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11 <h1>examples/PIPS/openclibz/src/uncompress.c</h1><a href="uncompress_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
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12 <a name="l00002"></a>00002 <span class="comment">* ==============================================================================</span> |
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13 <a name="l00003"></a>00003 <span class="comment">* Name : UnCompress.c</span> |
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14 <a name="l00004"></a>00004 <span class="comment">* Part of : OpenCLibz</span> |
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15 <a name="l00005"></a>00005 <span class="comment">* Interface :</span> |
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16 <a name="l00006"></a>00006 <span class="comment">* Description :</span> |
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17 <a name="l00007"></a>00007 <span class="comment">* Version :</span> |
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18 <a name="l00008"></a>00008 <span class="comment">*</span> |
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19 <a name="l00009"></a>00009 <span class="comment">* Copyright (c) 2007 Nokia Corporation.</span> |
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20 <a name="l00010"></a>00010 <span class="comment">* This material, including documentation and any related</span> |
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21 <a name="l00011"></a>00011 <span class="comment">* computer programs, is protected by copyright controlled by</span> |
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22 <a name="l00012"></a>00012 <span class="comment">* Nokia Corporation.</span> |
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23 <a name="l00013"></a>00013 <span class="comment">* ==============================================================================</span> |
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24 <a name="l00014"></a>00014 <span class="comment">*/</span> |
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25 <a name="l00015"></a>00015 |
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26 <a name="l00016"></a>00016 |
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27 <a name="l00021"></a>00021 <span class="preprocessor">#include "<a class="code" href="openclibzheader_8h.html">OpenCLibzheader.h</a>"</span> |
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28 <a name="l00022"></a>00022 |
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29 <a name="l00023"></a>00023 <span class="comment">//</span> |
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30 <a name="l00024"></a>00024 <span class="comment">// In case of any error , display the error message .</span> |
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31 <a name="l00025"></a>00025 <span class="comment">//</span> |
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32 <a name="l00026"></a>00026 <span class="keywordtype">void</span> Error(<span class="keyword">const</span> <span class="keywordtype">char</span> * msg) |
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33 <a name="l00027"></a>00027 { |
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34 <a name="l00028"></a>00028 printf( <span class="stringliteral">" %s\n"</span>, msg); |
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35 <a name="l00029"></a>00029 getchar(); |
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36 <a name="l00030"></a>00030 getchar(); |
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37 <a name="l00031"></a>00031 exit(1); |
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38 <a name="l00032"></a>00032 } |
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39 <a name="l00033"></a>00033 |
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40 <a name="l00034"></a>00034 |
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41 <a name="l00035"></a>00035 |
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42 <a name="l00036"></a>00036 <span class="comment">//Compresses the file using libz api's</span> |
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43 <a name="l00037"></a>00037 |
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44 <a name="l00038"></a>00038 <span class="keywordtype">void</span> GzUnCompress(gzFile in, FILE * out) |
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45 <a name="l00039"></a>00039 |
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46 <a name="l00040"></a>00040 { |
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47 <a name="l00041"></a>00041 <span class="keyword">static</span> <span class="keywordtype">char</span> buf[BUFLEN]; |
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48 <a name="l00042"></a>00042 <span class="keywordtype">int</span> len; |
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49 <a name="l00043"></a>00043 <span class="keywordtype">int</span> err; |
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50 <a name="l00044"></a>00044 |
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51 <a name="l00045"></a>00045 <span class="keywordflow">for</span> (;;) |
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52 <a name="l00046"></a>00046 { |
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53 <a name="l00047"></a>00047 len = gzread(in, buf, <span class="keyword">sizeof</span>(buf)); <span class="comment">//libz api to read a compressed file</span> |
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54 <a name="l00048"></a>00048 <span class="keywordflow">if</span> (len < 0) Error (gzerror(in, &err)); |
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55 <a name="l00049"></a>00049 <span class="keywordflow">if</span> (len == 0) <span class="keywordflow">break</span>; |
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56 <a name="l00050"></a>00050 |
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57 <a name="l00051"></a>00051 <span class="keywordflow">if</span> ((<span class="keywordtype">int</span>)fwrite(buf, 1, (<span class="keywordtype">unsigned</span>)len, out) != len) |
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58 <a name="l00052"></a>00052 { |
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59 <a name="l00053"></a>00053 Error(<span class="stringliteral">"failed fwrite"</span>); |
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60 <a name="l00054"></a>00054 } |
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61 <a name="l00055"></a>00055 } |
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62 <a name="l00056"></a>00056 <span class="keywordflow">if</span> (fclose(out)) Error(<span class="stringliteral">"failed fclose"</span>); |
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63 <a name="l00057"></a>00057 |
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64 <a name="l00058"></a>00058 <span class="keywordflow">if</span> (gzclose(in) != Z_OK) <span class="comment">// libz api to close a compressed file</span> |
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65 <a name="l00059"></a>00059 |
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66 <a name="l00060"></a>00060 Error(<span class="stringliteral">"failed gzclose"</span>); |
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67 <a name="l00061"></a>00061 |
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68 <a name="l00062"></a>00062 |
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69 <a name="l00063"></a>00063 |
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70 <a name="l00064"></a>00064 } |
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71 <a name="l00065"></a>00065 |
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72 <a name="l00066"></a>00066 |
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73 <a name="l00067"></a>00067 |
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74 <a name="l00068"></a>00068 |
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75 <a name="l00069"></a>00069 <span class="comment">//UnCompresses the file using libz api's</span> |
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76 <a name="l00070"></a>00070 |
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77 <a name="l00071"></a>00071 <span class="keywordtype">void</span> FileUnCompress( <span class="keywordtype">char</span> * file ) |
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78 <a name="l00072"></a>00072 |
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79 <a name="l00073"></a>00073 { |
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80 <a name="l00074"></a>00074 <span class="keyword">static</span> <span class="keywordtype">char</span> buf[MAX_NAME_LEN]; |
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81 <a name="l00075"></a>00075 <span class="keywordtype">char</span> *infile, *outfile; |
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82 <a name="l00076"></a>00076 FILE *out; |
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83 <a name="l00077"></a>00077 gzFile in; |
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84 <a name="l00078"></a>00078 <span class="keywordtype">char</span> choice[3]; |
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85 <a name="l00079"></a>00079 uInt len = (uInt)strlen(file); |
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86 <a name="l00080"></a>00080 strcpy(buf, file); |
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87 <a name="l00081"></a>00081 |
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88 <a name="l00082"></a>00082 <span class="keywordflow">if</span> (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) |
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89 <a name="l00083"></a>00083 { |
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90 <a name="l00084"></a>00084 infile = file; |
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91 <a name="l00085"></a>00085 outfile = buf; |
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92 <a name="l00086"></a>00086 outfile[len-3] = <span class="charliteral">'\0'</span>; <span class="comment">//create the output filename</span> |
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93 <a name="l00087"></a>00087 } |
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94 <a name="l00088"></a>00088 <span class="keywordflow">else</span> |
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95 <a name="l00089"></a>00089 { |
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96 <a name="l00090"></a>00090 outfile = file; |
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97 <a name="l00091"></a>00091 infile = buf; |
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98 <a name="l00092"></a>00092 strcat(infile, GZ_SUFFIX); <span class="comment">//create the input filename</span> |
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99 <a name="l00093"></a>00093 } |
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100 <a name="l00094"></a>00094 in = gzopen(infile, <span class="stringliteral">"rb"</span>); <span class="comment">// libz api to open a compressed file</span> |
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101 <a name="l00095"></a>00095 |
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102 <a name="l00096"></a>00096 <span class="keywordflow">if</span> (in == NULL) |
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103 <a name="l00097"></a>00097 { |
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104 <a name="l00098"></a>00098 |
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105 <a name="l00099"></a>00099 Error(<span class="stringliteral">"file not found ...try again \n"</span>); |
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106 <a name="l00100"></a>00100 |
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107 <a name="l00101"></a>00101 } |
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108 <a name="l00102"></a>00102 out = fopen(outfile, <span class="stringliteral">"wb"</span>); <span class="comment">//open the output filename</span> |
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109 <a name="l00103"></a>00103 <span class="keywordflow">if</span> (out == NULL) |
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110 <a name="l00104"></a>00104 { |
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111 <a name="l00105"></a>00105 gzclose(in); <span class="comment">// libz api to close a compressed file</span> |
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112 <a name="l00106"></a>00106 } |
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113 <a name="l00107"></a>00107 |
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114 <a name="l00108"></a>00108 GzUnCompress(in, out); |
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115 <a name="l00109"></a>00109 |
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116 <a name="l00110"></a>00110 printf(<span class="stringliteral">"do you want to delete the original file (y /n) \n"</span>); |
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117 <a name="l00111"></a>00111 |
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118 <a name="l00112"></a>00112 scanf(<span class="stringliteral">"%s"</span>,choice); |
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119 <a name="l00113"></a>00113 |
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120 <a name="l00114"></a>00114 <span class="keywordflow">if</span>(choice[0] == <span class="charliteral">'y'</span>) |
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121 <a name="l00115"></a>00115 unlink(file); |
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122 <a name="l00116"></a>00116 printf(<span class="stringliteral">" Congrats .... uncompression done ...u can find uncompressed file in the same directory as of the source file\n"</span>); |
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123 <a name="l00117"></a>00117 |
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124 <a name="l00118"></a>00118 } |
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125 <a name="l00119"></a>00119 |
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126 <a name="l00120"></a>00120 <span class="comment">/* End of File */</span> |
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127 </pre></div></div> |
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