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Added entries for the curses.ascii module.

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Fred Drake 2000-06-28 22:03:29 +00:00
parent 6da3434e03
commit 5ccd4b2a54
2 changed files with 90 additions and 47 deletions
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1
Doc/Makefile.deps
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@ -218,6 +218,7 @@ LIBFILES= $(MANSTYLES) $(COMMONTEX) \
../lib/libchunk.tex \
../lib/libcodeop.tex \
../lib/libcurses.tex \
../lib/libascii.tex \
../lib/libdl.tex \
../lib/libmutex.tex \
../lib/libnis.tex \

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Doc/lib/libascii.tex
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@ -1,131 +1,173 @@
\section{\module{curses.ascii} ---
Constants and set-membership functions for ASCII characters.}
Utilities for ASCII characters}
\declaremodule{standard}{curses.ascii}
\modulesynopsis{Constants and set-membership functions for ASCII characters.}
\modulesynopsis{Constants and set-membership functions for
\ASCII{} characters.}
\moduleauthor{Eric S. Raymond}{esr@thyrsus.com}
\sectionauthor{Eric S. Raymond}{esr@thyrsus.com}
\versionadded{1.6}
The \module{curses.ascii} module supplies name constants for ASCII characters
and functions to test membership in various ASCII character classes.
The constants supplied are names for control characters as follows:
The \module{curses.ascii} module supplies name constants for
\ASCII{} characters and functions to test membership in various
\ASCII{} character classes. The constants supplied are names for
control characters as follows:
NUL, SOH, STX, ETX, EOT, ENQ, ACK, BEL, BS, TAB, HT, LF, NL, VT, FF, CR,
SO, SI, DLE, DC1, DC2, DC3, DC4, NAK, SYN, ETB, CAN, EM, SUB, ESC, FS,
GS, RS, US, SP, DEL.
\begin{tableii}{l|l}{constant}{Name}{Meaning}
\lineii{NUL}{}
\lineii{SOH}{Start of heading, console interrupt}
\lineii{STX}{Start of text}
\lineii{ETX}{Ennd of text}
\lineii{EOT}{End of transmission}
\lineii{ENQ}{Enquiry, goes with \constant{ACK} flow control}
\lineii{ACK}{Acknowledgement}
\lineii{BEL}{Bell}
\lineii{BS}{Backspace}
\lineii{TAB}{Tab}
\lineii{HT}{Alias for \constant{TAB}: ``Horizontal tab''}
\lineii{LF}{Line feed}
\lineii{NL}{Alias for \constant{LF}: ``New line''}
\lineii{VT}{Vertical tab}
\lineii{FF}{Form feed}
\lineii{CR}{Carriage return}
\lineii{SO}{Shift-out, begin alternate character set}
\lineii{SI}{Shift-in, resume default character set}
\lineii{DLE}{Data-link escape}
\lineii{DC1}{XON, for flow control}
\lineii{DC2}{Device control 2, block-mode flow control}
\lineii{DC3}{XOFF, for flow control}
\lineii{DC4}{Device control 4}
\lineii{NAK}{Negative acknowledgement}
\lineii{SYN}{Synchronous idle}
\lineii{ETB}{End transmission block}
\lineii{CAN}{Cancel}
\lineii{EM}{End of medium}
\lineii{SUB}{Substitute}
\lineii{ESC}{Escape}
\lineii{FS}{File separator}
\lineii{GS}{Group separator}
\lineii{RS}{Record separator, block-mode terminator}
\lineii{US}{Unit separator}
\lineii{SP}{Space}
\lineii{DEL}{Delete}
\end{tableii}
Note that many of these have little practical use in modern usage.
The module supplies the following functions, patterned on those in the
standard C library:
NL and LF are synonyms; so are HT and TAB. The module also supplies
the following functions, patterned on those in the standard C library:
\begin{funcdesc}{isalnum}{c}
Checks for an ASCII alphanumeric character; it is equivalent to
isalpha(c) or isdigit(c))
Checks for an \ASCII{} alphanumeric character; it is equivalent to
\samp{isalpha(\var{c}) or isdigit(\var{c})}.
\end{funcdesc}
\begin{funcdesc}{isalpha}{c}
Checks for an ASCII alphabetic character; it is equivalent to
isupper(c) or islower(c))
Checks for an \ASCII{} alphabetic character; it is equivalent to
\samp{isupper(\var{c}) or islower(\var{c})}.
\end{funcdesc}
\begin{funcdesc}{isascii}{c}
Checks for a character value that fits in the 7-bit ASCII set.
Checks for a character value that fits in the 7-bit \ASCII{} set.
\end{funcdesc}
\begin{funcdesc}{isblank}{c}
Checks for an ASCII alphanumeric character; it is equivalent to
isalpha(c) or isdigit(c))
Checks for an \ASCII{} whitespace character.
\end{funcdesc}
\begin{funcdesc}{iscntrl}{c}
Checks for an ASCII control character (range 0x00 to 0x1f).
Checks for an \ASCII{} control character (in the range 0x00 to 0x1f).
\end{funcdesc}
\begin{funcdesc}{isdigit}{c}
Checks for an ASCII decimal digit, 0 through 9.
Checks for an \ASCII{} decimal digit, \character{0} through
\character{9}. This is equivalent to \samp{\var{c} in string.digits}.
\end{funcdesc}
\begin{funcdesc}{isgraph}{c}
Checks for ASCII any printable character except space.
Checks for \ASCII{} any printable character except space.
\end{funcdesc}
\begin{funcdesc}{islower}{c}
Checks for an ASCII lower-case character.
Checks for an \ASCII{} lower-case character.
\end{funcdesc}
\begin{funcdesc}{isprint}{c}
Checks for any ASCII printable character including space.
Checks for any \ASCII{} printable character including space.
\end{funcdesc}
\begin{funcdesc}{ispunct}{c}
Checks for any printable ASCII character which is not a space or an
Checks for any printable \ASCII{} character which is not a space or an
alphanumeric character.
\end{funcdesc}
\begin{funcdesc}{isspace}{c}
Checks for ASCII white-space characters; space, tab, line feed,
Checks for \ASCII{} white-space characters; space, tab, line feed,
carriage return, form feed, horizontal tab, vertical tab.
\end{funcdesc}
\begin{funcdesc}{isupper}{c}
Checks for an ASCII uppercase letter.
Checks for an \ASCII{} uppercase letter.
\end{funcdesc}
\begin{funcdesc}{isxdigit}{c}
Checks for an ASCII hexadecimal digit, i.e. one of 0123456789abcdefABCDEF.
Checks for an \ASCII{} hexadecimal digit. This is equivalent to
\samp{\var{c} in string.hexdigits}.
\end{funcdesc}
\begin{funcdesc}{isctrl}{c}
Checks for an ASCII control character, bit values 0 to 31.
Checks for an \ASCII{} control character (ordinal values 0 to 31).
\end{funcdesc}
\begin{funcdesc}{ismeta}{c}
Checks for a (non-ASCII) character, bit values 0x80 and above.
Checks for a non-\ASCII{} character (ordinal values 0x80 and above).
\end{funcdesc}
These functions accept either integers or strings; when the argument
is a string, it is first converted using the built-in function ord().
is a string, it is first converted using the built-in function
\function{ord()}.
Note that all these functions check ordinal bit values derived from the
first character of the string you pass in; they do not actually know
anything about the host machine's character encoding. For functions
that know about the character encoding (and handle
internationalization properly) see the string module.
internationalization properly) see the \refmodule{string} module.
The following two functions take either a single-character string or
integer byte value; they return a value of the same type.
\begin{funcdesc}{ascii}{c}
Return the ASCII value corresponding to the low 7 bits of c.
Return the ASCII value corresponding to the low 7 bits of \var{c}.
\end{funcdesc}
\begin{funcdesc}{ctrl}{c}
Return the control character corresponding to the given character
(the character bit value is logical-anded with 0x1f).
(the character bit value is bitwise-anded with 0x1f).
\end{funcdesc}
\begin{funcdesc}{alt}{c}
Return the 8-bit character corresponding to the given ASCII character
(the character bit value is logical-ored with 0x80).
(the character bit value is bitwise-ored with 0x80).
\end{funcdesc}
The following function takes either a single-character string or
integer byte value; it returns a string.
integer value; it returns a string.
\begin{funcdesc}{unctrl}{c}
Return a string representation of the ASCII character c. If c is
printable, this string is the character itself. If the character
is a control character (0x00-0x1f) the string consists of a caret
(^) followed by the corresponding uppercase letter. If the character
is an ASCII delete (0x7f) the string is "^?". If the character has
its meta bit (0x80) set, the meta bit is stripped, the preceding rules
applied, and "!" prepended to the result.
Return a string representation of the \ASCII{} character \var{c}. If
\var{c} is printable, this string is the character itself. If the
character is a control character (0x00-0x1f) the string consists of a
caret (\character{\^}) followed by the corresponding uppercase letter.
If the character is an \ASCII{} delete (0x7f) the string is
\code{'\^{}?'}. If the character has its meta bit (0x80) set, the meta
bit is stripped, the preceding rules applied, and
\character{!} prepended to the result.
\end{funcdesc}
Finally, the module supplies a 33-element string array
called controlnames that contains the ASCII mnemonics for the
thirty-two ASCII control characters from 0 (NUL) to 0x1f (US),
in order, plus the mnemonic "SP" for space.
\begin{datadesc}{controlnames}
A 33-element string array that contains the \ASCII{} mnemonics for the
thirty-two \ASCII{} control characters from 0 (NUL) to 0x1f (US), in
order, plus the mnemonic \samp{SP} for the space character.
\end{datadesc}