1 /* Compare two wide strings. 2 Copyright (C) 1999, 2011-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 1999. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 3 of the 8 License, or (at your option) any later version. 9 10 This file is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 int 19 wcscmp (const wchar_t *s1, const wchar_t *s2) /* */ 20 { 21 for (;;) 22 { 23 wchar_t wc1 = *s1++; 24 wchar_t wc2 = *s2++; 25 if (wc1 != (wchar_t)'\0' && wc1 == wc2) 26 continue; 27 /* Note that wc1 and wc2 each have at most 31 bits. */ 28 return (int)wc1 - (int)wc2; 29 /* > 0 if wc1 > wc2, < 0 if wc1 < wc2, 30 = 0 if wc1 and wc2 are both '\0'. */ 31 } 32 }