| 1 |
package Pitonyak::StringUtil; |
| 2 |
|
| 3 |
#************************************************************ |
| 4 |
|
| 5 |
=head1 NAME |
| 6 |
|
| 7 |
Pitonyak::StringUtil - File and directory scanning based on regular expressions. |
| 8 |
|
| 9 |
=head1 SYNOPSIS |
| 10 |
|
| 11 |
use Pitonyak::StringUtil |
| 12 |
|
| 13 |
=head1 DESCRIPTION |
| 14 |
|
| 15 |
=cut |
| 16 |
|
| 17 |
#************************************************************ |
| 18 |
|
| 19 |
require Exporter; |
| 20 |
$VERSION = '1.01'; |
| 21 |
|
| 22 |
@ISA = qw(Exporter); |
| 23 |
@EXPORT = qw( |
| 24 |
); |
| 25 |
|
| 26 |
@EXPORT_OK = qw( |
| 27 |
array_width |
| 28 |
center_fmt |
| 29 |
compact_space |
| 30 |
hash_key_width |
| 31 |
hash_val_width |
| 32 |
left_fmt |
| 33 |
num_int_digits |
| 34 |
num_with_leading_zeros |
| 35 |
trans_blank |
| 36 |
trim_fmt |
| 37 |
trim_space |
| 38 |
right_fmt |
| 39 |
smart_printer |
| 40 |
smart_printer_default |
| 41 |
); |
| 42 |
|
| 43 |
use Carp; |
| 44 |
use strict; |
| 45 |
|
| 46 |
#************************************************************ |
| 47 |
|
| 48 |
=pod |
| 49 |
|
| 50 |
=head2 array_width |
| 51 |
|
| 52 |
=over 4 |
| 53 |
|
| 54 |
=item array_width([arg1], [arg2], ... [argn]) |
| 55 |
|
| 56 |
=back |
| 57 |
|
| 58 |
Find the maximum width of a list of elements. |
| 59 |
Each element should either be a scalar or a reference to an array. |
| 60 |
|
| 61 |
=cut |
| 62 |
|
| 63 |
#************************************************************ |
| 64 |
|
| 65 |
sub array_width { |
| 66 |
my $width = 0; |
| 67 |
my $this_width; |
| 68 |
foreach (@_) { |
| 69 |
$this_width = ( ref($_) ne 'ARRAY' ) ? length($_) : array_width(@$_); |
| 70 |
$width = $this_width if $this_width > $width; |
| 71 |
} |
| 72 |
return $width; |
| 73 |
} |
| 74 |
|
| 75 |
#************************************************************ |
| 76 |
|
| 77 |
=pod |
| 78 |
|
| 79 |
=head2 center_fmt |
| 80 |
|
| 81 |
=over 4 |
| 82 |
|
| 83 |
=item center_fmt($width_to_use, @strings_to_format) |
| 84 |
|
| 85 |
=back |
| 86 |
|
| 87 |
Center the strings in the specified width. |
| 88 |
the strings are left and right padded to use the entire width. |
| 89 |
The strings are truncated to fit into the space. |
| 90 |
|
| 91 |
=cut |
| 92 |
|
| 93 |
#************************************************************ |
| 94 |
|
| 95 |
sub center_fmt { |
| 96 |
|
| 97 |
# No parameter, return undef |
| 98 |
if ( $#_ < 1 ) { |
| 99 |
carp("Usage: center_fmt(<len> <strings to format>)"); |
| 100 |
return undef; |
| 101 |
} |
| 102 |
|
| 103 |
my $len = $_[0]; |
| 104 |
my @strings = trim_fmt(@_); |
| 105 |
my @rc; |
| 106 |
foreach my $str (@strings) { |
| 107 |
my $slop = $len - length($str); |
| 108 |
my $left_space = int( $slop / 2 ); |
| 109 |
my $right_space = $slop - $left_space; |
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$str = " " x $left_space . $str . " " x $right_space if $slop > 0; |
| 111 |
push ( @rc, $str ); |
| 112 |
} |
| 113 |
return wantarray ? @strings : $strings[0]; |
| 114 |
} |
| 115 |
|
| 116 |
#************************************************************ |
| 117 |
|
| 118 |
=pod |
| 119 |
|
| 120 |
=head2 compact_space |
| 121 |
|
| 122 |
=over 4 |
| 123 |
|
| 124 |
=item compact_space(@list_of_strings) |
| 125 |
|
| 126 |
=back |
| 127 |
|
| 128 |
Removes the spaces from the strings. |
| 129 |
|
| 130 |
Each string is potentially modified. |
| 131 |
Leading and trailing white space is removed. |
| 132 |
Runs of white space is turned to one space. |
| 133 |
This modifies the calling parameters. |
| 134 |
|
| 135 |
=cut |
| 136 |
|
| 137 |
#************************************************************ |
| 138 |
|
| 139 |
sub compact_space { |
| 140 |
|
| 141 |
# No parameter, return undef |
| 142 |
if ( $#_ < 0 ) { |
| 143 |
carp("Usage: compact_space(<strings to compact>"); |
| 144 |
return undef; |
| 145 |
} |
| 146 |
|
| 147 |
for (@_) { |
| 148 |
|
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# |
| 150 |
# This new method is about four times faster |
| 151 |
# than the split and join |
| 152 |
# $_ = join ' ', split /\s+/, $_; # split then join |
| 153 |
# |
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tr/ //s; |
| 155 |
|
| 156 |
# |
| 157 |
# Save a call to trim_space() at the end! |
| 158 |
# |
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s/^\s*//; # Remove spaces from front |
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s/\s*$//; # Remove spaces from end |
| 161 |
} |
| 162 |
return wantarray ? @_ : $_[0]; |
| 163 |
} |
| 164 |
|
| 165 |
#************************************************************ |
| 166 |
|
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=pod |
| 168 |
|
| 169 |
=head2 hash_key_width |
| 170 |
|
| 171 |
=over 4 |
| 172 |
|
| 173 |
=item hash_key_width($hash_reference) |
| 174 |
|
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=back |
| 176 |
|
| 177 |
Determine the maximum width of the keys in this hash |
| 178 |
|
| 179 |
=cut |
| 180 |
|
| 181 |
#************************************************************ |
| 182 |
|
| 183 |
sub hash_key_width(\%) { |
| 184 |
|
| 185 |
# No parameter, return 0 |
| 186 |
if ( $#_ < 0 || !UNIVERSAL::isa( $_[0], 'HASH' ) ) { |
| 187 |
carp("Usage: hash_key_width(<hash_reference>)"); |
| 188 |
return 0; |
| 189 |
} |
| 190 |
|
| 191 |
my $hash_ref = shift; |
| 192 |
my $ref_type = ref($hash_ref); |
| 193 |
my $width = 0; |
| 194 |
foreach my $key ( keys %$hash_ref ) { |
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$width = length($key) if length($key) > $width; |
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} |
| 197 |
return $width; |
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} |
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|
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#************************************************************ |
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|
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=pod |
| 203 |
|
| 204 |
=head2 hash_val_width |
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|
| 206 |
=over 4 |
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|
| 208 |
=item hash_val_width($hash_reference) |
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|
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=back |
| 211 |
|
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Determine the maximum width of the values in this hash |
| 213 |
|
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=cut |
| 215 |
|
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#************************************************************ |
| 217 |
|
| 218 |
sub hash_val_width(\%) { |
| 219 |
|
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# No parameter, return 0 |
| 221 |
if ( $#_ < 0 || !UNIVERSAL::isa( $_[0], 'HASH' ) ) { |
| 222 |
carp("Usage: hash_val_width(<hash_reference>)"); |
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return 0; |
| 224 |
} |
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|
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my $hash_ref = shift; |
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my $ref_type = ref($hash_ref); |
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my $width = 0; |
| 229 |
foreach my $key ( keys %$hash_ref ) { |
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$width = length( $hash_ref->{$key} ) |
| 231 |
if length( $hash_ref->{$key} ) > $width; |
| 232 |
} |
| 233 |
return $width; |
| 234 |
} |
| 235 |
|
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#************************************************************ |
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|
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=pod |
| 239 |
|
| 240 |
=head2 left_fmt |
| 241 |
|
| 242 |
=over 4 |
| 243 |
|
| 244 |
=item left_fmt($width_to_use, @strings_to_format) |
| 245 |
|
| 246 |
=back |
| 247 |
|
| 248 |
Each string has enough spaces appended end so that the |
| 249 |
total length is C<$width_to_use>. |
| 250 |
The strings are not truncated to fit into the space. |
| 251 |
|
| 252 |
=cut |
| 253 |
|
| 254 |
#************************************************************ |
| 255 |
|
| 256 |
sub left_fmt { |
| 257 |
|
| 258 |
# No parameter, return undef |
| 259 |
if ( $#_ < 1 ) { |
| 260 |
carp("Usage: left_fmt(<len> <strings to format>)"); |
| 261 |
return undef; |
| 262 |
} |
| 263 |
|
| 264 |
my $len = shift; |
| 265 |
my @rc; |
| 266 |
foreach my $str (@_) { |
| 267 |
my $slop = $len - length($str); |
| 268 |
$str = $str . " " x $slop if $slop > 0; |
| 269 |
push ( @rc, $str ); |
| 270 |
} |
| 271 |
return wantarray ? @rc : $rc[0]; |
| 272 |
} |
| 273 |
|
| 274 |
#************************************************************ |
| 275 |
|
| 276 |
=pod |
| 277 |
|
| 278 |
=head2 num_int_digits |
| 279 |
|
| 280 |
=over 4 |
| 281 |
|
| 282 |
=item num_int_digits($number) |
| 283 |
|
| 284 |
=back |
| 285 |
|
| 286 |
This returns the length of a number |
| 287 |
|
| 288 |
=cut |
| 289 |
|
| 290 |
#************************************************************ |
| 291 |
|
| 292 |
sub num_int_digits { |
| 293 |
|
| 294 |
# No parameter, return undef |
| 295 |
if ( $#_ < 0 ) { |
| 296 |
carp("Usage: num_int_digits(<number>"); |
| 297 |
return undef; |
| 298 |
} |
| 299 |
return length( sprintf( "%d", $_[0] ) ); |
| 300 |
} |
| 301 |
|
| 302 |
#************************************************************ |
| 303 |
|
| 304 |
=pod |
| 305 |
|
| 306 |
=head2 num_with_leading_zeros |
| 307 |
|
| 308 |
=over 4 |
| 309 |
|
| 310 |
=item num_with_leading_zeros(($width_to_use, @numbers_to_format) |
| 311 |
|
| 312 |
=back |
| 313 |
|
| 314 |
Returns N-digit strings representing the number with leading zeros. |
| 315 |
|
| 316 |
Modulo is used to chop the number. |
| 317 |
|
| 318 |
If C<numDigits E<lt> 0>, then leading negative signs are included. |
| 319 |
|
| 320 |
=cut |
| 321 |
|
| 322 |
#************************************************************ |
| 323 |
|
| 324 |
sub num_with_leading_zeros($$) { |
| 325 |
|
| 326 |
# No parameter, return undef |
| 327 |
if ( $#_ < 1 ) { |
| 328 |
carp("Usage: num_with_leading_zeros(<length> <list of numbers>"); |
| 329 |
return undef; |
| 330 |
} |
| 331 |
|
| 332 |
my $num_digits = shift; |
| 333 |
my @rc; |
| 334 |
foreach (@_) { |
| 335 |
my $num = $_; |
| 336 |
my $rvalue = ""; |
| 337 |
if ( $num_digits != 0 ) { |
| 338 |
if ( $num_digits < 0 ) { |
| 339 |
$num_digits = -$num_digits; |
| 340 |
if ( $num < 0 ) { |
| 341 |
--$num_digits; |
| 342 |
$rvalue = "-"; |
| 343 |
} |
| 344 |
} |
| 345 |
$num = -$num if $num < 0; |
| 346 |
my $tmp = sprintf "%d", $num; |
| 347 |
my $lead_zero = $num_digits - length($tmp); |
| 348 |
if ( $lead_zero > 0 ) { |
| 349 |
$rvalue .= "0" x $lead_zero . $tmp; |
| 350 |
} |
| 351 |
else { |
| 352 |
$rvalue .= substr $tmp, $[ - $lead_zero; |
| 353 |
} |
| 354 |
} |
| 355 |
push ( @rc, $rvalue ); |
| 356 |
} |
| 357 |
return wantarray ? @rc : $rc[0]; |
| 358 |
} |
| 359 |
|
| 360 |
#************************************************************ |
| 361 |
|
| 362 |
=pod |
| 363 |
|
| 364 |
=head2 trans_blank |
| 365 |
|
| 366 |
=over 4 |
| 367 |
|
| 368 |
=item trans_blank($value, [$default]) |
| 369 |
|
| 370 |
=back |
| 371 |
|
| 372 |
Returns $value if it is defined with length greater than zero and C<$default> if it is not. |
| 373 |
|
| 374 |
If $default is not included, then an empty string is used for C<$default>. |
| 375 |
|
| 376 |
=cut |
| 377 |
|
| 378 |
#************************************************************ |
| 379 |
|
| 380 |
sub trans_blank { |
| 381 |
|
| 382 |
# No parameter, return undef |
| 383 |
if ( $#_ < 0 ) { |
| 384 |
carp("Usage: trans_blank(<string> [<return if undef>])"); |
| 385 |
return undef; |
| 386 |
} |
| 387 |
|
| 388 |
my $default_value = ""; |
| 389 |
$default_value = $_[1] if $#_ > 0; |
| 390 |
$default_value = $_[0] if defined( $_[0] ) && length( $_[0] ) > 0; |
| 391 |
return $default_value; |
| 392 |
} |
| 393 |
|
| 394 |
#************************************************************ |
| 395 |
|
| 396 |
=pod |
| 397 |
|
| 398 |
=head2 trim_fmt |
| 399 |
|
| 400 |
=over 4 |
| 401 |
|
| 402 |
=item trim_fmt($width_to_use, @strings_to_format) |
| 403 |
|
| 404 |
=back |
| 405 |
|
| 406 |
Trim all strings so that their length is not greater than |
| 407 |
C<$width_to_use>. |
| 408 |
|
| 409 |
=cut |
| 410 |
|
| 411 |
#************************************************************ |
| 412 |
|
| 413 |
sub trim_fmt { |
| 414 |
|
| 415 |
# No parameter, return undef |
| 416 |
if ( $#_ < 1 ) { |
| 417 |
carp("Usage: trim_fmt(<len> <strings to format>)"); |
| 418 |
return undef; |
| 419 |
} |
| 420 |
|
| 421 |
my $len = shift; |
| 422 |
my @rc; |
| 423 |
foreach my $str (@_) { |
| 424 |
my $slop = $len - length($str); |
| 425 |
$str = substr( $str, $[, $len ) if $slop < 0; |
| 426 |
push ( @rc, $str ); |
| 427 |
} |
| 428 |
return wantarray ? @rc : $rc[0]; |
| 429 |
} |
| 430 |
|
| 431 |
#************************************************************ |
| 432 |
|
| 433 |
=pod |
| 434 |
|
| 435 |
=head2 trim_space |
| 436 |
|
| 437 |
=over 4 |
| 438 |
|
| 439 |
=item trim_space(@strings_to_format) |
| 440 |
|
| 441 |
=back |
| 442 |
|
| 443 |
Remove leading and trailing white space. |
| 444 |
The parameters are modified. |
| 445 |
|
| 446 |
=cut |
| 447 |
|
| 448 |
#************************************************************ |
| 449 |
|
| 450 |
sub trim_space { |
| 451 |
|
| 452 |
# No parameter, return undef |
| 453 |
if ( $#_ < 0 ) { |
| 454 |
carp("Usage: trim_space(<strings to compact>"); |
| 455 |
return undef; |
| 456 |
} |
| 457 |
|
| 458 |
for (@_) { |
| 459 |
s/^\s*//; # Remove spaces from front |
| 460 |
s/\s*$//; # Remove spaces from end |
| 461 |
# |
| 462 |
# The following takes longer: |
| 463 |
# |
| 464 |
#($_) = ($_ =~ /^\s*(.*?)\s*$/); |
| 465 |
} |
| 466 |
return wantarray ? @_ : $_[0]; |
| 467 |
} |
| 468 |
|
| 469 |
#************************************************************ |
| 470 |
|
| 471 |
=pod |
| 472 |
|
| 473 |
=head2 right_fmt |
| 474 |
|
| 475 |
=over 4 |
| 476 |
|
| 477 |
=item right_fmt($width_to_use, @strings_to_format) |
| 478 |
|
| 479 |
=back |
| 480 |
|
| 481 |
Each string has enough spaces prepended end so that the |
| 482 |
total length is C<$width_to_use>. |
| 483 |
The strings are not truncated to fit into the space. |
| 484 |
|
| 485 |
=cut |
| 486 |
|
| 487 |
#************************************************************ |
| 488 |
|
| 489 |
sub right_fmt { |
| 490 |
|
| 491 |
# No parameter, return undef |
| 492 |
if ( $#_ < 1 ) { |
| 493 |
carp("Usage: right_fmt(<len> <strings to format>)"); |
| 494 |
return undef; |
| 495 |
} |
| 496 |
|
| 497 |
my $len = shift; |
| 498 |
my @rc; |
| 499 |
foreach my $str (@_) { |
| 500 |
my $slop = $len - length($str); |
| 501 |
$str = " " x $slop . $str if $slop > 0; |
| 502 |
push ( @rc, $str ); |
| 503 |
} |
| 504 |
return wantarray ? @rc : $rc[0]; |
| 505 |
} |
| 506 |
|
| 507 |
#************************************************************ |
| 508 |
#** ** |
| 509 |
#** Input: left indent to print ** |
| 510 |
#** how to grow left indent for recursive printing ** |
| 511 |
#** Separator for items (generally "\n") ** |
| 512 |
#** list of things to print ** |
| 513 |
#** ** |
| 514 |
#** Output: String you desire to print ** |
| 515 |
#** ** |
| 516 |
#** Notes: ** |
| 517 |
#** Apart from being stuck with the output format, ** |
| 518 |
#** this has problems with references to references ** |
| 519 |
#** printing ony the text REF rather than simply ** |
| 520 |
#** recursing the references which would not be ** |
| 521 |
#** that difficult. ** |
| 522 |
#** ** |
| 523 |
#************************************************************ |
| 524 |
|
| 525 |
#************************************************************ |
| 526 |
|
| 527 |
=pod |
| 528 |
|
| 529 |
=head2 smart_printer |
| 530 |
|
| 531 |
=over 4 |
| 532 |
|
| 533 |
=item smart_printer($left, $left_grow, $separator, @Things_to_print) |
| 534 |
|
| 535 |
=back |
| 536 |
|
| 537 |
Attempts to print almost any object in a pretty fashion. |
| 538 |
The C<$left> parameter determines what is printed before each thing printed. |
| 539 |
The C<$left_grow> parameter determines the new C<$left> if smart_printer() is recursively called. |
| 540 |
the C<$separator> is printed between each item. |
| 541 |
|
| 542 |
|
| 543 |
A Scalar is printed. |
| 544 |
|
| 545 |
A Hash is printed as C<{ key =E<gt> value key =E<gt> value }> |
| 546 |
|
| 547 |
An Array is printed as C<( value value )> |
| 548 |
|
| 549 |
Keys and values can also be references. |
| 550 |
|
| 551 |
=cut |
| 552 |
|
| 553 |
#************************************************************ |
| 554 |
|
| 555 |
sub smart_printer { |
| 556 |
if ( $#_ < 3 ) { |
| 557 |
carp( |
| 558 |
"usage: smart_printer(<left> <left_grow> <item_seperator> <things to print>)" |
| 559 |
); |
| 560 |
return undef; |
| 561 |
} |
| 562 |
|
| 563 |
my $indent = shift; |
| 564 |
my $indent_grow = shift; |
| 565 |
my $item_separator = shift; |
| 566 |
my $txt = ''; |
| 567 |
foreach my $thing_to_print (@_) { |
| 568 |
if ( !defined($thing_to_print) ) { |
| 569 |
$txt .= $indent . 'undef' . $item_separator; |
| 570 |
} |
| 571 |
else { |
| 572 |
my $ref_type = ref $thing_to_print; |
| 573 |
if ( !$ref_type ) { |
| 574 |
$txt .= "$indent$thing_to_print$item_separator"; |
| 575 |
} |
| 576 |
elsif ( $ref_type eq 'SCALAR' ) { |
| 577 |
$txt .= smart_printer( $indent, $indent_grow, $item_separator, |
| 578 |
$$thing_to_print ); |
| 579 |
} |
| 580 |
elsif ( $ref_type eq 'ARRAY' ) { |
| 581 |
$txt .= "$indent($item_separator"; |
| 582 |
foreach my $array_thing (@$thing_to_print) { |
| 583 |
$txt .= smart_printer( |
| 584 |
$indent . $indent_grow, $indent_grow, |
| 585 |
$item_separator, $array_thing |
| 586 |
); |
| 587 |
} |
| 588 |
$txt .= "$indent)$item_separator"; |
| 589 |
} |
| 590 |
elsif ( UNIVERSAL::isa( $thing_to_print, 'HASH' ) ) { |
| 591 |
my $width = hash_key_width(%$thing_to_print); |
| 592 |
|
| 593 |
# |
| 594 |
# Remember that each hash has one universal iterator |
| 595 |
# recursive nesting will therefore cause stranger |
| 596 |
# results than a simple infinite loop. |
| 597 |
# |
| 598 |
$txt .= "$indent\{$item_separator"; |
| 599 |
my ( $key, $value ); |
| 600 |
while ( ( $key, $value ) = each %$thing_to_print ) { |
| 601 |
$txt .= $indent |
| 602 |
. $indent_grow |
| 603 |
. left_fmt( $width, $key ) . ' => '; |
| 604 |
$value = '' if !defined($value); |
| 605 |
if ( !ref($value) ) { |
| 606 |
$txt .= "$value$item_separator"; |
| 607 |
} |
| 608 |
elsif ( ref($value) eq 'SCALAR' ) { |
| 609 |
$txt .= |
| 610 |
smart_printer( '', $indent_grow, $item_separator, |
| 611 |
$value ); |
| 612 |
} |
| 613 |
else { |
| 614 |
$txt .= $item_separator; |
| 615 |
$txt .= |
| 616 |
smart_printer( $indent . $indent_grow . $indent_grow, |
| 617 |
$indent_grow, $item_separator, $value ); |
| 618 |
} |
| 619 |
} |
| 620 |
$txt .= "$indent}$item_separator"; |
| 621 |
} |
| 622 |
else { |
| 623 |
$txt .= "$indent$ref_type$item_separator"; |
| 624 |
|
| 625 |
$txt .= "$indent<$item_separator"; |
| 626 |
$txt .= smart_printer( |
| 627 |
$indent . $indent_grow, $indent_grow, |
| 628 |
$item_separator, $$thing_to_print |
| 629 |
); |
| 630 |
$txt .= "$indent>$item_separator"; |
| 631 |
} |
| 632 |
} |
| 633 |
} |
| 634 |
return $txt; |
| 635 |
} |
| 636 |
|
| 637 |
#************************************************************ |
| 638 |
|
| 639 |
=pod |
| 640 |
|
| 641 |
=head2 smart_printer_default |
| 642 |
|
| 643 |
=over 4 |
| 644 |
|
| 645 |
=item smart_printer_default(Things to print) |
| 646 |
|
| 647 |
=back |
| 648 |
|
| 649 |
Each parameter is printed using smart_printer() using default parameters. |
| 650 |
the items are printed with no initial left indent, |
| 651 |
recursive indents using two extra spaces, and a new line for the |
| 652 |
item separator. |
| 653 |
|
| 654 |
=cut |
| 655 |
|
| 656 |
#************************************************************ |
| 657 |
|
| 658 |
sub smart_printer_default { |
| 659 |
return smart_printer( '', ' ', "\n", @_ ); |
| 660 |
} |
| 661 |
|
| 662 |
#************************************************************ |
| 663 |
|
| 664 |
=pod |
| 665 |
|
| 666 |
=head1 COPYRIGHT |
| 667 |
|
| 668 |
Copyright 1998-2002, Andrew Pitonyak (perlboy@pitonyak.org) |
| 669 |
|
| 670 |
This library is free software; you can redistribute it and/or |
| 671 |
modify it under the same terms as Perl itself. |
| 672 |
|
| 673 |
=head1 Modification History |
| 674 |
|
| 675 |
=head2 March 13, 1998 |
| 676 |
|
| 677 |
Version 1.00 First release |
| 678 |
|
| 679 |
=head2 September 10, 2002 |
| 680 |
|
| 681 |
Version 1.01 Changed internal documentation to POD |
| 682 |
|
| 683 |
=cut |
| 684 |
|
| 685 |
#************************************************************ |
| 686 |
|
| 687 |
1; |
| 688 |
|