| /* Test of fuzzy string comparison. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| 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; either version 3 of the License, or |
| (at your option) any later version. |
| |
| 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/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ |
| |
| #include <config.h> |
| |
| #include "fstrcmp.h" |
| |
| #include <stdbool.h> |
| |
| #include "macros.h" |
| |
| static bool |
| check_fstrcmp (const char *string1, const char *string2, double expected) |
| { |
| /* The use of 'volatile' guarantees that excess precision bits are dropped |
| before the addition and before the following comparison at the caller's |
| site. It is necessary on x86 systems where double-floats are not IEEE |
| compliant by default, to avoid that msgmerge results become platform and |
| compiler option dependent. 'volatile' is a portable alternative to gcc's |
| -ffloat-store option. */ |
| { |
| volatile double result = fstrcmp (string1, string2); |
| if (!(result == expected)) |
| return false; |
| } |
| { |
| volatile double result = fstrcmp_bounded (string1, string2, expected); |
| if (!(result == expected)) |
| return false; |
| } |
| { |
| double bound = expected * 0.5; /* implies bound <= expected */ |
| volatile double result = fstrcmp_bounded (string1, string2, bound); |
| if (!(result == expected)) |
| return false; |
| } |
| { |
| double bound = (1 + expected) * 0.5; |
| if (expected < bound) |
| { |
| volatile double result = fstrcmp_bounded (string1, string2, bound); |
| if (!(result < bound)) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| int |
| main (int argc, char *argv[]) |
| { |
| ASSERT (check_fstrcmp ("Langstrumpf", "Langstrumpf", 1.0)); |
| ASSERT (check_fstrcmp ("Levenshtein", "Levenstein", 20./21.)); |
| ASSERT (check_fstrcmp ("Levenstein", "Levenshtein", 20./21.)); |
| ASSERT (check_fstrcmp ("xy", "yx", 1./2.)); |
| ASSERT (check_fstrcmp ("George Bush", "Abraham Lincoln", 2./13.)); |
| ASSERT (check_fstrcmp ("George Bush", "George \"Bugs\" Moran", 2./3.)); |
| |
| return 0; |
| } |