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<h1>Numeric: Rational Number Handling w/ Rounding Error Control<br>
<small>
[<a class="el" href="group__QOF.html">Query Object Framework</a>]</small>
</h1><hr><a name="_details"></a><h2>Detailed Description</h2>
The 'Numeric' functions provide a way of working with rational numbers while maintaining strict control over rounding errors when adding rationals with different denominators. The Numeric class is primarily used for working with monetary amounts, where the denominator typically represents the smallest fraction of the currency (e.g. pennies, centimes). The numeric class can handle any fraction (e.g. twelfth's) and is not limited to fractions that are powers of ten.<p>
Please refer to the GnuCash texinfo documentation for details on the numeric functions. (The texinfo will someday be brought inline, here, into this file).
<p>
<table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Files</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>file </td><td class="memItemRight" valign=bottom><a class="el" href="gnc-numeric_8h.html">gnc-numeric.h</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">An exact-rational-number library for gnucash. <br><br></td></tr>
<p>
<tr><td colspan=2><br><h2>Data Structures</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>struct </td><td class="memItemRight" valign=bottom><b>_gnc_numeric</b></td></tr>
<tr><td colspan=2><br><h2>Constructors</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga1">gnc_numeric_create</a> (gint64 num, gint64 denom)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga2">gnc_numeric_zero</a> (void)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga3">double_to_gnc_numeric</a> (double in, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>const gchar * </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga4">string_to_gnc_numeric</a> (const gchar *str, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *n)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga5">gnc_numeric_error</a> (int error_code)</td></tr>
<tr><td colspan=2><br><h2>Value accessors</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>gint64 </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga6">gnc_numeric_num</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>gint64 </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga7">gnc_numeric_denom</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>double </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga8">gnc_numeric_to_double</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> in)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>gchar * </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga9">gnc_numeric_to_string</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> n)</td></tr>
<tr><td colspan=2><br><h2>Tests</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga10">gnc_numeric_check</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga11">gnc_numeric_zero_p</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga12">gnc_numeric_compare</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga13" doxytag="Numeric::gnc_numeric_negative_p" ></a>
int </td><td class="memItemRight" valign=bottom><b>gnc_numeric_negative_p</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga14" doxytag="Numeric::gnc_numeric_positive_p" ></a>
int </td><td class="memItemRight" valign=bottom><b>gnc_numeric_positive_p</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga15">gnc_numeric_eq</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga16">gnc_numeric_equal</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>int </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga17">gnc_numeric_same</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how)</td></tr>
<tr><td colspan=2><br><h2>Arithmetic operations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga18" doxytag="Numeric::gnc_numeric_add" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_add</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga19" doxytag="Numeric::gnc_numeric_sub" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_sub</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga20" doxytag="Numeric::gnc_numeric_mul" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_mul</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga21" doxytag="Numeric::gnc_numeric_div" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_div</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga22">gnc_numeric_neg</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga23">gnc_numeric_abs</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga24">gnc_numeric_add_fixed</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga25">gnc_numeric_sub_fixed</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b)</td></tr>
<tr><td colspan=2><br><h2>Arithmetic functions with exact error returns</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga26" doxytag="Numeric::gnc_numeric_add_with_error" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_add_with_error</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *error)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga27" doxytag="Numeric::gnc_numeric_sub_with_error" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_sub_with_error</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *error)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga28" doxytag="Numeric::gnc_numeric_mul_with_error" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_mul_with_error</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *error)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga29" doxytag="Numeric::gnc_numeric_div_with_error" ></a>
<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><b>gnc_numeric_div_with_error</b> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> a, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> b, gint64 denom, gint how, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *error)</td></tr>
<tr><td colspan=2><br><h2>Change denominator</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga30">gnc_numeric_convert</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> in, gint64 denom, gint how)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga31">gnc_numeric_convert_with_error</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> in, gint64 denom, gint how, <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> *error)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga32">gnc_numeric_reduce</a> (<a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> in)</td></tr>
<tr><td colspan=2><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>#define </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga33">GNC_NUMERIC_RND_MASK</a> 0x0000000f</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga34" doxytag="Numeric::GNC_NUMERIC_DENOM_MASK" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_NUMERIC_DENOM_MASK</b> 0x000000f0</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga35" doxytag="Numeric::GNC_NUMERIC_SIGFIGS_MASK" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_NUMERIC_SIGFIGS_MASK</b> 0x0000ff00</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga36" doxytag="Numeric::GNC_DENOM_AUTO" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_DENOM_AUTO</b> 0</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga37" doxytag="Numeric::GNC_DENOM_RECIPROCAL" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_DENOM_RECIPROCAL</b>(a) (- ( a ))</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga38" doxytag="Numeric::GNC_DENOM_SIGFIGS" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_DENOM_SIGFIGS</b>(a) ( ((( a ) & 0xff) << 8) | GNC_DENOM_SIGFIG)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="anchor" name="ga39" doxytag="Numeric::GNC_NUMERIC_GET_SIGFIGS" ></a>
#define </td><td class="memItemRight" valign=bottom><b>GNC_NUMERIC_GET_SIGFIGS</b>(a) ( (( a ) & 0xff00 ) >> 8)</td></tr>
<tr><td colspan=2><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>typedef _gnc_numeric </td><td class="memItemRight" valign=bottom><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">An exact-number type. <a href="#ga0"></a><br><br></td></tr>
<tr><td colspan=2><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>enum </td><td class="memItemRight" valign=bottom>{ <br>
<b>GNC_RND_FLOOR</b> = 0x01,
<b>GNC_RND_CEIL</b> = 0x02,
<b>GNC_RND_TRUNC</b> = 0x03,
<b>GNC_RND_PROMOTE</b> = 0x04,
<br>
<b>GNC_RND_ROUND_HALF_DOWN</b> = 0x05,
<b>GNC_RND_ROUND_HALF_UP</b> = 0x06,
<b>GNC_RND_ROUND</b> = 0x07,
<b>GNC_RND_NEVER</b> = 0x08
<br>
}</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>enum </td><td class="memItemRight" valign=bottom>{ <br>
<b>GNC_DENOM_EXACT</b> = 0x10,
<b>GNC_DENOM_REDUCE</b> = 0x20,
<b>GNC_DENOM_LCD</b> = 0x30,
<b>GNC_DENOM_FIXED</b> = 0x40,
<br>
<b>GNC_DENOM_SIGFIG</b> = 0x50
<br>
}</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top>enum </td><td class="memItemRight" valign=bottom>{ <br>
<b>GNC_ERROR_OK</b> = 0,
<b>GNC_ERROR_ARG</b> = -1,
<b>GNC_ERROR_OVERFLOW</b> = -2,
<b>GNC_ERROR_DENOM_DIFF</b> = -3,
<br>
<b>GNC_ERROR_REMAINDER</b> = -4
<br>
}</td></tr>
</table>
<hr><h2>Define Documentation</h2>
<a class="anchor" name="ga33" doxytag="gnc-numeric.h::GNC_NUMERIC_RND_MASK" ></a><p>
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<td class="md" nowrap valign="top"> #define GNC_NUMERIC_RND_MASK 0x0000000f
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</td>
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<p>
bitmasks for HOW flags </td>
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<hr><h2>Typedef Documentation</h2>
<a class="anchor" name="ga0" doxytag="gnc-numeric.h::gnc_numeric" ></a><p>
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<td class="md" nowrap valign="top"> typedef struct _gnc_numeric <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a>
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</td>
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<p>
An exact-number type.
<p>
This is a rational number, defined by nominator and denominator. </td>
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<hr><h2>Enumeration Type Documentation</h2>
<a class="anchor" name="ga40" doxytag="gnc-numeric.h::@0" ></a><p>
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<td class="md" nowrap valign="top"> anonymous enum
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</td>
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<p>
rounding/truncation modes for operations </td>
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<a class="anchor" name="ga41" doxytag="gnc-numeric.h::@1" ></a><p>
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<td class="md" nowrap valign="top"> anonymous enum
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<p>
auto-denominator types </td>
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<a class="anchor" name="ga42" doxytag="gnc-numeric.h::@2" ></a><p>
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<td class="md" nowrap valign="top"> anonymous enum
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</td>
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errors </td>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="ga3" doxytag="gnc-numeric.h::double_to_gnc_numeric" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> double_to_gnc_numeric </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">double </td>
<td class="mdname" nowrap> <em>in</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint64 </td>
<td class="mdname" nowrap> <em>denom</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint </td>
<td class="mdname" nowrap> <em>how</em></td>
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<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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convert from floating-point values </td>
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<a class="anchor" name="ga23" doxytag="gnc-numeric.h::gnc_numeric_abs" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_abs </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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<p>
Return the absolute value of the argument </td>
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<a class="anchor" name="ga24" doxytag="gnc-numeric.h::gnc_numeric_add_fixed" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_add_fixed </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
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<td></td>
<td class="md">) </td>
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<p>
Shortcut for most common case: gnc_numeric_add(a, b, GNC_DENOM_AUTO, GNC_DENOM_FIXED | GNC_RND_NEVER); </td>
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<a class="anchor" name="ga10" doxytag="gnc-numeric.h::gnc_numeric_check" ></a><p>
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<td class="md" nowrap valign="top"> int gnc_numeric_check </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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<p>
Check for error signal in value. Returns GNC_ERROR_OK (==0) if there is no error, or any error code if there is one (e.g. GNC_ERROR_OVERFLOW) </td>
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<a class="anchor" name="ga12" doxytag="gnc-numeric.h::gnc_numeric_compare" ></a><p>
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<td class="md" nowrap valign="top"> int gnc_numeric_compare </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
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<td class="md">) </td>
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Returns 1 if a>b, -1 if b>a, 0 if a == b </td>
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<a class="anchor" name="ga30" doxytag="gnc-numeric.h::gnc_numeric_convert" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_convert </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>in</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint64 </td>
<td class="mdname" nowrap> <em>denom</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint </td>
<td class="mdname" nowrap> <em>how</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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<p>
change the denominator of a gnc_numeric value </td>
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<a class="anchor" name="ga31" doxytag="gnc-numeric.h::gnc_numeric_convert_with_error" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_convert_with_error </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>in</em>, </td>
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<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint64 </td>
<td class="mdname" nowrap> <em>denom</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint </td>
<td class="mdname" nowrap> <em>how</em>, </td>
</tr>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> * </td>
<td class="mdname" nowrap> <em>error</em></td>
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<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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</td>
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</td>
<td>
<p>
change the denominator of a gnc_numeric value </td>
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<a class="anchor" name="ga1" doxytag="gnc-numeric.h::gnc_numeric_create" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_create </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">gint64 </td>
<td class="mdname" nowrap> <em>num</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint64 </td>
<td class="mdname" nowrap> <em>denom</em></td>
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<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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</td>
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</td>
<td>
<p>
make a gnc_numeric from numerator and denominator </td>
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<a class="anchor" name="ga7" doxytag="gnc-numeric.h::gnc_numeric_denom" ></a><p>
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<td class="md" nowrap valign="top"> gint64 gnc_numeric_denom </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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<p>
Get parts </td>
</tr>
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<a class="anchor" name="ga15" doxytag="gnc-numeric.h::gnc_numeric_eq" ></a><p>
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<td class="md" nowrap valign="top"> int gnc_numeric_eq </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
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<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
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</td>
</tr>
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<td>
</td>
<td>
<p>
Equivalence predicate: Returns TRUE (1) if a and b are exactly the same (same numerator and denominator) </td>
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<a class="anchor" name="ga16" doxytag="gnc-numeric.h::gnc_numeric_equal" ></a><p>
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<td class="md" nowrap valign="top"> int gnc_numeric_equal </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
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</td>
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<table cellspacing=5 cellpadding=0 border=0>
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</td>
<td>
<p>
Equivalence predicate: Returns TRUE (1) if a and b represent exactly the same number (ratio of numerator to denominator is exactly equal) </td>
</tr>
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<a class="anchor" name="ga5" doxytag="gnc-numeric.h::gnc_numeric_error" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_error </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname1" valign="top" nowrap> <em>error_code</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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</td>
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</td>
<td>
<p>
make a special error-signalling gnc_numeric </td>
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<a class="anchor" name="ga22" doxytag="gnc-numeric.h::gnc_numeric_neg" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_neg </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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<p>
Negate the argument </td>
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<a class="anchor" name="ga6" doxytag="gnc-numeric.h::gnc_numeric_num" ></a><p>
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<td class="md" nowrap valign="top"> gint64 gnc_numeric_num </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
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</td>
</tr>
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<td>
</td>
<td>
<p>
Get parts </td>
</tr>
</table>
<a class="anchor" name="ga32" doxytag="gnc-numeric.h::gnc_numeric_reduce" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_reduce </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>in</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
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</td>
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<table cellspacing=5 cellpadding=0 border=0>
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<td>
</td>
<td>
<p>
reduce by GCF elimination </td>
</tr>
</table>
<a class="anchor" name="ga17" doxytag="gnc-numeric.h::gnc_numeric_same" ></a><p>
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<td class="md" nowrap valign="top"> int gnc_numeric_same </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint64 </td>
<td class="mdname" nowrap> <em>denom</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>gint </td>
<td class="mdname" nowrap> <em>how</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Equivalence predicate: Returns TRUE (1) if after both are converted to DENOM using method HOW, a and b are <a class="el" href="group__Numeric.html#ga7">gnc_numeric_equal()</a>. </td>
</tr>
</table>
<a class="anchor" name="ga25" doxytag="gnc-numeric.h::gnc_numeric_sub_fixed" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_sub_fixed </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>a</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname" nowrap> <em>b</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Shortcut for most common case: gnc_numeric_sub(a, b, GNC_DENOM_AUTO, GNC_DENOM_FIXED | GNC_RND_NEVER); </td>
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<td class="md" nowrap valign="top"> double gnc_numeric_to_double </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>in</em> </td>
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Convert to floating-point values </td>
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<td class="md" nowrap valign="top"> gchar* gnc_numeric_to_string </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>n</em> </td>
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Convert to string. The returned buffer is to be g_free'd by the caller (it was allocated through g_strdup) </td>
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<td class="md" nowrap valign="top"> <a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> gnc_numeric_zero </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void </td>
<td class="mdname1" valign="top" nowrap> </td>
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create a zero-value gnc_numeric </td>
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<td class="md" nowrap valign="top"> int gnc_numeric_zero_p </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> </td>
<td class="mdname1" valign="top" nowrap> <em>a</em> </td>
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Returns 1 if the given gnc_numeric is 0 (zeros), else returns 0. </td>
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<td class="md" nowrap valign="top"> const gchar* string_to_gnc_numeric </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const gchar * </td>
<td class="mdname" nowrap> <em>str</em>, </td>
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<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__Numeric.html#ga0">gnc_numeric</a> * </td>
<td class="mdname" nowrap> <em>n</em></td>
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<td></td>
<td class="md">) </td>
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<p>
Read a gnc_numeric from str, skipping any leading whitespace, and returning a pointer to just past the last byte read. Return NULL on error. </td>
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