Annotation of src/usr.bin/mg/util.c, Revision 1.13
1.13 ! kjell 1: /* $OpenBSD: random.c,v 1.12 2005/06/14 18:14:40 kjell Exp $ */
1.12 kjell 2:
3: /* This file is in the public domain. */
1.4 niklas 4:
1.1 deraadt 5: /*
6: * Assorted commands.
1.6 mickey 7: * This file contains the command processors for a large assortment of
8: * unrelated commands. The only thing they have in common is that they
1.3 millert 9: * are all command processors.
10: */
11:
12: #include "def.h"
1.9 vincent 13: #include <ctype.h>
1.1 deraadt 14:
15: /*
1.6 mickey 16: * Display a bunch of useful information about the current location of dot.
17: * The character under the cursor (in octal), the current line, row, and
18: * column, and approximate position of the cursor in the file (as a
19: * percentage) is displayed. The column position assumes an infinite
1.3 millert 20: * position display; it does not truncate just because the screen does.
1.1 deraadt 21: * This is normally bound to "C-X =".
22: */
1.2 millert 23: /* ARGSUSED */
1.3 millert 24: int
1.10 cloder 25: showcpos(int f, int n)
1.1 deraadt 26: {
1.3 millert 27: LINE *clp;
1.11 db 28: long nchar, cchar;
1.3 millert 29: int nline, row;
30: int cline, cbyte; /* Current line/char/byte */
31: int ratio;
32:
33: /* collect the data */
34: clp = lforw(curbp->b_linep);
35: cchar = 0;
36: cline = 0;
37: cbyte = 0;
1.1 deraadt 38: nchar = 0;
39: nline = 0;
1.6 mickey 40: for (;;) {
1.3 millert 41: /* count this line */
42: ++nline;
1.1 deraadt 43: if (clp == curwp->w_dotp) {
1.3 millert 44: /* mark line */
45: cline = nline;
1.1 deraadt 46: cchar = nchar + curwp->w_doto;
47: if (curwp->w_doto == llength(clp))
48: cbyte = '\n';
49: else
50: cbyte = lgetc(clp, curwp->w_doto);
51: }
1.3 millert 52: /* now count the chars */
53: nchar += llength(clp);
1.1 deraadt 54: clp = lforw(clp);
1.2 millert 55: if (clp == curbp->b_linep)
56: break;
1.3 millert 57: /* count the newline */
58: nchar++;
1.1 deraadt 59: }
1.3 millert 60: /* determine row */
61: row = curwp->w_toprow + 1;
1.1 deraadt 62: clp = curwp->w_linep;
1.2 millert 63: while (clp != curbp->b_linep && clp != curwp->w_dotp) {
1.1 deraadt 64: ++row;
65: clp = lforw(clp);
66: }
1.2 millert 67: /* NOSTRICT */
68: ratio = nchar ? (100L * cchar) / nchar : 100;
1.1 deraadt 69: ewprintf("Char: %c (0%o) point=%ld(%d%%) line=%d row=%d col=%d",
1.3 millert 70: cbyte, cbyte, cchar, ratio, cline, row, getcolpos());
1.11 db 71: return (TRUE);
1.1 deraadt 72: }
73:
1.3 millert 74: int
1.9 vincent 75: getcolpos(void)
1.2 millert 76: {
1.3 millert 77: int col, i, c;
78:
79: /* determine column */
1.9 vincent 80: col = 0;
1.1 deraadt 81:
1.2 millert 82: for (i = 0; i < curwp->w_doto; ++i) {
1.1 deraadt 83: c = lgetc(curwp->w_dotp, i);
84: if (c == '\t'
1.3 millert 85: #ifdef NOTAB
1.2 millert 86: && !(curbp->b_flag & BFNOTAB)
1.3 millert 87: #endif /* NOTAB */
1.1 deraadt 88: ) {
1.2 millert 89: col |= 0x07;
1.9 vincent 90: col++;
1.1 deraadt 91: } else if (ISCTRL(c) != FALSE)
1.9 vincent 92: col += 2;
93: else if (isprint(c))
94: col++;
95: else {
96: char tmp[5];
1.11 db 97: snprintf(tmp, sizeof(tmp), "\\%o", c);
1.9 vincent 98: col += strlen(tmp);
99: }
100:
1.1 deraadt 101: }
1.11 db 102: return (col);
1.1 deraadt 103: }
1.3 millert 104:
1.1 deraadt 105: /*
1.6 mickey 106: * Twiddle the two characters on either side of dot. If dot is at the end
107: * of the line twiddle the two characters before it. Return with an error
108: * if dot is at the beginning of line; it seems to be a bit pointless to
109: * make this work. This fixes up a very common typo with a single stroke.
110: * Normally bound to "C-T". This always works within a line, so "WFEDIT"
1.3 millert 111: * is good enough.
1.1 deraadt 112: */
1.2 millert 113: /* ARGSUSED */
1.3 millert 114: int
1.10 cloder 115: twiddle(int f, int n)
1.1 deraadt 116: {
1.3 millert 117: LINE *dotp;
118: int doto, cr;
1.1 deraadt 119:
120: dotp = curwp->w_dotp;
121: doto = curwp->w_doto;
1.2 millert 122: if (doto == llength(dotp)) {
123: if (--doto <= 0)
1.11 db 124: return (FALSE);
1.1 deraadt 125: } else {
1.2 millert 126: if (doto == 0)
1.11 db 127: return (FALSE);
1.1 deraadt 128: ++curwp->w_doto;
129: }
130: cr = lgetc(dotp, doto--);
1.2 millert 131: lputc(dotp, doto + 1, lgetc(dotp, doto));
1.1 deraadt 132: lputc(dotp, doto, cr);
133: lchange(WFEDIT);
1.11 db 134: return (TRUE);
1.1 deraadt 135: }
136:
137: /*
1.6 mickey 138: * Open up some blank space. The basic plan is to insert a bunch of
139: * newlines, and then back up over them. Everything is done by the
1.11 db 140: * subcommand processors. They even handle the looping. Normally this
1.3 millert 141: * is bound to "C-O".
1.1 deraadt 142: */
1.2 millert 143: /* ARGSUSED */
1.3 millert 144: int
1.10 cloder 145: openline(int f, int n)
1.1 deraadt 146: {
1.11 db 147: int i, s;
1.1 deraadt 148:
149: if (n < 0)
1.11 db 150: return (FALSE);
1.1 deraadt 151: if (n == 0)
1.11 db 152: return (TRUE);
1.3 millert 153:
154: /* insert newlines */
155: i = n;
1.1 deraadt 156: do {
157: s = lnewline();
1.2 millert 158: } while (s == TRUE && --i);
1.3 millert 159:
160: /* then go back up overtop of them all */
161: if (s == TRUE)
162: s = backchar(f | FFRAND, n);
1.11 db 163: return (s);
1.1 deraadt 164: }
165:
166: /*
1.3 millert 167: * Insert a newline. [following "feature" not present in current version of
168: * Gnu, and now disabled here too] If you are at the end of the line and the
1.6 mickey 169: * next line is a blank line, just move into the blank line. This makes
1.11 db 170: * "C-O" and "C-X C-O" work nicely, and reduces the amount of screen update
1.6 mickey 171: * that has to be done. This would not be as critical if screen update were a
1.3 millert 172: * lot more efficient.
1.1 deraadt 173: */
1.2 millert 174: /* ARGSUSED */
1.3 millert 175: int
1.10 cloder 176: newline(int f, int n)
1.1 deraadt 177: {
1.3 millert 178: LINE *lp;
179: int s;
1.1 deraadt 180:
1.2 millert 181: if (n < 0)
1.11 db 182: return (FALSE);
1.3 millert 183:
1.1 deraadt 184: while (n--) {
185: lp = curwp->w_dotp;
186: #ifdef undef
1.7 deraadt 187: if (llength(lp) == curwp->w_doto &&
188: lforw(lp) != curbp->b_linep &&
189: llength(lforw(lp)) == 0) {
1.2 millert 190: if ((s = forwchar(FFRAND, 1)) != TRUE)
1.11 db 191: return (s);
1.1 deraadt 192: } else
1.3 millert 193: #endif /* undef */
1.2 millert 194: if ((s = lnewline()) != TRUE)
1.11 db 195: return (s);
1.1 deraadt 196: }
1.11 db 197: return (TRUE);
1.1 deraadt 198: }
199:
200: /*
1.3 millert 201: * Delete blank lines around dot. What this command does depends if dot is
1.6 mickey 202: * sitting on a blank line. If dot is sitting on a blank line, this command
203: * deletes all the blank lines above and below the current line. If it is
204: * sitting on a non blank line then it deletes all of the blank lines after
205: * the line. Normally this command is bound to "C-X C-O". Any argument is
1.3 millert 206: * ignored.
1.1 deraadt 207: */
1.2 millert 208: /* ARGSUSED */
1.3 millert 209: int
1.10 cloder 210: deblank(int f, int n)
1.1 deraadt 211: {
1.3 millert 212: LINE *lp1, *lp2;
213: RSIZE nld;
1.1 deraadt 214:
215: lp1 = curwp->w_dotp;
1.2 millert 216: while (llength(lp1) == 0 && (lp2 = lback(lp1)) != curbp->b_linep)
1.1 deraadt 217: lp1 = lp2;
218: lp2 = lp1;
1.3 millert 219: nld = (RSIZE)0;
1.2 millert 220: while ((lp2 = lforw(lp2)) != curbp->b_linep && llength(lp2) == 0)
1.1 deraadt 221: ++nld;
222: if (nld == 0)
223: return (TRUE);
224: curwp->w_dotp = lforw(lp1);
225: curwp->w_doto = 0;
1.11 db 226: return (ldelete((RSIZE)nld, KNONE));
1.1 deraadt 227: }
228:
229: /*
230: * Delete any whitespace around dot, then insert a space.
231: */
1.3 millert 232: int
1.10 cloder 233: justone(int f, int n)
1.2 millert 234: {
1.5 art 235: (void)delwhite(f, n);
1.11 db 236: return (linsert(1, ' '));
1.1 deraadt 237: }
1.3 millert 238:
1.1 deraadt 239: /*
240: * Delete any whitespace around dot.
241: */
1.2 millert 242: /* ARGSUSED */
1.3 millert 243: int
1.10 cloder 244: delwhite(int f, int n)
1.1 deraadt 245: {
1.3 millert 246: int col, c, s;
1.1 deraadt 247:
248: col = curwp->w_doto;
1.3 millert 249:
1.8 vincent 250: while (col < llength(curwp->w_dotp) &&
251: ((c = lgetc(curwp->w_dotp, col)) == ' ' || c == '\t'))
1.1 deraadt 252: ++col;
253: do {
254: if (curwp->w_doto == 0) {
255: s = FALSE;
256: break;
257: }
1.2 millert 258: if ((s = backchar(FFRAND, 1)) != TRUE)
259: break;
1.1 deraadt 260: } while ((c = lgetc(curwp->w_dotp, curwp->w_doto)) == ' ' || c == '\t');
261:
1.2 millert 262: if (s == TRUE)
1.5 art 263: (void)forwchar(FFRAND, 1);
264: (void)ldelete((RSIZE)(col - curwp->w_doto), KNONE);
1.11 db 265: return (TRUE);
1.1 deraadt 266: }
1.3 millert 267:
1.1 deraadt 268: /*
1.3 millert 269: * Insert a newline, then enough tabs and spaces to duplicate the indentation
1.6 mickey 270: * of the previous line. Assumes tabs are every eight characters. Quite
271: * simple. Figure out the indentation of the current line. Insert a newline
272: * by calling the standard routine. Insert the indentation by inserting the
273: * right number of tabs and spaces. Return TRUE if all ok. Return FALSE if
1.11 db 274: * one of the subcommands failed. Normally bound to "C-J".
1.1 deraadt 275: */
1.2 millert 276: /* ARGSUSED */
1.3 millert 277: int
1.10 cloder 278: indent(int f, int n)
1.1 deraadt 279: {
1.11 db 280: int c, i, nicol;
1.1 deraadt 281:
1.2 millert 282: if (n < 0)
283: return (FALSE);
1.3 millert 284:
1.1 deraadt 285: while (n--) {
286: nicol = 0;
1.2 millert 287: for (i = 0; i < llength(curwp->w_dotp); ++i) {
1.1 deraadt 288: c = lgetc(curwp->w_dotp, i);
1.2 millert 289: if (c != ' ' && c != '\t')
1.1 deraadt 290: break;
291: if (c == '\t')
292: nicol |= 0x07;
293: ++nicol;
294: }
295: if (lnewline() == FALSE || ((
296: #ifdef NOTAB
1.3 millert 297: curbp->b_flag & BFNOTAB) ? linsert(nicol, ' ') == FALSE : (
298: #endif /* NOTAB */
299: ((i = nicol / 8) != 0 && linsert(i, '\t') == FALSE) ||
300: ((i = nicol % 8) != 0 && linsert(i, ' ') == FALSE))))
1.11 db 301: return (FALSE);
1.1 deraadt 302: }
1.11 db 303: return (TRUE);
1.1 deraadt 304: }
305:
306: /*
1.3 millert 307: * Delete forward. This is real easy, because the basic delete routine does
1.6 mickey 308: * all of the work. Watches for negative arguments, and does the right thing.
309: * If any argument is present, it kills rather than deletes, to prevent loss
1.3 millert 310: * of text if typed with a big argument. Normally bound to "C-D".
1.1 deraadt 311: */
1.2 millert 312: /* ARGSUSED */
1.3 millert 313: int
1.10 cloder 314: forwdel(int f, int n)
1.1 deraadt 315: {
316: if (n < 0)
1.11 db 317: return (backdel(f | FFRAND, -n));
1.3 millert 318:
319: /* really a kill */
320: if (f & FFARG) {
1.2 millert 321: if ((lastflag & CFKILL) == 0)
1.1 deraadt 322: kdelete();
323: thisflag |= CFKILL;
324: }
1.3 millert 325:
1.11 db 326: return (ldelete((RSIZE) n, (f & FFARG) ? KFORW : KNONE));
1.1 deraadt 327: }
328:
329: /*
1.6 mickey 330: * Delete backwards. This is quite easy too, because it's all done with
331: * other functions. Just move the cursor back, and delete forwards. Like
1.3 millert 332: * delete forward, this actually does a kill if presented with an argument.
1.1 deraadt 333: */
1.2 millert 334: /* ARGSUSED */
1.3 millert 335: int
1.10 cloder 336: backdel(int f, int n)
1.1 deraadt 337: {
1.3 millert 338: int s;
1.1 deraadt 339:
340: if (n < 0)
1.11 db 341: return (forwdel(f | FFRAND, -n));
1.3 millert 342:
343: /* really a kill */
344: if (f & FFARG) {
1.2 millert 345: if ((lastflag & CFKILL) == 0)
1.1 deraadt 346: kdelete();
347: thisflag |= CFKILL;
348: }
1.2 millert 349: if ((s = backchar(f | FFRAND, n)) == TRUE)
1.3 millert 350: s = ldelete((RSIZE)n, (f & FFARG) ? KFORW : KNONE);
351:
1.11 db 352: return (s);
1.1 deraadt 353: }
354:
355: /*
1.6 mickey 356: * Kill line. If called without an argument, it kills from dot to the end
357: * of the line, unless it is at the end of the line, when it kills the
358: * newline. If called with an argument of 0, it kills from the start of the
359: * line to dot. If called with a positive argument, it kills from dot
360: * forward over that number of newlines. If called with a negative argument
361: * it kills any text before dot on the current line, then it kills back
1.3 millert 362: * abs(arg) lines.
1.1 deraadt 363: */
1.2 millert 364: /* ARGSUSED */
1.3 millert 365: int
1.10 cloder 366: killline(int f, int n)
1.2 millert 367: {
1.3 millert 368: LINE *nextp;
369: RSIZE chunk;
370: int i, c;
371:
372: /* clear kill buffer if last wasn't a kill */
373: if ((lastflag & CFKILL) == 0)
374: kdelete();
1.1 deraadt 375: thisflag |= CFKILL;
376: if (!(f & FFARG)) {
377: for (i = curwp->w_doto; i < llength(curwp->w_dotp); ++i)
378: if ((c = lgetc(curwp->w_dotp, i)) != ' ' && c != '\t')
379: break;
380: if (i == llength(curwp->w_dotp))
1.2 millert 381: chunk = llength(curwp->w_dotp) - curwp->w_doto + 1;
1.1 deraadt 382: else {
1.2 millert 383: chunk = llength(curwp->w_dotp) - curwp->w_doto;
1.1 deraadt 384: if (chunk == 0)
385: chunk = 1;
386: }
387: } else if (n > 0) {
1.2 millert 388: chunk = llength(curwp->w_dotp) - curwp->w_doto + 1;
1.1 deraadt 389: nextp = lforw(curwp->w_dotp);
390: i = n;
391: while (--i) {
392: if (nextp == curbp->b_linep)
393: break;
1.2 millert 394: chunk += llength(nextp) + 1;
1.1 deraadt 395: nextp = lforw(nextp);
396: }
1.3 millert 397: } else {
398: /* n <= 0 */
1.1 deraadt 399: chunk = curwp->w_doto;
400: curwp->w_doto = 0;
401: i = n;
402: while (i++) {
403: if (lback(curwp->w_dotp) == curbp->b_linep)
404: break;
405: curwp->w_dotp = lback(curwp->w_dotp);
406: curwp->w_flag |= WFMOVE;
1.2 millert 407: chunk += llength(curwp->w_dotp) + 1;
1.1 deraadt 408: }
409: }
410: /*
1.3 millert 411: * KFORW here is a bug. Should be KBACK/KFORW, but we need to
1.1 deraadt 412: * rewrite the ldelete code (later)?
413: */
1.2 millert 414: return (ldelete(chunk, KFORW));
1.1 deraadt 415: }
416:
417: /*
1.6 mickey 418: * Yank text back from the kill buffer. This is really easy. All of the work
419: * is done by the standard insert routines. All you do is run the loop, and
1.3 millert 420: * check for errors. The blank lines are inserted with a call to "newline"
1.6 mickey 421: * instead of a call to "lnewline" so that the magic stuff that happens when
422: * you type a carriage return also happens when a carriage return is yanked
423: * back from the kill buffer. An attempt has been made to fix the cosmetic
424: * bug associated with a yank when dot is on the top line of the window
1.3 millert 425: * (nothing moves, because all of the new text landed off screen).
1.1 deraadt 426: */
1.2 millert 427: /* ARGSUSED */
1.3 millert 428: int
1.10 cloder 429: yank(int f, int n)
1.1 deraadt 430: {
1.3 millert 431: LINE *lp;
432: int c, i, nline;
1.1 deraadt 433:
1.2 millert 434: if (n < 0)
1.11 db 435: return (FALSE);
1.3 millert 436:
437: /* newline counting */
438: nline = 0;
439:
1.13 ! kjell 440: undo_add_boundary();
! 441: undo_no_boundary(TRUE);
1.1 deraadt 442: while (n--) {
1.3 millert 443: /* mark around last yank */
444: isetmark();
1.1 deraadt 445: i = 0;
1.2 millert 446: while ((c = kremove(i)) >= 0) {
1.1 deraadt 447: if (c == '\n') {
448: if (newline(FFRAND, 1) == FALSE)
1.11 db 449: return (FALSE);
1.1 deraadt 450: ++nline;
451: } else {
452: if (linsert(1, c) == FALSE)
1.11 db 453: return (FALSE);
1.1 deraadt 454: }
455: ++i;
456: }
457: }
1.3 millert 458: /* cosmetic adjustment */
459: lp = curwp->w_linep;
460:
461: /* if offscreen insert */
462: if (curwp->w_dotp == lp) {
1.2 millert 463: while (nline-- && lback(lp) != curbp->b_linep)
1.1 deraadt 464: lp = lback(lp);
1.3 millert 465: /* adjust framing */
466: curwp->w_linep = lp;
1.1 deraadt 467: curwp->w_flag |= WFHARD;
468: }
1.13 ! kjell 469: undo_no_boundary(FALSE);
! 470: undo_add_boundary();
1.11 db 471: return (TRUE);
1.1 deraadt 472: }
473:
474: #ifdef NOTAB
1.2 millert 475: /* ARGSUSED */
1.3 millert 476: int
1.10 cloder 477: space_to_tabstop(int f, int n)
1.1 deraadt 478: {
1.2 millert 479: if (n < 0)
1.11 db 480: return (FALSE);
1.2 millert 481: if (n == 0)
1.11 db 482: return (TRUE);
483: return (linsert((n << 3) - (curwp->w_doto & 7), ' '));
1.1 deraadt 484: }
1.3 millert 485: #endif /* NOTAB */
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