minix/commands/elle/eefed.c
2009-11-09 10:26:00 +00:00

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/* ELLE - Copyright 1982, 1984, 1987 by Ken Harrenstien, SRI International
* This software is quasi-public; it may be used freely with
* like software, but may NOT be sold or made part of licensed
* products without permission of the author.
*/
/* EEFED - ED-type functions
*/
#include "elle.h"
/*
* ED_INSERT -- Insert character given as argument.
*/
ed_insert(c)
int c;
{ register SBBUF *sb;
sb = (SBBUF *) cur_buf; /* For a little speed */
sb_putc(sb,c); /* Insert the char */
cur_dot++; /* Advance dot */
buf_tmod((chroff)-1); /* Mark buffer modified, for redisplay etc. */
/* Perhaps later use specialized routine? */
}
ed_insn(ch, cnt)
int ch, cnt;
{ register int i;
if((i = cnt) > 0)
do { ed_insert(ch);
} while(--i);
}
ed_crins()
{
#if FX_EOLMODE
if (eolcrlf(cur_buf)) /* If EOL is made of CR-LF */
ed_insert(CR); /* then first insert CR, then drop down to */
#endif
ed_insert(LF); /* Insert LF */
}
ed_sins (s) /* insert this string */
register char *s;
{ register c;
while (c = *s++)
ed_insert (c);
}
ed_nsins (s, i) /* Insert string of N chars */
register char *s;
register int i;
{ if(i > 0)
do { ed_insert(*s++); } while(--i);
}
/* ED_INDTO(col) - Indent to specified column.
** Finds current cursor position, and inserts tabs and spaces
** so cursor ends up at column goal. Does nothing if already at or past
** specified column.
*/
ed_indto(goal)
register int goal;
{ register int ng;
ng = goal & ~07; /* Get distance to tab stop */
ed_insn(TAB, ((ng - (d_curind() & ~07)) >> 3));
ed_insn(SP, goal-ng);
}
/* Oddball routine - Set cur_dot to actual I/O location and
* tell display that cursor probably moved. This is not really a
* function of itself; it provides support for real functions.
*/
ed_setcur()
{ e_setcur(); /* Set cur_dot */
redp(RD_MOVE); /* Alert redisplay to check cursor loc */
}
/* Go to given dot */
ed_go (dot)
chroff dot;
{ e_go(dot);
ed_setcur();
}
/* Go to given offset from current location */
ed_goff(off)
chroff off;
{ e_goff(off);
ed_setcur();
}
/* Go to given INTEGER offset from current location */
ed_igoff(ioff)
int ioff;
{ e_igoff(ioff);
ed_setcur();
}
/* Reset (delete all of) Buffer
* Should buffer be marked modified or not? Currently isn't.
*/
ed_reset()
{ if(e_blen() == 0)
return; /* Already empty */
e_reset();
cur_dot = 0;
cur_win->w_topldot = 0; /* Is this necessary? */
#if IMAGEN
redp(RD_WINRES|RD_REDO);
#else
redp(RD_WINRES); /* This window needs complete update */
#endif /*-IMAGEN*/
/* buf_mod(); */ /* Mark modified ?? */
/* mark_p = 0; */ /* Say no mark set ?? */
}
ed_deln(off)
chroff off;
{ chroff dot;
dot = e_dot();
e_goff(off);
ed_delete(e_dot(), dot);
}
/* ED_DELETE(dot1,dot2) - Delete all characters between the two
* positions indicated by dot1 and dot2. Their order does not
* matter; cur_dot and mark_dot are updated as necessary.
*/
ed_delete(dot1,dot2)
chroff dot1,dot2;
{ chroff tmpdot, savdot;
if(dot1 > dot2)
{ tmpdot = dot1;
dot1 = dot2;
dot2 = tmpdot;
}
e_go(dot1);
tmpdot = dot2-dot1;
sb_deln((SBBUF *)cur_buf,tmpdot);
savdot = cur_dot; /* Save cur_dot value */
cur_dot = dot1; /* so can set up for */
buf_tmod((chroff)0); /* call to update disp-change vars */
cur_dot = savdot;
if(cur_dot >= dot2)
cur_dot -= tmpdot;
else if(cur_dot > dot1)
cur_dot = dot1;
if(mark_dot >= dot2)
mark_dot -= tmpdot;
else if(mark_dot > dot1)
mark_dot = dot1;
e_gocur();
}
/* ED_KILL(dot1,dot2) - Kill (save and delete) text between two places in
* the buffer.
* We assume we are deleting from dot1 to dot2, thus if dot1 > dot2
* then backwards deletion is implied, and the saved text is prefixed
* (instead of appended) to any previously killed text.
*/
ed_kill(dot1,dot2)
chroff dot1,dot2;
{ register SBSTR *sd, *sdo;
SBSTR *e_copyn();
e_go(dot1);
sd = e_copyn(dot2-dot1);
if(sd == 0) return;
if(last_cmd == KILLCMD && (sdo = kill_ring[kill_ptr]))
{ if(dot1 > dot2) /* Prefix new killed stuff onto old stuff */
{ sbs_app(sd,sdo);
kill_ring[kill_ptr] = sd;
}
else /* Append new stuff to old stuff */
sbs_app(sdo,sd);
}
else kill_push(sd);
ed_delete(dot1,dot2);
}
kill_push(sdp)
SBSTR *sdp;
{ register SBSTR *sd;
if(++kill_ptr >= KILL_LEN) kill_ptr = 0;
if(sd = kill_ring[kill_ptr])
sbs_del(sd);
kill_ring[kill_ptr] = sdp;
}
#define isupper(c) (('A' <= c) && (c <= 'Z'))
#define islower(c) (('a' <= c) && (c <= 'z'))
#define toupper(c) (c + ('A' - 'a'))
#define tolower(c) (c + ('a' - 'A'))
#if FX_UCWORD||FX_LCWORD||FX_UCIWORD||FX_UCREG||FX_LCREG
/* ED_CASE(dot1,dot2,downp) - Change the case within a region.
* downp = 0 for uppercase, 1 for lowercase, 2 for capitalize.
*/
ed_case(dot1, dot2, downp)
chroff dot1, dot2;
int downp;
{ chroff dcnt;
register int c, a, z;
int modflg;
modflg = 0;
if((dcnt = dot2 - dot1) < 0)
{ dcnt = dot1;
dot1 = dot2;
dot2 = dcnt;
dcnt -= dot1;
}
e_go(dot1);
if(downp==2)
{ a = 0; /* 0 looking for wd, 1 in word */
while(--dcnt >= 0)
{ if(delimp(c = e_getc())) /* Char in wd? */
{ a = 0; /* No */
continue;
}
if(a) /* If already inside word */
{ if(isupper(c))
c = tolower(c);
else continue;
}
else /* If encountered start of word */
{ a = 1;
if(islower(c))
c = toupper(c);
else continue;
}
e_backc();
e_ovwc(c);
modflg++;
}
goto casdon;
}
if(downp==0)
{ a = 'a'; /* Convert to lower case */
z = 'z';
downp = -040;
}
else
{ a = 'A'; /* Convert to upper case */
z = 'Z';
downp = 040;
}
while(--dcnt >= 0)
{ if(a <= (c = e_getc()) && c <= z)
{ e_backc();
e_ovwc(c+downp);
modflg++;
}
}
casdon: dot2 = cur_dot; /* Save dot */
e_setcur(); /* Set up for modification range chk*/
if(modflg)
buf_tmat(dot1); /* Stuff munged from there to here */
ed_go(dot2);
}
#endif /* any ed_case caller */
/* UPCASE(c) - Return upper-case version of character */
upcase(ch)
int ch;
{ register int c;
c = ch&0177;
return(islower(c) ? toupper(c) : c);
}