Commit | Line | Data |
0308c4d5 |
1 | #!/usr/local/bin/perl -ws |
2 | |
3 | use strict ; |
4 | use Test::More ; |
5 | use Fcntl qw( :seek ) ; |
6 | use File::ReadBackwards ; |
7 | use Carp ; |
8 | |
9 | use vars qw( $opt_v ) ; |
10 | |
11 | my $file = 'bw.data' ; |
12 | |
13 | my $is_crlf = ( $^O =~ /win32/i || $^O =~ /vms/i ) ; |
14 | |
15 | print "nl\n" ; |
16 | my @nl_data = init_data( "\n" ) ; |
17 | plan( tests => 10 * @nl_data + 1 ) ; |
18 | test_read_backwards( \@nl_data ) ; |
19 | |
20 | print "crlf\n" ; |
21 | my @crlf_data = init_data( "\015\012" ) ; |
22 | test_read_backwards( \@crlf_data, "\015\012" ) ; |
23 | |
24 | test_close() ; |
25 | unlink $file ; |
26 | |
27 | exit ; |
28 | |
29 | sub init_data { |
30 | |
31 | my ( $rec_sep ) = @_ ; |
32 | |
33 | return map { ( my $data = $_ ) =~ s/RS/$rec_sep/g ; $data } |
34 | '', |
35 | 'RS', |
36 | 'RSRS', |
37 | 'RSRSRS', |
38 | "\015", |
39 | "\015RSRS", |
40 | 'abcd', |
41 | "abcdefghijRS", |
42 | "abcdefghijRS" x 512, |
43 | 'a' x (8 * 1024), |
44 | 'a' x (8 * 1024) . '0', |
45 | '0' x (8 * 1024) . '0', |
46 | 'a' x (32 * 1024), |
47 | join( 'RS', '00' .. '99', '' ), |
48 | join( 'RS', '00' .. '99' ), |
49 | join( 'RS', '0000' .. '9999', '' ), |
50 | join( 'RS', '0000' .. '9999' ), |
51 | ; |
52 | } |
53 | |
54 | sub test_read_backwards { |
55 | |
56 | my( $data_list_ref, $rec_sep ) = @_ ; |
57 | |
58 | foreach my $data ( @$data_list_ref ) { |
59 | |
60 | # write the test data to a file in text or bin_mode |
61 | |
62 | if ( defined $rec_sep ) { |
63 | |
64 | write_bin_file( $file, $data ) ; |
65 | |
66 | # print "cnt: ${\scalar @rev_file_lines}\n" ; |
67 | |
68 | } |
69 | else { |
70 | write_file( $file, $data ) ; |
71 | |
72 | } |
73 | |
74 | test_data( $rec_sep ) ; |
75 | |
76 | test_tell_handle( $rec_sep ) ; |
77 | } |
78 | } |
79 | |
80 | sub test_data { |
81 | |
82 | my( $rec_sep ) = @_ ; |
83 | |
84 | # slurp in the file and reverse the list of lines to get golden data |
85 | |
86 | my @rev_file_lines = reverse read_bin_file( $file ) ; |
87 | |
88 | # convert CR/LF to \n if needed - based on OS or we are testing CR/LF |
89 | |
90 | if ( $is_crlf || $rec_sep && $rec_sep eq "\015\012" ) { |
91 | s/\015\012\z/\n/ for @rev_file_lines ; |
92 | } |
93 | |
94 | # open the file with backwards and read in the lines |
95 | |
96 | my $bw = File::ReadBackwards->new( $file, $rec_sep ) or |
97 | die "can't open $file: $!" ; |
98 | |
99 | my( @bw_file_lines ) ; |
100 | while ( 1 ) { |
101 | |
102 | my $line = $bw->readline() ; |
103 | last unless defined( $line ) ; |
104 | push( @bw_file_lines, $line ) ; |
105 | |
106 | $line = $bw->getline() ; |
107 | last unless defined( $line ) ; |
108 | push( @bw_file_lines, $line ) ; |
109 | } |
110 | |
111 | # while ( defined( my $line = $bw->readline() ) ) { |
112 | # push( @bw_file_lines, $line) ; |
113 | # } |
114 | |
115 | # see if we close cleanly |
116 | |
117 | ok( $bw->close(), 'close' ) ; |
118 | |
119 | # compare the golden lines to the backwards lines |
120 | |
121 | if ( eq_array( \@rev_file_lines, \@bw_file_lines ) ) { |
122 | |
123 | ok( 1, 'read' ) ; |
124 | return ; |
125 | } |
126 | |
127 | # test failed so dump the different lines if verbose |
128 | |
129 | ok( 0, 'read' ) ; |
130 | |
131 | return unless $opt_v ; |
132 | |
133 | print "[$rev_file_lines[0]]\n" ; |
134 | print unpack( 'H*', $rev_file_lines[0] ), "\n" ; |
135 | print unpack( 'H*', $bw_file_lines[0] ), "\n" ; |
136 | |
137 | #print "REV ", unpack( 'H*', join '',@rev_file_lines ), "\n" ; |
138 | #print "BW ", unpack( 'H*', join '',@bw_file_lines ), "\n" ; |
139 | |
140 | } |
141 | |
142 | sub test_tell_handle { |
143 | |
144 | my( $rec_sep ) = @_ ; |
145 | |
146 | # open the file backwards again to test tell and get_handle methods |
147 | |
148 | my $bw = File::ReadBackwards->new( $file, $rec_sep ) or |
149 | die "can't open $file: $!" ; |
150 | |
151 | # read the last line in |
152 | |
153 | my $bw_line = $bw->readline() ; |
154 | |
155 | # get the current seek position |
156 | |
157 | my $pos = $bw->tell() ; |
158 | |
159 | #print "BW pos = $pos\n" ; |
160 | |
161 | if ( $bw->eof() ) { |
162 | |
163 | ok( 1, "skip tell - at eof" ) ; |
164 | ok( 1, "skip get_handle - at eof" ) ; |
165 | } |
166 | else { |
167 | |
168 | # save the current $/ so we can reassign it if it $rec_sep isn't set |
169 | |
170 | my $old_rec_sep = $/ ; |
171 | local $/ = $rec_sep || $old_rec_sep ; |
172 | |
173 | # open a new regular file and seek to this spot. |
174 | |
175 | open FH, $file or die "tell open $!" ; |
176 | seek FH, $pos, SEEK_SET or die "tell seek $!" ; |
177 | |
178 | # read in the next line and clean up the ending CR/LF |
179 | |
180 | my $fw_line = <FH> ; |
181 | $fw_line =~ s/\015\012\z/\n/ ; |
182 | |
183 | # print "BW [", unpack( 'H*', $bw_line ), |
184 | # "] TELL [", unpack( 'H*', $fw_line), "]\n" if $bw_line ne $fw_line ; |
185 | |
186 | # compare the backwards and forwards lines |
187 | |
188 | is ( $bw_line, $fw_line, "tell check" ) ; |
189 | |
190 | # get the handle and seek to the current spot |
191 | |
192 | my $fh = $bw->get_handle() ; |
193 | |
194 | # read in the next line and clean up the ending CR/LF |
195 | |
196 | my $fh_line = <$fh> ; |
197 | $fh_line =~ s/\015\012\z/\n/ ; |
198 | |
199 | # print "BW [", unpack( 'H*', $bw_line ), |
200 | # "] HANDLE [", unpack( 'H*', $fh_line), "]\n" if $bw_line ne $fh_line ; |
201 | |
202 | # compare the backwards and forwards lines |
203 | |
204 | is ( $bw_line, $fh_line, "get_handle" ) ; |
205 | } |
206 | |
207 | ok( $bw->close(), 'close2' ) ; |
208 | |
209 | } |
210 | |
211 | sub test_close { |
212 | |
213 | write_file( $file, <<BW ) ; |
214 | line1 |
215 | line2 |
216 | BW |
217 | |
218 | my $bw = File::ReadBackwards->new( $file ) or |
219 | die "can't open $file: $!" ; |
220 | |
221 | my $line = $bw->readline() ; |
222 | |
223 | $bw->close() ; |
224 | |
225 | if ( $bw->readline() ) { |
226 | |
227 | ok( 0, 'close' ) ; |
228 | return ; |
229 | } |
230 | |
231 | ok( 1, 'close' ) ; |
232 | } |
233 | |
234 | sub read_file { |
235 | |
236 | my( $file_name ) = shift ; |
237 | |
238 | local( *FH ) ; |
239 | |
240 | open( FH, $file_name ) || carp "can't open $file_name $!" ; |
241 | |
242 | local( $/ ) unless wantarray ; |
243 | |
244 | <FH> |
245 | } |
246 | |
247 | # utility sub to write a file. takes a file name and a list of strings |
248 | |
249 | sub write_file { |
250 | |
251 | my( $file_name ) = shift ; |
252 | |
253 | local( *FH ) ; |
254 | |
255 | open( FH, ">$file_name" ) || carp "can't create $file_name $!" ; |
256 | |
257 | print FH @_ ; |
258 | } |
259 | |
260 | sub read_bin_file { |
261 | |
262 | my( $file_name ) = shift ; |
263 | |
264 | local( *FH ) ; |
265 | open( FH, $file_name ) || carp "can't open $file_name $!" ; |
266 | binmode( FH ) ; |
267 | |
268 | local( $/ ) = shift if @_ ; |
269 | |
270 | local( $/ ) unless wantarray ; |
271 | |
272 | <FH> |
273 | } |
274 | |
275 | # utility sub to write a file. takes a file name and a list of strings |
276 | |
277 | sub write_bin_file { |
278 | |
279 | my( $file_name ) = shift ; |
280 | |
281 | local( *FH ) ; |
282 | open( FH, ">$file_name" ) || carp "can't create $file_name $!" ; |
283 | binmode( FH ) ; |
284 | |
285 | print FH @_ ; |
286 | } |