1 /* -*- buffer-read-only: t -*- vi: set ro: */ 2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ 3 /* c-strncasecmp.c -- case insensitive string comparator in C locale 4 Copyright (C) 1998-1999, 2005-2006, 2009-2011 Free Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software Foundation, 18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ 19 20 #include <config.h> 21 22 /* Specification. */ 23 #include "c-strcase.h" 24 25 #include <limits.h> 26 27 #include "c-ctype.h" 28 29 int 30 c_strncasecmp (const char *s1, const char *s2, size_t n) 31 { 32 register const unsigned char *p1 = (const unsigned char *) s1; 33 register const unsigned char *p2 = (const unsigned char *) s2; 34 unsigned char c1, c2; 35 36 if (p1 == p2 || n == 0) 37 return 0; 38 39 do 40 { 41 c1 = c_tolower (*p1); 42 c2 = c_tolower (*p2); 43 44 if (--n == 0 || c1 == '\0') 45 break; 46 47 ++p1; 48 ++p2; 49 } 50 while (c1 == c2); 51 52 if (UCHAR_MAX <= INT_MAX) 53 return c1 - c2; 54 else 55 /* On machines where 'char' and 'int' are types of the same size, the 56 difference of two 'unsigned char' values - including the sign bit - 57 doesn't fit in an 'int'. */ 58 return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0); 59 } 60