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/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 /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 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. 

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:

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 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

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)

LC_NUMERIC name of the data file created by chrtbl to contain numeric formatting information

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 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,

n1byte width for supplementary code set 1, required s1screen 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

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. 

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 - 0x2f0x3a - 0x40\
          0x5b - 0x600x7b - 0x7e
iscntrl   0x0 - 0x1f0x7f
isblank   0x20
isxdigit  0x30 - 0x390x61 - 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>
cswidth1:1,0:0,0:0
LC_NUMERICnum_usa
decimal_point.
thousands_sep,
grouping"\3"

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. 

SEE ALSO

ctype(3C), setlocale(3C), environ(5). 

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. 

NOTES

Changing the files in /usr/lib/locale/C will cause the system to behave unpredictably. 

Only lower case hex values are allowed in input specification. 

  —  System Administration Utilities