diff options
Diffstat (limited to 'src/VBox/Runtime/common/string/RTStrICmpAscii.cpp')
-rw-r--r-- | src/VBox/Runtime/common/string/RTStrICmpAscii.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/RTStrICmpAscii.cpp b/src/VBox/Runtime/common/string/RTStrICmpAscii.cpp new file mode 100644 index 00000000..19ca6a26 --- /dev/null +++ b/src/VBox/Runtime/common/string/RTStrICmpAscii.cpp @@ -0,0 +1,88 @@ +/* $Id: RTStrICmpAscii.cpp $ */ +/** @file + * IPRT - RTStrICmpAscii. + */ + +/* + * Copyright (C) 2010-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * 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, in version 3 of the + * License. + * + * 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>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include <iprt/string.h> +#include "internal/iprt.h" + +#include <iprt/assert.h> +#include <iprt/ctype.h> + + +RTDECL(int) RTStrICmpAscii(const char *psz1, const char *psz2) +{ + if (psz1 == psz2) + return 0; + if (!psz1) + return -1; + if (!psz2) + return 1; + + for (;;) + { + RTUNICP uc1; + int rc = RTStrGetCpEx(&psz1, &uc1); + if (RT_SUCCESS(rc)) + { + unsigned char uch2 = *psz2++; Assert(uch2 < 0x80); + + /* compare */ + int iDiff = uc1 - uch2; + if (iDiff) + { + if (uc1 >= 0x80) + return 1; + + iDiff = RT_C_TO_LOWER(uc1) - RT_C_TO_LOWER(uch2); /* Return lower cased diff! */ + if (iDiff) + return iDiff; + } + + if (uch2) + { /* likely */ } + else + return 0; + } + /* Hit some bad encoding, continue in case sensitive mode. */ + else + return RTStrCmp(psz1 - 1, psz2); + } +} +RT_EXPORT_SYMBOL(RTStrICmpAscii); + |