Mercurial > forge
comparison main/strings/strncmp.m @ 0:6b33357c7561 octave-forge
Initial revision
| author | pkienzle |
|---|---|
| date | Wed, 10 Oct 2001 19:54:49 +0000 |
| parents | |
| children | 2ac2777b30bc |
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| -1:000000000000 | 0:6b33357c7561 |
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| 1 ## Copyright (C) 2000 Bill Lash | |
| 2 ## | |
| 3 ## This program is free software; you can redistribute it and/or modify | |
| 4 ## it under the terms of the GNU General Public License as published by | |
| 5 ## the Free Software Foundation; either version 2 of the License, or | |
| 6 ## (at your option) any later version. | |
| 7 ## | |
| 8 ## This program is distributed in the hope that it will be useful, | |
| 9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 ## GNU General Public License for more details. | |
| 12 ## | |
| 13 ## You should have received a copy of the GNU General Public License | |
| 14 ## along with this program; if not, write to the Free Software | |
| 15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 16 | |
| 17 ## usage: strncmp (s1, s2, n) | |
| 18 ## | |
| 19 ## Compare the first n characters of two strings, returning 1 if | |
| 20 ## they are the same, and 0 otherwise. | |
| 21 ## | |
| 22 ## Note: For compatibility with Matlab, Octave's strncmp function | |
| 23 ## returns 1 if the strings are equal, and 0 otherwise. This is | |
| 24 ## just the opposite of the corresponding C library function. | |
| 25 | |
| 26 ## Author: Bill Lash (lash@tellabs.com) | |
| 27 | |
| 28 function status = strncmp(s1, s2, n) | |
| 29 | |
| 30 if (nargin != 3) | |
| 31 usage ("strncmp (s, t, n)"); | |
| 32 endif | |
| 33 | |
| 34 status = 0; # Assume strings are different | |
| 35 if (isstr (s1) && isstr(s2)) | |
| 36 c1 = columns (s1); | |
| 37 c2 = columns (s2); | |
| 38 if (n < 1) | |
| 39 # Comparing less than 1 character of the string | |
| 40 status = 0; # will always say they are not equal (for Matlab | |
| 41 # compatibility | |
| 42 | |
| 43 elseif ((n <= c1) && (n <= c2)) | |
| 44 status = strcmp(s1(:,1:n),s2(:,1:n)); | |
| 45 else | |
| 46 status = 0; | |
| 47 endif | |
| 48 endif | |
| 49 | |
| 50 endfunction | |
| 51 |