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1eee94d3 GM |
1 | /* do not edit automatically generated by mc from PushBackInput. */ |
2 | /* PushBackInput.mod provides a method for pushing back and consuming input. | |
3 | ||
83ffe9cd | 4 | Copyright (C) 2001-2023 Free Software Foundation, Inc. |
1eee94d3 GM |
5 | Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>. |
6 | ||
7 | This file is part of GNU Modula-2. | |
8 | ||
9 | GNU Modula-2 is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GNU Modula-2 is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | General Public License for more details. | |
18 | ||
19 | Under Section 7 of GPL version 3, you are granted additional | |
20 | permissions described in the GCC Runtime Library Exception, version | |
21 | 3.1, as published by the Free Software Foundation. | |
22 | ||
23 | You should have received a copy of the GNU General Public License and | |
24 | a copy of the GCC Runtime Library Exception along with this program; | |
25 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
26 | <http://www.gnu.org/licenses/>. */ | |
27 | ||
28 | # if !defined (PROC_D) | |
29 | # define PROC_D | |
30 | typedef void (*PROC_t) (void); | |
31 | typedef struct { PROC_t proc; } PROC; | |
32 | # endif | |
33 | ||
34 | # if !defined (FALSE) | |
35 | # define FALSE (1==0) | |
36 | # endif | |
37 | ||
38 | #include <stddef.h> | |
39 | #include <string.h> | |
40 | #include <limits.h> | |
41 | #if defined(__cplusplus) | |
42 | # undef NULL | |
43 | # define NULL 0 | |
44 | #endif | |
45 | #define _PushBackInput_H | |
46 | #define _PushBackInput_C | |
47 | ||
48 | # include "GFIO.h" | |
49 | # include "GDynamicStrings.h" | |
50 | # include "GASCII.h" | |
51 | # include "GDebug.h" | |
52 | # include "GStrLib.h" | |
53 | # include "GNumberIO.h" | |
54 | # include "GStrIO.h" | |
55 | # include "GStdIO.h" | |
56 | # include "Glibc.h" | |
57 | ||
58 | # define MaxPushBackStack 8192 | |
59 | # define MaxFileName 4096 | |
60 | typedef struct PushBackInput__T2_a PushBackInput__T2; | |
61 | ||
62 | typedef struct PushBackInput__T3_a PushBackInput__T3; | |
63 | ||
64 | struct PushBackInput__T2_a { char array[MaxFileName+1]; }; | |
65 | struct PushBackInput__T3_a { char array[MaxPushBackStack+1]; }; | |
66 | static PushBackInput__T2 FileName; | |
67 | static PushBackInput__T3 CharStack; | |
68 | static unsigned int ExitStatus; | |
69 | static unsigned int Column; | |
70 | static unsigned int StackPtr; | |
71 | static unsigned int LineNo; | |
72 | static unsigned int Debugging; | |
73 | ||
74 | /* | |
75 | Open - opens a file for reading. | |
76 | */ | |
77 | ||
78 | extern "C" FIO_File PushBackInput_Open (const char *a_, unsigned int _a_high); | |
79 | ||
80 | /* | |
81 | GetCh - gets a character from either the push back stack or | |
82 | from file, f. | |
83 | */ | |
84 | ||
85 | extern "C" char PushBackInput_GetCh (FIO_File f); | |
86 | ||
87 | /* | |
88 | PutCh - pushes a character onto the push back stack, it also | |
89 | returns the character which has been pushed. | |
90 | */ | |
91 | ||
92 | extern "C" char PushBackInput_PutCh (char ch); | |
93 | ||
94 | /* | |
95 | PutString - pushes a string onto the push back stack. | |
96 | */ | |
97 | ||
98 | extern "C" void PushBackInput_PutString (const char *a_, unsigned int _a_high); | |
99 | ||
100 | /* | |
101 | PutStr - pushes a dynamic string onto the push back stack. | |
102 | The string, s, is not deallocated. | |
103 | */ | |
104 | ||
105 | extern "C" void PushBackInput_PutStr (DynamicStrings_String s); | |
106 | ||
107 | /* | |
108 | Error - emits an error message with the appropriate file, line combination. | |
109 | */ | |
110 | ||
111 | extern "C" void PushBackInput_Error (const char *a_, unsigned int _a_high); | |
112 | ||
113 | /* | |
114 | WarnError - emits an error message with the appropriate file, line combination. | |
115 | It does not terminate but when the program finishes an exit status of | |
116 | 1 will be issued. | |
117 | */ | |
118 | ||
119 | extern "C" void PushBackInput_WarnError (const char *a_, unsigned int _a_high); | |
120 | ||
121 | /* | |
122 | WarnString - emits an error message with the appropriate file, line combination. | |
123 | It does not terminate but when the program finishes an exit status of | |
124 | 1 will be issued. | |
125 | */ | |
126 | ||
127 | extern "C" void PushBackInput_WarnString (DynamicStrings_String s); | |
128 | ||
129 | /* | |
130 | Close - closes the opened file. | |
131 | */ | |
132 | ||
133 | extern "C" void PushBackInput_Close (FIO_File f); | |
134 | ||
135 | /* | |
136 | GetExitStatus - returns the exit status which will be 1 if any warnings were issued. | |
137 | */ | |
138 | ||
139 | extern "C" unsigned int PushBackInput_GetExitStatus (void); | |
140 | ||
141 | /* | |
142 | SetDebug - sets the debug flag on or off. | |
143 | */ | |
144 | ||
145 | extern "C" void PushBackInput_SetDebug (unsigned int d); | |
146 | ||
147 | /* | |
148 | GetColumnPosition - returns the column position of the current character. | |
149 | */ | |
150 | ||
151 | extern "C" unsigned int PushBackInput_GetColumnPosition (void); | |
152 | ||
153 | /* | |
154 | GetCurrentLine - returns the current line number. | |
155 | */ | |
156 | ||
157 | extern "C" unsigned int PushBackInput_GetCurrentLine (void); | |
158 | ||
159 | /* | |
160 | ErrChar - writes a char, ch, to stderr. | |
161 | */ | |
162 | ||
163 | static void ErrChar (char ch); | |
164 | ||
165 | /* | |
166 | Init - initialize global variables. | |
167 | */ | |
168 | ||
169 | static void Init (void); | |
170 | ||
171 | ||
172 | /* | |
173 | ErrChar - writes a char, ch, to stderr. | |
174 | */ | |
175 | ||
176 | static void ErrChar (char ch) | |
177 | { | |
178 | FIO_WriteChar (FIO_StdErr, ch); | |
179 | } | |
180 | ||
181 | ||
182 | /* | |
183 | Init - initialize global variables. | |
184 | */ | |
185 | ||
186 | static void Init (void) | |
187 | { | |
188 | ExitStatus = 0; | |
189 | StackPtr = 0; | |
190 | LineNo = 1; | |
191 | Column = 0; | |
192 | } | |
193 | ||
194 | ||
195 | /* | |
196 | Open - opens a file for reading. | |
197 | */ | |
198 | ||
199 | extern "C" FIO_File PushBackInput_Open (const char *a_, unsigned int _a_high) | |
200 | { | |
201 | char a[_a_high+1]; | |
202 | ||
203 | /* make a local copy of each unbounded array. */ | |
204 | memcpy (a, a_, _a_high+1); | |
205 | ||
206 | Init (); | |
207 | StrLib_StrCopy ((const char *) a, _a_high, (char *) &FileName.array[0], MaxFileName); | |
208 | return FIO_OpenToRead ((const char *) a, _a_high); | |
209 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
210 | __builtin_unreachable (); | |
211 | } | |
212 | ||
213 | ||
214 | /* | |
215 | GetCh - gets a character from either the push back stack or | |
216 | from file, f. | |
217 | */ | |
218 | ||
219 | extern "C" char PushBackInput_GetCh (FIO_File f) | |
220 | { | |
221 | char ch; | |
222 | ||
223 | if (StackPtr > 0) | |
224 | { | |
225 | StackPtr -= 1; | |
226 | if (Debugging) | |
227 | { | |
228 | StdIO_Write (CharStack.array[StackPtr]); | |
229 | } | |
230 | return CharStack.array[StackPtr]; | |
231 | } | |
232 | else | |
233 | { | |
234 | if ((FIO_EOF (f)) || (! (FIO_IsNoError (f)))) | |
235 | { | |
236 | ch = ASCII_nul; | |
237 | } | |
238 | else | |
239 | { | |
240 | do { | |
241 | ch = FIO_ReadChar (f); | |
242 | } while (! (((ch != ASCII_cr) || (FIO_EOF (f))) || (! (FIO_IsNoError (f))))); | |
243 | if (ch == ASCII_lf) | |
244 | { | |
245 | Column = 0; | |
246 | LineNo += 1; | |
247 | } | |
248 | else | |
249 | { | |
250 | Column += 1; | |
251 | } | |
252 | } | |
253 | if (Debugging) | |
254 | { | |
255 | StdIO_Write (ch); | |
256 | } | |
257 | return ch; | |
258 | } | |
259 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
260 | __builtin_unreachable (); | |
261 | } | |
262 | ||
263 | ||
264 | /* | |
265 | PutCh - pushes a character onto the push back stack, it also | |
266 | returns the character which has been pushed. | |
267 | */ | |
268 | ||
269 | extern "C" char PushBackInput_PutCh (char ch) | |
270 | { | |
271 | if (StackPtr < MaxPushBackStack) | |
272 | { | |
273 | CharStack.array[StackPtr] = ch; | |
274 | StackPtr += 1; | |
275 | } | |
276 | else | |
277 | { | |
278 | Debug_Halt ((const char *) "max push back stack exceeded, increase MaxPushBackStack", 55, 150, (const char *) "../../gcc-git-devel-modula2/gcc/m2/gm2-libs/PushBackInput.mod", 61); | |
279 | } | |
280 | return ch; | |
281 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
282 | __builtin_unreachable (); | |
283 | } | |
284 | ||
285 | ||
286 | /* | |
287 | PutString - pushes a string onto the push back stack. | |
288 | */ | |
289 | ||
290 | extern "C" void PushBackInput_PutString (const char *a_, unsigned int _a_high) | |
291 | { | |
292 | unsigned int l; | |
293 | char a[_a_high+1]; | |
294 | ||
295 | /* make a local copy of each unbounded array. */ | |
296 | memcpy (a, a_, _a_high+1); | |
297 | ||
298 | l = StrLib_StrLen ((const char *) a, _a_high); | |
299 | while (l > 0) | |
300 | { | |
301 | l -= 1; | |
302 | if ((PushBackInput_PutCh (a[l])) != a[l]) | |
303 | { | |
304 | Debug_Halt ((const char *) "assert failed", 13, 132, (const char *) "../../gcc-git-devel-modula2/gcc/m2/gm2-libs/PushBackInput.mod", 61); | |
305 | } | |
306 | } | |
307 | } | |
308 | ||
309 | ||
310 | /* | |
311 | PutStr - pushes a dynamic string onto the push back stack. | |
312 | The string, s, is not deallocated. | |
313 | */ | |
314 | ||
315 | extern "C" void PushBackInput_PutStr (DynamicStrings_String s) | |
316 | { | |
317 | unsigned int i; | |
318 | ||
319 | i = DynamicStrings_Length (s); | |
320 | while (i > 0) | |
321 | { | |
322 | i -= 1; | |
323 | if ((PushBackInput_PutCh (DynamicStrings_char (s, static_cast<int> (i)))) != (DynamicStrings_char (s, static_cast<int> (i)))) | |
324 | { | |
325 | Debug_Halt ((const char *) "assert failed", 13, 113, (const char *) "../../gcc-git-devel-modula2/gcc/m2/gm2-libs/PushBackInput.mod", 61); | |
326 | } | |
327 | } | |
328 | } | |
329 | ||
330 | ||
331 | /* | |
332 | Error - emits an error message with the appropriate file, line combination. | |
333 | */ | |
334 | ||
335 | extern "C" void PushBackInput_Error (const char *a_, unsigned int _a_high) | |
336 | { | |
337 | char a[_a_high+1]; | |
338 | ||
339 | /* make a local copy of each unbounded array. */ | |
340 | memcpy (a, a_, _a_high+1); | |
341 | ||
342 | StdIO_PushOutput ((StdIO_ProcWrite) {(StdIO_ProcWrite_t) ErrChar}); | |
343 | StrIO_WriteString ((const char *) &FileName.array[0], MaxFileName); | |
344 | StdIO_Write (':'); | |
345 | NumberIO_WriteCard (LineNo, 0); | |
346 | StdIO_Write (':'); | |
347 | StrIO_WriteString ((const char *) a, _a_high); | |
348 | StrIO_WriteLn (); | |
349 | StdIO_PopOutput (); | |
350 | FIO_Close (FIO_StdErr); | |
351 | libc_exit (1); | |
352 | } | |
353 | ||
354 | ||
355 | /* | |
356 | WarnError - emits an error message with the appropriate file, line combination. | |
357 | It does not terminate but when the program finishes an exit status of | |
358 | 1 will be issued. | |
359 | */ | |
360 | ||
361 | extern "C" void PushBackInput_WarnError (const char *a_, unsigned int _a_high) | |
362 | { | |
363 | char a[_a_high+1]; | |
364 | ||
365 | /* make a local copy of each unbounded array. */ | |
366 | memcpy (a, a_, _a_high+1); | |
367 | ||
368 | StdIO_PushOutput ((StdIO_ProcWrite) {(StdIO_ProcWrite_t) ErrChar}); | |
369 | StrIO_WriteString ((const char *) &FileName.array[0], MaxFileName); | |
370 | StdIO_Write (':'); | |
371 | NumberIO_WriteCard (LineNo, 0); | |
372 | StdIO_Write (':'); | |
373 | StrIO_WriteString ((const char *) a, _a_high); | |
374 | StrIO_WriteLn (); | |
375 | StdIO_PopOutput (); | |
376 | ExitStatus = 1; | |
377 | } | |
378 | ||
379 | ||
380 | /* | |
381 | WarnString - emits an error message with the appropriate file, line combination. | |
382 | It does not terminate but when the program finishes an exit status of | |
383 | 1 will be issued. | |
384 | */ | |
385 | ||
386 | extern "C" void PushBackInput_WarnString (DynamicStrings_String s) | |
387 | { | |
388 | typedef char *WarnString__T1; | |
389 | ||
390 | WarnString__T1 p; | |
391 | ||
392 | p = static_cast<WarnString__T1> (DynamicStrings_string (s)); | |
393 | StrIO_WriteString ((const char *) &FileName.array[0], MaxFileName); | |
394 | StdIO_Write (':'); | |
395 | NumberIO_WriteCard (LineNo, 0); | |
396 | StdIO_Write (':'); | |
397 | do { | |
398 | if (p != NULL) | |
399 | { | |
400 | if ((*p) == ASCII_lf) | |
401 | { | |
402 | StrIO_WriteLn (); | |
403 | StrIO_WriteString ((const char *) &FileName.array[0], MaxFileName); | |
404 | StdIO_Write (':'); | |
405 | NumberIO_WriteCard (LineNo, 0); | |
406 | StdIO_Write (':'); | |
407 | } | |
408 | else | |
409 | { | |
410 | StdIO_Write ((*p)); | |
411 | } | |
412 | p += 1; | |
413 | } | |
414 | } while (! ((p == NULL) || ((*p) == ASCII_nul))); | |
415 | ExitStatus = 1; | |
416 | } | |
417 | ||
418 | ||
419 | /* | |
420 | Close - closes the opened file. | |
421 | */ | |
422 | ||
423 | extern "C" void PushBackInput_Close (FIO_File f) | |
424 | { | |
425 | FIO_Close (f); | |
426 | } | |
427 | ||
428 | ||
429 | /* | |
430 | GetExitStatus - returns the exit status which will be 1 if any warnings were issued. | |
431 | */ | |
432 | ||
433 | extern "C" unsigned int PushBackInput_GetExitStatus (void) | |
434 | { | |
435 | return ExitStatus; | |
436 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
437 | __builtin_unreachable (); | |
438 | } | |
439 | ||
440 | ||
441 | /* | |
442 | SetDebug - sets the debug flag on or off. | |
443 | */ | |
444 | ||
445 | extern "C" void PushBackInput_SetDebug (unsigned int d) | |
446 | { | |
447 | Debugging = d; | |
448 | } | |
449 | ||
450 | ||
451 | /* | |
452 | GetColumnPosition - returns the column position of the current character. | |
453 | */ | |
454 | ||
455 | extern "C" unsigned int PushBackInput_GetColumnPosition (void) | |
456 | { | |
457 | if (StackPtr > Column) | |
458 | { | |
459 | return 0; | |
460 | } | |
461 | else | |
462 | { | |
463 | return Column-StackPtr; | |
464 | } | |
465 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
466 | __builtin_unreachable (); | |
467 | } | |
468 | ||
469 | ||
470 | /* | |
471 | GetCurrentLine - returns the current line number. | |
472 | */ | |
473 | ||
474 | extern "C" unsigned int PushBackInput_GetCurrentLine (void) | |
475 | { | |
476 | return LineNo; | |
477 | /* static analysis guarentees a RETURN statement will be used before here. */ | |
478 | __builtin_unreachable (); | |
479 | } | |
480 | ||
481 | extern "C" void _M2_PushBackInput_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[]) | |
482 | { | |
483 | PushBackInput_SetDebug (FALSE); | |
484 | Init (); | |
485 | } | |
486 | ||
487 | extern "C" void _M2_PushBackInput_finish (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[]) | |
488 | { | |
489 | } |