projects / pforth / blame
? search:
summary | tags | clone url | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
hmsl: support EOT to force BYE
[pforth] / csrc / pfcompil.c
CommitLineData
8e9db35f
PB		 1/* @(#) pfcompil.c 98/01/26 1.5 */
2/***************************************************************
3** Compiler for PForth based on 'C'
4**
5** These routines could be left out of an execute only version.
6**
7** Author: Phil Burk
8** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
9**
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.
18**
19****************************************************************
20** 941004 PLB Extracted IO calls from pforth_main.c
21** 950320 RDG Added underflow checking for FP stack
22***************************************************************/
23
24#include "pf_all.h"
25#include "pfcompil.h"
26
27#define ABORT_RETURN_CODE (10)
28#define UINT32_MASK ((sizeof(ucell_t)-1))
29
30/***************************************************************/
31/************** Static Prototypes ******************************/
32/***************************************************************/
33
34static void ffStringColon( const ForthStringPtr FName );
35static cell_t CheckRedefinition( const ForthStringPtr FName );
36static void ffUnSmudge( void );
37static cell_t FindAndCompile( const char *theWord );
38static cell_t ffCheckDicRoom( void );
39
40#ifndef PF_NO_INIT
41 static void CreateDeferredC( ExecToken DefaultXT, const char *CName );
42#endif
43
44cell_t NotCompiled( const char *FunctionName )
45{
46 MSG("Function ");
47 MSG(FunctionName);
48 MSG(" not compiled in this version of PForth.\n");
49 return -1;
50}
51
52#ifndef PF_NO_SHELL
53/***************************************************************
54** Create an entry in the Dictionary for the given ExecutionToken.
55** FName is name in Forth format.
56*/
57void CreateDicEntry( ExecToken XT, const ForthStringPtr FName, ucell_t Flags )
58{
59 cfNameLinks *cfnl;
60
61 cfnl = (cfNameLinks *) gCurrentDictionary->dic_HeaderPtr;
62
63/* Set link to previous header, if any. */
64 if( gVarContext )
65 {
66 WRITE_CELL_DIC( &cfnl->cfnl_PreviousName, ABS_TO_NAMEREL( gVarContext ) );
67 }
68 else
69 {
70 cfnl->cfnl_PreviousName = 0;
71 }
72
73/* Put Execution token in header. */
74 WRITE_CELL_DIC( &cfnl->cfnl_ExecToken, XT );
75
76/* Advance Header Dictionary Pointer */
77 gCurrentDictionary->dic_HeaderPtr += sizeof(cfNameLinks);
78
79/* Laydown name. */
80 gVarContext = gCurrentDictionary->dic_HeaderPtr;
81 pfCopyMemory( (uint8_t *) gCurrentDictionary->dic_HeaderPtr, FName, (*FName)+1 );
82 gCurrentDictionary->dic_HeaderPtr += (*FName)+1;
83
84/* Set flags. */
85 *(char*)gVarContext |= (char) Flags;
86
87/* Align to quad byte boundaries with zeroes. */
88 while( gCurrentDictionary->dic_HeaderPtr & UINT32_MASK )
89 {
90 *(char*)(gCurrentDictionary->dic_HeaderPtr++) = 0;
91 }
92}
93
94/***************************************************************
95** Convert name then create dictionary entry.
96*/
97void CreateDicEntryC( ExecToken XT, const char *CName, ucell_t Flags )
98{
99 ForthString FName[40];
100 CStringToForth( FName, CName, sizeof(FName) );
101 CreateDicEntry( XT, FName, Flags );
102}
103
104/***************************************************************
105** Convert absolute namefield address to previous absolute name
106** field address or NULL.
107*/
108const ForthString *NameToPrevious( const ForthString *NFA )
109{
110 cell_t RelNamePtr;
111 const cfNameLinks *cfnl;
112
113/* DBUG(("\nNameToPrevious: NFA = 0x%x\n", (cell_t) NFA)); */
114 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
115
116 RelNamePtr = READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_PreviousName));
117/* DBUG(("\nNameToPrevious: RelNamePtr = 0x%x\n", (cell_t) RelNamePtr )); */
118 if( RelNamePtr )
119 {
120 return ( (ForthString *) NAMEREL_TO_ABS( RelNamePtr ) );
121 }
122 else
123 {
124 return NULL;
125 }
126}
127/***************************************************************
128** Convert NFA to ExecToken.
129*/
130ExecToken NameToToken( const ForthString *NFA )
131{
132 const cfNameLinks *cfnl;
133
134/* Convert absolute namefield address to absolute link field address. */
135 cfnl = (const cfNameLinks *) ( ((const char *) NFA) - sizeof(cfNameLinks) );
136
137 return READ_CELL_DIC((const cell_t *) (&cfnl->cfnl_ExecToken));
138}
139
140/***************************************************************
141** Find XTs needed by compiler.
142*/
143cell_t FindSpecialXTs( void )
144{
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;
148DBUG(("gNumberQ_XT = 0x%x\n", (unsigned int)gNumberQ_XT ));
149 return 0;
150
151nofind:
152 ERR("FindSpecialXTs failed!\n");
153 return -1;
154}
155
156/***************************************************************
157** Build a dictionary from scratch.
158*/
159#ifndef PF_NO_INIT
160PForthDictionary pfBuildDictionary( cell_t HeaderSize, cell_t CodeSize )
161{
162 pfDictionary_t *dic;
163
164 dic = pfCreateDictionary( HeaderSize, CodeSize );
165 if( !dic ) goto nomem;
166
167 pfDebugMessage("pfBuildDictionary: Start adding dictionary entries.\n");
168
169 gCurrentDictionary = dic;
170 gNumPrimitives = NUM_PRIMITIVES;
171
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 );
8bf2fe25 261 CreateDicEntryC( ID_FILE_FLUSH, "FLUSH-FILE", 0 );
6f3de396 262 CreateDicEntryC( ID_FILE_RENAME, "(RENAME-FILE)", 0 );
0b1e2489 263 CreateDicEntryC( ID_FILE_RESIZE, "(RESIZE-FILE)", 0 );
8e9db35f
PB		 264 CreateDicEntryC( ID_FILE_RO, "R/O", 0 );
265 CreateDicEntryC( ID_FILE_RW, "R/W", 0 );
266 CreateDicEntryC( ID_FILE_WO, "W/O", 0 );
267 CreateDicEntryC( ID_FILE_BIN, "BIN", 0 );
268 CreateDicEntryC( ID_FINDNFA, "FINDNFA", 0 );
269 CreateDicEntryC( ID_FLUSHEMIT, "FLUSHEMIT", 0 );
270 CreateDicEntryC( ID_FREE, "FREE", 0 );
271#include "pfcompfp.h"
272 CreateDicEntryC( ID_HERE, "HERE", 0 );
273 CreateDicEntryC( ID_NUMBERQ_P, "(SNUMBER?)", 0 );
274 CreateDicEntryC( ID_I, "I", 0 );
275 CreateDicEntryC( ID_INTERPRET, "INTERPRET", 0 );
276 CreateDicEntryC( ID_J, "J", 0 );
277 CreateDicEntryC( ID_INCLUDE_FILE, "INCLUDE-FILE", 0 );
278 CreateDicEntryC( ID_KEY, "KEY", 0 );
279 CreateDicEntryC( ID_LEAVE_P, "(LEAVE)", 0 );
280 CreateDicEntryC( ID_LITERAL, "LITERAL", FLAG_IMMEDIATE );
281 CreateDicEntryC( ID_LITERAL_P, "(LITERAL)", 0 );
282 CreateDicEntryC( ID_LOADSYS, "LOADSYS", 0 );
283 CreateDicEntryC( ID_LOCAL_COMPILER, "LOCAL-COMPILER", 0 );
284 CreateDicEntryC( ID_LOCAL_ENTRY, "(LOCAL.ENTRY)", 0 );
285 CreateDicEntryC( ID_LOCAL_EXIT, "(LOCAL.EXIT)", 0 );
286 CreateDicEntryC( ID_LOCAL_FETCH, "(LOCAL@)", 0 );
287 CreateDicEntryC( ID_LOCAL_FETCH_1, "(1_LOCAL@)", 0 );
288 CreateDicEntryC( ID_LOCAL_FETCH_2, "(2_LOCAL@)", 0 );
289 CreateDicEntryC( ID_LOCAL_FETCH_3, "(3_LOCAL@)", 0 );
290 CreateDicEntryC( ID_LOCAL_FETCH_4, "(4_LOCAL@)", 0 );
291 CreateDicEntryC( ID_LOCAL_FETCH_5, "(5_LOCAL@)", 0 );
292 CreateDicEntryC( ID_LOCAL_FETCH_6, "(6_LOCAL@)", 0 );
293 CreateDicEntryC( ID_LOCAL_FETCH_7, "(7_LOCAL@)", 0 );
294 CreateDicEntryC( ID_LOCAL_FETCH_8, "(8_LOCAL@)", 0 );
295 CreateDicEntryC( ID_LOCAL_STORE, "(LOCAL!)", 0 );
296 CreateDicEntryC( ID_LOCAL_STORE_1, "(1_LOCAL!)", 0 );
297 CreateDicEntryC( ID_LOCAL_STORE_2, "(2_LOCAL!)", 0 );
298 CreateDicEntryC( ID_LOCAL_STORE_3, "(3_LOCAL!)", 0 );
299 CreateDicEntryC( ID_LOCAL_STORE_4, "(4_LOCAL!)", 0 );
300 CreateDicEntryC( ID_LOCAL_STORE_5, "(5_LOCAL!)", 0 );
301 CreateDicEntryC( ID_LOCAL_STORE_6, "(6_LOCAL!)", 0 );
302 CreateDicEntryC( ID_LOCAL_STORE_7, "(7_LOCAL!)", 0 );
303 CreateDicEntryC( ID_LOCAL_STORE_8, "(8_LOCAL!)", 0 );
304 CreateDicEntryC( ID_LOCAL_PLUSSTORE, "(LOCAL+!)", 0 );
305 CreateDicEntryC( ID_LOOP_P, "(LOOP)", 0 );
306 CreateDicEntryC( ID_LSHIFT, "LSHIFT", 0 );
307 CreateDicEntryC( ID_MAX, "MAX", 0 );
308 CreateDicEntryC( ID_MIN, "MIN", 0 );
309 CreateDicEntryC( ID_MINUS, "-", 0 );
310 CreateDicEntryC( ID_NAME_TO_TOKEN, "NAME>", 0 );
311 CreateDicEntryC( ID_NAME_TO_PREVIOUS, "PREVNAME", 0 );
312 CreateDicEntryC( ID_NOOP, "NOOP", 0 );
313 CreateDeferredC( ID_NUMBERQ_P, "NUMBER?" );
314 CreateDicEntryC( ID_OR, "OR", 0 );
315 CreateDicEntryC( ID_OVER, "OVER", 0 );
316 pfDebugMessage("pfBuildDictionary: added OVER\n");
317 CreateDicEntryC( ID_PICK, "PICK", 0 );
318 CreateDicEntryC( ID_PLUS, "+", 0 );
319 CreateDicEntryC( ID_PLUSLOOP_P, "(+LOOP)", 0 );
320 CreateDicEntryC( ID_PLUS_STORE, "+!", 0 );
321 CreateDicEntryC( ID_QUIT_P, "(QUIT)", 0 );
322 CreateDeferredC( ID_QUIT_P, "QUIT" );
323 CreateDicEntryC( ID_QDO_P, "(?DO)", 0 );
324 CreateDicEntryC( ID_QDUP, "?DUP", 0 );
325 CreateDicEntryC( ID_QTERMINAL, "?TERMINAL", 0 );
326 CreateDicEntryC( ID_QTERMINAL, "KEY?", 0 );
327 CreateDicEntryC( ID_REFILL, "REFILL", 0 );
328 CreateDicEntryC( ID_RESIZE, "RESIZE", 0 );
329 CreateDicEntryC( ID_ROLL, "ROLL", 0 );
330 CreateDicEntryC( ID_ROT, "ROT", 0 );
331 CreateDicEntryC( ID_RSHIFT, "RSHIFT", 0 );
332 CreateDicEntryC( ID_R_DROP, "RDROP", 0 );
333 CreateDicEntryC( ID_R_FETCH, "R@", 0 );
334 CreateDicEntryC( ID_R_FROM, "R>", 0 );
335 CreateDicEntryC( ID_RP_FETCH, "RP@", 0 );
336 CreateDicEntryC( ID_RP_STORE, "RP!", 0 );
337 CreateDicEntryC( ID_SEMICOLON, ";", FLAG_IMMEDIATE );
338 CreateDicEntryC( ID_SP_FETCH, "SP@", 0 );
339 CreateDicEntryC( ID_SP_STORE, "SP!", 0 );
340 CreateDicEntryC( ID_STORE, "!", 0 );
341 CreateDicEntryC( ID_SAVE_FORTH_P, "(SAVE-FORTH)", 0 );
342 CreateDicEntryC( ID_SCAN, "SCAN", 0 );
343 CreateDicEntryC( ID_SKIP, "SKIP", 0 );
344 CreateDicEntryC( ID_SOURCE, "SOURCE", 0 );
345 CreateDicEntryC( ID_SOURCE_SET, "SET-SOURCE", 0 );
346 CreateDicEntryC( ID_SOURCE_ID, "SOURCE-ID", 0 );
347 CreateDicEntryC( ID_SOURCE_ID_PUSH, "PUSH-SOURCE-ID", 0 );
348 CreateDicEntryC( ID_SOURCE_ID_POP, "POP-SOURCE-ID", 0 );
08689895
HE		 349 CreateDicEntryC( ID_SOURCE_LINE_NUMBER_FETCH, "SOURCE-LINE-NUMBER@", 0 );
350 CreateDicEntryC( ID_SOURCE_LINE_NUMBER_STORE, "SOURCE-LINE-NUMBER!", 0 );
8e9db35f
PB		 351 CreateDicEntryC( ID_SWAP, "SWAP", 0 );
352 CreateDicEntryC( ID_TEST1, "TEST1", 0 );
353 CreateDicEntryC( ID_TEST2, "TEST2", 0 );
354 CreateDicEntryC( ID_TICK, "'", 0 );
355 CreateDicEntryC( ID_TIMES, "*", 0 );
356 CreateDicEntryC( ID_THROW, "THROW", 0 );
357 CreateDicEntryC( ID_TO_R, ">R", 0 );
358 CreateDicEntryC( ID_TYPE, "TYPE", 0 );
359 CreateDicEntryC( ID_VAR_BASE, "BASE", 0 );
360 CreateDicEntryC( ID_VAR_CODE_BASE, "CODE-BASE", 0 );
361 CreateDicEntryC( ID_VAR_CODE_LIMIT, "CODE-LIMIT", 0 );
362 CreateDicEntryC( ID_VAR_CONTEXT, "CONTEXT", 0 );
363 CreateDicEntryC( ID_VAR_DP, "DP", 0 );
364 CreateDicEntryC( ID_VAR_ECHO, "ECHO", 0 );
365 CreateDicEntryC( ID_VAR_HEADERS_PTR, "HEADERS-PTR", 0 );
366 CreateDicEntryC( ID_VAR_HEADERS_BASE, "HEADERS-BASE", 0 );
367 CreateDicEntryC( ID_VAR_HEADERS_LIMIT, "HEADERS-LIMIT", 0 );
368 CreateDicEntryC( ID_VAR_NUM_TIB, "#TIB", 0 );
369 CreateDicEntryC( ID_VAR_RETURN_CODE, "RETURN-CODE", 0 );
370 CreateDicEntryC( ID_VAR_TRACE_FLAGS, "TRACE-FLAGS", 0 );
371 CreateDicEntryC( ID_VAR_TRACE_LEVEL, "TRACE-LEVEL", 0 );
372 CreateDicEntryC( ID_VAR_TRACE_STACK, "TRACE-STACK", 0 );
373 CreateDicEntryC( ID_VAR_OUT, "OUT", 0 );
374 CreateDicEntryC( ID_VAR_STATE, "STATE", 0 );
375 CreateDicEntryC( ID_VAR_TO_IN, ">IN", 0 );
376 CreateDicEntryC( ID_WORD, "WORD", 0 );
377 CreateDicEntryC( ID_WORD_FETCH, "W@", 0 );
378 CreateDicEntryC( ID_WORD_STORE, "W!", 0 );
379 CreateDicEntryC( ID_XOR, "XOR", 0 );
380 CreateDicEntryC( ID_ZERO_BRANCH, "0BRANCH", 0 );
381
382 pfDebugMessage("pfBuildDictionary: FindSpecialXTs\n");
383 if( FindSpecialXTs() < 0 ) goto error;
384
385 if( CompileCustomFunctions() < 0 ) goto error; /* Call custom 'C' call builder. */
386
387#ifdef PF_DEBUG
388 DumpMemory( dic->dic_HeaderBase, 256 );
389 DumpMemory( dic->dic_CodeBase, 256 );
390#endif
391
392 pfDebugMessage("pfBuildDictionary: Finished adding dictionary entries.\n");
393 return (PForthDictionary) dic;
394
395error:
396 pfDebugMessage("pfBuildDictionary: Error adding dictionary entries.\n");
397 pfDeleteDictionary( dic );
398 return NULL;
399
400nomem:
401 return NULL;
402}
403#endif /* !PF_NO_INIT */
404
405/*
406** ( xt -- nfa 1 , x 0 , find NFA in dictionary from XT )
407** 1 for IMMEDIATE values
408*/
409cell_t ffTokenToName( ExecToken XT, const ForthString **NFAPtr )
410{
411 const ForthString *NameField;
412 cell_t Searching = TRUE;
413 cell_t Result = 0;
414 ExecToken TempXT;
415
416 NameField = (ForthString *) gVarContext;
417DBUGX(("\ffCodeToName: gVarContext = 0x%x\n", gVarContext));
418
419 do
420 {
421 TempXT = NameToToken( NameField );
422
423 if( TempXT == XT )
424 {
425DBUGX(("ffCodeToName: NFA = 0x%x\n", NameField));
426 *NFAPtr = NameField ;
427 Result = 1;
428 Searching = FALSE;
429 }
430 else
431 {
432 NameField = NameToPrevious( NameField );
433 if( NameField == NULL )
434 {
435 *NFAPtr = 0;
436 Searching = FALSE;
437 }
438 }
439 } while ( Searching);
440
441 return Result;
442}
443
444/*
445** ( $name -- $addr 0 | nfa -1 | nfa 1 , find NFA in dictionary )
446** 1 for IMMEDIATE values
447*/
448cell_t ffFindNFA( const ForthString *WordName, const ForthString **NFAPtr )
449{
450 const ForthString *WordChar;
451 uint8_t WordLen;
452 const char *NameField, *NameChar;
453 int8_t NameLen;
454 cell_t Searching = TRUE;
455 cell_t Result = 0;
456
457 WordLen = (uint8_t) ((ucell_t)*WordName & 0x1F);
458 WordChar = WordName+1;
459
460 NameField = (ForthString *) gVarContext;
461DBUG(("\nffFindNFA: WordLen = %d, WordName = %*s\n", WordLen, WordLen, WordChar ));
462DBUG(("\nffFindNFA: gVarContext = 0x%x\n", gVarContext));
463 do
464 {
465 NameLen = (uint8_t) ((ucell_t)(*NameField) & MASK_NAME_SIZE);
466 NameChar = NameField+1;
467/* DBUG((" %c\n", (*NameField & FLAG_SMUDGE) ? 'S' : 'V' )); */
468 if( ((*NameField & FLAG_SMUDGE) == 0) &&
469 (NameLen == WordLen) &&
470 ffCompareTextCaseN( NameChar, WordChar, WordLen ) ) /* FIXME - slow */
471 {
472DBUG(("ffFindNFA: found it at NFA = 0x%x\n", NameField));
473 *NFAPtr = NameField ;
474 Result = ((*NameField) & FLAG_IMMEDIATE) ? 1 : -1;
475 Searching = FALSE;
476 }
477 else
478 {
479 NameField = NameToPrevious( NameField );
480 if( NameField == NULL )
481 {
482 *NFAPtr = WordName;
483 Searching = FALSE;
484 }
485 }
486 } while ( Searching);
487DBUG(("ffFindNFA: returns 0x%x\n", Result));
488 return Result;
489}
490
491
492/***************************************************************
493** ( $name -- $name 0 | xt -1 | xt 1 )
494** 1 for IMMEDIATE values
495*/
496cell_t ffFind( const ForthString *WordName, ExecToken *pXT )
497{
498 const ForthString *NFA;
499 cell_t Result;
500
501 Result = ffFindNFA( WordName, &NFA );
502DBUG(("ffFind: %8s at 0x%x\n", WordName+1, NFA)); /* WARNING, not NUL terminated. %Q */
503 if( Result )
504 {
505 *pXT = NameToToken( NFA );
506 }
507 else
508 {
509 *pXT = (ExecToken) WordName;
510 }
511
512 return Result;
513}
514
515/****************************************************************
516** Find name when passed 'C' string.
517*/
518cell_t ffFindC( const char *WordName, ExecToken *pXT )
519{
520DBUG(("ffFindC: %s\n", WordName ));
521 CStringToForth( gScratch, WordName, sizeof(gScratch) );
522 return ffFind( gScratch, pXT );
523}
524
525
526/***********************************************************/
527/********* Compiling New Words *****************************/
528/***********************************************************/
529#define DIC_SAFETY_MARGIN (400)
530
531/*************************************************************
532** Check for dictionary overflow.
533*/
534static cell_t ffCheckDicRoom( void )
535{
536 cell_t RoomLeft;
537 RoomLeft = (char *)gCurrentDictionary->dic_HeaderLimit -
538 (char *)gCurrentDictionary->dic_HeaderPtr;
539 if( RoomLeft < DIC_SAFETY_MARGIN )
540 {
541 pfReportError("ffCheckDicRoom", PF_ERR_HEADER_ROOM);
542 return PF_ERR_HEADER_ROOM;
543 }
544
545 RoomLeft = (char *)gCurrentDictionary->dic_CodeLimit -
546 (char *)gCurrentDictionary->dic_CodePtr.Byte;
547 if( RoomLeft < DIC_SAFETY_MARGIN )
548 {
549 pfReportError("ffCheckDicRoom", PF_ERR_CODE_ROOM);
550 return PF_ERR_CODE_ROOM;
551 }
552 return 0;
553}
554
555/*************************************************************
556** Create a dictionary entry given a string name.
557*/
558void ffCreateSecondaryHeader( const ForthStringPtr FName)
559{
560 pfDebugMessage("ffCreateSecondaryHeader()\n");
561/* Check for dictionary overflow. */
562 if( ffCheckDicRoom() ) return;
563
564 pfDebugMessage("ffCreateSecondaryHeader: CheckRedefinition()\n");
565 CheckRedefinition( FName );
566/* Align CODE_HERE */
567 CODE_HERE = (cell_t *)( (((ucell_t)CODE_HERE) + UINT32_MASK) & ~UINT32_MASK);
568 CreateDicEntry( (ExecToken) ABS_TO_CODEREL(CODE_HERE), FName, FLAG_SMUDGE );
569}
570
571/*************************************************************
572** Begin compiling a secondary word.
573*/
574static void ffStringColon( const ForthStringPtr FName)
575{
576 ffCreateSecondaryHeader( FName );
577 gVarState = 1;
578}
579
580/*************************************************************
581** Read the next ExecToken from the Source and create a word.
582*/
583void ffColon( void )
584{
585 char *FName;
586
587 gDepthAtColon = DATA_STACK_DEPTH;
588
589 FName = ffWord( BLANK );
590 if( *FName > 0 )
591 {
592 ffStringColon( FName );
593 }
594}
595
596/*************************************************************
597** Check to see if name is already in dictionary.
598*/
599static cell_t CheckRedefinition( const ForthStringPtr FName )
600{
601 cell_t flag;
602 ExecToken XT;
603
604 flag = ffFind( FName, &XT);
605 if ( flag && !gVarQuiet)
606 {
607 ioType( FName+1, (cell_t) *FName );
608 MSG( " redefined.\n" ); /* FIXME - allow user to run off this warning. */
609 }
610 return flag;
611}
612
613void ffStringCreate( char *FName)
614{
615 ffCreateSecondaryHeader( FName );
616
617 CODE_COMMA( ID_CREATE_P );
618 CODE_COMMA( ID_EXIT );
619 ffFinishSecondary();
620
621}
622
623/* Read the next ExecToken from the Source and create a word. */
624void ffCreate( void )
625{
626 char *FName;
627
628 FName = ffWord( BLANK );
629 if( *FName > 0 )
630 {
631 ffStringCreate( FName );
632 }
633}
634
635void ffStringDefer( const ForthStringPtr FName, ExecToken DefaultXT )
636{
637 pfDebugMessage("ffStringDefer()\n");
638 ffCreateSecondaryHeader( FName );
639
640 CODE_COMMA( ID_DEFER_P );
641 CODE_COMMA( DefaultXT );
642
643 ffFinishSecondary();
644
645}
646#ifndef PF_NO_INIT
647/* Convert name then create deferred dictionary entry. */
648static void CreateDeferredC( ExecToken DefaultXT, const char *CName )
649{
650 char FName[40];
651 CStringToForth( FName, CName, sizeof(FName) );
652 ffStringDefer( FName, DefaultXT );
653}
654#endif
655
656/* Read the next token from the Source and create a word. */
657void ffDefer( void )
658{
659 char *FName;
660
661 FName = ffWord( BLANK );
662 if( *FName > 0 )
663 {
664 ffStringDefer( FName, ID_QUIT_P );
665 }
666}
667
668/* Unsmudge the word to make it visible. */
fb2f857a 669static void ffUnSmudge( void )
8e9db35f
PB		 670{
671 *(char*)gVarContext &= ~FLAG_SMUDGE;
672}
673
674/* Implement ; */
675ThrowCode ffSemiColon( void )
676{
677 ThrowCode exception = 0;
678 gVarState = 0;
679
680 if( (gDepthAtColon != DATA_STACK_DEPTH) &&
681 (gDepthAtColon != DEPTH_AT_COLON_INVALID) ) /* Ignore if no ':' */
682 {
683 exception = THROW_SEMICOLON;
684 }
685 else
686 {
687 ffFinishSecondary();
688 }
689 gDepthAtColon = DEPTH_AT_COLON_INVALID;
690 return exception;
691}
692
693/* Finish the definition of a Forth word. */
694void ffFinishSecondary( void )
695{
696 CODE_COMMA( ID_EXIT );
697 ffUnSmudge();
698}
699
700/**************************************************************/
701/* Used to pull a number from the dictionary to the stack */
702void ff2Literal( cell_t dHi, cell_t dLo )
703{
704 CODE_COMMA( ID_2LITERAL_P );
705 CODE_COMMA( dHi );
706 CODE_COMMA( dLo );
707}
708void ffALiteral( cell_t Num )
709{
710 CODE_COMMA( ID_ALITERAL_P );
711 CODE_COMMA( Num );
712}
713void ffLiteral( cell_t Num )
714{
715 CODE_COMMA( ID_LITERAL_P );
716 CODE_COMMA( Num );
717}
718
719#ifdef PF_SUPPORT_FP
720void ffFPLiteral( PF_FLOAT fnum )
721{
722 /* Hack for Metrowerks complier which won't compile the
723 * original expression.
724 */
725 PF_FLOAT *temp;
726 cell_t *dicPtr;
727
728/* Make sure that literal float data is float aligned. */
729 dicPtr = CODE_HERE + 1;
730 while( (((ucell_t) dicPtr++) & (sizeof(PF_FLOAT) - 1)) != 0)
731 {
732 DBUG((" comma NOOP to align FPLiteral\n"));
733 CODE_COMMA( ID_NOOP );
734 }
735 CODE_COMMA( ID_FP_FLITERAL_P );
736
737 temp = (PF_FLOAT *)CODE_HERE;
738 WRITE_FLOAT_DIC(temp,fnum); /* Write to dictionary. */
739 temp++;
740 CODE_HERE = (cell_t *) temp;
741}
742#endif /* PF_SUPPORT_FP */
743
744/**************************************************************/
fb2f857a 745static ThrowCode FindAndCompile( const char *theWord )
8e9db35f
PB		 746{
747 cell_t Flag;
748 ExecToken XT;
749 cell_t Num;
750 ThrowCode exception = 0;
751
752 Flag = ffFind( theWord, &XT);
753DBUG(("FindAndCompile: theWord = %8s, XT = 0x%x, Flag = %d\n", theWord, XT, Flag ));
754
755/* Is it a normal word ? */
756 if( Flag == -1 )
757 {
758 if( gVarState ) /* compiling? */
759 {
760 CODE_COMMA( XT );
761 }
762 else
763 {
764 exception = pfCatch( XT );
765 }
766 }
767 else if ( Flag == 1 ) /* or is it IMMEDIATE ? */
768 {
769DBUG(("FindAndCompile: IMMEDIATE, theWord = 0x%x\n", theWord ));
770 exception = pfCatch( XT );
771 }
772 else /* try to interpret it as a number. */
773 {
774/* Call deferred NUMBER? */
775 cell_t NumResult;
776
777DBUG(("FindAndCompile: not found, try number?\n" ));
778 PUSH_DATA_STACK( theWord ); /* Push text of number */
779 exception = pfCatch( gNumberQ_XT );
780 if( exception ) goto error;
781
782DBUG(("FindAndCompile: after number?\n" ));
783 NumResult = POP_DATA_STACK; /* Success? */
784 switch( NumResult )
785 {
786 case NUM_TYPE_SINGLE:
787 if( gVarState ) /* compiling? */
788 {
789 Num = POP_DATA_STACK;
790 ffLiteral( Num );
791 }
792 break;
793
794 case NUM_TYPE_DOUBLE:
795 if( gVarState ) /* compiling? */
796 {
797 Num = POP_DATA_STACK; /* get hi portion */
798 ff2Literal( Num, POP_DATA_STACK );
799 }
800 break;
801
802#ifdef PF_SUPPORT_FP
803 case NUM_TYPE_FLOAT:
804 if( gVarState ) /* compiling? */
805 {
806 ffFPLiteral( *gCurrentTask->td_FloatStackPtr++ );
807 }
808 break;
809#endif
810
811 case NUM_TYPE_BAD:
812 default:
813 ioType( theWord+1, *theWord );
814 MSG( " ? - unrecognized word!\n" );
815 exception = THROW_UNDEFINED_WORD;
816 break;
817
818 }
819 }
820error:
821 return exception;
822}
823
824/**************************************************************
825** Forth outer interpreter. Parses words from Source.
826** Executes them or compiles them based on STATE.
827*/
828ThrowCode ffInterpret( void )
829{
830 cell_t flag;
831 char *theWord;
832 ThrowCode exception = 0;
833
834/* Is there any text left in Source ? */
835 while( gCurrentTask->td_IN < (gCurrentTask->td_SourceNum) )
836 {
837
838 pfDebugMessage("ffInterpret: calling ffWord(()\n");
f7548536 839 theWord = ffLWord( BLANK );
8e9db35f
PB		 840 DBUG(("ffInterpret: theWord = 0x%x, Len = %d\n", theWord, *theWord ));
841
842 if( *theWord > 0 )
843 {
844 flag = 0;
845 if( gLocalCompiler_XT )
846 {
847 PUSH_DATA_STACK( theWord ); /* Push word. */
848 exception = pfCatch( gLocalCompiler_XT );
849 if( exception ) goto error;
850 flag = POP_DATA_STACK; /* Compiled local? */
851 }
852 if( flag == 0 )
853 {
854 exception = FindAndCompile( theWord );
855 if( exception ) goto error;
856 }
857 }
858
859 DBUG(("ffInterpret: IN=%d, SourceNum=%d\n", gCurrentTask->td_IN,
860 gCurrentTask->td_SourceNum ) );
861 }
862error:
863 return exception;
864}
865
866/**************************************************************/
867ThrowCode ffOK( void )
868{
869 cell_t exception = 0;
870/* Check for stack underflow. %Q what about overflows? */
871 if( (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr) < 0 )
872 {
873 exception = THROW_STACK_UNDERFLOW;
874 }
875#ifdef PF_SUPPORT_FP /* Check floating point stack too! */
876 else if((gCurrentTask->td_FloatStackBase - gCurrentTask->td_FloatStackPtr) < 0)
877 {
878 exception = THROW_FLOAT_STACK_UNDERFLOW;
879 }
880#endif
881 else if( gCurrentTask->td_InputStream == PF_STDIN)
882 {
883 if( !gVarState ) /* executing? */
884 {
885 if( !gVarQuiet )
886 {
887 MSG( " ok\n" );
888 if(gVarTraceStack) ffDotS();
889 }
890 else
891 {
892 EMIT_CR;
893 }
894 }
895 }
896 return exception;
897}
898
899/***************************************************************
900** Cleanup Include stack by popping and closing files.
901***************************************************************/
902void pfHandleIncludeError( void )
903{
904 FileStream *cur;
905
906 while( (cur = ffPopInputStream()) != PF_STDIN)
907 {
908 DBUG(("ffCleanIncludeStack: closing 0x%x\n", cur ));
909 sdCloseFile(cur);
910 }
911}
912
913/***************************************************************
914** Interpret input in a loop.
915***************************************************************/
916ThrowCode ffOuterInterpreterLoop( void )
917{
918 cell_t exception = 0;
919 do
920 {
921 exception = ffRefill();
922 if(exception <= 0) break;
923
924 exception = ffInterpret();
925 if( exception == 0 )
926 {
927 exception = ffOK();
928 }
929
930 } while( exception == 0 );
931 return exception;
932}
933
934/***************************************************************
935** Include then close a file
936***************************************************************/
937
938ThrowCode ffIncludeFile( FileStream *InputFile )
939{
940 ThrowCode exception;
941
942/* Push file stream. */
943 exception = ffPushInputStream( InputFile );
944 if( exception < 0 ) return exception;
945
946/* Run outer interpreter for stream. */
947 exception = ffOuterInterpreterLoop();
948 if( exception )
949 {
950 int i;
951/* Report line number and nesting level. */
952 MSG("INCLUDE error on line #"); ffDot(gCurrentTask->td_LineNumber);
953 MSG(", level = "); ffDot(gIncludeIndex );
954 EMIT_CR
955
956/* Dump line of error and show offset in line for >IN */
957 for( i=0; i<gCurrentTask->td_SourceNum; i++ )
958 {
959 char c = gCurrentTask->td_SourcePtr[i];
960 if( c == '\t' ) c = ' ';
961 EMIT(c);
962 }
963 EMIT_CR;
964 for( i=0; i<(gCurrentTask->td_IN - 1); i++ ) EMIT('^');
965 EMIT_CR;
966 }
967
968/* Pop file stream. */
969 ffPopInputStream();
970
971/* ANSI spec specifies that this should also close the file. */
972 sdCloseFile(InputFile);
973
974 return exception;
975}
976
977#endif /* !PF_NO_SHELL */
978
979/***************************************************************
980** Save current input stream on stack, use this new one.
981***************************************************************/
982Err ffPushInputStream( FileStream *InputFile )
983{
529bb4e2 984 Err Result = 0;
8e9db35f
PB		 985 IncludeFrame *inf;
986
987/* Push current input state onto special include stack. */
988 if( gIncludeIndex < MAX_INCLUDE_DEPTH )
989 {
990 inf = &gIncludeStack[gIncludeIndex++];
991 inf->inf_FileID = gCurrentTask->td_InputStream;
992 inf->inf_IN = gCurrentTask->td_IN;
993 inf->inf_LineNumber = gCurrentTask->td_LineNumber;
994 inf->inf_SourceNum = gCurrentTask->td_SourceNum;
995/* Copy TIB plus any NUL terminator into saved area. */
996 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
997 {
998 pfCopyMemory( inf->inf_SaveTIB, gCurrentTask->td_TIB, inf->inf_SourceNum+1 );
999 }
1000
1001/* Set new current input. */
1002 DBUG(( "ffPushInputStream: InputFile = 0x%x\n", InputFile ));
1003 gCurrentTask->td_InputStream = InputFile;
1004 gCurrentTask->td_LineNumber = 0;
1005 }
1006 else
1007 {
1008 ERR("ffPushInputStream: max depth exceeded.\n");
1009 return -1;
1010 }
1011
1012
1013 return Result;
1014}
1015
1016/***************************************************************
1017** Go back to reading previous stream.
1018** Just return gCurrentTask->td_InputStream upon underflow.
1019***************************************************************/
1020FileStream *ffPopInputStream( void )
1021{
1022 IncludeFrame *inf;
1023 FileStream *Result;
1024
1025DBUG(("ffPopInputStream: gIncludeIndex = %d\n", gIncludeIndex));
1026 Result = gCurrentTask->td_InputStream;
1027
1028/* Restore input state. */
1029 if( gIncludeIndex > 0 )
1030 {
1031 inf = &gIncludeStack[--gIncludeIndex];
1032 gCurrentTask->td_InputStream = inf->inf_FileID;
1033 DBUG(("ffPopInputStream: stream = 0x%x\n", gCurrentTask->td_InputStream ));
1034 gCurrentTask->td_IN = inf->inf_IN;
1035 gCurrentTask->td_LineNumber = inf->inf_LineNumber;
1036 gCurrentTask->td_SourceNum = inf->inf_SourceNum;
1037/* Copy TIB plus any NUL terminator into saved area. */
1038 if( (inf->inf_SourceNum > 0) && (inf->inf_SourceNum < (TIB_SIZE-1)) )
1039 {
1040 pfCopyMemory( gCurrentTask->td_TIB, inf->inf_SaveTIB, inf->inf_SourceNum+1 );
1041 }
1042
1043 }
1044DBUG(("ffPopInputStream: return = 0x%x\n", Result ));
1045
1046 return Result;
1047}
1048
1049/***************************************************************
1050** Convert file pointer to value consistent with SOURCE-ID.
1051***************************************************************/
1052cell_t ffConvertStreamToSourceID( FileStream *Stream )
1053{
1054 cell_t Result;
1055 if(Stream == PF_STDIN)
1056 {
1057 Result = 0;
1058 }
1059 else if(Stream == NULL)
1060 {
1061 Result = -1;
1062 }
1063 else
1064 {
1065 Result = (cell_t) Stream;
1066 }
1067 return Result;
1068}
1069
1070/***************************************************************
1071** Convert file pointer to value consistent with SOURCE-ID.
1072***************************************************************/
1073FileStream * ffConvertSourceIDToStream( cell_t id )
1074{
1075 FileStream *stream;
1076
1077 if( id == 0 )
1078 {
1079 stream = PF_STDIN;
1080 }
1081 else if( id == -1 )
1082 {
1083 stream = NULL;
1084 }
1085 else
1086 {
1087 stream = (FileStream *) id;
1088 }
1089 return stream;
1090}
1091
1092/**************************************************************
1093** Receive line from input stream.
1094** Return length, or -1 for EOF.
1095*/
1096#define BACKSPACE (8)
1097static cell_t readLineFromStream( char *buffer, cell_t maxChars, FileStream *stream )
1098{
1099 int c;
1100 int len;
1101 char *p;
1102 static int lastChar = 0;
1103 int done = 0;
1104
1105DBUGX(("readLineFromStream(0x%x, 0x%x, 0x%x)\n", buffer, len, stream ));
1106 p = buffer;
1107 len = 0;
1108 while( (len < maxChars) && !done )
1109 {
1110 c = sdInputChar(stream);
1111 switch(c)
1112 {
1113 case EOF:
1114 DBUG(("EOF\n"));
1115 done = 1;
1116 if( len <= 0 ) len = -1;
1117 break;
1118
1119 case '\n':
1120 DBUGX(("EOL=\\n\n"));
1121 if( lastChar != '\r' ) done = 1;
1122 break;
1123
1124 case '\r':
1125 DBUGX(("EOL=\\r\n"));
1126 done = 1;
1127 break;
1128
1129 default:
1130 *p++ = (char) c;
1131 len++;
1132 break;
1133 }
1134 lastChar = c;
1135 }
1136
1137/* NUL terminate line to simplify printing when debugging. */
1138 if( (len >= 0) && (len < maxChars) ) p[len] = '\0';
1139
1140 return len;
1141}
1142
1143/**************************************************************
1144** ( -- , fill Source from current stream )
1145** Return 1 if successful, 0 for EOF, or a negative error.
1146*/
1147cell_t ffRefill( void )
1148{
1149 cell_t Num;
1150 cell_t Result = 1;
1151
1152/* reset >IN for parser */
1153 gCurrentTask->td_IN = 0;
1154
1155/* get line from current stream */
1156 if( gCurrentTask->td_InputStream == PF_STDIN )
1157 {
1158 /* ACCEPT is deferred so we call it through the dictionary. */
1159 PUSH_DATA_STACK( gCurrentTask->td_SourcePtr );
1160 PUSH_DATA_STACK( TIB_SIZE );
2d8c3ec4
PB		 1161 ThrowCode throwCode = pfCatch( gAcceptP_XT );
1162 if (throwCode) {
1163 Result = throwCode;
1164 goto error;
1165 }
8e9db35f
PB		 1166 Num = POP_DATA_STACK;
1167 if( Num < 0 )
1168 {
1169 Result = Num;
1170 goto error;
1171 }
1172 }
1173 else
1174 {
1175 Num = readLineFromStream( gCurrentTask->td_SourcePtr, TIB_SIZE,
1176 gCurrentTask->td_InputStream );
1177 if( Num == EOF )
1178 {
1179 Result = 0;
1180 Num = 0;
1181 }
1182 }
1183
1184 gCurrentTask->td_SourceNum = Num;
1185 gCurrentTask->td_LineNumber++; /* Bump for include. */
1186
1187/* echo input if requested */
1188 if( gVarEcho && ( Num > 0))
1189 {
1190 ioType( gCurrentTask->td_SourcePtr, gCurrentTask->td_SourceNum );
1191 EMIT_CR;
1192 }
1193
1194error:
1195 return Result;
1196}
Fork of 'github/philburk/pforth', a portable ANS-like Forth written in ANSI C.