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/* Unit test for ldconfig string tables.
Copyright (C) 2020-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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; 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, see <https://www.gnu.org/licenses/>. */
#include <array_length.h>
#include <stdlib.h>
#if __GNUC_PREREQ (5, 0)
#include <string.h>
#include <stringtable.h>
#include <support/check.h>
#include <support/support.h>
static int
do_test (void)
{
/* Empty string table. */
{
struct stringtable s = { 0, };
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
TEST_COMPARE_STRING (f.strings, "");
TEST_COMPARE (f.size, 0);
free (f.strings);
stringtable_free (&s);
}
/* String table with one empty string. */
{
struct stringtable s = { 0, };
struct stringtable_entry *e = stringtable_add (&s, "");
TEST_COMPARE_STRING (e->string, "");
TEST_COMPARE (e->length, 0);
TEST_COMPARE (s.count, 1);
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
TEST_COMPARE (e->offset, 0);
TEST_COMPARE_STRING (f.strings, "");
TEST_COMPARE (f.size, 1);
free (f.strings);
stringtable_free (&s);
}
/* String table with one non-empty string. */
{
struct stringtable s = { 0, };
struct stringtable_entry *e = stringtable_add (&s, "name");
TEST_COMPARE_STRING (e->string, "name");
TEST_COMPARE (e->length, 4);
TEST_COMPARE (s.count, 1);
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
TEST_COMPARE (e->offset, 0);
TEST_COMPARE_STRING (f.strings, "name");
TEST_COMPARE (f.size, 5);
free (f.strings);
stringtable_free (&s);
}
/* Two strings, one is a prefix of the other. Tail-merging can only
happen in one way in this case. */
{
struct stringtable s = { 0, };
struct stringtable_entry *suffix = stringtable_add (&s, "suffix");
TEST_COMPARE_STRING (suffix->string, "suffix");
TEST_COMPARE (suffix->length, 6);
TEST_COMPARE (s.count, 1);
struct stringtable_entry *prefix
= stringtable_add (&s, "prefix-suffix");
TEST_COMPARE_STRING (prefix->string, "prefix-suffix");
TEST_COMPARE (prefix->length, strlen ("prefix-suffix"));
TEST_COMPARE (s.count, 2);
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
TEST_COMPARE (prefix->offset, 0);
TEST_COMPARE (suffix->offset, strlen ("prefix-"));
TEST_COMPARE_STRING (f.strings, "prefix-suffix");
TEST_COMPARE (f.size, sizeof ("prefix-suffix"));
free (f.strings);
stringtable_free (&s);
}
/* String table with various shared prefixes. Triggers hash
resizing. */
{
enum { count = 1500 };
char *strings[2 * count];
struct stringtable_entry *entries[2 * count];
struct stringtable s = { 0, };
for (int i = 0; i < count; ++i)
{
strings[i] = xasprintf ("%d", i);
entries[i] = stringtable_add (&s, strings[i]);
TEST_COMPARE (entries[i]->length, strlen (strings[i]));
TEST_COMPARE_STRING (entries[i]->string, strings[i]);
strings[i + count] = xasprintf ("prefix/%d", i);
entries[i + count] = stringtable_add (&s, strings[i + count]);
TEST_COMPARE (entries[i + count]->length, strlen (strings[i + count]));
TEST_COMPARE_STRING (entries[i + count]->string, strings[i + count]);
}
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
for (int i = 0; i < 2 * count; ++i)
{
TEST_COMPARE (entries[i]->length, strlen (strings[i]));
TEST_COMPARE_STRING (entries[i]->string, strings[i]);
TEST_COMPARE_STRING (f.strings + entries[i]->offset, strings[i]);
free (strings[i]);
}
free (f.strings);
stringtable_free (&s);
}
/* Verify that maximum tail merging happens. */
{
struct stringtable s = { 0, };
const char *strings[] = {
"",
"a",
"b",
"aa",
"aaa",
"aa",
"bb",
"b",
"a",
"ba",
"baa",
};
struct stringtable_entry *entries[array_length (strings)];
for (int i = 0; i < array_length (strings); ++i)
entries[i] = stringtable_add (&s, strings[i]);
for (int i = 0; i < array_length (strings); ++i)
TEST_COMPARE_STRING (entries[i]->string, strings[i]);
struct stringtable_finalized f;
stringtable_finalize (&s, &f);
/* There are only four different strings, "aaa", "ba", "baa",
"bb". The rest is shared in an unspecified fashion. */
TEST_COMPARE (f.size, 4 + 3 + 4 + 3);
for (int i = 0; i < array_length (strings); ++i)
{
TEST_COMPARE_STRING (entries[i]->string, strings[i]);
TEST_COMPARE_STRING (f.strings + entries[i]->offset, strings[i]);
}
free (f.strings);
stringtable_free (&s);
}
return 0;
}
#include <support/test-driver.c>
/* Re-compile the string table implementation here. It is not
possible to link against the actual build because it was built for
use in ldconfig. */
#define _(arg) arg
#include "stringtable.c"
#include "stringtable_free.c"
#else
#include <support/test-driver.h>
int
main (void)
{
return EXIT_UNSUPPORTED;
}
#endif
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