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#include "tra.h"
/* BUG: keep a free list here? */
void
freepath(Path *p)
{
if(p==nil)
return;
if(--p->ref == 0){
freepath(p->up);
free(p->s);
memset(p, 0xAA, sizeof(Path));
free(p);
}
}
Path*
mkpath(Path *up, char *s)
{
Path *p;
p = emalloc(sizeof(Path));
p->up = up;
if(up)
up->ref++;
p->s = estrdup(s);
p->ref = 1;
setmalloctag(p, getcallerpc(&up));
return p;
}
static void
_writebufpath(Buf *b, Path *p, int depth)
{
if(p){
_writebufpath(b, p->up, depth+1);
writebufstring(b, p->s);
}else
writebufl(b, depth);
}
void
writebufpath(Buf *b, Path *p)
{
writebufc(b, 0);
_writebufpath(b, p, 0);
}
Path*
readbufpath(Buf *b)
{
int i, n;
Path *p;
if(readbufc(b) != 0)
longjmp(b->jmp, BufData);
p = nil;
n = readbufl(b);
for(i=0; i<n; i++){
if(p)
p->ref--;
p = mkpath(p, readbufstringdup(b));
}
setmalloctag(p, getcallerpc(&b));
return p;
}
static int
_pathfmt(Fmt *fmt, Path *p)
{
if(p == nil)
return fmtstrcpy(fmt, "/");
_pathfmt(fmt, p->up);
if(p->up != nil)
fmtstrcpy(fmt, "/");
return fmtstrcpy(fmt, p->s);
}
int
pathfmt(Fmt *fmt)
{
Path *p;
p = va_arg(fmt->args, Path*);
return _pathfmt(fmt, p);
}
Apath*
flattenpath(Path *p)
{
char *s;
int n, ns;
Apath *ap;
Path *q;
n = 0;
ns = 0;
for(q=p; q; q=q->up){
ns += strlen(q->s)+1;
n++;
}
ap = emalloc(sizeof(Apath)+n*sizeof(char*)+ns);
ap->e = (char**)&ap[1];
ap->n = n;
s = (char*)&ap->e[n];
for(q=p; q; q=q->up){
strcpy(s, q->s);
ap->e[--n] = s;
s += strlen(s)+1;
}
setmalloctag(ap, getcallerpc(&p));
return ap;
}
Apath*
mkapath(char *s)
{
int n;
char *t;
Apath *ap;
n = 1;
for(t=s; *t; t++)
if(*t == '/')
n++;
ap = emalloc(sizeof(Apath)+sizeof(char*)*n);
ap->e = (char**)&ap[1];
ap->n = 0;
for(t=s; *t; ){
while(*t == '/')
*t++ = '\0';
if(*t == '\0')
break;
ap->e[ap->n++] = t;
while(*t != '\0' && *t != '/')
t++;
}
assert(ap->n <= n);
setmalloctag(ap, getcallerpc(&s));
return ap;
}
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