130 lines
4.4 KiB
Plaintext
130 lines
4.4 KiB
Plaintext
= ASCII Character Reference
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Brent Saner <r00t@square-r00t.net>
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Last updated/rendered {localdatetime}
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:doctype: book
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:data-uri:
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:imagesdir: images
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:sectlinks:
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ifeval::["{doctype}" != "article"]
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:toc: preamble
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:toc2: left
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endif::[]
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:idprefix:
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:toclevels: 7
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:source-highlighter: highlightjs
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This document attempts to categorize and give reference
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for all ASCII codes and their various representations.
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I primarily used http://www.profdavis.net/ASCII_table.pdf[this PDF^] and
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http://www.robelle.com/smugbook/ascii.html[this website^] as references.
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== How to Use This Document
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=== How to Render It
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The document is written in https://asciidoc.org/[AsciiDoc^]
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(and rendered with https://asciidoctor.org/[AsciiDoctor^]).
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The most up-to-date AsciiDoc code can be found at
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https://git.square-r00t.net/OpTools/tree/ref/ascii[my OpTools repo^].
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You may see some things that don't quite match the AsciiDoc spec in the source;
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that's because they're probably AsciiDoctor-specific extensions.
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You can render it via `asciidoctor -n ascii.adoc`. By default it will render HTML5.
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You can also render to PDF via `asciidoctor-pdf -n ascii.adoc`.
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=== How to Read It
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Each section under <<reference_tables, Reference Tables>> has information about
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the following tables. Each table thereafter has the following columns in order:
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*DEC*:: The decimal representation of the character (i.e. what would be returned in Python's `ord()`).
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*OCT*:: The octal representation of the character.
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*HEX*:: The hexadecimal representation of the character.
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*BIN*:: The binary representation of the character.
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*HTML*:: The HTML number representation of the character.
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*ESCAPE*:: The HTML escape of the character (if it has one), e.g. `&quot;`.
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(Does not include the full set of https://dev.w3.org/html5/html-author/charref[HTML5 characters^],
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only characters that should be escaped.)
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*LIT*:: The literal character (if it is unprintable, its symbol name will be given instead in _italics_).
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*DESC*:: A description of the character.
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If any fields are not relevant, possible, defined, printable, etc. then they will be "N/A" (without the quotes).
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////
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TODO
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You will also find an <<index, Index>> to help you find a certain character more quickly, as well as reverse-lookup.
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In this index:
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* the literal character is in regular style
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* the decimal is a regular style positive integer
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* the octal is in *bold*
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* the hex is in _italics_
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* the HTML is in *_bold italics_*
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* the binary is in `fixed-width/monospace`
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* the HTML Escape (if it has one) is in `*bold fixed-width*`
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////
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== Reference Tables
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ASCII ("**A**merican **S**tandard **C**ode for **I**nformation **I**nterchange") is
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a series of 7-bit sequences in which each single bit represents a character.
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The tables given provide the information in 8 bits (256 characters total) per
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https://en.wikipedia.org/wiki/ISO/IEC_8859-1[ISO 8859-1^], commonly referred to
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as the `Latin-1` or `latin1` character set, in order to uniformly include the
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extended ASCII set.
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You may see some characters link to a https://en.wikipedia.org/[Wikipedia^] article in their description.
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This is typically done because the symbol/character is known by multiple different names or they're uncommon.
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You can, of course, copy the character directly from this page into your clipboard (if your OS supports it).
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=== ASCII Control Characters
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(DEC 0-31, OCT **000**-**037**, HEX __00__-__1f__)
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These characters represent control codes -- characters that alter the environment.
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They're primarily used these days for *nix (UNIX, BSD, GNU/Linux) terminals.
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Historically they have been used for things like line printers.
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You may see things in `fixed-width` in the description; these are
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https://en.wikipedia.org/wiki/Software_flow_control[flow controls^] (commonly
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used on e.g. RS-232).
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.Control Characters
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include::tables/_hdr.adoc[]
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include::tables/ctrl.adoc[]
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|===
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=== ASCII Printable Characters
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(DEC 32-127, OCT **040**-**177**, HEX __20__-__7f__)
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.Printable Characters
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include::tables/_hdr.adoc[]
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include::tables/print.adoc[]
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|===
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=== Extended ASCII Characters
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(DEC 128-255, OCT **200**-**377**, HEX __80__-__ff__)
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.Extended Characters
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include::tables/_hdr.adoc[]
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include::tables/extend.adoc[]
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|===
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=== Combined Table (All Characters/Codes)
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(DEC 0-255, OCT **000**-**377**, HEX __00__-__ff__)
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The following table is a combined table of the previous three sections for ease
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of reference.
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.All Characters
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include::tables/_hdr.adoc[]
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include::tables/ctrl.adoc[]
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include::tables/print.adoc[]
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include::tables/extend.adoc[]
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|===
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