Annotation of src/usr.bin/top/display.c, Revision 1.3
1.3 ! millert 1: /* $OpenBSD: display.c,v 1.2 1997/08/22 07:16:27 downsj Exp $ */
1.1 downsj 2:
3: /*
4: * Top users/processes display for Unix
5: * Version 3
6: *
7: * This program may be freely redistributed,
8: * but this entire comment MUST remain intact.
9: *
10: * Copyright (c) 1984, 1989, William LeFebvre, Rice University
11: * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
12: */
13:
14: /*
15: * This file contains the routines that display information on the screen.
16: * Each section of the screen has two routines: one for initially writing
17: * all constant and dynamic text, and one for only updating the text that
18: * changes. The prefix "i_" is used on all the "initial" routines and the
19: * prefix "u_" is used for all the "updating" routines.
20: *
21: * ASSUMPTIONS:
22: * None of the "i_" routines use any of the termcap capabilities.
23: * In this way, those routines can be safely used on terminals that
24: * have minimal (or nonexistant) terminal capabilities.
25: *
26: * The routines are called in this order: *_loadave, i_timeofday,
27: * *_procstates, *_cpustates, *_memory, *_message, *_header,
28: * *_process, u_endscreen.
29: */
30:
1.2 downsj 31: #include <sys/types.h>
32: #include <stdio.h>
1.1 downsj 33: #include <ctype.h>
1.2 downsj 34: #include <stdlib.h>
35: #include <string.h>
36: #include <term.h>
1.1 downsj 37: #include <time.h>
1.2 downsj 38: #include <unistd.h>
1.1 downsj 39:
40: #include "screen.h" /* interface to screen package */
41: #include "layout.h" /* defines for screen position layout */
42: #include "display.h"
43: #include "top.h"
44: #include "top.local.h"
45: #include "boolean.h"
46: #include "machine.h" /* we should eliminate this!!! */
47: #include "utils.h"
48:
49: #ifdef DEBUG
50: FILE *debug;
51: #endif
52:
53: static int lmpid = 0;
54: static int last_hi = 0; /* used in u_process and u_endscreen */
55: static int lastline = 0;
56: static int display_width = MAX_COLS;
57:
1.2 downsj 58: static char *cpustates_tag __P((void));
59: static int string_count __P((char **));
1.3 ! millert 60: static void summary_format __P((char *, size_t, int *, char **));
1.2 downsj 61: static void line_update __P((char *, char *, int, int));
62:
1.1 downsj 63: #define lineindex(l) ((l)*display_width)
64:
65: /* things initialized by display_init and used thruout */
66:
67: /* buffer of proc information lines for display updating */
68: char *screenbuf = NULL;
69:
70: static char **procstate_names;
71: static char **cpustate_names;
72: static char **memory_names;
73:
74: static int num_procstates;
75: static int num_cpustates;
76: static int num_memory;
77:
78: static int *lprocstates;
79: static int *lcpustates;
80: static int *lmemory;
81:
82: static int *cpustate_columns;
83: static int cpustate_total_length;
84:
85: static enum { OFF, ON, ERASE } header_status = ON;
86:
87: static int string_count();
88: static void summary_format();
89: static void line_update();
90:
91: int display_resize()
92:
93: {
1.2 downsj 94: register int display_lines;
1.1 downsj 95:
96: /* first, deallocate any previous buffer that may have been there */
97: if (screenbuf != NULL)
98: {
99: free(screenbuf);
100: }
101:
102: /* calculate the current dimensions */
103: /* if operating in "dumb" mode, we only need one line */
1.2 downsj 104: display_lines = smart_terminal ? screen_length - Header_lines : 1;
1.1 downsj 105:
106: /* we don't want more than MAX_COLS columns, since the machine-dependent
107: modules make static allocations based on MAX_COLS and we don't want
108: to run off the end of their buffers */
109: display_width = screen_width;
110: if (display_width >= MAX_COLS)
111: {
112: display_width = MAX_COLS - 1;
113: }
114:
115: /* now, allocate space for the screen buffer */
1.2 downsj 116: screenbuf = (char *)malloc(display_lines * display_width);
1.1 downsj 117: if (screenbuf == (char *)NULL)
118: {
119: /* oops! */
120: return(-1);
121: }
122:
123: /* return number of lines available */
124: /* for dumb terminals, pretend like we can show any amount */
1.2 downsj 125: return(smart_terminal ? display_lines : Largest);
1.1 downsj 126: }
127:
128: int display_init(statics)
129:
130: struct statics *statics;
131:
132: {
1.2 downsj 133: register int display_lines;
1.1 downsj 134: register char **pp;
135: register int *ip;
136: register int i;
137:
138: /* call resize to do the dirty work */
1.2 downsj 139: display_lines = display_resize();
1.1 downsj 140:
141: /* only do the rest if we need to */
1.2 downsj 142: if (display_lines > -1)
1.1 downsj 143: {
144: /* save pointers and allocate space for names */
145: procstate_names = statics->procstate_names;
146: num_procstates = string_count(procstate_names);
147: lprocstates = (int *)malloc(num_procstates * sizeof(int));
148:
149: cpustate_names = statics->cpustate_names;
150: num_cpustates = string_count(cpustate_names);
151: lcpustates = (int *)malloc(num_cpustates * sizeof(int));
152: cpustate_columns = (int *)malloc(num_cpustates * sizeof(int));
153:
154: memory_names = statics->memory_names;
155: num_memory = string_count(memory_names);
156: lmemory = (int *)malloc(num_memory * sizeof(int));
157:
158: /* calculate starting columns where needed */
159: cpustate_total_length = 0;
160: pp = cpustate_names;
161: ip = cpustate_columns;
162: while (*pp != NULL)
163: {
164: if ((i = strlen(*pp++)) > 0)
165: {
166: *ip++ = cpustate_total_length;
167: cpustate_total_length += i + 8;
168: }
169: }
170: }
171:
172: /* return number of lines available */
1.2 downsj 173: return(display_lines);
1.1 downsj 174: }
175:
1.2 downsj 176: void i_loadave(mpid, avenrun)
1.1 downsj 177:
178: int mpid;
179: double *avenrun;
180:
181: {
182: register int i;
183:
184: /* i_loadave also clears the screen, since it is first */
185: clear();
186:
187: /* mpid == -1 implies this system doesn't have an _mpid */
188: if (mpid != -1)
189: {
190: printf("last pid: %5d; ", mpid);
191: }
192:
193: printf("load averages");
194:
195: for (i = 0; i < 3; i++)
196: {
197: printf("%c %5.2f",
198: i == 0 ? ':' : ',',
199: avenrun[i]);
200: }
201: lmpid = mpid;
202: }
203:
1.2 downsj 204: void u_loadave(mpid, avenrun)
1.1 downsj 205:
206: int mpid;
207: double *avenrun;
208:
209: {
210: register int i;
211:
212: if (mpid != -1)
213: {
214: /* change screen only when value has really changed */
215: if (mpid != lmpid)
216: {
217: Move_to(x_lastpid, y_lastpid);
218: printf("%5d", mpid);
219: lmpid = mpid;
220: }
221:
222: /* i remembers x coordinate to move to */
223: i = x_loadave;
224: }
225: else
226: {
227: i = x_loadave_nompid;
228: }
229:
230: /* move into position for load averages */
231: Move_to(i, y_loadave);
232:
233: /* display new load averages */
234: /* we should optimize this and only display changes */
235: for (i = 0; i < 3; i++)
236: {
237: printf("%s%5.2f",
238: i == 0 ? "" : ", ",
239: avenrun[i]);
240: }
241: }
242:
1.2 downsj 243: void i_timeofday(tod)
1.1 downsj 244:
245: time_t *tod;
246:
247: {
248: /*
249: * Display the current time.
250: * "ctime" always returns a string that looks like this:
251: *
252: * Sun Sep 16 01:03:52 1973
253: * 012345678901234567890123
254: * 1 2
255: *
256: * We want indices 11 thru 18 (length 8).
257: */
258:
259: if (smart_terminal)
260: {
261: Move_to(screen_width - 8, 0);
262: }
263: else
264: {
265: fputs(" ", stdout);
266: }
267: #ifdef DEBUG
268: {
269: char *foo;
270: foo = ctime(tod);
271: fputs(foo, stdout);
272: }
273: #endif
274: printf("%-8.8s\n", &(ctime(tod)[11]));
275: lastline = 1;
276: }
277:
278: static int ltotal = 0;
279: static char procstates_buffer[128];
280:
281: /*
282: * *_procstates(total, brkdn, names) - print the process summary line
283: *
284: * Assumptions: cursor is at the beginning of the line on entry
285: * lastline is valid
286: */
287:
1.2 downsj 288: void i_procstates(total, brkdn)
1.1 downsj 289:
290: int total;
291: int *brkdn;
292:
293: {
294: register int i;
295:
296: /* write current number of processes and remember the value */
297: printf("%d processes:", total);
298: ltotal = total;
299:
300: /* put out enough spaces to get to column 15 */
301: i = digits(total);
302: while (i++ < 4)
303: {
304: putchar(' ');
305: }
306:
307: /* format and print the process state summary */
1.3 ! millert 308: summary_format(procstates_buffer, sizeof(procstates_buffer), brkdn,
! 309: procstate_names);
1.1 downsj 310: fputs(procstates_buffer, stdout);
311:
312: /* save the numbers for next time */
313: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
314: }
315:
1.2 downsj 316: void u_procstates(total, brkdn)
1.1 downsj 317:
318: int total;
319: int *brkdn;
320:
321: {
322: static char new[128];
323: register int i;
324:
325: /* update number of processes only if it has changed */
326: if (ltotal != total)
327: {
328: /* move and overwrite */
329: #if (x_procstate == 0)
330: Move_to(x_procstate, y_procstate);
331: #else
332: /* cursor is already there...no motion needed */
333: /* assert(lastline == 1); */
334: #endif
335: printf("%d", total);
336:
337: /* if number of digits differs, rewrite the label */
338: if (digits(total) != digits(ltotal))
339: {
340: fputs(" processes:", stdout);
341: /* put out enough spaces to get to column 15 */
342: i = digits(total);
343: while (i++ < 4)
344: {
345: putchar(' ');
346: }
347: /* cursor may end up right where we want it!!! */
348: }
349:
350: /* save new total */
351: ltotal = total;
352: }
353:
354: /* see if any of the state numbers has changed */
355: if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0)
356: {
357: /* format and update the line */
1.3 ! millert 358: summary_format(new, sizeof(new), brkdn, procstate_names);
1.1 downsj 359: line_update(procstates_buffer, new, x_brkdn, y_brkdn);
360: memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
361: }
362: }
363:
364: /*
365: * *_cpustates(states, names) - print the cpu state percentages
366: *
367: * Assumptions: cursor is on the PREVIOUS line
368: */
369:
370: static int cpustates_column;
371:
372: /* cpustates_tag() calculates the correct tag to use to label the line */
373:
1.2 downsj 374: static char *cpustates_tag()
1.1 downsj 375:
376: {
377: register char *use;
378:
379: static char *short_tag = "CPU: ";
380: static char *long_tag = "CPU states: ";
381:
382: /* if length + strlen(long_tag) >= screen_width, then we have to
383: use the shorter tag (we subtract 2 to account for ": ") */
384: if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width)
385: {
386: use = short_tag;
387: }
388: else
389: {
390: use = long_tag;
391: }
392:
393: /* set cpustates_column accordingly then return result */
394: cpustates_column = strlen(use);
395: return(use);
396: }
397:
1.2 downsj 398: void i_cpustates(states)
1.1 downsj 399:
400: register int *states;
401:
402: {
403: register int i = 0;
404: register int value;
405: register char **names = cpustate_names;
406: register char *thisname;
407:
408: /* print tag and bump lastline */
409: printf("\n%s", cpustates_tag());
410: lastline++;
411:
412: /* now walk thru the names and print the line */
413: while ((thisname = *names++) != NULL)
414: {
415: if (*thisname != '\0')
416: {
417: /* retrieve the value and remember it */
418: value = *states++;
419:
420: /* if percentage is >= 1000, print it as 100% */
421: printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"),
422: i++ == 0 ? "" : ", ",
423: ((float)value)/10.,
424: thisname);
425: }
426: }
427:
428: /* copy over values into "last" array */
429: memcpy(lcpustates, states, num_cpustates * sizeof(int));
430: }
431:
1.2 downsj 432: void u_cpustates(states)
1.1 downsj 433:
434: register int *states;
435:
436: {
437: register int value;
438: register char **names = cpustate_names;
439: register char *thisname;
440: register int *lp;
441: register int *colp;
442:
443: Move_to(cpustates_column, y_cpustates);
444: lastline = y_cpustates;
445: lp = lcpustates;
446: colp = cpustate_columns;
447:
448: /* we could be much more optimal about this */
449: while ((thisname = *names++) != NULL)
450: {
451: if (*thisname != '\0')
452: {
453: /* did the value change since last time? */
454: if (*lp != *states)
455: {
456: /* yes, move and change */
457: Move_to(cpustates_column + *colp, y_cpustates);
458: lastline = y_cpustates;
459:
460: /* retrieve value and remember it */
461: value = *states;
462:
463: /* if percentage is >= 1000, print it as 100% */
464: printf((value >= 1000 ? "%4.0f" : "%4.1f"),
465: ((double)value)/10.);
466:
467: /* remember it for next time */
468: *lp = *states;
469: }
470: }
471:
472: /* increment and move on */
473: lp++;
474: states++;
475: colp++;
476: }
477: }
478:
1.2 downsj 479: void z_cpustates()
1.1 downsj 480:
481: {
482: register int i = 0;
483: register char **names = cpustate_names;
484: register char *thisname;
485: register int *lp;
486:
487: /* show tag and bump lastline */
488: printf("\n%s", cpustates_tag());
489: lastline++;
490:
491: while ((thisname = *names++) != NULL)
492: {
493: if (*thisname != '\0')
494: {
495: printf("%s %% %s", i++ == 0 ? "" : ", ", thisname);
496: }
497: }
498:
499: /* fill the "last" array with all -1s, to insure correct updating */
500: lp = lcpustates;
501: i = num_cpustates;
502: while (--i >= 0)
503: {
504: *lp++ = -1;
505: }
506: }
507:
508: /*
509: * *_memory(stats) - print "Memory: " followed by the memory summary string
510: *
511: * Assumptions: cursor is on "lastline"
512: * for i_memory ONLY: cursor is on the previous line
513: */
514:
1.2 downsj 515: static char memory_buffer[MAX_COLS];
1.1 downsj 516:
1.2 downsj 517: void i_memory(stats)
1.1 downsj 518:
519: int *stats;
520:
521: {
522: fputs("\nMemory: ", stdout);
523: lastline++;
524:
525: /* format and print the memory summary */
1.3 ! millert 526: summary_format(memory_buffer, sizeof(memory_buffer), stats, memory_names);
1.1 downsj 527: fputs(memory_buffer, stdout);
528: }
529:
1.2 downsj 530: void u_memory(stats)
1.1 downsj 531:
532: int *stats;
533:
534: {
535: static char new[MAX_COLS];
536:
537: /* format the new line */
1.3 ! millert 538: summary_format(new, sizeof(new), stats, memory_names);
1.1 downsj 539: line_update(memory_buffer, new, x_mem, y_mem);
540: }
541:
542: /*
543: * *_message() - print the next pending message line, or erase the one
544: * that is there.
545: *
546: * Note that u_message is (currently) the same as i_message.
547: *
548: * Assumptions: lastline is consistent
549: */
550:
551: /*
552: * i_message is funny because it gets its message asynchronously (with
553: * respect to screen updates).
554: */
555:
556: static char next_msg[MAX_COLS + 5];
557: static int msglen = 0;
558: /* Invariant: msglen is always the length of the message currently displayed
559: on the screen (even when next_msg doesn't contain that message). */
560:
1.2 downsj 561: void i_message()
1.1 downsj 562:
563: {
564: while (lastline < y_message)
565: {
566: fputc('\n', stdout);
567: lastline++;
568: }
569: if (next_msg[0] != '\0')
570: {
571: standout(next_msg);
572: msglen = strlen(next_msg);
573: next_msg[0] = '\0';
574: }
575: else if (msglen > 0)
576: {
577: (void) clear_eol(msglen);
578: msglen = 0;
579: }
580: }
581:
1.2 downsj 582: void u_message()
1.1 downsj 583:
584: {
585: i_message();
586: }
587:
588: static int header_length;
589:
590: /*
591: * *_header(text) - print the header for the process area
592: *
593: * Assumptions: cursor is on the previous line and lastline is consistent
594: */
595:
1.2 downsj 596: void i_header(text)
1.1 downsj 597:
598: char *text;
599:
600: {
601: header_length = strlen(text);
602: if (header_status == ON)
603: {
604: putchar('\n');
605: fputs(text, stdout);
606: lastline++;
607: }
608: else if (header_status == ERASE)
609: {
610: header_status = OFF;
611: }
612: }
613:
614: /*ARGSUSED*/
1.2 downsj 615: void u_header(text)
1.1 downsj 616:
617: char *text; /* ignored */
618:
619: {
620: if (header_status == ERASE)
621: {
622: putchar('\n');
623: lastline++;
624: clear_eol(header_length);
625: header_status = OFF;
626: }
627: }
628:
629: /*
630: * *_process(line, thisline) - print one process line
631: *
632: * Assumptions: lastline is consistent
633: */
634:
1.2 downsj 635: void i_process(line, thisline)
1.1 downsj 636:
637: int line;
638: char *thisline;
639:
640: {
641: register char *p;
642: register char *base;
643:
644: /* make sure we are on the correct line */
645: while (lastline < y_procs + line)
646: {
647: putchar('\n');
648: lastline++;
649: }
650:
651: /* truncate the line to conform to our current screen width */
652: thisline[display_width] = '\0';
653:
654: /* write the line out */
655: fputs(thisline, stdout);
656:
657: /* copy it in to our buffer */
658: base = smart_terminal ? screenbuf + lineindex(line) : screenbuf;
659: p = strecpy(base, thisline);
660:
661: /* zero fill the rest of it */
1.2 downsj 662: memset(p, 0, display_width - (p - base));
1.1 downsj 663: }
664:
1.2 downsj 665: void u_process(linenum, linebuf)
1.1 downsj 666:
1.2 downsj 667: int linenum;
668: char *linebuf;
1.1 downsj 669:
670: {
671: register char *optr;
1.2 downsj 672: register int screen_line = linenum + Header_lines;
1.1 downsj 673: register char *bufferline;
674:
675: /* remember a pointer to the current line in the screen buffer */
1.2 downsj 676: bufferline = &screenbuf[lineindex(linenum)];
1.1 downsj 677:
678: /* truncate the line to conform to our current screen width */
1.2 downsj 679: linebuf[display_width] = '\0';
1.1 downsj 680:
681: /* is line higher than we went on the last display? */
1.2 downsj 682: if (linenum >= last_hi)
1.1 downsj 683: {
684: /* yes, just ignore screenbuf and write it out directly */
685: /* get positioned on the correct line */
686: if (screen_line - lastline == 1)
687: {
688: putchar('\n');
689: lastline++;
690: }
691: else
692: {
693: Move_to(0, screen_line);
694: lastline = screen_line;
695: }
696:
697: /* now write the line */
1.2 downsj 698: fputs(linebuf, stdout);
1.1 downsj 699:
700: /* copy it in to the buffer */
1.2 downsj 701: optr = strecpy(bufferline, linebuf);
1.1 downsj 702:
703: /* zero fill the rest of it */
1.2 downsj 704: memset(optr, 0, display_width - (optr - bufferline));
1.1 downsj 705: }
706: else
707: {
1.2 downsj 708: line_update(bufferline, linebuf, 0, linenum + Header_lines);
1.1 downsj 709: }
710: }
711:
1.2 downsj 712: void u_endscreen(hi)
1.1 downsj 713:
714: register int hi;
715:
716: {
717: register int screen_line = hi + Header_lines;
718: register int i;
719:
720: if (smart_terminal)
721: {
722: if (hi < last_hi)
723: {
724: /* need to blank the remainder of the screen */
725: /* but only if there is any screen left below this line */
726: if (lastline + 1 < screen_length)
727: {
728: /* efficiently move to the end of currently displayed info */
729: if (screen_line - lastline < 5)
730: {
731: while (lastline < screen_line)
732: {
733: putchar('\n');
734: lastline++;
735: }
736: }
737: else
738: {
739: Move_to(0, screen_line);
740: lastline = screen_line;
741: }
742:
743: if (clear_to_end)
744: {
745: /* we can do this the easy way */
746: putcap(clear_to_end);
747: }
748: else
749: {
750: /* use clear_eol on each line */
751: i = hi;
752: while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi)
753: {
754: putchar('\n');
755: }
756: }
757: }
758: }
759: last_hi = hi;
760:
761: /* move the cursor to a pleasant place */
762: Move_to(x_idlecursor, y_idlecursor);
763: lastline = y_idlecursor;
764: }
765: else
766: {
767: /* separate this display from the next with some vertical room */
768: fputs("\n\n", stdout);
769: }
770: }
771:
1.2 downsj 772: void display_header(t)
1.1 downsj 773:
774: int t;
775:
776: {
777: if (t)
778: {
779: header_status = ON;
780: }
781: else if (header_status == ON)
782: {
783: header_status = ERASE;
784: }
785: }
786:
787: /*VARARGS2*/
1.2 downsj 788: void new_message(type, msgfmt, a1, a2, a3)
1.1 downsj 789:
790: int type;
791: char *msgfmt;
792: caddr_t a1, a2, a3;
793:
794: {
795: register int i;
796:
797: /* first, format the message */
798: (void) snprintf(next_msg, sizeof(next_msg), msgfmt, a1, a2, a3);
799:
800: if (msglen > 0)
801: {
802: /* message there already -- can we clear it? */
803: if (!overstrike)
804: {
805: /* yes -- write it and clear to end */
806: i = strlen(next_msg);
807: if ((type & MT_delayed) == 0)
808: {
809: type & MT_standout ? standout(next_msg) :
810: fputs(next_msg, stdout);
811: (void) clear_eol(msglen - i);
812: msglen = i;
813: next_msg[0] = '\0';
814: }
815: }
816: }
817: else
818: {
819: if ((type & MT_delayed) == 0)
820: {
821: type & MT_standout ? standout(next_msg) : fputs(next_msg, stdout);
822: msglen = strlen(next_msg);
823: next_msg[0] = '\0';
824: }
825: }
826: }
827:
1.2 downsj 828: void clear_message()
1.1 downsj 829:
830: {
831: if (clear_eol(msglen) == 1)
832: {
833: putchar('\r');
834: }
835: }
836:
1.2 downsj 837: int readline(buffer, size, numeric)
1.1 downsj 838:
839: char *buffer;
840: int size;
841: int numeric;
842:
843: {
844: register char *ptr = buffer;
845: register char ch;
846: register char cnt = 0;
847: register char maxcnt = 0;
848:
849: /* allow room for null terminator */
850: size -= 1;
851:
852: /* read loop */
853: while ((fflush(stdout), read(0, ptr, 1) > 0))
854: {
855: /* newline means we are done */
856: if ((ch = *ptr) == '\n')
857: {
858: break;
859: }
860:
861: /* handle special editing characters */
862: if (ch == ch_kill)
863: {
864: /* kill line -- account for overstriking */
865: if (overstrike)
866: {
867: msglen += maxcnt;
868: }
869:
870: /* return null string */
871: *buffer = '\0';
872: putchar('\r');
873: return(-1);
874: }
875: else if (ch == ch_erase)
876: {
877: /* erase previous character */
878: if (cnt <= 0)
879: {
880: /* none to erase! */
881: putchar('\7');
882: }
883: else
884: {
885: fputs("\b \b", stdout);
886: ptr--;
887: cnt--;
888: }
889: }
890: /* check for character validity and buffer overflow */
891: else if (cnt == size || (numeric && !isdigit(ch)) ||
892: !isprint(ch))
893: {
894: /* not legal */
895: putchar('\7');
896: }
897: else
898: {
899: /* echo it and store it in the buffer */
900: putchar(ch);
901: ptr++;
902: cnt++;
903: if (cnt > maxcnt)
904: {
905: maxcnt = cnt;
906: }
907: }
908: }
909:
910: /* all done -- null terminate the string */
911: *ptr = '\0';
912:
913: /* account for the extra characters in the message area */
914: /* (if terminal overstrikes, remember the furthest they went) */
915: msglen += overstrike ? maxcnt : cnt;
916:
917: /* return either inputted number or string length */
918: putchar('\r');
919: return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt);
920: }
921:
922: /* internal support routines */
923:
924: static int string_count(pp)
925:
926: register char **pp;
927:
928: {
929: register int cnt;
930:
931: cnt = 0;
932: while (*pp++ != NULL)
933: {
934: cnt++;
935: }
936: return(cnt);
937: }
938:
1.3 ! millert 939: static void summary_format(str, siz, numbers, names)
1.1 downsj 940:
941: char *str;
1.3 ! millert 942: size_t siz;
1.1 downsj 943: int *numbers;
944: register char **names;
945:
946: {
947: register int num;
948: register char *thisname;
949:
1.3 ! millert 950: if (siz == 0)
! 951: return;
! 952:
1.1 downsj 953: /* format each number followed by its string */
1.3 ! millert 954: *str = '\0';
1.1 downsj 955: while ((thisname = *names++) != NULL)
956: {
957: /* get the number to format */
958: num = *numbers++;
959:
960: /* display only non-zero numbers */
961: if (num > 0)
962: {
963: /* is this number in kilobytes? */
964: if (thisname[0] == 'K')
965: {
966: /* yes: format it as a memory value */
1.3 ! millert 967: strlcat(str, format_k(num), siz);
1.1 downsj 968:
969: /* skip over the K, since it was included by format_k */
1.3 ! millert 970: strlcat(str, thisname+1, siz);
1.1 downsj 971: }
972: else
973: {
1.3 ! millert 974: strlcat(str, itoa(num), siz);
! 975: strlcat(str, thisname, siz);
1.1 downsj 976: }
977: }
978:
979: /* ignore negative numbers, but display corresponding string */
980: else if (num < 0)
981: {
1.3 ! millert 982: strlcat(str, thisname, siz);
1.1 downsj 983: }
984: }
985:
986: /* if the last two characters in the string are ", ", delete them */
1.3 ! millert 987: thisname = str + strlen(str) - 2;
! 988: if (thisname >= str && thisname[0] == ',' && thisname[1] == ' ')
1.1 downsj 989: {
1.3 ! millert 990: *thisname = '\0';
1.1 downsj 991: }
992: }
993:
994: static void line_update(old, new, start, line)
995:
996: register char *old;
997: register char *new;
998: int start;
999: int line;
1000:
1001: {
1002: register int ch;
1003: register int diff;
1004: register int newcol = start + 1;
1005: register int lastcol = start;
1006: char cursor_on_line = No;
1007: char *current;
1008:
1009: /* compare the two strings and only rewrite what has changed */
1010: current = old;
1011: #ifdef DEBUG
1012: fprintf(debug, "line_update, starting at %d\n", start);
1013: fputs(old, debug);
1014: fputc('\n', debug);
1015: fputs(new, debug);
1016: fputs("\n-\n", debug);
1017: #endif
1018:
1019: /* start things off on the right foot */
1020: /* this is to make sure the invariants get set up right */
1021: if ((ch = *new++) != *old)
1022: {
1023: if (line - lastline == 1 && start == 0)
1024: {
1025: putchar('\n');
1026: }
1027: else
1028: {
1029: Move_to(start, line);
1030: }
1031: cursor_on_line = Yes;
1032: putchar(ch);
1033: *old = ch;
1034: lastcol = 1;
1035: }
1036: old++;
1037:
1038: /*
1039: * main loop -- check each character. If the old and new aren't the
1040: * same, then update the display. When the distance from the
1041: * current cursor position to the new change is small enough,
1042: * the characters that belong there are written to move the
1043: * cursor over.
1044: *
1045: * Invariants:
1046: * lastcol is the column where the cursor currently is sitting
1047: * (always one beyond the end of the last mismatch).
1048: */
1049: do /* yes, a do...while */
1050: {
1051: if ((ch = *new++) != *old)
1052: {
1053: /* new character is different from old */
1054: /* make sure the cursor is on top of this character */
1055: diff = newcol - lastcol;
1056: if (diff > 0)
1057: {
1058: /* some motion is required--figure out which is shorter */
1059: if (diff < 6 && cursor_on_line)
1060: {
1061: /* overwrite old stuff--get it out of the old buffer */
1062: printf("%.*s", diff, ¤t[lastcol-start]);
1063: }
1064: else
1065: {
1066: /* use cursor addressing */
1067: Move_to(newcol, line);
1068: cursor_on_line = Yes;
1069: }
1070: /* remember where the cursor is */
1071: lastcol = newcol + 1;
1072: }
1073: else
1074: {
1075: /* already there, update position */
1076: lastcol++;
1077: }
1078:
1079: /* write what we need to */
1080: if (ch == '\0')
1081: {
1082: /* at the end--terminate with a clear-to-end-of-line */
1083: (void) clear_eol(strlen(old));
1084: }
1085: else
1086: {
1087: /* write the new character */
1088: putchar(ch);
1089: }
1090: /* put the new character in the screen buffer */
1091: *old = ch;
1092: }
1093:
1094: /* update working column and screen buffer pointer */
1095: newcol++;
1096: old++;
1097:
1098: } while (ch != '\0');
1099:
1100: /* zero out the rest of the line buffer -- MUST BE DONE! */
1101: diff = display_width - newcol;
1102: if (diff > 0)
1103: {
1.2 downsj 1104: memset(old, 0, diff);
1.1 downsj 1105: }
1106:
1107: /* remember where the current line is */
1108: if (cursor_on_line)
1109: {
1110: lastline = line;
1111: }
1112: }
1113:
1114: /*
1115: * printable(str) - make the string pointed to by "str" into one that is
1116: * printable (i.e.: all ascii), by converting all non-printable
1117: * characters into '?'. Replacements are done in place and a pointer
1118: * to the original buffer is returned.
1119: */
1120:
1121: char *printable(str)
1122:
1123: char *str;
1124:
1125: {
1126: register char *ptr;
1127: register char ch;
1128:
1129: ptr = str;
1130: while ((ch = *ptr) != '\0')
1131: {
1132: if (!isprint(ch))
1133: {
1134: *ptr = '?';
1135: }
1136: ptr++;
1137: }
1138: return(str);
1139: }
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