chrtbl(1M) chrtbl(1M)
NAME
chrtbl - generate character classification and conversion
tables
SYNOPSIS
chrtbl [file]
DESCRIPTION
The chrtbl command creates two tables containing information
on character classification, upper/lowercase conversion,
character-set width, and numeric formatting. One table is an
array of (257*2) + 7 bytes that is encoded so a table lookup
can be used to determine the character classification of a
character, convert a character [see ctype(3C)], and find the
byte and screen width of a character in one of the
supplementary code sets. The other table contains information
about the format of non-monetary numeric quantities: the first
byte specifies the decimal delimiter; the second byte
specifies the thousands delimiter; and the remaining bytes
comprise a null-terminated string indicating the grouping
(each element of the string is taken as an integer that
indicates the number of digits that comprise the current group
in a formatted non-monetary numeric quantity).
chrtbl reads the user-defined character classification and
conversion information from file and creates three output
files in the current directory. To construct file, use the
file supplied in /usr/lib/locale/C/chrtbl_C as a starting
point. You may add entries, but do not change the original
values supplied with the system. For example, for other
locales you may wish to add eight-bit entries to the ASCII
definitions provided in this file.
One output file, ctype.c (a C language source file), contains
a (257*2)+7-byte array generated from processing the
information from file. You should review the content of
ctype.c to verify that the array is set up as you had planned.
(In addition, an application program could use ctype.c.) The
first 257 bytes of the array in ctype.c are used for character
classification. The characters used for initializing these
bytes of the array represent character classifications that
are defined in ctype.h; for example, _L means a character is
lowercase and _S|_B means the character is both a spacing
character and a blank. The second 257 bytes of the array are
used for character conversion. These bytes of the array are
initialized so that characters for which you do not provide
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conversion information will be converted to themselves. When
you do provide conversion information, the first value of the
pair is stored where the second one would be stored normally,
and vice versa; for example, if you provide <0x41 0x61>, then
0x61 is stored where 0x41 would be stored normally, and 0x61
is stored where 0x41 would be stored normally. The last 7
bytes are used for character width information for up to three
supplementary code sets.
The second output file (a data file) contains the same
information, but is structured for efficient use by the
character classification and conversion routines [see
ctype(3C)]. The name of this output file is the value you
assign to the keyword LC_CTYPE read in from file. Before this
file can be used by the character classification and
conversion routines, it must be installed in the
/usr/lib/locale/locale directory with the name LC_CTYPE by
someone who is super-user or a member of group bin. This file
must be readable by user, group, and other; no other
permissions should be set. To use the character
classification
and conversion tables in this file, set the LC_CTYPE
environment variable appropriately [see environ(5) or
setlocale(3C)].
The third output file (a data file) is created only if numeric
formatting information is specified in the input file. The
name of this output file is the value you assign to the
keyword LC_NUMERIC read in from file. Before this file can be
used, it must be installed in the /usr/lib/locale/locale
directory with the name LC_NUMERIC by someone who is super-
user or a member of group bin. This file must be readable by
user, group, and other; no other permissions should be set.
To use the numeric formatting information in this file, set
the LC_NUMERIC environment variable appropriately [see
environ(5) or setlocale(3C)].
The name of the locale where you install the files LC_CTYPE
and LC_NUMERIC should correspond to the conventions defined in
file. For example, if French conventions were defined, and
the name for the French locale on your system is french, then
you should install the files in /usr/lib/locale/french.
If no input file is given, or if the argument ``-'' is
encountered, chrtbl reads from standard input.
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The syntax of file allows the user to define the names of the
data files created by chrtbl, the assignment of characters to
character classifications, the relationship between upper and
lowercase letters, byte and screen widths for up to three
supplementary code sets, and three items of numeric formatting
information: the decimal delimiter, the thousands delimiter,
and the grouping. The keywords recognized by chrtbl are:
LC_CTYPE name of the data file created by chrtbl to
contain character classification, conversion,
and width information
isupper character codes to be classified as uppercase
letters
islower character codes to be classified as lowercase
letters
isdigit character codes to be classified as numeric
isspace character codes to be classified as spacing
(delimiter) characters
ispunct character codes to be classified as
punctuation characters
iscntrl character codes to be classified as control
characters
isblank character code for the blank (space)
character
isxdigit character codes to be classified as
hexadecimal digits
ul relationship between upper- and lowercase
characters
cswidth byte and screen width information (by
default, each is one character wide)
LC_NUMERIC name of the data file created by chrtbl to
contain numeric formatting information
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decimal_point decimal delimiter
thousands_sep thousands delimiter
grouping string in which each element is taken as an
integer that indicates the number of digits
that comprise the current group in a
formatted non-monetary numeric quantity.
Any lines with the number sign (#) in the first column are
treated as comments and are ignored. Blank lines are also
ignored.
Characters for isupper, islower, isdigit, isspace, ispunct,
iscntrl, isblank, isxdigit, and ul can be represented as a
hexadecimal or octal constant (for example, the letter a can
be represented as 0x61 in hexadecimal or 0141 in octal).
Hexadecimal and octal constants may be separated by one or
more space and/or tab characters.
The dash character (-) may be used to indicate a range of
consecutive numbers. Zero or more space characters may be
used for separating the dash character from the numbers.
The backslash character (\) is used for line continuation.
Only a carriage return is permitted after the backslash
character.
The relationship between upper- and lowercase letters (ul) is
expressed as ordered pairs of octal or hexadecimal constants:
<uppercase_character lowercase_character>. These two
constants may be separated by one or more space characters.
Zero or more space characters may be used for separating the
angle brackets (< >) from the numbers.
The following is the format of an input specification for
cswidth:
cswidth n1[[:s1][,n2[:s2][,n3[:s3]]]]
where,
n1 byte width for supplementary code set 1, required
s1 screen width for supplementary code set 1
n2 byte width for supplementary code set 2
s2 screen width for supplementary code set 2
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n3 byte width for supplementary code set 3
s3 screen width for supplementary code set 3
decimal_point and thousands_sep are specified by a single
character that gives the delimiter. grouping is specified by
a quoted string in which each member may be in octal or hex
representation. For example, \3 or \x3 could be used to set
the value of a member of the string to 3.
In a C locale, or in a locale where the decimal point
character is not defined, the decimal point character defaults
to a period (.).
EXAMPLES
The following is an example of an input file used to create
the USA-ENGLISH code set definition table in a file named usa
and the non-monetary numeric formatting information in a file
name num-usa.
LC_CTYPE usa
isupper 0x41 - 0x5a
islower 0x61 - 0x7a
isdigit 0x30 - 0x39
isspace 0x20 0x9 - 0xd
ispunct 0x21 - 0x2f 0x3a - 0x40 \
0x5b - 0x60 0x7b - 0x7e
iscntrl 0x0 - 0x1f 0x7f
isblank 0x20
isxdigit 0x30 - 0x39 0x61 - 0x66 \
0x41 - 0x46
ul <0x41 0x61> <0x42 0x62> <0x43 0x63> \
<0x44 0x64> <0x45 0x65> <0x46 0x66> \
<0x47 0x67> <0x48 0x68> <0x49 0x69> \
<0x4a 0x6a> <0x4b 0x6b> <0x4c 0x6c> \
<0x4d 0x6d> <0x4e 0x6e> <0x4f 0x6f> \
<0x50 0x70> <0x51 0x71> <0x52 0x72> \
<0x53 0x73> <0x54 0x74> <0x55 0x75> \
<0x56 0x76> <0x57 0x77> <0x58 0x78> \
<0x59 0x79> <0x5a 0x7a>
cswidth 1:1,0:0,0:0
LC_NUMERIC num_usa
decimal_point .
thousands_sep ,
grouping "\3"
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FILES
/usr/lib/locale/locale/LC_CTYPE
data files containing character classification,
conversion, and character-set width information created
by chrtbl
/usr/lib/locale/locale/LC_NUMERIC
data files containing numeric formatting information
created by chrtbl
/usr/include/ctype.h
header file containing information used by character
classification and conversion routines
/usr/lib/locale/C/chrtbl_C
input file used to construct LC_CTYPE and LC_NUMERIC in
the default locale.
REFERENCES
ctype(3C), environ(5), setlocale(3C)
DIAGNOSTICS
The error messages produced by chrtbl are intended to be
self-explanatory. They indicate errors in the command line or
syntactic errors encountered within the input file.
NOTICES
Changing the files in /usr/lib/locale/C will cause the system
to behave unpredictably.
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