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<html><head><title>dlib C++ Library - jdatadst.c</title></head><body bgcolor='white'><pre> |
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<font color='#009900'>/*
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* jdatadst.c
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*
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* Copyright (C) 1994-1996, Thomas G. Lane.
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* Modified 2009-2012 by Guido Vollbeding.
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* This file is part of the Independent JPEG Group's software.
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* For conditions of distribution and use, see the accompanying README file.
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*
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* This file contains compression data destination routines for the case of
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* emitting JPEG data to memory or to a file (or any stdio stream).
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* While these routines are sufficient for most applications,
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* some will want to use a different destination manager.
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* IMPORTANT: we assume that fwrite() will correctly transcribe an array of
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* JOCTETs into 8-bit-wide elements on external storage. If char is wider
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* than 8 bits on your machine, you may need to do some tweaking.
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*/</font>
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<font color='#009900'>/* this is not a core library module, so it doesn't define JPEG_INTERNALS */</font>
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<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jinclude.h.html'>jinclude.h</a>"
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<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jpeglib.h.html'>jpeglib.h</a>"
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<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jerror.h.html'>jerror.h</a>"
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<font color='#0000FF'>#ifndef</font> HAVE_STDLIB_H <font color='#009900'>/* <stdlib.h> should declare malloc(),free() */</font>
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<font color='#0000FF'>extern</font> <font color='#0000FF'><u>void</u></font> <font color='#5555FF'>*</font> malloc <b><a name='JPP'></a>JPP</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font> size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
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<font color='#0000FF'>extern</font> <font color='#0000FF'><u>void</u></font> free <b><a name='JPP'></a>JPP</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font> <font color='#5555FF'>*</font>ptr<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
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<font color='#0000FF'>#endif</font>
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<font color='#009900'>/* Expanded data destination object for stdio output */</font>
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<font color='#0000FF'>typedef</font> <font color='#0000FF'>struct</font> <b>{</b>
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<font color='#0000FF'>struct</font> jpeg_destination_mgr pub; <font color='#009900'>/* public fields */</font>
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FILE <font color='#5555FF'>*</font> outfile; <font color='#009900'>/* target stream */</font>
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JOCTET <font color='#5555FF'>*</font> buffer; <font color='#009900'>/* start of buffer */</font>
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<b>}</b> my_destination_mgr;
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<font color='#0000FF'>typedef</font> my_destination_mgr <font color='#5555FF'>*</font> my_dest_ptr;
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<font color='#0000FF'>#define</font> OUTPUT_BUF_SIZE <font color='#979000'>4096</font> <font color='#009900'>/* choose an efficiently fwrite'able size */</font>
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<font color='#009900'>/* Expanded data destination object for memory output */</font>
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<font color='#0000FF'>typedef</font> <font color='#0000FF'>struct</font> <b>{</b>
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<font color='#0000FF'>struct</font> jpeg_destination_mgr pub; <font color='#009900'>/* public fields */</font>
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<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font color='#5555FF'>*</font> outbuffer; <font color='#009900'>/* target buffer */</font>
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<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>long</u></font> <font color='#5555FF'>*</font> outsize;
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<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font> newbuffer; <font color='#009900'>/* newly allocated buffer */</font>
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JOCTET <font color='#5555FF'>*</font> buffer; <font color='#009900'>/* start of buffer */</font>
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<font color='#0000FF'><u>size_t</u></font> bufsize;
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<b>}</b> my_mem_destination_mgr;
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<font color='#0000FF'>typedef</font> my_mem_destination_mgr <font color='#5555FF'>*</font> my_mem_dest_ptr;
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<font color='#009900'>/*
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* Initialize destination --- called by jpeg_start_compress
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* before any data is actually written.
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*/</font>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='init_destination'></a>init_destination</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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my_dest_ptr dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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<font color='#009900'>/* Allocate the output buffer --- it will be released when done with image */</font>
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>mem<font color='#5555FF'>-</font><font color='#5555FF'>></font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_IMAGE,
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OUTPUT_BUF_SIZE <font color='#5555FF'>*</font> <font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.next_output_byte <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer <font color='#5555FF'>=</font> OUTPUT_BUF_SIZE;
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<b>}</b>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='init_mem_destination'></a>init_mem_destination</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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<font color='#009900'>/* no work necessary here */</font>
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<b>}</b>
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<font color='#009900'>/*
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* Empty the output buffer --- called whenever buffer fills up.
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*
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* In typical applications, this should write the entire output buffer
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* (ignoring the current state of next_output_byte & free_in_buffer),
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* reset the pointer & count to the start of the buffer, and return TRUE
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* indicating that the buffer has been dumped.
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*
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* In applications that need to be able to suspend compression due to output
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* overrun, a FALSE return indicates that the buffer cannot be emptied now.
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* In this situation, the compressor will return to its caller (possibly with
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* an indication that it has not accepted all the supplied scanlines). The
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* application should resume compression after it has made more room in the
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* output buffer. Note that there are substantial restrictions on the use of
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* suspension --- see the documentation.
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*
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* When suspending, the compressor will back up to a convenient restart point
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* (typically the start of the current MCU). next_output_byte & free_in_buffer
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* indicate where the restart point will be if the current call returns FALSE.
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* Data beyond this point will be regenerated after resumption, so do not
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* write it out when emptying the buffer externally.
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*/</font>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font>boolean<font face='Lucida Console'>)</font>
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<b><a name='empty_output_buffer'></a>empty_output_buffer</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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my_dest_ptr dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>JFWRITE</font><font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outfile, dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer, OUTPUT_BUF_SIZE<font face='Lucida Console'>)</font> <font color='#5555FF'>!</font><font color='#5555FF'>=</font>
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<font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font><font face='Lucida Console'>)</font> OUTPUT_BUF_SIZE<font face='Lucida Console'>)</font>
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<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_FILE_WRITE<font face='Lucida Console'>)</font>;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.next_output_byte <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer <font color='#5555FF'>=</font> OUTPUT_BUF_SIZE;
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<font color='#0000FF'>return</font> TRUE;
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<b>}</b>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font>boolean<font face='Lucida Console'>)</font>
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<b><a name='empty_mem_output_buffer'></a>empty_mem_output_buffer</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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<font color='#0000FF'><u>size_t</u></font> nextsize;
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JOCTET <font color='#5555FF'>*</font> nextbuffer;
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my_mem_dest_ptr dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_mem_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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<font color='#009900'>/* Try to allocate new buffer with double size */</font>
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nextsize <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize <font color='#5555FF'>*</font> <font color='#979000'>2</font>;
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nextbuffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET <font color='#5555FF'>*</font><font face='Lucida Console'>)</font> <font color='#BB00BB'>malloc</font><font face='Lucida Console'>(</font>nextsize<font face='Lucida Console'>)</font>;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>nextbuffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
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<font color='#BB00BB'>ERREXIT1</font><font face='Lucida Console'>(</font>cinfo, JERR_OUT_OF_MEMORY, <font color='#979000'>10</font><font face='Lucida Console'>)</font>;
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<font color='#BB00BB'>MEMCOPY</font><font face='Lucida Console'>(</font>nextbuffer, dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer, dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize<font face='Lucida Console'>)</font>;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
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<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer<font face='Lucida Console'>)</font>;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer <font color='#5555FF'>=</font> nextbuffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.next_output_byte <font color='#5555FF'>=</font> nextbuffer <font color='#5555FF'>+</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer <font color='#5555FF'>=</font> nextbuffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize <font color='#5555FF'>=</font> nextsize;
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<font color='#0000FF'>return</font> TRUE;
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<b>}</b>
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<font color='#009900'>/*
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* Terminate destination --- called by jpeg_finish_compress
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* after all data has been written. Usually needs to flush buffer.
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*
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* NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
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* application must deal with any cleanup that should happen even
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* for error exit.
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*/</font>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='term_destination'></a>term_destination</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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my_dest_ptr dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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<font color='#0000FF'><u>size_t</u></font> datacount <font color='#5555FF'>=</font> OUTPUT_BUF_SIZE <font color='#5555FF'>-</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer;
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<font color='#009900'>/* Write any data remaining in the buffer */</font>
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>datacount <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>JFWRITE</font><font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outfile, dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer, datacount<font face='Lucida Console'>)</font> <font color='#5555FF'>!</font><font color='#5555FF'>=</font> datacount<font face='Lucida Console'>)</font>
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<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_FILE_WRITE<font face='Lucida Console'>)</font>;
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<b>}</b>
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<font color='#BB00BB'>fflush</font><font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outfile<font face='Lucida Console'>)</font>;
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<font color='#009900'>/* Make sure we wrote the output file OK */</font>
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>ferror</font><font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outfile<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
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<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_FILE_WRITE<font face='Lucida Console'>)</font>;
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<b>}</b>
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<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='term_mem_destination'></a>term_mem_destination</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo<font face='Lucida Console'>)</font>
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<b>{</b>
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my_mem_dest_ptr dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_mem_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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<font color='#5555FF'>*</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outbuffer <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer;
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<font color='#5555FF'>*</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outsize <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize <font color='#5555FF'>-</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer;
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<b>}</b>
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<font color='#009900'>/*
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* Prepare for output to a stdio stream.
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* The caller must have already opened the stream, and is responsible
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* for closing it after finishing compression.
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*/</font>
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<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='jpeg_stdio_dest'></a>jpeg_stdio_dest</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo, FILE <font color='#5555FF'>*</font> outfile<font face='Lucida Console'>)</font>
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<b>{</b>
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my_dest_ptr dest;
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<font color='#009900'>/* The destination object is made permanent so that multiple JPEG images
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* can be written to the same file without re-executing jpeg_stdio_dest.
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* This makes it dangerous to use this manager and a different destination
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* manager serially with the same JPEG object, because their private object
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* sizes may be different. Caveat programmer.
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*/</font>
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* first time for this JPEG object? */</font>
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cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> jpeg_destination_mgr <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>mem<font color='#5555FF'>-</font><font color='#5555FF'>></font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
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<font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>my_destination_mgr<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
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<b>}</b>
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dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.init_destination <font color='#5555FF'>=</font> init_destination;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.empty_output_buffer <font color='#5555FF'>=</font> empty_output_buffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.term_destination <font color='#5555FF'>=</font> term_destination;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outfile <font color='#5555FF'>=</font> outfile;
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<b>}</b>
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<font color='#009900'>/*
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* Prepare for output to a memory buffer.
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* The caller may supply an own initial buffer with appropriate size.
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* Otherwise, or when the actual data output exceeds the given size,
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* the library adapts the buffer size as necessary.
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* The standard library functions malloc/free are used for allocating
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* larger memory, so the buffer is available to the application after
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* finishing compression, and then the application is responsible for
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* freeing the requested memory.
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*/</font>
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<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
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<b><a name='jpeg_mem_dest'></a>jpeg_mem_dest</b> <font face='Lucida Console'>(</font>j_compress_ptr cinfo,
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<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font color='#5555FF'>*</font> outbuffer, <font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>long</u></font> <font color='#5555FF'>*</font> outsize<font face='Lucida Console'>)</font>
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<b>{</b>
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my_mem_dest_ptr dest;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>outbuffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> outsize <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <font color='#009900'>/* sanity check */</font>
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<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_BUFFER_SIZE<font face='Lucida Console'>)</font>;
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<font color='#009900'>/* The destination object is made permanent so that multiple JPEG images
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* can be written to the same buffer without re-executing jpeg_mem_dest.
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*/</font>
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* first time for this JPEG object? */</font>
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cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> jpeg_destination_mgr <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>mem<font color='#5555FF'>-</font><font color='#5555FF'>></font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
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<font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>my_mem_destination_mgr<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
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<b>}</b>
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dest <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_mem_dest_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>dest;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.init_destination <font color='#5555FF'>=</font> init_mem_destination;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.empty_output_buffer <font color='#5555FF'>=</font> empty_mem_output_buffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.term_destination <font color='#5555FF'>=</font> term_mem_destination;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outbuffer <font color='#5555FF'>=</font> outbuffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>outsize <font color='#5555FF'>=</font> outsize;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer <font color='#5555FF'>=</font> NULL;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>outbuffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> <font color='#5555FF'>*</font>outsize <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
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<font color='#009900'>/* Allocate initial buffer */</font>
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer <font color='#5555FF'>=</font> <font color='#5555FF'>*</font>outbuffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font> <font color='#BB00BB'>malloc</font><font face='Lucida Console'>(</font>OUTPUT_BUF_SIZE<font face='Lucida Console'>)</font>;
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>newbuffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
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<font color='#BB00BB'>ERREXIT1</font><font face='Lucida Console'>(</font>cinfo, JERR_OUT_OF_MEMORY, <font color='#979000'>10</font><font face='Lucida Console'>)</font>;
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<font color='#5555FF'>*</font>outsize <font color='#5555FF'>=</font> OUTPUT_BUF_SIZE;
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<b>}</b>
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.next_output_byte <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer <font color='#5555FF'>=</font> <font color='#5555FF'>*</font>outbuffer;
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dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.free_in_buffer <font color='#5555FF'>=</font> dest<font color='#5555FF'>-</font><font color='#5555FF'>></font>bufsize <font color='#5555FF'>=</font> <font color='#5555FF'>*</font>outsize;
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<b>}</b>
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</pre></body></html> |
