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03b93bdc DT |
1 | /* |
2 | ** tuiSource.c | |
3 | ** This module contains functions for displaying source in the source window | |
4 | */ | |
5 | ||
6 | #include "defs.h" | |
7 | #include <ctype.h> | |
8 | #include "symtab.h" | |
9 | #include "frame.h" | |
10 | #include "breakpoint.h" | |
11 | ||
12 | #include "tui.h" | |
13 | #include "tuiData.h" | |
14 | #include "tuiStack.h" | |
15 | #include "tuiSourceWin.h" | |
16 | #include "tuiSource.h" | |
17 | ||
18 | ||
19 | /***************************************** | |
20 | ** EXTERNAL FUNCTION DECLS ** | |
21 | ******************************************/ | |
22 | ||
23 | extern int open_source_file PARAMS ((struct symtab *)); | |
24 | extern void find_source_lines PARAMS ((struct symtab *, int)); | |
25 | ||
26 | /***************************************** | |
27 | ** EXTERNAL DATA DECLS ** | |
28 | ******************************************/ | |
29 | extern int current_source_line; | |
30 | extern struct symtab *current_source_symtab; | |
31 | ||
32 | ||
33 | /***************************************** | |
34 | ** STATIC LOCAL FUNCTIONS FORWARD DECLS ** | |
35 | ******************************************/ | |
36 | ||
37 | static struct breakpoint *_hasBreak PARAMS ((char *, int)); | |
38 | ||
39 | ||
40 | /***************************************** | |
41 | ** STATIC LOCAL DATA ** | |
42 | ******************************************/ | |
43 | ||
44 | ||
45 | /***************************************** | |
46 | ** PUBLIC FUNCTIONS ** | |
47 | ******************************************/ | |
48 | ||
49 | /********************************* | |
50 | ** SOURCE/DISASSEM FUNCTIONS ** | |
51 | *********************************/ | |
52 | ||
53 | /* | |
54 | ** tuiSetSourceContent(). | |
55 | ** Function to display source in the source window. | |
56 | */ | |
57 | TuiStatus | |
58 | #ifdef __STDC__ | |
59 | tuiSetSourceContent ( | |
60 | struct symtab *s, | |
61 | int lineNo, | |
62 | int noerror) | |
63 | #else | |
64 | tuiSetSourceContent (s, lineNo, noerror) | |
65 | struct symtab *s; | |
66 | int lineNo; | |
67 | int noerror; | |
68 | #endif | |
69 | { | |
70 | TuiStatus ret = TUI_FAILURE; | |
71 | ||
72 | if (s != (struct symtab *) NULL && s->filename != (char *) NULL) | |
73 | { | |
74 | register FILE *stream; | |
75 | register int i, desc, c, lineWidth, nlines; | |
76 | register char *srcLine; | |
77 | ||
78 | if ((ret = tuiAllocSourceBuffer (srcWin)) == TUI_SUCCESS) | |
79 | { | |
80 | lineWidth = srcWin->generic.width - 1; | |
81 | /* | |
82 | ** Take hilite (window border) into account, when calculating | |
83 | ** the number of lines | |
84 | */ | |
85 | nlines = (lineNo + (srcWin->generic.height - 2)) - lineNo; | |
86 | desc = open_source_file (s); | |
87 | if (desc < 0) | |
88 | { | |
89 | if (!noerror) | |
90 | { | |
91 | char *name = alloca (strlen (s->filename) + 100); | |
92 | sprintf (name, "%s:%d", s->filename, lineNo); | |
93 | print_sys_errmsg (name, errno); | |
94 | } | |
95 | ret = TUI_FAILURE; | |
96 | } | |
97 | else | |
98 | { | |
99 | if (s->line_charpos == 0) | |
100 | find_source_lines (s, desc); | |
101 | ||
102 | if (lineNo < 1 || lineNo > s->nlines) | |
103 | { | |
104 | close (desc); | |
105 | printf_unfiltered ( | |
106 | "Line number %d out of range; %s has %d lines.\n", | |
107 | lineNo, s->filename, s->nlines); | |
108 | } | |
109 | else if (lseek (desc, s->line_charpos[lineNo - 1], 0) < 0) | |
110 | { | |
111 | close (desc); | |
112 | perror_with_name (s->filename); | |
113 | } | |
114 | else | |
115 | { | |
116 | register int offset, curLineNo, curLine, curLen, threshold; | |
117 | TuiGenWinInfoPtr locator = locatorWinInfoPtr (); | |
118 | /* | |
119 | ** Determine the threshold for the length of the line | |
120 | ** and the offset to start the display | |
121 | */ | |
122 | offset = srcWin->detail.sourceInfo.horizontalOffset; | |
123 | threshold = (lineWidth - 1) + offset; | |
124 | stream = fdopen (desc, FOPEN_RT); | |
125 | clearerr (stream); | |
126 | curLine = 0; | |
127 | curLineNo = | |
128 | srcWin->detail.sourceInfo.startLineOrAddr.lineNo = lineNo; | |
129 | if (offset > 0) | |
130 | srcLine = (char *) xmalloc ( | |
131 | (threshold + 1) * sizeof (char)); | |
132 | while (curLine < nlines) | |
133 | { | |
134 | TuiWinElementPtr element = (TuiWinElementPtr) | |
135 | srcWin->generic.content[curLine]; | |
136 | struct breakpoint *bp; | |
137 | ||
138 | /* get the first character in the line */ | |
139 | c = fgetc (stream); | |
140 | ||
141 | if (offset == 0) | |
142 | srcLine = ((TuiWinElementPtr) | |
143 | srcWin->generic.content[ | |
144 | curLine])->whichElement.source.line; | |
145 | /* Init the line with the line number */ | |
146 | sprintf (srcLine, "%-6d", curLineNo); | |
147 | curLen = strlen (srcLine); | |
148 | i = curLen - | |
149 | ((curLen / tuiDefaultTabLen ()) * tuiDefaultTabLen ()); | |
150 | while (i < tuiDefaultTabLen ()) | |
151 | { | |
152 | srcLine[curLen] = ' '; | |
153 | i++; | |
154 | curLen++; | |
155 | } | |
156 | srcLine[curLen] = (char) 0; | |
157 | ||
158 | /* | |
159 | ** Set whether element is the execution point and | |
160 | ** whether there is a break point on it. | |
161 | */ | |
162 | element->whichElement.source.lineOrAddr.lineNo = | |
163 | curLineNo; | |
164 | element->whichElement.source.isExecPoint = | |
165 | (strcmp (((TuiWinElementPtr) | |
166 | locator->content[0])->whichElement.locator.fileName, | |
167 | s->filename) == 0 | |
168 | && curLineNo == ((TuiWinElementPtr) | |
169 | locator->content[0])->whichElement.locator.lineNo); | |
170 | bp = _hasBreak (s->filename, curLineNo); | |
171 | element->whichElement.source.hasBreak = | |
172 | (bp != (struct breakpoint *) NULL && | |
173 | (!element->whichElement.source.isExecPoint || | |
174 | (bp->disposition != del || bp->hit_count <= 0))); | |
175 | if (c != EOF) | |
176 | { | |
177 | i = strlen (srcLine) - 1; | |
178 | do | |
179 | { | |
180 | if ((c != '\n') && | |
181 | (c != '\r') && (++i < threshold)) | |
182 | { | |
183 | if (c < 040 && c != '\t') | |
184 | { | |
185 | srcLine[i++] = '^'; | |
186 | srcLine[i] = c + 0100; | |
187 | } | |
188 | else if (c == 0177) | |
189 | { | |
190 | srcLine[i++] = '^'; | |
191 | srcLine[i] = '?'; | |
192 | } | |
193 | else | |
194 | { /* | |
195 | ** Store the charcter in the line | |
196 | ** buffer. If it is a tab, then | |
197 | ** translate to the correct number of | |
198 | ** chars so we don't overwrite our | |
199 | ** buffer. | |
200 | */ | |
201 | if (c == '\t') | |
202 | { | |
203 | int j, maxTabLen = tuiDefaultTabLen (); | |
204 | ||
205 | for (j = i - ( | |
206 | (i / maxTabLen) * maxTabLen); | |
207 | ((j < maxTabLen) && | |
208 | i < threshold); | |
209 | i++, j++) | |
210 | srcLine[i] = ' '; | |
211 | i--; | |
212 | } | |
213 | else | |
214 | srcLine[i] = c; | |
215 | } | |
216 | srcLine[i + 1] = 0; | |
217 | } | |
218 | else | |
219 | { /* | |
220 | ** if we have not reached EOL, then eat | |
221 | ** chars until we do | |
222 | */ | |
223 | while (c != EOF && c != '\n' && c != '\r') | |
224 | c = fgetc (stream); | |
225 | } | |
226 | } | |
227 | while (c != EOF && c != '\n' && c != '\r' && | |
228 | i < threshold && (c = fgetc (stream))); | |
229 | } | |
230 | /* Now copy the line taking the offset into account */ | |
231 | if (strlen (srcLine) > offset) | |
232 | strcpy (((TuiWinElementPtr) srcWin->generic.content[ | |
233 | curLine])->whichElement.source.line, | |
234 | &srcLine[offset]); | |
235 | else | |
236 | ((TuiWinElementPtr) | |
237 | srcWin->generic.content[ | |
238 | curLine])->whichElement.source.line[0] = (char) 0; | |
239 | curLine++; | |
240 | curLineNo++; | |
241 | } | |
242 | if (offset > 0) | |
243 | tuiFree (srcLine); | |
244 | fclose (stream); | |
245 | srcWin->generic.contentSize = nlines; | |
246 | ret = TUI_SUCCESS; | |
247 | } | |
248 | } | |
249 | } | |
250 | } | |
251 | return ret; | |
252 | } /* tuiSetSourceContent */ | |
253 | ||
254 | ||
255 | /* elz: this function sets the contents of the source window to empty | |
256 | except for a line in the middle with a warning message about the | |
257 | source not being available. This function is called by | |
258 | tuiEraseSourceContents, which in turn is invoked when the source files | |
259 | cannot be accessed*/ | |
260 | ||
261 | void | |
262 | #ifdef __STDC__ | |
263 | tuiSetSourceContentNil ( | |
264 | TuiWinInfoPtr winInfo, | |
265 | char *warning_string) | |
266 | #else | |
267 | tuiSetSourceContentNil (winInfo, warning_string) | |
268 | TuiWinInfoPtr winInfo; | |
269 | char *warning_string; | |
270 | #endif | |
271 | { | |
272 | int lineWidth; | |
273 | int nLines; | |
274 | int curr_line = 0; | |
275 | ||
276 | lineWidth = winInfo->generic.width - 1; | |
277 | nLines = winInfo->generic.height - 2; | |
278 | ||
279 | /* set to empty each line in the window, except for the one | |
280 | which contains the message*/ | |
281 | while (curr_line < winInfo->generic.contentSize) | |
282 | { | |
283 | /* set the information related to each displayed line | |
284 | to null: i.e. the line number is 0, there is no bp, | |
285 | it is not where the program is stopped */ | |
286 | ||
287 | TuiWinElementPtr element = | |
288 | (TuiWinElementPtr) winInfo->generic.content[curr_line]; | |
289 | element->whichElement.source.lineOrAddr.lineNo = 0; | |
290 | element->whichElement.source.isExecPoint = FALSE; | |
291 | element->whichElement.source.hasBreak = FALSE; | |
292 | ||
293 | /* set the contents of the line to blank*/ | |
294 | element->whichElement.source.line[0] = (char) 0; | |
295 | ||
296 | /* if the current line is in the middle of the screen, then we want to | |
297 | display the 'no source available' message in it. | |
298 | Note: the 'weird' arithmetic with the line width and height comes from | |
299 | the function tuiEraseSourceContent. We need to keep the screen and the | |
300 | window's actual contents in synch */ | |
301 | ||
302 | if (curr_line == (nLines / 2 + 1)) | |
303 | { | |
304 | int i; | |
305 | int xpos; | |
306 | int warning_length = strlen (warning_string); | |
307 | char *srcLine; | |
308 | ||
309 | srcLine = element->whichElement.source.line; | |
310 | ||
311 | if (warning_length >= ((lineWidth - 1) / 2)) | |
312 | xpos = 1; | |
313 | else | |
314 | xpos = (lineWidth - 1) / 2 - warning_length; | |
315 | ||
316 | for (i = 0; i < xpos; i++) | |
317 | srcLine[i] = ' '; | |
318 | ||
319 | sprintf (srcLine + i, "%s", warning_string); | |
320 | ||
321 | for (i = xpos + warning_length; i < lineWidth; i++) | |
322 | srcLine[i] = ' '; | |
323 | ||
324 | srcLine[i] = '\n'; | |
325 | ||
326 | } /* end if */ | |
327 | ||
328 | curr_line++; | |
329 | ||
330 | } /* end while*/ | |
331 | ||
332 | } /*tuiSetSourceContentNil*/ | |
333 | ||
334 | ||
335 | ||
336 | ||
337 | /* | |
338 | ** tuiShowSource(). | |
339 | ** Function to display source in the source window. This function | |
340 | ** initializes the horizontal scroll to 0. | |
341 | */ | |
342 | void | |
343 | #ifdef __STDC__ | |
344 | tuiShowSource ( | |
345 | struct symtab *s, | |
346 | Opaque line, | |
347 | int noerror) | |
348 | #else | |
349 | tuiShowSource (s, line, noerror) | |
350 | struct symtab *s; | |
351 | Opaque line; | |
352 | int noerror; | |
353 | #endif | |
354 | { | |
355 | srcWin->detail.sourceInfo.horizontalOffset = 0; | |
356 | m_tuiShowSourceAsIs (s, line, noerror); | |
357 | ||
358 | return; | |
359 | } /* tuiShowSource */ | |
360 | ||
361 | ||
362 | /* | |
363 | ** tuiSourceIsDisplayed(). | |
364 | ** Answer whether the source is currently displayed in the source window. | |
365 | */ | |
366 | int | |
367 | #ifdef __STDC__ | |
368 | tuiSourceIsDisplayed ( | |
369 | char *fname) | |
370 | #else | |
371 | tuiSourceIsDisplayed (fname) | |
372 | char *fname; | |
373 | #endif | |
374 | { | |
375 | return (srcWin->generic.contentInUse && | |
376 | (strcmp (((TuiWinElementPtr) (locatorWinInfoPtr ())-> | |
377 | content[0])->whichElement.locator.fileName, fname) == 0)); | |
378 | } /* tuiSourceIsDisplayed */ | |
379 | ||
380 | ||
381 | /* | |
382 | ** tuiVerticalSourceScroll(). | |
383 | ** Scroll the source forward or backward vertically | |
384 | */ | |
385 | void | |
386 | #ifdef __STDC__ | |
387 | tuiVerticalSourceScroll ( | |
388 | TuiScrollDirection scrollDirection, | |
389 | int numToScroll) | |
390 | #else | |
391 | tuiVerticalSourceScroll (scrollDirection, numToScroll) | |
392 | TuiScrollDirection scrollDirection; | |
393 | int numToScroll; | |
394 | #endif | |
395 | { | |
396 | if (srcWin->generic.content != (OpaquePtr) NULL) | |
397 | { | |
398 | int line; | |
399 | Opaque addr; | |
400 | struct symtab *s; | |
401 | TuiWinContent content = (TuiWinContent) srcWin->generic.content; | |
402 | ||
403 | if (current_source_symtab == (struct symtab *) NULL) | |
404 | s = find_pc_symtab (selected_frame->pc); | |
405 | else | |
406 | s = current_source_symtab; | |
407 | ||
408 | if (scrollDirection == FORWARD_SCROLL) | |
409 | { | |
410 | line = content[0]->whichElement.source.lineOrAddr.lineNo + | |
411 | numToScroll; | |
412 | if (line > s->nlines) | |
413 | /*line = s->nlines - winInfo->generic.contentSize + 1;*/ | |
414 | /*elz: fix for dts 23398*/ | |
415 | line = content[0]->whichElement.source.lineOrAddr.lineNo; | |
416 | } | |
417 | else | |
418 | { | |
419 | line = content[0]->whichElement.source.lineOrAddr.lineNo - | |
420 | numToScroll; | |
421 | if (line <= 0) | |
422 | line = 1; | |
423 | } | |
424 | tuiUpdateSourceWindowAsIs (srcWin, s, (Opaque) line, FALSE); | |
425 | } | |
426 | ||
427 | return; | |
428 | } /* tuiVerticalSourceScroll */ | |
429 | ||
430 | ||
431 | /***************************************** | |
432 | ** STATIC LOCAL FUNCTIONS ** | |
433 | ******************************************/ | |
434 | ||
435 | /* | |
436 | ** _hasBreak(). | |
437 | ** Answer whether there is a break point at the input line in | |
438 | ** the source file indicated | |
439 | */ | |
440 | static struct breakpoint * | |
441 | #ifdef __STDC__ | |
442 | _hasBreak ( | |
443 | char *sourceFileName, | |
444 | int lineNo) | |
445 | #else | |
446 | _hasBreak (sourceFileName, lineNo) | |
447 | char *sourceFileName; | |
448 | int lineNo; | |
449 | #endif | |
450 | { | |
451 | struct breakpoint *bpWithBreak = (struct breakpoint *) NULL; | |
452 | struct breakpoint *bp; | |
453 | extern struct breakpoint *breakpoint_chain; | |
454 | ||
455 | ||
456 | for (bp = breakpoint_chain; | |
457 | (bp != (struct breakpoint *) NULL && | |
458 | bpWithBreak == (struct breakpoint *) NULL); | |
459 | bp = bp->next) | |
460 | if ((strcmp (sourceFileName, bp->source_file) == 0) && | |
461 | (lineNo == bp->line_number)) | |
462 | bpWithBreak = bp; | |
463 | ||
464 | return bpWithBreak; | |
465 | } /* _hasBreak */ |