The Tor Browser: intl/icu/source/extra/uconv/uconv.1.in@129ffea94266 (annotated)

intl/icu/source/extra/uconv/uconv.1.in@129ffea94266 (annotated)

intl/icu/source/extra/uconv/uconv.1.in

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 .\" Hey, Emacs! This is -*-nroff-*- you know...
 .\"
 .\" uconv.1: manual page for the uconv utility.
 .\"
 .\" Copyright (C) 2000-2013 IBM, Inc. and others.
 .\"
 .\" Manual page by Yves Arrouye <yves@realnames.com>.
 .\"
 .TH UCONV 1 "2005-jul-1" "ICU MANPAGE" "ICU @VERSION@ Manual"
 .SH NAME
 .B uconv
 \- convert data from one encoding to another
 .SH SYNOPSIS
 .B uconv
 [
 .BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
 ]
 [
 .BI "\-V\fP, \fB\-\-version"
 ]
 [
 .BI "\-s\fP, \fB\-\-silent"
 ]
 [
 .BI "\-v\fP, \fB\-\-verbose"
 ]
 [
 .BI "\-l\fP, \fB\-\-list"
 |
 .BI "\-l\fP, \fB\-\-list\-code" " code"
 |
 .BI "\-\-default-code"
 |
 .BI "\-L\fP, \fB\-\-list\-transliterators"
 ]
 [
 .BI "\-\-canon"
 ]
 [
 .BI "\-x" " transliteration
 ]
 [
 .BI "\-\-to\-callback" " callback"
 |
 .B "\-c"
 ]
 [
 .BI "\-\-from\-callback" " callback"
 |
 .B "\-i"
 ]
 [
 .BI "\-\-callback" " callback"
 ]
 [
 .BI "\-\-fallback"
 |
 .BI "\-\-no\-fallback"
 ]
 [
 .BI "\-b\fP, \fB\-\-block\-size" " size"
 ]
 [
 .BI "\-f\fP, \fB\-\-from\-code" " encoding"
 ]
 [
 .BI "\-t\fP, \fB\-\-to\-code" " encoding"
 ]
 [
 .BI "\-\-add\-signature"
 ]
 [
 .BI "\-\-remove\-signature"
 ]
 [
 .BI "\-o\fP, \fB\-\-output" " file"
 ]
 [
 .IR file .\|.\|.
 ]
 .SH DESCRIPTION
 .B uconv
 converts, or transcodes, each given
 .I file
 (or its standard input if no
 .I file
 is specified) from one
 .I encoding
 to another.
 The transcoding is done using Unicode as a pivot encoding
 (i.e. the data are first transcoded from their original encoding to
 Unicode, and then from Unicode to the destination encoding).
 .PP
 If an
 .I encoding
 is not specified or is
 .BR - ,
 the default encoding is used. Thus, calling
 .B uconv
 with no
 .I encoding
 provides an easy way to validate and sanitize data files for
 further consumption by tools requiring data in the default encoding.
 .PP
 When calling
 .BR uconv ,
 it is possible to specify callbacks that are used to handle invalid
 characters in the input, or characters that cannot be transcoded to
 the destination encoding. Some encodings, for example, offer a default
 substitution character that can be used to represent the occurence of
 such characters in the input. Other callbacks offer a useful visual
 representation of the invalid data.
 .PP
 .B uconv
 can also run the specified
 .IR transliteration
 on the transcoded data,
 in which case transliteration will happen as an intermediate step,
 after the data have been transcoded to Unicode.
 The
 .I transliteration
 can be either a list of semicolon-separated transliterator names,
 or an arbitrarily complex set of rules in the ICU transliteration
 rules format.
 .PP
 For transcoding purposes,
 .B uconv
 options are compatible with those of
 .BR iconv (1),
 making it easy to replace it in scripts. It is not necessarily the case,
 however, that the encoding names used by
 .B uconv
 and ICU are the same as the ones used by
 .BR iconv (1).
 Also, options that provide informational data, such as the
 .B \-l\fP, \fB\-\-list
 one offered by some
 .BR iconv (1)
 variants such as GNU's, produce data in a slightly different and
 easier to parse format.
 .SH OPTIONS
 .TP
 .BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
 Print help about usage and exit.
 .TP
 .BR "\-V\fP, \fB\-\-version"
 Print the version of
 .B uconv
 and exit.
 .TP
 .BI "\-s\fP, \fB\-\-silent"
 Suppress messages during execution.
 .TP
 .BI "\-v\fP, \fB\-\-verbose"
 Display extra informative messages during execution.
 .TP
 .BI "\-l\fP, \fB\-\-list"
 List all the available encodings and exit.
 .TP
 .BI "\-l\fP, \fB\-\-list\-code" " code"
 List only the
 .I code
 encoding and exit. If
 .I code
 is not a proper encoding, exit with an error.
 .TP
 .BI "\-\-default-code"
 List only the name of the default encoding and exit.
 .TP
 .BI "\-L\fP, \fB\-\-list\-transliterators"
 List all the available transliterators and exit.
 .TP
 .BI "\--canon"
 If used with
 .BI "\-l\fP, \fB\-\-list"
 or
 .BR "\-\-default-code" ,
 the list of encodings is produced in a format compatible with
 .BR convrtrs.txt (5).
 If used with
 .BR "\-L\fP, \fB\-\-list\-transliterators" ,
 print only one transliterator name per line.
 .TP
 .BI "\-x" " transliteration"
 Run the given
 .IR transliteration
 on the transcoded Unicode data,
 and use the transliterated data as input for the transcoding to
 the the destination encoding.
 .TP
 .BI "\-\-to\-callback" " callback"
 Use
 .I callback
 to handle characters that cannot be transcoded to the destination
 encoding. See section
 .B CALLBACKS
 for details on valid callbacks.
 .TP
 .B "\-c"
 Omit invalid characters from the output.
 Same as
 .BR "\-\-to\-callback skip" .
 .TP
 .BI "\-\-from\-callback" " callback"
 Use
 .I callback
 to handle characters that cannot be transcoded from the original
 encoding. See section
 .B CALLBACKS
 for details on valid callbacks.
 .TP
 .B "\-i"
 Ignore invalid sequences in the input.
 Same as
 .BR "\-\-from\-callback skip" .
 .TP
 .BI "\-\-callback" " callback"
 Use
 .I callback
 to handle both characters that cannot be transcoded from the original
 encoding and characters that cannot be transcoded to the destination
 encoding. See section
 .B CALLBACKS
 for details on valid callbacks.
 .TP
 .BI "\-\-fallback"
 Use the fallback mapping when transcoding from
 Unicode to the destination encoding.
 .TP
 .BI "\-\-no\-fallback"
 Do not use the fallback mapping when transcoding from Unicode to the
 destination encoding.
 This is the default.
 .TP
 .BI "\-b\fP, \fB\-\-block\-size" " size"
 Read input in blocks of
 .I size
 bytes at a time. The default block size is
 .
 .TP
 .BI "\-f\fP, \fB\-\-from\-code" " encoding"
 Set the original encoding of the data to
 .IR encoding .
 .TP
 .BI "\-t\fP, \fB\-\-to\-code" " encoding"
 Transcode the data to
 .IR encoding .
 .TP
 .BI "\-\-add\-signature"
 Add a U+FEFF Unicode signature character (BOM) if the output charset
 supports it and does not add one anyway.
 .TP
 .BI "\-\-remove\-signature"
 Remove a U+FEFF Unicode signature character (BOM).
 .TP
 .BI "\-o\fP, \fB\-\-output" " file"
 Write the transcoded data to
 .IR file .
 .SH CALLBACKS
 .B uconv
 supports specifying callbacks to handle invalid data. Callbacks can be
 set for both directions of transcoding: from the original encoding to
 Unicode, with the
 .BR "\-\-from\-callback"
 option, and from Unicode to the destination encoding, with the
 .BR "\-\-to\-callback"
 option.
 .PP
 The following is a list of valid
 .I callback
 names, along with a description of their behavior. The list of
 callbacks actually supported by
 .B uconv
 is displayed when it is called with
 .BR "\-h\fP, \fB\-\-help" .
 .PP
 .TP \w'\fBescape-unicode'u+3n
 .B substitute
 Write the the encoding's substitute sequence, or the Unicode
 replacement character
 .B U+FFFD
 when transcoding to Unicode.
 .TP
 .B skip
 Ignore the invalid data.
 .TP
 .B stop
 Stop with an error when encountering invalid data.
 This is the default callback.
 .TP
 .B escape
 Same as
 .BR escape-icu .
 .TP
 .B escape-icu
 Replace the missing characters with a string of the format
 .BR %U\fIhhhh\fP
 for plane 0 characters, and
 .BR %U\fIhhhh\fP%U\fIhhhh\fP
 for planes 1 and above characters,
 where
 .I hhhh
 is the hexadecimal value of one of the UTF-16 code units representing the
 character. Characters from planes 1 and above are written as a pair of
 UTF-16 surrogate code units.
 .TP
 .B escape-java
 Replace the missing characters with a string of the format
 .BR \eu\fIhhhh\fP
 for plane 0 characters, and
 .BR \eu\fIhhhh\fP\eu\fIhhhh\fP
 for planes 1 and above characters,
 where
 .I hhhh
 is the hexadecimal value of one of the UTF-16 code units representing the
 character. Characters from planes 1 and above are written as a pair of
 UTF-16 surrogate code units.
 .TP
 .B escape-c
 Replace the missing characters with a string of the format
 .BR \eu\fIhhhh\fP
 for plane 0 characters, and
 .BR \eU\fIhhhhhhhh\fP
 for planes 1 and above characters,
 where
 .I hhhh
 and
 .I hhhhhhhh
 are the hexadecimal values of the Unicode codepoint.
 .TP
 .B escape-xml
 Same as
 .BR escape-xml-hex .
 .TP
 .B escape-xml-hex
 Replace the missing characters with a string of the format
 .BR &#x\fIhhhh\fP; ,
 where
 .I hhhh
 is the hexadecimal value of the Unicode codepoint.
 .TP
 .B escape-xml-dec
 Replace the missing characters with a string of the format
 .BR &#\fInnnn\fP; ,
 where
 .I nnnn
 is the decimal value of the Unicode codepoint.
 .TP
 .B escape-unicode
 Replace the missing characters with a string of the format
 .BR {U+\fIhhhh\fP} ,
 where
 .I hhhh
 is the hexadecimal value of the Unicode codepoint.
 That hexadecimal string is of variable length and can use from 4 to
 digits.
 This is the format universally used to denote a Unicode codepoint in
 the litterature, delimited by curly braces for easy recognition of those
 substitutions in the output.
 .SH EXAMPLES
 Convert data from a given
 .I encoding
 to the platform encoding:
 .RS 4
 .B \fR$ \fPuconv \-f \fIencoding\fP
 .RE
 .PP
 Check if a
 .I file
 contains valid data for a given
 .IR encoding :
 .RS 4
 .B \fR$ \fPuconv \-f \fIencoding\fP \-c \fIfile\fP >/dev/null
 .RE
 .PP
 Convert a UTF-8
 .I file
 to a given
 .I encoding
 and ensure that the resulting text is good for any version of HTML:
 .RS 4
 .B \fR$ \fPuconv \-f utf-8 \-t \fIencoding\fP \e
 .br
 .B "    \-\-callback escape-xml-dec \fIfile\fP"
 .RE
 .PP
 Display the names of the Unicode code points in a UTF-file:
 .RS 4
 .B \fR$ \fPuconv \-f utf-8 \-x any-name \fIfile\fP
 .RE
 .PP
 Print the name of a Unicode code point whose value is known (\fBU+30AB\fP
 in this example):
 .RS 4
 .B \fR$ \fPecho '\eu30ab' | uconv \-x 'hex-any; any-name'; echo
 .br
 {KATAKANA LETTER KA}{LINE FEED}
 .br
 $
 .RE
 (The names are delimited by curly braces.
 Also, the name of the line terminator is also displayed.)
 .PP
 Normalize UTF-8 data using Unicode NFKC, remove all control characters,
 and map Katakana to Hiragana:
 .RS 4
 .B \fR$ \fPuconv \-f utf-8 \-t utf-8 \e
 .br
 .B "      \-x '::nfkc; [:Cc:] >; ::katakana-hiragana;'"
 .SH CAVEATS AND BUGS
 .B uconv
 does report errors as occuring at the first invalid byte
 encountered. This may be confusing to users of GNU
 .BR iconv (1),
 which reports errors as occuring at the first byte of an invalid
 sequence. For multi-byte character sets or encodings, this means that
 .BR uconv
 error positions may be at a later offset in the input stream than
 would be the case with GNU
 .BR iconv (1).
 .PP
 The reporting of error positions when a transliterator is used may be
 inaccurate or unavailable, in which case
 .BR uconv
 will report the offset in the output stream at which the error
 occured.
 .SH AUTHORS
 Jonas Utterstroem
 .br
 Yves Arrouye
 .SH VERSION
 @VERSION@
 .SH COPYRIGHT
 Copyright (C) 2000-2005 IBM, Inc. and others.
 .SH SEE ALSO
 .BR iconv (1)

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