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-<head>
-<title>atof(3) - Plan 9 from User Space</title>
-<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
-</head>
-<body bgcolor=#ffffff>
-<table border=0 cellpadding=0 cellspacing=0 width=100%>
-<tr height=10><td>
-<tr><td width=20><td>
-<tr><td width=20><td><b>ATOF(3)</b><td align=right><b>ATOF(3)</b>
-<tr><td width=20><td colspan=2>
- <br>
-<p><font size=+1><b>NAME </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- atof, atoi, atol, atoll, charstod, strtod, strtol, strtoll, strtoul,
- strtoull &ndash; convert text to numbers<br>
-
-</table>
-<p><font size=+1><b>SYNOPSIS </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- <tt><font size=+1>#include &lt;u.h&gt;<br>
- #include &lt;libc.h&gt;
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>double atof(char *nptr)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>int &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;atoi(char *nptr)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>long &nbsp;&nbsp;&nbsp;&nbsp;atol(char *nptr)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>vlong &nbsp;&nbsp;&nbsp;atoll(char *nptr)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>double charstod(int (*f)(void *), void *a)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>double strtod(char *nptr, char **rptr)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>long &nbsp;&nbsp;&nbsp;&nbsp;strtol(char *nptr, char **rptr, int base)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>vlong &nbsp;&nbsp;&nbsp;strtoll(char *nptr, char **rptr, int base)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>ulong &nbsp;&nbsp;&nbsp;strtoul(char *nptr, char **rptr, int base)<br>
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
- </font></tt>
- <tt><font size=+1>vlong &nbsp;&nbsp;&nbsp;strtoull(char *nptr, char **rptr, int base)<br>
- </font></tt>
-</table>
-<p><font size=+1><b>DESCRIPTION </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- <i>Atof</i>, <i>atoi</i>, <i>atol</i>, and <i>atoll</i> convert a string pointed to by <i>nptr</i>
- to floating, integer, long integer, and long long integer (<tt><font size=+1>vlong</font></tt>)
- representation respectively. The first unrecognized character
- ends the string. Leading C escapes are understood, as in <i>strtol</i>
- with <i>base</i> zero (described below).
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Atof</i> recognizes an optional string of tabs and spaces, then an
- optional sign, then a string of digits optionally containing a
- decimal point, then an optional <tt><font size=+1>e</font></tt> or <tt><font size=+1>E</font></tt> followed by an optionally
- signed integer.
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Atoi</i> and <i>atol</i> recognize an optional string of tabs and spaces,
- then an optional sign, then a string of decimal digits.
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Strtod</i>, <i>strtol</i>, <i>strtoll</i>, <i>strtoul</i>, and <i>strtoull</i> behave similarly
- to <i>atof</i> and <i>atol</i> and, if <i>rptr</i> is not zero, set <i>*rptr</i> to point
- to the input character immediately after the string converted.
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Strtol</i>, <i>strtoll</i>, <i>strtoul</i>, and <i>strtoull</i> interpret the digit string
- in the specified <i>base</i>, from 2 to 36, each digit being less than
- the base. Digits with value over 9 are represented by letters,
- a-z or A-Z. If <i>base</i> is 0, the input is interpreted as an integral
- constant in the style of C (with no suffixed type indicators):
- numbers are
- octal if they begin with <tt><font size=+1>0</font></tt>, hexadecimal if they begin with <tt><font size=+1>0x</font></tt>
- or <tt><font size=+1>0X</font></tt>, otherwise decimal.
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Charstod</i> interprets floating point numbers in the manner of <i>atof</i>,
- but gets successive characters by calling <tt><font size=+1>(*</font></tt><i>f</i><tt><font size=+1>)(a)</font></tt>. The last call
- to <i>f</i> terminates the scan, so it must have returned a character
- that is not a legal continuation of a number. Therefore, it may
- be necessary to back up the input stream one character after
- calling <i>charstod</i>.<br>
-
-</table>
-<p><font size=+1><b>SOURCE </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- <tt><font size=+1>/usr/local/plan9/src/lib9<br>
- </font></tt>
-</table>
-<p><font size=+1><b>SEE ALSO </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- <a href="../man3/fscanf.html"><i>fscanf</i>(3)</a><br>
-
-</table>
-<p><font size=+1><b>DIAGNOSTICS </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- Zero is returned if the beginning of the input string is not interpretable
- as a number; even in this case, <i>rptr</i> will be updated.<br>
- These routines set <i>errstr</i>.<br>
-
-</table>
-<p><font size=+1><b>BUGS </b></font><br>
-
-<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
-
- <i>Atoi</i> and <i>atol</i> accept octal and hexadecimal numbers in the style
- of C, contrary to the ANSI specification.
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- <i>Atof</i>, <i>strtod</i>, <i>strtol</i>, <i>strtoul</i>, <i>strtoll</i>, and <i>strtoull</i> are not provided:
- they are expected to be provided by the underlying system.
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- Because they are implemented in the fmt library, <i>charstod</i> and
- <i>strtod</i> are preprocessor macros defined as <i>fmtcharstod</i> and <i>fmtstrtod</i>.
-
- <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
-
- To avoid name conflicts with the underlying system, <i>atoi</i>, <i>atol</i>,
- and <i>atoll</i> are preprocessor macros defined as <i>p9atoi</i>, <i>p9atol</i>, and
- <i>p9atoll</i>; see <a href="../man3/intro.html"><i>intro</i>(3)</a>.<br>
-
-</table>
-
-<td width=20>
-<tr height=20><td>
-</table>
-<!-- TRAILER -->
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-<tr><td><td>
-<center>
-<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
-</center>
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