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<HTML><HEAD><TITLE>Xlib Programming Manual: Quarks</TITLE></HEAD><BODY><H1 ALIGN=center>15.3 Quarks</H1>Most uses of the resource manager involve defining names,classes, and representation types as string constants.However, always referring to strings in the resource manager can be slow,because it is so heavily used in some toolkits.To solve this problem, a shorthand for a string is used in place of the stringin many of the resource manager functions.Simple comparisons can be performed rather than string comparisons.The shorthand name for a string is called a quark and is thetype <B>XrmQuark</B> .On some occasions,you may want to allocate a quark that has no string equivalent.<P>A quark is to a string what an atom is to a string in the server,but its use is entirely local to your application.<P>To allocate a new quark, use<B><A HREF="XrmUniqueQuark.html">XrmUniqueQuark()</A></B>.<P>Each name, class, and representation type is typedef'd as an<B>XrmQuark</B>.<A NAME="XrmQuark"></A><P><PRE><CODE>typedef int XrmQuark, *XrmQuarkList;typedef XrmQuark XrmName;typedef XrmQuark XrmClass;typedef XrmQuark XrmRepresentation;#define NULLQUARK ((XrmQuark) 0)</PRE></CODE><P>Lists are represented as null-terminated arrays of quarks.The size of the array must be large enough for the number of components used.<A NAME="XrmNameList"></A><P><PRE><CODE>typedef XrmQuarkList XrmNameList;typedef XrmQuarkList XrmClassList;</PRE></CODE><P>To convert a string to a quark, use<B><A HREF="XrmStringToQuark.html">XrmStringToQuark()</A></B>or<B><A HREF="XrmPermStringToQuark.html">XrmPermStringToQuark()</A></B>.<P>To convert a quark to a string, use <B><A HREF="XrmQuarkToString.html">XrmQuarkToString()</A></B>.<P>To convert a string with one or more components to a quark list, use<B><A HREF="XrmStringToQuarkList.html">XrmStringToQuarkList()</A></B>.<A NAME="XrmBindingList"></A><P>A binding list is a list of type<B>XrmBindingList</B>and indicates if components of name or class lists are bound tightly or loosely(that is, if wildcarding of intermediate components is specified).<P><PRE><CODE>typedef enum {XrmBindTightly, XrmBindLoosely} XrmBinding, *XrmBindingList;</PRE></CODE><P><B>XrmBindTightly</B>indicates that a period separates the components, and<B>XrmBindLoosely</B>indicates that an asterisk separates the components.<P>To convert a string with one or more components to a binding listand a quark list, use<B><A HREF="XrmStringToBindingQuarkList.html">XrmStringToBindingQuarkList()</A></B>.<H5 ALIGN=right><I>Next: <A HREF="creating-and-storing-databases.html">Creating and Storing Databases</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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