chrtbl(1M) UNIX System V(System Administration Utilities) 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/lower-case 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/chrtblC 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 /usr/include/ctype.h; for example, L means a character is lower case
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 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 LCCTYPE read in from file. Before this
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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 LCCTYPE 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
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and conversion tables in this file, set the LCCTYPE 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 LCNUMERIC read in from file.
Before this file can be used, it must be installed in the
/usr/lib/locale/locale directory with the name LCNUMERIC 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 LCNUMERIC
environment variable appropriately (see environ(5) or setlocale(3C)).
The name of the locale where you install the files LCCTYPE and
LCNUMERIC 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.
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 lower-case 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:
LCCTYPE name of the data file created by chrtbl to contain
character classification, conversion, and width
information
isupper character codes to be classified as upper-case letters
islower character codes to be classified as lower-case 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
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isxdigit character codes to be classified as hexadecimal digits
ul relationship between upper- and lower-case characters
cswidth byte and screen width information (by default, each is
one character wide)
LCNUMERIC name of the data file created by chrtbl to contain
numeric formatting information
decimalpoint decimal delimiter
thousandssep 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 lower-case letters (ul) is expressed
as ordered pairs of octal or hexadecimal constants: <upper-
case_character lower-case_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:
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
n3 byte width for supplementary code set 3
s3 screen width for supplementary code set 3
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chrtbl(1M) UNIX System V(System Administration Utilities) chrtbl(1M)
decimalpoint and thousandssep 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.
EXAMPLE
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"
FILES
/usr/lib/locale/locale/LCCTYPE
data files containing character classification,
conversion, and character-set width information created
by chrtbl
/usr/lib/locale/locale/LCNUMERIC
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/chrtblC
input file used to construct LCCTYPE and LCNUMERIC in
the default locale.
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SEE ALSO
environ(5).
ctype(3C), setlocale(3C) in the Programmer's Reference Manual.
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.
WARNING
Changing the files in /usr/lib/locale/C will cause the system to behave
unpredictably.
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