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comparison scripts/strings/strtok.m @ 11587:c792872f8942

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all script files: untabify and strip trailing whitespace
author John W. Eaton <jwe@octave.org>
date Thu, 20 Jan 2011 17:35:29 -0500
parents fd0a3ac60b0e
children fa94d6a93d45
comparison
equal deleted inserted replaced
11586:12df7854fa7c 11587:c792872f8942
16 ## along with Octave; see the file COPYING. If not, see 16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>. 17 ## <http://www.gnu.org/licenses/>.
18 18
19 ## -*- texinfo -*- 19 ## -*- texinfo -*-
20 ## @deftypefn {Function File} {[@var{tok}, @var{rem}] =} strtok (@var{str}, @var{delim}) 20 ## @deftypefn {Function File} {[@var{tok}, @var{rem}] =} strtok (@var{str}, @var{delim})
21 ## 21 ##
22 ## Find all characters up to but not including the first character which 22 ## Find all characters up to but not including the first character which
23 ## is in the string delim. If @var{rem} is requested, it contains the 23 ## is in the string delim. If @var{rem} is requested, it contains the
24 ## remainder of the string, starting at the first delimiter. Leading 24 ## remainder of the string, starting at the first delimiter. Leading
25 ## delimiters are ignored. If @var{delim} is not specified, space is 25 ## delimiters are ignored. If @var{delim} is not specified, space is
26 ## assumed. For example: 26 ## assumed. For example:
27 ## 27 ##
28 ## @example 28 ## @example
29 ## @group 29 ## @group
30 ## strtok ("this is the life") 30 ## strtok ("this is the life")
31 ## @result{} "this" 31 ## @result{} "this"
46 if (nargin<1 || nargin > 2) 46 if (nargin<1 || nargin > 2)
47 print_usage (); 47 print_usage ();
48 endif 48 endif
49 49
50 if (nargin < 2 || isempty (delim)) 50 if (nargin < 2 || isempty (delim))
51 delim = "\t\n\v\f\r "; 51 delim = "\t\n\v\f\r ";
52 endif 52 endif
53 53
54 if (isempty (str)) 54 if (isempty (str))
55 tok = rem = ""; 55 tok = rem = "";
56 elseif (length (delim) > 3) 56 elseif (length (delim) > 3)
57 start = 1; 57 start = 1;
58 len = length (str); 58 len = length (str);
59 while (start <= len) 59 while (start <= len)
60 if (all (str(start) != delim)) 60 if (all (str(start) != delim))
61 break; 61 break;
62 endif 62 endif
63 start++; 63 start++;
64 endwhile 64 endwhile
65 stop = start; 65 stop = start;
66 while (stop <= len) 66 while (stop <= len)
67 if (any (str(stop) == delim)) 67 if (any (str(stop) == delim))
68 break; 68 break;
69 endif 69 endif
70 stop++; 70 stop++;
71 endwhile 71 endwhile
72 tok = str(start:stop-1); 72 tok = str(start:stop-1);
73 rem = str(stop:len); 73 rem = str(stop:len);
110 %! printf("<%s>", s(1)); 110 %! printf("<%s>", s(1));
111 %! endwhile 111 %! endwhile
112 %! printf("\n"); 112 %! printf("\n");
113 %! % ---------------------------------------------------- 113 %! % ----------------------------------------------------
114 %! % Demonstrates processing of an entire string split on 114 %! % Demonstrates processing of an entire string split on
115 %! % a variety of delimiters. Tokens and delimiters are 115 %! % a variety of delimiters. Tokens and delimiters are
116 %! % printed one after another in angle brackets. The 116 %! % printed one after another in angle brackets. The
117 %! % string is: 117 %! % string is:
118 118
119 %!# test the tokens for all cases 119 %!# test the tokens for all cases
120 %!assert(strtok(""), ""); # no string 120 %!assert(strtok(""), ""); # no string
136 136
137 %!# simple check with 2 and 3 delimeters 137 %!# simple check with 2 and 3 delimeters
138 %!assert(strtok("this is", "i "), "th"); 138 %!assert(strtok("this is", "i "), "th");
139 %!assert(strtok("this is", "ij "), "th"); 139 %!assert(strtok("this is", "ij "), "th");
140 140
141 %!# test all cases for 4 delimiters since a different 141 %!# test all cases for 4 delimiters since a different
142 %!# algorithm is used when more than 3 delimiters 142 %!# algorithm is used when more than 3 delimiters
143 %!assert(strtok("","jkl "), ""); 143 %!assert(strtok("","jkl "), "");
144 %!assert(strtok("this","jkl "), "this"); 144 %!assert(strtok("this","jkl "), "this");
145 %!assert(strtok("this ","jkl "), "this"); 145 %!assert(strtok("this ","jkl "), "this");
146 %!assert(strtok("this is","jkl "), "this"); 146 %!assert(strtok("this is","jkl "), "this");