/
exaction.c
1580 lines (1400 loc) · 38.8 KB
/
exaction.c
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/* exaction.c */
/* Copyright 1995 by Steve Kirkendall */
#include "elvis.h"
#ifdef FEATURE_RCSID
char id_exaction[] = "$Id: exaction.c,v 2.127 2004/03/22 00:20:03 steve Exp $";
#endif
#ifdef FEATURE_MISC
/* This function implements the :@x command. */
RESULT ex_at(xinf)
EXINFO *xinf;
{
BUFFER cutbuf;
MARKBUF top, bottom;
/* a cut buffer name is required */
if (!xinf->cutbuf)
{
msg(MSG_ERROR, "cut buffer name required");
return RESULT_ERROR;
}
/* find the cut buffer */
cutbuf = cutbuffer(xinf->cutbuf, ElvFalse);
if (!cutbuf || o_bufchars(cutbuf) == 0L)
{
msg(MSG_ERROR, "[C]cut buffer $1 empty", xinf->cutbuf);
return RESULT_ERROR;
}
/* execute the cut buffer */
return experform(xinf->window, marktmp(top, cutbuf, 0L),
marktmp(bottom, cutbuf, o_bufchars(cutbuf)));
}
/* This function implements the :buffer command, and :browse and :sbrowse. */
RESULT ex_buffer(xinf)
EXINFO *xinf;
{
BUFFER html; /* an html document, for browing */
MARKBUF tmp, tmp2; /* a temporary mark, for adding to html */
long first; /* offset of first buffer name in html */
BUFFER buf; /* a buffer */
WINDOW win; /* a window that shows a given buffer */
CHAR winlist[200]; /* buffer, holds string containing output line */
CHAR *name;
int len; /* length of string in winlist[] */
int bnlen; /* length of buffer name */
CHAR *htmlhead = toCHAR("\
<html><head>\n\
<title>Buffer List</title>\n\
</head><body>\n\
<h1>Buffer List</h1>\n\
<menu>\n");
CHAR *htmltail = toCHAR("</menu></body></html>\n");
assert(xinf->command == EX_BUFFER || xinf->command == EX_BBROWSE || xinf->command == EX_SBBROWSE);
/* do we have an argument? */
if (xinf->rhs)
{
/* switch to the named buffer */
buf = buffind(xinf->rhs);
if (!buf)
{
msg(MSG_ERROR, "[S]no buffer named $1", xinf->rhs);
return RESULT_ERROR;
}
xinf->newcurs = markalloc(buf, buf->docursor);
}
else
{
/* if browsing, then create a buffer */
html = NULL;
first = 0L;
if (xinf->command != EX_BUFFER)
{
html = bufalloc(toCHAR(BBROWSE_BUF), 0, ElvTrue);
bufreplace(marktmp(tmp, html, 0),
marktmp(tmp2, html, o_bufchars(html)),
htmlhead,
CHARlen(htmlhead));
o_bufdisplay(html) = toCHAR("html");
o_initialsyntax(html) = ElvFalse;
o_readonly(html) = ElvTrue;
}
/* no arguments -- list the buffers */
for (buf = buflist((BUFFER)0); buf; buf = buflist(buf))
{
/* If no ! given, then ignore internal buffers.
* And always ignore the buffer list itself
*/
if (buf == html || (o_internal(buf) && !xinf->bang))
{
continue;
}
/* make a list of the windows showing that buffer */
name = o_filename(buf) ? o_filename(buf) : o_bufname(buf);
bnlen = CHARlen(name);
len = 0;
if (!html)
{
for (win = winofbuf((WINDOW)0, buf);
len < (int)(QTY(winlist) - 5 - bnlen) && win;
win = winofbuf(win, buf))
{
/* add this window to the list */
sprintf((char *)winlist + len, "%ld: ", o_windowid(win));
len = CHARlen(winlist);
}
while (len < 6)
{
winlist[len] = ' ';
len++;
}
}
winlist[len++] = (o_internal(buf) ? '-' : o_modified(buf) ? '*' : ' ');
(void)CHARncpy(&winlist[len], name, (size_t)bnlen);
len += bnlen;
if (o_bufid(buf) && len < QTY(winlist) - 10)
{
sprintf((char *)&winlist[len], " (#%ld)", o_bufid(buf));
len = CHARlen(winlist);
}
/* output a line of info about the buffer */
if (html)
{
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, toCHAR("<li><a href=\"buffer:"), 20L);
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, o_bufname(buf), CHARlen(o_bufname(buf)));
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, toCHAR("\">"), 2L);
if (first == 0L)
first = o_bufchars(html);
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, winlist, len);
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, toCHAR("</a>\n"), 5L);
}
else
{
winlist[len++] = '\n';
drawextext(windefault, winlist, len);
}
}
/* if generating html document */
if (html)
{
/* finish off the HTML document */
marksetoffset(&tmp, o_bufchars(html));
bufreplace(&tmp, &tmp, htmltail, CHARlen(htmltail));
o_modified(html) = ElvFalse;
/* if :sbbrowse, try to create a new window. If that
* fails, or if :bbrowse, then replace current window.
*/
bufwilldo(marktmp(tmp, html, first), ElvFalse);
if (xinf->command == EX_BBROWSE
|| !(*gui->creategw)(tochar8(o_bufname(html)), ""))
{
/* :bb -- replace current buffer */
tepush(xinf->window, o_previoustag);
o_previoustag = NULL;
xinf->newcurs = markalloc(html, first);
}
}
}
return RESULT_COMPLETE;
}
RESULT ex_all(xinf)
EXINFO *xinf;
{
BUFFER buf;
MARKBUF bufline1;
MARK origcurs;
RESULT result;
/* An RHS is required */
if (!xinf->rhs)
{
msg(MSG_ERROR, "missing rhs");
return RESULT_ERROR;
}
/* Remember the original cursor */
if (!xinf->window)
origcurs = NULL;
else if (xinf->window->state->pop)
origcurs = xinf->window->state->pop->cursor;
else
origcurs = xinf->window->cursor;
/* for each buffer... */
for (buf = buflist((BUFFER)0), result = RESULT_COMPLETE;
buf && result == RESULT_COMPLETE;
buf = buflist(buf))
{
/* unless ":all!", ignore internal buffers */
if (!xinf->bang && o_internal(buf))
continue;
/* Make this buffer the default buffer */
bufoptions(buf);
/* Temporarily move the window's cursor to the first line
* of this buffer.
*/
if (xinf->window)
{
if (xinf->window->state->pop)
xinf->window->state->pop->cursor = marktmp(bufline1, buf, 0);
else
xinf->window->cursor = marktmp(bufline1, buf, 0);
}
/* execute the command */
result = exstring(xinf->window, xinf->rhs, NULL);
}
/* Restore the original cursor */
if (origcurs)
{
if (xinf->window->state->pop)
xinf->window->state->pop->cursor = origcurs;
else
xinf->window->cursor = origcurs;
}
return result;
}
/* This implements the :window command */
RESULT ex_window(xinf)
EXINFO *xinf;
{
WINDOW win;
BUFFER buf;
char idstr[20];
long id;
/* if no argument, then list windows */
if (!xinf->lhs)
{
for (win = winofbuf(NULL, NULL); win; win = winofbuf(win, NULL))
{
sprintf(idstr, "%6ld: ", o_windowid(win));
drawextext(xinf->window, toCHAR(idstr), strlen(idstr));
drawextext(xinf->window,
o_bufname(markbuffer(win->cursor)),
CHARlen(o_bufname(markbuffer(win->cursor))));
drawextext(xinf->window, toCHAR("\n"), 1);
}
return RESULT_COMPLETE;
}
/* otherwise we are trying to switch windows... */
if (calcnumber(xinf->lhs))
{
/* find a window with the given window id */
id = atol(tochar8(xinf->lhs));
for (win = winofbuf(NULL, NULL);
win && o_windowid(win) != id;
win = winofbuf(win, NULL))
{
}
}
else if (xinf->lhs[0] == '+')
{
/* move up 1 window */
for (win = NULL; winofbuf(win, NULL) != xinf->window; )
{
win = winofbuf(win, NULL);
if (!win)
break;
}
if (!win && xinf->lhs[1])
{
for (win = winofbuf(NULL, NULL);
winofbuf(win, NULL);
win = winofbuf(win, NULL))
{
}
}
}
else if (xinf->lhs[0] == '-')
{
/* move down 1 window */
win = winofbuf(xinf->window, NULL);
if (!win && xinf->lhs[1])
win = winofbuf(NULL, NULL);
}
else
{
/* try to find a window showing a given buffer/file */
buf = buffind(xinf->lhs);
if (!buf)
{
msg(MSG_ERROR, "[S]no buffer named $1", xinf->lhs);
return RESULT_ERROR;
}
win = winofbuf(xinf->window, buf);
if (!win)
{
win = winofbuf(NULL, buf);
}
}
/* did we find the new window? */
if (!win)
{
msg(MSG_ERROR, "no such window");
return RESULT_ERROR;
}
/* switch to the window */
if (gui->focusgw)
{
(*gui->focusgw)(win->gw);
}
else
{
eventfocus(win->gw, ElvTrue);
}
return RESULT_COMPLETE;
}
#endif /* FEATURE_MISC */
RESULT ex_cd(xinf)
EXINFO *xinf;
{
BUFFER buf;
CHAR oldpwd[256];
assert(xinf->command == EX_CD);
/* check arguments */
if (xinf->nfiles != 1)
{
msg(MSG_ERROR, "directory name required");
return RESULT_ERROR;
}
/* if any user buffers have been modified but not saved, complain
* unless '!' was given.
*/
if (!xinf->bang)
{
for (buf = NULL; (buf = buflist(buf)) != NULL; )
{
if (!o_internal(buf) && o_modified(buf))
{
msg(MSG_ERROR, "[S]$1 modified, not saved", o_filename(buf) ? o_filename(buf) : o_bufname(buf));
return RESULT_ERROR;
}
}
}
/* remember the old directory name */
CHARcpy(oldpwd, toCHAR(dircwd()));
/* try to switch to that directory */
if (!dirchdir(xinf->file[0]))
{
msg(MSG_ERROR, "can't change directory");
return RESULT_ERROR;
}
/* store the old directory name as "previousdir" option */
if (optflags(o_previousdir) & OPT_FREE)
safefree(o_previousdir);
o_previousdir = CHARkdup(oldpwd);
optflags(o_previousdir) |= OPT_FREE;
/* turn off the "edited" flag for all user buffers */
for (buf = NULL; (buf = buflist(buf)) != NULL; )
{
if (!o_internal(buf))
o_edited(buf) = ElvFalse;
}
return RESULT_COMPLETE;
}
RESULT ex_edit(xinf)
EXINFO *xinf;
{
BUFFER oldbuf; /* buffer to switch from */
BUFFER newbuf; /* buffer to switch to */
STATE *s; /* used for stepping though state stack */
CHAR *p; /* used for scanning movement string */
EXINFO xinfb; /* dummy command buffer, used for parsing address */
long line=0; /* default line number to start on (0 = no default) */
assert(xinf->command == EX_EDIT || xinf->command == EX_OPEN
|| xinf->command == EX_VISUAL || xinf->command == EX_PUSH);
/* These only work when the ex command acts on the main buffer */
if (xinf->window->state->acton && xinf->window->state->acton->acton)
{
msg(MSG_ERROR, "[s]$1 only works on window's main buffer", xinf->cmdname);
return RESULT_ERROR;
}
/* If visual mode isn't supported, then either fail or use open mode */
if (gui->exonly && xinf->command != EX_EDIT && xinf->command != EX_PUSH)
{
msg(MSG_ERROR, "this gui only supports ex mode");
return RESULT_ERROR;
}
else if (!gui->moveto && xinf->command == EX_VISUAL)
{
msg(MSG_WARNING, "using open mode");
xinf->command = EX_OPEN;
}
/* Are we supposed to switch buffers? */
if (xinf->nfiles > 0)
{
/* If we expect to load the "previousfile" then the default
* starting line is the "previousfileline".
*/
if (o_previousfile
&& !CHARcmp(o_previousfile, xinf->file[0]))
{
line = o_previousfileline;
}
/* For now, set the "previous file" to the named file. If the
* command is successful, this will be replaced by the name of
* the old file before ex_edit() returns. Exception: ":e%"
* should not affect the "previous file".
*/
if (o_filename(markbuffer(xinf->window->cursor))
&& strcmp(tochar8(o_filename(markbuffer(xinf->window->cursor))), xinf->file[0]))
{
if (o_previousfile)
safefree(o_previousfile);
optpreset(o_previousfile, CHARdup(toCHAR(xinf->file[0])), OPT_FREE);
o_previousfileline = 1L;
}
/* If the buffer we'll be loading already exists, and has been
* modified, then fail unless "!" was given.
*/
newbuf = buffind(toCHAR(xinf->file[0]));
if (newbuf && o_modified(newbuf) && !xinf->bang)
{
msg(MSG_ERROR, "[S]$1 modified, not saved", o_filename(newbuf) ? o_filename(newbuf) : o_bufname(newbuf));
return RESULT_ERROR;
}
/* None of these commands are ever supposed to save the old
* buffer. When we eventually switch to the new buffer,
* the old buffer will be unloaded (except maybe for :push),
* so if it has been modified and isn't used by anything else,
* we should either fail (if no ! given) or reset the
* "modified" flag (if !, even for :push)
*/
oldbuf = markbuffer(xinf->window->cursor);
if (winofbuf(NULL, oldbuf) == xinf->window
&& winofbuf(xinf->window, oldbuf) == NULL
&& o_modified(oldbuf))
{
if (xinf->bang)
o_modified(oldbuf) = ElvFalse;
else if (!o_autowrite || !bufsave(oldbuf, ElvFalse, ElvFalse))
{
msg(MSG_ERROR, "[S]$1 modified, not saved", o_filename(oldbuf) ? o_filename(oldbuf) : o_bufname(oldbuf));
return RESULT_ERROR;
}
}
/* For :push, we want to save the old position before switching
* to the new buffer.
*/
if (xinf->command == EX_PUSH)
{
tepush(xinf->window, o_previoustag);
o_previoustag = NULL;
}
/* load the new buffer */
newbuf = bufload(NULL, xinf->file[0], ElvTrue);
/* if the line number is invalid, ignore it */
if (line < 0 || line > o_buflines(newbuf))
{
line = 1;
}
/* If we were given a command, and the buffer is either new or
* non-empty, then run the command.
*/
memset((char *)&xinfb, 0, sizeof xinfb);
xinfb.defaddr.buffer = newbuf;
if (line > 0)
xinfb.defaddr.offset = lowline(bufbufinfo(newbuf), line);
else
xinfb.defaddr.offset = newbuf->docursor;
if (xinf->lhs && (o_newfile(newbuf) || o_bufchars(newbuf) > 0))
{
(void)scanstring(&p, xinf->lhs);
if (exparseaddress(&p, &xinfb))
{
xinfb.defaddr.offset = lowline(
bufbufinfo(xinfb.defaddr.buffer),
xinfb.to);
}
scanfree(&p);
#if 1
marksetbuffer(xinf->window->cursor, newbuf);
marksetoffset(xinf->window->cursor, xinfb.defaddr.offset);
exstring(xinf->window, xinf->lhs, "+");
#endif
}
/* change the buffer of this window. */
xinf->newcurs = markdup(&xinfb.defaddr);
}
else if (xinf->command == EX_PUSH || xinf->command == EX_VISUAL)
{
/* Either ":push" or ":vi" without a filename, but maybe with
* a +line argument.
*/
/* :push saves the old position */
if (xinf->command == EX_PUSH)
{
tepush(xinf->window, o_previoustag);
o_previoustag = NULL;
}
/* both commands accept a "+line" argument */
/*!!! THIS ONLY HANDLES LINE NUMBERS, NOT WHOLE COMMANDS */
if (xinf->lhs)
{
xinfb.defaddr = xinf->defaddr;
(void)scanstring(&p, xinf->lhs);
if (exparseaddress(&p, &xinfb))
{
xinfb.defaddr.offset = lowline(
bufbufinfo(xinfb.defaddr.buffer),
xinfb.to);
xinf->newcurs = markdup(&xinfb.defaddr);
}
scanfree(&p);
}
}
/* Set the main buffer to visual/open mode? */
if (xinf->command != EX_EDIT && xinf->command != EX_PUSH)
{
/* exit "ex" mode */
for (s = xinf->window->state; s != xinf->window->state->acton; s = s->pop)
s->flags |= ELVIS_1LINE;
/* force main edit state use use bottom line, or not to */
if (xinf->command == EX_VISUAL)
{
for (; s; s = s->pop)
s->flags &= ~ELVIS_BOTTOM;
}
else
{
for (; s; s = s->pop)
s->flags |= ELVIS_BOTTOM;
}
}
return RESULT_COMPLETE;
}
RESULT ex_file(xinf)
EXINFO *xinf;
{
long lnum;
MARK cursor;
BUFFER buf;
BUFFER other;
switch (xinf->command)
{
case EX_EQUAL:
if (xinf->anyaddr)
{
if (xinf->from != xinf->to)
msg(MSG_INFO, "[dd]$1,$2 = ($2-$1+1) lines",
xinf->from, xinf->to);
else
msg(MSG_INFO, "[d]$1", xinf->from);
}
else
{
msg(MSG_INFO, "(buflines) lines");
}
break;
default: /* EX_FILE */
/* who are we talking about here? */
cursor = &xinf->defaddr;
buf = markbuffer(cursor);
lnum = markline(cursor);
/* were we given a new name for this buffer? */
if (xinf->nfiles == 1)
{
/* see if another buffer has that name already */
other = buffind(toCHAR(xinf->file[0]));
if (other && !xinf->bang)
{
msg(MSG_ERROR, "another buffer already has that name");
return RESULT_ERROR;
}
/* store the given filename as the new file of this buffer */
o_edited(buf) = ElvFalse;
if (optflags(o_filename(buf)) & OPT_FREE)
{
safefree(o_filename(buf));
}
o_filename(buf) = CHARdup(toCHAR(xinf->file[0]));
optflags(o_filename(buf)) |= OPT_FREE;
buftitle(buf, toCHAR(ioabsolute(xinf->file[0])));
}
/* output statistics of this file */
if (!xinf->bang && xinf->window != NULL)
{
if (markbuffer(xinf->window->cursor) == buf && o_buflines(buf) > 0)
{
msg(MSG_INFO, "[dd](filename)(readonly?\" [READONLY]\")(modified?\" [MODIFIED]\")(!edited?\" [NOT EDITED]\")(newfile?\" [NEW FILE]\") ($1 * 100 / $2)%",
lnum, o_buflines(buf));
}
else
{
msg(MSG_INFO, "(filename)(readonly?\" [READONLY]\")(modified?\" [MODIFIED]\")(!edited?\" [NOT EDITED]\")(newfile?\" [NEW FILE]\")");
}
}
break;
}
return RESULT_COMPLETE;
}
#ifdef FEATURE_LPR
/* This function implements the :lpr command */
RESULT ex_lpr(xinf)
EXINFO *xinf;
{
RESULT ret;
CHAR *origlp;
long origcols;
/* if a filename/filter is given on command line, use it */
origlp = o_lpout;
if (xinf->rhs)
{
o_lpout = xinf->rhs;
}
else if (xinf->nfiles >= 1)
{
assert(xinf->nfiles == 1);
o_lpout = toCHAR(xinf->file[0]);
}
/* temporarily set "columns" to match "lpcolumns", so markup text
* will be formatted to fit the page, not the screen.
*/
origcols = o_columns(xinf->window);
o_columns(xinf->window) = o_lpcolumns;
ret = lp(xinf->window, xinf->fromaddr, xinf->toaddr, xinf->bang);
/* restore columns & lpout to their original values */
o_columns(xinf->window) = origcols;
o_lpout = origlp;
return ret;
}
#endif
/* This function implements the :mark and :k commands */
RESULT ex_mark(xinf)
EXINFO *xinf;
{
/* check mark name */
if (!xinf->lhs || *xinf->lhs < 'a' || *xinf->lhs > 'z')
{
msg(MSG_ERROR, "bad mark name");
return RESULT_ERROR;
}
/* if mark already set, then free its old value. */
if (namedmark[*xinf->lhs - 'a'])
{
markfree(namedmark[*xinf->lhs - 'a']);
}
/* set the mark */
namedmark[*xinf->lhs - 'a'] = markdup(xinf->anyaddr || !xinf->window
? xinf->fromaddr
: xinf->window->cursor);
return RESULT_COMPLETE;
}
#ifdef FEATURE_MKEXRC
RESULT ex_mkexrc(xinf)
EXINFO *xinf;
{
BUFFER buf = buffind(toCHAR(CUSTOM_BUF));
MARKBUF top, bottom;
char *filename;
/* if a name was given on the command line, then set mkexrcfile to
* that name, and regenerate the CUSTOM_BUF.
*/
if (xinf->nfiles == 1 || !o_mkexrcfile)
{
/* choose a filename -- the given one, or ~/CUSTOM_FILE */
if (xinf->nfiles == 1)
filename = xinf->file[0];
else
filename = dirpath(tochar8(o_home), CUSTOM_FILE);
/* store the name in mkexrcfile, and regenerate the CUSTOM_BUF
* so it contains the new value of mkexrcfile.
*/
(void)optputstr(toCHAR("mkexrcfile"), toCHAR(filename), ElvFalse);
eventupdatecustom(ElvTrue);
eventupdatecustom(ElvFalse);
buf = buffind(toCHAR(CUSTOM_BUF));
}
else
/* safe to overwrite, since we'll be writing back out to the
* file that we read these options from in the first place.
*/
xinf->bang = ElvTrue;
/* if no changes have been made, great! */
if (!buf)
{
return RESULT_COMPLETE;
}
/* else write the buffer out. Allow an existing file to be overwritten
* only if no filename was given
*/
if (bufwrite(marktmp(top,buf,0), marktmp(bottom,buf,o_bufchars(buf)),
tochar8(o_mkexrcfile), xinf->bang))
{
return RESULT_COMPLETE;
}
return RESULT_ERROR;
}
#endif
/* This implements the commands which read the args list... :next, :Next,
* :previous, :rewind, :last, :wnext, :snext, :sNext, :sprevious, :srewind,
* and :slast.
*/
RESULT ex_next(xinf)
EXINFO *xinf;
{
int newargnext; /* value argnext should have if successful */
BUFFER oldbuf; /* the buffer we're leaving */
BUFFER newbuf; /* the buffer we're entering */
#ifdef FEATURE_SPLIT
ELVBOOL splitting; /* are we going to create a new window? */
#endif
ELVBOOL closing; /* are we going to delete the old buffer? */
char **tmp; /* used for swapping args lists */
assert(xinf->command == EX_NEXT || xinf->command == EX_PREVIOUS ||
xinf->command == EX_LAST || xinf->command == EX_REWIND ||
xinf->command == EX_SNEXT || xinf->command == EX_SPREVIOUS ||
xinf->command == EX_SLAST || xinf->command == EX_SREWIND ||
xinf->command == EX_WNEXT);
/* initialize some variables */
oldbuf = markbuffer(xinf->window->cursor);
#ifdef FEATURE_SPLIT
splitting = (ELVBOOL)(xinf->command == EX_SNEXT || xinf->command == EX_SPREVIOUS
|| xinf->command == EX_SLAST || xinf->command == EX_SREWIND);
closing = (ELVBOOL)(!splitting && (xinf->command == EX_WNEXT || (winofbuf(NULL, oldbuf) == xinf->window
&& winofbuf(xinf->window, oldbuf) == NULL)));
#else
closing = (ELVBOOL)(xinf->command == EX_WNEXT || (winofbuf(NULL, oldbuf) == xinf->window
&& winofbuf(xinf->window, oldbuf) == NULL));
#endif
/* diddle with the args list. Upon exit, arglist[argnext] is name
* of the next file to load.
*/
newargnext = argnext;
if (xinf->command == EX_REWIND || xinf->command == EX_SREWIND)
{
newargnext = 0;
}
else if (xinf->command == EX_LAST || xinf->command == EX_SLAST)
{
for (newargnext = 0; arglist[newargnext] && arglist[newargnext + 1]; newargnext++)
{
}
}
else if (xinf->command == EX_PREVIOUS || xinf->command == EX_SPREVIOUS)
{
if (argnext < 2)
{
msg(MSG_ERROR, "no more files");
return RESULT_ERROR;
}
newargnext -= 2;
}
else if (xinf->nfiles > 0)
{
/* swap the new args list with the old one. When the ex
* command is freed, the old args list will be freed and the
* new one will remain.
*/
tmp = xinf->file;
xinf->file = arglist;
arglist = tmp;
for (xinf->nfiles = 0; xinf->file[xinf->nfiles]; xinf->nfiles++)
{
}
newargnext = argnext = 0;
}
/* if there is no next file, complain */
if (!arglist[newargnext])
{
msg(MSG_ERROR, "no more files");
return RESULT_ERROR;
}
/* if we'll be closing this buffer, be cautious */
if (closing && o_modified(oldbuf) && !o_autowrite && xinf->command != EX_WNEXT)
{
/* Trying to leave a modifed file which wouldn't be saved */
if (!xinf->bang)
{
msg(MSG_ERROR, "modified, not written");
return RESULT_ERROR;
}
/* else ":n!", so turn off the modified flag */
o_modified(oldbuf) = ElvFalse;
}
if (!closing || bufsave(oldbuf, xinf->bang, (ELVBOOL)(xinf->command == EX_WNEXT)))
{
/* load the new buffer */
newbuf = bufload(NULL, arglist[newargnext++], ElvFalse);
/* either create a new window, or change the buffer
* of this window.
*/
#ifdef FEATURE_SPLIT
if (splitting)
{
if (!(*gui->creategw)(tochar8(o_bufname(newbuf)), ""))
{
return RESULT_ERROR;
}
}
else
#endif
{
xinf->newcurs = markalloc(newbuf, newbuf->docursor);
}
}
argnext = newargnext;
return RESULT_COMPLETE;
}
RESULT ex_pop(xinf)
EXINFO *xinf;
{
int i;
BUFFER buf = markbuffer(xinf->window->cursor);
/* if the tag stack is empty, fail */
if (!xinf->window->tagstack[0].origin)
{
msg(MSG_ERROR, "tag stack empty");
return RESULT_ERROR;
}
/* If the popped buffer is different from the current buffer, then
* we'll want to save the current buffer before switching. If we
* can't switch, then fail unless ! given.
*/
if (markbuffer(xinf->window->tagstack[0].origin) != buf
&& !xinf->bang
&& (o_autowrite ? !bufsave(buf, ElvFalse, ElvFalse)
: o_modified(buf)))
{
if (!o_autowrite)
{
msg(MSG_ERROR, "[S]$1 modified, not saved", o_filename(buf) ? o_filename(buf) : o_bufname(buf));
}
return RESULT_ERROR;
}
/* set the "previous tag" back to what it was when this stack entry
* was pushed.
*/
if (o_previoustag)
safefree(o_previoustag);
o_previoustag = xinf->window->tagstack[0].prevtag;
/* change this window's display mode to what it was when tag pushed */
(void)dispset(xinf->window, xinf->window->tagstack[0].display);
/* cause the cursor to be moved to the position on top of tag stack */
xinf->newcurs = xinf->window->tagstack[0].origin;
/* delete the top item from the tag stack */
for (i = 0; i < TAGSTK - 1; i++)
{
xinf->window->tagstack[i] = xinf->window->tagstack[i + 1];
}
xinf->window->tagstack[i].origin = NULL;
xinf->window->tagstack[i].prevtag = NULL;
#ifdef FEATURE_TAGS
/* clobber the list of matching tags -- this search is done */
if (taglist)
{
tsadjust(taglist, '+');
tagdelete(ElvTrue);
}
#endif
return RESULT_COMPLETE;
}
RESULT ex_bang(xinf)
EXINFO *xinf;
{
MARK mark;
CHAR *cp;
char *bangcmd;
CHAR iobuf[4096];
int len;
ELVBOOL origrefresh;
ELVBOOL partiallast;
ELVBOOL last;
assert(xinf->command == EX_BANG);
/* rhs is required */
if (!xinf->rhs)
{
msg(MSG_ERROR, "filter name is missing");
return RESULT_ERROR;
}
/* if no lines were specified, then just execute the command and
* show its output in the window.
*/
if (!xinf->fromaddr)
{
/* If the GUI has prgopen()/prgclose(), then we can trust it to
* do good things with stdio. Otherwise we'll need to fake it.
*/
if (gui->prgopen)
{
if (xinf->window)
{
drawopencomplete(xinf->window);
assert(xinf->window->di->drawstate == DRAW_OPENOUTPUT);
}
assert(gui->prgclose);
if (gui->flush)
(*gui->flush)();
if ((*gui->prgopen)((char *)xinf->rhs, ElvFalse, ElvFalse)
&& prggo()
&& (*gui->prgclose)() == 0)