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<html><head><!- Copyright (c) Go Ahead Software Inc., 1995-2000. All Rights Reserved. -><title>value_t -- 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> value_t</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>Structure used to store all possible data types.</p><h2>Prototype</h2><pre> #include "uemf.h" typedef struct { union { char bool; char byteint; short shortint; char percent; long integer; long hex; long octal; long big[2]; double floating; char_t *string; char *bytes; char_t *errmsg; void *symbol; } value; value_type_t type; unsigned int valid; unsigned int allocated; /* String was balloced */} value_t;typedef enum { undefined = 0, byteint = 1, shortint = 2, integer = 3, hex = 4, percent = 5, octal = 6, big = 7, bool = 8, floating = 9, string = 10, bytes = 11, symbol = 12, errmsg = 13} value_type_t;</pre><h2>Description</h2><p> The value_t type is used heavily in the GoAhead EMF database API. </p><H2>Example</H2><PRE>/********************************************//* * Initialize a boolean value. */value_t valueBool(int value){ value_t v = VALUE_VALID; v.type = bool; v.value.bool = (char) value; return v;}</PRE><h2>Stability Classification</h2><p>Stable.</p><h2></h2><h2></h2><h2></h2><h2></h2><h2>See Also</h2><p><A HREF="valueFree.htm">valueFree</A></p></td></tr></table> </body></html>⌨️ 快捷键说明
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