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<!doctype refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN" [
<!-- Process this file with docbook-to-man to generate an nroff manual
page: `docbook-to-man manpage.sgml > manpage.1'. You may view
the manual page with: `docbook-to-man manpage.sgml | nroff -man |
less'. A typical entry in a Makefile or Makefile.am is:
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docbook-to-man $< > $@
The docbook-to-man binary is found in the docbook-to-man package.
Please remember that if you create the nroff version in one of the
debian/rules file targets (such as build), you will need to include
docbook-to-man in your Build-Depends control field.
-->
<!-- Fill in your name for FIRSTNAME and SURNAME. -->
<!ENTITY dhfirstname "<firstname>UWE</firstname>">
<!ENTITY dhsurname "<surname>STEINMANN</surname>">
<!-- Please adjust the date whenever revising the manpage. -->
<!ENTITY dhdate "<date>March 24, 2006</date>">
<!-- SECTION should be 1-8, maybe w/ subsection other parameters are
allowed: see man(7), man(1). -->
<!ENTITY dhsection "<manvolnum>3</manvolnum>">
<!ENTITY dhemail "<email>uwe@steinmann.cx</email>">
<!ENTITY dhusername "Uwe Steinmann">
<!ENTITY dhucpackage "<refentrytitle>PX_RETRIEVE_RECORD</refentrytitle>">
<!ENTITY funcname "PX_retrieve_record">
<!ENTITY debian "<productname>Debian</productname>">
<!ENTITY gnu "<acronym>GNU</acronym>">
<!ENTITY gpl "&gnu; <acronym>GPL</acronym>">
]>
<refentry>
<refentryinfo>
<address>
&dhemail;
</address>
<author>
&dhfirstname;
&dhsurname;
</author>
<copyright>
<year>2003-2006</year>
<holder>&dhusername;</holder>
</copyright>
&dhdate;
</refentryinfo>
<refmeta>
&dhucpackage;
&dhsection;
</refmeta>
<refnamediv>
<refname>&funcname;</refname>
<refpurpose>Returns record in Paradox file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para>#include <paradox.h></para>
<para>pxval_t ** &funcname;(pxdoc_t *pxdoc, int recno)</para>
</refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para>Returns the record with the given number in a Paradox file. The
first record has number 0, the last one has number_of_records-1.</para>
<para>If you are accessing several records, do it in ascending order, because
this is the most efficient way.</para>
<para>The return value is an array of field values. Each value is stored in
a structure like the following:</para>
<programlisting>
<![CDATA[
typedef struct px_val pxval_t;
struct px_val {
char isnull;
int type;
union {
long lval;
double dval;
struct {
char *val;
int len;
} str;
} value;
};
]]>
</programlisting>
<para>The element <parameter>isnull</parameter> is set to 1 if the
value is NULL otherwise it is set to 0. <parameter>type</parameter>
is the type of the paradox field as defined in
<filename>paradox.h</filename>.
A field value can be either a long int, a double or a string, depending
on the paradox field type. The paradox field types pxfShort, pxfLong,
pxfDate, pxfTime, pxfLogical, and pxfAutoInc are returned as long int
values.
pxfTimestamp, pxfNumber, and pxfCurrency are returned as double values
and all remaining paradox field types are stored as strings with the length
in <literal>value.len</literal>. You can rely on strings being Null
terminated. Blobs are stored as string but are not guarented to be
Null terminated.</para>
<para>The paradox field types pxfTimestamp, pxfTime, an pxfDate use an
uncommon format which can be converted into a string with
<function>PX_timestamp2string(3)</function>,
<function>PX_time2string(3)</function>, and
<function>PX_date2string(3)</function>.</para>
</refsect1>
<refsect1>
<title>RETURN VALUE</title>
<para>Returns a pointer on success and NULL on failure.</para>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para>
<function>PX_update_record(3)</function>,
<function>PX_timestamp2string(3)</function>,
<function>PX_time2string(3)</function>,
<function>PX_date2string(3)</function>
</para>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para>This manual page was written by &dhusername; &dhemail;.</para>
</refsect1>
</refentry>
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|
