static void findBlockFiles() {
gChainSize = 0;
auto blockChainDir = getBlockchainDir();
auto blockDir = blockChainDir + std::string("/blocks");
info("loading block chain from directory: %s", blockChainDir.c_str());
struct stat statBuf;
auto r = stat(blockDir.c_str(), &statBuf);
auto oldStyle = (r<0 || !S_ISDIR(statBuf.st_mode));
int blkDatId = (oldStyle ? 1 : 0);
auto fmt = oldStyle ? "/blk%04d.dat" : "/blocks/blk%05d.dat";
while(1) {
char buf[64];
sprintf(buf, fmt, blkDatId++);
auto fileName = blockChainDir + std::string(buf) ;
auto fd = open(fileName.c_str(), O_RDONLY);
if(fd<0) {
if(1<blkDatId) {
break;
}
sysErrFatal(
"failed to open block chain file %s",
fileName.c_str()
);
}
struct stat statBuf;
auto r0 = fstat(fd, &statBuf);
if(r0<0) {
sysErrFatal(
"failed to fstat block chain file %s",
fileName.c_str()
);
}
auto fileSize = statBuf.st_size;
#if !defined(_WIN64)
auto r1 = posix_fadvise(fd, 0, fileSize, POSIX_FADV_NOREUSE);
if(r1<0) {
warning(
"failed to posix_fadvise on block chain file %s",
fileName.c_str()
);
}
#endif
BlockFile blockFile;
blockFile.fd = fd;
blockFile.size = fileSize;
blockFile.name = fileName;
blockFiles.push_back(blockFile);
gChainSize += fileSize;
}
info("block chain size = %.3f Gigs", 1e-9*gChainSize);
}
static void makeBlockMaps() {
auto blockChainDir = getBlockchainDir();
auto blockDir = blockChainDir + std::string("/blocks");
info("loading block chain from: %s", blockChainDir.c_str());
struct stat statBuf;
auto r = stat(blockDir.c_str(), &statBuf);
auto oldStyle = (r<0 || !S_ISDIR(statBuf.st_mode));
int blkDatId = (oldStyle ? 1 : 0);
auto fmt = oldStyle ? "/blk%04d.dat" : "/blocks/blk%05d.dat";
while(1) {
char buf[64];
sprintf(buf, fmt, blkDatId++);
auto blockMapFileName =
blockChainDir +
std::string(buf)
;
auto blockMapFD = open(blockMapFileName.c_str(), O_RDONLY);
if(blockMapFD<0) {
if(1<blkDatId) {
break;
}
sysErrFatal(
"failed to open block chain file %s",
blockMapFileName.c_str()
);
}
struct stat statBuf;
int st0 = fstat(blockMapFD, &statBuf);
if(st0<0) {
sysErrFatal(
"failed to fstat block chain file %s",
blockMapFileName.c_str()
);
}
auto mapSize = statBuf.st_size;
auto st1 = posix_fadvise(blockMapFD, 0, mapSize, POSIX_FADV_NOREUSE);
if(st1<0) {
warning(
"failed to posix_fadvise on block chain file %s",
blockMapFileName.c_str()
);
}
Map map;
map.size = mapSize;
map.fd = blockMapFD;
map.name = blockMapFileName;
mapVec.push_back(map);
}
}
