res_element( "component", COMPONENT );
  add_res_element( "zConstraint", ZCONSTRAINT );
  add_res_element( "orientation", ORIENTATION );
  add_res_element( "rigidBody", RIGIDBODY );
  add_res_element( "cutoffGroup", CUTOFFGROUP );
  
  is_initialized = 1; // set the initialization boolean to true
}


/*
   checks for reserved words.
   If a reserved word is found, returns the token,
   else returns 0.
*/

int res_word( char* text ){
  
  int matched = 0;
  int key; // the hash key
  struct res_element* current_ptr; // points to the current hash element
  struct defined_element* def_ptr; // points to the current define element

  if( !is_initialized ){ // initialize the list if not already done

    initialize_res_list();
  }
  
  // get the hash key

  key = hash( text );
  current_ptr = reserved[key];

  // walk through possible mutiple entries

  while( current_ptr != NULL ){
    
    matched = !strcmp( text, current_ptr->word );
    if( matched ) return current_ptr->token; // search successful

    current_ptr = current_ptr->next;
  }

  // if no keywords turn up, check the word against the list of defines
  
  if( defined_list != NULL ){
    def_ptr = defined_list[key];
    
    while( def_ptr != NULL ){
      
      matched = !strcmp( text, def_ptr->defined );
      if( matched ) return DEFINED;
      
      def_ptr = def_ptr->next;
    }
  }

  return 0; //search failed
}

/*
 * This is used to test whether a given word is defined
 * returns 1 if true, 0 if False.
 */

int is_defined( char* text ){

  int matched = 0;
  int key;
  struct defined_element* def_ptr; // points to the current define element
  
  key = hash( text );

  if( defined_list != NULL ){
        def_ptr = defined_list[key];
    
    while( def_ptr != NULL ){
      
      matched = !strcmp( text, def_ptr->defined );
      if( matched ) return 1; // search succesful
      
      def_ptr = def_ptr->next;
    }
  }

  return 0; //search failed
}

/*
 * The next bit returns the text to substitute for any given define.
 */

char* get_definition( char* defined ){
  int key;
  int matched = 0;
  struct defined_element* def_ptr;
  
  if( defined_list != NULL ){

    key = hash( defined );
    def_ptr = defined_list[key];
    
    while( def_ptr != NULL ){
      
      matched = !strcmp( defined, def_ptr->defined );
      if( matched ) return def_ptr->definition;
      
      def_ptr = def_ptr->next;
    }
  }
  
  // search failed, therefore there is an error

  sprintf( painCave.errMsg, "%s was not found in the defined list\n", 
           defined );
  painCave.isFatal = 1;
  simError();
  return NULL;
}
 
/*
 * Add a define statement to the hash table
 */

void insert_define( char* defined, char* definition ){
  
  int i, key;
  struct defined_element* element;

  if( defined_list == NULL ){
    
    defined_list = ( struct defined_element** )
      calloc( HASH_SIZE, sizeof( struct defined_element* ) );
    
    for( i=0; i<HASH_SIZE; i++ ){

      defined_list[i] = NULL;
    }
  }

  key = hash( defined );
  element = (struct defined_element* )
    malloc( sizeof( struct defined_element ) );

  // fill the element
  
  strcpy( element->defined, defined );
  strcpy( element->definition, definition );

  // add the element to the table

  element->next = defined_list[key];
  defined_list[key] = element;
}

/*
 * adds an element to the hash table
 */

void add_res_element( char* text, int the_token ){
  
  int key; // the calculated hash key;
  struct res_element* element; // the element being added

  key = hash( text );
  element = (struct res_element *) malloc( sizeof( struct res_element ) );
  
  // fill the element

  strcpy( element->word, text );
  element->token = the_token;

  // add the element to the table

  element->next = reserved[key];
  reserved[key] = element;
}

/*
  generartes the hash key from the given word.
*/

int hash ( char* text ){

  register unsigned short int i = 0; // loop counter
  int key = 0; // the hash key

  while( text[i] != '\0' ){

    key = ( ( key << SHIFT ) + text[i] ) % HASH_SIZE;
    
    i++;
  }
  
  if( key < 0 ){

    // if the key is less than zero, we've had an overflow error

    sprintf( painCave.errMsg,
             "Meta-data parse error: There has been an overflow error in the hash key.");
    painCave.isFatal =1;
    simError();
  }
  
  return key;
}

/*
  function to clean up the memory after we are finished with the lists
*/

void kill_lists( ){
  
  struct res_element* current_res_ptr;
  struct res_element* temp_res_ptr;

  struct defined_element* current_def_ptr;
  struct defined_element* temp_def_ptr;

  register unsigned short int i;

  if( reserved != NULL ){

    for( i=0; i < HASH_SIZE; i++){
      
      current_res_ptr = reserved[i];
      
      while( current_res_ptr != NULL ){
        
        temp_res_ptr = current_res_ptr->next;
        free( current_res_ptr );
        current_res_ptr = temp_res_ptr;
      }
    }    

    free( reserved );
  }

  if( defined_list != NULL ){

    for( i=0; i < HASH_SIZE; i++){
      
      current_def_ptr = defined_list[i];
      
      while( current_def_ptr != NULL ){
        
        temp_def_ptr = current_def_ptr->next;
        free( current_def_ptr );
        current_def_ptr = temp_def_ptr;
      }
    }    

    free( defined_list );
  }

  reserved = NULL;
  defined_list = NULL;

  is_initialized = 0; // initialization is now false
}
Revision:	1419
Committed:	Tue Jul 27 18:14:16 2004 UTC (20 years, 9 months ago) by gezelter
Content type:	text/plain
File size:	7218 byte(s)
Log Message:	BASS eradication project (part 3)
#	Content
1	#include <stdio.h>
2	#include <stdlib.h>
3	#include <string.h>
4
5	#include "BASSyacc.h"
6	#include "BASS_parse.h"
7	#include "simError.h"
8	#ifdef IS_MPI
9	#define __is_lex__
10	#include "mpiBASS.h"
11	#endif
12
13	#define HASH_SIZE 211 // the size of the hash table
14	#define SHIFT 4 // the bit shift for the hash index
15
16
17	//* Global functions, variables, and structures **********
18
19	unsigned short is_initialized = 0; // tells whether to init the linked list
20
21	// reserved word elements for the hash table
22	struct res_element{
23	char word[100]; //the reserved word
24	int token; //the token to return;
25	struct res_element* next;
26	};
27
28	struct res_element** reserved = NULL; //the table of reserved words
29
30	void initialize_res_list(void); // function to initialize the list
31
32	int hash ( char* text ); // generates the hash key
33
34	void add_res_element( char* text, int the_token ); //adds elements to the table
35
36	// the elements of the defined Hash table
37	struct defined_element{
38	char defined[100];
39	char definition[DEFINED_BUFFER_SIZE];
40	struct defined_element* next;
41	};
42
43	struct defined_element** defined_list = NULL; // the defined hash table
44
45
46
47	//* The Functions *****************************************
48
49
50	/*
51	function to initialize the list of reserved words into memory.
52	*/
53
54	void initialize_res_list(){
55
56	register unsigned short i; // loop counter
57
58	reserved = ( struct res_element ** )
59	calloc( HASH_SIZE, sizeof( struct hash__element* ) );
60
61	for( i=0; i < HASH_SIZE; i++ ){
62
63	reserved[i] = NULL;
64	}
65
66	// add the reserved words
67
68	add_res_element( "molecule", MOLECULE );
69	add_res_element( "atom", ATOM );
70	add_res_element( "bond", BOND );
71	add_res_element( "bend", BEND );
72	add_res_element( "torsion", TORSION );
73	add_res_element( "position", POSITION );
74	add_res_element( "members", MEMBERS );
75	add_res_element( "constraint", CONSTRAINT );
76	add_res_element( "component", COMPONENT );
77	add_res_element( "zConstraint", ZCONSTRAINT );
78	add_res_element( "orientation", ORIENTATION );
79	add_res_element( "rigidBody", RIGIDBODY );
80	add_res_element( "cutoffGroup", CUTOFFGROUP );
81
82	is_initialized = 1; // set the initialization boolean to true
83	}
84
85
86	/*
87	checks for reserved words.
88	If a reserved word is found, returns the token,
89	else returns 0.
90	*/
91
92	int res_word( char* text ){
93
94	int matched = 0;
95	int key; // the hash key
96	struct res_element* current_ptr; // points to the current hash element
97	struct defined_element* def_ptr; // points to the current define element
98
99	if( !is_initialized ){ // initialize the list if not already done
100
101	initialize_res_list();
102	}
103
104	// get the hash key
105
106	key = hash( text );
107	current_ptr = reserved[key];
108
109	// walk through possible mutiple entries
110
111	while( current_ptr != NULL ){
112
113	matched = !strcmp( text, current_ptr->word );
114	if( matched ) return current_ptr->token; // search successful
115
116	current_ptr = current_ptr->next;
117	}
118
119	// if no keywords turn up, check the word against the list of defines
120
121	if( defined_list != NULL ){
122	def_ptr = defined_list[key];
123
124	while( def_ptr != NULL ){
125
126	matched = !strcmp( text, def_ptr->defined );
127	if( matched ) return DEFINED;
128
129	def_ptr = def_ptr->next;
130	}
131	}
132
133	return 0; //search failed
134	}
135
136	/*
137	* This is used to test whether a given word is defined
138	* returns 1 if true, 0 if False.
139	*/
140
141	int is_defined( char* text ){
142
143	int matched = 0;
144	int key;
145	struct defined_element* def_ptr; // points to the current define element
146
147	key = hash( text );
148
149	if( defined_list != NULL ){
150	def_ptr = defined_list[key];
151
152	while( def_ptr != NULL ){
153
154	matched = !strcmp( text, def_ptr->defined );
155	if( matched ) return 1; // search succesful
156
157	def_ptr = def_ptr->next;
158	}
159	}
160
161	return 0; //search failed
162	}
163
164	/*
165	* The next bit returns the text to substitute for any given define.
166	*/
167
168	char* get_definition( char* defined ){
169	int key;
170	int matched = 0;
171	struct defined_element* def_ptr;
172
173	if( defined_list != NULL ){
174
175	key = hash( defined );
176	def_ptr = defined_list[key];
177
178	while( def_ptr != NULL ){
179
180	matched = !strcmp( defined, def_ptr->defined );
181	if( matched ) return def_ptr->definition;
182
183	def_ptr = def_ptr->next;
184	}
185	}
186
187	// search failed, therefore there is an error
188
189	sprintf( painCave.errMsg, "%s was not found in the defined list\n",
190	defined );
191	painCave.isFatal = 1;
192	simError();
193	return NULL;
194	}
195
196	/*
197	* Add a define statement to the hash table
198	*/
199
200	void insert_define( char* defined, char* definition ){
201
202	int i, key;
203	struct defined_element* element;
204
205	if( defined_list == NULL ){
206
207	defined_list = ( struct defined_element** )
208	calloc( HASH_SIZE, sizeof( struct defined_element* ) );
209
210	for( i=0; i<HASH_SIZE; i++ ){
211
212	defined_list[i] = NULL;
213	}
214	}
215
216	key = hash( defined );
217	element = (struct defined_element* )
218	malloc( sizeof( struct defined_element ) );
219
220	// fill the element
221
222	strcpy( element->defined, defined );
223	strcpy( element->definition, definition );
224
225	// add the element to the table
226
227	element->next = defined_list[key];
228	defined_list[key] = element;
229	}
230
231	/*
232	* adds an element to the hash table
233	*/
234
235	void add_res_element( char* text, int the_token ){
236
237	int key; // the calculated hash key;
238	struct res_element* element; // the element being added
239
240	key = hash( text );
241	element = (struct res_element *) malloc( sizeof( struct res_element ) );
242
243	// fill the element
244
245	strcpy( element->word, text );
246	element->token = the_token;
247
248	// add the element to the table
249
250	element->next = reserved[key];
251	reserved[key] = element;
252	}
253
254	/*
255	generartes the hash key from the given word.
256	*/
257
258	int hash ( char* text ){
259
260	register unsigned short int i = 0; // loop counter
261	int key = 0; // the hash key
262
263	while( text[i] != '\0' ){
264
265	key = ( ( key << SHIFT ) + text[i] ) % HASH_SIZE;
266
267	i++;
268	}
269
270	if( key < 0 ){
271
272	// if the key is less than zero, we've had an overflow error
273
274	sprintf( painCave.errMsg,
275	"Meta-data parse error: There has been an overflow error in the hash key.");
276	painCave.isFatal =1;
277	simError();
278	}
279
280	return key;
281	}
282
283	/*
284	function to clean up the memory after we are finished with the lists
285	*/
286
287	void kill_lists( ){
288
289	struct res_element* current_res_ptr;
290	struct res_element* temp_res_ptr;
291
292	struct defined_element* current_def_ptr;
293	struct defined_element* temp_def_ptr;
294
295	register unsigned short int i;
296
297	if( reserved != NULL ){
298
299	for( i=0; i < HASH_SIZE; i++){
300
301	current_res_ptr = reserved[i];
302
303	while( current_res_ptr != NULL ){
304
305	temp_res_ptr = current_res_ptr->next;
306	free( current_res_ptr );
307	current_res_ptr = temp_res_ptr;
308	}
309	}
310
311	free( reserved );
312	}
313
314	if( defined_list != NULL ){
315
316	for( i=0; i < HASH_SIZE; i++){
317
318	current_def_ptr = defined_list[i];
319
320	while( current_def_ptr != NULL ){
321
322	temp_def_ptr = current_def_ptr->next;
323	free( current_def_ptr );
324	current_def_ptr = temp_def_ptr;
325	}
326	}
327
328	free( defined_list );
329	}
330
331	reserved = NULL;
332	defined_list = NULL;
333
334	is_initialized = 0; // initialization is now false
335	}