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<hr><h1>bbuf.c File Reference</h1><table border=0 cellpadding=0 cellspacing=0>
<tr><td></td></tr>
<tr><td colspan=2><br><h2>Functions</h2></td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="types_8h.html#a5">wmf_error_t</a> </td><td valign=bottom><a class="el" href="bbuf_8c.html#a0">wmf_bbuf_input</a> (<a class="el" href="types_8h.html#a22">wmfAPI</a> *API, <a class="el" href="types_8h.html#a8">wmfRead</a> fp_read, <a class="el" href="types_8h.html#a9">wmfSeek</a> fp_seek, <a class="el" href="types_8h.html#a10">wmfTell</a> fp_tell, void *user_data)</td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="types_8h.html#a5">wmf_error_t</a> </td><td valign=bottom><a class="el" href="bbuf_8c.html#a1">wmf_file_open</a> (<a class="el" href="types_8h.html#a22">wmfAPI</a> *API, const char *file)</td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="types_8h.html#a5">wmf_error_t</a> </td><td valign=bottom><a class="el" href="bbuf_8c.html#a2">wmf_file_close</a> (<a class="el" href="types_8h.html#a22">wmfAPI</a> *API)</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="bbuf_8c.html#a3">wmf_file_read</a> (void *user_data)</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="bbuf_8c.html#a4">wmf_file_seek</a> (void *user_data, long pos)</td></tr>
<tr><td nowrap align=right valign=top>long </td><td valign=bottom><a class="el" href="bbuf_8c.html#a5">wmf_file_tell</a> (void *user_data)</td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="types_8h.html#a5">wmf_error_t</a> </td><td valign=bottom><a class="el" href="bbuf_8c.html#a6">wmf_mem_open</a> (<a class="el" href="types_8h.html#a22">wmfAPI</a> *API, unsigned char *mem, long length)</td></tr>
<tr><td nowrap align=right valign=top><a class="el" href="types_8h.html#a5">wmf_error_t</a> </td><td valign=bottom><a class="el" href="bbuf_8c.html#a7">wmf_mem_close</a> (<a class="el" href="types_8h.html#a22">wmfAPI</a> *API)</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="bbuf_8c.html#a8">wmf_mem_read</a> (void *user_data)</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="bbuf_8c.html#a9">wmf_mem_seek</a> (void *user_data, long pos)</td></tr>
<tr><td nowrap align=right valign=top>long </td><td valign=bottom><a class="el" href="bbuf_8c.html#a10">wmf_mem_tell</a> (void *user_data)</td></tr>
</table>
<hr><h2>Function Documentation</h2>
<a name="a0" doxytag="bbuf.c::wmf_bbuf_input"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="types_8h.html#a5">wmf_error_t</a> wmf_bbuf_input </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="types_8h.html#a22">wmfAPI</a> * </td>
<td class="mdname" nowrap> <em>API</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="types_8h.html#a8">wmfRead</a> </td>
<td class="mdname" nowrap> <em>fp_read</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="types_8h.html#a9">wmfSeek</a> </td>
<td class="mdname" nowrap> <em>fp_seek</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="types_8h.html#a10">wmfTell</a> </td>
<td class="mdname" nowrap> <em>fp_tell</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>void * </td>
<td class="mdname" nowrap> <em>user_data</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Set custom metafile input-stream handler functions.<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>API</em> </td><td>
the API handle </td></tr>
<tr><td valign=top><em>fp_read</em> </td><td>
function to read a byte </td></tr>
<tr><td valign=top><em>fp_seek</em> </td><td>
function to set position </td></tr>
<tr><td valign=top><em>fp_tell</em> </td><td>
function to get position </td></tr>
<tr><td valign=top><em>user_data</em> </td><td>
handle for user data</td></tr>
</table>
</dl><b>libwmf</b> has simple methods for reading either from file or from memory, but many applications will want to use customized variants of these. <a class="el" href="bbuf_8c.html#a0">wmf_bbuf_input()</a> enables this.
<p>
<div class="fragment"><pre>
typedef int (*wmfRead) (void* user_data);
typedef int (*wmfSeek) (void* user_data,long position);
typedef long (*wmfTell) (void* user_data);
</pre></div>
<p>
<b><a class="el" href="types_8h.html#a8">wmfRead</a></b> returns unsigned char cast to int, or EOF (cf. fgetc())
<p>
<b><a class="el" href="types_8h.html#a9">wmfSeek</a></b> returns (-1) on error, otherwise 0 (cf. fseek())
<p>
<b><a class="el" href="types_8h.html#a10">wmfTell</a></b> returns (-1) on error, otherwise current position (cf. ftell())
<p>
<dl compact><dt><b>Returns: </b></dt><dd>
Returns the library error state (<b>wmf_E_None</b> on success). Possible library error state of <b>wmf_E_Glitch</b>, if any of the three functions is zero. </dl> </td>
</tr>
</table>
<a name="a2" doxytag="bbuf.c::wmf_file_close"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="types_8h.html#a5">wmf_error_t</a> wmf_file_close </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="types_8h.html#a22">wmfAPI</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>API</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Close metafile input file stream.<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>API</em> </td><td>
the API handle</td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
Returns the library error state (<b>wmf_E_None</b> on success). Possible library error state of <b>wmf_E_Glitch</b>. </dl> </td>
</tr>
</table>
<a name="a1" doxytag="bbuf.c::wmf_file_open"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="types_8h.html#a5">wmf_error_t</a> wmf_file_open </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="types_8h.html#a22">wmfAPI</a> * </td>
<td class="mdname" nowrap> <em>API</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>file</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Open file as metafile.<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>API</em> </td><td>
the API handle </td></tr>
<tr><td valign=top><em>file</em> </td><td>
file name</td></tr>
</table>
</dl>Simple method for reading from file.
<p>
<dl compact><dt><b>Returns: </b></dt><dd>
Returns the library error state (<b>wmf_E_None</b> on success). Possible library error states of <b>wmf_E_Glitch</b> or <b>wmf_E_BadFile</b>. </dl> </td>
</tr>
</table>
<a name="a3" doxytag="bbuf.c::wmf_file_read"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int wmf_file_read </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
file input (wmf_file_open): fgetc() </td>
</tr>
</table>
<a name="a4" doxytag="bbuf.c::wmf_file_seek"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int wmf_file_seek </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> , </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>long </td>
<td class="mdname" nowrap> </td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
file input (wmf_file_open): fseek() </td>
</tr>
</table>
<a name="a5" doxytag="bbuf.c::wmf_file_tell"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> long wmf_file_tell </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
file input (wmf_file_open): ftell() </td>
</tr>
</table>
<a name="a7" doxytag="bbuf.c::wmf_mem_close"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="types_8h.html#a5">wmf_error_t</a> wmf_mem_close </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="types_8h.html#a22">wmfAPI</a> * </td>
<td class="mdname1" valign="top" nowrap> <em>API</em> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Close metafile input memory stream.<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>API</em> </td><td>
the API handle</td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
Returns the library error state (<b>wmf_E_None</b> on success). </dl> </td>
</tr>
</table>
<a name="a6" doxytag="bbuf.c::wmf_mem_open"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="types_8h.html#a5">wmf_error_t</a> wmf_mem_open </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="types_8h.html#a22">wmfAPI</a> * </td>
<td class="mdname" nowrap> <em>API</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned char * </td>
<td class="mdname" nowrap> <em>mem</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>long </td>
<td class="mdname" nowrap> <em>length</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Open metafile in memory.<dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>API</em> </td><td>
the API handle </td></tr>
<tr><td valign=top><em>mem</em> </td><td>
the metafile in memory </td></tr>
<tr><td valign=top><em>length</em> </td><td>
the length in bytes of metafile data</td></tr>
</table>
</dl>Simple method for reading from memory as array of unsigned char.
<p>
<dl compact><dt><b>Returns: </b></dt><dd>
Returns the library error state (<b>wmf_E_None</b> on success). Possible library error state of <b>wmf_E_Glitch</b>. </dl> </td>
</tr>
</table>
<a name="a8" doxytag="bbuf.c::wmf_mem_read"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int wmf_mem_read </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
memory input (wmf_mem_open): fgetc() equiv. </td>
</tr>
</table>
<a name="a9" doxytag="bbuf.c::wmf_mem_seek"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int wmf_mem_seek </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> , </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>long </td>
<td class="mdname" nowrap> </td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
memory input (wmf_mem_open): fseek() equiv. </td>
</tr>
</table>
<a name="a10" doxytag="bbuf.c::wmf_mem_tell"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> long wmf_mem_tell </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top">) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
memory input (wmf_mem_open): ftell() equiv. </td>
</tr>
</table>
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