1 files changed, 136 insertions, 0 deletions
diff --git a/src/libs/libbib/search.cpp b/src/libs/libbib/search.cpp
new file mode 100644
index 0000000..10867b6
--- /dev/null
+++ b/src/libs/libbib/search.cpp
@@ -0,0 +1,136 @@
+/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+     Written by James Clark (jjc@jclark.com)
+
+This file is part of groff.
+
+groff 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 3 of the License, or
+(at your option) any later version.
+
+groff 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, see <http://www.gnu.org/licenses/>. */
+
+#include "lib.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "posix.h"
+#include "errarg.h"
+#include "error.h"
+#include "nonposix.h"
+
+#include "refid.h"
+#include "search.h"
+
+int linear_truncate_len = 6;
+const char *linear_ignore_fields = "XYZ";
+
+search_list::search_list()
+: list(0), niterators(0), next_fid(1)
+{
+}
+
+search_list::~search_list()
+{
+  assert(niterators == 0);
+  while (list) {
+    search_item *tem = list->next;
+    delete list;
+    list = tem;
+  }
+}
+
+void search_list::add_file(const char *filename, int silent)
+{
+  search_item *p = make_index_search_item(filename, next_fid);
+  if (!p) {
+    int fd = open(filename, O_RDONLY | O_BINARY);
+    if (fd < 0) {
+      if (!silent)
+        error("can't open '%1': %2", filename, strerror(errno));
+    }
+    else
+      p = make_linear_search_item(fd, filename, next_fid);
+  }
+  if (p) {
+    search_item **pp;
+    for (pp = &list; *pp; pp = &(*pp)->next)
+      ;
+    *pp = p;
+    next_fid = p->next_filename_id();
+  }
+}
+
+int search_list::nfiles() const
+{
+  int n = 0;
+  for (search_item *ptr = list; ptr; ptr = ptr->next)
+    n++;
+  return n;
+}
+
+search_list_iterator::search_list_iterator(search_list *p, const char *q)
+: list(p), ptr(p->list), iter(0), query(strsave(q)),
+  searcher(q, strlen(q), linear_ignore_fields, linear_truncate_len)
+{
+  list->niterators += 1;
+}
+
+search_list_iterator::~search_list_iterator()
+{
+  list->niterators -= 1;
+  delete[] query;
+  delete iter;
+}
+
+int search_list_iterator::next(const char **pp, int *lenp, reference_id *ridp)
+{
+  while (ptr) {
+    if (iter == 0)
+      iter = ptr->make_search_item_iterator(query);
+    if (iter->next(searcher, pp, lenp, ridp))
+      return 1;
+    delete iter;
+    iter = 0;
+    ptr = ptr->next;
+  }
+  return 0;
+}
+
+search_item::search_item(const char *nm, int fid)
+: name(strsave(nm)), filename_id(fid), next(0)
+{
+}
+
+search_item::~search_item()
+{
+  delete[] name;
+}
+
+int search_item::is_named(const char *nm) const
+{
+  return strcmp(name, nm) == 0;
+}
+
+int search_item::next_filename_id() const
+{
+  return filename_id + 1;
+}
+
+search_item_iterator::~search_item_iterator()
+{
+}
+
+// Local Variables:
+// fill-column: 72
+// mode: C++
+// End:
+// vim: set cindent noexpandtab shiftwidth=2 textwidth=72: