| | 1 | /* strcasecmp.c -- case insensitive string comparator |
| | 2 | Copyright (C) 1998, 1999 Free Software Foundation, Inc. |
| | 3 | |
| | 4 | This program is free software; you can redistribute it and/or modify |
| | 5 | it under the terms of the GNU General Public License as published by |
| | 6 | the Free Software Foundation; either version 2, or (at your option) |
| | 7 | any later version. |
| | 8 | |
| | 9 | This program is distributed in the hope that it will be useful, |
| | 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 12 | GNU General Public License for more details. |
| | 13 | |
| | 14 | You should have received a copy of the GNU General Public License |
| | 15 | along with this program; if not, write to the Free Software Foundation, |
| | 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| | 17 | |
| | 18 | #if HAVE_CONFIG_H |
| | 19 | # include <config.h> |
| | 20 | #endif |
| | 21 | |
| | 22 | #ifdef LENGTH_LIMIT |
| | 23 | # define STRXCASECMP_FUNCTION strncasecmp |
| | 24 | # define STRXCASECMP_DECLARE_N , size_t n |
| | 25 | # define LENGTH_LIMIT_EXPR(Expr) Expr |
| | 26 | #else |
| | 27 | # define STRXCASECMP_FUNCTION strcasecmp |
| | 28 | # define STRXCASECMP_DECLARE_N /* empty */ |
| | 29 | # define LENGTH_LIMIT_EXPR(Expr) 0 |
| | 30 | #endif |
| | 31 | |
| | 32 | #include <sys/types.h> |
| | 33 | #include <ctype.h> |
| | 34 | |
| | 35 | #define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) |
| | 36 | |
| | 37 | /* Compare {{no more than N characters of }}strings S1 and S2, |
| | 38 | ignoring case, returning less than, equal to or |
| | 39 | greater than zero if S1 is lexicographically less |
| | 40 | than, equal to or greater than S2. */ |
| | 41 | |
| | 42 | int |
| | 43 | STRXCASECMP_FUNCTION (const char *s1, const char *s2 STRXCASECMP_DECLARE_N) |
| | 44 | { |
| | 45 | register const unsigned char *p1 = (const unsigned char *) s1; |
| | 46 | register const unsigned char *p2 = (const unsigned char *) s2; |
| | 47 | unsigned char c1, c2; |
| | 48 | |
| | 49 | if (p1 == p2 || LENGTH_LIMIT_EXPR (n == 0)) |
| | 50 | return 0; |
| | 51 | |
| | 52 | do |
| | 53 | { |
| | 54 | c1 = TOLOWER (*p1); |
| | 55 | c2 = TOLOWER (*p2); |
| | 56 | |
| | 57 | if (LENGTH_LIMIT_EXPR (--n == 0) || c1 == '\0') |
| | 58 | break; |
| | 59 | |
| | 60 | ++p1; |
| | 61 | ++p2; |
| | 62 | } |
| | 63 | while (c1 == c2); |
| | 64 | |
| | 65 | return c1 - c2; |
| | 66 | } |
projects / bison.git / blame_incremental