| 1 | #include "readwrite.h" |
| 2 | #include "seek.h" |
| 3 | #include "alloc.h" |
| 4 | #include "cdbmss.h" |
| 5 | |
| 6 | int cdbmss_start(c,fd) |
| 7 | struct cdbmss *c; |
| 8 | int fd; |
| 9 | { |
| 10 | cdbmake_init(&c->cdbm); |
| 11 | c->fd = fd; |
| 12 | c->pos = sizeof(c->cdbm.final); |
| 13 | substdio_fdbuf(&c->ss,write,fd,c->ssbuf,sizeof(c->ssbuf)); |
| 14 | return seek_set(fd,(seek_pos) c->pos); |
| 15 | } |
| 16 | |
| 17 | int cdbmss_add(c,key,keylen,data,datalen) |
| 18 | struct cdbmss *c; |
| 19 | unsigned char *key; |
| 20 | unsigned int keylen; |
| 21 | unsigned char *data; |
| 22 | unsigned int datalen; |
| 23 | { |
| 24 | uint32 h; |
| 25 | int i; |
| 26 | |
| 27 | cdbmake_pack(c->packbuf,(uint32) keylen); |
| 28 | cdbmake_pack(c->packbuf + 4,(uint32) datalen); |
| 29 | if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1; |
| 30 | if (substdio_put(&c->ss,key,keylen) == -1) return -1; |
| 31 | if (substdio_put(&c->ss,data,datalen) == -1) return -1; |
| 32 | |
| 33 | h = CDBMAKE_HASHSTART; |
| 34 | for (i = 0;i < keylen;++i) |
| 35 | h = cdbmake_hashadd(h,(unsigned int) key[i]); |
| 36 | |
| 37 | if (!cdbmake_add(&c->cdbm,h,c->pos,alloc)) return -1; |
| 38 | |
| 39 | c->pos += 8 + keylen + datalen; /* XXX: overflow? */ |
| 40 | return 0; |
| 41 | } |
| 42 | |
| 43 | int cdbmss_finish(c) |
| 44 | struct cdbmss *c; |
| 45 | { |
| 46 | int i; |
| 47 | uint32 len; |
| 48 | uint32 u; |
| 49 | |
| 50 | if (!cdbmake_split(&c->cdbm,alloc)) return -1; |
| 51 | |
| 52 | for (i = 0;i < 256;++i) { |
| 53 | len = cdbmake_throw(&c->cdbm,c->pos,i); |
| 54 | for (u = 0;u < len;++u) { |
| 55 | cdbmake_pack(c->packbuf,c->cdbm.hash[u].h); |
| 56 | cdbmake_pack(c->packbuf + 4,c->cdbm.hash[u].p); |
| 57 | if (substdio_put(&c->ss,c->packbuf,8) == -1) return -1; |
| 58 | c->pos += 8; /* XXX: overflow? */ |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | if (substdio_flush(&c->ss) == -1) return -1; |
| 63 | if (seek_begin(c->fd) == -1) return -1; |
| 64 | return substdio_putflush(&c->ss,c->cdbm.final,sizeof(c->cdbm.final)); |
| 65 | } |