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