📄 symfirst.htm
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<html><head><!- Copyright (c) Go Ahead Software Inc., 1995-2000. All Rights Reserved. -><title>symFirst -- basic</title><link rel="stylesheet" href="../../../style/doc.css" type="text/css"></head><body> <table width="550"> <tr><td><table border=0 width=100% cellspacing=0 cellpadding=0 CLASS="apiTitle"><tr> <td class="titleLeft" align=left width="33%"><b> symFirst</b></td><td class="titleCenter" align=center width="33%"><b> basic</b></td><td class="titleRight" align=right width="33%"><B> EMF</B></td></tr></table><hr><h2>Synopsis</h2><p>Finds the first value for a given symbol table.</p><h2>Prototype</h2><pre> #include "uemf.h" sym_t *<b>symFirst</b>(sym_fd_t sd);</pre><h2>Parameters</h2><table width=100% BORDER="0" CELLPADDING="0" CELLSPACING="0"> <tr> <td>sd</td><td>Handle to the table created from a previous call to <a href="symOpen.htm">symOpen</a>.</td></tr></table><h2>Description</h2><p> This module implements a highly efficient generic symbol table with update and access routines. Symbols are simple character strings, and the values they take can be flexible types as defined by <a href="value_t.htm">value_t</a>. This module allows multiple symbol tables to be created. </p><p> Return the first symbol in the hashtable if there is one. This call is used as the first step in traversing the table. A call to symFirst should be followed by calls to <a href="symNext.htm">symNext</a> to get the remaining entries. </p><h2>Return Value</h2><p> Returns a pointer to a sym_t structure which contains the value.NULL if not found.</p><h2>Example</h2><pre>sym_fd_t data;sym_t* elem;elem = symFirst(data);while (elem != NULL) { ejSetVar(0, elem->name.value.string, elem->content.value.string); elem = symNext(data);}</pre><h2>Stability Classification</h2><p>Evolving.</p><h2></h2><h2></h2><h2></h2><h2>See Also</h2><p><a href="symClose.htm">symClose</a>,<a href="symDelete.htm">symDelete</a>,<a href="symEnter.htm">symEnter</a>,<a href="symLookup.htm">symLookup</a>,<a href="symNext.htm">symNext</a>,<a href="symOpen.htm">symOpen</a></p></td></tr></table></body></html>⌨️ 快捷键说明
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