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still testing...

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This commit is contained in:
Andreas Huggel 2004-01-27 04:27:53 +00:00
parent b872626b2f
commit 7450d04061
1 changed files with 113 additions and 38 deletions
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src/exiftest.cpp
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@ -1,60 +1,135 @@
#include "tags.hpp"
// ***************************************************************** -*- C++ -*-
/*
* Copyright (C) 2004 Andreas Huggel <ahuggel@gmx.net>
*
* This program is part of the Exiv2 distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
Abstract : Sample code to add, modify and delete Exif metadata
Author(s): Andreas Huggel (ahu) <ahuggel@gmx.net>
Version : $Name: $ $Revision: 1.8 $
History : 26-Jan-04, ahu: created
*/
// *****************************************************************************
// included header files
#include "exif.hpp"
#include <iostream>
#include <iomanip>
// *****************************************************************************
// local declarations
using namespace Exif;
void exifPrint(const ExifData& exifData);
int main(int argc, char* const argv[])
{
if (argc != 2) {
std::cout << "Usage: exiftest path\n";
return 1;
}
// *****************************************************************************
// Main
int main()
try {
// ExifData is the container for all metadata
ExifData exifData;
int rc;
// *************************************************************************
// Add metadata to the Exif data
try {
// Add usecase
ExifData ed;
// Create a value of the required type
Value* v = Value::create(asciiString);
// Set the value to a string
v->read("1999:12:31 23:59:59");
// Add the value together with its key to the Exif data container
std::string key = "Image.DateTime.DateTimeOriginal";
exifData.add(key, v);
Value* v1 = Value::create(signedRational);
v1->read("1/2 1/3");
RationalValue* rv = dynamic_cast<RationalValue*>(v1);
if (rv == 0) return -1;
rv->value_.push_back(std::make_pair(2,3));
rv->value_.push_back(std::make_pair(-5,4));
std::string key = "Thumbnail.ImageStructure.Compression";
std::cout << "Added key \"" << key << "\", value \"" << *v << "\"\n";
// Delete the memory allocated by Value::create
delete v;
std::cout << "add(\"" << key << "\", " << *rv << ")\n";
ed.add(key, rv);
delete rv;
// Now create a more interesting value
v = Value::create(unsignedRational);
// Set two rational components from a string
v->read("1/2 1/3");
// Downcast the Value to its actual type
URationalValue* rv = dynamic_cast<URationalValue*>(v);
if (rv == 0) throw Error("Downcast failed");
// Add more elements through the extended interface of the actual type
rv->value_.push_back(std::make_pair(2,3));
rv->value_.push_back(std::make_pair(3,4));
// Add the key and value pair to the Exif data
key = "Image.ImageCharacteristics.PrimaryChromaticities";
exifData.add(key, rv);
key = "Image.DateTime.DateTimeOriginal";
Value* v2 = Value::create(asciiString);
v2->read("1999:12:31 23:59:59\0");
ed.add(key, v2);
std::cout << "add(\"" << key << "\", " << *v2 << ")\n";
delete v2;
std::cout << "Added key \"" << key << "\", value \"" << *v << "\"\n";
// Delete the memory allocated by Value::create
delete v;
// Modify usecase
key = "Image.DateTime.DateTimeOriginal";
ExifData::iterator md = ed.findKey(key);
if (md == ed.end()) return -2;
// *************************************************************************
// Modify Exif data
md->setValue("abcd");
// Find a metadatum by its key
key = "Image.DateTime.DateTimeOriginal";
ExifData::iterator pos = exifData.findKey(key);
if (pos == exifData.end()) throw Error("Key not found");
// Set the new value
pos->setValue("2000:01:01 00:00:00");
// Find another key
key = "Image.ImageCharacteristics.PrimaryChromaticities";
pos = exifData.findKey(key);
if (pos == exifData.end()) throw Error("Key not found");
// Get a pointer to a copy of the value
v = pos->getValue();
// Downcast the Value to its actual type
rv = dynamic_cast<URationalValue*>(v);
if (rv == 0) throw Error("Downcast failed");
// Modify elements through the extended interface of the actual type
rv->value_[2] = std::make_pair(88,77);
// Set the value of the metadatum to the modified value
pos->setValue(rv);
// Delete the memory allocated by getValue
delete v;
exifPrint(ed);
}
catch (Error& e) {
std::cout << "Caught Exif exception '" << e << "'\n";
}
exifPrint(exifData);
return rc;
// *************************************************************************
// Delete metadata from the Exif data container
// Delete a metadatum by its key
key = "Image.DateTime.DateTimeOriginal";
exifData.erase(key);
// Delete the metadatum at iterator position pos
key = "Image.ImageCharacteristics.PrimaryChromaticities";
pos = exifData.findKey(key);
if (pos == exifData.end()) throw Error("Key not found");
exifData.erase(pos);
exifPrint(exifData);
return 0;
}
catch (Error& e) {
std::cout << "Caught Exif exception '" << e << "'\n";
return 1;
}
// *****************************************************************************
// local definitions
void exifPrint(const ExifData& exifData)
{