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acme: factor out tag parsing code

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This commit is contained in:
Russ Cox 2020-01-13 20:00:51 -05:00
parent 3a62e56307
commit 81d992e35f
3 changed files with 28 additions and 21 deletions
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1
src/cmd/acme/fns.h
View file

@ -95,6 +95,7 @@ void flushwarnings(void);
void startplumbing(void);
long nlcount(Text*, long, long, long*);
long nlcounttopos(Text*, long, long, long);
Rune* parsetag(Window*, int*);
Runestr runestr(Rune*, uint);
Range range(int, int);

18
src/cmd/acme/look.c
View file

@ -477,9 +477,9 @@ includename(Text *t, Rune *r, int n)
Runestr
dirname(Text *t, Rune *r, int n)
{
Rune *b, c;
uint m, nt;
int slash;
Rune *b;
uint nt;
int slash, i;
Runestr tmp;
b = nil;
@ -490,15 +490,13 @@ dirname(Text *t, Rune *r, int n)
goto Rescue;
if(n>=1 && r[0]=='/')
goto Rescue;
b = runemalloc(nt+n+1);
bufread(&t->w->tag.file->b, 0, b, nt);
b = parsetag(t->w, &i);
slash = -1;
for(m=0; m<nt; m++){
c = b[m];
if(c == '/')
slash = m;
if(c==' ' || c=='\t')
for(i--; i >= 0; i--){
if(b[i] == '/'){
slash = i;
break;
}
}
if(slash < 0)
goto Rescue;

30
src/cmd/acme/wind.c
View file

@ -440,6 +440,23 @@ wincleartag(Window *w)
textsetselect(&w->tag, w->tag.q0, w->tag.q1);
}
Rune*
parsetag(Window *w, int *len)
{
int i;
Rune *r;
r = runemalloc(w->tag.file->b.nc+1);
bufread(&w->tag.file->b, 0, r, w->tag.file->b.nc);
r[w->tag.file->b.nc] = '\0';
for(i=0; i<w->tag.file->b.nc; i++)
if(r[i]==' ' || r[i]=='\t')
break;
*len = i;
return r;
}
void
winsettag1(Window *w)
{
@ -458,12 +475,7 @@ winsettag1(Window *w)
/* there are races that get us here with stuff in the tag cache, so we take extra care to sync it */
if(w->tag.ncache!=0 || w->tag.file->mod)
wincommit(w, &w->tag); /* check file name; also guarantees we can modify tag contents */
old = runemalloc(w->tag.file->b.nc+1);
bufread(&w->tag.file->b, 0, old, w->tag.file->b.nc);
old[w->tag.file->b.nc] = '\0';
for(i=0; i<w->tag.file->b.nc; i++)
if(old[i]==' ' || old[i]=='\t')
break;
old = parsetag(w, &i);
if(runeeq(old, i, w->body.file->name, w->body.file->nname) == FALSE){
textdelete(&w->tag, 0, i, TRUE);
textinsert(&w->tag, 0, w->body.file->name, w->body.file->nname, TRUE);
@ -584,11 +596,7 @@ wincommit(Window *w, Text *t)
textcommit(f->text[i], FALSE); /* no-op for t */
if(t->what == Body)
return;
r = runemalloc(w->tag.file->b.nc);
bufread(&w->tag.file->b, 0, r, w->tag.file->b.nc);
for(i=0; i<w->tag.file->b.nc; i++)
if(r[i]==' ' || r[i]=='\t')
break;
r = parsetag(w, &i);
if(runeeq(r, i, w->body.file->name, w->body.file->nname) == FALSE){
seq++;
filemark(w->body.file);