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mse/src/docmd2.c

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/*
** docmd2.c
**
** routines to actually execute commands
**
** This file is part of mse, under GPLv3.
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "se.h"
#include "changetty.h"
#include "docmd1.h"
#include "docmd2.h"
#include "edit.h"
#include "extern.h"
#include "main.h"
#include "misc.h"
#include "pat.h"
#include "scratch.h"
#include "screen.h"
#include "term.h"
/* append --- append lines after "line" */
int append (int line, char str[])
{
char lin[MAXLINE];
char term;
int ret;
int len, i, dpos, dotseen;
Curln = line;
if (str[0] == ':') /* text to be added is in the command line */
ret = inject (&str[1]);
else
{
Cmdrow = Toprow + (Curln - Topln) + 1; /* 1 below Curln */
lin[0] = EOS;
if (Indent > 0 || line <= 0)
len = max (0, Indent - 1);
else /* do auto indent */
{
LINEDESC *k;
k = se_gettxt (line);
for (len = 0; Txt[len] == ' '; len++)
;
}
dpos = len; /* position for terminating '.' */
for (ret = NOSTATUS; ret == NOSTATUS; )
{
if (! hwinsdel()) /* do it the old, slow way */
{
if (Cmdrow > Botrow)
{
Cmdrow = Toprow + 1;
cprow (Botrow, Toprow);
adjust_window (Curln, Curln);
if (First_affected > Topln)
First_affected = Topln;
}
clrrow (Cmdrow);
if (Cmdrow < Botrow)
clrrow (Cmdrow + 1);
}
else /* try to be smart about it */
{
if (Cmdrow > Botrow)
{
Cmdrow--;
dellines (Toprow, 1);
inslines (Cmdrow, 1);
Topln++;
}
else
{
dellines (Botrow, 1);
inslines (Cmdrow, 1);
}
}
prompt ("apd>");
do
getcmd (lin, Firstcol, &len, &term);
while (term == CURSOR_UP || term == CURSOR_DOWN
|| term == CURSOR_SAME);
dotseen = 0;
if (lin[0] == '.' && lin[1] == '\n' && lin[2] == EOS)
dotseen = 1;
for (i = 0; i < dpos && lin[i] == ' '; i++)
;
if (i == dpos && lin[dpos] == '.' && lin[dpos + 1] == '\n'
&& lin[dpos+2] == EOS)
dotseen = 1;
if (dotseen)
{
if (hwinsdel())
{
dellines (Cmdrow, 1);
inslines (Botrow, 1);
}
ret = OK;
}
else if (inject (lin) == ERR)
ret = ERR;
else /* inject occured */
prompt (""); /* erase prompt */
Cmdrow++;
if (term != FUNNY)
{
if (Indent > 0)
len = Indent - 1;
else /* do auto indent */
for (len = 0; lin[len] == ' '; len++)
;
dpos = len;
lin[0] = EOS;
}
}
Cmdrow = Botrow + 1;
if (hwinsdel()) /* since we take control */
{ /* of the screen, we're sure */
Sctop = Topln; /* it's still OK */
for (i = 0; i < Sclen; i++)
Scline[i] = Sctop + i <= Lastln ? i : -1;
}
}
if (Curln == 0 && Lastln > 0) /* for 0a or 1i followed by "." */
Curln = 1;
if (First_affected > line)
First_affected = line;
tflush ();
return (ret);
}
/* copy --- copy line1 through line2 after line3 */
int copy (int line3)
{
int i;
int ret;
LINEDESC *ptr3, *after3, *k;
ret = ERR;
if (Line1 <= 0)
Errcode = EORANGE;
else
{
ret = OK;
Curln = line3;
k = getind (Line1);
for (i = Line1; i <= Line2; i++)
{
gtxt (k);
if (inject (Txt) == ERR || intrpt ())
{
ret = ERR;
break;
}
if (Line1 < line3)
k++;
else
k += 2;
/*
* inject calls blkmove, which will shift the
* lines down one in the array, so we add two
* instead of one to get to the next line.
*/
}
First_affected = min (First_affected, line3 + 1);
}
return (ret);
}
/* delete --- delete lines from through to */
int se_delete (int from, int to, int *status)
{
LINEDESC *k1, *k2, *j1, *j2, *l1;
if (from <= 0) /* can't delete line 0 */
{
*status = ERR;
Errcode = EORANGE;
}
else
{
if (First_affected > from)
First_affected = from;
blkmove (from, to, MAXBUF - 1); /* stick at end of buffer */
Lastln -= to - from + 1; /* adjust number of last line */
Curln = prevln (from);
Lost_lines += Limcnt;
Limcnt = to - from + 1; /* number of lines "deleted" */
/* point at first deleted */
Limbo = &Buf[MAXBUF - (to - from + 1)];
*status = OK;
svdel (from, to - from + 1);
Buffer_changed = YES;
}
return (*status);
}
/* join --- join a group of lines into a single line */
int join (char sub[])
{
char new[MAXLINE];
int l, line, sublen;
int ret;
LINEDESC *k;
ret = OK;
if (Line1 <= 0)
{
Errcode = EORANGE;
return (ERR);
}
sublen = strlen (sub) + 1; /* length of separator & EOS */
line = Line1;
k = getind (line);
gtxt (k);
move_ (Txt, new, (int) k -> Lineleng); /* move in first chunk */
l = k -> Lineleng;
for (line++; line <= Line2; line++)
{
if (intrpt ())
return (ERR);
if (new[l - 2] == '\n') /* zap the NEWLINE */
l--;
k = NEXTLINE(k); /* get the next line */
gtxt (k);
if (l + sublen - 1 + k -> Lineleng - 1 > MAXLINE) /* won't fit */
{
Errcode = E2LONG;
return (ERR);
}
move_ (sub, &new[l - 1], sublen); /* insert separator string */
l += sublen - 1;
move_ (Txt, &new[l - 1], (int) k -> Lineleng); /* move next line */
l += k -> Lineleng - 1;
}
Curln = Line2; /* all this will replace line1 through line2 */
ret = inject (new); /* inject the new line */
if (ret == OK)
ret = se_delete (Line1, Line2, &ret); /* delete old lines */
Curln++;
if (First_affected > Curln)
First_affected = Curln;
return (ret);
}
/* move --- move line1 through line2 after line3 */
int move (int line3)
{
LINEDESC *k0, *k1, *k2, *k3, *k4, *k5;
if (Line1 <= 0)
{
Errcode = EORANGE;
return (ERR);
}
if (Line1 <= line3 && line3 <= Line2)
{
Errcode = EINSIDEOUT;
return (ERR);
}
blkmove (Line1, Line2, line3);
if (line3 > Line1)
{
Curln = line3;
}
else
Curln = line3 + (Line2 - Line1 + 1);
Buffer_changed = YES;
First_affected = min (First_affected, min (Line1, line3));
return (OK);
}
/* overlay --- let user edit lines directly */
void overlay (int *status)
{
char savtxt[MAXLINE], term, kname;
static char empty[] = "\n";
int lng, vcol, lcurln, scurln;
LINEDESC *indx;
*status = OK;
if (Line1 == 0)
{
Curln = 0;
*status = inject (empty);
if (*status == ERR)
return;
First_affected = 1;
Line1 = 1;
Line2++;
}
for (lcurln = Line1; lcurln <= Line2; lcurln++)
{
Curln = lcurln;
vcol = Overlay_col - 1;
do {
adjust_window (Curln, Curln);
updscreen ();
Cmdrow = Curln - Topln + Toprow;
indx = se_gettxt (Curln);
lng = indx -> Lineleng;
if (Txt[lng - 2] == '\n') /* clobber newline */
lng--;
if (vcol < 0)
vcol = lng - 1;
while (lng - 1 < vcol)
{
Txt[lng - 1] = ' ';
lng++;
}
Txt[lng - 1] = '\n';
Txt[lng] = EOS;
move_ (Txt, savtxt, lng + 1); /* make a copy of the line */
getcmd (Txt, Firstcol, &vcol, &term);
if (term == FUNNY)
{
if (First_affected > Curln)
First_affected = Curln;
Cmdrow = Botrow + 1;
return;
}
if (strcmp (Txt, savtxt) != 0) /* was line changed? */
{
kname = indx -> Markname;
se_delete (Curln, Curln, status);
scurln = Curln;
if (*status == OK)
*status = inject (Txt);
if (*status == ERR)
{
Cmdrow = Botrow + 1;
return;
}
indx = getind (nextln (scurln));
indx -> Markname = kname;
}
else
{ /* in case end-of-line is moved */
if (First_affected > Curln)
First_affected = Curln;
}
switch (term) {
case CURSOR_UP:
if (Curln > 1)
Curln--;
else
Curln = Lastln;
break;
case CURSOR_DOWN:
if (Curln < Lastln)
Curln++;
else
Curln = min (1, Lastln);
break;
case CURSOR_SAME:
vcol = 0;
break;
}
} while (term == CURSOR_UP ||
term == CURSOR_DOWN ||
term == CURSOR_SAME);
}
Cmdrow = Botrow + 1;
return;
}
/* subst --- substitute "sub" for occurrences of pattern */
int subst (char sub[], int gflag, int glob)
{
char new[MAXLINE], kname;
int line, m, k, lastm;
int j, junk, status, subbed, ret;
int tagbeg[10], tagend[10];
LINEDESC *inx;
if (Globals && glob)
ret = OK;
else
ret = ERR;
if (Line1 <= 0)
{
Errcode = EORANGE;
return (ERR);
}
/* the following code has been removed for your protection
se_index() occasionally grabs newlines out of the character class
counter in a pattern. for example [0-9] doesn't work due to this
if (se_index (Pat, '\n') != -1) # never delete NEWLINE
{
Errcode = EBADPAT;
return (ERR);
}
*/
for (line = Line1; line <= Line2; line++)
{
if (intrpt ())
break;
j = 0;
subbed = NO;
inx = se_gettxt (line);
lastm = -1;
for (k = 0; Txt[k] != EOS; )
{
for (m = 1; m <= 9; m++)
{
tagbeg[m] = -1;
tagend[m] = -1;
}
if (gflag == YES || subbed == NO)
m = amatch (Txt, k, Pat, &tagbeg[1], &tagend[1]);
else
m = -1;
if (m > -1 && lastm != m) /* replace matched text */
{
subbed = YES;
tagbeg[0] = k;
tagend[0] = m;
catsub (Txt, tagbeg, tagend, sub, new, &j, MAXLINE);
lastm = m;
}
if (m == -1 || m == k) /* no match or null match */
{
junk = addset (Txt[k], new, &j, MAXLINE);
k++;
}
else
k = m; /* skip matched text */
}
if (subbed == YES)
{
if (addset (EOS, new, &j, MAXLINE) == NO)
{
ret = ERR;
Errcode = E2LONG;
break;
}
kname = inx -> Markname;
se_delete (line, line, &status); /* remembers dot */
ret = inject (new);
if (First_affected > Curln)
First_affected = Curln;
if (ret == ERR)
break;
inx = getind (Curln);
inx -> Markname = kname;
ret = OK;
Buffer_changed = YES;
}
else /* subbed == NO */
Errcode = ENOMATCH;
}
return (ret);
}
/* uniquely_name --- mark-name line; make sure no other line has same name */
void uniquely_name (char kname, int *status)
{
int line;
LINEDESC *k;
defalt (Curln, Curln);
if (Line1 <= 0)
{
*status = ERR;
Errcode = EORANGE;
return;
}
*status = OK;
line = 0;
k = Line0;
do {
line++;
k = NEXTLINE(k);
if (line == Line2)
k -> Markname = kname;
else if (k -> Markname == kname)
k -> Markname = DEFAULTNAME;
} while (line < Lastln);
return;
}
/* draw_box --- draw or erase a box at coordinates in command line */
int draw_box (char lin[], int *i)
{
int left, right, col, len;
int junk;
LINEDESC *k;
char text[MAXLINE];
char kname, ch;
left = ctoi (lin, i);
if (left <= 0 || left > MAXLINE)
{
Errcode = EBADCOL;
return (ERR);
}
if (lin[*i] == ',')
{
(*i)++;
SKIPBL (lin, *i);
right = ctoi (lin, i);
if (right <= 0 || right >= MAXLINE || left > right)
{
Errcode = EBADCOL;
return (ERR);
}
}
else
right = left;
SKIPBL (lin, *i);
if (lin[*i] == '\n')
ch = ' ';
else
ch = lin[(*i)++];
if (lin[*i] != '\n')
{
Errcode = EEGARB;
return (ERR);
}
if (Line1 <= 0)
{
Errcode = EORANGE;
return (ERR);
}
for (Curln = Line1; Curln <= Line2; Curln++)
{
k = se_gettxt (Curln);
len = k -> Lineleng;
move_ (Txt, text, len);
if (text[len - 2] == '\n')
col = len - 1;
else
col = len;
while (col <= right)
{
text[col - 1] = ' ';
col++;
}
text[col - 1] = '\n';
text[col] = EOS;
if (Curln == Line1 || Curln == Line2)
for (col = left; col <= right; col++)
text[col - 1] = ch;
else
{
text[left - 1] = ch;
text[right - 1] = ch;
}
if (strcmp (text, Txt) != 0)
{
kname = k -> Markname;
if (se_delete (Curln, Curln, &junk) == ERR
|| inject (text) == ERR)
return (ERR);
k = getind (Curln);
k -> Markname = kname;
Buffer_changed = YES;
}
}
Curln = Line1; /* move to top of box */
if (First_affected > Curln)
First_affected = Curln;
adjust_window (Curln, Curln);
updscreen ();
return (OK);
}
/* dfltsopt --- set the 's' option to the extension on the file name */
void dfltsopt (char name[])
{
int i;
for (i = strlen (name) - 1; i >= 0; i--)
if (name[i] == '.')
{
dosopt (&name[i + 1]);
break;
}
if (i < 0)
dosopt ("");
}
/* doshell --- escape to the Shell to run one or more Unix commands */
/*
** emulate vi: if running just a shell, redraw the screen as
** soon as the shell exits. if running a program, let the user
** redraw the screen when he/she is ready.
**
** also emulate USG Unix 5.0 ed: a ! as the first character is
** replaced by the previous shell command; an unescaped % is replaced
** by the saved file name. The expanded command is echoed.
*/
#define DEFAULT_PATH SHELL
#define DEF_SHELL (rindex(DEFAULT_PATH, '/') ? rindex(DEFAULT_PATH, '/') + 1 : NULL)
int doshell (char lin[], int *pi)
{
int rc;
int forkstatus, childstatus;
void (*save_quit)(int);
void (*save_int)(int);
int i, auto_redraw;
char *path, *name, *p;
char new_command[MAXLINE];
int j, k;
static char sav_com[MAXLINE] = "";
int expanded = NO;
if (Nlines == 0) /* use normal 'ed' behavior */
{
tflush (); /* flush out the terminal output */
position_cursor (Nrows - 1, 0); /* bottom left corner */
if ((p = getenv ("SHELL")) == NULL || strcmp (p, DEFAULT_PATH) == 0)
{
path = DEFAULT_PATH;
name = DEF_SHELL; /* default */
}
/* on Berkeley systems, check the other shell */
else if (strcmp (p, "/bin/sh") == 0)
{
path = "/bin/sh";
name = "sh";
}
else
{
if (p[0] == '/') /* full pathname there */
{
/* work backwards to find just name */
path = p;
i = strlen (p);
while (p[i] != '/')
i--;
i++; /* skip '/' */
name = &p[i];
}
else
{
char buf[MAXLINE];
memset(buf, '\0', MAXLINE);
snprintf (buf, MAXLINE-1,
"unknown shell, using %s",
DEF_SHELL);
remark (buf);
path = DEFAULT_PATH;
name = DEF_SHELL;
}
}
auto_redraw = (lin[*pi] == '\n') ? YES : NO;
/* build command, checking for leading !, and % anywhere */
if (lin[*pi] == '!')
{
if (sav_com[0] != EOS)
{
for (j = 0; sav_com[j] != EOS; j++)
new_command[j] = sav_com[j];
if (new_command[j-1] == '\n')
j--;
(*pi)++;
expanded = YES;
}
else
{
Errcode = ENOCMD;
return (ERR);
}
}
else
j = 0;
for (i = *pi; lin[i] != EOS; i++)
{
if (lin[i] == ESCAPE)
{
if (lin[i+1] != '%')
{
new_command[j++] = ESCAPE;
new_command[j++] = lin[++i];
}
else
new_command[j++] = lin[++i];
}
else if (lin[i] == '%')
{
for (k = 0; Savfil[k] != EOS; k++)
new_command[j++] = Savfil[k];
expanded = YES;
}
else
new_command[j++] = lin[i];
}
if (new_command[j-1] == '\n')
j--;
new_command[j] = EOS;
memset (sav_com, EOS, MAXLINE);
strncpy (sav_com, new_command, MAXLINE-1); /* save it */
ttynormal ();
t_exit ();
rc = write (1, "\n\n", 2); /* clear out a line */
if (rc == -1)
{
Errcode = ESTUPID;
return ERR;
}
forkstatus = fork();
if (forkstatus == -1) /* the fork failed */
{
ttyedit ();
t_init ();
Errcode = ECANTFORK;
return ERR;
}
if (forkstatus == 0) /* we're in the child process */
{
signal (SIGINT, SIG_DFL);
signal (SIGQUIT, SIG_DFL);
if (strcmp (name, "sh") != 0) /* not /bin/sh */
{
signal (SIGTSTP, SIG_DFL);
}
else
{
signal (SIGTSTP, SIG_IGN);
}
if (auto_redraw) /* no params; run a shell */
{
execl (path, name, NULL);
_exit (RETERR); /* exec failed, notify parent */
}
else
{
if (expanded) /* echo it */
{
printf ("%s\n", new_command);
}
execl (path, name, "-c", new_command, NULL);
_exit (RETERR);
}
}
/* we're in the parent process here */
save_int = signal (SIGINT, SIG_IGN); /* ignore interrupts */
save_quit = signal (SIGQUIT, SIG_IGN);
while (wait (&childstatus) != forkstatus)
;
save_int = signal (SIGINT, save_int); /* catch interupts */
save_quit = signal (SIGQUIT, save_quit);
rc = write (1, "\n\n", 2); /* clear out some message space */
if (rc == -1)
{
Errcode = ESTUPID;
return ERR;
}
Currow = Nrows - 1;
Curcol = 0;
if ((childstatus >> 8) != 0)
{
ttyedit ();
t_init ();
Errcode = ENOSHELL;
return ERR;
}
/* a la vi: */
if (! auto_redraw)
{
int c;
printf ("type return to continue: ");
while ((c = getchar()) != '\n' && c != EOF)
;
}
ttyedit ();
t_init ();
restore_screen ();
return OK;
}
else
{
remark ("Not implemented yet");
}
return OK;
}
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