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<p>
Previous: <a href="Memory-allocation.html#Memory-allocation" accesskey="p" rel="prev">Memory allocation</a>, Up: <a href="Customization.html#Customization" accesskey="u" rel="up">Customization</a> [<a href="Parameter-index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-index.html#Concept-index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="The-Style-file"></a>
<h3 class="section">12.3 The Style file</h3>
<a name="index-Style-file"></a>
<a name="index-File_002c-style"></a>
<a name="index-fweb_002esty-1"></a>
<p>A <em>style file</em> (default name <samp>fweb.sty</samp>) may reside in the
user’s current directory (or the directory specified by the environment
variable <code>FWEB_STYLE_DIR</code>). The default name can be changed by the
command-line option ‘<samp>-z</samp>’ (see <a href="_002dz.html#g_t_002dz">-z</a>).
</p>
<p>The style file is processed after all command-line options have been
processed, except that the command-line option ‘<samp>-p</samp>’ (see <a href="_002dp.html#g_t_002dp">-p</a>)
gets special treatment. Note that that option buffers up style-file
entries (i.e., one may use more than one ‘<samp>-p</samp>’ option). ‘<samp>-p</samp>’
options placed in <samp>.fweb</samp> are treated as residing in a temporary
file that is read just <em>before</em> the local style file; thus, those behave
as ‘global’ style-file entries that will be overridden by a matching
entry in the local style file. ‘<samp>-p</samp>’ options on the command line
will be processed <em>after</em> the local style file, thus override
corresponding options in either <samp>.fweb</samp> or the local style file.
</p>
<p>To summarize the previous discussion, the local style file is intended
to contain settings that are common to a particular source file.
Settings common to all source files can be put into <samp>.fweb</samp> by
means of the ‘<samp>-p</samp>’ option. To override a setting for a single run,
use a ‘<samp>-p</samp>’ option on the command line.
</p>
<p>Style-file entries have the form
</p>
<div class="example">
<pre class="example"> <var>keyword</var> <i>[</i>=<i>]</i> <var>value</var>
</pre></div>
<p>The equals sign is always optional. The ‘<samp>value</samp>’ is usually a
double-quoted string, but may sometimes be an integer or a single-quoted
character. For example,
</p>
<div class="example">
<pre class="example"> LaTeX.class.options = "twoside"
LaTeX.package "indentfirst,multicol"
mark_defined.fcn_name 0
line_char.N 'C'
color.error = "red"
Color.red = "\e[01;31m"
</pre></div>
<p>The syntax is completely free-form. Periods within keywords are
precisely equivalent to underscores, but are useful heuristically for
associating a structure-like hierarchy to some of the commands.
Non-printable characters in strings can be specified as octal constants
(e.g., ‘<samp>\033</samp>’), hexadecimal constants (e.g., ‘<samp>\x1B</samp>’), or one
of the ANSI escape sequences ‘<samp>\a</samp>’, ‘<samp>\b</samp>’, ‘<samp>\f</samp>’, ‘<samp>\n</samp>’,
‘<samp>\r</samp>’, ‘<samp>\t</samp>’, and ‘<samp>\v</samp>’. The non-ANSI escape sequence
‘<samp>\e</samp>’ (escape) is also supported; that is particularly useful for
color processing (see <a href="Color.html#Color">Color</a>).
</p>
<p>Various of the style-file parameters take a language subscript. Those
are
</p>
<blockquote>
<dl compact="compact">
<dt><code>C</code></dt>
<dd><p>C
</p></dd>
<dt><code>Cpp</code></dt>
<dd><p>C++
</p></dd>
<dt><code>N</code></dt>
<dd><p><small>FORTRAN</small>-77
</p></dd>
<dt><code>N90</code></dt>
<dd><p><small>FORTRAN</small>-90
</p></dd>
<dt><code>R</code></dt>
<dd><p><small>RATFOR</small>-77
</p></dd>
<dt><code>R90</code></dt>
<dd><p><small>RATFOR</small>-90
</p></dd>
<dt><code>V</code></dt>
<dd><p>Verbatim
</p></dd>
<dt><code>X</code></dt>
<dd><p>TeX
</p>
</dd>
</dl>
</blockquote>
<p>Thus, <code>line_char.N</code> is the comment character for <small>FTANGLE</small>’s
<code>line</code> commands (see <a href="line_005fchar.html#line_005fchar">line_char</a>), for <small>FORTRAN</small>-77 code.
</p>
<p>Unfortunately, the descriptions of the parameters aren’t all completed
yet. To query the default values, say ‘<samp>ftangle -Z</samp>’ (see <a href="_002dZ_005f.html#g_t_002dZ_005f">-Z_</a>).
</p>
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<tr><td align="left" valign="top">• <a href="Index-params.html#Index-params" accesskey="1">Index params</a>:</td><td> </td><td align="left" valign="top">Customizing the Index.
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<tr><td align="left" valign="top">• <a href="Module-params.html#Module-params" accesskey="2">Module params</a>:</td><td> </td><td align="left" valign="top">Customizing the list of sections.
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<tr><td align="left" valign="top">• <a href="Contents-params.html#Contents-params" accesskey="3">Contents params</a>:</td><td> </td><td align="left" valign="top">Customizing the Table of Contents.
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<tr><td align="left" valign="top">• <a href="Subscript-params.html#Subscript-params" accesskey="4">Subscript params</a>:</td><td> </td><td align="left" valign="top">Customizing subscripting for cross-references.
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<tr><td align="left" valign="top">• <a href="Fwebmac-params.html#Fwebmac-params" accesskey="5">Fwebmac params</a>:</td><td> </td><td align="left" valign="top">Customizing behavior of <small>FWEB</small>’s macros.
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<tr><td align="left" valign="top">• <a href="Completion-params.html#Completion-params" accesskey="6">Completion params</a>:</td><td> </td><td align="left" valign="top">Automatic selection of file extensions, etc.
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<tr><td align="left" valign="top">• <a href="Control_002dcode-mappings.html#Control_002dcode-mappings" accesskey="7">Control-code mappings</a>:</td><td> </td><td align="left" valign="top">Remapping <small>FWEB</small>’s control codes (danger)!
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<tr><td align="left" valign="top">• <a href="Color.html#Color" accesskey="8">Color</a>:</td><td> </td><td align="left" valign="top"><small>FWEB</small>’s color output.
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<tr><td align="left" valign="top">• <a href="Miscellaneous-params.html#Miscellaneous-params" accesskey="9">Miscellaneous params</a>:</td><td> </td><td align="left" valign="top">Other customizations.
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