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<h1>exifprint.cpp</h1>Sample program to print Exif data from an image.<p>
<div class="fragment"><pre class="fragment"><span class="comment">// ***************************************************************** -*- C++ -*-</span>
<span class="comment">// exifprint.cpp, $Rev: 1757 $</span>
<span class="comment">// Sample program to print the Exif metadata of an image</span>
<span class="preprocessor">#include <exiv2/image.hpp></span>
<span class="preprocessor">#include <exiv2/exif.hpp></span>
<span class="preprocessor">#include <iostream></span>
<span class="preprocessor">#include <iomanip></span>
<span class="preprocessor">#include <cassert></span>
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>* <span class="keyword">const</span> argv[])
<span class="keyword">try</span> {
<span class="keywordflow">if</span> (argc != 2) {
std::cout << <span class="stringliteral">"Usage: "</span> << argv[0] << <span class="stringliteral">" file\n"</span>;
<span class="keywordflow">return</span> 1;
}
<a class="code" href="classExiv2_1_1Image.html#89ad3ffe7a4e8a943d267d77843415fb" title="Image auto_ptr type.">Exiv2::Image::AutoPtr</a> image = <a name="a0"></a><a class="code" href="classExiv2_1_1ImageFactory.html#981013bdf0d31ec7f64f0f6339fe323e" title="Create an Image subclass of the appropriate type by reading the specified file. Image...">Exiv2::ImageFactory::open</a>(argv[1]);
assert(image.get() != 0);
image->readMetadata();
<a name="_a1"></a><a class="code" href="classExiv2_1_1ExifData.html" title="A container for Exif data. This is a top-level class of the Exiv2 library. The container...">Exiv2::ExifData</a> &exifData = image->exifData();
<span class="keywordflow">if</span> (exifData.<a name="a2"></a><a class="code" href="classExiv2_1_1ExifData.html#4993c68fbb50731014c307852875c731" title="Return true if there is no Exif metadata.">empty</a>()) {
<a name="a3"></a><a class="code" href="namespaceExiv2.html#5153319711f35fe81cbc13f4b852450c2d79fb07c9ec891f281968dad43c1e25" title="IPTC string type.">std::string</a> error(argv[1]);
error += <span class="stringliteral">": No Exif data found in the file"</span>;
<span class="keywordflow">throw</span> <a name="_a4"></a><a class="code" href="classExiv2_1_1Error.html" title="Simple error class used for exceptions. An output operator is provided to print errors...">Exiv2::Error</a>(1, error);
}
<a class="code" href="classExiv2_1_1ExifData.html#2b8ac7a474d6527c0f3f6a0a9cebef77" title="ExifMetadata const iterator type.">Exiv2::ExifData::const_iterator</a> end = exifData.<a name="a5"></a><a class="code" href="classExiv2_1_1ExifData.html#9c15177b03489e3d4bb81e9acc1165fe" title="End of the metadata.">end</a>();
<span class="keywordflow">for</span> (<a class="code" href="classExiv2_1_1ExifData.html#2b8ac7a474d6527c0f3f6a0a9cebef77" title="ExifMetadata const iterator type.">Exiv2::ExifData::const_iterator</a> i = exifData.<a name="a6"></a><a class="code" href="classExiv2_1_1ExifData.html#53bce2980ee060fc2da5fe6751f51db9" title="Begin of the metadata.">begin</a>(); i != end; ++i) {
<span class="keyword">const</span> <span class="keywordtype">char</span>* tn = i->typeName();
std::cout << std::setw(44) << std::setfill(<span class="charliteral">' '</span>) << std::left
<< i->key() << <span class="stringliteral">" "</span>
<< <span class="stringliteral">"0x"</span> << std::setw(4) << std::setfill(<span class="charliteral">'0'</span>) << std::right
<< std::hex << i->tag() << <span class="stringliteral">" "</span>
<< std::setw(9) << std::setfill(<span class="charliteral">' '</span>) << std::left
<< (tn ? tn : <span class="stringliteral">"Unknown"</span>) << <span class="stringliteral">" "</span>
<< std::dec << std::setw(3)
<< std::setfill(<span class="charliteral">' '</span>) << std::right
<< i->count() << <span class="stringliteral">" "</span>
<< std::dec << i->value()
<< <span class="stringliteral">"\n"</span>;
}
<span class="keywordflow">return</span> 0;
}
<span class="keywordflow">catch</span> (<a name="_a7"></a><a class="code" href="classExiv2_1_1AnyError.html" title="Error class interface. Allows the definition and use of a hierarchy of error classes...">Exiv2::AnyError</a>& e) {
std::cout << <span class="stringliteral">"Caught Exiv2 exception '"</span> << e << <span class="stringliteral">"'\n"</span>;
<span class="keywordflow">return</span> -1;
}
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