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#include <errno.h>
#include <string.h>
#include <user/lib/fs/dir.h>
void dir_start(struct dirbuild *db, long offset, char *buf, size_t buflen) {
db->offset = offset;
db->buf = buf;
db->bpos = 0;
db->blen = buflen;
db->error = 0;
if (offset < 0)
db->error = -ENOSYS; // TODO
}
bool dir_append(struct dirbuild *db, const char *name) {
if (db->error) return true;
long len = strlen(name) + 1;
if (db->offset < len) {
name += db->offset;
len -= db->offset;
db->offset = 0;
// TODO no buffer overrun check
memcpy(db->buf + db->bpos, name, len);
db->bpos += len;
} else {
db->offset -= len;
}
return false;
}
long dir_finish(struct dirbuild *db) {
return db->error ? db->error : db->bpos;
}
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