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string_appendf is like string_printf, but instead of allocating a new string, it appends to an existing string. This allows reusing a std::string's memory buffer across several calls, for example. gdb/ChangeLog: 2017-10-30 Pedro Alves <palves@redhat.com> * common/common-utils.c (string_appendf, string_vappendf): New functions. * common/common-utils.h (string_appendf, string_vappendf): New declarations. * unittests/common-utils-selftests.c (string_appendf_func) (test_appendf_func, string_vappendf_wrapper, string_appendf_tests) (string_vappendf_tests): New functions. (_initialize_common_utils_selftests): Register "string_appendf" and "string_vappendf tests".
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/* Self tests for general utility routines for GDB, the GNU debugger.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "selftest.h"
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namespace selftests {
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/* Type of both 'string_printf' and the 'format' function below. Used
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to run the same tests against both string_printf and
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string_vprintf. */
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typedef std::string (format_func) (const char *fmt, ...)
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ATTRIBUTE_PRINTF (1, 2);
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static void
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test_format_func (format_func *func)
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{
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/* Basic smoke tests. */
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SELF_CHECK (func ("%s", "") == "");
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SELF_CHECK (func ("%s", "test") == "test");
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SELF_CHECK (func ("%d", 23) == "23");
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SELF_CHECK (func ("%s %d %s", "test", 23, "done") == "test 23 done");
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SELF_CHECK (func ("nothing") == "nothing");
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SELF_CHECK (func ("%d comes before 2", 1) == "1 comes before 2");
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SELF_CHECK (func ("hello %s", "world") == "hello world");
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/* Check that we don't mishandle very large strings. (An earlier
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non-public implementation of string_printf mishandled this). */
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#define X10 "0123456789"
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#define X100 X10 X10 X10 X10 X10 X10 X10 X10 X10 X10
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#define X1000 X100 X100 X100 X100 X100 X100 X100 X100 X100 X100
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#define X10000 X1000 X1000 X1000 X1000 X1000 X1000 X1000 X1000 X1000 X1000
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#define X100000 X10000 X10000 X10000 X10000 X10000 X10000 X10000 X10000 X10000 X10000
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SELF_CHECK (func ("%s", X10) == X10);
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SELF_CHECK (func ("%s", X100) == X100);
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SELF_CHECK (func ("%s", X1000) == X1000);
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SELF_CHECK (func ("%s", X10000) == X10000);
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SELF_CHECK (func ("%s", X100000) == X100000);
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}
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static void
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string_printf_tests ()
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{
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test_format_func (string_printf);
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}
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static std::string ATTRIBUTE_PRINTF (1, 2)
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format (const char *fmt, ...)
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{
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va_list vp;
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va_start (vp, fmt);
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std::string result = string_vprintf (fmt, vp);
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va_end (vp);
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return result;
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}
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static void
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string_vprintf_tests ()
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{
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test_format_func (format);
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}
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/* Type of both 'string_appendf' and the 'string_vappendf_wrapper'
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function below. Used to run the same tests against both
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string_appendf and string_vappendf. */
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typedef void (string_appendf_func) (std::string &str, const char *fmt, ...)
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ATTRIBUTE_PRINTF (2, 3);
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static void
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test_appendf_func (string_appendf_func *func)
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{
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std::string str;
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func (str, "%s", "");
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SELF_CHECK (str == "");
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func (str, "%s", "test");
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SELF_CHECK (str == "test");
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func (str, "%d", 23);
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SELF_CHECK (str == "test23");
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func (str, "%s %d %s", "foo", 45, "bar");
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SELF_CHECK (str == "test23foo 45 bar");
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}
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static void ATTRIBUTE_PRINTF (2, 3)
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string_vappendf_wrapper (std::string &str, const char *fmt, ...)
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{
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va_list vp;
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va_start (vp, fmt);
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string_vappendf (str, fmt, vp);
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va_end (vp);
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}
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static void
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string_appendf_tests ()
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{
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test_appendf_func (string_appendf);
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}
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static void
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string_vappendf_tests ()
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{
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test_appendf_func (string_vappendf_wrapper);
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}
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} /* namespace selftests */
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void
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_initialize_common_utils_selftests ()
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{
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selftests::register_test ("string_printf", selftests::string_printf_tests);
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selftests::register_test ("string_vprintf", selftests::string_vprintf_tests);
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selftests::register_test ("string_appendf", selftests::string_appendf_tests);
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selftests::register_test ("string_vappendf",
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selftests::string_vappendf_tests);
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}
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