1 /* @(#) pfcompil.c 98/01/26 1.5 */
2 /***************************************************************
3 ** Compiler for PForth based on 'C'
5 ** These routines could be left out of an execute only version.
8 ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
10 ** The pForth software code is dedicated to the public domain,
11 ** and any third party may reproduce, distribute and modify
12 ** the pForth software code or any derivative works thereof
13 ** without any compensation or license. The pForth software
14 ** code is provided on an "as is" basis without any warranty
15 ** of any kind, including, without limitation, the implied
16 ** warranties of merchantability and fitness for a particular
17 ** purpose and their equivalents under the laws of any jurisdiction.
19 ****************************************************************
20 ** 941004 PLB Extracted IO calls from pforth_main.c
21 ** 950320 RDG Added underflow checking for FP stack
22 ***************************************************************/
27 #define ABORT_RETURN_CODE (10)
28 #define UINT32_MASK ((sizeof(ucell_t)-1))
30 /***************************************************************/
31 /************** Static Prototypes ******************************/
32 /***************************************************************/
34 static void ffStringColon( const ForthStringPtr FName );
35 static cell_t CheckRedefinition( const ForthStringPtr FName );
36 static void ffUnSmudge( void );
37 static cell_t FindAndCompile( const char *theWord );
38 static cell_t ffCheckDicRoom( void );
41 static void CreateDeferredC( ExecToken DefaultXT, const char *CName );
44 cell_t NotCompiled( const char *FunctionName )
48 MSG(" not compiled in this version of PForth.\n");
53 /***************************************************************
54 ** Create an entry in the Dictionary for the given ExecutionToken.
55 ** FName is name in Forth format.
57 void CreateDicEntry( ExecToken XT, const ForthStringPtr FName, ucell_t Flags )
61 cfnl = (cfNameLinks *) gCurrentDictionary->dic_HeaderPtr;
63 /* Set link to previous header, if any. */
66 WRITE_CELL_DIC( &cfnl->cfnl_PreviousName, ABS_TO_NAMEREL( gVarContext ) );
70 cfnl->cfnl_PreviousName = 0;
73 /* Put Execution token in header. */
74 WRITE_CELL_DIC( &cfnl->cfnl_ExecToken, XT );
76 /* Advance Header Dictionary Pointer */
77 gCurrentDictionary->dic_HeaderPtr += sizeof(cfNameLinks);
80 gVarContext = gCurrentDictionary->dic_HeaderPtr;
81 pfCopyMemory( (uint8_t *) gCurrentDictionary->dic_HeaderPtr, FName, (*FName)+1 );
82 gCurrentDictionary->dic_HeaderPtr += (*FName)+1;
85 *(char*)gVarContext |= (char) Flags;
87 /* Align to quad byte boundaries with zeroes. */
88 while( gCurrentDictionary->dic_HeaderPtr & UINT32_MASK )
90 *(char*)(gCurrentDictionary->dic_HeaderPtr++) = 0;
94 /***************************************************************
95 ** Convert name then create dictionary entry.
97 void CreateDicEntryC( ExecToken XT, const char *CName, ucell_t Flags )
99 ForthString FName[40];
100 CStringToForth( FName, CName, sizeof(FName) );
101 CreateDicEntry( XT, FName, Flags );
104 /***************************************************************
105 ** Convert absolute namefield address to previous absolute name
106 ** field address or NULL.
108 const ForthString *NameToPrevious( const ForthString *NFA )
111 const cfNameLinks *cfnl;
113 /* DBUG(("\nNameToPrevious: NFA = 0x%x\n", (cell_t) NFA)); */
114 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
116 RelNamePtr = READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_PreviousName));
117 /* DBUG(("\nNameToPrevious: RelNamePtr = 0x%x\n", (cell_t) RelNamePtr )); */
120 return ( (ForthString *) NAMEREL_TO_ABS( RelNamePtr ) );
127 /***************************************************************
128 ** Convert NFA to ExecToken.
130 ExecToken NameToToken( const ForthString *NFA )
132 const cfNameLinks *cfnl;
134 /* Convert absolute namefield address to absolute link field address. */
135 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
137 return READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_ExecToken));
140 /***************************************************************
141 ** Find XTs needed by compiler.
143 cell_t FindSpecialXTs( void )
145 if( ffFindC( "(QUIT)", &gQuitP_XT ) == 0) goto nofind;
146 if( ffFindC( "NUMBER?", &gNumberQ_XT ) == 0) goto nofind;
147 if( ffFindC( "ACCEPT", &gAcceptP_XT ) == 0) goto nofind;
148 DBUG(("gNumberQ_XT = 0x%x\n", (unsigned int)gNumberQ_XT ));
152 ERR("FindSpecialXTs failed!\n");
156 /***************************************************************
157 ** Build a dictionary from scratch.
160 PForthDictionary pfBuildDictionary( cell_t HeaderSize, cell_t CodeSize )
164 dic = pfCreateDictionary( HeaderSize, CodeSize );
165 if( !dic ) goto nomem;
167 pfDebugMessage("pfBuildDictionary: Start adding dictionary entries.\n");
169 gCurrentDictionary = dic;
170 gNumPrimitives = NUM_PRIMITIVES;
172 CreateDicEntryC( ID_EXIT, "EXIT", 0 );
173 pfDebugMessage("pfBuildDictionary: added EXIT\n");
174 CreateDicEntryC( ID_1MINUS, "1-", 0 );
175 pfDebugMessage("pfBuildDictionary: added 1-\n");
176 CreateDicEntryC( ID_1PLUS, "1+", 0 );
177 CreateDicEntryC( ID_2_R_FETCH, "2R@", 0 );
178 CreateDicEntryC( ID_2_R_FROM, "2R>", 0 );
179 CreateDicEntryC( ID_2_TO_R, "2>R", 0 );
180 CreateDicEntryC( ID_2DUP, "2DUP", 0 );
181 CreateDicEntryC( ID_2LITERAL, "2LITERAL", FLAG_IMMEDIATE );
182 CreateDicEntryC( ID_2LITERAL_P, "(2LITERAL)", 0 );
183 CreateDicEntryC( ID_2MINUS, "2-", 0 );
184 CreateDicEntryC( ID_2PLUS, "2+", 0 );
185 CreateDicEntryC( ID_2OVER, "2OVER", 0 );
186 CreateDicEntryC( ID_2SWAP, "2SWAP", 0 );
187 CreateDicEntryC( ID_ACCEPT_P, "(ACCEPT)", 0 );
188 CreateDeferredC( ID_ACCEPT_P, "ACCEPT" );
189 CreateDicEntryC( ID_ALITERAL, "ALITERAL", FLAG_IMMEDIATE );
190 CreateDicEntryC( ID_ALITERAL_P, "(ALITERAL)", 0 );
191 CreateDicEntryC( ID_ALLOCATE, "ALLOCATE", 0 );
192 pfDebugMessage("pfBuildDictionary: added ALLOCATE\n");
193 CreateDicEntryC( ID_ARSHIFT, "ARSHIFT", 0 );
194 CreateDicEntryC( ID_AND, "AND", 0 );
195 CreateDicEntryC( ID_BAIL, "BAIL", 0 );
196 CreateDicEntryC( ID_BRANCH, "BRANCH", 0 );
197 CreateDicEntryC( ID_BODY_OFFSET, "BODY_OFFSET", 0 );
198 CreateDicEntryC( ID_BYE, "BYE", 0 );
199 CreateDicEntryC( ID_CATCH, "CATCH", 0 );
200 CreateDicEntryC( ID_CELL, "CELL", 0 );
201 CreateDicEntryC( ID_CELLS, "CELLS", 0 );
202 CreateDicEntryC( ID_CFETCH, "C@", 0 );
203 CreateDicEntryC( ID_CMOVE, "CMOVE", 0 );
204 CreateDicEntryC( ID_CMOVE_UP, "CMOVE>", 0 );
205 CreateDicEntryC( ID_COLON, ":", 0 );
206 CreateDicEntryC( ID_COLON_P, "(:)", 0 );
207 CreateDicEntryC( ID_COMPARE, "COMPARE", 0 );
208 CreateDicEntryC( ID_COMP_EQUAL, "=", 0 );
209 CreateDicEntryC( ID_COMP_NOT_EQUAL, "<>", 0 );
210 CreateDicEntryC( ID_COMP_GREATERTHAN, ">", 0 );
211 CreateDicEntryC( ID_COMP_U_GREATERTHAN, "U>", 0 );
212 pfDebugMessage("pfBuildDictionary: added U>\n");
213 CreateDicEntryC( ID_COMP_LESSTHAN, "<", 0 );
214 CreateDicEntryC( ID_COMP_U_LESSTHAN, "U<", 0 );
215 CreateDicEntryC( ID_COMP_ZERO_EQUAL, "0=", 0 );
216 CreateDicEntryC( ID_COMP_ZERO_NOT_EQUAL, "0<>", 0 );
217 CreateDicEntryC( ID_COMP_ZERO_GREATERTHAN, "0>", 0 );
218 CreateDicEntryC( ID_COMP_ZERO_LESSTHAN, "0<", 0 );
219 CreateDicEntryC( ID_CR, "CR", 0 );
220 CreateDicEntryC( ID_CREATE, "CREATE", 0 );
221 CreateDicEntryC( ID_CREATE_P, "(CREATE)", 0 );
222 CreateDicEntryC( ID_D_PLUS, "D+", 0 );
223 CreateDicEntryC( ID_D_MINUS, "D-", 0 );
224 CreateDicEntryC( ID_D_UMSMOD, "UM/MOD", 0 );
225 CreateDicEntryC( ID_D_MUSMOD, "MU/MOD", 0 );
226 CreateDicEntryC( ID_D_MTIMES, "M*", 0 );
227 pfDebugMessage("pfBuildDictionary: added M*\n");
228 CreateDicEntryC( ID_D_UMTIMES, "UM*", 0 );
229 CreateDicEntryC( ID_DEFER, "DEFER", 0 );
230 CreateDicEntryC( ID_CSTORE, "C!", 0 );
231 CreateDicEntryC( ID_DEPTH, "DEPTH", 0 );
232 pfDebugMessage("pfBuildDictionary: added DEPTH\n");
233 CreateDicEntryC( ID_DIVIDE, "/", 0 );
234 CreateDicEntryC( ID_DOT, ".", 0 );
235 CreateDicEntryC( ID_DOTS, ".S", 0 );
236 pfDebugMessage("pfBuildDictionary: added .S\n");
237 CreateDicEntryC( ID_DO_P, "(DO)", 0 );
238 CreateDicEntryC( ID_DROP, "DROP", 0 );
239 CreateDicEntryC( ID_DUMP, "DUMP", 0 );
240 CreateDicEntryC( ID_DUP, "DUP", 0 );
241 CreateDicEntryC( ID_EMIT_P, "(EMIT)", 0 );
242 pfDebugMessage("pfBuildDictionary: added (EMIT)\n");
243 CreateDeferredC( ID_EMIT_P, "EMIT");
244 pfDebugMessage("pfBuildDictionary: added EMIT\n");
245 CreateDicEntryC( ID_EOL, "EOL", 0 );
246 CreateDicEntryC( ID_ERRORQ_P, "(?ERROR)", 0 );
247 CreateDicEntryC( ID_ERRORQ_P, "?ERROR", 0 );
248 CreateDicEntryC( ID_EXECUTE, "EXECUTE", 0 );
249 CreateDicEntryC( ID_FETCH, "@", 0 );
250 CreateDicEntryC( ID_FILL, "FILL", 0 );
251 CreateDicEntryC( ID_FIND, "FIND", 0 );
252 CreateDicEntryC( ID_FILE_CREATE, "CREATE-FILE", 0 );
253 CreateDicEntryC( ID_FILE_DELETE, "DELETE-FILE", 0 );
254 CreateDicEntryC( ID_FILE_OPEN, "OPEN-FILE", 0 );
255 CreateDicEntryC( ID_FILE_CLOSE, "CLOSE-FILE", 0 );
256 CreateDicEntryC( ID_FILE_READ, "READ-FILE", 0 );
257 CreateDicEntryC( ID_FILE_SIZE, "FILE-SIZE", 0 );
258 CreateDicEntryC( ID_FILE_WRITE, "WRITE-FILE", 0 );
259 CreateDicEntryC( ID_FILE_POSITION, "FILE-POSITION", 0 );
260 CreateDicEntryC( ID_FILE_REPOSITION, "REPOSITION-FILE", 0 );
261 CreateDicEntryC( ID_FILE_RO, "R/O", 0 );
262 CreateDicEntryC( ID_FILE_RW, "R/W", 0 );
263 CreateDicEntryC( ID_FILE_WO, "W/O", 0 );
264 CreateDicEntryC( ID_FILE_BIN, "BIN", 0 );
265 CreateDicEntryC( ID_FINDNFA, "FINDNFA", 0 );
266 CreateDicEntryC( ID_FLUSHEMIT, "FLUSHEMIT", 0 );
267 CreateDicEntryC( ID_FREE, "FREE", 0 );
268 #include "pfcompfp.h"
269 CreateDicEntryC( ID_HERE, "HERE", 0 );
270 CreateDicEntryC( ID_NUMBERQ_P, "(SNUMBER?)", 0 );
271 CreateDicEntryC( ID_I, "I", 0 );
272 CreateDicEntryC( ID_INTERPRET, "INTERPRET", 0 );
273 CreateDicEntryC( ID_J, "J", 0 );
274 CreateDicEntryC( ID_INCLUDE_FILE, "INCLUDE-FILE", 0 );
275 CreateDicEntryC( ID_KEY, "KEY", 0 );
276 CreateDicEntryC( ID_LEAVE_P, "(LEAVE)", 0 );
277 CreateDicEntryC( ID_LITERAL, "LITERAL", FLAG_IMMEDIATE );
278 CreateDicEntryC( ID_LITERAL_P, "(LITERAL)", 0 );
279 CreateDicEntryC( ID_LOADSYS, "LOADSYS", 0 );
280 CreateDicEntryC( ID_LOCAL_COMPILER, "LOCAL-COMPILER", 0 );
281 CreateDicEntryC( ID_LOCAL_ENTRY, "(LOCAL.ENTRY)", 0 );
282 CreateDicEntryC( ID_LOCAL_EXIT, "(LOCAL.EXIT)", 0 );
283 CreateDicEntryC( ID_LOCAL_FETCH, "(LOCAL@)", 0 );
284 CreateDicEntryC( ID_LOCAL_FETCH_1, "(1_LOCAL@)", 0 );
285 CreateDicEntryC( ID_LOCAL_FETCH_2, "(2_LOCAL@)", 0 );
286 CreateDicEntryC( ID_LOCAL_FETCH_3, "(3_LOCAL@)", 0 );
287 CreateDicEntryC( ID_LOCAL_FETCH_4, "(4_LOCAL@)", 0 );
288 CreateDicEntryC( ID_LOCAL_FETCH_5, "(5_LOCAL@)", 0 );
289 CreateDicEntryC( ID_LOCAL_FETCH_6, "(6_LOCAL@)", 0 );
290 CreateDicEntryC( ID_LOCAL_FETCH_7, "(7_LOCAL@)", 0 );
291 CreateDicEntryC( ID_LOCAL_FETCH_8, "(8_LOCAL@)", 0 );
292 CreateDicEntryC( ID_LOCAL_STORE, "(LOCAL!)", 0 );
293 CreateDicEntryC( ID_LOCAL_STORE_1, "(1_LOCAL!)", 0 );
294 CreateDicEntryC( ID_LOCAL_STORE_2, "(2_LOCAL!)", 0 );
295 CreateDicEntryC( ID_LOCAL_STORE_3, "(3_LOCAL!)", 0 );
296 CreateDicEntryC( ID_LOCAL_STORE_4, "(4_LOCAL!)", 0 );
297 CreateDicEntryC( ID_LOCAL_STORE_5, "(5_LOCAL!)", 0 );
298 CreateDicEntryC( ID_LOCAL_STORE_6, "(6_LOCAL!)", 0 );
299 CreateDicEntryC( ID_LOCAL_STORE_7, "(7_LOCAL!)", 0 );
300 CreateDicEntryC( ID_LOCAL_STORE_8, "(8_LOCAL!)", 0 );
301 CreateDicEntryC( ID_LOCAL_PLUSSTORE, "(LOCAL+!)", 0 );
302 CreateDicEntryC( ID_LOOP_P, "(LOOP)", 0 );
303 CreateDicEntryC( ID_LSHIFT, "LSHIFT", 0 );
304 CreateDicEntryC( ID_MAX, "MAX", 0 );
305 CreateDicEntryC( ID_MIN, "MIN", 0 );
306 CreateDicEntryC( ID_MINUS, "-", 0 );
307 CreateDicEntryC( ID_NAME_TO_TOKEN, "NAME>", 0 );
308 CreateDicEntryC( ID_NAME_TO_PREVIOUS, "PREVNAME", 0 );
309 CreateDicEntryC( ID_NOOP, "NOOP", 0 );
310 CreateDeferredC( ID_NUMBERQ_P, "NUMBER?" );
311 CreateDicEntryC( ID_OR, "OR", 0 );
312 CreateDicEntryC( ID_OVER, "OVER", 0 );
313 pfDebugMessage("pfBuildDictionary: added OVER\n");
314 CreateDicEntryC( ID_PICK, "PICK", 0 );
315 CreateDicEntryC( ID_PLUS, "+", 0 );
316 CreateDicEntryC( ID_PLUSLOOP_P, "(+LOOP)", 0 );
317 CreateDicEntryC( ID_PLUS_STORE, "+!", 0 );
318 CreateDicEntryC( ID_QUIT_P, "(QUIT)", 0 );
319 CreateDeferredC( ID_QUIT_P, "QUIT" );
320 CreateDicEntryC( ID_QDO_P, "(?DO)", 0 );
321 CreateDicEntryC( ID_QDUP, "?DUP", 0 );
322 CreateDicEntryC( ID_QTERMINAL, "?TERMINAL", 0 );
323 CreateDicEntryC( ID_QTERMINAL, "KEY?", 0 );
324 CreateDicEntryC( ID_REFILL, "REFILL", 0 );
325 CreateDicEntryC( ID_RESIZE, "RESIZE", 0 );
326 CreateDicEntryC( ID_ROLL, "ROLL", 0 );
327 CreateDicEntryC( ID_ROT, "ROT", 0 );
328 CreateDicEntryC( ID_RSHIFT, "RSHIFT", 0 );
329 CreateDicEntryC( ID_R_DROP, "RDROP", 0 );
330 CreateDicEntryC( ID_R_FETCH, "R@", 0 );
331 CreateDicEntryC( ID_R_FROM, "R>", 0 );
332 CreateDicEntryC( ID_RP_FETCH, "RP@", 0 );
333 CreateDicEntryC( ID_RP_STORE, "RP!", 0 );
334 CreateDicEntryC( ID_SEMICOLON, ";", FLAG_IMMEDIATE );
335 CreateDicEntryC( ID_SP_FETCH, "SP@", 0 );
336 CreateDicEntryC( ID_SP_STORE, "SP!", 0 );
337 CreateDicEntryC( ID_STORE, "!", 0 );
338 CreateDicEntryC( ID_SAVE_FORTH_P, "(SAVE-FORTH)", 0 );
339 CreateDicEntryC( ID_SCAN, "SCAN", 0 );
340 CreateDicEntryC( ID_SKIP, "SKIP", 0 );
341 CreateDicEntryC( ID_SOURCE, "SOURCE", 0 );
342 CreateDicEntryC( ID_SOURCE_SET, "SET-SOURCE", 0 );
343 CreateDicEntryC( ID_SOURCE_ID, "SOURCE-ID", 0 );
344 CreateDicEntryC( ID_SOURCE_ID_PUSH, "PUSH-SOURCE-ID", 0 );
345 CreateDicEntryC( ID_SOURCE_ID_POP, "POP-SOURCE-ID", 0 );
346 CreateDicEntryC( ID_SWAP, "SWAP", 0 );
347 CreateDicEntryC( ID_TEST1, "TEST1", 0 );
348 CreateDicEntryC( ID_TEST2, "TEST2", 0 );
349 CreateDicEntryC( ID_TICK, "'", 0 );
350 CreateDicEntryC( ID_TIMES, "*", 0 );
351 CreateDicEntryC( ID_THROW, "THROW", 0 );
352 CreateDicEntryC( ID_TO_R, ">R", 0 );
353 CreateDicEntryC( ID_TYPE, "TYPE", 0 );
354 CreateDicEntryC( ID_VAR_BASE, "BASE", 0 );
355 CreateDicEntryC( ID_VAR_CODE_BASE, "CODE-BASE", 0 );
356 CreateDicEntryC( ID_VAR_CODE_LIMIT, "CODE-LIMIT", 0 );
357 CreateDicEntryC( ID_VAR_CONTEXT, "CONTEXT", 0 );
358 CreateDicEntryC( ID_VAR_DP, "DP", 0 );
359 CreateDicEntryC( ID_VAR_ECHO, "ECHO", 0 );
360 CreateDicEntryC( ID_VAR_HEADERS_PTR, "HEADERS-PTR", 0 );
361 CreateDicEntryC( ID_VAR_HEADERS_BASE, "HEADERS-BASE", 0 );
362 CreateDicEntryC( ID_VAR_HEADERS_LIMIT, "HEADERS-LIMIT", 0 );
363 CreateDicEntryC( ID_VAR_NUM_TIB, "#TIB", 0 );
364 CreateDicEntryC( ID_VAR_RETURN_CODE, "RETURN-CODE", 0 );
365 CreateDicEntryC( ID_VAR_TRACE_FLAGS, "TRACE-FLAGS", 0 );
366 CreateDicEntryC( ID_VAR_TRACE_LEVEL, "TRACE-LEVEL", 0 );
367 CreateDicEntryC( ID_VAR_TRACE_STACK, "TRACE-STACK", 0 );
368 CreateDicEntryC( ID_VAR_OUT, "OUT", 0 );
369 CreateDicEntryC( ID_VAR_STATE, "STATE", 0 );
370 CreateDicEntryC( ID_VAR_TO_IN, ">IN", 0 );
371 CreateDicEntryC( ID_WORD, "WORD", 0 );
372 CreateDicEntryC( ID_WORD_FETCH, "W@", 0 );
373 CreateDicEntryC( ID_WORD_STORE, "W!", 0 );
374 CreateDicEntryC( ID_XOR, "XOR", 0 );
375 CreateDicEntryC( ID_ZERO_BRANCH, "0BRANCH", 0 );
377 pfDebugMessage("pfBuildDictionary: FindSpecialXTs\n");
378 if( FindSpecialXTs() < 0 ) goto error;
380 if( CompileCustomFunctions() < 0 ) goto error; /* Call custom 'C' call builder. */
383 DumpMemory( dic->dic_HeaderBase, 256 );
384 DumpMemory( dic->dic_CodeBase, 256 );
387 pfDebugMessage("pfBuildDictionary: Finished adding dictionary entries.\n");
388 return (PForthDictionary) dic;
391 pfDebugMessage("pfBuildDictionary: Error adding dictionary entries.\n");
392 pfDeleteDictionary( dic );
398 #endif /* !PF_NO_INIT */
401 ** ( xt -- nfa 1 , x 0 , find NFA in dictionary from XT )
402 ** 1 for IMMEDIATE values
404 cell_t ffTokenToName( ExecToken XT, const ForthString **NFAPtr )
406 const ForthString *NameField;
407 cell_t Searching = TRUE;
411 NameField = (ForthString *) gVarContext;
412 DBUGX(("\ffCodeToName: gVarContext = 0x%x\n", gVarContext));
416 TempXT = NameToToken( NameField );
420 DBUGX(("ffCodeToName: NFA = 0x%x\n", NameField));
421 *NFAPtr = NameField ;
427 NameField = NameToPrevious( NameField );
428 if( NameField == NULL )
434 } while ( Searching);
440 ** ( $name -- $addr 0 | nfa -1 | nfa 1 , find NFA in dictionary )
441 ** 1 for IMMEDIATE values
443 cell_t ffFindNFA( const ForthString *WordName, const ForthString **NFAPtr )
445 const ForthString *WordChar;
447 const char *NameField, *NameChar;
449 cell_t Searching = TRUE;
452 WordLen = (uint8_t) ((ucell_t)*WordName & 0x1F);
453 WordChar = WordName+1;
455 NameField = (ForthString *) gVarContext;
456 DBUG(("\nffFindNFA: WordLen = %d, WordName = %*s\n", WordLen, WordLen, WordChar ));
457 DBUG(("\nffFindNFA: gVarContext = 0x%x\n", gVarContext));
460 NameLen = (uint8_t) ((ucell_t)(*NameField) & MASK_NAME_SIZE);
461 NameChar = NameField+1;
462 /* DBUG((" %c\n", (*NameField & FLAG_SMUDGE) ? 'S' : 'V' )); */
463 if( ((*NameField & FLAG_SMUDGE) == 0) &&
464 (NameLen == WordLen) &&
465 ffCompareTextCaseN( NameChar, WordChar, WordLen ) ) /* FIXME - slow */
467 DBUG(("ffFindNFA: found it at NFA = 0x%x\n", NameField));
468 *NFAPtr = NameField ;
469 Result = ((*NameField) & FLAG_IMMEDIATE) ? 1 : -1;
474 NameField = NameToPrevious( NameField );
475 if( NameField == NULL )
481 } while ( Searching);
482 DBUG(("ffFindNFA: returns 0x%x\n", Result));
487 /***************************************************************
488 ** ( $name -- $name 0 | xt -1 | xt 1 )
489 ** 1 for IMMEDIATE values
491 cell_t ffFind( const ForthString *WordName, ExecToken *pXT )
493 const ForthString *NFA;
496 Result = ffFindNFA( WordName, &NFA );
497 DBUG(("ffFind: %8s at 0x%x\n", WordName+1, NFA)); /* WARNING, not NUL terminated. %Q */
500 *pXT = NameToToken( NFA );
504 *pXT = (ExecToken) WordName;
510 /****************************************************************
511 ** Find name when passed 'C' string.
513 cell_t ffFindC( const char *WordName, ExecToken *pXT )
515 DBUG(("ffFindC: %s\n", WordName ));
516 CStringToForth( gScratch, WordName, sizeof(gScratch) );
517 return ffFind( gScratch, pXT );
521 /***********************************************************/
522 /********* Compiling New Words *****************************/
523 /***********************************************************/
524 #define DIC_SAFETY_MARGIN (400)
526 /*************************************************************
527 ** Check for dictionary overflow.
529 static cell_t ffCheckDicRoom( void )
532 RoomLeft = (char *)gCurrentDictionary->dic_HeaderLimit -
533 (char *)gCurrentDictionary->dic_HeaderPtr;
534 if( RoomLeft < DIC_SAFETY_MARGIN )
536 pfReportError("ffCheckDicRoom", PF_ERR_HEADER_ROOM);
537 return PF_ERR_HEADER_ROOM;
540 RoomLeft = (char *)gCurrentDictionary->dic_CodeLimit -
541 (char *)gCurrentDictionary->dic_CodePtr.Byte;
542 if( RoomLeft < DIC_SAFETY_MARGIN )
544 pfReportError("ffCheckDicRoom", PF_ERR_CODE_ROOM);
545 return PF_ERR_CODE_ROOM;
550 /*************************************************************
551 ** Create a dictionary entry given a string name.
553 void ffCreateSecondaryHeader( const ForthStringPtr FName)
555 pfDebugMessage("ffCreateSecondaryHeader()\n");
556 /* Check for dictionary overflow. */
557 if( ffCheckDicRoom() ) return;
559 pfDebugMessage("ffCreateSecondaryHeader: CheckRedefinition()\n");
560 CheckRedefinition( FName );
561 /* Align CODE_HERE */
562 CODE_HERE = (cell_t *)( (((ucell_t)CODE_HERE) + UINT32_MASK) & ~UINT32_MASK);
563 CreateDicEntry( (ExecToken) ABS_TO_CODEREL(CODE_HERE), FName, FLAG_SMUDGE );
566 /*************************************************************
567 ** Begin compiling a secondary word.
569 static void ffStringColon( const ForthStringPtr FName)
571 ffCreateSecondaryHeader( FName );
575 /*************************************************************
576 ** Read the next ExecToken from the Source and create a word.
582 gDepthAtColon = DATA_STACK_DEPTH;
584 FName = ffWord( BLANK );
587 ffStringColon( FName );
591 /*************************************************************
592 ** Check to see if name is already in dictionary.
594 static cell_t CheckRedefinition( const ForthStringPtr FName )
599 flag = ffFind( FName, &XT);
600 if ( flag && !gVarQuiet)
602 ioType( FName+1, (cell_t) *FName );
603 MSG( " redefined.\n" ); /* FIXME - allow user to run off this warning. */
608 void ffStringCreate( char *FName)
610 ffCreateSecondaryHeader( FName );
612 CODE_COMMA( ID_CREATE_P );
613 CODE_COMMA( ID_EXIT );
618 /* Read the next ExecToken from the Source and create a word. */
619 void ffCreate( void )
623 FName = ffWord( BLANK );
626 ffStringCreate( FName );
630 void ffStringDefer( const ForthStringPtr FName, ExecToken DefaultXT )
632 pfDebugMessage("ffStringDefer()\n");
633 ffCreateSecondaryHeader( FName );
635 CODE_COMMA( ID_DEFER_P );
636 CODE_COMMA( DefaultXT );
642 /* Convert name then create deferred dictionary entry. */
643 static void CreateDeferredC( ExecToken DefaultXT, const char *CName )
646 CStringToForth( FName, CName, sizeof(FName) );
647 ffStringDefer( FName, DefaultXT );
651 /* Read the next token from the Source and create a word. */
656 FName = ffWord( BLANK );
659 ffStringDefer( FName, ID_QUIT_P );
663 /* Unsmudge the word to make it visible. */
664 static void ffUnSmudge( void )
666 *(char*)gVarContext &= ~FLAG_SMUDGE;
670 ThrowCode ffSemiColon( void )
672 ThrowCode exception = 0;
675 if( (gDepthAtColon != DATA_STACK_DEPTH) &&
676 (gDepthAtColon != DEPTH_AT_COLON_INVALID) ) /* Ignore if no ':' */
678 exception = THROW_SEMICOLON;
684 gDepthAtColon = DEPTH_AT_COLON_INVALID;
688 /* Finish the definition of a Forth word. */
689 void ffFinishSecondary( void )
691 CODE_COMMA( ID_EXIT );
695 /**************************************************************/
696 /* Used to pull a number from the dictionary to the stack */
697 void ff2Literal( cell_t dHi, cell_t dLo )
699 CODE_COMMA( ID_2LITERAL_P );
703 void ffALiteral( cell_t Num )
705 CODE_COMMA( ID_ALITERAL_P );
708 void ffLiteral( cell_t Num )
710 CODE_COMMA( ID_LITERAL_P );
715 void ffFPLiteral( PF_FLOAT fnum )
717 /* Hack for Metrowerks complier which won't compile the
718 * original expression.
723 /* Make sure that literal float data is float aligned. */
724 dicPtr = CODE_HERE + 1;
725 while( (((ucell_t) dicPtr++) & (sizeof(PF_FLOAT) - 1)) != 0)
727 DBUG((" comma NOOP to align FPLiteral\n"));
728 CODE_COMMA( ID_NOOP );
730 CODE_COMMA( ID_FP_FLITERAL_P );
732 temp = (PF_FLOAT *)CODE_HERE;
733 WRITE_FLOAT_DIC(temp,fnum); /* Write to dictionary. */
735 CODE_HERE = (cell_t *) temp;
737 #endif /* PF_SUPPORT_FP */
739 /**************************************************************/
740 static ThrowCode FindAndCompile( const char *theWord )
745 ThrowCode exception = 0;
747 Flag = ffFind( theWord, &XT);
748 DBUG(("FindAndCompile: theWord = %8s, XT = 0x%x, Flag = %d\n", theWord, XT, Flag ));
750 /* Is it a normal word ? */
753 if( gVarState ) /* compiling? */
759 exception = pfCatch( XT );
762 else if ( Flag == 1 ) /* or is it IMMEDIATE ? */
764 DBUG(("FindAndCompile: IMMEDIATE, theWord = 0x%x\n", theWord ));
765 exception = pfCatch( XT );
767 else /* try to interpret it as a number. */
769 /* Call deferred NUMBER? */
772 DBUG(("FindAndCompile: not found, try number?\n" ));
773 PUSH_DATA_STACK( theWord ); /* Push text of number */
774 exception = pfCatch( gNumberQ_XT );
775 if( exception ) goto error;
777 DBUG(("FindAndCompile: after number?\n" ));
778 NumResult = POP_DATA_STACK; /* Success? */
781 case NUM_TYPE_SINGLE:
782 if( gVarState ) /* compiling? */
784 Num = POP_DATA_STACK;
789 case NUM_TYPE_DOUBLE:
790 if( gVarState ) /* compiling? */
792 Num = POP_DATA_STACK; /* get hi portion */
793 ff2Literal( Num, POP_DATA_STACK );
799 if( gVarState ) /* compiling? */
801 ffFPLiteral( *gCurrentTask->td_FloatStackPtr++ );
808 ioType( theWord+1, *theWord );
809 MSG( " ? - unrecognized word!\n" );
810 exception = THROW_UNDEFINED_WORD;
819 /**************************************************************
820 ** Forth outer interpreter. Parses words from Source.
821 ** Executes them or compiles them based on STATE.
823 ThrowCode ffInterpret( void )
827 ThrowCode exception = 0;
829 /* Is there any text left in Source ? */
830 while( gCurrentTask->td_IN < (gCurrentTask->td_SourceNum) )
833 pfDebugMessage("ffInterpret: calling ffWord(()\n");
834 theWord = ffLWord( BLANK );
835 DBUG(("ffInterpret: theWord = 0x%x, Len = %d\n", theWord, *theWord ));
840 if( gLocalCompiler_XT )
842 PUSH_DATA_STACK( theWord ); /* Push word. */
843 exception = pfCatch( gLocalCompiler_XT );
844 if( exception ) goto error;
845 flag = POP_DATA_STACK; /* Compiled local? */
849 exception = FindAndCompile( theWord );
850 if( exception ) goto error;
854 DBUG(("ffInterpret: IN=%d, SourceNum=%d\n", gCurrentTask->td_IN,
855 gCurrentTask->td_SourceNum ) );
861 /**************************************************************/
862 ThrowCode ffOK( void )
864 cell_t exception = 0;
865 /* Check for stack underflow. %Q what about overflows? */
866 if( (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr) < 0 )
868 exception = THROW_STACK_UNDERFLOW;
870 #ifdef PF_SUPPORT_FP /* Check floating point stack too! */
871 else if((gCurrentTask->td_FloatStackBase - gCurrentTask->td_FloatStackPtr) < 0)
873 exception = THROW_FLOAT_STACK_UNDERFLOW;
876 else if( gCurrentTask->td_InputStream == PF_STDIN)
878 if( !gVarState ) /* executing? */
883 if(gVarTraceStack) ffDotS();
894 /***************************************************************
895 ** Cleanup Include stack by popping and closing files.
896 ***************************************************************/
897 void pfHandleIncludeError( void )
901 while( (cur = ffPopInputStream()) != PF_STDIN)
903 DBUG(("ffCleanIncludeStack: closing 0x%x\n", cur ));
908 /***************************************************************
909 ** Interpret input in a loop.
910 ***************************************************************/
911 ThrowCode ffOuterInterpreterLoop( void )
913 cell_t exception = 0;
916 exception = ffRefill();
917 if(exception <= 0) break;
919 exception = ffInterpret();
925 } while( exception == 0 );
929 /***************************************************************
930 ** Include then close a file
931 ***************************************************************/
933 ThrowCode ffIncludeFile( FileStream *InputFile )
937 /* Push file stream. */
938 exception = ffPushInputStream( InputFile );
939 if( exception < 0 ) return exception;
941 /* Run outer interpreter for stream. */
942 exception = ffOuterInterpreterLoop();
946 /* Report line number and nesting level. */
947 MSG("INCLUDE error on line #"); ffDot(gCurrentTask->td_LineNumber);
948 MSG(", level = "); ffDot(gIncludeIndex );
951 /* Dump line of error and show offset in line for >IN */
952 for( i=0; i<gCurrentTask->td_SourceNum; i++ )
954 char c = gCurrentTask->td_SourcePtr[i];
955 if( c == '\t' ) c = ' ';
959 for( i=0; i<(gCurrentTask->td_IN - 1); i++ ) EMIT('^');
963 /* Pop file stream. */
966 /* ANSI spec specifies that this should also close the file. */
967 sdCloseFile(InputFile);
972 #endif /* !PF_NO_SHELL */
974 /***************************************************************
975 ** Save current input stream on stack, use this new one.
976 ***************************************************************/
977 Err ffPushInputStream( FileStream *InputFile )
982 /* Push current input state onto special include stack. */
983 if( gIncludeIndex < MAX_INCLUDE_DEPTH )
985 inf = &gIncludeStack[gIncludeIndex++];
986 inf->inf_FileID = gCurrentTask->td_InputStream;
987 inf->inf_IN = gCurrentTask->td_IN;
988 inf->inf_LineNumber = gCurrentTask->td_LineNumber;
989 inf->inf_SourceNum = gCurrentTask->td_SourceNum;
990 /* Copy TIB plus any NUL terminator into saved area. */
991 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
993 pfCopyMemory( inf->inf_SaveTIB, gCurrentTask->td_TIB, inf->inf_SourceNum+1 );
996 /* Set new current input. */
997 DBUG(( "ffPushInputStream: InputFile = 0x%x\n", InputFile ));
998 gCurrentTask->td_InputStream = InputFile;
999 gCurrentTask->td_LineNumber = 0;
1003 ERR("ffPushInputStream: max depth exceeded.\n");
1011 /***************************************************************
1012 ** Go back to reading previous stream.
1013 ** Just return gCurrentTask->td_InputStream upon underflow.
1014 ***************************************************************/
1015 FileStream *ffPopInputStream( void )
1020 DBUG(("ffPopInputStream: gIncludeIndex = %d\n", gIncludeIndex));
1021 Result = gCurrentTask->td_InputStream;
1023 /* Restore input state. */
1024 if( gIncludeIndex > 0 )
1026 inf = &gIncludeStack[--gIncludeIndex];
1027 gCurrentTask->td_InputStream = inf->inf_FileID;
1028 DBUG(("ffPopInputStream: stream = 0x%x\n", gCurrentTask->td_InputStream ));
1029 gCurrentTask->td_IN = inf->inf_IN;
1030 gCurrentTask->td_LineNumber = inf->inf_LineNumber;
1031 gCurrentTask->td_SourceNum = inf->inf_SourceNum;
1032 /* Copy TIB plus any NUL terminator into saved area. */
1033 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
1035 pfCopyMemory( gCurrentTask->td_TIB, inf->inf_SaveTIB, inf->inf_SourceNum+1 );
1039 DBUG(("ffPopInputStream: return = 0x%x\n", Result ));
1044 /***************************************************************
1045 ** Convert file pointer to value consistent with SOURCE-ID.
1046 ***************************************************************/
1047 cell_t ffConvertStreamToSourceID( FileStream *Stream )
1050 if(Stream == PF_STDIN)
1054 else if(Stream == NULL)
1060 Result = (cell_t) Stream;
1065 /***************************************************************
1066 ** Convert file pointer to value consistent with SOURCE-ID.
1067 ***************************************************************/
1068 FileStream * ffConvertSourceIDToStream( cell_t id )
1082 stream = (FileStream *) id;
1087 /**************************************************************
1088 ** Receive line from input stream.
1089 ** Return length, or -1 for EOF.
1091 #define BACKSPACE (8)
1092 static cell_t readLineFromStream( char *buffer, cell_t maxChars, FileStream *stream )
1097 static int lastChar = 0;
1100 DBUGX(("readLineFromStream(0x%x, 0x%x, 0x%x)\n", buffer, len, stream ));
1103 while( (len < maxChars) && !done )
1105 c = sdInputChar(stream);
1111 if( len <= 0 ) len = -1;
1115 DBUGX(("EOL=\\n\n"));
1116 if( lastChar != '\r' ) done = 1;
1120 DBUGX(("EOL=\\r\n"));
1132 /* NUL terminate line to simplify printing when debugging. */
1133 if( (len >= 0) && (len < maxChars) ) p[len] = '\0';
1138 /**************************************************************
1139 ** ( -- , fill Source from current stream )
1140 ** Return 1 if successful, 0 for EOF, or a negative error.
1142 cell_t ffRefill( void )
1147 /* reset >IN for parser */
1148 gCurrentTask->td_IN = 0;
1150 /* get line from current stream */
1151 if( gCurrentTask->td_InputStream == PF_STDIN )
1153 /* ACCEPT is deferred so we call it through the dictionary. */
1154 PUSH_DATA_STACK( gCurrentTask->td_SourcePtr );
1155 PUSH_DATA_STACK( TIB_SIZE );
1156 pfCatch( gAcceptP_XT );
1157 Num = POP_DATA_STACK;
1166 Num = readLineFromStream( gCurrentTask->td_SourcePtr, TIB_SIZE,
1167 gCurrentTask->td_InputStream );
1175 gCurrentTask->td_SourceNum = Num;
1176 gCurrentTask->td_LineNumber++; /* Bump for include. */
1178 /* echo input if requested */
1179 if( gVarEcho && ( Num > 0))
1181 ioType( gCurrentTask->td_SourcePtr, gCurrentTask->td_SourceNum );