Annotation of src/usr.bin/mg/file.c, Revision 1.10
1.10 ! vincent 1: /* $OpenBSD: file.c,v 1.9 2001/05/24 03:05:22 mickey Exp $ */
1.5 niklas 2:
1.1 deraadt 3: /*
1.4 millert 4: * File commands.
1.1 deraadt 5: */
6:
1.6 art 7: #include <libgen.h>
1.4 millert 8: #include "def.h"
9:
1.1 deraadt 10: /*
1.4 millert 11: * Insert a file into the current buffer. Real easy - just call the
1.1 deraadt 12: * insertfile routine with the file name.
13: */
1.3 millert 14: /* ARGSUSED */
15: int
1.1 deraadt 16: fileinsert(f, n)
1.4 millert 17: int f, n;
1.1 deraadt 18: {
1.4 millert 19: int s;
20: char fname[NFILEN];
1.1 deraadt 21:
1.3 millert 22: s = eread("Insert file: ", fname, NFILEN, EFNEW | EFCR | EFFILE);
23: if (s != TRUE)
1.1 deraadt 24: return (s);
1.8 art 25: return insertfile(adjustname(fname), NULL, FALSE);
1.3 millert 26: /* don't set buffer name */
1.1 deraadt 27: }
28:
29: /*
1.9 mickey 30: * Select a file for editing. Look around to see if you can find the file
1.4 millert 31: * in another buffer; if you can find it, just switch to the buffer. If
1.9 mickey 32: * you cannot find the file, create a new buffer, read in the text, and
1.4 millert 33: * switch to the new buffer.
1.1 deraadt 34: */
1.3 millert 35: /* ARGSUSED */
36: int
1.1 deraadt 37: filevisit(f, n)
1.4 millert 38: int f, n;
1.1 deraadt 39: {
1.4 millert 40: BUFFER *bp;
41: int s;
42: char fname[NFILEN];
43: char *adjf;
1.1 deraadt 44:
1.3 millert 45: s = eread("Find file: ", fname, NFILEN, EFNEW | EFCR | EFFILE);
46: if (s != TRUE)
1.1 deraadt 47: return s;
48: adjf = adjustname(fname);
1.3 millert 49: if ((bp = findbuffer(adjf)) == NULL)
50: return FALSE;
1.1 deraadt 51: curbp = bp;
1.3 millert 52: if (showbuffer(bp, curwp, WFHARD) != TRUE)
53: return FALSE;
1.1 deraadt 54: if (bp->b_fname[0] == 0)
1.4 millert 55: return readin(adjf);
1.1 deraadt 56: return TRUE;
57: }
58:
59: /*
1.4 millert 60: * Pop to a file in the other window. Same as the last function, but uses
1.1 deraadt 61: * popbuf instead of showbuffer.
62: */
1.3 millert 63: /* ARGSUSED */
64: int
1.1 deraadt 65: poptofile(f, n)
1.4 millert 66: int f, n;
1.1 deraadt 67: {
1.4 millert 68: BUFFER *bp;
69: MGWIN *wp;
70: int s;
71: char fname[NFILEN];
72: char *adjf;
1.1 deraadt 73:
1.3 millert 74: if ((s = eread("Find file in other window: ", fname, NFILEN,
75: EFNEW | EFCR | EFFILE)) != TRUE)
1.1 deraadt 76: return s;
77: adjf = adjustname(fname);
1.3 millert 78: if ((bp = findbuffer(adjf)) == NULL)
79: return FALSE;
80: if ((wp = popbuf(bp)) == NULL)
81: return FALSE;
1.1 deraadt 82: curbp = bp;
83: curwp = wp;
84: if (bp->b_fname[0] == 0)
1.4 millert 85: return readin(adjf);
1.1 deraadt 86: return TRUE;
87: }
88:
89: /*
90: * given a file name, either find the buffer it uses, or create a new
91: * empty buffer to put it in.
92: */
93: BUFFER *
94: findbuffer(fname)
1.4 millert 95: char *fname;
1.1 deraadt 96: {
1.4 millert 97: BUFFER *bp;
1.10 ! vincent 98: char bname[NBUFN];
1.4 millert 99: unsigned int count = 1;
1.1 deraadt 100:
1.3 millert 101: for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
1.6 art 102: if (strcmp(bp->b_fname, fname) == 0)
1.1 deraadt 103: return bp;
104: }
1.4 millert 105: /* new buffer name */
1.6 art 106: for (count = 1; bfind(bname, FALSE) != NULL; count++)
1.10 ! vincent 107: ;
! 108: snprintf(bname, sizeof bname, "%s<%d>", basename(fname), count);
! 109:
1.1 deraadt 110: return bfind(bname, TRUE);
111: }
112:
113: /*
1.9 mickey 114: * Read the file "fname" into the current buffer. Make all of the text
115: * in the buffer go away, after checking for unsaved changes. This is
116: * called by the "read" command, the "visit" command, and the mainline
1.4 millert 117: * (for "uemacs file").
1.1 deraadt 118: */
1.3 millert 119: int
120: readin(fname)
1.4 millert 121: char *fname;
1.3 millert 122: {
1.4 millert 123: MGWIN *wp;
124: int status;
1.1 deraadt 125:
1.4 millert 126: /* might be old */
127: if (bclear(curbp) != TRUE)
1.1 deraadt 128: return TRUE;
1.3 millert 129: status = insertfile(fname, fname, TRUE);
1.4 millert 130:
131: /* no change */
132: curbp->b_flag &= ~BFCHG;
1.3 millert 133: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
1.1 deraadt 134: if (wp->w_bufp == curbp) {
1.3 millert 135: wp->w_dotp = wp->w_linep = lforw(curbp->b_linep);
136: wp->w_doto = 0;
1.1 deraadt 137: wp->w_markp = NULL;
138: wp->w_marko = 0;
139: }
140: }
141: return status;
142: }
1.4 millert 143:
1.1 deraadt 144: /*
145: * NB, getting file attributes is done here under control of a flag
146: * rather than in readin, which would be cleaner. I was concerned
147: * that some operating system might require the file to be open
148: * in order to get the information. Similarly for writing.
149: */
150:
151: /*
1.9 mickey 152: * Insert a file in the current buffer, after dot. Set mark at the end of
153: * the text inserted; point at the beginning. Return a standard status.
154: * Print a summary (lines read, error message) out as well. If the BACKUP
155: * conditional is set, then this routine also does the read end of backup
156: * processing. The BFBAK flag, if set in a buffer, says that a backup
157: * should be taken. It is set when a file is read in, but not on a new
1.4 millert 158: * file. (You don't need to make a backup copy of nothing.)
1.1 deraadt 159: */
1.9 mickey 160: static char *line = NULL;
161: static int linesize = 0;
1.1 deraadt 162:
1.3 millert 163: int
164: insertfile(fname, newname, needinfo)
1.4 millert 165: char *fname, *newname;
166: int needinfo;
1.3 millert 167: {
1.4 millert 168: BUFFER *bp;
169: LINE *lp1, *lp2;
170: LINE *olp; /* line we started at */
171: MGWIN *wp;
172: int nbytes, s, nline;
173: int opos; /* and offset into it */
174:
175: lp1 = NULL;
1.1 deraadt 176:
177: if (line == NULL) {
178: line = malloc(NLINE);
179: linesize = NLINE;
180: }
1.4 millert 181:
182: /* cheap */
183: bp = curbp;
1.8 art 184: if (newname != NULL)
1.10 ! vincent 185: (void)strlcpy(bp->b_fname, newname, sizeof bp->b_fname);
1.4 millert 186:
187: /* hard file open */
1.8 art 188: if ((s = ffropen(fname, needinfo ? bp : NULL)) == FIOERR)
1.1 deraadt 189: goto out;
1.4 millert 190: if (s == FIOFNF) {
191: /* file not found */
1.1 deraadt 192: if (newname != NULL)
193: ewprintf("(New file)");
1.3 millert 194: else
195: ewprintf("(File not found)");
1.1 deraadt 196: goto out;
197: }
198: opos = curwp->w_doto;
1.4 millert 199:
200: /* open a new line, at point, and start inserting after it */
1.7 art 201: (void)lnewline();
1.1 deraadt 202: olp = lback(curwp->w_dotp);
1.3 millert 203: if (olp == curbp->b_linep) {
1.1 deraadt 204: /* if at end of buffer, create a line to insert before */
1.7 art 205: (void)lnewline();
1.1 deraadt 206: curwp->w_dotp = lback(curwp->w_dotp);
207: }
1.4 millert 208:
209: /* don't count fake lines at the end */
210: nline = 0;
1.3 millert 211: while ((s = ffgetline(line, linesize, &nbytes)) != FIOERR) {
1.1 deraadt 212: doneread:
1.3 millert 213: switch (s) {
214: case FIOSUC:
215: ++nline;
216: /* and continue */
1.4 millert 217: case FIOEOF:
218: /* the last line of the file */
1.3 millert 219: if ((lp1 = lalloc(nbytes)) == NULL) {
1.4 millert 220: /* keep message on the display */
221: s = FIOERR;
222: goto endoffile;
1.3 millert 223: }
224: bcopy(line, <ext(lp1)[0], nbytes);
225: lp2 = lback(curwp->w_dotp);
226: lp2->l_fp = lp1;
227: lp1->l_fp = curwp->w_dotp;
228: lp1->l_bp = lp2;
229: curwp->w_dotp->l_bp = lp1;
230: if (s == FIOEOF)
231: goto endoffile;
232: break;
1.4 millert 233: case FIOLONG:{
234: /* a line too long to fit in our buffer */
1.9 mickey 235: char *cp;
236: int newsize;
1.3 millert 237:
238: newsize = linesize * 2;
239: if (newsize < 0 ||
1.4 millert 240: (cp = malloc((unsigned)newsize)) == NULL) {
1.3 millert 241: ewprintf("Could not allocate %d bytes",
1.4 millert 242: newsize);
243: s = FIOERR;
244: goto endoffile;
1.3 millert 245: }
246: bcopy(line, cp, linesize);
247: free(line);
248: line = cp;
1.9 mickey 249: s = ffgetline(line + linesize, linesize,
1.4 millert 250: &nbytes);
1.3 millert 251: nbytes += linesize;
252: linesize = newsize;
253: if (s == FIOERR)
254: goto endoffile;
255: goto doneread;
256: }
257: default:
258: ewprintf("Unknown code %d reading file", s);
259: s = FIOERR;
260: break;
1.1 deraadt 261: }
262: }
263: endoffile:
1.4 millert 264: /* ignore errors */
1.8 art 265: ffclose(NULL);
1.4 millert 266: /* don't zap an error */
267: if (s == FIOEOF) {
1.3 millert 268: if (nline == 1)
269: ewprintf("(Read 1 line)");
270: else
271: ewprintf("(Read %d lines)", nline);
1.1 deraadt 272: }
1.4 millert 273: /* set mark at the end of the text */
1.1 deraadt 274: curwp->w_dotp = curwp->w_markp = lback(curwp->w_dotp);
275: curwp->w_marko = llength(curwp->w_markp);
1.7 art 276: (void)ldelnewline();
1.1 deraadt 277: curwp->w_dotp = olp;
278: curwp->w_doto = opos;
1.3 millert 279: if (olp == curbp->b_linep)
280: curwp->w_dotp = lforw(olp);
1.1 deraadt 281: #ifndef NO_BACKUP
282: if (newname != NULL)
1.3 millert 283: bp->b_flag |= BFCHG | BFBAK; /* Need a backup. */
284: else
285: bp->b_flag |= BFCHG;
1.4 millert 286: #else /* !NO_BACKUP */
1.1 deraadt 287: bp->b_flag |= BFCHG;
1.4 millert 288: #endif /* !NO_BACKUP */
1.3 millert 289: /*
290: * if the insert was at the end of buffer, set lp1 to the end of
291: * buffer line, and lp2 to the beginning of the newly inserted text.
292: * (Otherwise lp2 is set to NULL.) This is used below to set
293: * pointers in other windows correctly if they are also at the end of
294: * buffer.
1.1 deraadt 295: */
296: lp1 = bp->b_linep;
297: if (curwp->w_markp == lp1) {
298: lp2 = curwp->w_dotp;
299: } else {
1.4 millert 300: /* delete extraneous newline */
1.7 art 301: (void)ldelnewline();
1.1 deraadt 302: out: lp2 = NULL;
303: }
1.3 millert 304: for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
1.1 deraadt 305: if (wp->w_bufp == curbp) {
1.3 millert 306: wp->w_flag |= WFMODE | WFEDIT;
1.1 deraadt 307: if (wp != curwp && lp2 != NULL) {
1.3 millert 308: if (wp->w_dotp == lp1)
309: wp->w_dotp = lp2;
310: if (wp->w_markp == lp1)
311: wp->w_markp = lp2;
312: if (wp->w_linep == lp1)
313: wp->w_linep = lp2;
1.1 deraadt 314: }
315: }
316: }
1.4 millert 317: /* return false if error */
318: return s != FIOERR;
1.1 deraadt 319: }
320:
321: /*
1.9 mickey 322: * Ask for a file name and write the contents of the current buffer to that
323: * file. Update the remembered file name and clear the buffer changed flag.
1.4 millert 324: * This handling of file names is different from the earlier versions and
325: * is more compatable with Gosling EMACS than with ITS EMACS.
1.1 deraadt 326: */
1.3 millert 327: /* ARGSUSED */
328: int
1.1 deraadt 329: filewrite(f, n)
1.4 millert 330: int f, n;
1.1 deraadt 331: {
1.4 millert 332: int s;
333: char fname[NFILEN];
334: char *adjfname;
1.1 deraadt 335:
1.3 millert 336: if ((s = eread("Write file: ", fname, NFILEN,
337: EFNEW | EFCR | EFFILE)) != TRUE)
1.1 deraadt 338: return (s);
339: adjfname = adjustname(fname);
340: /* old attributes are no longer current */
341: bzero(&curbp->b_fi, sizeof(curbp->b_fi));
1.3 millert 342: if ((s = writeout(curbp, adjfname)) == TRUE) {
1.10 ! vincent 343: (void)strlcpy(curbp->b_fname, adjfname, sizeof curbp->b_fname);
1.1 deraadt 344: #ifndef NO_BACKUP
345: curbp->b_flag &= ~(BFBAK | BFCHG);
1.4 millert 346: #else /* !NO_BACKUP */
1.1 deraadt 347: curbp->b_flag &= ~BFCHG;
1.4 millert 348: #endif /* !NO_BACKUP */
1.1 deraadt 349: upmodes(curbp);
350: }
351: return s;
352: }
353:
354: /*
1.4 millert 355: * Save the contents of the current buffer back into its associated file.
1.1 deraadt 356: */
357: #ifndef NO_BACKUP
358: #ifndef MAKEBACKUP
359: #define MAKEBACKUP TRUE
1.4 millert 360: #endif /* !MAKEBACKUP */
1.9 mickey 361: static int makebackup = MAKEBACKUP;
1.4 millert 362: #endif /* !NO_BACKUP */
1.1 deraadt 363:
1.3 millert 364: /* ARGSUSED */
365: int
1.1 deraadt 366: filesave(f, n)
1.4 millert 367: int f, n;
1.1 deraadt 368: {
369: return buffsave(curbp);
370: }
371:
372: /*
1.9 mickey 373: * Save the contents of the buffer argument into its associated file. Do
374: * nothing if there have been no changes (is this a bug, or a feature?).
375: * Error if there is no remembered file name. If this is the first write
1.4 millert 376: * since the read or visit, then a backup copy of the file is made.
1.9 mickey 377: * Allow user to select whether or not to make backup files by looking at
1.4 millert 378: * the value of makebackup.
1.1 deraadt 379: */
1.3 millert 380: int
381: buffsave(bp)
382: BUFFER *bp;
383: {
1.4 millert 384: int s;
1.1 deraadt 385:
1.4 millert 386: /* return, no changes */
387: if ((bp->b_flag & BFCHG) == 0) {
1.1 deraadt 388: ewprintf("(No changes need to be saved)");
389: return TRUE;
390: }
1.4 millert 391:
392: /* must have a name */
393: if (bp->b_fname[0] == '\0') {
1.1 deraadt 394: ewprintf("No file name");
395: return (FALSE);
396: }
1.4 millert 397:
1.1 deraadt 398: #ifndef NO_BACKUP
1.3 millert 399: if (makebackup && (bp->b_flag & BFBAK)) {
1.1 deraadt 400: s = fbackupfile(bp->b_fname);
1.4 millert 401: /* hard error */
402: if (s == ABORT)
1.1 deraadt 403: return FALSE;
1.4 millert 404: /* softer error */
1.9 mickey 405: if (s == FALSE &&
1.4 millert 406: (s = eyesno("Backup error, save anyway")) != TRUE)
1.1 deraadt 407: return s;
408: }
1.4 millert 409: #endif /* !NO_BACKUP */
1.3 millert 410: if ((s = writeout(bp, bp->b_fname)) == TRUE) {
1.1 deraadt 411: #ifndef NO_BACKUP
412: bp->b_flag &= ~(BFCHG | BFBAK);
1.4 millert 413: #else /* !NO_BACKUP */
1.1 deraadt 414: bp->b_flag &= ~BFCHG;
1.4 millert 415: #endif /* !NO_BACKUP */
1.1 deraadt 416: upmodes(bp);
417: }
418: return s;
419: }
420:
421: #ifndef NO_BACKUP
1.3 millert 422: /*
423: * Since we don't have variables (we probably should) this is a command
424: * processor for changing the value of the make backup flag. If no argument
425: * is given, sets makebackup to true, so backups are made. If an argument is
426: * given, no backup files are made when saving a new version of a file. Only
427: * used when BACKUP is #defined.
1.1 deraadt 428: */
1.3 millert 429: /* ARGSUSED */
430: int
1.1 deraadt 431: makebkfile(f, n)
1.4 millert 432: int f, n;
1.1 deraadt 433: {
1.3 millert 434: if (f & FFARG)
435: makebackup = n > 0;
436: else
437: makebackup = !makebackup;
1.1 deraadt 438: ewprintf("Backup files %sabled", makebackup ? "en" : "dis");
439: return TRUE;
440: }
1.4 millert 441: #endif /* !NO_BACKUP */
1.1 deraadt 442:
443: /*
444: * NB: bp is passed to both ffwopen and ffclose because some
445: * attribute information may need to be updated at open time
446: * and others after the close. This is OS-dependent. Note
447: * that the ff routines are assumed to be able to tell whether
448: * the attribute information has been set up in this buffer
449: * or not.
450: */
451:
452: /*
1.9 mickey 453: * This function performs the details of file writing; writing the file
454: * in buffer bp to file fn. Uses the file management routines in the
1.4 millert 455: * "fileio.c" package. Most of the grief is checking of some sort.
1.1 deraadt 456: */
1.3 millert 457: int
458: writeout(bp, fn)
459: BUFFER *bp;
460: char *fn;
461: {
1.4 millert 462: int s;
1.1 deraadt 463:
1.4 millert 464: /* open writes message */
465: if ((s = ffwopen(fn, bp)) != FIOSUC)
1.1 deraadt 466: return (FALSE);
467: s = ffputbuf(bp);
1.4 millert 468: if (s == FIOSUC) {
469: /* no write error */
1.1 deraadt 470: s = ffclose(bp);
1.3 millert 471: if (s == FIOSUC)
1.1 deraadt 472: ewprintf("Wrote %s", fn);
1.4 millert 473: } else
474: /* ignore close error if it is a write error */
1.7 art 475: (void)ffclose(bp);
1.1 deraadt 476: return s == FIOSUC;
477: }
478:
479: /*
1.4 millert 480: * Tag all windows for bp (all windows if bp == NULL) as needing their
1.1 deraadt 481: * mode line updated.
482: */
1.7 art 483: void
1.3 millert 484: upmodes(bp)
485: BUFFER *bp;
486: {
1.4 millert 487: MGWIN *wp;
1.1 deraadt 488:
489: for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
1.3 millert 490: if (bp == NULL || curwp->w_bufp == bp)
491: wp->w_flag |= WFMODE;
1.1 deraadt 492: }
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