07-11-2007
Read First Character of Each Line in File
I need a better way to read the first character of each line in a file and check if it equals the special character ¤. This character tells me where there is a break in the reports. The file has over 500,000 lines. Currently, this is my code -
if [[ $(echo $line|cut -c1-1) = "¤" ]]
I am using Korn Shell as a scripting language. Is there a better way to do this?
Thank you for your assistance.
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LEARN ABOUT OSF1
iso-2022
iso2022(5) File Formats Manual iso2022(5)
NAME
iso2022, iso-2022, ISO-2022 - A character encoding mechanism standardized by the International Standards Organization (ISO)
DESCRIPTION
The ISO-2022 standard defines a mechanism for handling single-byte and multibyte characters. The standard specifies four classes of charac-
ter sets: The 94-charset class, which contains character sets with 94 positions (single-byte characters). Examples are the ASCII and JIS
X0201 character sets. The 96-charset class, which contains character sets with 96 positions (single-byte characters). Examples are the ISO
Latin series of character sets. The 94x94-charset class, which contains character sets with 94x94 positions (2-byte characters). Examples
are the GB 2312 and the CNS 11643 character sets. The 96x96-charset class, which contains character sets with 96x96 positions (2-byte
characters).
In the ISO-2022 standard, four registers, called G0, G1, G2 and G3, are used to reference a character set. Before a character set can be
used, the character set must be assigned, or designated, to one of these registers. The designation of a character set is done by using an
escape sequence in the following format:
ESC [I] F
In this format: Is an intermediate character that is used to designate a character set to one of the registers (G0, G1, G2, oR G3). Is a
unique final character of a particular character set.
The designation of a character set, whose final character is F, to different registers is as follows: Designates a multibyte character set
(94x94 or 96x96) to G0. Designates a character set in the 94-charset class to G0. Designates a character set in the 94-charset class to
G1. Designates a character set in the 94-charset class to G2. Designates a character set in the 94-charset class to G3. Designates a
character set in the 96-charset class to G1. Designates a character set in the 96-charset class to G2. Designates a character set in the
96-charset class to G3.
SEE ALSO
Commands: locale(1)
Others: ascii(5), i18n_intro(5), iso2022jp(5), l10n_intro(5)
iso2022(5)