1/* mbscmp - multibyte string comparison. */ 2 3/* Copyright (C) 1995 Free Software Foundation, Inc. 4 5 This file is part of GNU Bash, the Bourne Again SHell. 6 7 Bash is free software: you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation, either version 3 of the License, or 10 (at your option) any later version. 11 12 Bash is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with Bash. If not, see <http://www.gnu.org/licenses/>. 19*/ 20 21#include <config.h> 22 23#if !defined (HAVE_MBSCMP) && defined (HANDLE_MULTIBYTE) 24 25#include <stdlib.h> 26#include <stddef.h> 27 28/* Compare MBS1 and MBS2. */ 29int 30mbscmp (mbs1, mbs2) 31 const char *mbs1; 32 const char *mbs2; 33{ 34 int len1, len2; 35 wchar_t c1, c2; 36 37 len1 = len2 = 0; 38 /* Reset multibyte characters to their initial state. */ 39 (void) mblen ((char *) NULL, 0); 40 41 do 42 { 43 len1 = mbtowc ((wchar_t *) &c1, mbs1, MB_CUR_MAX); 44 len2 = mbtowc ((wchar_t *) &c2, mbs2, MB_CUR_MAX); 45 46 if (len1 == 0) 47 return len2 == 0 ? 0 : -1; 48 if (len2 == 0) 49 return 1; 50 if (len1 < 0 || len2 < 0) 51 /* FIXME: an illegal character appears. What to do? */ 52 return c1 - c2; 53 54 mbs1 += len1; 55 mbs2 += len2; 56 } 57 while (c1 == c2); 58 59 return c1 - c2; 60} 61 62#endif 63