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/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.
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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 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 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
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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 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.
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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
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.
LCCTYPE 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
LCNUMERIC numusa
decimalpoint .
thousandssep ,
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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.
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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