// This is weird because iptc and exif have not been "unified". Once
// they are unified, this DLL should not have to know
// about either... just generic images, keys, values, etc.
//
// buffsize should be the total size of *buff (including space for null)
// Note that if there is more than one entry (for some IPTC datasets) this
// returns the first one found. Currently no way to get the others.
// Returns 0 on success
EXIVSIMPLE_API int ReadMeta(HIMAGE img, const char *key, char *buff, int buffsize)
{
assert(img && key && buff);
if (img==0 || key==0 || buff==0 || buffsize==0) return -1;
ImageWrapper *imgWrap = (ImageWrapper*)img;
int rc = 2;
Exiv2::IptcData &iptcData = imgWrap->image->iptcData();
Exiv2::ExifData &exifData = imgWrap->image->exifData();
try {
// First try iptc
Exiv2::IptcKey iptcKey(key);
rc = 1;
Exiv2::IptcData::const_iterator iter = iptcData.findKey(iptcKey);
if (iter != iptcData.end()) {
strncpy(buff, iter->value().toString().c_str(), buffsize);
buff[buffsize-1] = 0;
rc = 0;
}
}
catch(const Exiv2::AnyError&) {
}
if (rc) {
// No iptc value, so try exif
try {
Exiv2::ExifKey exifKey(key);
rc = 1;
Exiv2::ExifData::const_iterator iter = exifData.findKey(exifKey);
if (iter != exifData.end()) {
strncpy(buff, iter->value().toString().c_str(), buffsize);
buff[buffsize-1] = 0;
rc = 0;
}
}
catch(const Exiv2::AnyError&) {
}
}
return rc;
}
EXIVSIMPLE_API int EnumMeta(HIMAGE img, METAENUMPROC proc, void *user)
{
assert(img && proc);
if (img==0 || proc==0) return -1;
ImageWrapper *imgWrap = (ImageWrapper*)img;
bool more = true;
Exiv2::IptcData &iptcData = imgWrap->image->iptcData();
Exiv2::ExifData &exifData = imgWrap->image->exifData();
Exiv2::IptcData::const_iterator iend = iptcData.end();
for (Exiv2::IptcData::const_iterator i = iptcData.begin();
i != iend && more; ++i) {
more = proc(i->key().c_str(), i->value().toString().c_str(), user);
}
Exiv2::ExifData::const_iterator eend = exifData.end();
for (Exiv2::ExifData::const_iterator e = exifData.begin();
e != eend && more; ++e) {
more = proc(e->key().c_str(), e->value().toString().c_str(), user);
}
return 0;
}