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