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<div class="title">std::basic_filebuf< _CharT, _Traits > Class Template Reference<div class="ingroups"><a class="el" href="a01635.html">I/O</a></div></div> </div>
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Inheritance diagram for std::basic_filebuf< _CharT, _Traits >:</div>
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<div class="center"><img src="a02734.png" border="0" usemap="#std_1_1basic__filebuf_3_01___char_t_00_01___traits_01_4_inherit__map" alt="Inheritance graph"/></div>
<map name="std_1_1basic__filebuf_3_01___char_t_00_01___traits_01_4_inherit__map" id="std_1_1basic__filebuf_3_01___char_t_00_01___traits_01_4_inherit__map">
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Public Types</h2></td></tr>
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typedef <a class="el" href="a00614.html">codecvt</a>< char_type, <br class="typebreak"/>
char, __state_type > </td><td class="memItemRight" valign="bottom"><b>__codecvt_type</b></td></tr>
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typedef __basic_file< char > </td><td class="memItemRight" valign="bottom"><b>__file_type</b></td></tr>
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<tr class="memitem:ab5281d5f5dd4f754b0ad5790a7fb7b46"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab5281d5f5dd4f754b0ad5790a7fb7b46"></a>
typedef <a class="el" href="a00428.html">basic_filebuf</a><br class="typebreak"/>
< char_type, traits_type > </td><td class="memItemRight" valign="bottom"><b>__filebuf_type</b></td></tr>
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<tr class="memitem:acb5979772aa84ac0d431841d3d28ccf2"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acb5979772aa84ac0d431841d3d28ccf2"></a>
typedef traits_type::state_type </td><td class="memItemRight" valign="bottom"><b>__state_type</b></td></tr>
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typedef <a class="el" href="a00433.html">basic_streambuf</a><br class="typebreak"/>
< char_type, traits_type > </td><td class="memItemRight" valign="bottom"><b>__streambuf_type</b></td></tr>
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typedef _CharT </td><td class="memItemRight" valign="bottom"><b>char_type</b></td></tr>
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typedef traits_type::int_type </td><td class="memItemRight" valign="bottom"><b>int_type</b></td></tr>
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typedef traits_type::off_type </td><td class="memItemRight" valign="bottom"><b>off_type</b></td></tr>
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typedef traits_type::pos_type </td><td class="memItemRight" valign="bottom"><b>pos_type</b></td></tr>
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typedef _Traits </td><td class="memItemRight" valign="bottom"><b>traits_type</b></td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:add2d16a8965c490cd9b4cc95b958e09f"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#add2d16a8965c490cd9b4cc95b958e09f">basic_filebuf</a> ()</td></tr>
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<tr class="memitem:a226a8efc1add60c0fc04ce2714a56b4c"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a226a8efc1add60c0fc04ce2714a56b4c">~basic_filebuf</a> ()</td></tr>
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<tr class="memitem:a5e13a128abb0a5dd8ef1e3d10597031f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00428.html">__filebuf_type</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a5e13a128abb0a5dd8ef1e3d10597031f">close</a> ()</td></tr>
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<tr class="memitem:a924a684fe2a6844d766e25f4051b705c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a924a684fe2a6844d766e25f4051b705c">in_avail</a> ()</td></tr>
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<tr class="memitem:aa68144da7ed8779bc0f50af4536cf9bc"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#aa68144da7ed8779bc0f50af4536cf9bc">is_open</a> () const throw ()</td></tr>
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<tr class="memitem:ad72dc61561f4420b36f9e626b4426433"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00428.html">__filebuf_type</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#ad72dc61561f4420b36f9e626b4426433">open</a> (const char *__s, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode)</td></tr>
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<tr class="memitem:a541062313b01b7bb74af2582f88a365f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00428.html">__filebuf_type</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a541062313b01b7bb74af2582f88a365f">open</a> (const <a class="el" href="a00434.html">std::string</a> &__s, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode)</td></tr>
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<tr class="memitem:a72d8037e21ad370e3643ff3c865f91f9"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a72d8037e21ad370e3643ff3c865f91f9">sbumpc</a> ()</td></tr>
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<tr class="memitem:ac773fb2c87cf938fb6eb89c987f8e04e"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#ac773fb2c87cf938fb6eb89c987f8e04e">sgetc</a> ()</td></tr>
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<tr class="memitem:a7cfb11ce1eb1a31cf82d7a876c35351b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a7cfb11ce1eb1a31cf82d7a876c35351b">sgetn</a> (char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
<tr class="separator:a7cfb11ce1eb1a31cf82d7a876c35351b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6d281db46069df3043b566f10e5397b2"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a6d281db46069df3043b566f10e5397b2">snextc</a> ()</td></tr>
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<tr class="memitem:ae77ef8a76529317abdc2e6a66336e3ec"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#ae77ef8a76529317abdc2e6a66336e3ec">sputbackc</a> (char_type __c)</td></tr>
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<tr class="memitem:af3504dac5b4cd940dbce97ddc5ed0c25"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#af3504dac5b4cd940dbce97ddc5ed0c25">sputc</a> (char_type __c)</td></tr>
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<tr class="memitem:a5d2917460a0283e7e2ff51940704ca95"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a5d2917460a0283e7e2ff51940704ca95">sputn</a> (const char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
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<tr class="memitem:a8d42bd5b22d246f15a8dd0a8614c0e3f"><td class="memItemLeft" align="right" valign="top">int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a8d42bd5b22d246f15a8dd0a8614c0e3f">sungetc</a> ()</td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-methods"></a>
Protected Member Functions</h2></td></tr>
<tr class="memitem:a08e47bff97f75d3e8ac1030a749d8050"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a08e47bff97f75d3e8ac1030a749d8050"></a>
void </td><td class="memItemRight" valign="bottom"><b>__safe_gbump</b> (<a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
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<tr class="memitem:acf38c5ab3e2b5b2bf91ad67f255e45bf"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acf38c5ab3e2b5b2bf91ad67f255e45bf"></a>
void </td><td class="memItemRight" valign="bottom"><b>__safe_pbump</b> (<a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
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<tr class="memitem:aea6d30b55e034ceb9a3b7d9e871dd10e"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aea6d30b55e034ceb9a3b7d9e871dd10e"></a>
void </td><td class="memItemRight" valign="bottom"><b>_M_allocate_internal_buffer</b> ()</td></tr>
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<tr class="memitem:a665919c7fe3cbdda51e5d45791b82bc3"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a665919c7fe3cbdda51e5d45791b82bc3"></a>
bool </td><td class="memItemRight" valign="bottom"><b>_M_convert_to_external</b> (char_type *, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a>)</td></tr>
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<tr class="memitem:ac4c7480aea8087a568d10b87a06b4d4e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#ac4c7480aea8087a568d10b87a06b4d4e">_M_create_pback</a> ()</td></tr>
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<tr class="memitem:a88c6c60e423cf9c38973edf6aec6538d"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a88c6c60e423cf9c38973edf6aec6538d"></a>
void </td><td class="memItemRight" valign="bottom"><b>_M_destroy_internal_buffer</b> () throw ()</td></tr>
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<tr class="memitem:a7b95d650e7a161b18ca9fcbd3f792253"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a7b95d650e7a161b18ca9fcbd3f792253">_M_destroy_pback</a> () throw ()</td></tr>
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int </td><td class="memItemRight" valign="bottom"><b>_M_get_ext_pos</b> (__state_type &__state)</td></tr>
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pos_type </td><td class="memItemRight" valign="bottom"><b>_M_seek</b> (off_type __off, <a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a">ios_base::seekdir</a> __way, __state_type __state)</td></tr>
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<tr class="memitem:af3d033b08f1641d4594fb5d21eb2db89"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#af3d033b08f1641d4594fb5d21eb2db89">_M_set_buffer</a> (<a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __off)</td></tr>
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<tr class="memitem:af3c4f9aafa661a50601fab2cb669cf8b"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af3c4f9aafa661a50601fab2cb669cf8b"></a>
bool </td><td class="memItemRight" valign="bottom"><b>_M_terminate_output</b> ()</td></tr>
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<tr class="memitem:a9d130ff289d2617954156378a79dbdc0"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a9d130ff289d2617954156378a79dbdc0">gbump</a> (int __n)</td></tr>
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<tr class="memitem:a4e8214d23c9895a180231de6cf463449"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a4e8214d23c9895a180231de6cf463449">imbue</a> (const <a class="el" href="a00800.html">locale</a> &__loc)</td></tr>
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<tr class="memitem:ac1941000c0d1480052cc8ee84fd8a665"><td class="memItemLeft" align="right" valign="top">virtual int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#ac1941000c0d1480052cc8ee84fd8a665">overflow</a> (int_type __c=_Traits::eof())</td></tr>
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<tr class="memitem:a98e6cafd6256f907c4fff74afa49be3e"><td class="memItemLeft" align="right" valign="top">virtual int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a98e6cafd6256f907c4fff74afa49be3e">pbackfail</a> (int_type __c=_Traits::eof())</td></tr>
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<tr class="memitem:abd017296cfc054910ca7de102e6a6998"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#abd017296cfc054910ca7de102e6a6998">pbump</a> (int __n)</td></tr>
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<tr class="memitem:a0152beebcac8c9542b6b0efe3de5bbfb"><td class="memItemLeft" align="right" valign="top">virtual pos_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a0152beebcac8c9542b6b0efe3de5bbfb">seekoff</a> (off_type __off, <a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a">ios_base::seekdir</a> __way, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode=<a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a>|<a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a>)</td></tr>
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<tr class="memitem:a91365d684bb298cb7ad42e3c73cd0252"><td class="memItemLeft" align="right" valign="top">virtual pos_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a91365d684bb298cb7ad42e3c73cd0252">seekpos</a> (pos_type __pos, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode=<a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a>|<a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a>)</td></tr>
<tr class="separator:a91365d684bb298cb7ad42e3c73cd0252"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afdc468aedafb80e43f14569d09485e6b"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="a00433.html">__streambuf_type</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#afdc468aedafb80e43f14569d09485e6b">setbuf</a> (char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
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<tr class="memitem:a38c9b562c20b30bf9d21cf0e4dc90356"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a38c9b562c20b30bf9d21cf0e4dc90356">setg</a> (char_type *__gbeg, char_type *__gnext, char_type *__gend)</td></tr>
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<tr class="memitem:ab0f1b49870f87d288a737cd9f8f9ec00"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#ab0f1b49870f87d288a737cd9f8f9ec00">setp</a> (char_type *__pbeg, char_type *__pend)</td></tr>
<tr class="separator:ab0f1b49870f87d288a737cd9f8f9ec00"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0e8e4218ba9766e34b74e69b17fb28b3"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a0e8e4218ba9766e34b74e69b17fb28b3">showmanyc</a> ()</td></tr>
<tr class="separator:a0e8e4218ba9766e34b74e69b17fb28b3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af42cd30ec66c6eb0df56026098b6e04f"><td class="memItemLeft" align="right" valign="top">virtual int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#af42cd30ec66c6eb0df56026098b6e04f">sync</a> ()</td></tr>
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<tr class="memitem:a4e0c932f41122eaec83e7008ece5e207"><td class="memItemLeft" align="right" valign="top">virtual int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a4e0c932f41122eaec83e7008ece5e207">uflow</a> ()</td></tr>
<tr class="separator:a4e0c932f41122eaec83e7008ece5e207"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a051ec9d0aa68d3bbf3a2b8cb2e41c93b"><td class="memItemLeft" align="right" valign="top">virtual int_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a051ec9d0aa68d3bbf3a2b8cb2e41c93b">underflow</a> ()</td></tr>
<tr class="separator:a051ec9d0aa68d3bbf3a2b8cb2e41c93b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4fb6d662a8351a9c790be9fbe78be8b4"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a4fb6d662a8351a9c790be9fbe78be8b4">xsgetn</a> (char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
<tr class="separator:a4fb6d662a8351a9c790be9fbe78be8b4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9e78a1d5dec2c7eea816ada4e43d7576"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a9e78a1d5dec2c7eea816ada4e43d7576">xsputn</a> (const char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
<tr class="separator:a9e78a1d5dec2c7eea816ada4e43d7576"><td class="memSeparator" colspan="2"> </td></tr>
<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr class="memitem:a8a98bb10a958b9f1ad62e5444ff614ba"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba">eback</a> () const </td></tr>
<tr class="separator:a8a98bb10a958b9f1ad62e5444ff614ba"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad631f06db33ec1d3888302ec244a6ae9"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9">gptr</a> () const </td></tr>
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<tr class="memitem:a271d085f48ab53194825e04e7caab94c"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c">egptr</a> () const </td></tr>
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<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr class="memitem:a3ea4ba600f85337465d093a30519ad91"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a3ea4ba600f85337465d093a30519ad91">pbase</a> () const </td></tr>
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<tr class="memitem:a40fb7ed23cd6414206fc5616ab651275"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275">pptr</a> () const </td></tr>
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<tr class="memitem:a74a6d83368391e53d884e714c65e43e5"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a74a6d83368391e53d884e714c65e43e5">epptr</a> () const </td></tr>
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</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pro-attribs"></a>
Protected Attributes</h2></td></tr>
<tr class="memitem:a981a6d9fa6672d57f94dc2578f3d4b07"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a981a6d9fa6672d57f94dc2578f3d4b07">_M_buf</a></td></tr>
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<tr class="memitem:a98dee66e2205f6c0a46e2c34c716aff5"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a98dee66e2205f6c0a46e2c34c716aff5"></a>
bool </td><td class="memItemRight" valign="bottom"><b>_M_buf_allocated</b></td></tr>
<tr class="separator:a98dee66e2205f6c0a46e2c34c716aff5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a59de9f582ce410ea2c7583eaf4228e2f"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a59de9f582ce410ea2c7583eaf4228e2f">_M_buf_size</a></td></tr>
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<tr class="memitem:a76b9823141057e699e88f052d76fba5b"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a76b9823141057e699e88f052d76fba5b"></a>
const <a class="el" href="a00614.html">__codecvt_type</a> * </td><td class="memItemRight" valign="bottom"><b>_M_codecvt</b></td></tr>
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<tr class="memitem:a65f15e25bc11ffc20ca24e1c437ee5c0"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a65f15e25bc11ffc20ca24e1c437ee5c0">_M_ext_buf</a></td></tr>
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<tr class="memitem:a284d196740028e4047586fe923e7a595"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a284d196740028e4047586fe923e7a595">_M_ext_buf_size</a></td></tr>
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<tr class="memitem:ab83d1b06739d7973b4f3e81a853f8973"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab83d1b06739d7973b4f3e81a853f8973"></a>
char * </td><td class="memItemRight" valign="bottom"><b>_M_ext_end</b></td></tr>
<tr class="separator:ab83d1b06739d7973b4f3e81a853f8973"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af4a3bae8038d32dffd03676c93feccbc"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#af4a3bae8038d32dffd03676c93feccbc">_M_ext_next</a></td></tr>
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<tr class="memitem:a167ce741492c67649e53647ab79a21ab"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a167ce741492c67649e53647ab79a21ab"></a>
__file_type </td><td class="memItemRight" valign="bottom"><b>_M_file</b></td></tr>
<tr class="separator:a167ce741492c67649e53647ab79a21ab"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a29ce35db82d183016eae352d5b42814b"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a29ce35db82d183016eae352d5b42814b"></a>
__c_lock </td><td class="memItemRight" valign="bottom"><b>_M_lock</b></td></tr>
<tr class="separator:a29ce35db82d183016eae352d5b42814b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a14cdd23152cee458aaa655cf9508f9a6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a14cdd23152cee458aaa655cf9508f9a6">_M_mode</a></td></tr>
<tr class="separator:a14cdd23152cee458aaa655cf9508f9a6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:acde765e7a5ddaca79683176fe981cec1"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#acde765e7a5ddaca79683176fe981cec1">_M_reading</a></td></tr>
<tr class="separator:acde765e7a5ddaca79683176fe981cec1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac90a70f498cd4008f5550c9327bb3511"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ac90a70f498cd4008f5550c9327bb3511"></a>
__state_type </td><td class="memItemRight" valign="bottom"><b>_M_state_beg</b></td></tr>
<tr class="separator:ac90a70f498cd4008f5550c9327bb3511"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0ab8f0eac0f0e492ead567d6475c3a79"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0ab8f0eac0f0e492ead567d6475c3a79"></a>
__state_type </td><td class="memItemRight" valign="bottom"><b>_M_state_cur</b></td></tr>
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<tr class="memitem:a31e0312e10a83a8d5139fe5f92676e99"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a31e0312e10a83a8d5139fe5f92676e99"></a>
__state_type </td><td class="memItemRight" valign="bottom"><b>_M_state_last</b></td></tr>
<tr class="separator:a31e0312e10a83a8d5139fe5f92676e99"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a209842ce6c74f204e0be7d80ab27c771"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a209842ce6c74f204e0be7d80ab27c771"></a>
bool </td><td class="memItemRight" valign="bottom"><b>_M_writing</b></td></tr>
<tr class="separator:a209842ce6c74f204e0be7d80ab27c771"><td class="memSeparator" colspan="2"> </td></tr>
<tr><td colspan="2"><div class="groupHeader"></div></td></tr>
<tr class="memitem:a0763759a2b15f0d18f869978aded8f84"><td class="memItemLeft" align="right" valign="top">char_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a0763759a2b15f0d18f869978aded8f84">_M_pback</a></td></tr>
<tr class="separator:a0763759a2b15f0d18f869978aded8f84"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a293a2014b3f6801df3764e2c502e6e25"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a293a2014b3f6801df3764e2c502e6e25">_M_pback_cur_save</a></td></tr>
<tr class="separator:a293a2014b3f6801df3764e2c502e6e25"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a65dce41d776ab7f376607436e7c5455c"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#a65dce41d776ab7f376607436e7c5455c">_M_pback_end_save</a></td></tr>
<tr class="separator:a65dce41d776ab7f376607436e7c5455c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa144642d688ad4c36807ce149e632995"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00428.html#aa144642d688ad4c36807ce149e632995">_M_pback_init</a></td></tr>
<tr class="separator:aa144642d688ad4c36807ce149e632995"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="friends"></a>
Friends</h2></td></tr>
<tr class="memitem:ae00922dec509467af39af3a99a41cd52"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ae00922dec509467af39af3a99a41cd52"></a>
class </td><td class="memItemRight" valign="bottom"><b>ios_base</b></td></tr>
<tr class="separator:ae00922dec509467af39af3a99a41cd52"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a08c7afbf0ec4df6f6d8e29a46484197d"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a08c7afbf0ec4df6f6d8e29a46484197d">_M_in_beg</a></td></tr>
<tr class="separator:a08c7afbf0ec4df6f6d8e29a46484197d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7b4e50d872ecb80867eaab9e7897b625"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a7b4e50d872ecb80867eaab9e7897b625">_M_in_cur</a></td></tr>
<tr class="separator:a7b4e50d872ecb80867eaab9e7897b625"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adf0f7b58227c057d018ab6a8b0a123d4"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#adf0f7b58227c057d018ab6a8b0a123d4">_M_in_end</a></td></tr>
<tr class="separator:adf0f7b58227c057d018ab6a8b0a123d4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a66b958241a34e8b7da6ade8f3434ce61"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a66b958241a34e8b7da6ade8f3434ce61">_M_out_beg</a></td></tr>
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<tr class="memitem:a83c368ebeed6b39269fd45d38b9a8b53"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a83c368ebeed6b39269fd45d38b9a8b53">_M_out_cur</a></td></tr>
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<tr class="memitem:af2973fa34894190ce5885749fa148bbe"><td class="memItemLeft" align="right" valign="top">char_type * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#af2973fa34894190ce5885749fa148bbe">_M_out_end</a></td></tr>
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<tr class="memitem:aef4d5a82b6a51fa750fa43d80b4a8564"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00800.html">locale</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#aef4d5a82b6a51fa750fa43d80b4a8564">_M_buf_locale</a></td></tr>
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<tr class="memitem:a8e7a46a08c85184d8b6ea1e5d87b7736"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00800.html">locale</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a8e7a46a08c85184d8b6ea1e5d87b7736">pubimbue</a> (const <a class="el" href="a00800.html">locale</a> &__loc)</td></tr>
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<tr class="memitem:a1ff453933888b07683a6cc3766684465"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00800.html">locale</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a1ff453933888b07683a6cc3766684465">getloc</a> () const </td></tr>
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<tr class="memitem:a0e3c7c3e736a215b1e05b68fa1b5aec7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00433.html">__streambuf_type</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a0e3c7c3e736a215b1e05b68fa1b5aec7">pubsetbuf</a> (char_type *__s, <a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> __n)</td></tr>
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<tr class="memitem:abaa4b2714067328ce4b91a503b17fa73"><td class="memItemLeft" align="right" valign="top">pos_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#abaa4b2714067328ce4b91a503b17fa73">pubseekoff</a> (off_type __off, <a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a">ios_base::seekdir</a> __way, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode=<a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a>|<a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a>)</td></tr>
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<tr class="memitem:a3138ab00e52afd7a538cdffa25e21937"><td class="memItemLeft" align="right" valign="top">pos_type </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#a3138ab00e52afd7a538cdffa25e21937">pubseekpos</a> (pos_type __sp, <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> __mode=<a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a>|<a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a>)</td></tr>
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<tr class="memitem:ac81d2dad6dac4c185c31937ee10077ce"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00433.html#ac81d2dad6dac4c185c31937ee10077ce">pubsync</a> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template<typename _CharT, typename _Traits><br/>
class std::basic_filebuf< _CharT, _Traits ></h3>
<p>The actual work of input and output (for files).</p>
<p>This class associates both its input and output sequence with an external disk file, and maintains a joint file position for both sequences. Many of its semantics are described in terms of similar behavior in the Standard C Library's <code>FILE</code> streams. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00069">69</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
</div><h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<td class="memname"><a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::<a class="el" href="a00428.html">basic_filebuf</a> </td>
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<p>Does not open any files. </p>
<p>The default constructor initializes the parent class using its own default ctor. </p>
<p>Definition at line <a class="el" href="a01199_source.html#l00081">81</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01516_source.html#l00190">std::basic_streambuf< _CharT, _Traits >::_M_buf_locale</a>.</p>
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<td class="memname">virtual <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::~<a class="el" href="a00428.html">basic_filebuf</a> </td>
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<p>The destructor closes the file first. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00216">216</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::_M_create_pback </td>
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<p>Initializes pback buffers, and moves normal buffers to safety. Assumptions: _M_in_cur has already been moved back </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00174">174</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<p>Deactivates pback buffer contents, and restores normal buffer. Assumptions: The pback buffer has only moved forward. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00191">191</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<td class="memname">void <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::_M_set_buffer </td>
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<p>This function sets the pointers of the internal buffer, both get and put areas. Typically:</p>
<p>__off == <a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a> - <a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a> upon underflow/uflow (<b>read</b> mode); __off == 0 upon overflow (<b>write</b> mode); __off == -1 upon open, setbuf, seekoff/pos (<b>uncommitted</b> mode).</p>
<p>NB: <a class="el" href="a00433.html#a74a6d83368391e53d884e714c65e43e5" title="Access to the put area.">epptr()</a> - <a class="el" href="a00433.html#a3ea4ba600f85337465d093a30519ad91" title="Access to the put area.">pbase()</a> == _M_buf_size - 1, since _M_buf_size reflects the actual allocated memory and the last cell is reserved for the overflow char of a full put area. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00392">392</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<p>Closes the currently associated file. </p>
<dl class="section return"><dt>Returns</dt><dd><code>this</code> on success, NULL on failure</dd></dl>
<p>If no file is currently open, this function immediately fails.</p>
<p>If a <em>put buffer area</em> exists, <code>overflow(eof)</code> is called to flush all the characters. The file is then closed.</p>
<p>If any operations fail, this function also fails. </p>
<p>Definition at line <a class="el" href="a01199_source.html#l00130">130</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00569">std::basic_ifstream< _CharT, _Traits >::close()</a>, <a class="el" href="a01198_source.html#l00742">std::basic_ofstream< _CharT, _Traits >::close()</a>, <a class="el" href="a01198_source.html#l00911">std::basic_fstream< _CharT, _Traits >::close()</a>, and <a class="el" href="a01198_source.html#l00216">std::basic_filebuf< char_type, traits_type >::~basic_filebuf()</a>.</p>
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<p>Access to the get area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
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<li><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a> returns the beginning pointer for the input sequence</li>
<li><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9" title="Access to the get area.">gptr()</a> returns the next pointer for the input sequence</li>
<li><a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a> returns the end pointer for the input sequence </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00480">480</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>, <a class="el" href="a01516_source.html#l00370">std::basic_streambuf< char_type, traits_type >::sputbackc()</a>, and <a class="el" href="a01516_source.html#l00395">std::basic_streambuf< char_type, traits_type >::sungetc()</a>.</p>
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<p>Access to the get area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
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<li><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a> returns the beginning pointer for the input sequence</li>
<li><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9" title="Access to the get area.">gptr()</a> returns the next pointer for the input sequence</li>
<li><a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a> returns the end pointer for the input sequence </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00486">486</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, <a class="el" href="a01516_source.html#l00282">std::basic_streambuf< char_type, traits_type >::in_avail()</a>, <a class="el" href="a01516_source.html#l00314">std::basic_streambuf< char_type, traits_type >::sbumpc()</a>, <a class="el" href="a01516_source.html#l00336">std::basic_streambuf< char_type, traits_type >::sgetc()</a>, <a class="el" href="a01479_source.html#l00166">std::basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc()</a>, and <a class="el" href="a01479_source.html#l00122">std::basic_stringbuf< _CharT, _Traits, _Alloc >::str()</a>.</p>
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<p>Access to the put area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
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<li><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275" title="Access to the put area.">pptr()</a> returns the next pointer for the output sequence</li>
<li><a class="el" href="a00433.html#a74a6d83368391e53d884e714c65e43e5" title="Access to the put area.">epptr()</a> returns the end pointer for the output sequence </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00533">533</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00422">std::basic_streambuf< char_type, traits_type >::sputc()</a>.</p>
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<p>Moving the read position. </p>
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<p>This just advances the read position without returning any data. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00496">496</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00314">std::basic_streambuf< char_type, traits_type >::sbumpc()</a>, <a class="el" href="a01516_source.html#l00370">std::basic_streambuf< char_type, traits_type >::sputbackc()</a>, <a class="el" href="a01516_source.html#l00395">std::basic_streambuf< char_type, traits_type >::sungetc()</a>, and <a class="el" href="a01516_source.html#l00698">std::basic_streambuf< char_type, traits_type >::uflow()</a>.</p>
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<td class="memname"><a class="el" href="a00800.html">locale</a> <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::getloc </td>
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<p>Locale access. </p>
<dl class="section return"><dt>Returns</dt><dd>The current locale in effect.</dd></dl>
<p>If pubimbue(loc) has been called, then the most recent <code>loc</code> is returned. Otherwise the global locale in effect at the time of construction is returned. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00224">224</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00207">std::basic_streambuf< char_type, traits_type >::pubimbue()</a>.</p>
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<p>Access to the get area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
<ul>
<li><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a> returns the beginning pointer for the input sequence</li>
<li><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9" title="Access to the get area.">gptr()</a> returns the next pointer for the input sequence</li>
<li><a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a> returns the end pointer for the input sequence </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00483">483</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>, <a class="el" href="a01516_source.html#l00282">std::basic_streambuf< char_type, traits_type >::in_avail()</a>, <a class="el" href="a01516_source.html#l00314">std::basic_streambuf< char_type, traits_type >::sbumpc()</a>, <a class="el" href="a01516_source.html#l00336">std::basic_streambuf< char_type, traits_type >::sgetc()</a>, <a class="el" href="a01479_source.html#l00166">std::basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc()</a>, <a class="el" href="a01516_source.html#l00370">std::basic_streambuf< char_type, traits_type >::sputbackc()</a>, <a class="el" href="a01516_source.html#l00395">std::basic_streambuf< char_type, traits_type >::sungetc()</a>, and <a class="el" href="a01516_source.html#l00698">std::basic_streambuf< char_type, traits_type >::uflow()</a>.</p>
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<p>Changes translations. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>A new locale.</td></tr>
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<p>Translations done during I/O which depend on the current locale are changed by this call. The standard adds, <em>Between invocations of this function a class derived from streambuf can safely cache results of calls to locale functions and to members of facets so obtained.</em></p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing. </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00912">912</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00401">std::ios_base::cur</a>.</p>
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<p>Looking ahead into the stream. </p>
<dl class="section return"><dt>Returns</dt><dd>The number of characters available.</dd></dl>
<p>If a read position is available, returns the number of characters available for reading before the buffer must be refilled. Otherwise returns the derived <code><a class="el" href="a00433.html#a85e9299b4d91188c1c0070111604ece8" title="Investigating the data available.">showmanyc()</a></code>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00282">282</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<p>Returns true if the external file is open. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00224">224</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00510">std::basic_ifstream< _CharT, _Traits >::is_open()</a>, <a class="el" href="a01198_source.html#l00681">std::basic_ofstream< _CharT, _Traits >::is_open()</a>, and <a class="el" href="a01198_source.html#l00850">std::basic_fstream< _CharT, _Traits >::is_open()</a>.</p>
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<p>Opens an external file. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__s</td><td>The name of the file. </td></tr>
<tr><td class="paramname">__mode</td><td>The open mode flags. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd><code>this</code> on success, NULL on failure</dd></dl>
<p>If a file is already open, this function immediately fails. Otherwise it tries to open the file named <em>__s</em> using the flags given in <em>mode</em>.</p>
<p>Table 92, adapted here, gives the relation between openmode combinations and the equivalent fopen() flags. (NB: lines app, in|out|app, in|app, binary|app, binary|in|out|app, and binary|in|app per DR 596) +------------------------------------------------------—+ | <a class="el" href="a00731.html" title="The base of the I/O class hierarchy.This class defines everything that can be defined about I/O that ...">ios_base</a> Flag combination stdio equivalent | |binary in out trunc app | +------------------------------------------------------—+ | + w | | + + a | | + a | | + + w | | + r | | + + r+ | | + + + w+ | | + + + a+ | | + + a+ | +------------------------------------------------------—+ | + + wb | | + + + ab | | + + ab | | + + + wb | | + + rb | | + + + r+b | | + + + + w+b | | + + + + a+b | | + + + a+b | +------------------------------------------------------—+ </p>
<p>Definition at line <a class="el" href="a01199_source.html#l00096">96</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00369">std::ios_base::ate</a>, <a class="el" href="a01260_source.html#l00404">std::ios_base::end</a>, and <a class="el" href="a01199_source.html#l00096">std::basic_filebuf< _CharT, _Traits >::open()</a>.</p>
<p>Referenced by <a class="el" href="a01199_source.html#l00096">std::basic_filebuf< _CharT, _Traits >::open()</a>, <a class="el" href="a01198_source.html#l00531">std::basic_ifstream< _CharT, _Traits >::open()</a>, <a class="el" href="a01198_source.html#l00702">std::basic_ofstream< _CharT, _Traits >::open()</a>, and <a class="el" href="a01198_source.html#l00871">std::basic_fstream< _CharT, _Traits >::open()</a>.</p>
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<p>Opens an external file. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__s</td><td>The name of the file. </td></tr>
<tr><td class="paramname">__mode</td><td>The open mode flags. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd><code>this</code> on success, NULL on failure </dd></dl>
<p>Definition at line <a class="el" href="a01198_source.html#l00277">277</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00277">std::basic_filebuf< char_type, traits_type >::open()</a>.</p>
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<p>Consumes data from the buffer; writes to the controlled sequence. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>eof() to indicate failure, something else (usually <em>__c</em>, or not_eof())</dd></dl>
<p>Informally, this function is called when the output buffer is full (or does not exist, as buffering need not actually be done). If a buffer exists, it is <em>consumed</em>, with <em>some effect</em> on the controlled sequence. (Typically, the buffer is written out to the sequence verbatim.) In either case, the character <em>c</em> is also written out, if <em>__c</em> is not <code>eof()</code>.</p>
<p>For a formal definition of this function, see a good text such as Langer & Kreft, or [27.5.2.4.5]/3-7.</p>
<p>A functioning output streambuf can be created by overriding only this function (no buffer area will be used).</p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns eof(). </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a225634e53ed30e3733299a1b6de0b677">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00424">424</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00401">std::ios_base::cur</a>, and <a class="el" href="a01260_source.html#l00380">std::ios_base::out</a>.</p>
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<p>Tries to back up the input sequence. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd>eof() on failure, <em>some other value</em> on success </dd></dl>
<dl class="section post"><dt>Postcondition</dt><dd>The constraints of <code><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9" title="Access to the get area.">gptr()</a></code>, <code><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a></code>, and <code><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275" title="Access to the put area.">pptr()</a></code> are the same as for <code><a class="el" href="a00428.html#a051ec9d0aa68d3bbf3a2b8cb2e41c93b" title="Fetches more data from the controlled sequence.">underflow()</a></code>.</dd></dl>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns eof(). </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a8d57a822d984ebf68160724aa9330282">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00365">365</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00401">std::ios_base::cur</a>, and <a class="el" href="a01260_source.html#l00377">std::ios_base::in</a>.</p>
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<p>Access to the put area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
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<li><a class="el" href="a00433.html#a3ea4ba600f85337465d093a30519ad91" title="Access to the put area.">pbase()</a> returns the beginning pointer for the output sequence</li>
<li><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275" title="Access to the put area.">pptr()</a> returns the next pointer for the output sequence</li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00527">527</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01479_source.html#l00122">std::basic_stringbuf< _CharT, _Traits, _Alloc >::str()</a>.</p>
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<p>Moving the write position. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<p>This just advances the write position without returning any data. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00543">543</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00422">std::basic_streambuf< char_type, traits_type >::sputc()</a>.</p>
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<td class="memname">char_type* <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::pptr </td>
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<p>Access to the put area. </p>
<p>These functions are only available to other protected functions, including derived classes.</p>
<ul>
<li><a class="el" href="a00433.html#a3ea4ba600f85337465d093a30519ad91" title="Access to the put area.">pbase()</a> returns the beginning pointer for the output sequence</li>
<li><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275" title="Access to the put area.">pptr()</a> returns the next pointer for the output sequence</li>
<li><a class="el" href="a00433.html#a74a6d83368391e53d884e714c65e43e5" title="Access to the put area.">epptr()</a> returns the end pointer for the output sequence </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00530">530</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00422">std::basic_streambuf< char_type, traits_type >::sputc()</a>, and <a class="el" href="a01479_source.html#l00122">std::basic_stringbuf< _CharT, _Traits, _Alloc >::str()</a>.</p>
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<td class="memname"><a class="el" href="a00800.html">locale</a> <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::pubimbue </td>
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<td class="paramtype">const <a class="el" href="a00800.html">locale</a> & </td>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
</table>
</dd>
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<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00207">207</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<td class="memname">pos_type <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::pubseekoff </td>
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<td class="paramtype"><a class="el" href="a00433.html#ae0d813da6c3d39659299a6e7831ae265">off_type</a> </td>
<td class="paramname"><em>__off</em>, </td>
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<td class="paramtype"><a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a">ios_base::seekdir</a> </td>
<td class="paramname"><em>__way</em>, </td>
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<td class="paramtype"><a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> </td>
<td class="paramname"><em>__mode</em> = <code><a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a> | <a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a></code> </td>
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<p>Alters the stream position. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__off</td><td>Offset. </td></tr>
<tr><td class="paramname">__way</td><td>Value for <a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a" title="This is an enumerated type.">ios_base::seekdir</a>. </td></tr>
<tr><td class="paramname">__mode</td><td>Value for <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad" title="This is a bitmask type.">ios_base::openmode</a>.</td></tr>
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<p>Calls virtual seekoff function. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00249">249</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<td class="paramtype"><a class="el" href="a00433.html#a5bc758d8b84fa134386d3ab683b880aa">pos_type</a> </td>
<td class="paramname"><em>__sp</em>, </td>
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<td class="paramtype"><a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> </td>
<td class="paramname"><em>__mode</em> = <code><a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a> | <a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a></code> </td>
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<p>Alters the stream position. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__sp</td><td>Position </td></tr>
<tr><td class="paramname">__mode</td><td>Value for <a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad" title="This is a bitmask type.">ios_base::openmode</a>.</td></tr>
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<p>Calls virtual seekpos function. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00261">261</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<td class="memname"><a class="el" href="a00433.html">__streambuf_type</a>* <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::pubsetbuf </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00433.html#a38ad1721a50a96c7d37d51a3f858a0cf">char_type</a> * </td>
<td class="paramname"><em>__s</em>, </td>
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<td></td>
<td class="paramtype"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> </td>
<td class="paramname"><em>__n</em> </td>
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<p>Entry points for derived buffer functions. </p>
<p>The public versions of <code>pubfoo</code> dispatch to the protected derived <code>foo</code> member functions, passing the arguments (if any) and returning the result unchanged. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00237">237</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<td class="memname">int <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::pubsync </td>
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<p>Calls virtual sync function. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00269">269</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00783">std::basic_istream< _CharT, _Traits >::sync()</a>.</p>
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<p>Getting the next character. </p>
<dl class="section return"><dt>Returns</dt><dd>The next character, or eof.</dd></dl>
<p>If the input read position is available, returns that character and increments the read pointer, otherwise calls and returns <code><a class="el" href="a00433.html#a4e0c932f41122eaec83e7008ece5e207" title="Fetches more data from the controlled sequence.">uflow()</a></code>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00314">314</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00402">std::basic_istream< _CharT, _Traits >::getline()</a>, <a class="el" href="a01264_source.html#l00462">std::basic_istream< _CharT, _Traits >::ignore()</a>, <a class="el" href="a01518_source.html#l00139">std::istreambuf_iterator< _CharT, _Traits >::operator++()</a>, and <a class="el" href="a01516_source.html#l00296">std::basic_streambuf< char_type, traits_type >::snextc()</a>.</p>
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<td class="memname"><a class="el" href="a00428.html">basic_filebuf</a>< _CharT, _Traits >::pos_type <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::seekoff </td>
<td>(</td>
<td class="paramtype">off_type </td>
<td class="paramname">, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="a00731.html#ac19bbe98949795f6038952b6c7759a0a">ios_base::seekdir</a> </td>
<td class="paramname">, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> </td>
<td class="paramname"> = <code><a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a> | <a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a></code> </td>
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<p>Alters the stream positions. </p>
<p>Each derived class provides its own appropriate behavior. </p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns a <code>pos_type</code> that represents an invalid stream position. </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#ad6d5177e376efdb0dccf62890eebc9b0">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00715">715</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00401">std::ios_base::cur</a>.</p>
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<td class="memname"><a class="el" href="a00428.html">basic_filebuf</a>< _CharT, _Traits >::pos_type <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::seekpos </td>
<td>(</td>
<td class="paramtype">pos_type </td>
<td class="paramname">, </td>
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<td class="paramtype"><a class="el" href="a00731.html#aa7e2408680d83e0bac8979774aeecdad">ios_base::openmode</a> </td>
<td class="paramname"> = <code><a class="el" href="a00731.html#a652e2323949eea3d906e1c81bd8ce8f7">ios_base::in</a> | <a class="el" href="a00731.html#a7187e216e5d16ec820ea1791002f85e0">ios_base::out</a></code> </td>
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<p>Alters the stream positions. </p>
<p>Each derived class provides its own appropriate behavior. </p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns a <code>pos_type</code> that represents an invalid stream position. </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a008405d586f640e109c7ab7bf424aa39">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00775">775</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00398">std::ios_base::beg</a>.</p>
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<td class="memname"><a class="el" href="a00428.html">basic_filebuf</a>< _CharT, _Traits >::<a class="el" href="a00433.html">__streambuf_type</a> * <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::setbuf </td>
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<p>Manipulates the buffer. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__s</td><td>Pointer to a buffer area. </td></tr>
<tr><td class="paramname">__n</td><td>Size of <em>__s</em>. </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd><code>this</code> </dd></dl>
<p>If no file has been opened, and both <em>__s</em> and <em>__n</em> are zero, then the stream becomes unbuffered. Otherwise, <code>__s</code> is used as a buffer; see <a href="http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html">http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html</a> for more. </p>
<p>Reimplemented from <a class="el" href="a00433.html#aad2e731291673229100bde1f24ce828f">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00686">686</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
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<p>Setting the three read area pointers. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__gbeg</td><td>A pointer. </td></tr>
<tr><td class="paramname">__gnext</td><td>A pointer. </td></tr>
<tr><td class="paramname">__gend</td><td>A pointer. </td></tr>
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</dd>
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<dl class="section post"><dt>Postcondition</dt><dd><em>__gbeg</em> == <code><a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a></code>, <em>__gnext</em> == <code><a class="el" href="a00433.html#ad631f06db33ec1d3888302ec244a6ae9" title="Access to the get area.">gptr()</a></code>, and <em>__gend</em> == <code><a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a></code> </dd></dl>
<p>Definition at line <a class="el" href="a01516_source.html#l00507">507</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>, and <a class="el" href="a01198_source.html#l00392">std::basic_filebuf< char_type, traits_type >::_M_set_buffer()</a>.</p>
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<p>Setting the three write area pointers. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__pbeg</td><td>A pointer. </td></tr>
<tr><td class="paramname">__pend</td><td>A pointer. </td></tr>
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<dl class="section post"><dt>Postcondition</dt><dd><em>__pbeg</em> == <code><a class="el" href="a00433.html#a3ea4ba600f85337465d093a30519ad91" title="Access to the put area.">pbase()</a></code>, <em>__pbeg</em> == <code><a class="el" href="a00433.html#a40fb7ed23cd6414206fc5616ab651275" title="Access to the put area.">pptr()</a></code>, and <em>__pend</em> == <code><a class="el" href="a00433.html#a74a6d83368391e53d884e714c65e43e5" title="Access to the put area.">epptr()</a></code> </dd></dl>
<p>Definition at line <a class="el" href="a01516_source.html#l00553">553</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00392">std::basic_filebuf< char_type, traits_type >::_M_set_buffer()</a>.</p>
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<p>Getting the next character. </p>
<dl class="section return"><dt>Returns</dt><dd>The next character, or eof.</dd></dl>
<p>If the input read position is available, returns that character, otherwise calls and returns <code><a class="el" href="a00433.html#aab4011ac7751c858f121b887f124529d" title="Fetches more data from the controlled sequence.">underflow()</a></code>. Does not move the read position after fetching the character. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00336">336</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00311">std::basic_istream< _CharT, _Traits >::get()</a>, <a class="el" href="a01264_source.html#l00402">std::basic_istream< _CharT, _Traits >::getline()</a>, <a class="el" href="a01264_source.html#l00495">std::basic_istream< _CharT, _Traits >::ignore()</a>, <a class="el" href="a01264_source.html#l00049">std::basic_istream< _CharT, _Traits >::sentry::sentry()</a>, and <a class="el" href="a01516_source.html#l00296">std::basic_streambuf< char_type, traits_type >::snextc()</a>.</p>
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<td class="memname"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::sgetn </td>
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<p>Entry point for xsgetn. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__s</td><td>A buffer area. </td></tr>
<tr><td class="paramname">__n</td><td>A count.</td></tr>
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</dd>
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<p>Returns xsgetn(__s,__n). The effect is to fill <em>__s</em>[0] through <em>__s</em>[__n-1] with characters from the input sequence, if possible. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00355">355</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<td class="memname"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::showmanyc </td>
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<p>Investigating the data available. </p>
<dl class="section return"><dt>Returns</dt><dd>An estimate of the number of characters available in the input sequence, or -1.</dd></dl>
<p><em>If it returns a positive value, then successive calls to <code><a class="el" href="a00428.html#a051ec9d0aa68d3bbf3a2b8cb2e41c93b" title="Fetches more data from the controlled sequence.">underflow()</a></code> will not return <code>traits::eof()</code> until at least that number of characters have been supplied. If <code><a class="el" href="a00428.html#a0e8e4218ba9766e34b74e69b17fb28b3" title="Investigating the data available.">showmanyc()</a></code> returns -1, then calls to <code><a class="el" href="a00428.html#a051ec9d0aa68d3bbf3a2b8cb2e41c93b" title="Fetches more data from the controlled sequence.">underflow()</a></code> or <code><a class="el" href="a00433.html#a4e0c932f41122eaec83e7008ece5e207" title="Fetches more data from the controlled sequence.">uflow()</a></code> will fail.</em> [27.5.2.4.3]/1</p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns zero. </dd>
<dd>
The standard adds that <em>the intention is not only that the calls [to underflow or uflow] will not return <code>eof()</code> but that they will return immediately.</em> </dd>
<dd>
The standard adds that <em>the morphemes of <code>showmanyc</code> are <b>es-how-many-see</b>, not <b>show-manic</b>.</em> </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a85e9299b4d91188c1c0070111604ece8">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00180">180</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00374">std::ios_base::binary</a>, and <a class="el" href="a01260_source.html#l00377">std::ios_base::in</a>.</p>
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<p>Getting the next character. </p>
<dl class="section return"><dt>Returns</dt><dd>The next character, or eof.</dd></dl>
<p>Calls <code><a class="el" href="a00433.html#a72d8037e21ad370e3643ff3c865f91f9" title="Getting the next character.">sbumpc()</a></code>, and if that function returns <code>traits::eof()</code>, so does this function. Otherwise, <code><a class="el" href="a00433.html#ac773fb2c87cf938fb6eb89c987f8e04e" title="Getting the next character.">sgetc()</a></code>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00296">296</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00311">std::basic_istream< _CharT, _Traits >::get()</a>, <a class="el" href="a01264_source.html#l00402">std::basic_istream< _CharT, _Traits >::getline()</a>, <a class="el" href="a01264_source.html#l00495">std::basic_istream< _CharT, _Traits >::ignore()</a>, and <a class="el" href="a01264_source.html#l00049">std::basic_istream< _CharT, _Traits >::sentry::sentry()</a>.</p>
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<p>Pushing characters back into the input stream. </p>
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<dl class="section return"><dt>Returns</dt><dd>The previous character, if possible.</dd></dl>
<p>Similar to <a class="el" href="a00433.html#a8d42bd5b22d246f15a8dd0a8614c0e3f" title="Moving backwards in the input stream.">sungetc()</a>, but <em>__c</em> is pushed onto the stream instead of <em>the previous character.</em> If successful, the next character fetched from the input stream will be <em>__c</em>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00370">370</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00713">std::basic_istream< _CharT, _Traits >::putback()</a>.</p>
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<p>Entry point for all single-character output functions. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd><em>__c</em>, if possible.</dd></dl>
<p>One of two public output functions.</p>
<p>If a write position is available for the output sequence (i.e., the buffer is not full), stores <em>__c</em> in that position, increments the position, and returns <code>traits::to_int_type(__c)</code>. If a write position is not available, returns <code>overflow(__c)</code>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00422">422</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00358">std::basic_istream< _CharT, _Traits >::get()</a>, and <a class="el" href="a01518_source.html#l00252">std::ostreambuf_iterator< _CharT, _Traits >::operator=()</a>.</p>
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<p>Entry point for all single-character output functions. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<p>One of two public output functions.</p>
<p>Returns xsputn(__s,__n). The effect is to write <em>__s</em>[0] through <em>__s</em>[__n-1] to the output sequence, if possible. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00448">448</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
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<p>Moving backwards in the input stream. </p>
<dl class="section return"><dt>Returns</dt><dd>The previous character, if possible.</dd></dl>
<p>If a putback position is available, this function decrements the input pointer and returns that character. Otherwise, calls and returns <a class="el" href="a00433.html#a8d57a822d984ebf68160724aa9330282" title="Tries to back up the input sequence.">pbackfail()</a>. The effect is to <em>unget</em> the last character <em>gotten</em>. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00395">395</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01264_source.html#l00748">std::basic_istream< _CharT, _Traits >::unget()</a>.</p>
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<p>Synchronizes the buffer arrays with the controlled sequences. </p>
<dl class="section return"><dt>Returns</dt><dd>-1 on failure.</dd></dl>
<p>Each derived class provides its own appropriate behavior, including the definition of <em>failure</em>. </p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns zero. </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#a407510ac810a42b173f3bd553959bfb5">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00895">895</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
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<p>Fetches more data from the controlled sequence. </p>
<dl class="section return"><dt>Returns</dt><dd>The first character from the <em>pending sequence</em>.</dd></dl>
<p>Informally, this function does the same thing as <code><a class="el" href="a00433.html#aab4011ac7751c858f121b887f124529d" title="Fetches more data from the controlled sequence.">underflow()</a></code>, and in fact is required to call that function. It also returns the new character, like <code><a class="el" href="a00433.html#aab4011ac7751c858f121b887f124529d" title="Fetches more data from the controlled sequence.">underflow()</a></code> does. However, this function also moves the read position forward by one. </p>
<p>Reimplemented in <a class="el" href="a00070.html#ad8647cc09ffa804cfe6b903b8415c9aa">__gnu_cxx::stdio_sync_filebuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01516_source.html#l00698">698</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00314">std::basic_streambuf< char_type, traits_type >::sbumpc()</a>.</p>
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<p>Fetches more data from the controlled sequence. </p>
<dl class="section return"><dt>Returns</dt><dd>The first character from the <em>pending sequence</em>.</dd></dl>
<p>Informally, this function is called when the input buffer is exhausted (or does not exist, as buffering need not actually be done). If a buffer exists, it is <em>refilled</em>. In either case, the next available character is returned, or <code>traits::eof()</code> to indicate a null pending sequence.</p>
<p>For a formal definition of the pending sequence, see a good text such as Langer & Kreft, or [27.5.2.4.3]/7-14.</p>
<p>A functioning input streambuf can be created by overriding only this function (no buffer area will be used). For an example, see <a href="http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25.html">http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25.html</a></p>
<dl class="section note"><dt>Note</dt><dd>Base class version does nothing, returns eof(). </dd></dl>
<p>Reimplemented from <a class="el" href="a00433.html#aab4011ac7751c858f121b887f124529d">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00206">206</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00377">std::ios_base::in</a>, and <a class="el" href="a01491_source.html#l00187">std::min()</a>.</p>
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<p>Multiple character extraction. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__s</td><td>A buffer area. </td></tr>
<tr><td class="paramname">__n</td><td>Maximum number of characters to assign. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The number of characters assigned.</dd></dl>
<p>Fills <em>__s</em>[0] through <em>__s</em>[__n-1] with characters from the input sequence, as if by <code><a class="el" href="a00433.html#a72d8037e21ad370e3643ff3c865f91f9" title="Getting the next character.">sbumpc()</a></code>. Stops when either <em>__n</em> characters have been copied, or when <code>traits::eof()</code> would be copied.</p>
<p>It is expected that derived classes provide a more efficient implementation by overriding this definition. </p>
<p>Reimplemented from <a class="el" href="a00433.html#a7403acdc30aa0678bf1f9d211b61f3df">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00551">551</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01260_source.html#l00377">std::ios_base::in</a>.</p>
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<td class="memname"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::xsputn </td>
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<p>Multiple character insertion. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__s</td><td>A buffer area. </td></tr>
<tr><td class="paramname">__n</td><td>Maximum number of characters to write. </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>The number of characters written.</dd></dl>
<p>Writes <em>__s</em>[0] through <em>__s</em>[__n-1] to the output sequence, as if by <code><a class="el" href="a00433.html#af3504dac5b4cd940dbce97ddc5ed0c25" title="Entry point for all single-character output functions.">sputc()</a></code>. Stops when either <em>n</em> characters have been copied, or when <code><a class="el" href="a00433.html#af3504dac5b4cd940dbce97ddc5ed0c25" title="Entry point for all single-character output functions.">sputc()</a></code> would return <code>traits::eof()</code>.</p>
<p>It is expected that derived classes provide a more efficient implementation by overriding this definition. </p>
<p>Reimplemented from <a class="el" href="a00433.html#a2e291c3500330e91d2804732aa7e6378">std::basic_streambuf< _CharT, _Traits ></a>.</p>
<p>Definition at line <a class="el" href="a01199_source.html#l00639">639</a> of file <a class="el" href="a01199_source.html">fstream.tcc</a>.</p>
<p>References <a class="el" href="a01491_source.html#l00187">std::min()</a>, and <a class="el" href="a01260_source.html#l00380">std::ios_base::out</a>.</p>
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<h2 class="groupheader">Member Data Documentation</h2>
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<p>Pointer to the beginning of internal buffer. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00111">111</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>, and <a class="el" href="a01198_source.html#l00392">std::basic_filebuf< char_type, traits_type >::_M_set_buffer()</a>.</p>
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<td class="memname"><a class="el" href="a00800.html">locale</a> <a class="el" href="a00433.html">std::basic_streambuf</a>< _CharT, _Traits >::_M_buf_locale</td>
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<p>Current locale setting. </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00190">190</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01199_source.html#l00081">std::basic_filebuf< _CharT, _Traits >::basic_filebuf()</a>, <a class="el" href="a01516_source.html#l00224">std::basic_streambuf< char_type, traits_type >::getloc()</a>, and <a class="el" href="a01516_source.html#l00207">std::basic_streambuf< char_type, traits_type >::pubimbue()</a>.</p>
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<p>Actual size of internal buffer. This number is equal to the size of the put area + 1 position, reserved for the overflow char of a full area. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00118">118</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00392">std::basic_filebuf< char_type, traits_type >::_M_set_buffer()</a>.</p>
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<p>Buffer for external characters. Used for input when codecvt::always_noconv() == false. When valid, this corresponds to <a class="el" href="a00433.html#a8a98bb10a958b9f1ad62e5444ff614ba" title="Access to the get area.">eback()</a>. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00153">153</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<td class="memname"><a class="el" href="a01604.html#a05eef5582eb5de62b76db4916f7adb84">streamsize</a> <a class="el" href="a00428.html">std::basic_filebuf</a>< _CharT, _Traits >::_M_ext_buf_size</td>
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<p>Size of buffer held by _M_ext_buf. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00158">158</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<p>Pointers into the buffer held by _M_ext_buf that delimit a subsequence of bytes that have been read but not yet converted. When valid, _M_ext_next corresponds to <a class="el" href="a00433.html#a271d085f48ab53194825e04e7caab94c" title="Access to the get area.">egptr()</a>. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00165">165</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<p>This is based on _IO_FILE, just reordered to be more consistent, and is intended to be the most minimal abstraction for an internal buffer.</p>
<ul>
<li>get == input == read</li>
<li>put == output == write </li>
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<p>Definition at line <a class="el" href="a01516_source.html#l00182">182</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00480">std::basic_streambuf< char_type, traits_type >::eback()</a>, and <a class="el" href="a01516_source.html#l00507">std::basic_streambuf< char_type, traits_type >::setg()</a>.</p>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00183">183</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00496">std::basic_streambuf< char_type, traits_type >::gbump()</a>, <a class="el" href="a01516_source.html#l00483">std::basic_streambuf< char_type, traits_type >::gptr()</a>, and <a class="el" href="a01516_source.html#l00507">std::basic_streambuf< char_type, traits_type >::setg()</a>.</p>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00184">184</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00486">std::basic_streambuf< char_type, traits_type >::egptr()</a>, and <a class="el" href="a01516_source.html#l00507">std::basic_streambuf< char_type, traits_type >::setg()</a>.</p>
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<p>Place to stash in || out || in | out settings for current filebuf. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00096">96</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00392">std::basic_filebuf< char_type, traits_type >::_M_set_buffer()</a>.</p>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00185">185</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00527">std::basic_streambuf< char_type, traits_type >::pbase()</a>, and <a class="el" href="a01516_source.html#l00553">std::basic_streambuf< char_type, traits_type >::setp()</a>.</p>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
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</dl>
<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00186">186</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00543">std::basic_streambuf< char_type, traits_type >::pbump()</a>, <a class="el" href="a01516_source.html#l00530">std::basic_streambuf< char_type, traits_type >::pptr()</a>, and <a class="el" href="a01516_source.html#l00553">std::basic_streambuf< char_type, traits_type >::setp()</a>.</p>
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<p>Entry point for <a class="el" href="a00433.html#a70048277614282b8631e5fbf3106093e" title="Changes translations.">imbue()</a>. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">__loc</td><td>The new locale. </td></tr>
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</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The previous locale.</dd></dl>
<p>Calls the derived imbue(__loc). </p>
<p>Definition at line <a class="el" href="a01516_source.html#l00187">187</a> of file <a class="el" href="a01516_source.html">streambuf</a>.</p>
<p>Referenced by <a class="el" href="a01516_source.html#l00533">std::basic_streambuf< char_type, traits_type >::epptr()</a>, and <a class="el" href="a01516_source.html#l00553">std::basic_streambuf< char_type, traits_type >::setp()</a>.</p>
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<p>Necessary bits for putback buffer management.</p>
<dl class="section note"><dt>Note</dt><dd>pbacks of over one character are not currently supported. </dd></dl>
<p>Definition at line <a class="el" href="a01198_source.html#l00139">139</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>.</p>
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<p>Necessary bits for putback buffer management.</p>
<dl class="section note"><dt>Note</dt><dd>pbacks of over one character are not currently supported. </dd></dl>
<p>Definition at line <a class="el" href="a01198_source.html#l00140">140</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, and <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>.</p>
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<p>Necessary bits for putback buffer management.</p>
<dl class="section note"><dt>Note</dt><dd>pbacks of over one character are not currently supported. </dd></dl>
<p>Definition at line <a class="el" href="a01198_source.html#l00141">141</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, and <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>.</p>
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<p>Necessary bits for putback buffer management.</p>
<dl class="section note"><dt>Note</dt><dd>pbacks of over one character are not currently supported. </dd></dl>
<p>Definition at line <a class="el" href="a01198_source.html#l00142">142</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
<p>Referenced by <a class="el" href="a01198_source.html#l00174">std::basic_filebuf< char_type, traits_type >::_M_create_pback()</a>, and <a class="el" href="a01198_source.html#l00191">std::basic_filebuf< char_type, traits_type >::_M_destroy_pback()</a>.</p>
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<p>_M_reading == false && _M_writing == false for <b>uncommitted</b> mode; _M_reading == true for <b>read</b> mode; _M_writing == true for <b>write</b> mode;</p>
<p>NB: _M_reading == true && _M_writing == true is unused. </p>
<p>Definition at line <a class="el" href="a01198_source.html#l00130">130</a> of file <a class="el" href="a01198_source.html">fstream</a>.</p>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="a01198_source.html">fstream</a></li>
<li><a class="el" href="a01199_source.html">fstream.tcc</a></li>
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