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xapian-dump: Rewrite to generate C code as output.

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This was for some time testing, (to see how fast xapian could be
if we were strictly adding documents and not doing any other IO
or computation). The answer is that xapian is quite fast, (on
the order of 1000 documents per second).
This commit is contained in:
Carl Worth 2009-10-18 20:49:43 -07:00
parent 36640b303e
commit 512f7bb0f6
1 changed files with 69 additions and 15 deletions
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84
xapian-dump.cc
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@ -39,15 +39,44 @@ using namespace std;
vector<int> UNSERIALIZE;
unsigned int MAX_TERMS = 0;
static void
print_escaped_string (const char *s)
{
printf ("\"");
while (*s) {
if (*s == '"')
printf ("\\");
printf ("%c", *s);
s++;
}
printf ("\"");
}
static void
print_document_terms (Xapian::Document doc)
{
Xapian::TermIterator i;
Xapian::TermIterator it;
unsigned int i;
printf (" Terms:\n");
printf (" {\n");
for (i = doc.termlist_begin (); i != doc.termlist_end (); i++)
cout << "\t" << *i << endl;
for (it = doc.termlist_begin (), i = 0;
it != doc.termlist_end ();
it++, i++)
{
printf (" ");
print_escaped_string ((*it).c_str());
printf (",\n");
}
for ( ; i < MAX_TERMS; i++)
printf (" \"\",\n");
printf (" },\n");
}
static int
@ -67,26 +96,25 @@ print_document_values (Xapian::Document doc)
int value_no, value_int;
double value_float;
printf (" Values:\n");
for (i = doc.values_begin (); i != doc.values_end (); i++) {
value_no = i.get_valueno();
cout << "\t" << i.get_valueno() << ": ";
printf (" ");
if (vector_int_contains (UNSERIALIZE, value_no)) {
value_float = Xapian::sortable_unserialise (*i);
value_int = value_float;
if (value_int == value_float)
cout << value_int;
printf ("%d", value_int);
else
cout << value_float;
printf ("\"%f\"", value_float);
} else {
cout << *i;
print_escaped_string ((*i).c_str ());
}
cout << endl;
printf (",\n");
}
}
static void
@ -94,16 +122,17 @@ print_document (Xapian::Database db, Xapian::docid id)
{
Xapian::Document doc;
printf ("Document %u:\n", id);
printf ("{\n");
doc = db.get_document (id);
printf (" Data:\n");
cout << "\t" << doc.get_data () << endl;
printf (" \"%s\",\n", doc.get_data ().c_str());
print_document_terms (doc);
print_document_values (doc);
printf ("},\n");
}
int
@ -129,18 +158,43 @@ main (int argc, char *argv[])
UNSERIALIZE.push_back (atoi (argv[i]));
try {
Xapian::Database db;
Xapian::PostingIterator i;
Xapian::docid doc_id;
db = Xapian::Database (database_path);
for (i = db.postlist_begin (""); i != db.postlist_end (""); i++) {
Xapian::Document doc;
doc_id = *i;
doc = db.get_document (doc_id);
if (doc.termlist_count () > MAX_TERMS)
MAX_TERMS = doc.termlist_count ();
}
printf ("#define MAX_TERMS %d\n\n", MAX_TERMS);
printf ("typedef struct {\n"
" char data[255];\n"
" char terms[MAX_TERMS][255];\n"
" char message_id[255];\n"
" char thread_id[4096];\n"
" time_t time;\n"
"} document_dump_t;\n\n");
printf ("document_dump_t dump[] = {\n");
for (i = db.postlist_begin (""); i != db.postlist_end (""); i++) {
doc_id = *i;
print_document (db, doc_id);
}
printf ("};\n");
} catch (const Xapian::Error &error) {
cerr << "A Xapian exception occurred: " << error.get_msg () << endl;
exit (1);