晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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<title>pcre2_pattern_convert specification</title>
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<h1>pcre2_pattern_convert man page</h1>
<p>
Return to the <a href="index.html">PCRE2 index page</a>.
</p>
<p>
This page is part of the PCRE2 HTML documentation. It was generated
automatically from the original man page. If there is any nonsense in it,
please consult the man page, in case the conversion went wrong.
<br>
<br><b>
SYNOPSIS
</b><br>
<P>
<b>#include &#60;pcre2.h&#62;</b>
</P>
<P>
<b>int pcre2_pattern_convert(PCRE2_SPTR <i>pattern</i>, PCRE2_SIZE <i>length</i>,</b>
<b>  uint32_t <i>options</i>, PCRE2_UCHAR **<i>buffer</i>,</b>
<b>  PCRE2_SIZE *<i>blength</i>, pcre2_convert_context *<i>cvcontext</i>);</b>
</P>
<br><b>
DESCRIPTION
</b><br>
<P>
This function is part of an experimental set of pattern conversion functions.
It converts a foreign pattern (for example, a glob) into a PCRE2 regular
expression pattern. Its arguments are:
<pre>
  <i>pattern</i>     The foreign pattern
  <i>length</i>      The length of the input pattern or PCRE2_ZERO_TERMINATED
  <i>options</i>     Option bits
  <i>buffer</i>      Pointer to pointer to output buffer, or NULL
  <i>blength</i>     Pointer to output length field
  <i>cvcontext</i>   Pointer to a convert context or NULL
</pre>
The length of the converted pattern (excluding the terminating zero) is
returned via <i>blength</i>. If <i>buffer</i> is NULL, the function just returns
the output length. If <i>buffer</i> points to a NULL pointer, heap memory is
obtained for the converted pattern, using the allocator in the context if
present (or else <b>malloc()</b>), and the field pointed to by <i>buffer</i> is
updated. If <i>buffer</i> points to a non-NULL field, that must point to a
buffer whose size is in the variable pointed to by <i>blength</i>. This value is
updated.
</P>
<P>
The option bits are:
<pre>
  PCRE2_CONVERT_UTF                     Input is UTF
  PCRE2_CONVERT_NO_UTF_CHECK            Do not check UTF validity
  PCRE2_CONVERT_POSIX_BASIC             Convert POSIX basic pattern
  PCRE2_CONVERT_POSIX_EXTENDED          Convert POSIX extended pattern
  PCRE2_CONVERT_GLOB                    ) Convert
  PCRE2_CONVERT_GLOB_NO_WILD_SEPARATOR  )   various types
  PCRE2_CONVERT_GLOB_NO_STARSTAR        )     of glob
</pre>
The return value from <b>pcre2_pattern_convert()</b> is zero on success or a
non-zero PCRE2 error code.
</P>
<P>
The pattern conversion functions are described in the
<a href="pcre2convert.html"><b>pcre2convert</b></a>
documentation.
<p>
Return to the <a href="index.html">PCRE2 index page</a>.
</p>

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