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changed the number of maximum digits after \x in an awk string

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hyung-hwan
2013-01-19 16:21:32 +00:00
parent 4191538b24
commit 164b85a6f9
2 changed files with 50 additions and 26 deletions
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qse/doc/page/awk-lang.md
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@ -13,9 +13,9 @@ tranforms them to an internal form for execution.
An QSEAWK program can be composed of the following elements at the top level.
- pattern-action blocks
- *BEGIN* blocks
- *END* blocks
- pattern-action blocks
- user-defined functions
- comments
- \@global variables
@ -107,17 +107,17 @@ point with a preceeding number.
34.56e # 34.56
34.56E3
An integer can be prefixed with 0x, 0, 0b for a hexa-decimal number, an octal number,
and a binary number respectively. For a hexa-decimal number, letters from A to F
can form a number case-insenstively in addition to numeric digits.
An integer can be prefixed with 0x, 0, 0b for a hexa-decimal number, an octal
number, and a binary number respectively. For a hexa-decimal number, letters
from A to F can form a number case-insenstively in addition to numeric digits.
0xA1 # 161
0xB0b0 # 45232
020 # 16
0b101 # 5
If the prefix is not followed by any numeric digits, it is still a valid token and
represents the value of 0.
If the prefix is not followed by any numeric digits, it is still a valid token
and represents the value of 0.
0x # 0x0 but not desirable.
0b # 0b0 but not desirable.
@ -127,21 +127,44 @@ represents the value of 0.
A string is enclosed in a pair of double quotes or single quotes.
A character in a string encosed in the double-quotes, when preceded with
a back-slash, changes the meaning.
a back-slash, changes the meaning.
- \\
- \a
- \b
- \uXXXX
- \UXXXXXXXX
- \\a - alert
- \\b - backspace
- \\f - formfeed
- \\n - newline
- \\r - carriage return
- \\t - horizontal tab
- \\v - vertical tab
- \\\\ - backslash
- \\" - double quote
You can use \\u and \\U in a string to specify a character by unicode if
[Character Type](@ref installation) chosen for building is the wide character
type.
You can specify a character with an octal number or a hexadecimal number.
The actual value can range between 0 and 255 inclusive.
BEGIN {
print "\uC720\uB2C8\uCF54\uB4DC \U00007D71\U00004E00\U000078BC";
}
- \\OOO - O is an octal digit.
- \\xXX - X is a hexadecimal digit.
In the octal sequence, you can specify up to 3 octal digits after \\; In the
hexadecimal sequence, you can specify as many hexadecimal digits as possible
after \\x.
If the number doesn't fit in the range that the default character type
can represent, the character generated from the sequence is undefined.
You can use \\u and \\U in a string to specify a character by a Unicode code
point if [Character Type](@ref installation) chosen for building is the
wide character type.
- \\uXXXX - X is a hexadecimal digit.
- \\UXXXXXXXX - X is a hexadecimal digit.
~~~~~{.awk}
BEGIN {
print "\uC720\uB2C8\uCF54\uB4DC \U00007D71\U00004E00\U000078BC";
}
~~~~~
This program should print 유니코드 統一碼.