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- /***************************************************************************
- * This program is Copyright (C) 1986, 1987, 1988 by Jonathan Payne. JOVE *
- * is provided to you without charge, and with no warranty. You may give *
- * away copies of JOVE, including sources, provided that this notice is *
- * included in all the files. *
- ***************************************************************************/
-
- #include "jove.h"
- #include "ctype.h"
- #include "termcap.h"
- #include <signal.h>
-
- #ifdef MAC
- # include "mac.h"
- #else
- # include <varargs.h>
- #endif
-
- #ifdef MSDOS
- #include <time.h>
- #endif
-
- struct cmd *
- FindCmd(proc)
- register void (*proc)();
- {
- register struct cmd *cp;
-
- for (cp = commands; cp->Name; cp++)
- if (cp->c_proc == proc)
- return cp;
- return 0;
- }
-
- int Interactive; /* True when we invoke with the command handler? */
- data_obj *LastCmd;
- char *ProcFmt = ": %f ";
-
- void
- ExecCmd(cp)
- data_obj *cp;
- {
- LastCmd = cp;
- if (cp->Type & MAJOR_MODE)
- SetMajor((cp->Type >> 8));
- else if (cp->Type & MINOR_MODE)
- TogMinor((cp->Type >> 8));
- else switch (cp->Type&TYPEMASK) {
- case MACRO:
- do_macro((struct macro *) cp);
- break;
-
- case FUNCTION:
- {
- struct cmd *cmd = (struct cmd *) cp;
-
- if (cmd->c_proc)
- (*cmd->c_proc)();
- }
- }
- }
-
- Line *
- lastline(lp)
- register Line *lp;
- {
- register Line *next;
-
- while (next = lp->l_next)
- lp = next;
- return lp;
- }
-
- private int *slowp = 0;
-
- char key_strokes[100];
- private char *key_p = key_strokes;
-
- void
- init_strokes()
- {
- key_strokes[0] = 0;
- key_p = key_strokes;
- }
-
- void
- add_stroke(c)
- {
- if (key_p + 5 > &key_strokes[(sizeof key_strokes) - 1])
- key_p = key_strokes;
- sprintf(key_p, "%p ", c);
- key_p += strlen(key_p);
- }
-
- void
- slowpoke()
- {
- if (slowp)
- *slowp = YES;
- f_mess(key_strokes);
- }
-
- #ifdef UNIX
- #ifdef BSD4_2
- # define N_SEC 1 /* will be precisely 1 second on 4.2 */
- #else
- # define N_SEC 2 /* but from 1 to 2 seconds otherwise */
- #endif
- #else /* MSDOS or MAC */
- #define N_SEC 1
- int in_macro();
- #endif /* UNIX */
-
- int
- waitchar(slow)
- int *slow;
- {
- #ifdef UNIX
- #ifdef EUNICE
- return getch();
- #endif
- unsigned int old_time;
- int c;
- int (*oldproc)();
- #else /* MSDOS or MAC */
- long sw, time();
- #endif /* UNIX */
-
- slowp = slow;
- if (slow)
- *slow = NO;
- #ifdef UNIX
- oldproc = signal(SIGALRM, slowpoke);
-
- if ((old_time = alarm((unsigned) N_SEC)) == 0)
- old_time = UpdFreq;
- c = getch();
- (void) alarm(old_time);
- (void) signal(SIGALRM, oldproc);
-
- return c;
- #else /* MSDOS or MAC */
- #ifdef MAC
- Keyonly = 1;
- if(charp() || in_macro()) return getch(); /* to avoid flicker */
- #endif
- time(&sw);
- sw += N_SEC;
- while(time(NULL) <= sw)
- if (charp() || in_macro())
- return getch();
- #ifdef MAC
- menus_off();
- #endif
- slowpoke();
- return getch();
- #endif /* UNIX */
- }
-
- /* dir > 0 means forward; else means backward. */
-
- char *
- StrIndex(dir, buf, charpos, what)
- char *buf,
- what;
- {
- char *cp = &buf[charpos],
- c;
-
- if (dir > 0) {
- while (c = *cp++)
- if (c == what)
- return (cp - 1);
- } else {
- while (cp >= buf && (c = *cp--))
- if (c == what)
- return (cp + 1);
- }
- return 0;
- }
-
- int
- blnkp(buf)
- register char *buf;
- {
- register char c;
-
- while ((c = *buf++) && (c == ' ' || c == '\t'))
- ;
- return c == 0; /* It's zero if we got to the end of the Line */
- }
-
- Line *
- next_line(line, num)
- register Line *line;
- register int num;
- {
- if (num < 0)
- return prev_line(line, -num);
- if (line)
- while (--num >= 0 && line->l_next != 0)
- line = line->l_next;
- return line;
- }
-
- Line *
- prev_line(line, num)
- register Line *line;
- register int num;
- {
- if (num < 0)
- return next_line(line, -num);
- if (line)
- while (--num >= 0 && line->l_prev != 0)
- line = line->l_prev;
- return line;
- }
-
- void
- DotTo(line, col)
- Line *line;
- {
- Bufpos bp;
-
- bp.p_line = line;
- bp.p_char = col;
- SetDot(&bp);
- }
-
- /* If bp->p_line is != current line, then save current line. Then set dot
- to bp->p_line, and if they weren't equal get that line into linebuf. */
-
- void
- SetDot(bp)
- register Bufpos *bp;
- {
- register int notequal;
-
- if (bp == 0)
- return;
-
- notequal = bp->p_line != curline;
- if (notequal)
- lsave();
- if (bp->p_line)
- curline = bp->p_line;
- if (notequal)
- getDOT();
- curchar = bp->p_char;
- if (curchar > length(curline))
- curchar = length(curline);
- }
-
- void
- ToLast()
- {
- SetLine(curbuf->b_last);
- Eol();
- }
-
- int MarkThresh = 22; /* average screen size ... */
- static int line_diff;
-
- int
- LineDist(nextp, endp)
- register Line *nextp,
- *endp;
- {
- (void) inorder(nextp, 0, endp, 0);
- return line_diff;
- }
-
- int
- inorder(nextp, char1, endp, char2)
- register Line *nextp,
- *endp;
- {
- int count = 0;
- register Line *prevp = nextp;
-
- line_diff = 0;
- if (nextp == endp)
- return char1 < char2;
-
- while (nextp || prevp) {
- if (nextp == endp || prevp == endp)
- break;
- if (nextp)
- nextp = nextp->l_next;
- if (prevp)
- prevp = prevp->l_prev;
- count += 1;
- }
- if (nextp == 0 && prevp == 0)
- return -1;
- line_diff = count;
-
- return nextp == endp;
- }
-
- void
- PushPntp(line)
- register Line *line;
- {
- if (LineDist(curline, line) >= MarkThresh)
- set_mark();
- }
-
- void
- ToFirst()
- {
- SetLine(curbuf->b_first);
- }
-
- int
- length(line)
- Line *line;
- {
- return strlen(lcontents(line));
- };
-
- void
- to_word(dir)
- register int dir;
- {
- register char c;
-
- if (dir == FORWARD) {
- while ((c = linebuf[curchar]) != 0 && !isword(c))
- curchar += 1;
- if (eolp()) {
- if (curline->l_next == 0)
- return;
- SetLine(curline->l_next);
- to_word(dir);
- return;
- }
- } else {
- while (!bolp() && (c = linebuf[curchar - 1], !isword(c)))
- curchar -= 1;
- if (bolp()) {
- if (curline->l_prev == 0)
- return;
- SetLine(curline->l_prev);
- Eol();
- to_word(dir);
- }
- }
- }
-
- /* Are there any modified buffers? Allp means include B_PROCESS
- buffers in the check. */
-
- int
- ModBufs(allp)
- {
- register Buffer *b;
-
- for (b = world; b != 0; b = b->b_next) {
- if (b->b_type == B_SCRATCH)
- continue;
- if ((b->b_type == B_FILE || allp) && IsModified(b))
- return 1;
- }
- return 0;
- }
-
- char *
- filename(b)
- register Buffer *b;
- {
- return b->b_fname ? pr_name(b->b_fname, YES) : "[No file]";
- }
-
- char *
- itoa(num)
- register int num;
- {
- static char line[15];
-
- sprintf(line, "%d", num);
- return line;
- }
-
- int
- min(a, b)
- register int a,
- b;
- {
- return (a < b) ? a : b;
- }
-
- int
- max(a, b)
- register int a,
- b;
- {
- return (a > b) ? a : b;
- }
-
- void
- tiewind(w, bp)
- register Window *w;
- register Buffer *bp;
- {
- int not_tied = (w->w_bufp != bp);
-
- UpdModLine = YES; /* kludge ... but speeds things up considerably */
- w->w_line = bp->b_dot;
- w->w_char = bp->b_char;
- w->w_bufp = bp;
- if (not_tied)
- CalcWind(w); /* ah, this has been missing since the
- beginning of time! */
- }
-
- extern int Jr_Len;
-
- char *
- lcontents(line)
- register Line *line;
- {
- if (line == curline)
- return linebuf;
- else
- return lbptr(line);
- }
-
- char *
- ltobuf(line, buf)
- Line *line;
- char *buf;
- {
- if (line == curline) {
- if (buf != linebuf)
- strcpy(buf, linebuf);
- Jr_Len = strlen(linebuf);
- } else
- getline(line->l_dline, buf);
- return buf;
- }
-
- void
- DOTsave(buf)
- Bufpos *buf;
- {
- buf->p_line = curline;
- buf->p_char = curchar;
- }
-
- /* Return none-zero if we had to rearrange the order. */
-
- int
- fixorder(line1, char1, line2, char2)
- register Line **line1,
- **line2;
- register int *char1,
- *char2;
- {
- Line *tline;
- int tchar;
-
- if (inorder(*line1, *char1, *line2, *char2))
- return 0;
-
- tline = *line1;
- tchar = *char1;
- *line1 = *line2;
- *char1 = *char2;
- *line2 = tline;
- *char2 = tchar;
-
- return 1;
- }
-
- int
- inlist(first, what)
- register Line *first,
- *what;
- {
- while (first) {
- if (first == what)
- return 1;
- first = first->l_next;
- }
- return 0;
- }
-
- /* Make `buf' (un)modified and tell the redisplay code to update the modeline
- if it will need to be changed. */
-
- int ModCount = 0;
-
- void
- modify()
- {
- extern int DOLsave;
-
- if (!curbuf->b_modified) {
- UpdModLine = YES;
- curbuf->b_modified = YES;
- }
- DOLsave = YES;
- if (!Asking)
- ModCount += 1;
- }
-
- void
- unmodify()
- {
- if (curbuf->b_modified) {
- UpdModLine = YES;
- curbuf->b_modified = NO;
- }
- }
-
- int
- numcomp(s1, s2)
- register char *s1,
- *s2;
- {
- register int count = 0;
-
- while (*s1 != 0 && *s1++ == *s2++)
- count += 1;
- return count;
- }
-
- char *
- copystr(str)
- char *str;
- {
- char *val;
-
- if (str == 0)
- return 0;
- val = emalloc(strlen(str) + 1);
-
- strcpy(val, str);
- return val;
- }
-
- #ifndef byte_copy
- void
- byte_copy(from, to, count)
- register char *from,
- *to;
- register int count;
- {
- while (--count >= 0)
- *to++ = *from++;
- }
- #endif
-
- void
- len_error(flag)
- {
- char *mesg = "[line too long]";
-
- if (flag == COMPLAIN) complain(mesg);
- else error(mesg);
- }
-
- /* Insert num number of c's at offset atchar in a linebuf of LBSIZE */
-
- void
- ins_c(c, buf, atchar, num, max)
- char c, *buf;
- {
- register char *pp, *pp1;
- register int len;
- int numchars; /* number of characters to copy forward */
-
- if (num <= 0)
- return;
- len = atchar + strlen(&buf[atchar]);
- if (len + num >= max)
- len_error(COMPLAIN);
- pp = &buf[len + 1]; /* + 1 so we can --pp (not pp--) */
- pp1 = &buf[len + num + 1];
- numchars = len - atchar;
- while (numchars-- >= 0)
- *--pp1 = *--pp;
- pp = &buf[atchar];
- while (--num >= 0)
- *pp++ = c;
- }
-
- int
- TwoBlank()
- {
- register Line *next = curline->l_next;
-
- return ((next != 0) &&
- (*(lcontents(next)) == '\0') &&
- (next->l_next != 0) &&
- (*(lcontents(next->l_next)) == '\0'));
- }
-
- void
- linecopy(onto, atchar, from)
- register char *onto,
- *from;
- {
- register char *endp = &onto[LBSIZE - 2];
-
- onto += atchar;
-
- while (*onto = *from++)
- if (onto++ >= endp)
- len_error(ERROR);
- }
-
- char *
- IOerr(err, file)
- char *err, *file;
- {
- return sprint("Couldn't %s \"%s\".", err, file);
- }
-
- #ifdef UNIX
- void
- pclose(p)
- int *p;
- {
- (void) close(p[0]);
- (void) close(p[1]);
- }
-
- void
- dopipe(p)
- int p[];
- {
- if (pipe(p) == -1)
- complain("[Pipe failed]");
- }
-
- #endif /* UNIX */
- /* NOSTRICT */
-
- char *
- emalloc(size)
- {
- register char *ptr;
-
- if (ptr = malloc((unsigned) size))
- return ptr;
- /* Try garbage collecting lines */
- GCchunks();
- if (ptr = malloc((unsigned) size))
- return ptr;
- /* Uh ... Oh screw it! */
- error("[Out of memory] ");
- /* NOTREACHED */
- }
-
- /* Return the basename of file F. */
-
- char *
- basename(f)
- register char *f;
- {
- register char *cp;
-
- if (cp = rindex(f, '/'))
- return cp + 1;
- else
- #ifdef MSDOS
- if (cp = rindex(f, '\\'))
- return cp + 1;
- else
- if (cp = rindex(f, ':'))
- return cp + 1;
- #endif /* MSDOS */
- return f;
- }
-
- void
- push_env(savejmp)
- jmp_buf savejmp;
- {
- byte_copy((char *) mainjmp, (char *) savejmp, sizeof (jmp_buf));
- }
-
- void
- pop_env(savejmp)
- jmp_buf savejmp;
- {
- byte_copy((char *) savejmp, (char *) mainjmp, sizeof (jmp_buf));
- }
-
- #ifdef LOAD_AV
- # if defined(BSD4_2) && !defined(BSD2_10)
- # if defined(PURDUE_EE) && (defined(vax) || defined(gould))
-
- void
- get_la(dp)
- double *dp;
- {
- *dp = (double) loadav(0) / 100.0;
- }
-
- # else /* !PURDUE_EE || (!vax && !gould) */
-
- #ifdef sun
- # include <sys/param.h>
- #endif
- #include <nlist.h>
-
- static struct nlist nl[] = {
- { "_avenrun" },
- #define X_AVENRUN 0
- { "" }
- };
-
- void
- get_la(dp)
- double *dp;
- {
- #ifdef sun
- long avenrun[3];
- #else
- double avenrun[3];
- #endif
- static int kmem = 0;
-
- if (kmem == -1) {
- *dp = 4.0; /* So shell commands will say "Chugging" */
- return;
- } else if (kmem == 0) {
- if ((kmem = open("/dev/kmem", 0)) == -1) {
- f_mess("Can't open kmem for load average.");
- *dp = 4.0;
- return;
- }
- nlist("/vmunix", nl);
- }
- lseek(kmem, (long) nl[X_AVENRUN].n_value, 0);
- read(kmem, (char *) avenrun, sizeof(avenrun));
- #ifdef sun
- *dp = (double) avenrun[0] / FSCALE;
- #else
- *dp = avenrun[0];
- #endif
- }
-
- # endif
- # else /* !BSD4_2 || BSD2_10 */
-
- void
- get_la(dp)
- double *dp;
- {
- short avg[3];
-
- gldav(avg);
- *dp = (double) avg[0] / 256;
- }
-
- # endif
- #endif /* LOAD_AV */
-
- /* get the time buf, designated by *timep, from FROM to TO. */
- char *
- get_time(timep, buf, from, to)
- char *buf;
- time_t *timep;
- {
- time_t now;
- char *cp;
- extern char *ctime();
-
- if (timep != 0)
- now = *timep;
- else
- (void) time(&now);
- cp = ctime(&now) + from;
- #ifndef MSDOS
- if (to == -1)
- #else /* MSDOS */
- if ((to == -1) && (cp[strlen(cp)-1] == '\n'))
- #endif /* MSDOS */
- cp[strlen(cp) - 1] = '\0'; /* Get rid of \n */
- else
- cp[to - from] = '\0';
- if (buf) {
- strcpy(buf, cp);
- return buf;
- } else
- return cp;
- }
-
- #ifndef MSDOS
- #ifndef MAC
- int
- strlen(s)
- register char *s;
- {
- register char *base = s;
-
- while (*s++)
- ;
- return (s - base) - 1;
- }
-
- char *
- index(s, c)
- register char *s;
- register int c;
- {
- register int c1;
-
- if (c != 0)
- while (c1 = *s++)
- if (c == c1)
- return s - 1;
- return 0;
- }
-
- int
- strcmp(s1, s2)
- register char *s1,
- *s2;
- {
- if (!s1 || !s2)
- return 1; /* which is not zero ... */
- while (*s1 == *s2++)
- if (*s1++ == '\0')
- return 0;
- return (*s1 - *--s2);
- }
-
- #endif /* MAC */
- #endif /* MSDOS */
-
- int
- casecmp(s1, s2)
- register char *s1,
- *s2;
- {
- if (!s1 || !s2)
- return 1; /* which is not zero ... */
- while (CharUpcase(*s1) == CharUpcase(*s2++))
- if (*s1++ == '\0')
- return 0;
- return (*s1 - *--s2);
- }
-
- int
- casencmp(s1, s2, n)
- register char *s1,
- *s2;
- register int n;
- {
- if (!s1 || !s2)
- return 1; /* which is not zero ... */
- while (--n >= 0 && (CharUpcase(*s1) == CharUpcase(*s2++)))
- if (*s1++ == '\0')
- return 0;
- return ((n < 0) ? 0 : *s1 - *--s2);
- }
-
- void
- null_ncpy(to, from, n)
- char *to,
- *from;
- {
- (void) strncpy(to, from, n);
- to[n] = '\0';
- }
-
- #ifndef MSDOS
- #ifndef MAC
- void
- strcpy(t, f)
- register char *t,
- *f;
- {
- while (*t++ = *f++)
- ;
- }
-
- #endif /* MAC */
- #endif /* MSDOS */
-
- /* Tries to pause for delay/10 seconds OR until a character is typed
- at the keyboard. This works well on BSD4_2 and not so well on the
- rest. Returns 1 if it returned because of keyboard input, or 0
- otherwise. */
-
- #ifdef MAC
- void
- SitFor(delay)
- unsigned int delay;
- {
- long start,
- end;
-
- #define Ticks (long *) 0x16A /* 1/60 sec */
- Keyonly = 1;
- redisplay();
- start = *Ticks;
-
- end = start + delay * 6;
- do
- if (InputPending = charp())
- break;
- while (*Ticks < end);
- }
- #else /* not MAC */
-
- void
- SitFor(delay)
- unsigned int delay;
- {
- #ifndef MSDOS
- #if defined(BSD4_2) && !defined(BSD2_10)
- #include <sys/time.h>
-
- struct timeval timer;
- long readfds = 1;
-
- timer.tv_sec = (delay / 10);
- timer.tv_usec = (delay % 10) * 100000;
-
- if (charp())
- return;
- /* gross that I had to snarf this from getch() */
- if (!UpdMesg && !Asking) { /* Don't erase if we are asking */
- if (mesgbuf[0] && !errormsg)
- message(NullStr);
- }
- redisplay();
- select(1, &readfds, (long *)0, (long *)0, &timer);
- #else
- static int cps[] = {
- 0,
- 5,
- 7,
- 11,
- 13,
- 15,
- 20,
- 30,
- 60,
- 120,
- 180,
- 240,
- 480,
- 960,
- 1920,
- 1920,
- };
- register int nchars,
- check_cnt;
-
- if (charp())
- return;
- nchars = (delay * cps[ospeed]) / 10;
- check_cnt = BufSize;
- redisplay();
- while ((--nchars > 0) && !InputPending) {
- putchar(0);
- if (--check_cnt == 0) {
- check_cnt = BufSize;
- InputPending = charp();
- }
- }
- #endif
- #else /* MSDOS */
- #include <bios.h>
- #include <dos.h>
-
- long start,
- end;
- #ifndef IBMPC
- struct dostime_t tc;
- #endif
-
- redisplay();
- #ifdef IBMPC
- _bios_timeofday(_TIME_GETCLOCK, &start);
- #else
- _dos_gettime(&tc);
- start = (long)(tc.hour*60L*60L*10L)+(long)(tc.minute*60L*10L)+
- (long)(tc.second*10)+(long)(tc.hsecond/10);
- #endif
- end = (start + delay);
- do {
- if (InputPending = charp())
- break;
- #ifdef IBMPC
- if (_bios_timeofday(_TIME_GETCLOCK, &start))
- break; /* after midnight */
- #else
- start = (long)(tc.hour*60L*60L*10L)+(long)(tc.minute*60L*10L)+
- (long)(tc.second*10)+(long)(tc.hsecond/10);
- #endif
- }
- while (start < end);
- #endif /* MSDOS */
- }
- #endif /* MAC */
-
- int
- sindex(pattern, string)
- register char *pattern,
- *string;
- {
- register int len = strlen(pattern);
-
- while (*string != '\0') {
- if (*pattern == *string && strncmp(pattern, string, len) == 0)
- return TRUE;
- string += 1;
- }
- return FALSE;
- }
-
- void
- make_argv(argv, ap)
- register char *argv[];
- va_list ap;
- {
- register char *cp;
- register int i = 0;
-
- argv[i++] = va_arg(ap, char *);
- argv[i++] = basename(argv[0]);
- while (cp = va_arg(ap, char *))
- argv[i++] = cp;
- argv[i] = 0;
- }
-
- int
- pnt_line()
- {
- register Line *lp = curbuf->b_first;
- register int i;
-
- for (i = 0; lp != 0; i++, lp = lp->l_next)
- if (lp == curline)
- break;
- return i + 1;
- }
-