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Initial import of the CDE 2.1.30 sources from the Open Group.

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Peter Howkins
2012-03-10 18:21:40 +00:00
commit 83b6996daa
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cde/doc/C/guides/man/m3_tt/error.sgm Normal file
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<!-- $XConsortium: error.sgm /main/8 1996/09/08 20:12:09 rws $ -->
<!-- (c) Copyright 1996 Digital Equipment Corporation. -->
<!-- (c) Copyright 1996 Hewlett-Packard Company. -->
<!-- (c) Copyright 1996 International Business Machines Corp. -->
<!-- (c) Copyright 1996 Sun Microsystems, Inc. -->
<!-- (c) Copyright 1996 Novell, Inc. -->
<!-- (c) Copyright 1996 FUJITSU LIMITED. -->
<!-- (c) Copyright 1996 Hitachi. -->
<![ %CDE.C.CDE; [<RefEntry Id="CDE.TT.tterror">]]>
<![ %CDE.C.XO; [<RefEntry Id="XCSA.TT.tterror">]]>
<RefMeta>
<RefEntryTitle>tt_error</RefEntryTitle>
<ManVolNum>library call</ManVolNum>
</RefMeta>
<RefNameDiv>
<RefName><Function>tt_error</Function></RefName>
<RefPurpose>capture ToolTalk function errors
</RefPurpose>
</RefNameDiv>
<RefSynopsisDiv>
<FuncSynopsis>
<FuncSynopsisInfo>#include &lt;Tt/tt_c.h>
</FuncSynopsisInfo>
<FuncDef>void <Function>tt_error</Function></FuncDef>
<ParamDef>const char *<Parameter>funcname</Parameter></ParamDef>
<ParamDef>Tt_status <Parameter>status</Parameter></ParamDef>
</FuncSynopsis>
</RefSynopsisDiv>
<RefSect1>
<Title>DESCRIPTION</Title>
<Para>The
<Function>tt_error</function>
function is a publicly-known null function. It is called by
the ToolTalk library just before it returns from any ToolTalk API call
that has a status other than
<SystemItem Class="Constant">TT_OK</SystemItem>.
The caller passes the name of the function that
is about to return and the function's status code.
</Para>
<para>You can use this function to set a
<command>dbx</command> breakpoint to
quickly catch and trace back any ToolTalk errors.
You can also interpose this function, for example,
to log ToolTalk errors to <function>stderr</function>.
</para>
</RefSect1>
<RefSect1>
<Title>ARGUMENTS</Title>
<VariableList>
<VarListEntry>
<Term><symbol role="Variable">funcname</symbol></Term>
<ListItem>
<Para>Specifies the name of the function.
</Para>
</ListItem>
</VarListEntry>
<VarListEntry>
<Term><symbol role="Variable">status</symbol></Term>
<ListItem>
<Para>Specifies the function's return status value.
</Para>
</ListItem>
</VarListEntry>
</VariableList>
</RefSect1>
<RefSect1>
<Title>RETURN VALUE</Title>
<Para>None.</para>
</RefSect1>
<RefSect1>
<Title>APPLICATION USAGE</Title>
<Para>The following code example shows how an application might interpose this
function to log ToolTalk errors to <function>stderr</function>:
</para>
<programlisting>
void tt_error(const char *funcname, Tt_status status) {
fprintf(stderr, "ToolTalk function %s returned %s.\n",
funcname, tt_status_message(status));
}
</programlisting>
</RefSect1>
<RefSect1>
<Title>SEE ALSO</Title>
<Para>&cdeman.Tt.tt.c.h;
</para>
</RefSect1>
</RefEntry>