1 b3994ec5 2003-12-11 devnull #include <u.h>
  2 b3994ec5 2003-12-11 devnull #include <libc.h>
  3 b3994ec5 2003-12-11 devnull #include <draw.h>
  4 b3994ec5 2003-12-11 devnull #include <thread.h>
  5 b3994ec5 2003-12-11 devnull #include <cursor.h>
  6 b3994ec5 2003-12-11 devnull #include <mouse.h>
  7 b3994ec5 2003-12-11 devnull #include <keyboard.h>
  8 b3994ec5 2003-12-11 devnull #include <frame.h>
  9 b3994ec5 2003-12-11 devnull #include <fcall.h>
 10 b3994ec5 2003-12-11 devnull #include <plumb.h>
 11 b3994ec5 2003-12-11 devnull #include "dat.h"
 12 b3994ec5 2003-12-11 devnull #include "edit.h"
 13 b3994ec5 2003-12-11 devnull #include "fns.h"
 14 b3994ec5 2003-12-11 devnull 
 15 b3994ec5 2003-12-11 devnull static char	linex[]="\n";
 16 b3994ec5 2003-12-11 devnull static char	wordx[]=" \t\n";
 17 b3994ec5 2003-12-11 devnull struct cmdtab cmdtab[]={
 18 b3994ec5 2003-12-11 devnull /*	cmdc	text	regexp	addr	defcmd	defaddr	count	token	 fn	*/
 19 b3994ec5 2003-12-11 devnull 	'\n',	0,	0,	0,	0,	aDot,	0,	0,	nl_cmd,
 20 b3994ec5 2003-12-11 devnull 	'a',	1,	0,	0,	0,	aDot,	0,	0,	a_cmd,
 21 b3994ec5 2003-12-11 devnull 	'b',	0,	0,	0,	0,	aNo,	0,	linex,	b_cmd,
 22 b3994ec5 2003-12-11 devnull 	'c',	1,	0,	0,	0,	aDot,	0,	0,	c_cmd,
 23 b3994ec5 2003-12-11 devnull 	'd',	0,	0,	0,	0,	aDot,	0,	0,	d_cmd,
 24 b3994ec5 2003-12-11 devnull 	'e',	0,	0,	0,	0,	aNo,	0,	wordx,	e_cmd,
 25 b3994ec5 2003-12-11 devnull 	'f',	0,	0,	0,	0,	aNo,	0,	wordx,	f_cmd,
 26 b3994ec5 2003-12-11 devnull 	'g',	0,	1,	0,	'p',	aDot,	0,	0,	g_cmd,
 27 b3994ec5 2003-12-11 devnull 	'i',	1,	0,	0,	0,	aDot,	0,	0,	i_cmd,
 28 b3994ec5 2003-12-11 devnull 	'm',	0,	0,	1,	0,	aDot,	0,	0,	m_cmd,
 29 b3994ec5 2003-12-11 devnull 	'p',	0,	0,	0,	0,	aDot,	0,	0,	p_cmd,
 30 b3994ec5 2003-12-11 devnull 	'r',	0,	0,	0,	0,	aDot,	0,	wordx,	e_cmd,
 31 b3994ec5 2003-12-11 devnull 	's',	0,	1,	0,	0,	aDot,	1,	0,	s_cmd,
 32 b3994ec5 2003-12-11 devnull 	't',	0,	0,	1,	0,	aDot,	0,	0,	m_cmd,
 33 b3994ec5 2003-12-11 devnull 	'u',	0,	0,	0,	0,	aNo,	2,	0,	u_cmd,
 34 b3994ec5 2003-12-11 devnull 	'v',	0,	1,	0,	'p',	aDot,	0,	0,	g_cmd,
 35 b3994ec5 2003-12-11 devnull 	'w',	0,	0,	0,	0,	aAll,	0,	wordx,	w_cmd,
 36 b3994ec5 2003-12-11 devnull 	'x',	0,	1,	0,	'p',	aDot,	0,	0,	x_cmd,
 37 b3994ec5 2003-12-11 devnull 	'y',	0,	1,	0,	'p',	aDot,	0,	0,	x_cmd,
 38 b3994ec5 2003-12-11 devnull 	'=',	0,	0,	0,	0,	aDot,	0,	linex,	eq_cmd,
 39 b3994ec5 2003-12-11 devnull 	'B',	0,	0,	0,	0,	aNo,	0,	linex,	B_cmd,
 40 b3994ec5 2003-12-11 devnull 	'D',	0,	0,	0,	0,	aNo,	0,	linex,	D_cmd,
 41 b3994ec5 2003-12-11 devnull 	'X',	0,	1,	0,	'f',	aNo,	0,	0,	X_cmd,
 42 b3994ec5 2003-12-11 devnull 	'Y',	0,	1,	0,	'f',	aNo,	0,	0,	X_cmd,
 43 b3994ec5 2003-12-11 devnull 	'<',	0,	0,	0,	0,	aDot,	0,	linex,	pipe_cmd,
 44 b3994ec5 2003-12-11 devnull 	'|',	0,	0,	0,	0,	aDot,	0,	linex,	pipe_cmd,
 45 b3994ec5 2003-12-11 devnull 	'>',	0,	0,	0,	0,	aDot,	0,	linex,	pipe_cmd,
 46 b3994ec5 2003-12-11 devnull /* deliberately unimplemented:
 47 b3994ec5 2003-12-11 devnull 	'k',	0,	0,	0,	0,	aDot,	0,	0,	k_cmd,
 48 b3994ec5 2003-12-11 devnull 	'n',	0,	0,	0,	0,	aNo,	0,	0,	n_cmd,
 49 b3994ec5 2003-12-11 devnull 	'q',	0,	0,	0,	0,	aNo,	0,	0,	q_cmd,
 50 b3994ec5 2003-12-11 devnull 	'!',	0,	0,	0,	0,	aNo,	0,	linex,	plan9_cmd,
 51 b3994ec5 2003-12-11 devnull  */
 52 cbeb0b26 2006-04-01 devnull 	0,	0,	0,	0,	0,	0,	0,	0
 53 b3994ec5 2003-12-11 devnull };
 54 b3994ec5 2003-12-11 devnull 
 55 b3994ec5 2003-12-11 devnull Cmd	*parsecmd(int);
 56 b3994ec5 2003-12-11 devnull Addr	*compoundaddr(void);
 57 b3994ec5 2003-12-11 devnull Addr	*simpleaddr(void);
 58 b3994ec5 2003-12-11 devnull void	freecmd(void);
 59 b3994ec5 2003-12-11 devnull void	okdelim(int);
 60 b3994ec5 2003-12-11 devnull 
 61 b3994ec5 2003-12-11 devnull Rune	*cmdstartp;
 62 b3994ec5 2003-12-11 devnull Rune *cmdendp;
 63 b3994ec5 2003-12-11 devnull Rune	*cmdp;
 64 b3994ec5 2003-12-11 devnull Channel	*editerrc;
 65 b3994ec5 2003-12-11 devnull 
 66 b3994ec5 2003-12-11 devnull String	*lastpat;
 67 b3994ec5 2003-12-11 devnull int	patset;
 68 b3994ec5 2003-12-11 devnull 
 69 b3994ec5 2003-12-11 devnull List	cmdlist;
 70 b3994ec5 2003-12-11 devnull List	addrlist;
 71 b3994ec5 2003-12-11 devnull List	stringlist;
 72 b3994ec5 2003-12-11 devnull Text	*curtext;
 73 b3994ec5 2003-12-11 devnull int	editing = Inactive;
 74 b3994ec5 2003-12-11 devnull 
 75 b3994ec5 2003-12-11 devnull String*	newstring(int);
 76 b3994ec5 2003-12-11 devnull 
 77 b3994ec5 2003-12-11 devnull void
 78 b3994ec5 2003-12-11 devnull editthread(void *v)
 79 b3994ec5 2003-12-11 devnull {
 80 b3994ec5 2003-12-11 devnull 	Cmd *cmdp;
 81 b3994ec5 2003-12-11 devnull 
 82 b3994ec5 2003-12-11 devnull 	USED(v);
 83 b3994ec5 2003-12-11 devnull 	threadsetname("editthread");
 84 b3994ec5 2003-12-11 devnull 	while((cmdp=parsecmd(0)) != 0){
 85 b3994ec5 2003-12-11 devnull 		if(cmdexec(curtext, cmdp) == 0)
 86 b3994ec5 2003-12-11 devnull 			break;
 87 b3994ec5 2003-12-11 devnull 		freecmd();
 88 b3994ec5 2003-12-11 devnull 	}
 89 b3994ec5 2003-12-11 devnull 	sendp(editerrc, nil);
 90 b3994ec5 2003-12-11 devnull }
 91 b3994ec5 2003-12-11 devnull 
 92 b3994ec5 2003-12-11 devnull void
 93 b3994ec5 2003-12-11 devnull allelogterm(Window *w, void *x)
 94 b3994ec5 2003-12-11 devnull {
 95 b3994ec5 2003-12-11 devnull 	USED(x);
 96 b3994ec5 2003-12-11 devnull 	elogterm(w->body.file);
 97 b3994ec5 2003-12-11 devnull }
 98 b3994ec5 2003-12-11 devnull 
 99 b3994ec5 2003-12-11 devnull void
100 b3994ec5 2003-12-11 devnull alleditinit(Window *w, void *x)
101 b3994ec5 2003-12-11 devnull {
102 b3994ec5 2003-12-11 devnull 	USED(x);
103 b3994ec5 2003-12-11 devnull 	textcommit(&w->tag, TRUE);
104 b3994ec5 2003-12-11 devnull 	textcommit(&w->body, TRUE);
105 b3994ec5 2003-12-11 devnull 	w->body.file->editclean = FALSE;
106 b3994ec5 2003-12-11 devnull }
107 b3994ec5 2003-12-11 devnull 
108 b3994ec5 2003-12-11 devnull void
109 b3994ec5 2003-12-11 devnull allupdate(Window *w, void *x)
110 b3994ec5 2003-12-11 devnull {
111 b3994ec5 2003-12-11 devnull 	Text *t;
112 b3994ec5 2003-12-11 devnull 	int i;
113 b3994ec5 2003-12-11 devnull 	File *f;
114 b3994ec5 2003-12-11 devnull 
115 b3994ec5 2003-12-11 devnull 	USED(x);
116 b3994ec5 2003-12-11 devnull 	t = &w->body;
117 b3994ec5 2003-12-11 devnull 	f = t->file;
118 b3994ec5 2003-12-11 devnull 	if(f->curtext != t)	/* do curtext only */
119 b3994ec5 2003-12-11 devnull 		return;
120 b3994ec5 2003-12-11 devnull 	if(f->elog.type == Null)
121 b3994ec5 2003-12-11 devnull 		elogterm(f);
122 b3994ec5 2003-12-11 devnull 	else if(f->elog.type != Empty){
123 b3994ec5 2003-12-11 devnull 		elogapply(f);
124 b3994ec5 2003-12-11 devnull 		if(f->editclean){
125 b3994ec5 2003-12-11 devnull 			f->mod = FALSE;
126 b3994ec5 2003-12-11 devnull 			for(i=0; i<f->ntext; i++)
127 b3994ec5 2003-12-11 devnull 				f->text[i]->w->dirty = FALSE;
128 b3994ec5 2003-12-11 devnull 		}
129 b3994ec5 2003-12-11 devnull 	}
130 b3994ec5 2003-12-11 devnull 	textsetselect(t, t->q0, t->q1);
131 b3994ec5 2003-12-11 devnull 	textscrdraw(t);
132 b3994ec5 2003-12-11 devnull 	winsettag(w);
133 b3994ec5 2003-12-11 devnull }
134 b3994ec5 2003-12-11 devnull 
135 b3994ec5 2003-12-11 devnull void
136 b3994ec5 2003-12-11 devnull editerror(char *fmt, ...)
137 b3994ec5 2003-12-11 devnull {
138 b3994ec5 2003-12-11 devnull 	va_list arg;
139 b3994ec5 2003-12-11 devnull 	char *s;
140 b3994ec5 2003-12-11 devnull 
141 b3994ec5 2003-12-11 devnull 	va_start(arg, fmt);
142 b3994ec5 2003-12-11 devnull 	s = vsmprint(fmt, arg);
143 b3994ec5 2003-12-11 devnull 	va_end(arg);
144 b3994ec5 2003-12-11 devnull 	freecmd();
145 b3994ec5 2003-12-11 devnull 	allwindows(allelogterm, nil);	/* truncate the edit logs */
146 b3994ec5 2003-12-11 devnull 	sendp(editerrc, s);
147 b3994ec5 2003-12-11 devnull 	threadexits(nil);
148 b3994ec5 2003-12-11 devnull }
149 b3994ec5 2003-12-11 devnull 
150 b3994ec5 2003-12-11 devnull void
151 b3994ec5 2003-12-11 devnull editcmd(Text *ct, Rune *r, uint n)
152 b3994ec5 2003-12-11 devnull {
153 b3994ec5 2003-12-11 devnull 	char *err;
154 b3994ec5 2003-12-11 devnull 
155 b3994ec5 2003-12-11 devnull 	if(n == 0)
156 b3994ec5 2003-12-11 devnull 		return;
157 b3994ec5 2003-12-11 devnull 	if(2*n > RBUFSIZE){
158 b3994ec5 2003-12-11 devnull 		warning(nil, "string too long\n");
159 b3994ec5 2003-12-11 devnull 		return;
160 b3994ec5 2003-12-11 devnull 	}
161 b3994ec5 2003-12-11 devnull 
162 b3994ec5 2003-12-11 devnull 	allwindows(alleditinit, nil);
163 b3994ec5 2003-12-11 devnull 	if(cmdstartp)
164 b3994ec5 2003-12-11 devnull 		free(cmdstartp);
165 b3994ec5 2003-12-11 devnull 	cmdstartp = runemalloc(n+2);
166 b3994ec5 2003-12-11 devnull 	runemove(cmdstartp, r, n);
167 75a851e9 2010-07-14 rsc 	if(r[n-1] != '\n')
168 b3994ec5 2003-12-11 devnull 		cmdstartp[n++] = '\n';
169 b3994ec5 2003-12-11 devnull 	cmdstartp[n] = '\0';
170 b3994ec5 2003-12-11 devnull 	cmdendp = cmdstartp+n;
171 b3994ec5 2003-12-11 devnull 	cmdp = cmdstartp;
172 b3994ec5 2003-12-11 devnull 	if(ct->w == nil)
173 b3994ec5 2003-12-11 devnull 		curtext = nil;
174 b3994ec5 2003-12-11 devnull 	else
175 b3994ec5 2003-12-11 devnull 		curtext = &ct->w->body;
176 b3994ec5 2003-12-11 devnull 	resetxec();
177 b3994ec5 2003-12-11 devnull 	if(editerrc == nil){
178 b3994ec5 2003-12-11 devnull 		editerrc = chancreate(sizeof(char*), 0);
179 334cb1e9 2004-12-27 devnull 		chansetname(editerrc, "editerrc");
180 b3994ec5 2003-12-11 devnull 		lastpat = allocstring(0);
181 b3994ec5 2003-12-11 devnull 	}
182 b3994ec5 2003-12-11 devnull 	threadcreate(editthread, nil, STACK);
183 b3994ec5 2003-12-11 devnull 	err = recvp(editerrc);
184 b3994ec5 2003-12-11 devnull 	editing = Inactive;
185 b3994ec5 2003-12-11 devnull 	if(err != nil){
186 b3994ec5 2003-12-11 devnull 		if(err[0] != '\0')
187 b3994ec5 2003-12-11 devnull 			warning(nil, "Edit: %s\n", err);
188 b3994ec5 2003-12-11 devnull 		free(err);
189 b3994ec5 2003-12-11 devnull 	}
190 b3994ec5 2003-12-11 devnull 
191 b3994ec5 2003-12-11 devnull 	/* update everyone whose edit log has data */
192 b3994ec5 2003-12-11 devnull 	allwindows(allupdate, nil);
193 b3994ec5 2003-12-11 devnull }
194 b3994ec5 2003-12-11 devnull 
195 b3994ec5 2003-12-11 devnull int
196 b3994ec5 2003-12-11 devnull getch(void)
197 b3994ec5 2003-12-11 devnull {
198 75a851e9 2010-07-14 rsc 	if(cmdp == cmdendp)
199 b3994ec5 2003-12-11 devnull 		return -1;
200 b3994ec5 2003-12-11 devnull 	return *cmdp++;
201 b3994ec5 2003-12-11 devnull }
202 b3994ec5 2003-12-11 devnull 
203 b3994ec5 2003-12-11 devnull int
204 b3994ec5 2003-12-11 devnull nextc(void)
205 b3994ec5 2003-12-11 devnull {
206 75a851e9 2010-07-14 rsc 	if(cmdp == cmdendp)
207 b3994ec5 2003-12-11 devnull 		return -1;
208 b3994ec5 2003-12-11 devnull 	return *cmdp;
209 b3994ec5 2003-12-11 devnull }
210 b3994ec5 2003-12-11 devnull 
211 b3994ec5 2003-12-11 devnull void
212 b3994ec5 2003-12-11 devnull ungetch(void)
213 b3994ec5 2003-12-11 devnull {
214 b3994ec5 2003-12-11 devnull 	if(--cmdp < cmdstartp)
215 b3994ec5 2003-12-11 devnull 		error("ungetch");
216 b3994ec5 2003-12-11 devnull }
217 b3994ec5 2003-12-11 devnull 
218 b3994ec5 2003-12-11 devnull long
219 b3994ec5 2003-12-11 devnull getnum(int signok)
220 b3994ec5 2003-12-11 devnull {
221 b3994ec5 2003-12-11 devnull 	long n;
222 b3994ec5 2003-12-11 devnull 	int c, sign;
223 b3994ec5 2003-12-11 devnull 
224 b3994ec5 2003-12-11 devnull 	n = 0;
225 b3994ec5 2003-12-11 devnull 	sign = 1;
226 b3994ec5 2003-12-11 devnull 	if(signok>1 && nextc()=='-'){
227 b3994ec5 2003-12-11 devnull 		sign = -1;
228 b3994ec5 2003-12-11 devnull 		getch();
229 b3994ec5 2003-12-11 devnull 	}
230 b3994ec5 2003-12-11 devnull 	if((c=nextc())<'0' || '9'<c)	/* no number defaults to 1 */
231 b3994ec5 2003-12-11 devnull 		return sign;
232 b3994ec5 2003-12-11 devnull 	while('0'<=(c=getch()) && c<='9')
233 b3994ec5 2003-12-11 devnull 		n = n*10 + (c-'0');
234 b3994ec5 2003-12-11 devnull 	ungetch();
235 b3994ec5 2003-12-11 devnull 	return sign*n;
236 b3994ec5 2003-12-11 devnull }
237 b3994ec5 2003-12-11 devnull 
238 b3994ec5 2003-12-11 devnull int
239 b3994ec5 2003-12-11 devnull cmdskipbl(void)
240 b3994ec5 2003-12-11 devnull {
241 b3994ec5 2003-12-11 devnull 	int c;
242 b3994ec5 2003-12-11 devnull 	do
243 b3994ec5 2003-12-11 devnull 		c = getch();
244 b3994ec5 2003-12-11 devnull 	while(c==' ' || c=='\t');
245 b3994ec5 2003-12-11 devnull 	if(c >= 0)
246 b3994ec5 2003-12-11 devnull 		ungetch();
247 b3994ec5 2003-12-11 devnull 	return c;
248 b3994ec5 2003-12-11 devnull }
249 b3994ec5 2003-12-11 devnull 
250 b3994ec5 2003-12-11 devnull /*
251 b3994ec5 2003-12-11 devnull  * Check that list has room for one more element.
252 b3994ec5 2003-12-11 devnull  */
253 b3994ec5 2003-12-11 devnull void
254 b3994ec5 2003-12-11 devnull growlist(List *l)
255 b3994ec5 2003-12-11 devnull {
256 b3994ec5 2003-12-11 devnull 	if(l->u.listptr==0 || l->nalloc==0){
257 b3994ec5 2003-12-11 devnull 		l->nalloc = INCR;
258 734a96bd 2008-03-07 rsc 		l->u.listptr = emalloc(INCR*sizeof(void*));
259 b3994ec5 2003-12-11 devnull 		l->nused = 0;
260 b3994ec5 2003-12-11 devnull 	}else if(l->nused == l->nalloc){
261 734a96bd 2008-03-07 rsc 		l->u.listptr = erealloc(l->u.listptr, (l->nalloc+INCR)*sizeof(void*));
262 734a96bd 2008-03-07 rsc 		memset(l->u.ptr+l->nalloc, 0, INCR*sizeof(void*));
263 b3994ec5 2003-12-11 devnull 		l->nalloc += INCR;
264 b3994ec5 2003-12-11 devnull 	}
265 b3994ec5 2003-12-11 devnull }
266 b3994ec5 2003-12-11 devnull 
267 b3994ec5 2003-12-11 devnull /*
268 b3994ec5 2003-12-11 devnull  * Remove the ith element from the list
269 b3994ec5 2003-12-11 devnull  */
270 b3994ec5 2003-12-11 devnull void
271 b3994ec5 2003-12-11 devnull dellist(List *l, int i)
272 b3994ec5 2003-12-11 devnull {
273 734a96bd 2008-03-07 rsc 	memmove(&l->u.ptr[i], &l->u.ptr[i+1], (l->nused-(i+1))*sizeof(void*));
274 b3994ec5 2003-12-11 devnull 	l->nused--;
275 b3994ec5 2003-12-11 devnull }
276 b3994ec5 2003-12-11 devnull 
277 b3994ec5 2003-12-11 devnull /*
278 b3994ec5 2003-12-11 devnull  * Add a new element, whose position is i, to the list
279 b3994ec5 2003-12-11 devnull  */
280 b3994ec5 2003-12-11 devnull void
281 734a96bd 2008-03-07 rsc inslist(List *l, int i, void *v)
282 b3994ec5 2003-12-11 devnull {
283 b3994ec5 2003-12-11 devnull 	growlist(l);
284 734a96bd 2008-03-07 rsc 	memmove(&l->u.ptr[i+1], &l->u.ptr[i], (l->nused-i)*sizeof(void*));
285 734a96bd 2008-03-07 rsc 	l->u.ptr[i] = v;
286 b3994ec5 2003-12-11 devnull 	l->nused++;
287 b3994ec5 2003-12-11 devnull }
288 b3994ec5 2003-12-11 devnull 
289 b3994ec5 2003-12-11 devnull void
290 b3994ec5 2003-12-11 devnull listfree(List *l)
291 b3994ec5 2003-12-11 devnull {
292 b3994ec5 2003-12-11 devnull 	free(l->u.listptr);
293 b3994ec5 2003-12-11 devnull 	free(l);
294 b3994ec5 2003-12-11 devnull }
295 b3994ec5 2003-12-11 devnull 
296 b3994ec5 2003-12-11 devnull String*
297 b3994ec5 2003-12-11 devnull allocstring(int n)
298 b3994ec5 2003-12-11 devnull {
299 b3994ec5 2003-12-11 devnull 	String *s;
300 b3994ec5 2003-12-11 devnull 
301 b3994ec5 2003-12-11 devnull 	s = emalloc(sizeof(String));
302 b3994ec5 2003-12-11 devnull 	s->n = n;
303 b3994ec5 2003-12-11 devnull 	s->nalloc = n+10;
304 b3994ec5 2003-12-11 devnull 	s->r = emalloc(s->nalloc*sizeof(Rune));
305 b3994ec5 2003-12-11 devnull 	s->r[n] = '\0';
306 b3994ec5 2003-12-11 devnull 	return s;
307 b3994ec5 2003-12-11 devnull }
308 b3994ec5 2003-12-11 devnull 
309 b3994ec5 2003-12-11 devnull void
310 b3994ec5 2003-12-11 devnull freestring(String *s)
311 b3994ec5 2003-12-11 devnull {
312 b3994ec5 2003-12-11 devnull 	free(s->r);
313 b3994ec5 2003-12-11 devnull 	free(s);
314 b3994ec5 2003-12-11 devnull }
315 b3994ec5 2003-12-11 devnull 
316 b3994ec5 2003-12-11 devnull Cmd*
317 b3994ec5 2003-12-11 devnull newcmd(void){
318 b3994ec5 2003-12-11 devnull 	Cmd *p;
319 b3994ec5 2003-12-11 devnull 
320 b3994ec5 2003-12-11 devnull 	p = emalloc(sizeof(Cmd));
321 734a96bd 2008-03-07 rsc 	inslist(&cmdlist, cmdlist.nused, p);
322 b3994ec5 2003-12-11 devnull 	return p;
323 b3994ec5 2003-12-11 devnull }
324 b3994ec5 2003-12-11 devnull 
325 b3994ec5 2003-12-11 devnull String*
326 b3994ec5 2003-12-11 devnull newstring(int n)
327 b3994ec5 2003-12-11 devnull {
328 b3994ec5 2003-12-11 devnull 	String *p;
329 b3994ec5 2003-12-11 devnull 
330 b3994ec5 2003-12-11 devnull 	p = allocstring(n);
331 734a96bd 2008-03-07 rsc 	inslist(&stringlist, stringlist.nused, p);
332 b3994ec5 2003-12-11 devnull 	return p;
333 b3994ec5 2003-12-11 devnull }
334 b3994ec5 2003-12-11 devnull 
335 b3994ec5 2003-12-11 devnull Addr*
336 b3994ec5 2003-12-11 devnull newaddr(void)
337 b3994ec5 2003-12-11 devnull {
338 b3994ec5 2003-12-11 devnull 	Addr *p;
339 b3994ec5 2003-12-11 devnull 
340 b3994ec5 2003-12-11 devnull 	p = emalloc(sizeof(Addr));
341 734a96bd 2008-03-07 rsc 	inslist(&addrlist, addrlist.nused, p);
342 b3994ec5 2003-12-11 devnull 	return p;
343 b3994ec5 2003-12-11 devnull }
344 b3994ec5 2003-12-11 devnull 
345 b3994ec5 2003-12-11 devnull void
346 b3994ec5 2003-12-11 devnull freecmd(void)
347 b3994ec5 2003-12-11 devnull {
348 b3994ec5 2003-12-11 devnull 	int i;
349 b3994ec5 2003-12-11 devnull 
350 b3994ec5 2003-12-11 devnull 	while(cmdlist.nused > 0)
351 b3994ec5 2003-12-11 devnull 		free(cmdlist.u.ucharptr[--cmdlist.nused]);
352 b3994ec5 2003-12-11 devnull 	while(addrlist.nused > 0)
353 b3994ec5 2003-12-11 devnull 		free(addrlist.u.ucharptr[--addrlist.nused]);
354 b3994ec5 2003-12-11 devnull 	while(stringlist.nused>0){
355 b3994ec5 2003-12-11 devnull 		i = --stringlist.nused;
356 b3994ec5 2003-12-11 devnull 		freestring(stringlist.u.stringptr[i]);
357 b3994ec5 2003-12-11 devnull 	}
358 b3994ec5 2003-12-11 devnull }
359 b3994ec5 2003-12-11 devnull 
360 b3994ec5 2003-12-11 devnull void
361 b3994ec5 2003-12-11 devnull okdelim(int c)
362 b3994ec5 2003-12-11 devnull {
363 b3994ec5 2003-12-11 devnull 	if(c=='\\' || ('a'<=c && c<='z')
364 b3994ec5 2003-12-11 devnull 	|| ('A'<=c && c<='Z') || ('0'<=c && c<='9'))
365 b3994ec5 2003-12-11 devnull 		editerror("bad delimiter %c\n", c);
366 b3994ec5 2003-12-11 devnull }
367 b3994ec5 2003-12-11 devnull 
368 b3994ec5 2003-12-11 devnull void
369 b3994ec5 2003-12-11 devnull atnl(void)
370 b3994ec5 2003-12-11 devnull {
371 b3994ec5 2003-12-11 devnull 	int c;
372 b3994ec5 2003-12-11 devnull 
373 b3994ec5 2003-12-11 devnull 	cmdskipbl();
374 b3994ec5 2003-12-11 devnull 	c = getch();
375 b3994ec5 2003-12-11 devnull 	if(c != '\n')
376 b3994ec5 2003-12-11 devnull 		editerror("newline expected (saw %C)", c);
377 b3994ec5 2003-12-11 devnull }
378 b3994ec5 2003-12-11 devnull 
379 b3994ec5 2003-12-11 devnull void
380 b3994ec5 2003-12-11 devnull Straddc(String *s, int c)
381 b3994ec5 2003-12-11 devnull {
382 b3994ec5 2003-12-11 devnull 	if(s->n+1 >= s->nalloc){
383 b3994ec5 2003-12-11 devnull 		s->nalloc += 10;
384 b3994ec5 2003-12-11 devnull 		s->r = erealloc(s->r, s->nalloc*sizeof(Rune));
385 b3994ec5 2003-12-11 devnull 	}
386 b3994ec5 2003-12-11 devnull 	s->r[s->n++] = c;
387 b3994ec5 2003-12-11 devnull 	s->r[s->n] = '\0';
388 b3994ec5 2003-12-11 devnull }
389 b3994ec5 2003-12-11 devnull 
390 b3994ec5 2003-12-11 devnull void
391 b3994ec5 2003-12-11 devnull getrhs(String *s, int delim, int cmd)
392 b3994ec5 2003-12-11 devnull {
393 b3994ec5 2003-12-11 devnull 	int c;
394 b3994ec5 2003-12-11 devnull 
395 b3994ec5 2003-12-11 devnull 	while((c = getch())>0 && c!=delim && c!='\n'){
396 b3994ec5 2003-12-11 devnull 		if(c == '\\'){
397 b3994ec5 2003-12-11 devnull 			if((c=getch()) <= 0)
398 b3994ec5 2003-12-11 devnull 				error("bad right hand side");
399 b3994ec5 2003-12-11 devnull 			if(c == '\n'){
400 b3994ec5 2003-12-11 devnull 				ungetch();
401 b3994ec5 2003-12-11 devnull 				c='\\';
402 b3994ec5 2003-12-11 devnull 			}else if(c == 'n')
403 b3994ec5 2003-12-11 devnull 				c='\n';
404 b3994ec5 2003-12-11 devnull 			else if(c!=delim && (cmd=='s' || c!='\\'))	/* s does its own */
405 b3994ec5 2003-12-11 devnull 				Straddc(s, '\\');
406 b3994ec5 2003-12-11 devnull 		}
407 b3994ec5 2003-12-11 devnull 		Straddc(s, c);
408 b3994ec5 2003-12-11 devnull 	}
409 b3994ec5 2003-12-11 devnull 	ungetch();	/* let client read whether delimiter, '\n' or whatever */
410 b3994ec5 2003-12-11 devnull }
411 b3994ec5 2003-12-11 devnull 
412 b3994ec5 2003-12-11 devnull String *
413 b3994ec5 2003-12-11 devnull collecttoken(char *end)
414 b3994ec5 2003-12-11 devnull {
415 b3994ec5 2003-12-11 devnull 	String *s = newstring(0);
416 b3994ec5 2003-12-11 devnull 	int c;
417 b3994ec5 2003-12-11 devnull 
418 b3994ec5 2003-12-11 devnull 	while((c=nextc())==' ' || c=='\t')
419 b3994ec5 2003-12-11 devnull 		Straddc(s, getch()); /* blanks significant for getname() */
420 b3994ec5 2003-12-11 devnull 	while((c=getch())>0 && utfrune(end, c)==0)
421 b3994ec5 2003-12-11 devnull 		Straddc(s, c);
422 b3994ec5 2003-12-11 devnull 	if(c != '\n')
423 b3994ec5 2003-12-11 devnull 		atnl();
424 b3994ec5 2003-12-11 devnull 	return s;
425 b3994ec5 2003-12-11 devnull }
426 b3994ec5 2003-12-11 devnull 
427 b3994ec5 2003-12-11 devnull String *
428 b3994ec5 2003-12-11 devnull collecttext(void)
429 b3994ec5 2003-12-11 devnull {
430 b3994ec5 2003-12-11 devnull 	String *s;
431 b3994ec5 2003-12-11 devnull 	int begline, i, c, delim;
432 b3994ec5 2003-12-11 devnull 
433 b3994ec5 2003-12-11 devnull 	s = newstring(0);
434 b3994ec5 2003-12-11 devnull 	if(cmdskipbl()=='\n'){
435 b3994ec5 2003-12-11 devnull 		getch();
436 b3994ec5 2003-12-11 devnull 		i = 0;
437 b3994ec5 2003-12-11 devnull 		do{
438 b3994ec5 2003-12-11 devnull 			begline = i;
439 b3994ec5 2003-12-11 devnull 			while((c = getch())>0 && c!='\n')
440 b3994ec5 2003-12-11 devnull 				i++, Straddc(s, c);
441 b3994ec5 2003-12-11 devnull 			i++, Straddc(s, '\n');
442 b3994ec5 2003-12-11 devnull 			if(c < 0)
443 b3994ec5 2003-12-11 devnull 				goto Return;
444 b3994ec5 2003-12-11 devnull 		}while(s->r[begline]!='.' || s->r[begline+1]!='\n');
445 b3994ec5 2003-12-11 devnull 		s->r[s->n-2] = '\0';
446 6d7fdb24 2004-12-27 devnull 		s->n -= 2;
447 b3994ec5 2003-12-11 devnull 	}else{
448 b3994ec5 2003-12-11 devnull 		okdelim(delim = getch());
449 b3994ec5 2003-12-11 devnull 		getrhs(s, delim, 'a');
450 b3994ec5 2003-12-11 devnull 		if(nextc()==delim)
451 b3994ec5 2003-12-11 devnull 			getch();
452 b3994ec5 2003-12-11 devnull 		atnl();
453 b3994ec5 2003-12-11 devnull 	}
454 b3994ec5 2003-12-11 devnull     Return:
455 b3994ec5 2003-12-11 devnull 	return s;
456 b3994ec5 2003-12-11 devnull }
457 b3994ec5 2003-12-11 devnull 
458 b3994ec5 2003-12-11 devnull int
459 b3994ec5 2003-12-11 devnull cmdlookup(int c)
460 b3994ec5 2003-12-11 devnull {
461 b3994ec5 2003-12-11 devnull 	int i;
462 b3994ec5 2003-12-11 devnull 
463 b3994ec5 2003-12-11 devnull 	for(i=0; cmdtab[i].cmdc; i++)
464 b3994ec5 2003-12-11 devnull 		if(cmdtab[i].cmdc == c)
465 b3994ec5 2003-12-11 devnull 			return i;
466 b3994ec5 2003-12-11 devnull 	return -1;
467 b3994ec5 2003-12-11 devnull }
468 b3994ec5 2003-12-11 devnull 
469 b3994ec5 2003-12-11 devnull Cmd*
470 b3994ec5 2003-12-11 devnull parsecmd(int nest)
471 b3994ec5 2003-12-11 devnull {
472 b3994ec5 2003-12-11 devnull 	int i, c;
473 b3994ec5 2003-12-11 devnull 	struct cmdtab *ct;
474 b3994ec5 2003-12-11 devnull 	Cmd *cp, *ncp;
475 b3994ec5 2003-12-11 devnull 	Cmd cmd;
476 b3994ec5 2003-12-11 devnull 
477 b3994ec5 2003-12-11 devnull 	cmd.next = cmd.u.cmd = 0;
478 b3994ec5 2003-12-11 devnull 	cmd.re = 0;
479 b3994ec5 2003-12-11 devnull 	cmd.flag = cmd.num = 0;
480 b3994ec5 2003-12-11 devnull 	cmd.addr = compoundaddr();
481 b3994ec5 2003-12-11 devnull 	if(cmdskipbl() == -1)
482 b3994ec5 2003-12-11 devnull 		return 0;
483 b3994ec5 2003-12-11 devnull 	if((c=getch())==-1)
484 b3994ec5 2003-12-11 devnull 		return 0;
485 b3994ec5 2003-12-11 devnull 	cmd.cmdc = c;
486 b3994ec5 2003-12-11 devnull 	if(cmd.cmdc=='c' && nextc()=='d'){	/* sleazy two-character case */
487 b3994ec5 2003-12-11 devnull 		getch();		/* the 'd' */
488 b3994ec5 2003-12-11 devnull 		cmd.cmdc='c'|0x100;
489 b3994ec5 2003-12-11 devnull 	}
490 b3994ec5 2003-12-11 devnull 	i = cmdlookup(cmd.cmdc);
491 b3994ec5 2003-12-11 devnull 	if(i >= 0){
492 b3994ec5 2003-12-11 devnull 		if(cmd.cmdc == '\n')
493 b3994ec5 2003-12-11 devnull 			goto Return;	/* let nl_cmd work it all out */
494 b3994ec5 2003-12-11 devnull 		ct = &cmdtab[i];
495 b3994ec5 2003-12-11 devnull 		if(ct->defaddr==aNo && cmd.addr)
496 b3994ec5 2003-12-11 devnull 			editerror("command takes no address");
497 b3994ec5 2003-12-11 devnull 		if(ct->count)
498 b3994ec5 2003-12-11 devnull 			cmd.num = getnum(ct->count);
499 b3994ec5 2003-12-11 devnull 		if(ct->regexp){
500 b3994ec5 2003-12-11 devnull 			/* x without pattern -> .*\n, indicated by cmd.re==0 */
501 b3994ec5 2003-12-11 devnull 			/* X without pattern is all files */
502 b3994ec5 2003-12-11 devnull 			if((ct->cmdc!='x' && ct->cmdc!='X') ||
503 b3994ec5 2003-12-11 devnull 			   ((c = nextc())!=' ' && c!='\t' && c!='\n')){
504 b3994ec5 2003-12-11 devnull 				cmdskipbl();
505 b3994ec5 2003-12-11 devnull 				if((c = getch())=='\n' || c<0)
506 b3994ec5 2003-12-11 devnull 					editerror("no address");
507 b3994ec5 2003-12-11 devnull 				okdelim(c);
508 b3994ec5 2003-12-11 devnull 				cmd.re = getregexp(c);
509 b3994ec5 2003-12-11 devnull 				if(ct->cmdc == 's'){
510 b3994ec5 2003-12-11 devnull 					cmd.u.text = newstring(0);
511 b3994ec5 2003-12-11 devnull 					getrhs(cmd.u.text, c, 's');
512 b3994ec5 2003-12-11 devnull 					if(nextc() == c){
513 b3994ec5 2003-12-11 devnull 						getch();
514 b3994ec5 2003-12-11 devnull 						if(nextc() == 'g')
515 b3994ec5 2003-12-11 devnull 							cmd.flag = getch();
516 b3994ec5 2003-12-11 devnull 					}
517 b3994ec5 2003-12-11 devnull 			
518 b3994ec5 2003-12-11 devnull 				}
519 b3994ec5 2003-12-11 devnull 			}
520 b3994ec5 2003-12-11 devnull 		}
521 b3994ec5 2003-12-11 devnull 		if(ct->addr && (cmd.u.mtaddr=simpleaddr())==0)
522 b3994ec5 2003-12-11 devnull 			editerror("bad address");
523 b3994ec5 2003-12-11 devnull 		if(ct->defcmd){
524 b3994ec5 2003-12-11 devnull 			if(cmdskipbl() == '\n'){
525 b3994ec5 2003-12-11 devnull 				getch();
526 b3994ec5 2003-12-11 devnull 				cmd.u.cmd = newcmd();
527 b3994ec5 2003-12-11 devnull 				cmd.u.cmd->cmdc = ct->defcmd;
528 b3994ec5 2003-12-11 devnull 			}else if((cmd.u.cmd = parsecmd(nest))==0)
529 b3994ec5 2003-12-11 devnull 				error("defcmd");
530 b3994ec5 2003-12-11 devnull 		}else if(ct->text)
531 b3994ec5 2003-12-11 devnull 			cmd.u.text = collecttext();
532 b3994ec5 2003-12-11 devnull 		else if(ct->token)
533 b3994ec5 2003-12-11 devnull 			cmd.u.text = collecttoken(ct->token);
534 b3994ec5 2003-12-11 devnull 		else
535 b3994ec5 2003-12-11 devnull 			atnl();
536 b3994ec5 2003-12-11 devnull 	}else
537 b3994ec5 2003-12-11 devnull 		switch(cmd.cmdc){
538 b3994ec5 2003-12-11 devnull 		case '{':
539 b3994ec5 2003-12-11 devnull 			cp = 0;
540 b3994ec5 2003-12-11 devnull 			do{
541 b3994ec5 2003-12-11 devnull 				if(cmdskipbl()=='\n')
542 b3994ec5 2003-12-11 devnull 					getch();
543 b3994ec5 2003-12-11 devnull 				ncp = parsecmd(nest+1);
544 b3994ec5 2003-12-11 devnull 				if(cp)
545 b3994ec5 2003-12-11 devnull 					cp->next = ncp;
546 b3994ec5 2003-12-11 devnull 				else
547 b3994ec5 2003-12-11 devnull 					cmd.u.cmd = ncp;
548 b3994ec5 2003-12-11 devnull 			}while(cp = ncp);
549 b3994ec5 2003-12-11 devnull 			break;
550 b3994ec5 2003-12-11 devnull 		case '}':
551 b3994ec5 2003-12-11 devnull 			atnl();
552 b3994ec5 2003-12-11 devnull 			if(nest==0)
553 b3994ec5 2003-12-11 devnull 				editerror("right brace with no left brace");
554 b3994ec5 2003-12-11 devnull 			return 0;
555 b3994ec5 2003-12-11 devnull 		default:
556 b3994ec5 2003-12-11 devnull 			editerror("unknown command %c", cmd.cmdc);
557 b3994ec5 2003-12-11 devnull 		}
558 b3994ec5 2003-12-11 devnull     Return:
559 b3994ec5 2003-12-11 devnull 	cp = newcmd();
560 b3994ec5 2003-12-11 devnull 	*cp = cmd;
561 b3994ec5 2003-12-11 devnull 	return cp;
562 b3994ec5 2003-12-11 devnull }
563 b3994ec5 2003-12-11 devnull 
564 b3994ec5 2003-12-11 devnull String*
565 b3994ec5 2003-12-11 devnull getregexp(int delim)
566 b3994ec5 2003-12-11 devnull {
567 b3994ec5 2003-12-11 devnull 	String *buf, *r;
568 b3994ec5 2003-12-11 devnull 	int i, c;
569 b3994ec5 2003-12-11 devnull 
570 b3994ec5 2003-12-11 devnull 	buf = allocstring(0);
571 b3994ec5 2003-12-11 devnull 	for(i=0; ; i++){
572 b3994ec5 2003-12-11 devnull 		if((c = getch())=='\\'){
573 b3994ec5 2003-12-11 devnull 			if(nextc()==delim)
574 b3994ec5 2003-12-11 devnull 				c = getch();
575 b3994ec5 2003-12-11 devnull 			else if(nextc()=='\\'){
576 b3994ec5 2003-12-11 devnull 				Straddc(buf, c);
577 b3994ec5 2003-12-11 devnull 				c = getch();
578 b3994ec5 2003-12-11 devnull 			}
579 b3994ec5 2003-12-11 devnull 		}else if(c==delim || c=='\n')
580 b3994ec5 2003-12-11 devnull 			break;
581 b3994ec5 2003-12-11 devnull 		if(i >= RBUFSIZE)
582 b3994ec5 2003-12-11 devnull 			editerror("regular expression too long");
583 b3994ec5 2003-12-11 devnull 		Straddc(buf, c);
584 b3994ec5 2003-12-11 devnull 	}
585 b3994ec5 2003-12-11 devnull 	if(c!=delim && c)
586 b3994ec5 2003-12-11 devnull 		ungetch();
587 b3994ec5 2003-12-11 devnull 	if(buf->n > 0){
588 b3994ec5 2003-12-11 devnull 		patset = TRUE;
589 b3994ec5 2003-12-11 devnull 		freestring(lastpat);
590 b3994ec5 2003-12-11 devnull 		lastpat = buf;
591 b3994ec5 2003-12-11 devnull 	}else
592 b3994ec5 2003-12-11 devnull 		freestring(buf);
593 b3994ec5 2003-12-11 devnull 	if(lastpat->n == 0)
594 b3994ec5 2003-12-11 devnull 		editerror("no regular expression defined");
595 b3994ec5 2003-12-11 devnull 	r = newstring(lastpat->n);
596 b3994ec5 2003-12-11 devnull 	runemove(r->r, lastpat->r, lastpat->n);	/* newstring put \0 at end */
597 b3994ec5 2003-12-11 devnull 	return r;
598 b3994ec5 2003-12-11 devnull }
599 b3994ec5 2003-12-11 devnull 
600 b3994ec5 2003-12-11 devnull Addr *
601 b3994ec5 2003-12-11 devnull simpleaddr(void)
602 b3994ec5 2003-12-11 devnull {
603 b3994ec5 2003-12-11 devnull 	Addr addr;
604 b3994ec5 2003-12-11 devnull 	Addr *ap, *nap;
605 b3994ec5 2003-12-11 devnull 
606 a8ec4910 2005-07-13 devnull 	addr.num = 0;
607 b3994ec5 2003-12-11 devnull 	addr.next = 0;
608 b3994ec5 2003-12-11 devnull 	addr.u.left = 0;
609 b3994ec5 2003-12-11 devnull 	switch(cmdskipbl()){
610 b3994ec5 2003-12-11 devnull 	case '#':
611 b3994ec5 2003-12-11 devnull 		addr.type = getch();
612 b3994ec5 2003-12-11 devnull 		addr.num = getnum(1);
613 b3994ec5 2003-12-11 devnull 		break;
614 b3994ec5 2003-12-11 devnull 	case '0': case '1': case '2': case '3': case '4':
615 b3994ec5 2003-12-11 devnull 	case '5': case '6': case '7': case '8': case '9': 
616 b3994ec5 2003-12-11 devnull 		addr.num = getnum(1);
617 b3994ec5 2003-12-11 devnull 		addr.type='l';
618 b3994ec5 2003-12-11 devnull 		break;
619 b3994ec5 2003-12-11 devnull 	case '/': case '?': case '"':
620 b3994ec5 2003-12-11 devnull 		addr.u.re = getregexp(addr.type = getch());
621 b3994ec5 2003-12-11 devnull 		break;
622 b3994ec5 2003-12-11 devnull 	case '.':
623 b3994ec5 2003-12-11 devnull 	case '$':
624 b3994ec5 2003-12-11 devnull 	case '+':
625 b3994ec5 2003-12-11 devnull 	case '-':
626 b3994ec5 2003-12-11 devnull 	case '\'':
627 b3994ec5 2003-12-11 devnull 		addr.type = getch();
628 b3994ec5 2003-12-11 devnull 		break;
629 b3994ec5 2003-12-11 devnull 	default:
630 b3994ec5 2003-12-11 devnull 		return 0;
631 b3994ec5 2003-12-11 devnull 	}
632 b3994ec5 2003-12-11 devnull 	if(addr.next = simpleaddr())
633 b3994ec5 2003-12-11 devnull 		switch(addr.next->type){
634 b3994ec5 2003-12-11 devnull 		case '.':
635 b3994ec5 2003-12-11 devnull 		case '$':
636 b3994ec5 2003-12-11 devnull 		case '\'':
637 b3994ec5 2003-12-11 devnull 			if(addr.type!='"')
638 b3994ec5 2003-12-11 devnull 		case '"':
639 b3994ec5 2003-12-11 devnull 				editerror("bad address syntax");
640 b3994ec5 2003-12-11 devnull 			break;
641 b3994ec5 2003-12-11 devnull 		case 'l':
642 b3994ec5 2003-12-11 devnull 		case '#':
643 b3994ec5 2003-12-11 devnull 			if(addr.type=='"')
644 b3994ec5 2003-12-11 devnull 				break;
645 b3994ec5 2003-12-11 devnull 			/* fall through */
646 b3994ec5 2003-12-11 devnull 		case '/':
647 b3994ec5 2003-12-11 devnull 		case '?':
648 b3994ec5 2003-12-11 devnull 			if(addr.type!='+' && addr.type!='-'){
649 b3994ec5 2003-12-11 devnull 				/* insert the missing '+' */
650 b3994ec5 2003-12-11 devnull 				nap = newaddr();
651 b3994ec5 2003-12-11 devnull 				nap->type='+';
652 b3994ec5 2003-12-11 devnull 				nap->next = addr.next;
653 b3994ec5 2003-12-11 devnull 				addr.next = nap;
654 b3994ec5 2003-12-11 devnull 			}
655 b3994ec5 2003-12-11 devnull 			break;
656 b3994ec5 2003-12-11 devnull 		case '+':
657 b3994ec5 2003-12-11 devnull 		case '-':
658 b3994ec5 2003-12-11 devnull 			break;
659 b3994ec5 2003-12-11 devnull 		default:
660 b3994ec5 2003-12-11 devnull 			error("simpleaddr");
661 b3994ec5 2003-12-11 devnull 		}
662 b3994ec5 2003-12-11 devnull 	ap = newaddr();
663 b3994ec5 2003-12-11 devnull 	*ap = addr;
664 b3994ec5 2003-12-11 devnull 	return ap;
665 b3994ec5 2003-12-11 devnull }
666 b3994ec5 2003-12-11 devnull 
667 b3994ec5 2003-12-11 devnull Addr *
668 b3994ec5 2003-12-11 devnull compoundaddr(void)
669 b3994ec5 2003-12-11 devnull {
670 b3994ec5 2003-12-11 devnull 	Addr addr;
671 b3994ec5 2003-12-11 devnull 	Addr *ap, *next;
672 b3994ec5 2003-12-11 devnull 
673 b3994ec5 2003-12-11 devnull 	addr.u.left = simpleaddr();
674 b3994ec5 2003-12-11 devnull 	if((addr.type = cmdskipbl())!=',' && addr.type!=';')
675 b3994ec5 2003-12-11 devnull 		return addr.u.left;
676 b3994ec5 2003-12-11 devnull 	getch();
677 b3994ec5 2003-12-11 devnull 	next = addr.next = compoundaddr();
678 b3994ec5 2003-12-11 devnull 	if(next && (next->type==',' || next->type==';') && next->u.left==0)
679 b3994ec5 2003-12-11 devnull 		editerror("bad address syntax");
680 b3994ec5 2003-12-11 devnull 	ap = newaddr();
681 b3994ec5 2003-12-11 devnull 	*ap = addr;
682 b3994ec5 2003-12-11 devnull 	return ap;
683 b3994ec5 2003-12-11 devnull }