src/io/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:	2
Committed:	Fri Sep 24 04:16:43 2004 UTC (20 years, 7 months ago) by gezelter
Content type:	text/plain
File size:	7213 byte(s)
Log Message:	Import of OOPSE v. 2.0
#	User	Rev	Content
1	gezelter	2	#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
123			def_ptr = defined_list[key];
124
125			while( def_ptr != NULL ){
126
127			matched = !strcmp( text, def_ptr->defined );
128			if( matched ) return DEFINED;
129
130			def_ptr = def_ptr->next;
131			}
132			}
133
134			return 0; //search failed
135			}
136
137			/*
138			* This is used to test whether a given word is defined
139			* returns 1 if true, 0 if False.
140			*/
141
142			int is_defined( char* text ){
143
144			int matched = 0;
145			int key;
146			struct defined_element* def_ptr; // points to the current define element
147
148			key = hash( text );
149
150			if( defined_list != NULL ){
151			def_ptr = defined_list[key];
152
153			while( def_ptr != NULL ){
154
155			matched = !strcmp( text, def_ptr->defined );
156			if( matched ) return 1; // search succesful
157
158			def_ptr = def_ptr->next;
159			}
160			}
161
162			return 0; //search failed
163			}
164
165			/*
166			* The next bit returns the text to substitute for any given define.
167			*/
168
169			char* get_definition( char* defined ){
170			int key;
171			int matched = 0;
172			struct defined_element* def_ptr;
173
174			if( defined_list != NULL ){
175
176			key = hash( defined );
177			def_ptr = defined_list[key];
178
179			while( def_ptr != NULL ){
180
181			matched = !strcmp( defined, def_ptr->defined );
182			if( matched ) return def_ptr->definition;
183
184			def_ptr = def_ptr->next;
185			}
186			}
187
188			// search failed, therefore there is an error
189
190			sprintf( painCave.errMsg, "%s was not found in the defined list\n",
191			defined );
192			painCave.isFatal = 1;
193			simError();
194			return NULL;
195			}
196
197			/*
198			* Add a define statement to the hash table
199			*/
200
201			void insert_define( char* defined, char* definition ){
202
203			int i, key;
204			struct defined_element* element;
205
206			if( defined_list == NULL ){
207
208			defined_list = ( struct defined_element** )
209			calloc( HASH_SIZE, sizeof( struct defined_element* ) );
210
211			for( i=0; i<HASH_SIZE; i++ ){
212
213			defined_list[i] = NULL;
214			}
215			}
216
217			key = hash( defined );
218			element = (struct defined_element* )
219			malloc( sizeof( struct defined_element ) );
220
221			// fill the element
222
223			strcpy( element->defined, defined );
224			strcpy( element->definition, definition );
225
226			// add the element to the table
227
228			element->next = defined_list[key];
229			defined_list[key] = element;
230			}
231
232			/*
233			* adds an element to the hash table
234			*/
235
236			void add_res_element( char* text, int the_token ){
237
238			int key; // the calculated hash key;
239			struct res_element* element; // the element being added
240
241			key = hash( text );
242			element = (struct res_element *) malloc( sizeof( struct res_element ) );
243
244			// fill the element
245
246			strcpy( element->word, text );
247			element->token = the_token;
248
249			// add the element to the table
250
251			element->next = reserved[key];
252			reserved[key] = element;
253			}
254
255			/*
256			generartes the hash key from the given word.
257			*/
258
259			int hash ( char* text ){
260
261			register unsigned short int i = 0; // loop counter
262			int key = 0; // the hash key
263
264			while( text[i] != '\0' ){
265
266			key = ( ( key << SHIFT ) + text[i] ) % HASH_SIZE;
267
268			i++;
269			}
270
271			if( key < 0 ){
272
273			// if the key is less than zero, we've had an overflow error
274
275			sprintf( painCave.errMsg,
276			"Meta-data parse error: There has been an overflow error in the hash key.");
277			painCave.isFatal =1;
278			simError();
279			}
280
281			return key;
282			}
283
284			/*
285			function to clean up the memory after we are finished with the lists
286			*/
287
288			void kill_lists( ){
289
290			struct res_element* current_res_ptr;
291			struct res_element* temp_res_ptr;
292
293			struct defined_element* current_def_ptr;
294			struct defined_element* temp_def_ptr;
295
296			register unsigned short int i;
297
298			if( reserved != NULL ){
299
300			for( i=0; i < HASH_SIZE; i++){
301
302			current_res_ptr = reserved[i];
303
304			while( current_res_ptr != NULL ){
305
306			temp_res_ptr = current_res_ptr->next;
307			free( current_res_ptr );
308			current_res_ptr = temp_res_ptr;
309			}
310			}
311
312			free( reserved );
313			}
314
315			if( defined_list != NULL ){
316
317			for( i=0; i < HASH_SIZE; i++){
318
319			current_def_ptr = defined_list[i];
320
321			while( current_def_ptr != NULL ){
322
323			temp_def_ptr = current_def_ptr->next;
324			free( current_def_ptr );
325			current_def_ptr = temp_def_ptr;
326			}
327			}
328
329			free( defined_list );
330			}
331
332			reserved = NULL;
333			defined_list = NULL;
334
335			is_initialized = 0; // initialization is now false
336			}