Parent: [dd4493] (diff)

Child: [4d1f67] (diff)

Download this file

circache.cpp    1579 lines (1424 with data), 48.4 kB

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
/* Copyright (C) 2009 J.F.Dockes
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef TEST_CIRCACHE
#include "autoconfig.h"
#include <stdio.h>
#include <errno.h>
#include <sys/stat.h>
#include <assert.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <stdlib.h>
#include <memory.h>
#include <zlib.h>
#include <sstream>
#include <iostream>
#include <map>
#include "cstr.h"
#include "circache.h"
#include "conftree.h"
#include "debuglog.h"
#include "smallut.h"
#include "md5.h"
using namespace std;
typedef unsigned char UCHAR;
typedef unsigned int UINT;
typedef unsigned long ULONG;
static bool inflateToDynBuf(void *inp, UINT inlen, void **outpp, UINT *outlenp);
/*
* File structure:
* - Starts with a 1-KB header block, with a param dictionary.
* - Stored items follow. Each item has a header and 2 segments for
* the metadata and the data.
* The segment sizes are stored in the ascii header/marker:
* circacheSizes = xxx yyy zzz
* xxx bytes of metadata
* yyy bytes of data
* zzz bytes of padding up to next object (only one entry has non zero)
*
* There is a write position, which can be at eof while
* the file is growing, or inside the file if we are recycling. This is stored
* in the header (oheadoffs), together with the maximum size
*
* If we are recycling, we have to take care to compute the size of the
* possible remaining area from the last object invalidated by the write,
* pad it with neutral data and store the size in the new header. To help with
* this, the address for the last object written is also kept in the header
* (nheadoffs, npadsize)
*
*/
// First block size
#define CIRCACHE_FIRSTBLOCK_SIZE 1024
// Entry header.
// 3 x 32 bits sizes as hex integers + 1 x 16 bits flag + at least 1 zero
// 15 + 3x(9) + 3 + 1 = 46
static const char *headerformat = "circacheSizes = %x %x %x %hx";
#define CIRCACHE_HEADER_SIZE 64
class EntryHeaderData {
public:
EntryHeaderData() : dicsize(0), datasize(0), padsize(0), flags(0) {}
UINT dicsize;
UINT datasize;
UINT padsize;
unsigned short flags;
};
enum EntryFlags {EFNone = 0, EFDataCompressed = 1};
// A callback class for the header-hopping function.
class CCScanHook {
public:
virtual ~CCScanHook() {}
enum status {Stop, Continue, Error, Eof};
virtual status takeone(off_t offs, const string& udi,
const EntryHeaderData& d) = 0;
};
// We have an auxiliary in-memory multimap of hashed-udi -> offset to
// speed things up. This is created the first time the file is scanned
// (on the first get), and not saved to disk.
// The map key: hashed udi. As a very short hash seems sufficient,
// maybe we could find something faster/simpler than md5?
#define UDIHLEN 4
class UdiH {
public:
UCHAR h[UDIHLEN];
UdiH(const string& udi)
{
MD5_CTX ctx;
MD5Init(&ctx);
MD5Update(&ctx, (const UCHAR*)udi.c_str(), udi.length());
UCHAR md[16];
MD5Final(md, &ctx);
memcpy(h, md, UDIHLEN);
}
string asHexString() const {
static const char hex[]="0123456789abcdef";
string out;
for (int i = 0; i < UDIHLEN; i++) {
out.append(1, hex[h[i] >> 4]);
out.append(1, hex[h[i] & 0x0f]);
}
return out;
}
bool operator==(const UdiH& r) const
{
for (int i = 0; i < UDIHLEN; i++)
if (h[i] != r.h[i])
return false;
return true;
}
bool operator<(const UdiH& r) const
{
for (int i = 0; i < UDIHLEN; i++) {
if (h[i] < r.h[i])
return true;
if (h[i] > r.h[i])
return false;
}
return false;
}
};
typedef multimap<UdiH, off_t> kh_type;
typedef multimap<UdiH, off_t>::value_type kh_value_type;
class CirCacheInternal {
public:
int m_fd;
////// These are cache persistent state and written to the first block:
// Maximum file size, after which we begin reusing old space
off_t m_maxsize;
// Offset of the oldest header, or max file offset (file size)
// while the file is growing. This is the next write position.
off_t m_oheadoffs;
// Offset of last write (newest header)
off_t m_nheadoffs;
// Pad size for newest entry.
int m_npadsize;
// Keep history or only last entry
bool m_uniquentries;
///////////////////// End header entries
// A place to hold data when reading
char *m_buffer;
size_t m_bufsiz;
// Error messages
ostringstream m_reason;
// State for rewind/next/getcurrent operation. This could/should
// be moved to a separate iterator.
off_t m_itoffs;
EntryHeaderData m_ithd;
// Offset cache
kh_type m_ofskh;
bool m_ofskhcplt; // Has cache been fully read since open?
// Add udi->offset translation to map
bool khEnter(const string& udi, off_t ofs)
{
UdiH h(udi);
LOGDEB2(("Circache::khEnter: h %s offs %lu udi [%s]\n",
h.asHexString().c_str(), (ULONG)ofs, udi.c_str()));
pair<kh_type::iterator, kh_type::iterator> p = m_ofskh.equal_range(h);
if (p.first != m_ofskh.end() && p.first->first == h) {
for (kh_type::iterator it = p.first; it != p.second; it++) {
LOGDEB2(("Circache::khEnter: col h %s, ofs %lu\n",
it->first.asHexString().c_str(),
(ULONG)it->second));
if (it->second == ofs) {
// (h,offs) already there. Happens
LOGDEB2(("Circache::khEnter: already there\n"));
return true;
}
}
}
m_ofskh.insert(kh_value_type(h, ofs));
LOGDEB2(("Circache::khEnter: inserted\n"));
return true;
}
void khDump()
{
for (kh_type::const_iterator it = m_ofskh.begin();
it != m_ofskh.end(); it++) {
LOGDEB(("Circache::KHDUMP: %s %d\n",
it->first.asHexString().c_str(), (ULONG)it->second));
}
}
// Return vector of candidate offsets for udi (possibly several
// because there may be hash collisions, and also multiple
// instances).
bool khFind(const string& udi, vector<off_t>& ofss)
{
ofss.clear();
UdiH h(udi);
LOGDEB2(("Circache::khFind: h %s udi [%s]\n",
h.asHexString().c_str(), udi.c_str()));
pair<kh_type::iterator, kh_type::iterator> p = m_ofskh.equal_range(h);
#if 0
if (p.first == m_ofskh.end()) LOGDEB(("KHFIND: FIRST END()\n"));
if (p.second == m_ofskh.end()) LOGDEB(("KHFIND: SECOND END()\n"));
if (!(p.first->first == h))
LOGDEB(("KHFIND: NOKEY: %s %s\n",
p.first->first.asHexString().c_str(),
p.second->first.asHexString().c_str()));
#endif
if (p.first == m_ofskh.end() || !(p.first->first == h))
return false;
for (kh_type::iterator it = p.first; it != p.second; it++) {
ofss.push_back(it->second);
}
return true;
}
// Clear entry for udi/offs
bool khClear(const pair<string, off_t>& ref)
{
UdiH h(ref.first);
pair<kh_type::iterator, kh_type::iterator> p = m_ofskh.equal_range(h);
if (p.first != m_ofskh.end() && (p.first->first == h)) {
for (kh_type::iterator it = p.first; it != p.second; ) {
kh_type::iterator tmp = it++;
if (tmp->second == ref.second)
m_ofskh.erase(tmp);
}
}
return true;
}
// Clear entries for vector of udi/offs
bool khClear(const vector<pair<string, off_t> >& udis)
{
for (vector<pair<string, off_t> >::const_iterator it = udis.begin();
it != udis.end(); it++)
khClear(*it);
return true;
}
// Clear all entries for udi
bool khClear(const string& udi)
{
UdiH h(udi);
pair<kh_type::iterator, kh_type::iterator> p = m_ofskh.equal_range(h);
if (p.first != m_ofskh.end() && (p.first->first == h)) {
for (kh_type::iterator it = p.first; it != p.second; ) {
kh_type::iterator tmp = it++;
m_ofskh.erase(tmp);
}
}
return true;
}
CirCacheInternal()
: m_fd(-1), m_maxsize(-1), m_oheadoffs(-1),
m_nheadoffs(0), m_npadsize(0), m_uniquentries(false),
m_buffer(0), m_bufsiz(0), m_ofskhcplt(false)
{}
~CirCacheInternal()
{
if (m_fd >= 0)
close(m_fd);
if (m_buffer)
free(m_buffer);
}
char *buf(size_t sz)
{
if (m_bufsiz >= sz)
return m_buffer;
if ((m_buffer = (char *)realloc(m_buffer, sz))) {
m_bufsiz = sz;
} else {
m_reason << "CirCache:: realloc(" << sz << ") failed";
m_bufsiz = 0;
}
return m_buffer;
}
// Name for the cache file
string datafn(const string& d)
{
return path_cat(d, "circache.crch");
}
bool writefirstblock()
{
if (m_fd < 0) {
m_reason << "writefirstblock: not open ";
return false;
}
ostringstream s;
s <<
"maxsize = " << m_maxsize << "\n" <<
"oheadoffs = " << m_oheadoffs << "\n" <<
"nheadoffs = " << m_nheadoffs << "\n" <<
"npadsize = " << m_npadsize << "\n" <<
"unient = " << m_uniquentries << "\n" <<
" " <<
" " <<
" " <<
"\0";
int sz = int(s.str().size());
assert(sz < CIRCACHE_FIRSTBLOCK_SIZE);
lseek(m_fd, 0, 0);
if (write(m_fd, s.str().c_str(), sz) != sz) {
m_reason << "writefirstblock: write() failed: errno " << errno;
return false;
}
return true;
}
bool readfirstblock()
{
if (m_fd < 0) {
m_reason << "readfirstblock: not open ";
return false;
}
char bf[CIRCACHE_FIRSTBLOCK_SIZE];
lseek(m_fd, 0, 0);
if (read(m_fd, bf, CIRCACHE_FIRSTBLOCK_SIZE) !=
CIRCACHE_FIRSTBLOCK_SIZE) {
m_reason << "readfirstblock: read() failed: errno " << errno;
return false;
}
string s(bf, CIRCACHE_FIRSTBLOCK_SIZE);
ConfSimple conf(s, 1);
string value;
if (!conf.get("maxsize", value, cstr_null)) {
m_reason << "readfirstblock: conf get maxsize failed";
return false;
}
m_maxsize = atoll(value.c_str());
if (!conf.get("oheadoffs", value, cstr_null)) {
m_reason << "readfirstblock: conf get oheadoffs failed";
return false;
}
m_oheadoffs = atoll(value.c_str());
if (!conf.get("nheadoffs", value, cstr_null)) {
m_reason << "readfirstblock: conf get nheadoffs failed";
return false;
}
m_nheadoffs = atoll(value.c_str());
if (!conf.get("npadsize", value, cstr_null)) {
m_reason << "readfirstblock: conf get npadsize failed";
return false;
}
m_npadsize = atoll(value.c_str());
if (!conf.get("unient", value, cstr_null)) {
m_uniquentries = false;
} else {
m_uniquentries = stringToBool(value);
}
return true;
}
bool writeEntryHeader(off_t offset, const EntryHeaderData& d)
{
if (m_fd < 0) {
m_reason << "writeEntryHeader: not open ";
return false;
}
char bf[CIRCACHE_HEADER_SIZE];
memset(bf, 0, CIRCACHE_HEADER_SIZE);
snprintf(bf, CIRCACHE_HEADER_SIZE,
headerformat, d.dicsize, d.datasize, d.padsize, d.flags);
if (lseek(m_fd, offset, 0) != offset) {
m_reason << "CirCache::weh: lseek(" << offset <<
") failed: errno " << errno;
return false;
}
if (write(m_fd, bf, CIRCACHE_HEADER_SIZE) != CIRCACHE_HEADER_SIZE) {
m_reason << "CirCache::weh: write failed. errno " << errno;
return false;
}
return true;
}
CCScanHook::status readEntryHeader(off_t offset, EntryHeaderData& d)
{
if (m_fd < 0) {
m_reason << "readEntryHeader: not open ";
return CCScanHook::Error;
}
if (lseek(m_fd, offset, 0) != offset) {
m_reason << "readEntryHeader: lseek(" << offset <<
") failed: errno " << errno;
return CCScanHook::Error;
}
char bf[CIRCACHE_HEADER_SIZE];
int ret = read(m_fd, bf, CIRCACHE_HEADER_SIZE);
if (ret == 0) {
// Eof
m_reason << " Eof ";
return CCScanHook::Eof;
}
if (ret != CIRCACHE_HEADER_SIZE) {
m_reason << " readheader: read failed errno " << errno;
return CCScanHook::Error;
}
if (sscanf(bf, headerformat, &d.dicsize, &d.datasize,
&d.padsize, &d.flags) != 4) {
m_reason << " readEntryHeader: bad header at " <<
offset << " [" << bf << "]";
return CCScanHook::Error;
}
LOGDEB2(("Circache:readEntryHeader: dcsz %u dtsz %u pdsz %u flgs %hu\n",
d.dicsize, d.datasize, d.padsize, d.flags));
return CCScanHook::Continue;
}
CCScanHook::status scan(off_t startoffset, CCScanHook *user,
bool fold = false)
{
if (m_fd < 0) {
m_reason << "scan: not open ";
return CCScanHook::Error;
}
off_t so0 = startoffset;
bool already_folded = false;
while (true) {
if (already_folded && startoffset == so0) {
m_ofskhcplt = true;
return CCScanHook::Eof;
}
EntryHeaderData d;
CCScanHook::status st;
switch ((st = readEntryHeader(startoffset, d))) {
case CCScanHook::Continue: break;
case CCScanHook::Eof:
if (fold && !already_folded) {
already_folded = true;
startoffset = CIRCACHE_FIRSTBLOCK_SIZE;
continue;
}
/* FALLTHROUGH */
default:
return st;
}
string udi;
if (d.dicsize) {
// d.dicsize is 0 for erased entries
char *bf;
if ((bf = buf(d.dicsize+1)) == 0) {
return CCScanHook::Error;
}
bf[d.dicsize] = 0;
if (read(m_fd, bf, d.dicsize) != int(d.dicsize)) {
m_reason << "scan: read failed errno " << errno;
return CCScanHook::Error;
}
string b(bf, d.dicsize);
ConfSimple conf(b, 1);
if (!conf.get("udi", udi, cstr_null)) {
m_reason << "scan: no udi in dic";
return CCScanHook::Error;
}
khEnter(udi, startoffset);
}
// Call callback
CCScanHook::status a =
user->takeone(startoffset, udi, d);
switch (a) {
case CCScanHook::Continue:
break;
default:
return a;
}
startoffset += CIRCACHE_HEADER_SIZE + d.dicsize +
d.datasize + d.padsize;
}
}
bool readHUdi(off_t hoffs, EntryHeaderData& d, string& udi)
{
if (readEntryHeader(hoffs, d) != CCScanHook::Continue)
return false;
string dic;
if (!readDicData(hoffs, d, dic, 0))
return false;
if (d.dicsize == 0) {
// This is an erased entry
udi.erase();
return true;
}
ConfSimple conf(dic);
if (!conf.get("udi", udi)) {
m_reason << "Bad file: no udi in dic";
return false;
}
return true;
}
bool readDicData(off_t hoffs, EntryHeaderData& hd, string& dic,
string* data)
{
off_t offs = hoffs + CIRCACHE_HEADER_SIZE;
// This syscall could be avoided in some cases if we saved the offset
// at each seek. In most cases, we just read the header and we are
// at the right position
if (lseek(m_fd, offs, 0) != offs) {
m_reason << "CirCache::get: lseek(" << offs << ") failed: " <<
errno;
return false;
}
char *bf = 0;
if (hd.dicsize) {
bf = buf(hd.dicsize);
if (bf == 0)
return false;
if (read(m_fd, bf, hd.dicsize) != int(hd.dicsize)) {
m_reason << "CirCache::get: read() failed: errno " << errno;
return false;
}
dic.assign(bf, hd.dicsize);
} else {
dic.erase();
}
if (data == 0)
return true;
if (hd.datasize) {
bf = buf(hd.datasize);
if (bf == 0)
return false;
if (read(m_fd, bf, hd.datasize) != int(hd.datasize)){
m_reason << "CirCache::get: read() failed: errno " << errno;
return false;
}
if (hd.flags & EFDataCompressed) {
LOGDEB1(("Circache:readdicdata: data compressed\n"));
void *uncomp;
unsigned int uncompsize;
if (!inflateToDynBuf(bf, hd.datasize, &uncomp, &uncompsize)) {
m_reason << "CirCache: decompression failed ";
return false;
}
data->assign((char *)uncomp, uncompsize);
free(uncomp);
} else {
LOGDEB1(("Circache:readdicdata: data NOT compressed\n"));
data->assign(bf, hd.datasize);
}
} else {
data->erase();
}
return true;
}
};
CirCache::CirCache(const string& dir)
: m_dir(dir)
{
m_d = new CirCacheInternal;
LOGDEB0(("CirCache: [%s]\n", m_dir.c_str()));
}
CirCache::~CirCache()
{
delete m_d;
m_d = 0;
}
string CirCache::getReason()
{
return m_d ? m_d->m_reason.str() : "Not initialized";
}
// A scan callback which just records the last header offset and
// padsize seen. This is used with a scan(nofold) to find the last
// physical record in the file
class CCScanHookRecord : public CCScanHook {
public:
off_t headoffs;
off_t padsize;
CCScanHookRecord()
: headoffs(0), padsize(0)
{
}
virtual status takeone(off_t offs, const string& udi,
const EntryHeaderData& d)
{
headoffs = offs;
padsize = d.padsize;
LOGDEB2(("CCScanHookRecord::takeone: offs %lld padsize %lld\n",
headoffs, padsize));
return Continue;
}
};
string CirCache::getpath()
{
return m_d->datafn(m_dir);
}
bool CirCache::create(off_t maxsize, int flags)
{
LOGDEB(("CirCache::create: [%s] maxsz %lld flags 0x%x\n",
m_dir.c_str(), maxsize, flags));
if (m_d == 0) {
LOGERR(("CirCache::create: null data\n"));
return false;
}
struct stat st;
if (stat(m_dir.c_str(), &st) < 0) {
// Directory does not exist, create it
if (mkdir(m_dir.c_str(), 0777) < 0) {
m_d->m_reason << "CirCache::create: mkdir(" << m_dir <<
") failed" << " errno " << errno;
return false;
}
} else {
// If the file exists too, and truncate is not set, switch
// to open-mode. Still may need to update header params.
if (access(m_d->datafn(m_dir).c_str(), 0) >= 0 &&
!(flags & CC_CRTRUNCATE)) {
if (!open(CC_OPWRITE)) {
return false;
}
if (maxsize == m_d->m_maxsize &&
((flags & CC_CRUNIQUE) != 0) == m_d->m_uniquentries) {
LOGDEB(("Header unchanged, no rewrite\n"));
return true;
}
// If the new maxsize is bigger than current size, we need
// to stop recycling if this is what we are doing.
if (maxsize > m_d->m_maxsize && maxsize > st.st_size) {
// Scan the file to find the last physical record. The
// ohead is set at physical eof, and nhead is the last
// scanned record
CCScanHookRecord rec;
m_d->scan(CIRCACHE_FIRSTBLOCK_SIZE, &rec, false);
m_d->m_oheadoffs = lseek(m_d->m_fd, 0, SEEK_END);
m_d->m_nheadoffs = rec.headoffs;
m_d->m_npadsize = rec.padsize;
}
m_d->m_maxsize = maxsize;
m_d->m_uniquentries = ((flags & CC_CRUNIQUE) != 0);
LOGDEB(("CirCache::create: rewriting header with "
"maxsize %lld oheadoffs %lld nheadoffs %lld "
"npadsize %d unient %d\n",
m_d->m_maxsize, m_d->m_oheadoffs, m_d->m_nheadoffs,
m_d->m_npadsize, int(m_d->m_uniquentries)));
return m_d->writefirstblock();
}
// Else fallthrough to create file
}
if ((m_d->m_fd = ::open(m_d->datafn(m_dir).c_str(),
O_CREAT | O_RDWR | O_TRUNC, 0666)) < 0) {
m_d->m_reason << "CirCache::create: open/creat(" <<
m_d->datafn(m_dir) << ") failed " << "errno " << errno;
return false;
}
m_d->m_maxsize = maxsize;
m_d->m_oheadoffs = CIRCACHE_FIRSTBLOCK_SIZE;
m_d->m_uniquentries = ((flags & CC_CRUNIQUE) != 0);
char buf[CIRCACHE_FIRSTBLOCK_SIZE];
memset(buf, 0, CIRCACHE_FIRSTBLOCK_SIZE);
if (::write(m_d->m_fd, buf, CIRCACHE_FIRSTBLOCK_SIZE) !=
CIRCACHE_FIRSTBLOCK_SIZE) {
m_d->m_reason << "CirCache::create: write header failed, errno "
<< errno;
return false;
}
return m_d->writefirstblock();
}
bool CirCache::open(OpMode mode)
{
if (m_d == 0) {
LOGERR(("CirCache::open: null data\n"));
return false;
}
if (m_d->m_fd >= 0)
::close(m_d->m_fd);
if ((m_d->m_fd = ::open(m_d->datafn(m_dir).c_str(),
mode == CC_OPREAD ? O_RDONLY : O_RDWR)) < 0) {
m_d->m_reason << "CirCache::open: open(" << m_d->datafn(m_dir) <<
") failed " << "errno " << errno;
return false;
}
return m_d->readfirstblock();
}
class CCScanHookDump : public CCScanHook {
public:
virtual status takeone(off_t offs, const string& udi,
const EntryHeaderData& d)
{
cout << "Scan: offs " << offs << " dicsize " << d.dicsize
<< " datasize " << d.datasize << " padsize " << d.padsize <<
" flags " << d.flags <<
" udi [" << udi << "]" << endl;
return Continue;
}
};
bool CirCache::dump()
{
CCScanHookDump dumper;
// Start at oldest header. This is eof while the file is growing, scan will
// fold to bot at once.
off_t start = m_d->m_oheadoffs;
switch (m_d->scan(start, &dumper, true)) {
case CCScanHook::Stop:
cout << "Scan returns Stop??" << endl;
return false;
case CCScanHook::Continue:
cout << "Scan returns Continue ?? " << CCScanHook::Continue << " " <<
getReason() << endl;
return false;
case CCScanHook::Error:
cout << "Scan returns Error: " << getReason() << endl;
return false;
case CCScanHook::Eof:
cout << "Scan returns Eof (ok)" << endl;
return true;
default:
cout << "Scan returns Unknown ??" << endl;
return false;
}
}
class CCScanHookGetter : public CCScanHook {
public:
string m_udi;
int m_targinstance;
int m_instance;
off_t m_offs;
EntryHeaderData m_hd;
CCScanHookGetter(const string &udi, int ti)
: m_udi(udi), m_targinstance(ti), m_instance(0), m_offs(0){}
virtual status takeone(off_t offs, const string& udi,
const EntryHeaderData& d)
{
LOGDEB2(("Circache:Scan: off %ld udi [%s] dcsz %u dtsz %u pdsz %u "
" flgs %hu\n",
long(offs), udi.c_str(), (UINT)d.dicsize,
(UINT)d.datasize, (UINT)d.padsize, d.flags));
if (!m_udi.compare(udi)) {
m_instance++;
m_offs = offs;
m_hd = d;
if (m_instance == m_targinstance)
return Stop;
}
return Continue;
}
};
// instance == -1 means get latest. Otherwise specify from 1+
bool CirCache::get(const string& udi, string& dic, string& data, int instance)
{
Chrono chron;
if (m_d->m_fd < 0) {
m_d->m_reason << "CirCache::get: no data or not open";
return false;
}
LOGDEB0(("CirCache::get: udi [%s], instance %d\n", udi.c_str(), instance));
// If memory map is up to date, use it:
if (m_d->m_ofskhcplt) {
LOGDEB1(("CirCache::get: using ofskh\n"));
//m_d->khDump();
vector<off_t> ofss;
if (m_d->khFind(udi, ofss)) {
LOGDEB1(("Circache::get: h found, colls %d\n", ofss.size()));
int finst = 1;
EntryHeaderData d_good;
off_t o_good = 0;
for (vector<off_t>::iterator it = ofss.begin();
it != ofss.end(); it++) {
LOGDEB1(("Circache::get: trying offs %lu\n", (ULONG)*it));
EntryHeaderData d;
string fudi;
if (!m_d->readHUdi(*it, d, fudi))
return false;
if (!fudi.compare(udi)) {
// Found one, memorize offset. Done if instance
// matches, else go on. If instance is -1 need to
// go to the end anyway
d_good = d;
o_good = *it;
if (finst == instance) {
break;
} else {
finst++;
}
}
}
// Did we read an appropriate entry ?
if (o_good != 0 && (instance == -1 || instance == finst)) {
bool ret = m_d->readDicData(o_good, d_good, dic, &data);
LOGDEB0(("Circache::get: hfound, %d mS\n",
chron.millis()));
return ret;
}
// Else try to scan anyway.
}
}
CCScanHookGetter getter(udi, instance);
off_t start = m_d->m_oheadoffs;
CCScanHook::status ret = m_d->scan(start, &getter, true);
if (ret == CCScanHook::Eof) {
if (getter.m_instance == 0)
return false;
} else if (ret != CCScanHook::Stop) {
return false;
}
bool bret =
m_d->readDicData(getter.m_offs, getter.m_hd, dic, &data);
LOGDEB0(("Circache::get: scanfound, %d mS\n", chron.millis()));
return bret;
}
bool CirCache::erase(const string& udi)
{
if (m_d == 0) {
LOGERR(("CirCache::erase: null data\n"));
return false;
}
if (m_d->m_fd < 0) {
m_d->m_reason << "CirCache::erase: no data or not open";
return false;
}
LOGDEB0(("CirCache::erase: udi [%s]\n", udi.c_str()));
// If the mem cache is not up to date, update it, we're too lazy
// to do a scan
if (!m_d->m_ofskhcplt) {
string dic, data;
get("nosuchudi probably exists", dic, data);
if (!m_d->m_ofskhcplt) {
LOGERR(("CirCache::erase : cache not updated after get\n"));
return false;
}
}
vector<off_t> ofss;
if (!m_d->khFind(udi, ofss)) {
// Udi not in there, erase ok
LOGDEB(("CirCache::erase: khFind returns none\n"));
return true;
}
for (vector<off_t>::iterator it = ofss.begin(); it != ofss.end(); it++) {
LOGDEB(("CirCache::erase: reading at %lu\n", (unsigned long)*it));
EntryHeaderData d;
string fudi;
if (!m_d->readHUdi(*it, d, fudi))
return false;
LOGDEB(("CirCache::erase: found fudi [%s]\n", fudi.c_str()));
if (!fudi.compare(udi)) {
EntryHeaderData nd;
nd.padsize = d.dicsize + d.datasize + d.padsize;
LOGDEB(("CirCache::erase: rewriting at %lu\n", (unsigned long)*it));
if (*it == m_d->m_nheadoffs)
m_d->m_npadsize = nd.padsize;
if(!m_d->writeEntryHeader(*it, nd)) {
LOGERR(("CirCache::erase: write header failed\n"));
return false;
}
}
}
m_d->khClear(udi);
return true;
}
// Used to scan the file ahead until we accumulated enough space for the new
// entry.
class CCScanHookSpacer : public CCScanHook {
public:
UINT sizewanted;
UINT sizeseen;
vector<pair<string, off_t> > squashed_udis;
CCScanHookSpacer(int sz)
: sizewanted(sz), sizeseen(0) {assert(sz > 0);}
virtual status takeone(off_t offs, const string& udi,
const EntryHeaderData& d)
{
LOGDEB2(("Circache:ScanSpacer:off %u dcsz %u dtsz %u pdsz %u udi[%s]\n",
(UINT)offs, d.dicsize, d.datasize, d.padsize, udi.c_str()));
sizeseen += CIRCACHE_HEADER_SIZE + d.dicsize + d.datasize + d.padsize;
squashed_udis.push_back(make_pair(udi, offs));
if (sizeseen >= sizewanted)
return Stop;
return Continue;
}
};
bool CirCache::put(const string& udi, const ConfSimple *iconf,
const string& data, unsigned int iflags)
{
if (m_d == 0) {
LOGERR(("CirCache::put: null data\n"));
return false;
}
if (m_d->m_fd < 0) {
m_d->m_reason << "CirCache::put: no data or not open";
return false;
}
// We need the udi in input metadata
string dic;
if (!iconf || !iconf->get("udi", dic) || dic.empty() || dic.compare(udi)) {
m_d->m_reason << "No/bad 'udi' entry in input dic";
LOGERR(("Circache::put: no/bad udi: DIC:[%s] UDI [%s]\n",
dic.c_str(), udi.c_str()));
return false;
}
// Possibly erase older entries. Need to do this first because we may be
// able to reuse the space if the same udi was last written
if (m_d->m_uniquentries && !erase(udi)) {
LOGERR(("CirCache::put: can't erase older entries\n"));
return false;
}
ostringstream s;
iconf->write(s);
dic = s.str();
// Data compression ?
const char *datap = data.c_str();
unsigned int datalen = data.size();
unsigned short flags = 0;
TempBuf compbuf;
if (!(iflags & NoCompHint)) {
ULONG len = compressBound(data.size());
char *bf = compbuf.setsize(len);
if (bf != 0 &&
compress((Bytef*)bf, &len, (Bytef*)data.c_str(), data.size())
== Z_OK) {
if (float(len) < 0.9 * float(data.size())) {
// bf is local but it's our static buffer address
datap = bf;
datalen = len;
flags |= EFDataCompressed;
}
}
}
struct stat st;
if (fstat(m_d->m_fd, &st) < 0) {
m_d->m_reason << "CirCache::put: fstat failed. errno " << errno;
return false;
}
// Characteristics for the new entry.
int nsize = CIRCACHE_HEADER_SIZE + dic.size() + datalen;
int nwriteoffs = m_d->m_oheadoffs;
int npadsize = 0;
bool extending = false;
LOGDEB(("CirCache::put: nsz %d oheadoffs %d\n", nsize, m_d->m_oheadoffs));
// Check if we can recover some pad space from the (physically) previous
// entry.
int recovpadsize = m_d->m_oheadoffs == CIRCACHE_FIRSTBLOCK_SIZE ?
0 : m_d->m_npadsize;
if (recovpadsize != 0) {
// Need to read the latest entry's header, to rewrite it with a
// zero pad size
EntryHeaderData pd;
if (m_d->readEntryHeader(m_d->m_nheadoffs, pd) != CCScanHook::Continue){
return false;
}
if (int(pd.padsize) != m_d->m_npadsize) {
m_d->m_reason << "CirCache::put: logic error: bad padsize ";
return false;
}
if (pd.dicsize == 0) {
// erased entry. Also recover the header space, no need to rewrite
// the header, we're going to write on it.
recovpadsize += CIRCACHE_HEADER_SIZE;
} else {
LOGDEB(("CirCache::put: recov. prev. padsize %d\n", pd.padsize));
pd.padsize = 0;
if (!m_d->writeEntryHeader(m_d->m_nheadoffs, pd))
return false;
// If we fail between here and the end, the file is broken.
}
nwriteoffs = m_d->m_oheadoffs - recovpadsize;
}
if (nsize <= recovpadsize) {
// If the new entry fits entirely in the pad area from the
// latest one, no need to recycle stuff
LOGDEB(("CirCache::put: new fits in old padsize %d\n", recovpadsize));
npadsize = recovpadsize - nsize;
} else if (st.st_size < m_d->m_maxsize) {
// Still growing the file.
npadsize = 0;
extending = true;
} else {
// Scan the file until we have enough space for the new entry,
// and determine the pad size up to the 1st preserved entry
int scansize = nsize - recovpadsize;
LOGDEB(("CirCache::put: scanning for size %d from offs %u\n",
scansize, (UINT)m_d->m_oheadoffs));
CCScanHookSpacer spacer(scansize);
switch (m_d->scan(m_d->m_oheadoffs, &spacer)) {
case CCScanHook::Stop:
LOGDEB(("CirCache::put: Scan ok, sizeseen %d\n",
spacer.sizeseen));
npadsize = spacer.sizeseen - scansize;
break;
case CCScanHook::Eof:
npadsize = 0;
extending = true;
break;
case CCScanHook::Continue:
case CCScanHook::Error:
return false;
}
// Take the recycled entries off the multimap
m_d->khClear(spacer.squashed_udis);
}
LOGDEB(("CirCache::put: writing %d at %d padsize %d\n",
nsize, nwriteoffs, npadsize));
if (lseek(m_d->m_fd, nwriteoffs, 0) != nwriteoffs) {
m_d->m_reason << "CirCache::put: lseek failed: " << errno;
return false;
}
char head[CIRCACHE_HEADER_SIZE];
memset(head, 0, CIRCACHE_HEADER_SIZE);
snprintf(head, CIRCACHE_HEADER_SIZE,
headerformat, dic.size(), datalen, npadsize, flags);
struct iovec vecs[3];
vecs[0].iov_base = head;
vecs[0].iov_len = CIRCACHE_HEADER_SIZE;
vecs[1].iov_base = (void *)dic.c_str();
vecs[1].iov_len = dic.size();
vecs[2].iov_base = (void *)datap;
vecs[2].iov_len = datalen;
if (writev(m_d->m_fd, vecs, 3) != nsize) {
m_d->m_reason << "put: write failed. errno " << errno;
if (extending)
if (ftruncate(m_d->m_fd, m_d->m_oheadoffs) == -1) {
m_d->m_reason << "put: ftruncate failed. errno " << errno;
}
return false;
}
m_d->khEnter(udi, nwriteoffs);
// Update first block information
m_d->m_nheadoffs = nwriteoffs;
m_d->m_npadsize = npadsize;
// New oldest header is the one just after the one we just wrote.
m_d->m_oheadoffs = nwriteoffs + nsize + npadsize;
if (nwriteoffs + nsize >= m_d->m_maxsize) {
// Max size or top of file reached, next write at BOT.
m_d->m_oheadoffs = CIRCACHE_FIRSTBLOCK_SIZE;
}
return m_d->writefirstblock();
}
bool CirCache::rewind(bool& eof)
{
if (m_d == 0) {
LOGERR(("CirCache::rewind: null data\n"));
return false;
}
eof = false;
off_t fsize = lseek(m_d->m_fd, 0, SEEK_END);
if (fsize == (off_t)-1) {
LOGERR(("CirCache::rewind: seek to EOF failed\n"));
return false;
}
// Read oldest header. This is either at the position pointed to
// by oheadoffs, or after the first block if the file is still
// growing.
if (m_d->m_oheadoffs == fsize) {
m_d->m_itoffs = CIRCACHE_FIRSTBLOCK_SIZE;
} else {
m_d->m_itoffs = m_d->m_oheadoffs;
}
CCScanHook::status st = m_d->readEntryHeader(m_d->m_itoffs, m_d->m_ithd);
switch(st) {
case CCScanHook::Eof:
eof = true;
return false;
case CCScanHook::Continue:
return true;
default:
return false;
}
}
bool CirCache::next(bool& eof)
{
if (m_d == 0) {
LOGERR(("CirCache::next: null data\n"));
return false;
}
eof = false;
// Skip to next header, using values stored from previous one
m_d->m_itoffs += CIRCACHE_HEADER_SIZE + m_d->m_ithd.dicsize +
m_d->m_ithd.datasize + m_d->m_ithd.padsize;
// Looped back ?
if (m_d->m_itoffs == m_d->m_oheadoffs) {
eof = true;
return false;
}
// Read. If we hit physical eof, fold.
CCScanHook::status st = m_d->readEntryHeader(m_d->m_itoffs, m_d->m_ithd);
if (st == CCScanHook::Eof) {
m_d->m_itoffs = CIRCACHE_FIRSTBLOCK_SIZE;
if (m_d->m_itoffs == m_d->m_oheadoffs) {
// Then the file is not folded yet (still growing)
eof = true;
return false;
}
st = m_d->readEntryHeader(m_d->m_itoffs, m_d->m_ithd);
}
if (st == CCScanHook::Continue)
return true;
return false;
}
bool CirCache::getCurrentUdi(string& udi)
{
if (m_d == 0) {
LOGERR(("CirCache::getCurrentUdi: null data\n"));
return false;
}
if (!m_d->readHUdi(m_d->m_itoffs, m_d->m_ithd, udi))
return false;
return true;
}
bool CirCache::getCurrent(string& udi, string& dic, string& data)
{
if (m_d == 0) {
LOGERR(("CirCache::getCurrent: null data\n"));
return false;
}
if (!m_d->readDicData(m_d->m_itoffs, m_d->m_ithd, dic, &data))
return false;
ConfSimple conf(dic, 1);
conf.get("udi", udi, cstr_null);
return true;
}
static void *allocmem(
void *cp, /* The array to grow. may be NULL */
int sz, /* Unit size in bytes */
int *np, /* Pointer to current allocation number */
int min, /* Number to allocate the first time */
int maxinc) /* Maximum increment */
{
if (cp == 0) {
cp = malloc(min * sz);
*np = cp ? min : 0;
return cp;
}
int inc = (*np > maxinc) ? maxinc : *np;
if ((cp = realloc(cp, (*np + inc) * sz)) != 0)
*np += inc;
return cp;
}
static bool inflateToDynBuf(void* inp, UINT inlen, void **outpp, UINT *outlenp)
{
z_stream d_stream; /* decompression stream */
LOGDEB0(("inflateToDynBuf: inlen %u\n", inlen));
d_stream.zalloc = (alloc_func)0;
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
// Compression works well on html files, 4-6 is quite common, Otoh we
// maybe passed a big, little if at all compressed image or pdf file,
// So we set the initial allocation at 3 times the input size
const int imul = 3;
const int mxinc = 20;
char *outp = 0;
int alloc = 0;
d_stream.next_in = (Bytef*)inp;
d_stream.avail_in = inlen;
d_stream.next_out = 0;
d_stream.avail_out = 0;
int err;
if ((err = inflateInit(&d_stream)) != Z_OK) {
LOGERR(("Inflate: inflateInit: err %d msg %s\n", err, d_stream.msg));
free(outp);
return false;
}
for (;;) {
LOGDEB2(("InflateToDynBuf: avail_in %d total_in %d avail_out %d "
"total_out %d\n", d_stream.avail_in, d_stream.total_in,
d_stream.avail_out, d_stream.total_out));
if (d_stream.avail_out == 0) {
if ((outp = (char*)allocmem(outp, inlen, &alloc,
imul, mxinc)) == 0) {
LOGERR(("Inflate: out of memory, current alloc %d\n",
alloc*inlen));
inflateEnd(&d_stream);
return false;
} else {
LOGDEB2(("inflateToDynBuf: realloc(%d) ok\n", alloc * inlen));
}
d_stream.avail_out = alloc * inlen - d_stream.total_out;
d_stream.next_out = (Bytef*)(outp + d_stream.total_out);
}
err = inflate(&d_stream, Z_NO_FLUSH);
if (err == Z_STREAM_END) break;
if (err != Z_OK) {
LOGERR(("Inflate: error %d msg %s\n", err, d_stream.msg));
inflateEnd(&d_stream);
free(outp);
return false;
}
}
*outlenp = d_stream.total_out;
*outpp = (Bytef *)outp;
if ((err = inflateEnd(&d_stream)) != Z_OK) {
LOGERR(("Inflate: inflateEnd error %d msg %s\n", err, d_stream.msg));
return false;
}
LOGDEB0(("inflateToDynBuf: ok, output size %d\n", d_stream.total_out));
return true;
}
#else // TEST ->
#include "autoconfig.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string>
#include <iostream>
#include "circache.h"
#include "fileudi.h"
#include "conftree.h"
#include "readfile.h"
#include "debuglog.h"
using namespace std;
bool resizecc(const string& dir, int newmbs)
{
RefCntr<CirCache> occ(new CirCache(dir));
string ofn = occ->getpath();
string backupfn = ofn + ".orig";
if (access(backupfn.c_str(), 0) >= 0) {
cerr << "Backup file " << backupfn <<
" exists, please move it out of the way" << endl;
return false;
}
if (!occ->open(CirCache::CC_OPWRITE)) {
cerr << "Open failed in " << dir << " : " << occ->getReason() << endl;
return false;
}
string tmpdir = path_cat(dir, "tmp");
if (access(tmpdir.c_str(), 0) < 0) {
if (mkdir(tmpdir.c_str(), 0700) < 0) {
cerr << "Cant create temporary directory " << tmpdir << " ";
perror("mkdir");
return false;
}
}
RefCntr<CirCache> ncc(new CirCache(tmpdir));
string nfn = ncc->getpath();
if (!ncc->create(off_t(newmbs) * 1000 * 1024,
CirCache::CC_CRUNIQUE | CirCache::CC_CRTRUNCATE)) {
cerr << "Cant create new file in " << tmpdir << " : " <<
ncc->getReason() << endl;
return false;
}
bool eof = false;
if (!occ->rewind(eof)) {
if (!eof) {
cerr << "Initial rewind failed" << endl;
return false;
}
}
int nentries = 0;
while (!eof) {
string udi, sdic, data;
if (!occ->getCurrent(udi, sdic, data)) {
cerr << "getCurrent failed: " << occ->getReason() << endl;
return false;
}
// Shouldn't getcurrent deal with this ?
if (sdic.size() == 0) {
//cerr << "Skip empty entry" << endl;
occ->next(eof);
continue;
}
ConfSimple dic(sdic);
if (!dic.ok()) {
cerr << "Could not parse entry attributes dic" << endl;
return false;
}
//cerr << "UDI: " << udi << endl;
if (!ncc->put(udi, &dic, data)) {
cerr << "put failed: " << ncc->getReason() << " sdic [" << sdic <<
"]" << endl;
return false;
}
nentries++;
occ->next(eof);
}
// Done with our objects here, there is no close() method, so delete them
occ.release();
ncc.release();
if (rename(ofn.c_str(), backupfn.c_str()) < 0) {
cerr << "Could not create backup " << backupfn << " : ";
perror("rename");
return false;
}
cout << "Created backup file " << backupfn << endl;
if (rename(nfn.c_str(), ofn.c_str()) < 0) {
cerr << "Could not rename new file from " << nfn << " to " << ofn << " : ";
perror("rename");
return false;
}
cout << "Resize done, copied " << nentries << " entries " << endl;
return true;
}
static char *thisprog;
static char usage [] =
" -c [-u] <dirname> : create\n"
" -p <dirname> <apath> [apath ...] : put files\n"
" -d <dirname> : dump\n"
" -g [-i instance] [-D] <dirname> <udi>: get\n"
" -D: also dump data\n"
" -e <dirname> <udi> : erase\n"
" -s <dirname> <newmbs> : resize\n"
;
static void
Usage(FILE *fp = stderr)
{
fprintf(fp, "%s: usage:\n%s", thisprog, usage);
exit(1);
}
static int op_flags;
#define OPT_MOINS 0x1
#define OPT_c 0x2
#define OPT_p 0x8
#define OPT_g 0x10
#define OPT_d 0x20
#define OPT_i 0x40
#define OPT_D 0x80
#define OPT_u 0x100
#define OPT_e 0x200
#define OPT_s 0x400
int main(int argc, char **argv)
{
int instance = -1;
thisprog = argv[0];
argc--; argv++;
while (argc > 0 && **argv == '-') {
(*argv)++;
if (!(**argv))
/* Cas du "adb - core" */
Usage();
while (**argv)
switch (*(*argv)++) {
case 'c': op_flags |= OPT_c; break;
case 'D': op_flags |= OPT_D; break;
case 'd': op_flags |= OPT_d; break;
case 'e': op_flags |= OPT_e; break;
case 'g': op_flags |= OPT_g; break;
case 'i': op_flags |= OPT_i; if (argc < 2) Usage();
if ((sscanf(*(++argv), "%d", &instance)) != 1)
Usage();
argc--;
goto b1;
case 'p': op_flags |= OPT_p; break;
case 's': op_flags |= OPT_s; break;
case 'u': op_flags |= OPT_u; break;
default: Usage(); break;
}
b1: argc--; argv++;
}
DebugLog::getdbl()->setloglevel(DEBERR);
DebugLog::setfilename("stderr");
if (argc < 1)
Usage();
string dir = *argv++;argc--;
CirCache cc(dir);
if (op_flags & OPT_c) {
int flags = 0;
if (op_flags & OPT_u)
flags |= CirCache::CC_CRUNIQUE;
if (!cc.create(100*1024, flags)) {
cerr << "Create failed:" << cc.getReason() << endl;
exit(1);
}
} else if (op_flags & OPT_s) {
if (argc != 1) {
Usage();
}
int newmbs = atoi(*argv++);argc--;
if (!resizecc(dir, newmbs)) {
exit(1);
}
} else if (op_flags & OPT_p) {
if (argc < 1)
Usage();
if (!cc.open(CirCache::CC_OPWRITE)) {
cerr << "Open failed: " << cc.getReason() << endl;
exit(1);
}
while (argc) {
string fn = *argv++;argc--;
char dic[1000];
string data, reason;
if (!file_to_string(fn, data, &reason)) {
cerr << "File_to_string: " << reason << endl;
exit(1);
}
string udi;
make_udi(fn, "", udi);
sprintf(dic, "#whatever...\nmimetype = text/plain\nudi=%s\n",
udi.c_str());
string sdic;
sdic.assign(dic, strlen(dic));
ConfSimple conf(sdic);
if (!cc.put(udi, &conf, data, 0)) {
cerr << "Put failed: " << cc.getReason() << endl;
cerr << "conf: ["; conf.write(cerr); cerr << "]" << endl;
exit(1);
}
}
cc.open(CirCache::CC_OPREAD);
} else if (op_flags & OPT_g) {
if (!cc.open(CirCache::CC_OPREAD)) {
cerr << "Open failed: " << cc.getReason() << endl;
exit(1);
}
while (argc) {
string udi = *argv++;argc--;
string dic, data;
if (!cc.get(udi, dic, data, instance)) {
cerr << "Get failed: " << cc.getReason() << endl;
exit(1);
}
cout << "Dict: [" << dic << "]" << endl;
if (op_flags & OPT_D)
cout << "Data: [" << data << "]" << endl;
}
} else if (op_flags & OPT_e) {
if (!cc.open(CirCache::CC_OPWRITE)) {
cerr << "Open failed: " << cc.getReason() << endl;
exit(1);
}
while (argc) {
string udi = *argv++;argc--;
string dic, data;
if (!cc.erase(udi)) {
cerr << "Erase failed: " << cc.getReason() << endl;
exit(1);
}
}
} else if (op_flags & OPT_d) {
if (!cc.open(CirCache::CC_OPREAD)) {
cerr << "Open failed: " << cc.getReason() << endl;
exit(1);
}
cc.dump();
} else
Usage();
exit(0);
}
#endif