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diff --git a/doc/api-documentation/html/zipcomprs_8cpp-source.html b/doc/api-documentation/html/zipcomprs_8cpp-source.html new file mode 100644 index 0000000..91e157e --- /dev/null +++ b/doc/api-documentation/html/zipcomprs_8cpp-source.html @@ -0,0 +1,172 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> +<title>zipcomprs.cpp Source File</title> +<link href="doxygen.css" rel="stylesheet" type="text/css"> +</head><body> +<!-- Generated by Doxygen 1.2.15 --> +<center> +<a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="namespaces.html">Namespace List</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="classes.html">Alphabetical List</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="functions.html">Compound Members</a> </center> +<hr><h1>zipcomprs.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/******************************************************************************</font> +00002 <font class="comment"> * swcomprs.cpp - code for class 'ZipCompress'- a driver class that provides</font> +00003 <font class="comment"> * compression utilities. - using zlib</font> +00004 <font class="comment"> */</font> +00005 +00006 <font class="preprocessor">#include <string.h></font> +00007 <font class="preprocessor">#include <string></font> +00008 <font class="preprocessor">#include <stdlib.h></font> +00009 <font class="preprocessor">#include <stdio.h></font> +00010 <font class="preprocessor">#include <zipcomprs.h></font> +00011 <font class="preprocessor">#include <zlib.h></font> +00012 +00013 <font class="comment">/******************************************************************************</font> +00014 <font class="comment"> * ZipCompress Constructor - Initializes data for instance of ZipCompress</font> +00015 <font class="comment"> *</font> +00016 <font class="comment"> */</font> +00017 +00018 ZipCompress::ZipCompress() : SWCompress() +00019 { +00020 <font class="comment">// fprintf(stderr, "init compress\n");</font> +00021 } +00022 +00023 +00024 <font class="comment">/******************************************************************************</font> +00025 <font class="comment"> * ZipCompress Destructor - Cleans up instance of ZipCompress</font> +00026 <font class="comment"> */</font> +00027 +00028 ZipCompress::~ZipCompress() { +00029 } +00030 +00031 +00032 <font class="comment">/******************************************************************************</font> +00033 <font class="comment"> * ZipCompress::Encode - This function "encodes" the input stream into the</font> +00034 <font class="comment"> * output stream.</font> +00035 <font class="comment"> * The GetChars() and SendChars() functions are</font> +00036 <font class="comment"> * used to separate this method from the actual</font> +00037 <font class="comment"> * i/o.</font> +00038 <font class="comment"> * NOTE: must set zlen for parent class to know length of</font> +00039 <font class="comment"> * compressed buffer.</font> +00040 <font class="comment"> */</font> +00041 +00042 <font class="keywordtype">void</font> ZipCompress::Encode(<font class="keywordtype">void</font>) +00043 { +00044 <font class="comment">/*</font> +00045 <font class="comment">ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,</font> +00046 <font class="comment"> const Bytef *source, uLong sourceLen));</font> +00047 <font class="comment"> Compresses the source buffer into the destination buffer. sourceLen is</font> +00048 <font class="comment"> the byte length of the source buffer. Upon entry, destLen is the total</font> +00049 <font class="comment"> size of the destination buffer, which must be at least 0.1% larger than</font> +00050 <font class="comment"> sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the</font> +00051 <font class="comment"> compressed buffer.</font> +00052 <font class="comment"> This function can be used to compress a whole file at once if the</font> +00053 <font class="comment"> input file is mmap'ed.</font> +00054 <font class="comment"> compress returns Z_OK if success, Z_MEM_ERROR if there was not</font> +00055 <font class="comment"> enough memory, Z_BUF_ERROR if there was not enough room in the output</font> +00056 <font class="comment"> buffer.</font> +00057 <font class="comment">*/</font> +00058 direct = 0; <font class="comment">// set direction needed by parent [Get|Send]Chars()</font> +00059 +00060 <font class="comment">// get buffer</font> +00061 <font class="keywordtype">char</font> chunk[1024]; +00062 <font class="keywordtype">char</font> *buf = (<font class="keywordtype">char</font> *)calloc(1, 1024); +00063 <font class="keywordtype">char</font> *chunkbuf = buf; +00064 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> chunklen; +00065 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> len = 0; +00066 <font class="keywordflow">while</font>((chunklen = GetChars(chunk, 1023))) { +00067 memcpy(chunkbuf, chunk, chunklen); +00068 len += chunklen; +00069 <font class="keywordflow">if</font> (chunklen < 1023) +00070 <font class="keywordflow">break</font>; +00071 <font class="keywordflow">else</font> buf = (<font class="keywordtype">char</font> *)realloc(buf, len + 1024); +00072 chunkbuf = buf+len; +00073 } +00074 +00075 +00076 zlen = (long) (len*1.001)+15; +00077 <font class="keywordtype">char</font> *zbuf = <font class="keyword">new</font> <font class="keywordtype">char</font>[zlen+1]; +00078 <font class="keywordflow">if</font> (len) +00079 { +00080 <font class="comment">//printf("Doing compress\n");</font> +00081 <font class="keywordflow">if</font> (compress((Bytef*)zbuf, &zlen, (<font class="keyword">const</font> Bytef*)buf, len)!=Z_OK) +00082 { +00083 printf(<font class="stringliteral">"ERROR in compression\n"</font>); +00084 } +00085 <font class="keywordflow">else</font> { +00086 SendChars(zbuf, zlen); +00087 } +00088 } +00089 <font class="keywordflow">else</font> +00090 { +00091 fprintf(stderr, <font class="stringliteral">"No buffer to compress\n"</font>); +00092 } +00093 <font class="keyword">delete</font> [] zbuf; +00094 free (buf); +00095 } +00096 +00097 +00098 <font class="comment">/******************************************************************************</font> +00099 <font class="comment"> * ZipCompress::Decode - This function "decodes" the input stream into the</font> +00100 <font class="comment"> * output stream.</font> +00101 <font class="comment"> * The GetChars() and SendChars() functions are</font> +00102 <font class="comment"> * used to separate this method from the actual</font> +00103 <font class="comment"> * i/o.</font> +00104 <font class="comment"> */</font> +00105 +00106 <font class="keywordtype">void</font> ZipCompress::Decode(<font class="keywordtype">void</font>) +00107 { +00108 <font class="comment">/*</font> +00109 <font class="comment">ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,</font> +00110 <font class="comment"> const Bytef *source, uLong sourceLen));</font> +00111 <font class="comment"> Decompresses the source buffer into the destination buffer. sourceLen is</font> +00112 <font class="comment"> the byte length of the source buffer. Upon entry, destLen is the total</font> +00113 <font class="comment"> size of the destination buffer, which must be large enough to hold the</font> +00114 <font class="comment"> entire uncompressed data. (The size of the uncompressed data must have</font> +00115 <font class="comment"> been saved previously by the compressor and transmitted to the decompressor</font> +00116 <font class="comment"> by some mechanism outside the scope of this compression library.)</font> +00117 <font class="comment"> Upon exit, destLen is the actual size of the compressed buffer.</font> +00118 <font class="comment"> This function can be used to decompress a whole file at once if the</font> +00119 <font class="comment"> input file is mmap'ed.</font> +00120 <font class="comment"></font> +00121 <font class="comment"> uncompress returns Z_OK if success, Z_MEM_ERROR if there was not</font> +00122 <font class="comment"> enough memory, Z_BUF_ERROR if there was not enough room in the output</font> +00123 <font class="comment"> buffer, or Z_DATA_ERROR if the input data was corrupted.</font> +00124 <font class="comment">*/</font> +00125 +00126 <font class="comment">// get buffer</font> +00127 <font class="keywordtype">char</font> chunk[1024]; +00128 <font class="keywordtype">char</font> *zbuf = (<font class="keywordtype">char</font> *)calloc(1, 1024); +00129 <font class="keywordtype">char</font> *chunkbuf = zbuf; +00130 <font class="keywordtype">int</font> chunklen; +00131 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> zlen = 0; +00132 <font class="keywordflow">while</font>((chunklen = GetChars(chunk, 1023))) { +00133 memcpy(chunkbuf, chunk, chunklen); +00134 zlen += chunklen; +00135 <font class="keywordflow">if</font> (chunklen < 1023) +00136 <font class="keywordflow">break</font>; +00137 <font class="keywordflow">else</font> zbuf = (<font class="keywordtype">char</font> *)realloc(zbuf, zlen + 1024); +00138 chunkbuf = zbuf + zlen; +00139 } +00140 +00141 <font class="comment">//printf("Decoding complength{%ld} uncomp{%ld}\n", zlen, blen);</font> +00142 <font class="keywordflow">if</font> (zlen) { +00143 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> blen = zlen*20; <font class="comment">// trust compression is less than 1000%</font> +00144 <font class="keywordtype">char</font> *buf = <font class="keyword">new</font> <font class="keywordtype">char</font>[blen]; +00145 <font class="comment">//printf("Doing decompress {%s}\n", zbuf);</font> +00146 <font class="keywordflow">if</font> (uncompress((Bytef*)buf, &blen, (Bytef*)zbuf, zlen) != Z_OK) { +00147 fprintf(stderr, <font class="stringliteral">"no room in outbuffer to during decompression. see zipcomp.cpp\n"</font>); +00148 } +00149 SendChars(buf, blen); +00150 <font class="keyword">delete</font> [] buf; +00151 slen = blen; +00152 } +00153 <font class="keywordflow">else</font> { +00154 fprintf(stderr, <font class="stringliteral">"No buffer to decompress!\n"</font>); +00155 } +00156 <font class="comment">//printf("Finished decoding\n");</font> +00157 free (zbuf); +00158 } +</pre></div><hr><address align="right"><small>Generated on Thu Jun 20 22:13:01 2002 for The Sword Project by +<a href="http://www.doxygen.org/index.html"> +<img src="doxygen.png" alt="doxygen" align="middle" border=0 +width=110 height=53></a>1.2.15 </small></address> +</body> +</html> |