#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
+#include <unistd.h>
#include <zdict.h>
#include <zstd.h>
encoded.append(reinterpret_cast<char *>(buf), end - buf);
}
-void DictionaryBuilder::add_file(string filename)
+void DictionaryBuilder::add_file(string filename, dir_time)
{
if (keep_current_block) { // Only bother saving the filenames if we're actually keeping the block.
if (!current_block.empty()) {
return buf;
}
-Corpus::Corpus(FILE *outfp, size_t block_size, ZSTD_CDict *cdict)
- : invindex(new PostingListBuilder *[NUM_TRIGRAMS]), outfp(outfp), block_size(block_size), cdict(cdict)
+Corpus::Corpus(FILE *outfp, size_t block_size, ZSTD_CDict *cdict, bool store_dir_times)
+ : invindex(new PostingListBuilder *[NUM_TRIGRAMS]), outfp(outfp), block_size(block_size), store_dir_times(store_dir_times), cdict(cdict)
{
fill(invindex.get(), invindex.get() + NUM_TRIGRAMS, nullptr);
+ if (store_dir_times) {
+ dir_time_ctx = ZSTD_createCStream();
+ ZSTD_initCStream(dir_time_ctx, /*level=*/6);
+ }
}
Corpus::~Corpus()
return *invindex[trgm];
}
-void Corpus::add_file(string filename)
+void Corpus::add_file(string filename, dir_time dt)
{
++num_files;
if (!current_block.empty()) {
if (++num_files_in_block == block_size) {
flush_block();
}
+
+ if (store_dir_times) {
+ if (dt.sec == -1) {
+ // Not a directory.
+ dir_times.push_back('\0');
+ } else {
+ dir_times.push_back('\1');
+ dir_times.append(reinterpret_cast<char *>(&dt.sec), sizeof(dt.sec));
+ dir_times.append(reinterpret_cast<char *>(&dt.nsec), sizeof(dt.nsec));
+ }
+ compress_dir_times(/*allowed_slop=*/4096);
+ }
+}
+
+void Corpus::compress_dir_times(size_t allowed_slop)
+{
+ while (dir_times.size() >= allowed_slop) {
+ size_t old_size = dir_times_compressed.size();
+ dir_times_compressed.resize(old_size + 4096);
+
+ ZSTD_outBuffer outbuf;
+ outbuf.dst = dir_times_compressed.data() + old_size;
+ outbuf.size = 4096;
+ outbuf.pos = 0;
+
+ ZSTD_inBuffer inbuf;
+ inbuf.src = dir_times.data();
+ inbuf.size = dir_times.size();
+ inbuf.pos = 0;
+
+ int ret = ZSTD_compressStream(dir_time_ctx, &outbuf, &inbuf);
+ if (ret < 0) {
+ fprintf(stderr, "ZSTD_compressStream() failed\n");
+ exit(1);
+ }
+
+ dir_times_compressed.resize(old_size + outbuf.pos);
+ dir_times.erase(dir_times.begin(), dir_times.begin() + inbuf.pos);
+
+ if (outbuf.pos == 0 && inbuf.pos == 0) {
+ // Nothing happened (not enough data?), try again later.
+ return;
+ }
+ }
}
void Corpus::flush_block()
void Corpus::finish()
{
flush_block();
- string tempbuf;
- string compressed = zstd_compress(directory_data, nullptr, &tempbuf);
- fprintf(stderr, "dirdata: %zu bytes (compressed: %zu)\n", directory_data.size(), compressed.size());
}
size_t Corpus::num_trigrams() const
return num;
}
+string Corpus::get_compressed_dir_times()
+{
+ if (!store_dir_times) {
+ return "";
+ }
+ compress_dir_times(/*allowed_slop=*/0);
+ assert(dir_times.empty());
+
+ for (;;) {
+ size_t old_size = dir_times_compressed.size();
+ dir_times_compressed.resize(old_size + 4096);
+
+ ZSTD_outBuffer outbuf;
+ outbuf.dst = dir_times_compressed.data() + old_size;
+ outbuf.size = 4096;
+ outbuf.pos = 0;
+
+ int ret = ZSTD_endStream(dir_time_ctx, &outbuf);
+ if (ret < 0) {
+ fprintf(stderr, "ZSTD_compressStream() failed\n");
+ exit(1);
+ }
+
+ dir_times_compressed.resize(old_size + outbuf.pos);
+
+ if (ret == 0) {
+ // All done.
+ break;
+ }
+ }
+
+ return dir_times_compressed;
+}
+
string zstd_compress(const string &src, ZSTD_CDict *cdict, string *tempbuf)
{
static ZSTD_CCtx *ctx = nullptr;
return ht;
}
-DatabaseBuilder::DatabaseBuilder(const char *outfile, int block_size, string dictionary)
- : block_size(block_size)
+DatabaseBuilder::DatabaseBuilder(const char *outfile, gid_t owner, int block_size, string dictionary)
+ : outfile(outfile), block_size(block_size)
{
umask(0027);
- outfp = fopen(outfile, "wb");
+
+ string path = outfile;
+ path.resize(path.find_last_of('/') + 1);
+ if (path.empty()) {
+ path = ".";
+ }
+ int fd = open(path.c_str(), O_WRONLY | O_TMPFILE, 0640);
+ if (fd == -1) {
+ perror(path.c_str());
+ exit(1);
+ }
+
+ if (owner != (gid_t)-1) {
+ if (fchown(fd, (uid_t)-1, owner) == -1) {
+ perror("fchown");
+ exit(1);
+ }
+ }
+
+ outfp = fdopen(fd, "wb");
if (outfp == nullptr) {
perror(outfile);
exit(1);
hdr.extra_ht_slots = num_overflow_slots;
hdr.num_docids = 0;
hdr.hash_table_offset_bytes = -1; // We don't know these offsets yet.
- hdr.max_version = 1;
+ hdr.max_version = 2;
hdr.filename_index_offset_bytes = -1;
hdr.zstd_dictionary_length_bytes = -1;
fwrite(&hdr, sizeof(hdr), 1, outfp);
hdr.zstd_dictionary_length_bytes = dictionary.size();
cdict = ZSTD_createCDict(dictionary.data(), dictionary.size(), /*level=*/6);
}
+
+ hdr.directory_data_length_bytes = 0;
+ hdr.directory_data_offset_bytes = 0;
+ hdr.next_zstd_dictionary_length_bytes = 0;
+ hdr.next_zstd_dictionary_offset_bytes = 0;
+ hdr.conf_block_length_bytes = 0;
+ hdr.conf_block_offset_bytes = 0;
}
-Corpus *DatabaseBuilder::start_corpus()
+Corpus *DatabaseBuilder::start_corpus(bool store_dir_times)
{
corpus_start = steady_clock::now();
- corpus = new Corpus(outfp, block_size, cdict);
+ corpus = new Corpus(outfp, block_size, cdict, store_dir_times);
return corpus;
}
+void DatabaseBuilder::set_next_dictionary(std::string next_dictionary)
+{
+ this->next_dictionary = move(next_dictionary);
+}
+
+void DatabaseBuilder::set_conf_block(std::string conf_block)
+{
+ this->conf_block = move(conf_block);
+}
+
void DatabaseBuilder::finish_corpus()
{
corpus->finish();
fwrite(encoded.data(), encoded.size(), 1, outfp);
}
+ // Finally, write the directory times (for updatedb).
+ string compressed_dir_times = corpus->get_compressed_dir_times();
+ size_t bytes_for_compressed_dir_times = 0;
+ if (!compressed_dir_times.empty()) {
+ hdr.directory_data_offset_bytes = ftell(outfp);
+ hdr.directory_data_length_bytes = compressed_dir_times.size();
+ fwrite(compressed_dir_times.data(), compressed_dir_times.size(), 1, outfp);
+ bytes_for_compressed_dir_times = compressed_dir_times.size();
+ compressed_dir_times.clear();
+ }
+
+ // Write the recommended dictionary for next update.
+ if (!next_dictionary.empty()) {
+ hdr.next_zstd_dictionary_offset_bytes = ftell(outfp);
+ hdr.next_zstd_dictionary_length_bytes = next_dictionary.size();
+ fwrite(next_dictionary.data(), next_dictionary.size(), 1, outfp);
+ }
+
+ // And the configuration block.
+ if (!conf_block.empty()) {
+ hdr.conf_block_offset_bytes = ftell(outfp);
+ hdr.conf_block_length_bytes = conf_block.size();
+ fwrite(conf_block.data(), conf_block.size(), 1, outfp);
+ }
+
// Rewind, and write the updated header.
hdr.version = 1;
fseek(outfp, 0, SEEK_SET);
fwrite(&hdr, sizeof(hdr), 1, outfp);
+
+ // Give the file a proper name, making it visible in the file system.
+ // TODO: It would be nice to be able to do this atomically, like with rename.
+ unlink(outfile.c_str());
+ char procpath[256];
+ snprintf(procpath, sizeof(procpath), "/proc/self/fd/%d", fileno(outfp));
+ if (linkat(AT_FDCWD, procpath, AT_FDCWD, outfile.c_str(), AT_SYMLINK_FOLLOW) == -1) {
+ perror("linkat");
+ exit(1);
+ }
+
fclose(outfp);
- size_t total_bytes = (bytes_for_hashtable + bytes_for_posting_lists + bytes_for_filename_index + bytes_for_filenames);
+ size_t total_bytes = (bytes_for_hashtable + bytes_for_posting_lists + bytes_for_filename_index + bytes_for_filenames + bytes_for_compressed_dir_times);
dprintf("Block size: %7d files\n", block_size);
dprintf("Dictionary: %'7.1f MB\n", hdr.zstd_dictionary_length_bytes / 1048576.0);
dprintf("Posting lists: %'7.1f MB\n", bytes_for_posting_lists / 1048576.0);
dprintf("Filename index: %'7.1f MB\n", bytes_for_filename_index / 1048576.0);
dprintf("Filenames: %'7.1f MB\n", bytes_for_filenames / 1048576.0);
+ if (bytes_for_compressed_dir_times != 0) {
+ dprintf("Modify times: %'7.1f MB\n", bytes_for_compressed_dir_times / 1048576.0);
+ }
dprintf("Total: %'7.1f MB\n", total_bytes / 1048576.0);
dprintf("\n");
}
projects / plocate / blobdiff