6e182d98 |
1 | /* |
2 | * TODO before releasable quality: |
3 | * |
4 | * - Thorough testing. |
5 | * |
6 | * - Half decent build system. |
7 | * |
8 | * TODO possibly after that: |
9 | * |
10 | * - Need to handle >2Gb files! Up the `filesize' type to long |
11 | * long and use it everywhere. |
12 | * |
13 | * - Multiple buffers, multiple on-screen windows. |
14 | * + ^X^F to open new file |
15 | * + ^X^R to open new file RO |
16 | * + ^X b to switch buffers in a window |
17 | * + ^X o to switch windows |
18 | * + ^X 2 to split a window |
19 | * + ^X 1 to destroy all windows but this |
20 | * + ^X 0 to destroy this window |
21 | * + ^X ^ to enlarge this window by one line |
22 | * + width settings vary per buffer (aha, _that's_ why I wanted |
23 | * a buffer structure surrounding the raw B-tree) |
24 | * + hex-editor-style minibuffer for entering search terms, |
25 | * rather than the current rather crap one; in particular |
26 | * this enables pasting into the search string. |
27 | * + er, how exactly do we deal with the problem of saving over |
28 | * a file which we're maintaining references to? |
29 | * |
30 | * - Undo! |
31 | * + this actually doesn't seem _too_ horrid. For a start, one |
32 | * simple approach would be to clone the entire buffer B-tree |
33 | * every time we perform an operation! That's actually not |
34 | * _too_ expensive, if we maintain a limit on the number of |
35 | * operations we may undo. |
36 | * + I had also thought of cloning the tree we insert for each |
37 | * buf_insert_data and cloning the one removed for each |
38 | * buf_delete_data (both must be cloned for an overwrite), |
39 | * but I'm not convinced that simply cloning the entire thing |
40 | * isn't a superior option. |
41 | * |
42 | * - Reverse search. |
43 | * + need to construct a reverse DFA. |
44 | * + probably should construct both every time, so that you can |
45 | * search forward for a thing and then immediately change |
46 | * your mind and search backward for the same thing. |
47 | * |
48 | * - In-place editing. |
49 | * + this is an extra option when running in Fix mode. It |
50 | * causes a change of semantics when saving: instead of |
51 | * constructing a new backup file and writing it over the old |
52 | * one, we simply seek within the original file and write out |
53 | * all the pieces that have changed. |
54 | * + Primarily useful for editing disk devices directly |
55 | * (yikes!). |
56 | * + I had intended to suggest that in Fix mode this would be |
57 | * nice and easy, since every element of the buffer tree is |
58 | * either a literal block (needs writing) or a from-file |
59 | * block denoting the same file _in the same position_. |
60 | * However, this is not in fact the case because you can cut |
61 | * and paste, so it's not that easy. |
62 | * + So I'm forced to the conclusion that when operating in |
63 | * this mode, it becomes illegal to cut and paste from-file |
64 | * blocks: they must be loaded in full at some point. |
65 | * * Thinking ahead about multiple-buffer operation: it |
66 | * would be a bad idea to keep a from-file block |
67 | * referencing /dev/hda and paste it into another ordinary |
68 | * buffer. But _also_ it would be a bad idea to paste a |
69 | * from-file block referencing a file stored _on_ /dev/hda |
70 | * into the in-place buffer dealing with /dev/hda itself. |
71 | * * So I'm forced to another odd conclusion, which is that |
72 | * from-file blocks must be eliminated in _two_ places: |
73 | * when copying a cut buffer _from_ an in-place buffer, |
74 | * _and_ when pasting a cut buffer _into_ one. |
75 | */ |
76 | |
77 | #include <stdio.h> |
78 | #include <stdlib.h> |
79 | #include <string.h> |
80 | #include <ctype.h> |
81 | #include <assert.h> |
82 | |
83 | #if defined(unix) && !defined(GO32) |
84 | #include <signal.h> |
85 | #include <sys/ioctl.h> |
86 | #include <termios.h> |
87 | #elif defined(MSDOS) |
88 | #include <dos.h> |
89 | #include <process.h> |
90 | #endif |
91 | |
92 | #include "tweak.h" |
93 | |
94 | static void init(void); |
95 | static void done(void); |
96 | static void load_file (char *); |
97 | |
98 | char toprint[256]; /* LUT: printable versions of chars */ |
99 | char hex[256][3]; /* LUT: binary to hex, 1 byte */ |
100 | |
101 | char message[80]; |
102 | |
103 | char decstatus[] = "%s TWEAK "VER": %-18.18s %s posn=%-10d size=%-10d"; |
104 | char hexstatus[] = "%s TWEAK "VER": %-18.18s %s posn=0x%-8X size=0x%-8X"; |
105 | char *statfmt = hexstatus; |
106 | |
107 | char last_char; |
108 | char *pname; |
109 | char *filename = NULL; |
110 | buffer *filedata, *cutbuffer = NULL; |
111 | int fix_mode = FALSE; |
112 | int look_mode = FALSE; |
113 | int eager_mode = FALSE; |
114 | int insert_mode = FALSE; |
115 | int edit_type = 1; /* 1,2 are hex digits, 0=ascii */ |
116 | int finished = FALSE; |
117 | int marking = FALSE; |
118 | int modified = FALSE; |
119 | int new_file = FALSE; /* shouldn't need initialisation - |
120 | * but let's not take chances :-) */ |
121 | int width = 16; |
122 | int realoffset = 0, offset = 16; |
123 | |
124 | int ascii_enabled = TRUE; |
125 | |
126 | long file_size = 0, top_pos = 0, cur_pos = 0, mark_point = 0; |
127 | |
128 | int scrlines; |
129 | |
130 | /* |
131 | * Main program |
132 | */ |
133 | int main(int argc, char **argv) { |
134 | int newoffset = -1, newwidth = -1; |
135 | |
136 | /* |
137 | * Parse command line arguments |
138 | */ |
139 | pname = *argv; /* program name */ |
140 | if (argc < 2) { |
141 | fprintf(stderr, |
142 | "usage: %s [-f] [-l] [-e] filename\n" |
143 | " or %s -D to write default tweak.rc to stdout\n", |
144 | pname, pname); |
145 | return 0; |
146 | } |
147 | |
148 | while (--argc > 0) { |
149 | char c, *p = *++argv, *value; |
150 | |
151 | if (*p == '-') { |
152 | p++; |
153 | while (*p) switch (c = *p++) { |
154 | case 'o': case 'O': |
155 | case 'w': case 'W': |
156 | /* |
157 | * these parameters require arguments |
158 | */ |
159 | if (*p) |
160 | value = p, p = ""; |
161 | else if (--argc) |
162 | value = *++argv; |
163 | else { |
164 | fprintf(stderr, "%s: option `-%c' requires an argument\n", |
165 | pname, c); |
166 | return 1; |
167 | } |
168 | switch (c) { |
169 | case 'o': case 'O': |
170 | newoffset = strtol(value, NULL, 0); /* allow `0xXX' */ |
171 | break; |
172 | case 'w': case 'W': |
173 | newwidth = strtol(value, NULL, 0); |
174 | break; |
175 | } |
176 | break; |
177 | case 'f': case 'F': |
178 | fix_mode = TRUE; |
179 | break; |
180 | case 'l': case 'L': |
181 | look_mode = TRUE; |
182 | break; |
183 | case 'e': case 'E': |
184 | eager_mode = TRUE; |
185 | break; |
186 | case 'D': |
187 | write_default_rc(); |
188 | return 0; |
189 | break; |
190 | } |
191 | } else { |
192 | if (filename) { |
193 | fprintf(stderr, "%s: multiple filenames specified\n", pname); |
194 | return 1; |
195 | } |
196 | filename = p; |
197 | } |
198 | } |
199 | |
200 | if (!filename) { |
201 | fprintf(stderr, "%s: no filename specified\n", pname); |
202 | return 1; |
203 | } |
204 | |
205 | read_rc(); |
206 | if (newoffset != -1) |
207 | realoffset = newoffset; |
208 | if (newwidth != -1) |
209 | width = newwidth; |
210 | load_file (filename); |
211 | init(); |
212 | fix_offset(); |
213 | do { |
214 | draw_scr (); |
215 | proc_key (); |
216 | } while (!finished); |
217 | done(); |
218 | |
219 | return 0; |
220 | } |
221 | |
222 | /* |
223 | * Fix up `offset' to match `realoffset'. Also, while we're here, |
224 | * enable or disable ASCII mode and sanity-check the width. |
225 | */ |
226 | void fix_offset(void) { |
227 | if (3*width+11 > display_cols) { |
228 | width = (display_cols-11) / 3; |
229 | sprintf (message, "Width reduced to %d to fit on the screen", width); |
230 | } |
231 | if (4*width+14 > display_cols) { |
232 | ascii_enabled = FALSE; |
233 | if (edit_type == 0) |
234 | edit_type = 1; /* force to hex mode */ |
235 | } else |
236 | ascii_enabled = TRUE; |
237 | offset = realoffset % width; |
238 | if (!offset) |
239 | offset = width; |
240 | } |
241 | |
242 | /* |
243 | * Initialise stuff at the beginning of the program: mostly the |
244 | * display. |
245 | */ |
246 | static void init(void) { |
247 | int i; |
248 | |
249 | display_setup(); |
250 | |
251 | display_define_colour(COL_BUFFER, 7, 0); |
252 | display_define_colour(COL_SELECT, 0, 7); |
253 | display_define_colour(COL_STATUS, 11, 4); |
254 | display_define_colour(COL_ESCAPE, 9, 0); |
255 | display_define_colour(COL_INVALID, 11, 0); |
256 | |
257 | for (i=0; i<256; i++) { |
258 | sprintf(hex[i], "%02X", i); |
259 | toprint[i] = (i>=32 && i<127 ? i : '.'); |
260 | } |
261 | } |
262 | |
263 | /* |
264 | * Clean up all the stuff that init() did. |
265 | */ |
266 | static void done(void) { |
267 | display_cleanup(); |
268 | } |
269 | |
270 | /* |
271 | * Load the file specified on the command line. |
272 | */ |
273 | static void load_file (char *fname) { |
274 | FILE *fp; |
275 | |
276 | file_size = 0; |
277 | if ( (fp = fopen (fname, "rb")) ) { |
278 | if (eager_mode) { |
279 | long len; |
280 | static char buffer[4096]; |
281 | |
282 | filedata = buf_new_empty(); |
283 | |
284 | file_size = 0; |
285 | |
286 | /* |
287 | * We've opened the file. Load it. |
288 | */ |
289 | while ( (len = fread (buffer, 1, sizeof(buffer), fp)) > 0 ) { |
290 | buf_insert_data (filedata, buffer, len, file_size); |
291 | file_size += len; |
292 | } |
293 | fclose (fp); |
294 | assert(file_size == buf_length(filedata)); |
295 | sprintf(message, "loaded %s (size %ld == 0x%lX).", |
296 | fname, file_size, file_size); |
297 | } else { |
298 | filedata = buf_new_from_file(fp); |
299 | file_size = buf_length(filedata); |
300 | sprintf(message, "opened %s (size %ld == 0x%lX).", |
301 | fname, file_size, file_size); |
302 | } |
303 | new_file = FALSE; |
304 | } else { |
305 | if (look_mode || fix_mode) { |
306 | fprintf(stderr, "%s: file %s not found, and %s mode active\n", |
307 | pname, fname, (look_mode ? "LOOK" : "FIX")); |
308 | exit (1); |
309 | } |
310 | filedata = buf_new_empty(); |
311 | sprintf(message, "New file %s.", fname); |
312 | new_file = TRUE; |
313 | } |
314 | } |
315 | |
316 | /* |
317 | * Save the file. Return TRUE on success, FALSE on error. |
318 | */ |
319 | int save_file (void) { |
320 | FILE *fp; |
321 | long pos = 0; |
322 | |
323 | if (look_mode) |
324 | return FALSE; /* do nothing! */ |
325 | |
326 | if ( (fp = fopen (filename, "wb")) ) { |
327 | static char buffer[SAVE_BLKSIZ]; |
328 | |
329 | while (pos < file_size) { |
330 | long size = file_size - pos; |
331 | if (size > SAVE_BLKSIZ) |
332 | size = SAVE_BLKSIZ; |
333 | |
334 | buf_fetch_data (filedata, buffer, size, pos); |
335 | if (size != fwrite (buffer, 1, size, fp)) { |
336 | fclose (fp); |
337 | return FALSE; |
338 | } |
339 | pos += size; |
340 | } |
341 | } else |
342 | return FALSE; |
343 | fclose (fp); |
344 | return TRUE; |
345 | } |
346 | |
347 | /* |
348 | * Make a backup of the file, if such has not already been done. |
349 | * Return TRUE on success, FALSE on error. |
350 | */ |
351 | int backup_file (void) { |
352 | char backup_name[FILENAME_MAX]; |
353 | |
354 | if (new_file) |
355 | return TRUE; /* unnecessary - pretend it's done */ |
356 | strcpy (backup_name, filename); |
357 | #if defined(unix) && !defined(GO32) |
358 | strcat (backup_name, ".bak"); |
359 | #elif defined(MSDOS) |
360 | { |
361 | char *p, *q; |
362 | |
363 | q = NULL; |
364 | for (p = backup_name; *p; p++) { |
365 | if (*p == '\\') |
366 | q = NULL; |
367 | else if (*p == '.') |
368 | q = p; |
369 | } |
370 | if (!q) |
371 | q = p; |
372 | strcpy (q, ".BAK"); |
373 | } |
374 | #endif |
375 | remove (backup_name); /* don't care if this fails */ |
376 | return !rename (filename, backup_name); |
377 | } |
378 | |
379 | static unsigned char *scrbuf = NULL; |
380 | static int scrbuflines = 0; |
381 | |
382 | /* |
383 | * Draw the screen, for normal usage. |
384 | */ |
385 | void draw_scr (void) { |
386 | int scrsize, scroff, llen, i, j; |
387 | long currpos; |
388 | int marktop, markbot, mark; |
389 | char *p; |
390 | unsigned char c, *q; |
391 | char *linebuf; |
392 | |
393 | scrlines = display_rows - 2; |
394 | if (scrlines > scrbuflines) { |
395 | scrbuf = (scrbuf ? |
396 | realloc(scrbuf, scrlines*width) : |
397 | malloc(scrlines*width)); |
398 | if (!scrbuf) { |
399 | done(); |
400 | fprintf(stderr, "%s: out of memory!\n", pname); |
401 | exit (2); |
402 | } |
403 | scrbuflines = scrlines; |
404 | } |
405 | |
406 | linebuf = malloc(width*4+20); |
407 | if (!linebuf) { |
408 | done(); |
409 | fprintf(stderr, "%s: out of memory!\n", pname); |
410 | exit (2); |
411 | } |
412 | memset (linebuf, ' ', width*4+13); |
413 | linebuf[width*4+13] = '\0'; |
414 | |
415 | if (top_pos == 0) |
416 | scroff = width - offset; |
417 | else |
418 | scroff = 0; |
419 | scrsize = scrlines * width - scroff; |
420 | if (scrsize > file_size - top_pos) |
421 | scrsize = file_size - top_pos; |
422 | |
423 | buf_fetch_data (filedata, scrbuf, scrsize, top_pos); |
424 | |
425 | scrsize += scroff; /* hack but it'll work */ |
426 | |
427 | mark = marking && (cur_pos != mark_point); |
428 | if (mark) { |
429 | if (cur_pos > mark_point) |
430 | marktop = mark_point, markbot = cur_pos; |
431 | else |
432 | marktop = cur_pos, markbot = mark_point; |
433 | } else |
434 | marktop = markbot = 0; /* placate gcc */ |
435 | |
436 | currpos = top_pos; |
437 | q = scrbuf; |
438 | |
439 | for (i=0; i<scrlines; i++) { |
440 | display_moveto (i, 0); |
441 | if (currpos<=cur_pos || currpos<file_size) { |
442 | p = hex[(currpos >> 24) & 0xFF]; |
443 | linebuf[0]=p[0]; |
444 | linebuf[1]=p[1]; |
445 | p = hex[(currpos >> 16) & 0xFF]; |
446 | linebuf[2]=p[0]; |
447 | linebuf[3]=p[1]; |
448 | p = hex[(currpos >> 8) & 0xFF]; |
449 | linebuf[4]=p[0]; |
450 | linebuf[5]=p[1]; |
451 | p = hex[currpos & 0xFF]; |
452 | linebuf[6]=p[0]; |
453 | linebuf[7]=p[1]; |
454 | for (j=0; j<width; j++) { |
455 | if (scrsize > 0) { |
456 | if (currpos == 0 && j < width-offset) |
457 | p = " ", c = ' '; |
458 | else |
459 | p = hex[*q], c = *q++; |
460 | scrsize--; |
461 | } else { |
462 | p = " ", c = ' '; |
463 | } |
464 | linebuf[11+3*j]=p[0]; |
465 | linebuf[12+3*j]=p[1]; |
466 | linebuf[13+3*width+j]=toprint[c]; |
467 | } |
468 | llen = (currpos ? width : offset); |
469 | if (mark && currpos<markbot && currpos+llen>marktop) { |
470 | /* |
471 | * Some of this line is marked. Maybe all. Whatever |
472 | * the precise details, there will be two regions |
473 | * requiring highlighting: a hex bit and an ascii |
474 | * bit. |
475 | */ |
476 | int localstart= (currpos<marktop?marktop:currpos) - currpos; |
477 | int localstop = (currpos+llen>markbot ? markbot : |
478 | currpos+llen) - currpos; |
479 | localstart += width-llen; |
480 | localstop += width-llen; |
481 | display_write_chars(linebuf, 11+3*localstart); |
482 | display_set_colour(COL_SELECT); |
483 | display_write_chars(linebuf+11+3*localstart, |
484 | 3*(localstop-localstart)-1); |
485 | display_set_colour(COL_BUFFER); |
486 | if (ascii_enabled) { |
487 | display_write_chars(linebuf+10+3*localstop, |
488 | 3+3*width+localstart-3*localstop); |
489 | display_set_colour(COL_SELECT); |
490 | display_write_chars(linebuf+13+3*width+localstart, |
491 | localstop-localstart); |
492 | display_set_colour(COL_BUFFER); |
493 | display_write_chars(linebuf+13+3*width+localstop, |
494 | width-localstop); |
495 | } else { |
496 | display_write_chars(linebuf+10+3*localstop, |
497 | 2+3*width-3*localstop); |
498 | } |
499 | } else |
500 | display_write_chars(linebuf, |
501 | ascii_enabled ? 13+4*width : 10+3*width); |
502 | } |
503 | currpos += (currpos ? width : offset); |
504 | display_clear_to_eol(); |
505 | } |
506 | |
507 | { |
508 | char status[80]; |
509 | int slen; |
510 | display_moveto (display_rows-2, 0); |
511 | display_set_colour(COL_STATUS); |
512 | sprintf(status, statfmt, |
513 | (modified ? "**" : " "), |
514 | filename, |
515 | (insert_mode ? "(Insert)" : |
516 | look_mode ? "(LOOK) " : |
517 | fix_mode ? "(FIX) " : "(Ovrwrt)"), |
518 | cur_pos, file_size); |
519 | slen = strlen(status); |
520 | if (slen > display_cols) |
521 | slen = display_cols; |
522 | display_write_chars(status, slen); |
523 | while (slen++ < display_cols) |
524 | display_write_str(" "); |
525 | display_set_colour(COL_BUFFER); |
526 | } |
527 | |
528 | display_moveto (display_rows-1, 0); |
529 | display_write_str (message); |
530 | display_clear_to_eol(); |
531 | message[0] = '\0'; |
532 | |
533 | i = cur_pos - top_pos; |
534 | if (top_pos == 0) |
535 | i += width - offset; |
536 | j = (edit_type ? (i%width)*3+10+edit_type : (i%width)+13+3*width); |
537 | if (j >= display_cols) |
538 | j = display_cols-1; |
539 | free (linebuf); |
540 | display_moveto (i/width, j); |
541 | display_refresh (); |
542 | } |
543 | |
544 | /* |
545 | * Get a string, in the "minibuffer". Return TRUE on success, FALSE |
546 | * on break. Possibly syntax-highlight the entered string for |
547 | * backslash-escapes, depending on the "highlight" parameter. |
548 | */ |
549 | int get_str (char *prompt, char *buf, int highlight) { |
550 | int maxlen = 79 - strlen(prompt); /* limit to 80 - who cares? :) */ |
551 | int len = 0; |
552 | int c; |
553 | |
554 | for (EVER) { |
555 | display_moveto (display_rows-1, 0); |
556 | display_set_colour (COL_MINIBUF); |
557 | display_write_str (prompt); |
558 | if (highlight) { |
559 | char *q, *p = buf, *r = buf+len; |
560 | while (p<r) { |
561 | q = p; |
562 | if (*p == '\\') { |
563 | p++; |
564 | if (p<r && *p == '\\') |
565 | p++, display_set_colour(COL_ESCAPE); |
566 | else if (p>=r || !isxdigit (*p)) |
567 | display_set_colour(COL_INVALID); |
568 | else if (p+1>=r || !isxdigit (p[1])) |
569 | p++, display_set_colour(COL_INVALID); |
570 | else |
571 | p+=2, display_set_colour(COL_ESCAPE); |
572 | } else { |
573 | while (p<r && *p != '\\') |
574 | p++; |
575 | display_set_colour (COL_MINIBUF); |
576 | } |
577 | display_write_chars (q, p-q); |
578 | } |
579 | } else |
580 | display_write_chars (buf, len); |
581 | display_set_colour (COL_MINIBUF); |
582 | display_clear_to_eol(); |
583 | display_refresh(); |
584 | if (update_required) |
585 | update(); |
586 | safe_update = TRUE; |
587 | c = display_getkey(); |
588 | safe_update = FALSE; |
589 | if (c == 13 || c == 10) { |
590 | buf[len] = '\0'; |
591 | return TRUE; |
592 | } else if (c == 27 || c == 7) { |
593 | display_beep(); |
594 | display_post_error(); |
595 | strcpy (message, "User Break!"); |
596 | return FALSE; |
597 | } |
598 | |
599 | if (c >= 32 && c <= 126) { |
600 | if (len < maxlen) |
601 | buf[len++] = c; |
602 | else |
603 | display_beep(); |
604 | } |
605 | |
606 | if ((c == 127 || c == 8) && len > 0) |
607 | len--; |
608 | |
609 | if (c == 'U'-'@') /* ^U kill line */ |
610 | len = 0; |
611 | } |
612 | } |
613 | |
614 | /* |
615 | * Take a buffer containing possible backslash-escapes, and return |
616 | * a buffer containing a (binary!) string. Since the string is |
617 | * binary, it cannot be null terminated: hence the length is |
618 | * returned from the function. The string is processed in place. |
619 | * |
620 | * Escapes are simple: a backslash followed by two hex digits |
621 | * represents that character; a doubled backslash represents a |
622 | * backslash itself; a backslash followed by anything else is |
623 | * invalid. (-1 is returned if an invalid sequence is detected.) |
624 | */ |
625 | int parse_quoted (char *buffer) { |
626 | char *p, *q; |
627 | |
628 | p = q = buffer; |
629 | while (*p) { |
630 | while (*p && *p != '\\') |
631 | *q++ = *p++; |
632 | if (*p == '\\') { |
633 | p++; |
634 | if (*p == '\\') |
635 | *q++ = *p++; |
636 | else if (p[1] && isxdigit(*p) && isxdigit(p[1])) { |
637 | char buf[3]; |
638 | buf[0] = *p++; |
639 | buf[1] = *p++; |
640 | buf[2] = '\0'; |
641 | *q++ = strtol(buf, NULL, 16); |
642 | } else |
643 | return -1; |
644 | } |
645 | } |
646 | return q - buffer; |
647 | } |
648 | |
649 | /* |
650 | * Suspend program. (Or shell out, depending on OS, of course.) |
651 | */ |
652 | void suspend(void) { |
653 | #if defined(unix) && !defined(GO32) |
654 | done(); |
655 | raise (SIGTSTP); |
656 | init(); |
657 | #elif defined(MSDOS) |
658 | done(); |
659 | spawnl (P_WAIT, getenv("COMSPEC"), "", NULL); |
660 | init(); |
661 | #else |
662 | display_beep(); |
663 | strcpy(message, "Suspend function not yet implemented."); |
664 | #endif |
665 | } |
666 | |
667 | volatile int safe_update, update_required; |
668 | |
669 | void update (void) { |
670 | display_recheck_size(); |
671 | fix_offset (); |
672 | draw_scr (); |
673 | } |
674 | |
675 | void schedule_update(void) { |
676 | if (safe_update) |
677 | update(); |
678 | else |
679 | update_required = TRUE; |
680 | } |
681 | |
682 | long parse_num (char *buffer, int *error) { |
683 | if (error) |
684 | *error = FALSE; |
685 | if (!buffer[strspn(buffer, "0123456789")]) { |
686 | /* interpret as decimal */ |
687 | return atoi(buffer); |
688 | } else if (buffer[0]=='0' && (buffer[1]=='X' || buffer[1]=='x') && |
689 | !buffer[2+strspn(buffer+2,"0123456789ABCDEFabcdef")]) { |
690 | return strtol(buffer+2, NULL, 16); |
691 | } else if (buffer[0]=='$' && |
692 | !buffer[1+strspn(buffer+1,"0123456789ABCDEFabcdef")]) { |
693 | return strtol(buffer+1, NULL, 16); |
694 | } else { |
695 | return 0; |
696 | if (error) |
697 | *error = TRUE; |
698 | } |
699 | } |