Annotation of src/usr.bin/mg/buffer.c, Revision 1.89
1.89 ! florian 1: /* $OpenBSD: buffer.c,v 1.88 2012/12/27 18:51:52 florian Exp $ */
1.43 kjell 2:
3: /* This file is in the public domain. */
1.5 niklas 4:
1.1 deraadt 5: /*
6: * Buffer handling.
7: */
1.4 millert 8:
1.76 kjell 9: #include "def.h"
10: #include "kbd.h" /* needed for modes */
11:
1.56 kjell 12: #include <libgen.h>
13: #include <stdarg.h>
1.1 deraadt 14:
1.88 florian 15: #ifndef DIFFTOOL
16: #define DIFFTOOL "/usr/bin/diff"
17: #endif /* !DIFFTOOL */
18:
1.52 deraadt 19: static struct buffer *makelist(void);
1.65 kjell 20: static struct buffer *bnew(const char *);
1.75 lum 21:
22: static int usebufname(const char *);
1.1 deraadt 23:
1.67 kjell 24: /* Flag for global working dir */
25: extern int globalwd;
26:
1.50 kjell 27: /* ARGSUSED */
1.27 vincent 28: int
1.31 vincent 29: togglereadonly(int f, int n)
1.27 vincent 30: {
1.68 kjell 31: int s;
32:
33: if ((s = checkdirty(curbp)) != TRUE)
34: return (s);
1.47 kjell 35: if (!(curbp->b_flag & BFREADONLY))
1.27 vincent 36: curbp->b_flag |= BFREADONLY;
1.47 kjell 37: else {
1.68 kjell 38: curbp->b_flag &= ~BFREADONLY;
1.27 vincent 39: if (curbp->b_flag & BFCHG)
40: ewprintf("Warning: Buffer was modified");
41: }
1.70 kjell 42: curwp->w_rflag |= WFMODE;
1.27 vincent 43:
1.47 kjell 44: return (TRUE);
1.27 vincent 45: }
46:
1.73 deraadt 47: /* Switch to the named buffer.
48: * If no name supplied, switch to the default (alternate) buffer.
49: */
50: int
51: usebufname(const char *bufp)
52: {
53: struct buffer *bp;
54:
55: if (bufp == NULL)
56: return (ABORT);
57: if (bufp[0] == '\0' && curbp->b_altb != NULL)
58: bp = curbp->b_altb;
59: else if ((bp = bfind(bufp, TRUE)) == NULL)
60: return (FALSE);
61:
62: /* and put it in current window */
63: curbp = bp;
64: return (showbuffer(bp, curwp, WFFRAME | WFFULL));
65: }
66:
1.1 deraadt 67: /*
68: * Attach a buffer to a window. The values of dot and mark come
69: * from the buffer if the use count is 0. Otherwise, they come
70: * from some other window. *scratch* is the default alternate
71: * buffer.
72: */
1.3 millert 73: /* ARGSUSED */
74: int
1.26 vincent 75: usebuffer(int f, int n)
1.1 deraadt 76: {
1.34 vincent 77: char bufn[NBUFN], *bufp;
1.1 deraadt 78:
79: /* Get buffer to use from user */
1.21 deraadt 80: if ((curbp->b_altb == NULL) &&
81: ((curbp->b_altb = bfind("*scratch*", TRUE)) == NULL))
1.34 vincent 82: bufp = eread("Switch to buffer: ", bufn, NBUFN, EFNEW | EFBUF);
1.1 deraadt 83: else
1.34 vincent 84: bufp = eread("Switch to buffer: (default %s) ", bufn, NBUFN,
1.55 deraadt 85: EFNUL | EFNEW | EFBUF, curbp->b_altb->b_bname);
1.1 deraadt 86:
1.72 kjell 87: return (usebufname(bufp));
1.1 deraadt 88: }
89:
90: /*
91: * pop to buffer asked for by the user.
92: */
1.3 millert 93: /* ARGSUSED */
94: int
1.26 vincent 95: poptobuffer(int f, int n)
1.1 deraadt 96: {
1.52 deraadt 97: struct buffer *bp;
98: struct mgwin *wp;
1.34 vincent 99: char bufn[NBUFN], *bufp;
1.1 deraadt 100:
101: /* Get buffer to use from user */
1.21 deraadt 102: if ((curbp->b_altb == NULL) &&
103: ((curbp->b_altb = bfind("*scratch*", TRUE)) == NULL))
1.34 vincent 104: bufp = eread("Switch to buffer in other window: ", bufn, NBUFN,
1.55 deraadt 105: EFNEW | EFBUF);
1.1 deraadt 106: else
1.34 vincent 107: bufp = eread("Switch to buffer in other window: (default %s) ",
1.55 deraadt 108: bufn, NBUFN, EFNUL | EFNEW | EFBUF, curbp->b_altb->b_bname);
1.34 vincent 109: if (bufp == NULL)
1.37 db 110: return (ABORT);
1.44 kjell 111: if (bufp[0] == '\0' && curbp->b_altb != NULL)
1.3 millert 112: bp = curbp->b_altb;
113: else if ((bp = bfind(bufn, TRUE)) == NULL)
1.37 db 114: return (FALSE);
1.59 kjell 115: if (bp == curbp)
116: return (splitwind(f, n));
1.71 kjell 117: /* and put it in a new, non-ephemeral window */
118: if ((wp = popbuf(bp, WNONE)) == NULL)
1.37 db 119: return (FALSE);
1.1 deraadt 120: curbp = bp;
121: curwp = wp;
1.37 db 122: return (TRUE);
1.1 deraadt 123: }
124:
125: /*
126: * Dispose of a buffer, by name.
127: * Ask for the name. Look it up (don't get too
128: * upset if it isn't there at all!). Clear the buffer (ask
129: * if the buffer has been changed). Then free the header
1.69 kjell 130: * line and the buffer header. Bound to "C-X k".
1.1 deraadt 131: */
1.3 millert 132: /* ARGSUSED */
133: int
1.35 jfb 134: killbuffer_cmd(int f, int n)
1.1 deraadt 135: {
1.52 deraadt 136: struct buffer *bp;
1.34 vincent 137: char bufn[NBUFN], *bufp;
1.3 millert 138:
1.40 kjell 139: if ((bufp = eread("Kill buffer: (default %s) ", bufn, NBUFN,
140: EFNUL | EFNEW | EFBUF, curbp->b_bname)) == NULL)
1.37 db 141: return (ABORT);
1.44 kjell 142: else if (bufp[0] == '\0')
1.3 millert 143: bp = curbp;
144: else if ((bp = bfind(bufn, FALSE)) == NULL)
1.37 db 145: return (FALSE);
146: return (killbuffer(bp));
1.35 jfb 147: }
148:
149: int
1.52 deraadt 150: killbuffer(struct buffer *bp)
1.35 jfb 151: {
1.52 deraadt 152: struct buffer *bp1;
153: struct buffer *bp2;
154: struct mgwin *wp;
1.41 kjell 155: int s;
1.48 deraadt 156: struct undo_rec *rec, *next;
1.3 millert 157:
158: /*
1.37 db 159: * Find some other buffer to display. Try the alternate buffer,
1.3 millert 160: * then the first different buffer in the buffer list. If there's
161: * only one buffer, create buffer *scratch* and make it the alternate
162: * buffer. Return if *scratch* is only buffer...
1.1 deraadt 163: */
164: if ((bp1 = bp->b_altb) == NULL) {
165: bp1 = (bp == bheadp) ? bp->b_bufp : bheadp;
166: if (bp1 == NULL) {
167: /* only one buffer. see if it's *scratch* */
1.3 millert 168: if (bp == bfind("*scratch*", FALSE))
1.49 kjell 169: return (TRUE);
1.1 deraadt 170: /* create *scratch* for alternate buffer */
1.3 millert 171: if ((bp1 = bfind("*scratch*", TRUE)) == NULL)
1.37 db 172: return (FALSE);
1.1 deraadt 173: }
174: }
1.41 kjell 175: if ((s = bclear(bp)) != TRUE)
176: return (s);
1.1 deraadt 177: for (wp = wheadp; bp->b_nwnd > 0; wp = wp->w_wndp) {
1.3 millert 178: if (wp->w_bufp == bp) {
179: bp2 = bp1->b_altb; /* save alternate buffer */
1.58 kjell 180: if (showbuffer(bp1, wp, WFMODE | WFFRAME | WFFULL))
1.3 millert 181: bp1->b_altb = bp2;
182: else
183: bp1 = bp2;
184: }
185: }
186: if (bp == curbp)
187: curbp = bp1;
1.62 kjell 188: free(bp->b_headp); /* Release header line. */
1.3 millert 189: bp2 = NULL; /* Find the header. */
1.1 deraadt 190: bp1 = bheadp;
191: while (bp1 != bp) {
192: if (bp1->b_altb == bp)
193: bp1->b_altb = (bp->b_altb == bp1) ? NULL : bp->b_altb;
194: bp2 = bp1;
195: bp1 = bp1->b_bufp;
196: }
1.3 millert 197: bp1 = bp1->b_bufp; /* Next one in chain. */
198: if (bp2 == NULL) /* Unlink it. */
1.1 deraadt 199: bheadp = bp1;
200: else
201: bp2->b_bufp = bp1;
1.3 millert 202: while (bp1 != NULL) { /* Finish with altb's */
1.1 deraadt 203: if (bp1->b_altb == bp)
204: bp1->b_altb = (bp->b_altb == bp1) ? NULL : bp->b_altb;
205: bp1 = bp1->b_bufp;
206: }
1.74 oga 207: rec = TAILQ_FIRST(&bp->b_undo);
208:
1.46 kjell 209: while (rec != NULL) {
1.74 oga 210: next = TAILQ_NEXT(rec, next);
1.46 kjell 211: free_undo_record(rec);
212: rec = next;
213: }
214:
1.54 kjell 215: free(bp->b_bname); /* Release name block */
1.3 millert 216: free(bp); /* Release buffer block */
1.37 db 217: return (TRUE);
1.1 deraadt 218: }
219:
220: /*
221: * Save some buffers - just call anycb with the arg flag.
222: */
1.3 millert 223: /* ARGSUSED */
224: int
1.26 vincent 225: savebuffers(int f, int n)
1.1 deraadt 226: {
1.3 millert 227: if (anycb(f) == ABORT)
1.37 db 228: return (ABORT);
229: return (TRUE);
1.1 deraadt 230: }
231:
232: /*
1.19 art 233: * Listing buffers.
234: */
235: static int listbuf_ncol;
236:
237: static int listbuf_goto_buffer(int f, int n);
1.39 jason 238: static int listbuf_goto_buffer_one(int f, int n);
239: static int listbuf_goto_buffer_helper(int f, int n, int only);
1.19 art 240:
241: static PF listbuf_pf[] = {
1.37 db 242: listbuf_goto_buffer
1.19 art 243: };
1.39 jason 244: static PF listbuf_one[] = {
245: listbuf_goto_buffer_one
246: };
247:
1.19 art 248:
1.39 jason 249: static struct KEYMAPE (2 + IMAPEXT) listbufmap = {
250: 2,
251: 2 + IMAPEXT,
1.19 art 252: rescan,
253: {
1.39 jason 254: {
1.45 deraadt 255: CCHR('M'), CCHR('M'), listbuf_pf, NULL
1.39 jason 256: },
257: {
1.45 deraadt 258: '1', '1', listbuf_one, NULL
1.39 jason 259: }
1.19 art 260: }
261: };
262:
263: /*
1.1 deraadt 264: * Display the buffer list. This is done
265: * in two parts. The "makelist" routine figures out
266: * the text, and puts it in a buffer. "popbuf"
267: * then pops the data onto the screen. Bound to
268: * "C-X C-B".
269: */
1.3 millert 270: /* ARGSUSED */
271: int
1.26 vincent 272: listbuffers(int f, int n)
1.1 deraadt 273: {
1.52 deraadt 274: static int initialized = 0;
275: struct buffer *bp;
276: struct mgwin *wp;
1.1 deraadt 277:
1.19 art 278: if (!initialized) {
279: maps_add((KEYMAP *)&listbufmap, "listbufmap");
280: initialized = 1;
281: }
282:
1.71 kjell 283: if ((bp = makelist()) == NULL || (wp = popbuf(bp, WNONE)) == NULL)
1.37 db 284: return (FALSE);
285: wp->w_dotp = bp->b_dotp; /* fix up if window already on screen */
1.1 deraadt 286: wp->w_doto = bp->b_doto;
1.19 art 287: bp->b_modes[0] = name_mode("fundamental");
288: bp->b_modes[1] = name_mode("listbufmap");
289: bp->b_nmodes = 1;
290:
1.37 db 291: return (TRUE);
1.1 deraadt 292: }
293:
294: /*
295: * This routine rebuilds the text for the
1.37 db 296: * list buffers command. Return pointer
297: * to new list if everything works.
298: * Return NULL if there is an error (if
299: * there is no memory).
1.1 deraadt 300: */
1.52 deraadt 301: static struct buffer *
1.26 vincent 302: makelist(void)
1.3 millert 303: {
1.52 deraadt 304: int w = ncol / 2;
305: struct buffer *bp, *blp;
306: struct line *lp;
1.19 art 307:
1.3 millert 308: if ((blp = bfind("*Buffer List*", TRUE)) == NULL)
1.37 db 309: return (NULL);
1.3 millert 310: if (bclear(blp) != TRUE)
1.37 db 311: return (NULL);
1.3 millert 312: blp->b_flag &= ~BFCHG; /* Blow away old. */
1.28 vincent 313: blp->b_flag |= BFREADONLY;
1.1 deraadt 314:
1.19 art 315: listbuf_ncol = ncol; /* cache ncol for listbuf_goto_buffer */
316:
1.11 art 317: if (addlinef(blp, "%-*s%s", w, " MR Buffer", "Size File") == FALSE ||
318: addlinef(blp, "%-*s%s", w, " -- ------", "---- ----") == FALSE)
1.37 db 319: return (NULL);
1.11 art 320:
321: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
322: RSIZE nbytes;
323:
1.3 millert 324: nbytes = 0; /* Count bytes in buf. */
1.1 deraadt 325: if (bp != blp) {
1.63 kjell 326: lp = bfirstlp(bp);
1.62 kjell 327: while (lp != bp->b_headp) {
1.3 millert 328: nbytes += llength(lp) + 1;
1.1 deraadt 329: lp = lforw(lp);
330: }
1.3 millert 331: if (nbytes)
332: nbytes--; /* no bonus newline */
1.1 deraadt 333: }
1.11 art 334:
1.19 art 335: if (addlinef(blp, "%c%c%c %-*.*s%c%-6d %-*s",
1.11 art 336: (bp == curbp) ? '.' : ' ', /* current buffer ? */
337: ((bp->b_flag & BFCHG) != 0) ? '*' : ' ', /* changed ? */
1.27 vincent 338: ((bp->b_flag & BFREADONLY) != 0) ? ' ' : '*',
1.19 art 339: w - 5, /* four chars already written */
340: w - 5, /* four chars already written */
1.11 art 341: bp->b_bname, /* buffer name */
1.19 art 342: strlen(bp->b_bname) < w - 5 ? ' ' : '$', /* truncated? */
1.11 art 343: nbytes, /* buffer size */
344: w - 7, /* seven chars already written */
345: bp->b_fname) == FALSE)
1.37 db 346: return (NULL);
1.1 deraadt 347: }
1.63 kjell 348: blp->b_dotp = bfirstlp(blp); /* put dot at beginning of
1.3 millert 349: * buffer */
1.1 deraadt 350: blp->b_doto = 0;
1.37 db 351: return (blp); /* All done */
1.19 art 352: }
353:
354: static int
355: listbuf_goto_buffer(int f, int n)
356: {
1.39 jason 357: return (listbuf_goto_buffer_helper(f, n, 0));
358: }
359:
360: static int
361: listbuf_goto_buffer_one(int f, int n)
362: {
363: return (listbuf_goto_buffer_helper(f, n, 1));
364: }
365:
366: static int
367: listbuf_goto_buffer_helper(int f, int n, int only)
368: {
1.52 deraadt 369: struct buffer *bp;
370: struct mgwin *wp;
371: char *line = NULL;
372: int i, ret = FALSE;
1.19 art 373:
374: if (curwp->w_dotp->l_text[listbuf_ncol/2 - 1] == '$') {
375: ewprintf("buffer name truncated");
1.37 db 376: return (FALSE);
1.19 art 377: }
378:
379: if ((line = malloc(listbuf_ncol/2)) == NULL)
1.37 db 380: return (FALSE);
1.19 art 381:
382: memcpy(line, curwp->w_dotp->l_text + 4, listbuf_ncol/2 - 5);
383: for (i = listbuf_ncol/2 - 6; i > 0; i--) {
384: if (line[i] != ' ') {
385: line[i + 1] = '\0';
386: break;
387: }
388: }
1.37 db 389: if (i == 0)
1.42 cloder 390: goto cleanup;
1.19 art 391:
392: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
393: if (strcmp(bp->b_bname, line) == 0)
394: break;
395: }
1.37 db 396: if (bp == NULL)
1.42 cloder 397: goto cleanup;
1.37 db 398:
1.71 kjell 399: if ((wp = popbuf(bp, WNONE)) == NULL)
1.42 cloder 400: goto cleanup;
1.19 art 401: curbp = bp;
402: curwp = wp;
1.39 jason 403:
404: if (only)
1.42 cloder 405: ret = (onlywind(f, n));
406: else
407: ret = TRUE;
408:
409: cleanup:
410: free(line);
1.19 art 411:
1.42 cloder 412: return (ret);
1.1 deraadt 413: }
414:
415: /*
1.47 kjell 416: * The argument "fmt" points to a format string. Append this line to the
1.3 millert 417: * buffer. Handcraft the EOL on the end. Return TRUE if it worked and
1.1 deraadt 418: * FALSE if you ran out of room.
419: */
1.3 millert 420: int
1.52 deraadt 421: addlinef(struct buffer *bp, char *fmt, ...)
1.3 millert 422: {
1.52 deraadt 423: va_list ap;
424: struct line *lp;
1.1 deraadt 425:
1.30 vincent 426: if ((lp = lalloc(0)) == NULL)
427: return (FALSE);
1.8 art 428: va_start(ap, fmt);
1.30 vincent 429: if (vasprintf(&lp->l_text, fmt, ap) == -1) {
430: lfree(lp);
1.16 deraadt 431: va_end(ap);
1.30 vincent 432: return (FALSE);
1.16 deraadt 433: }
1.30 vincent 434: lp->l_used = strlen(lp->l_text);
1.8 art 435: va_end(ap);
436:
1.62 kjell 437: bp->b_headp->l_bp->l_fp = lp; /* Hook onto the end */
438: lp->l_bp = bp->b_headp->l_bp;
439: bp->b_headp->l_bp = lp;
440: lp->l_fp = bp->b_headp;
1.60 kjell 441: bp->b_lines++;
1.8 art 442:
1.37 db 443: return (TRUE);
1.1 deraadt 444: }
445:
446: /*
1.3 millert 447: * Look through the list of buffers, giving the user a chance to save them.
1.51 kjell 448: * Return TRUE if there are any changed buffers afterwards. Buffers that don't
449: * have an associated file don't count. Return FALSE if there are no changed
450: * buffers. Return ABORT if an error occurs or if the user presses c-g.
1.3 millert 451: */
452: int
1.26 vincent 453: anycb(int f)
1.3 millert 454: {
1.52 deraadt 455: struct buffer *bp;
1.79 lum 456: int s = FALSE, save = FALSE, save2 = FALSE, ret;
1.53 kjell 457: char pbuf[NFILEN + 11];
1.1 deraadt 458:
459: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
1.21 deraadt 460: if (bp->b_fname != NULL && *(bp->b_fname) != '\0' &&
461: (bp->b_flag & BFCHG) != 0) {
1.53 kjell 462: ret = snprintf(pbuf, sizeof(pbuf), "Save file %s",
1.17 deraadt 463: bp->b_fname);
1.53 kjell 464: if (ret < 0 || ret >= sizeof(pbuf)) {
1.51 kjell 465: ewprintf("Error: filename too long!");
1.81 lum 466: return (UERROR);
1.51 kjell 467: }
1.53 kjell 468: if ((f == TRUE || (save = eyorn(pbuf)) == TRUE) &&
1.79 lum 469: (save2 = buffsave(bp)) == TRUE) {
1.1 deraadt 470: bp->b_flag &= ~BFCHG;
471: upmodes(bp);
1.79 lum 472: } else {
473: if (save2 == FIOERR)
474: return (save2);
1.3 millert 475: s = TRUE;
1.79 lum 476: }
1.3 millert 477: if (save == ABORT)
478: return (save);
1.1 deraadt 479: save = TRUE;
480: }
481: }
482: if (save == FALSE /* && kbdmop == NULL */ ) /* experimental */
483: ewprintf("(No files need saving)");
1.37 db 484: return (s);
1.1 deraadt 485: }
486:
487: /*
488: * Search for a buffer, by name.
489: * If not found, and the "cflag" is TRUE,
1.57 kjell 490: * create a new buffer. Return pointer to the found
491: * (or new) buffer.
1.1 deraadt 492: */
1.52 deraadt 493: struct buffer *
1.26 vincent 494: bfind(const char *bname, int cflag)
1.3 millert 495: {
1.52 deraadt 496: struct buffer *bp;
1.1 deraadt 497:
498: bp = bheadp;
499: while (bp != NULL) {
1.7 art 500: if (strcmp(bname, bp->b_bname) == 0)
1.37 db 501: return (bp);
1.1 deraadt 502: bp = bp->b_bufp;
503: }
1.3 millert 504: if (cflag != TRUE)
1.37 db 505: return (NULL);
1.29 vincent 506:
1.65 kjell 507: bp = bnew(bname);
1.57 kjell 508:
509: return (bp);
510: }
511:
512: /*
513: * Create a new buffer and put it in the list of
1.66 deraadt 514: * all buffers.
1.57 kjell 515: */
516: static struct buffer *
1.65 kjell 517: bnew(const char *bname)
1.57 kjell 518: {
1.66 deraadt 519: struct buffer *bp;
1.57 kjell 520: struct line *lp;
521: int i;
1.72 kjell 522: size_t len;
1.57 kjell 523:
1.52 deraadt 524: bp = calloc(1, sizeof(struct buffer));
1.32 vincent 525: if (bp == NULL) {
1.52 deraadt 526: ewprintf("Can't get %d bytes", sizeof(struct buffer));
1.37 db 527: return (NULL);
1.1 deraadt 528: }
529: if ((lp = lalloc(0)) == NULL) {
1.29 vincent 530: free(bp);
1.37 db 531: return (NULL);
1.1 deraadt 532: }
1.3 millert 533: bp->b_altb = bp->b_bufp = NULL;
534: bp->b_dotp = lp;
535: bp->b_doto = 0;
1.1 deraadt 536: bp->b_markp = NULL;
537: bp->b_marko = 0;
1.3 millert 538: bp->b_flag = defb_flag;
1.72 kjell 539: /* if buffer name starts and ends with '*', we ignore changes */
540: len = strlen(bname);
541: if (len) {
542: if (bname[0] == '*' && bname[len - 1] == '*')
543: bp->b_flag |= BFIGNDIRTY;
544: }
1.3 millert 545: bp->b_nwnd = 0;
1.62 kjell 546: bp->b_headp = lp;
1.1 deraadt 547: bp->b_nmodes = defb_nmodes;
1.74 oga 548: TAILQ_INIT(&bp->b_undo);
1.46 kjell 549: bp->b_undoptr = NULL;
1.1 deraadt 550: i = 0;
551: do {
1.3 millert 552: bp->b_modes[i] = defb_modes[i];
553: } while (i++ < defb_nmodes);
1.1 deraadt 554: bp->b_fname[0] = '\0';
1.57 kjell 555: bp->b_cwd[0] = '\0';
1.1 deraadt 556: bzero(&bp->b_fi, sizeof(bp->b_fi));
557: lp->l_fp = lp;
558: lp->l_bp = lp;
559: bp->b_bufp = bheadp;
560: bheadp = bp;
1.60 kjell 561: bp->b_dotline = bp->b_markline = 1;
1.61 kjell 562: bp->b_lines = 1;
1.65 kjell 563: if ((bp->b_bname = strdup(bname)) == NULL) {
564: ewprintf("Can't get %d bytes", strlen(bname) + 1);
565: return (NULL);
566: }
1.57 kjell 567:
1.37 db 568: return (bp);
1.1 deraadt 569: }
570:
571: /*
572: * This routine blows away all of the text
573: * in a buffer. If the buffer is marked as changed
574: * then we ask if it is ok to blow it away; this is
575: * to save the user the grief of losing text. The
576: * window chain is nearly always wrong if this gets
577: * called; the caller must arrange for the updates
578: * that are required. Return TRUE if everything
579: * looks good.
580: */
1.3 millert 581: int
1.52 deraadt 582: bclear(struct buffer *bp)
1.3 millert 583: {
1.52 deraadt 584: struct line *lp;
585: int s;
1.1 deraadt 586:
1.72 kjell 587: /* Has buffer changed, and do we care? */
588: if (!(bp->b_flag & BFIGNDIRTY) && (bp->b_flag & BFCHG) != 0 &&
1.21 deraadt 589: (s = eyesno("Buffer modified; kill anyway")) != TRUE)
1.1 deraadt 590: return (s);
1.3 millert 591: bp->b_flag &= ~BFCHG; /* Not changed */
1.62 kjell 592: while ((lp = lforw(bp->b_headp)) != bp->b_headp)
1.1 deraadt 593: lfree(lp);
1.62 kjell 594: bp->b_dotp = bp->b_headp; /* Fix dot */
1.3 millert 595: bp->b_doto = 0;
596: bp->b_markp = NULL; /* Invalidate "mark" */
1.1 deraadt 597: bp->b_marko = 0;
1.60 kjell 598: bp->b_dotline = bp->b_markline = 1;
1.61 kjell 599: bp->b_lines = 1;
1.60 kjell 600:
1.37 db 601: return (TRUE);
1.1 deraadt 602: }
603:
604: /*
605: * Display the given buffer in the given window. Flags indicated
1.68 kjell 606: * action on redisplay. Update modified flag so insert loop can check it.
1.1 deraadt 607: */
1.3 millert 608: int
1.52 deraadt 609: showbuffer(struct buffer *bp, struct mgwin *wp, int flags)
1.3 millert 610: {
1.52 deraadt 611: struct buffer *obp;
612: struct mgwin *owp;
1.1 deraadt 613:
1.68 kjell 614: /* Ensure file has not been modified elsewhere */
615: if (fchecktime(bp) != TRUE)
616: bp->b_flag |= BFDIRTY;
617:
1.32 vincent 618: if (wp->w_bufp == bp) { /* Easy case! */
1.70 kjell 619: wp->w_rflag |= flags;
1.37 db 620: return (TRUE);
1.1 deraadt 621: }
1.37 db 622: /* First, detach the old buffer from the window */
1.1 deraadt 623: if ((bp->b_altb = obp = wp->w_bufp) != NULL) {
624: if (--obp->b_nwnd == 0) {
1.3 millert 625: obp->b_dotp = wp->w_dotp;
626: obp->b_doto = wp->w_doto;
1.1 deraadt 627: obp->b_markp = wp->w_markp;
628: obp->b_marko = wp->w_marko;
1.60 kjell 629: obp->b_dotline = wp->w_dotline;
630: obp->b_markline = wp->w_markline;
1.1 deraadt 631: }
632: }
633: /* Now, attach the new buffer to the window */
634: wp->w_bufp = bp;
635:
1.3 millert 636: if (bp->b_nwnd++ == 0) { /* First use. */
637: wp->w_dotp = bp->b_dotp;
638: wp->w_doto = bp->b_doto;
1.1 deraadt 639: wp->w_markp = bp->b_markp;
640: wp->w_marko = bp->b_marko;
1.60 kjell 641: wp->w_dotline = bp->b_dotline;
642: wp->w_markline = bp->b_markline;
1.1 deraadt 643: } else
1.3 millert 644: /* already on screen, steal values from other window */
1.1 deraadt 645: for (owp = wheadp; owp != NULL; owp = wp->w_wndp)
646: if (wp->w_bufp == bp && owp != wp) {
1.3 millert 647: wp->w_dotp = owp->w_dotp;
648: wp->w_doto = owp->w_doto;
1.1 deraadt 649: wp->w_markp = owp->w_markp;
650: wp->w_marko = owp->w_marko;
1.60 kjell 651: wp->w_dotline = owp->w_dotline;
1.64 kjell 652: wp->w_markline = owp->w_markline;
1.1 deraadt 653: break;
654: }
1.70 kjell 655: wp->w_rflag |= WFMODE | flags;
1.56 kjell 656: return (TRUE);
657: }
658:
659: /*
660: * Augment a buffer name with a number, if necessary
661: *
662: * If more than one file of the same basename() is open,
663: * the additional buffers are named "file<2>", "file<3>", and
664: * so forth. This function adjusts a buffer name to
665: * include the number, if necessary.
666: */
667: int
1.57 kjell 668: augbname(char *bn, const char *fn, size_t bs)
1.56 kjell 669: {
1.66 deraadt 670: int count;
1.56 kjell 671: size_t remain, len;
672:
1.77 kjell 673: if ((len = xbasename(bn, fn, bs)) >= bs)
1.56 kjell 674: return (FALSE);
675:
676: remain = bs - len;
677: for (count = 2; bfind(bn, FALSE) != NULL; count++)
678: snprintf(bn + len, remain, "<%d>", count);
679:
1.37 db 680: return (TRUE);
1.1 deraadt 681: }
682:
683: /*
684: * Pop the buffer we got passed onto the screen.
685: * Returns a status.
686: */
1.52 deraadt 687: struct mgwin *
1.71 kjell 688: popbuf(struct buffer *bp, int flags)
1.3 millert 689: {
1.52 deraadt 690: struct mgwin *wp;
1.1 deraadt 691:
1.3 millert 692: if (bp->b_nwnd == 0) { /* Not on screen yet. */
1.71 kjell 693: /*
694: * Pick a window for a pop-up.
695: * If only one window, split the screen.
696: * Flag the new window as ephemeral
697: */
698: if (wheadp->w_wndp == NULL &&
699: splitwind(FFOTHARG, flags) == FALSE)
700: return (NULL);
701:
702: /*
703: * Pick the uppermost window that isn't
704: * the current window. An LRU algorithm
705: * might be better. Return a pointer, or NULL on error.
706: */
707: wp = wheadp;
708:
709: while (wp != NULL && wp == curwp)
710: wp = wp->w_wndp;
1.1 deraadt 711: } else
712: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
713: if (wp->w_bufp == bp) {
1.70 kjell 714: wp->w_rflag |= WFFULL | WFFRAME;
1.37 db 715: return (wp);
1.1 deraadt 716: }
1.58 kjell 717: if (showbuffer(bp, wp, WFFULL) != TRUE)
1.37 db 718: return (NULL);
719: return (wp);
1.1 deraadt 720: }
721:
722: /*
723: * Insert another buffer at dot. Very useful.
724: */
1.3 millert 725: /* ARGSUSED */
726: int
1.26 vincent 727: bufferinsert(int f, int n)
1.1 deraadt 728: {
1.52 deraadt 729: struct buffer *bp;
730: struct line *clp;
1.36 deraadt 731: int clo, nline;
732: char bufn[NBUFN], *bufp;
1.1 deraadt 733:
734: /* Get buffer to use from user */
735: if (curbp->b_altb != NULL)
1.34 vincent 736: bufp = eread("Insert buffer: (default %s) ", bufn, NBUFN,
1.40 kjell 737: EFNUL | EFNEW | EFBUF, curbp->b_altb->b_bname);
1.1 deraadt 738: else
1.38 cloder 739: bufp = eread("Insert buffer: ", bufn, NBUFN, EFNEW | EFBUF);
1.34 vincent 740: if (bufp == NULL)
1.37 db 741: return (ABORT);
1.34 vincent 742: if (bufp[0] == '\0' && curbp->b_altb != NULL)
1.3 millert 743: bp = curbp->b_altb;
744: else if ((bp = bfind(bufn, FALSE)) == NULL)
1.37 db 745: return (FALSE);
1.1 deraadt 746:
1.3 millert 747: if (bp == curbp) {
1.1 deraadt 748: ewprintf("Cannot insert buffer into self");
1.37 db 749: return (FALSE);
1.1 deraadt 750: }
751: /* insert the buffer */
752: nline = 0;
1.63 kjell 753: clp = bfirstlp(bp);
1.3 millert 754: for (;;) {
1.1 deraadt 755: for (clo = 0; clo < llength(clp); clo++)
756: if (linsert(1, lgetc(clp, clo)) == FALSE)
1.37 db 757: return (FALSE);
1.62 kjell 758: if ((clp = lforw(clp)) == bp->b_headp)
1.3 millert 759: break;
760: if (newline(FFRAND, 1) == FALSE) /* fake newline */
1.37 db 761: return (FALSE);
1.1 deraadt 762: nline++;
763: }
1.3 millert 764: if (nline == 1)
765: ewprintf("[Inserted 1 line]");
766: else
767: ewprintf("[Inserted %d lines]", nline);
1.1 deraadt 768:
1.37 db 769: clp = curwp->w_linep; /* cosmetic adjustment */
1.3 millert 770: if (curwp->w_dotp == clp) { /* for offscreen insert */
1.62 kjell 771: while (nline-- && lback(clp) != curbp->b_headp)
1.1 deraadt 772: clp = lback(clp);
1.37 db 773: curwp->w_linep = clp; /* adjust framing. */
1.70 kjell 774: curwp->w_rflag |= WFFULL;
1.1 deraadt 775: }
776: return (TRUE);
777: }
778:
779: /*
780: * Turn off the dirty bit on this buffer.
781: */
1.3 millert 782: /* ARGSUSED */
783: int
1.26 vincent 784: notmodified(int f, int n)
1.1 deraadt 785: {
1.52 deraadt 786: struct mgwin *wp;
1.1 deraadt 787:
788: curbp->b_flag &= ~BFCHG;
1.3 millert 789: wp = wheadp; /* Update mode lines. */
1.1 deraadt 790: while (wp != NULL) {
791: if (wp->w_bufp == curbp)
1.70 kjell 792: wp->w_rflag |= WFMODE;
1.1 deraadt 793: wp = wp->w_wndp;
794: }
795: ewprintf("Modification-flag cleared");
1.37 db 796: return (TRUE);
1.1 deraadt 797: }
798:
799: /*
1.78 lum 800: * Popbuf and set all windows to top of buffer.
1.1 deraadt 801: */
1.3 millert 802: int
1.71 kjell 803: popbuftop(struct buffer *bp, int flags)
1.1 deraadt 804: {
1.52 deraadt 805: struct mgwin *wp;
1.1 deraadt 806:
1.63 kjell 807: bp->b_dotp = bfirstlp(bp);
1.3 millert 808: bp->b_doto = 0;
809: if (bp->b_nwnd != 0) {
810: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
811: if (wp->w_bufp == bp) {
812: wp->w_dotp = bp->b_dotp;
813: wp->w_doto = 0;
1.70 kjell 814: wp->w_rflag |= WFFULL;
1.3 millert 815: }
816: }
1.71 kjell 817: return (popbuf(bp, flags) != NULL);
1.1 deraadt 818: }
1.57 kjell 819:
820: /*
821: * Return the working directory for the current buffer, terminated
822: * with a '/'. First, try to extract it from the current buffer's
823: * filename. If that fails, use global cwd.
824: */
825: int
826: getbufcwd(char *path, size_t plen)
827: {
828: char cwd[NFILEN];
829:
830: if (plen == 0)
831: return (FALSE);
832:
1.67 kjell 833: if (globalwd == FALSE && curbp->b_cwd[0] != '\0') {
1.57 kjell 834: (void)strlcpy(path, curbp->b_cwd, plen);
835: } else {
836: if (getcwdir(cwd, sizeof(cwd)) == FALSE)
837: goto error;
838: (void)strlcpy(path, cwd, plen);
839: }
840: return (TRUE);
841: error:
842: path[0] = '\0';
843: return (FALSE);
844: }
845:
1.68 kjell 846: /*
1.69 kjell 847: * Ensures a buffer has not been modified elsewhere; e.g. on disk.
848: * Prompt the user if it has.
849: * Returns TRUE if it has NOT (i.e. buffer is ok to edit).
850: * FALSE or ABORT otherwise
1.68 kjell 851: */
852: int
853: checkdirty(struct buffer *bp)
854: {
855: int s;
1.83 florian 856:
857: if ((bp->b_flag & (BFCHG | BFDIRTY)) == 0)
858: if (fchecktime(bp) != TRUE)
859: bp->b_flag |= BFDIRTY;
860:
1.68 kjell 861: if ((bp->b_flag & (BFDIRTY | BFIGNDIRTY)) == BFDIRTY) {
1.84 florian 862: s = eynorr("File changed on disk; really edit the buffer");
863: switch (s) {
864: case TRUE:
865: bp->b_flag &= ~BFDIRTY;
866: bp->b_flag |= BFIGNDIRTY;
867: return (TRUE);
868: case REVERT:
869: dorevert();
870: return (FALSE);
871: default:
1.68 kjell 872: return (s);
1.84 florian 873: }
1.68 kjell 874: }
875:
876: return (TRUE);
877: }
1.82 jasper 878:
879: /*
880: * Revert the current buffer to whatever is on disk.
881: */
882: /* ARGSUSED */
883: int
884: revertbuffer(int f, int n)
885: {
886: char fbuf[NFILEN + 32];
887:
1.85 florian 888: if (curbp->b_fname[0] == 0) {
1.82 jasper 889: ewprintf("Cannot revert buffer not associated with any files.");
890: return (FALSE);
891: }
892:
1.85 florian 893: snprintf(fbuf, sizeof(fbuf), "Revert buffer from file %s",
894: curbp->b_fname);
1.82 jasper 895:
1.85 florian 896: if (eyorn(fbuf) == TRUE)
1.84 florian 897: return dorevert();
1.82 jasper 898:
1.84 florian 899: return (FALSE);
900: }
1.82 jasper 901:
1.84 florian 902: int
1.86 haesbaer 903: dorevert(void)
1.84 florian 904: {
905: int lineno;
1.89 ! florian 906: struct undo_rec *rec;
1.82 jasper 907:
1.85 florian 908: if (access(curbp->b_fname, F_OK|R_OK) != 0) {
1.84 florian 909: if (errno == ENOENT)
910: ewprintf("File %s no longer exists!",
1.85 florian 911: curbp->b_fname);
1.84 florian 912: else
913: ewprintf("File %s is no longer readable!",
1.85 florian 914: curbp->b_fname);
1.84 florian 915: return (FALSE);
1.82 jasper 916: }
917:
1.84 florian 918: /* Save our current line, so we can go back after reloading. */
1.85 florian 919: lineno = curwp->w_dotline;
1.84 florian 920:
921: /* Prevent readin from asking if we want to kill the buffer. */
922: curbp->b_flag &= ~BFCHG;
1.89 ! florian 923:
! 924: /* Clean up undo memory */
! 925: while ((rec = TAILQ_FIRST(&curbp->b_undo))) {
! 926: TAILQ_REMOVE(&curbp->b_undo, rec, next);
! 927: free_undo_record(rec);
! 928: }
1.84 florian 929:
1.85 florian 930: if (readin(curbp->b_fname))
1.84 florian 931: return(setlineno(lineno));
1.82 jasper 932: return (FALSE);
1.88 florian 933: }
934:
935: /*
936: * Diff the current buffer to what is on disk.
937: */
938: /*ARGSUSED */
939: int
940: diffbuffer(int f, int n)
941: {
942: struct buffer *bp;
943: struct line *lp, *lpend;
944: size_t len;
945: int ret;
946: char *text, *ttext;
947: char * const argv[] =
948: {DIFFTOOL, "-u", "-p", curbp->b_fname, "-", (char *)NULL};
949:
950: len = 0;
951:
952: /* C-u is not supported */
953: if (n > 1)
954: return (ABORT);
955:
956: if (access(DIFFTOOL, X_OK) != 0) {
957: ewprintf("%s not found or not executable.", DIFFTOOL);
958: return (FALSE);
959: }
960:
961: if (curbp->b_fname[0] == 0) {
962: ewprintf("Cannot diff buffer not associated with any files.");
963: return (FALSE);
964: }
965:
966: lpend = curbp->b_headp;
967: for (lp = lforw(lpend); lp != lpend; lp = lforw(lp)) {
968: len+=llength(lp);
969: if (lforw(lp) != lpend) /* no implied \n on last line */
970: len++;
971: }
972: if ((text = calloc(len + 1, sizeof(char))) == NULL) {
973: ewprintf("Cannot allocate memory.");
974: return (FALSE);
975: }
976: ttext = text;
977:
978: for (lp = lforw(lpend); lp != lpend; lp = lforw(lp)) {
979: if (llength(lp) != 0) {
980: memcpy(ttext, ltext(lp), llength(lp));
981: ttext += llength(lp);
982: }
983: if (lforw(lp) != lpend) /* no implied \n on last line */
984: *ttext++ = '\n';
985: }
986:
987: bp = bfind("*Diff*", TRUE);
988: bp->b_flag |= BFREADONLY;
989: if (bclear(bp) != TRUE) {
990: free(text);
991: return (FALSE);
992: }
993:
994: ret = pipeio(DIFFTOOL, argv, text, len, bp);
995:
996: if (ret == TRUE) {
997: eerase();
998: if (lforw(bp->b_headp) == bp->b_headp)
999: addline(bp, "Diff finished (no differences).");
1000: }
1001:
1002: free(text);
1003: return (ret);
1.82 jasper 1004: }
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