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<HTML><HEAD><TITLE>Xlib Programming Manual: Parsing Command Line Options</TITLE></HEAD><BODY><H1 ALIGN=center>15.9 Parsing Command Line Options</H1>The<B><A HREF="XrmParseCommand.html">XrmParseCommand()</A></B>function can be used to parse the command line arguments to a programand modify a resource database with selected entries from the command line.<A NAME="XrmOptionKind"></A><P><!.IN "XrmOptionKind" "" "@DEF@"><PRE><CODE>typedef enum { XrmoptionNoArg, /* Value is specified in XrmOptionDescRec.value */ XrmoptionIsArg, /* Value is the option string itself */ XrmoptionStickyArg, /* Value is characters immediately following option */ XrmoptionSepArg, /* Value is next argument in argv */ XrmoptionResArg, /* Resource and value in next argument in argv */ XrmoptionSkipArg, /* Ignore this option and the next argument in argv */ XrmoptionSkipLine, /* Ignore this option and the rest of argv */ XrmoptionSkipNArgs /* Ignore this option and the next XrmOptionDescRec.value arguments in argv */} XrmOptionKind;</PRE></CODE><P>Note that<B>XrmoptionSkipArg</B>is equivalent to <B>XrmoptionSkipNArgs</B>with the<B>XrmOptionDescRec.value</B>field containing the value one.Note also that the value zero for<B>XrmoptionSkipNArgs</B>indicates that only the option itself is to be skipped.<A NAME="XrmOptionDescRec"></A><P><!.IN "XrmOptionDescRec" "" "@DEF@"><PRE><CODE>typedef struct { char *option; /* Option specification string in argv */ char *specifier; /* Binding and resource name (sans application name) */ XrmOptionKind argKind; /* Which style of option it is */ XPointer value; /* Value to provide if XrmoptionNoArg or XrmoptionSkipNArgs */} XrmOptionDescRec, *XrmOptionDescList;</PRE></CODE><P>To load a resource database from a C command line, use<B><A HREF="XrmParseCommand.html">XrmParseCommand()</A></B>.<H5 ALIGN=right><I>Next Chapter: <A HREF="../utilities/">Application Utility Functions</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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