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33 * @(#)rec_get.c 8.9 (Berkeley) 8/18/94
34 * $FreeBSD: src/lib/libc/db/recno/rec_get.c,v 1.2.6.2 2001/01/02 09:11:10 obrien Exp $
35 * $DragonFly: src/lib/libcr/db/recno/Attic/rec_get.c,v 1.2 2003/06/17 04:26:42 dillon Exp $
38 #include <sys/types.h>
51 * __REC_GET -- Get a record from the btree.
54 * dbp: pointer to access method
56 * data: data to return
57 * flag: currently unused
60 * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
63 __rec_get(dbp, key, data, flags)
76 /* Toss any page pinned across calls. */
77 if (t->bt_pinned != NULL) {
78 mpool_put(t->bt_mp, t->bt_pinned, 0);
82 /* Get currently doesn't take any flags, and keys of 0 are illegal. */
83 if (flags || (nrec = *(recno_t *)key->data) == 0) {
89 * If we haven't seen this record yet, try to find it in the
92 if (nrec > t->bt_nrecs) {
93 if (F_ISSET(t, R_EOF | R_INMEM))
95 if ((status = t->bt_irec(t, nrec)) != RET_SUCCESS)
100 if ((e = __rec_search(t, nrec, SEARCH)) == NULL)
103 status = __rec_ret(t, e, 0, NULL, data);
104 if (F_ISSET(t, B_DB_LOCK))
105 mpool_put(t->bt_mp, e->page, 0);
107 t->bt_pinned = e->page;
112 * __REC_FPIPE -- Get fixed length records from a pipe.
116 * cnt: records to read
119 * RET_ERROR, RET_SUCCESS
132 if (t->bt_rdata.size < t->bt_reclen) {
133 t->bt_rdata.data = t->bt_rdata.data == NULL ?
134 malloc(t->bt_reclen) :
135 reallocf(t->bt_rdata.data, t->bt_reclen);
136 if (t->bt_rdata.data == NULL)
138 t->bt_rdata.size = t->bt_reclen;
140 data.data = t->bt_rdata.data;
141 data.size = t->bt_reclen;
143 for (nrec = t->bt_nrecs; nrec < top;) {
145 for (p = t->bt_rdata.data;; *p++ = ch)
146 if ((ch = getc(t->bt_rfp)) == EOF || !--len) {
150 memset(p, t->bt_bval, len);
152 nrec, &data, 0) != RET_SUCCESS)
162 return (RET_SPECIAL);
164 return (RET_SUCCESS);
168 * __REC_VPIPE -- Get variable length records from a pipe.
172 * cnt: records to read
175 * RET_ERROR, RET_SUCCESS
190 for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
191 for (p = t->bt_rdata.data,
192 sz = t->bt_rdata.size;; *p++ = ch, --sz) {
193 if ((ch = getc(t->bt_rfp)) == EOF || ch == bval) {
194 data.data = t->bt_rdata.data;
195 data.size = p - (u_char *)t->bt_rdata.data;
196 if (ch == EOF && data.size == 0)
198 if (__rec_iput(t, nrec, &data, 0)
204 len = p - (u_char *)t->bt_rdata.data;
205 t->bt_rdata.size += (sz = 256);
206 t->bt_rdata.data = t->bt_rdata.data == NULL ?
207 malloc(t->bt_rdata.size) :
208 reallocf(t->bt_rdata.data, t->bt_rdata.size);
209 if (t->bt_rdata.data == NULL)
211 p = (u_char *)t->bt_rdata.data + len;
219 return (RET_SPECIAL);
221 return (RET_SUCCESS);
225 * __REC_FMAP -- Get fixed length records from a file.
229 * cnt: records to read
232 * RET_ERROR, RET_SUCCESS
244 if (t->bt_rdata.size < t->bt_reclen) {
245 t->bt_rdata.data = t->bt_rdata.data == NULL ?
246 malloc(t->bt_reclen) :
247 reallocf(t->bt_rdata.data, t->bt_reclen);
248 if (t->bt_rdata.data == NULL)
250 t->bt_rdata.size = t->bt_reclen;
252 data.data = t->bt_rdata.data;
253 data.size = t->bt_reclen;
255 sp = (u_char *)t->bt_cmap;
256 ep = (u_char *)t->bt_emap;
257 for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
260 return (RET_SPECIAL);
263 for (p = t->bt_rdata.data;
264 sp < ep && len > 0; *p++ = *sp++, --len);
266 memset(p, t->bt_bval, len);
267 if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
270 t->bt_cmap = (caddr_t)sp;
271 return (RET_SUCCESS);
275 * __REC_VMAP -- Get variable length records from a file.
279 * cnt: records to read
282 * RET_ERROR, RET_SUCCESS
294 sp = (u_char *)t->bt_cmap;
295 ep = (u_char *)t->bt_emap;
298 for (nrec = t->bt_nrecs; nrec < top; ++nrec) {
301 return (RET_SPECIAL);
303 for (data.data = sp; sp < ep && *sp != bval; ++sp);
304 data.size = sp - (u_char *)data.data;
305 if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS)
309 t->bt_cmap = (caddr_t)sp;
310 return (RET_SUCCESS);