#include "readwrite.h"#include "seek.h"#include "alloc.h"#include "cdbmss.h"int cdbmss_start(c,fd)struct cdbmss *c;int fd;{  cdbmake_init(&c->cdbm);  c->fd = fd;  c->pos = sizeof(c->cdbm.final);  substdio_fdbuf(&c->ss,write,fd,c->ssbuf,sizeof(c->ssbuf));  return seek_set(fd,(seek_pos) c->pos);}int cdbmss_add(c,key,keylen,data,datalen)struct cdbmss *c;unsigned char *key;unsigned int keylen;unsigned char *data;unsigned int datalen;{  uint32 h;  int i;  cdbmake_pack(c->packbuf,(uint32) keylen);  cdbmake_pack(c->packbuf + 4,(uint32) datalen);  if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1;  if (substdio_put(&c->ss,key,keylen) == -1) return -1;  if (substdio_put(&c->ss,data,datalen) == -1) return -1;  h = CDBMAKE_HASHSTART;  for (i = 0;i < keylen;++i)    h = cdbmake_hashadd(h,(unsigned int) key[i]);  if (!cdbmake_add(&c->cdbm,h,c->pos,alloc)) return -1;  c->pos += 8 + keylen + datalen; /* XXX: overflow? */  return 0;}int cdbmss_finish(c)struct cdbmss *c;{  int i;  uint32 len;  uint32 u;  if (!cdbmake_split(&c->cdbm,alloc)) return -1;  for (i = 0;i < 256;++i) {    len = cdbmake_throw(&c->cdbm,c->pos,i);    for (u = 0;u < len;++u) {      cdbmake_pack(c->packbuf,c->cdbm.hash[u].h);      cdbmake_pack(c->packbuf + 4,c->cdbm.hash[u].p);      if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1;      c->pos += 8; /* XXX: overflow? */    }  }  if (substdio_flush(&c->ss) == -1) return -1;  if (seek_begin(c->fd) == -1) return -1;  return substdio_putflush(&c->ss,c->cdbm.final,sizeof(c->cdbm.final));}