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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. *
- ***************************************************************************/
- #ifdef OS2
- #define INCL_BASE
- #include <os2.h>
- #endif
-
-
- #define UTIL
- #include "jove.h"
- #include "ctype.h"
- #include "termcap.h"
- #include "disp.h"
- #include "fp.h"
- #include <signal.h>
-
- #ifdef MAC
- #include "mac.h"
- #else
- #ifdef STDARGS
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
- #endif
-
- #ifdef MSDOS
- #include <time.h>
- #endif
-
- const struct cmd *
- FindCmd(proc)
- register void (*proc) proto((void));
- {
- register const 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 _fastcall ExecCmd (struct 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:
- {
- register struct cmd *cmd = (struct cmd *) cp;
-
- if (cmd->c_proc) {
- if ((cmd->Type & MODIFIER) &&
- (BufMinorMode(curbuf, ReadOnly))) {
- rbell();
- message("[Buffer is read-only]");
- } else
- (*cmd->c_proc) ();
- }
- }
- }
- }
-
- /**********************************/
- Line *lastline( register Line *lp )
- /**********************************/
- {
- register Line *next;
-
- while ((next = lp->l_next) != NULL)
- lp = next;
- return lp;
- }
-
- char key_strokes[100], *keys_p = key_strokes;
-
- void pp_key_strokes(buffer, size)
- char *buffer;
- size_t size;
- {
- char *buf_end = buffer + size - 5, /* leave some extra space */
- *kp = key_strokes, c;
-
- *buffer = '\0';
- while ((c = *kp++) != '\0') {
- swritef(buffer, "%p ", c);
- buffer += strlen(buffer);
- if (buffer > buf_end)
- break;
- }
- }
-
- private int *slowp = 0; /* for waitchar() */
-
- private SIGRESULT
- slowpoke(junk)
- int junk;
- {
- char buffer[100];
-
- if (slowp)
- *slowp = YES;
- pp_key_strokes(buffer, sizeof(buffer));
- f_mess (buffer);
- SIGRETURN;
- }
-
- #define N_SEC 1
- int in_macro();
-
- /*********************************/
- int _fastcall waitchar (int *slow)
- /*********************************/
- {
- int c;
- long sleep_time = 1000L;
- long sleep_interval = 100L;
- int _fastcall get_ch(void);
-
- slowp = slow;
-
- if (in_macro()) /* make macros faster ... */
- return get_ch();
-
- /* If slow is a valid pointer and it's value is yes, then
- we know we have already been slow during this sequence,
- so we just wait for the character and then echo it. */
- if (slow != 0 && *slow == YES) {
- c = get_ch();
- slowpoke(0);
- return c;
- }
- while (sleep_time >= 0) {
- if (charp() || in_macro())
- return (get_ch());
- DosSleep(sleep_interval);
- sleep_time -= sleep_interval;
- }
- slowpoke ();
- c = get_ch ();
- slowpoke ();
-
- return c;
- }
-
- /* dir > 0 means forward; else means backward. */
-
- char *
- StrIndex(dir, buf, charpos, what)
- int dir;
- register char *buf;
- int charpos;
- register int what;
- {
- /* register */ char *cp = &buf[charpos];
- /* register */ int c;
-
- if (dir > 0) {
- while ((c = *cp++) != '\0')
- if ((c == what) != '\0')
- return (cp - 1);
- } else {
- while (cp >= buf && (c = *cp--) != '\0')
- if (c == what)
- return (cp + 1);
- }
- return 0;
- }
-
- int blnkp(buf)
- register char *buf;
- {
- /* register */ char c;
-
- while ((c = *buf++) != '\0' && (c == ' ' || c == '\t'));
- return c == 0; /* It's zero if we got to the end of the Line */
- }
- /***********************/
- int within_indent (void)
- /***********************/
- {
- /* register */ char c;
- /* register */ int i;
-
- i = curchar;
- while (--i >= 0 && ((c = linebuf[i]) == ' ' || c == '\t'));
- return (i < 0); /* it's < 0 if we got to the beginning */
- }
-
- /***********************************************/
- Line * next_line(Line *line, 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 *line, 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 _fastcall DotTo(Line *line, int col)
- /*****************************************/
- {
- 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 _fastcall SetDot (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 _fastcall ToLast(void)
- /***************************/
- {
- 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 char1, char2;
- {
- 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 _fastcall ToFirst(void)
- /****************************/
- {
- SetLine(curbuf->b_first);
- }
- /********************************/
- int _fastcall length(Line *line)
- /********************************/
- {
- return strlen(lcontents(line));
- }
- /***************************/
- void _fastcall to_word(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 _fastcall ModBufs(int 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 *_fastcall filename(Buffer *b)
- /***********************************/
- {
- return b->b_fname ? pr_name(b->b_fname, YES) : "[No file]";
- }
-
- char *
- itoa(num)
- /* register */ int num;
- {
- static char line[15];
-
- swritef(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! */
- }
-
- 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()
- {
- 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((size_t) (strlen(str) + 1));
-
- strcpy(val, str);
- return val;
- }
-
- #ifndef byte_copy
- void byte_copy(from, to, count)
- /* register */ char *from, *to;
- /* register */ size_t count;
- {
- while (count-- > 0)
- *to++ = *from++;
- }
-
- #endif
-
- void len_error(flag)
- int 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)
- int c;
- char *buf;
- int atchar, num, max;
- {
- /* 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;
- int atchar;
- {
- /* register */ char *endp = &onto[LBSIZE - 2];
-
- onto += atchar;
-
- while ((*onto = *from++) != '\0')
- if (onto++ >= endp)
- len_error(ERROR);
- }
-
- char *
- IOerr(err, file)
- char *err, *file;
- {
- return sprint("Couldn't %s \"%s\".", err, file);
- }
-
- #ifdef UNIX
- void dopipe(p)
- int *p;
- {
- if (pipe(p) == -1)
- complain("[Pipe failed]");
- }
-
- void pclose(p)
- int *p;
- {
- (void) close(p[0]);
- (void) close(p[1]);
- }
-
- #endif /* UNIX */
-
- /* NOSTRICT */
-
- char *
- emalloc(size)
- size_t size;
- {
- /* register */ char *ptr;
-
- if ((ptr = malloc(size)) != NULL)
- return ptr;
- /* Try garbage collecting lines */
- GCchunks();
- if ((ptr = malloc(size)) != NULL)
- 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 = strrchr(f, '/')) != NULL)
- return cp + 1;
- else
- #ifdef MSDOS
- if (cp = strrchr(f, '\\'))
- return cp + 1;
- else if (cp = strrchr(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", 0, 0, 0, 0},
- #define X_AVENRUN 0
- {"", 0, 0, 0, 0}
- };
-
- void get_la(dp)
- double *dp;
- {
- #ifdef sun
- long avenrun[3];
- #else
- double avenrun[3];
- #endif
- static int kmem = 0;
- extern long lseek proto((int, long, int));
-
- 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)
- time_t *timep;
- char *buf;
- int from, to;
- {
- 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;
- }
-
- 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 */ size_t n;
- {
- if (!s1 || !s2)
- return 1; /* which is not zero ... */
- for (;;) {
- if (n == 0)
- return 0;
- n--;
- if (CharUpcase(*s1) != CharUpcase(*s2++))
- return *s1 - *--s2;
- if (*s1++ == '\0')
- return 0;
- }
- }
-
- void null_ncpy(to, from, n)
- char *to, *from;
- size_t n;
- {
- (void) strncpy(to, from, n);
- to[n] = '\0';
- }
-
- /* 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. */
-
- /***********************/
- void SitFor (int delay)
- /***********************/
- {
- #include <dos.h>
-
- long start, end;
- DATETIME DateTime;
- unsigned long sleep_interval = 100L;
- unsigned long alarm_mls = delay * 100; /* delay in milliseconds */
- unsigned long sleep_time = 0L;
-
- redisplay();
- do {
- if (InputPending = charp())
- break;
- sleep_time += sleep_interval;
- DosSleep(sleep_interval);
- }
- while (sleep_time < alarm_mls);
- }
-
- int sindex(pattern, string)
- /* register */ char *pattern, *string;
- {
- /* register */ size_t 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 *)) != NULL)
- argv[i++] = cp;
- argv[i] = 0;
- }
-
- /******************/
- int pnt_line(void)
- /******************/
- {
- 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;
- }
-
- char *
- ralloc(obj, size)
- /* register */ char *obj;
- size_t size;
- {
- /* register */ char *new;
-
- if (obj)
- new = realloc(obj, size);
- if (new == 0 || !obj)
- new = emalloc(size);
- return new;
- }
-