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- "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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- <head>
- <meta name="generator" content="SciTE" />
- <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
- <title>
- Scintilla and SciTE Code Style Preferences
- </title>
- <style>
- .S0 {
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- font-size: 10pt;
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- </style>
- </head>
- <body bgcolor="#FFFFFF" text="#000000">
- <table bgcolor="#000000" width="100%" cellspacing="0" cellpadding="0" border="0">
- <tr>
- <td>
- <img src="SciTEIco.png" border="3" height="64" width="64" alt="Scintilla icon" />
- </td>
- <td>
- <a href="index.html" style="color:white;text-decoration:none"><font size="5">Scintilla
- and SciTE</font></a>
- </td>
- </tr>
- </table>
- <h2>
- Code Style
- </h2>
- <h3>
- Introduction
- </h3>
- <p>
- The source code of Scintilla and SciTE follow my preferences.
- Some of these decisions are arbitrary and based on my sense of aesthetics
- but its good to have all the code look the same even if its not exactly how
- everyone would prefer.
- </p>
- <p>
- Code that does not follow these conventions will be accepted, but will be modified
- as time goes by to fit the conventions. Scintilla code follows the conventions more
- closely than SciTE except for lexers which are relatively independent modules.
- Lexers that are maintained by others are left as they are submitted except that
- warnings will be fixed so the whole project can compile cleanly.
- </p>
- <p>
- The <a href="http://astyle.sourceforge.net/">AStyle</a> formatting
- program with a '-tapO' argument formats code in much the right way although
- there are a few bugs in AStyle. The scite/scripts/Fixer.py script will run AStyle
- over a C++ source file and fix up some of those bugs.
- </p>
- <h3>
- Language features
- </h3>
- <p>
- Design goals for Scintilla and SciTE include portability to currently available C++
- compilers on diverse platforms with high performance and low resource usage.
- Scintilla has stricter portability requirements to SciTE as it may be ported to
- low capability platforms such as Windows CE or PalmOS but it is less likely
- SciTE will be.
- </p>
- <p>
- To achieve portability, only a subset of C++ features are used. Exceptions are
- not available on some platforms such as Windows CE so exceptions are not used
- and thus the standard C++ library can not be used.
- Template support differs between compilers so is not used in Scintilla but there
- are some simple uses in SciTE.
- Run-time type information adds to memory use so is turned off.
- Name spaces are not used.
- </p>
- <p>
- The goto statement is not used because of bad memories from my first job
- maintaining FORTRAN programs. The union feature is not used as it can lead to
- non-type-safe value access.
- </p>
- <h3>
- Casting
- </h3>
- <p>
- Do not use old C style casts like (char *)s. Instead use the most strict form of C++
- cast possible like const_cast&lt;char *&gt;(s). Use static_cast and const_cast
- where possible rather than reinterpret_cast. Because the code is compiled with
- run-time type information turned off, dynamic_cast will not work.
- </p>
- <p>
- The benefit to using the new style casts is that they explicitly detail what evil is
- occurring and act as signals that something potentially unsafe is being done.
- </p>
- <p>
- Code that treats const seriously is easier to reason about both for humans
- and compilers, so use const parameters and avoid const_cast.
- </p>
- <h3>
- Warnings
- </h3>
- <p>
- To help ensure code is well written and portable, it is compiled with almost all
- warnings turned on. This sometimes results in warnings about code that is
- completely good (false positives) but changing the code to avoid the warnings
- is generally fast and has little impact on readability.
- </p>
- <p>
- Initialise all variables and minimise the scope of variables. If a variable is defined
- just before its use then it can't be misused by code before that point.
- Use loop declarations that are compatible with both the C++ standard and currently
- available compilers.
- </p>
- <h3>
- Allocation
- </h3>
- <p>
- As exceptions are not used, memory exhaustion can occur.
- This should be checked for and handled but there is quite a lot of Scintilla and
- SciTE code that doesn't yet.
- Fixed length buffers are often used as these are simple and avoid the need to
- worry about memory exhaustion but then require that buffer lengths are
- respected.
- </p>
- <p>
- The C++ new and delete operators are preferred over C's malloc and free
- as new and delete are type safe.
- </p>
- <h3>
- Bracketing
- </h3>
- <p>
- Start brackets, '{', should be located on the line of the control structure they
- start and end brackets, '}', should be at the indented start of a line. When there is
- an else clause, this occurs on the same line as the '}'.
- This format uses less lines than alternatives, allowing more code to be seen on screen.
- Fully bracketed control
- structures are preferred because this makes it more likely that modifications will
- be correct and it allows Scintilla's folder to work. No braces on returned
- expressions as return is a keyword, not a function call.
- </p>
-<SPAN class=S0></SPAN><SPAN class=S5>bool</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>fn</SPAN><SPAN class=S10>(</SPAN><SPAN class=S5>int</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>a</SPAN><SPAN class=S10>)</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S5>if</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>a</SPAN><SPAN class=S10>)</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>();</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>t</SPAN><SPAN class=S10>();</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S5>else</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>u</SPAN><SPAN class=S10>();</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S5>return</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>!</SPAN><SPAN class=S11>a</SPAN><SPAN class=S10>;</SPAN><SPAN class=S0><BR>
-</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0><BR>
-</SPAN> <h3>
- Spacing
- </h3>
- <p>
- Spaces on both sides of '=' and comparison operators and no attempt to line up '='.
- No space before or after '(', when used in calls, but a space after every ','.
- No spaces between tokens in short expressions but may be present in
- longer expressions. Space before '{'. No space before ';'.
- No space after '*' when used to mean pointer and no space after '[' or ']'.
- One space between keywords and '('.
- </p>
-<SPAN class=S0></SPAN><SPAN class=S5>void</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>StoreConditionally</SPAN><SPAN class=S10>(</SPAN><SPAN class=S5>int</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>c</SPAN><SPAN class=S10>,</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S5>const</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S5>char</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>*</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>)</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S5>if</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>c</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>&amp;&amp;</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>baseSegment</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>==</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>trustSegment</SPAN><SPAN class=S10>[</SPAN><SPAN class=S6>"html"</SPAN><SPAN class=S10>]))</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>baseSegment</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>=</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>+</SPAN><SPAN class=S4>1</SPAN><SPAN class=S10>;</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>Store</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>,</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>baseSegment</SPAN><SPAN class=S10>,</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S6>"html"</SPAN><SPAN class=S10>);</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0><BR>
-</SPAN><SPAN class=S10>}</SPAN>
- <h3>
- Names
- </h3>
- <p>
- Identifiers use mixed case and no underscores.
- Class, function and method names start with an uppercase letter and use
- further upper case letters to distinguish words. Variables start with a lower
- case letter and use upper case letters to distinguish words.
- Loop counters and similar variables can have simple names like 'i'.
- Function calls should be differentiated from method calls with an initial '::'
- global scope modifier.
- </p>
-<SPAN class=S0></SPAN><SPAN class=S5>class</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>StorageZone</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-</SPAN><SPAN class=S5>public</SPAN><SPAN class=S10>:</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S5>void</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>Store</SPAN><SPAN class=S10>(</SPAN><SPAN class=S5>const</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S5>char</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>*</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>)</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>Media</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>*</SPAN><SPAN class=S11>mediaStore</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>=</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>::</SPAN><SPAN class=S11>GetBaseMedia</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>zoneDefault</SPAN><SPAN class=S10>);</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S5>for</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>(</SPAN><SPAN class=S5>int</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>i</SPAN><SPAN class=S10>=</SPAN><SPAN class=S11>mediaStore</SPAN><SPAN class=S10>-&gt;</SPAN><SPAN class=S11>cursor</SPAN><SPAN class=S10>;</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>mediaStore</SPAN><SPAN class=S10>[</SPAN><SPAN class=S11>i</SPAN><SPAN class=S10>],</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S11>i</SPAN><SPAN class=S10>++)</SPAN><SPAN class=S0>&nbsp;</SPAN><SPAN class=S10>{</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S11>mediaStore</SPAN><SPAN class=S10>-&gt;</SPAN><SPAN class=S11>Persist</SPAN><SPAN class=S10>(</SPAN><SPAN class=S11>s</SPAN><SPAN class=S10>[</SPAN><SPAN class=S11>i</SPAN><SPAN class=S10>]);</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0><BR>
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN class=S10>}</SPAN><SPAN class=S0><BR>
-</SPAN><SPAN class=S10>};</SPAN>
- </body>
-</html>