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