diff --git a/app/actions.cpp b/app/actions.cpp
index 2fecfc97..98f6bb9a 100644
--- a/app/actions.cpp
+++ b/app/actions.cpp
@@ -171,12 +171,12 @@ int setModeAndPrintStructure(Exiv2::PrintStructureOption option, const std::stri
     std::stringstream output(std::stringstream::out | std::stringstream::binary);
     result = printStructure(output, option, path);
     if (result == 0) {
-      size_t size = output.str().size();
-      Exiv2::DataBuf iccProfile(size);
-      Exiv2::DataBuf ascii(size * 3 + 1);
-      ascii.write_uint8(size * 3, 0);
-      iccProfile.copyBytes(0, output.str().c_str(), size);
-      if (Exiv2::base64encode(iccProfile.c_data(), size, reinterpret_cast<char*>(ascii.data()), size * 3)) {
+      std::string str = output.str();
+      Exiv2::DataBuf iccProfile(str.size());
+      Exiv2::DataBuf ascii(str.size() * 3 + 1);
+      ascii.write_uint8(str.size() * 3, 0);
+      std::copy(str.begin(), str.end(), iccProfile.begin());
+      if (Exiv2::base64encode(iccProfile.c_data(), str.size(), reinterpret_cast<char*>(ascii.data()), str.size() * 3)) {
         long chunk = 60;
         std::string code = std::string("data:") + ascii.c_str();
         size_t length = code.size();
diff --git a/app/exiv2.cpp b/app/exiv2.cpp
index 14016f20..4421c29f 100644
--- a/app/exiv2.cpp
+++ b/app/exiv2.cpp
@@ -12,6 +12,7 @@
 #include "i18n.h"  // NLS support.
 #include "xmp_exiv2.hpp"
 
+#include <algorithm>
 #include <cctype>
 #include <cstring>
 #include <fstream>
@@ -941,20 +942,20 @@ static int readFileToBuf(FILE* f, Exiv2::DataBuf& buf) {
   std::vector<Exiv2::byte> bytes(buff_size);
   int nBytes = 0;
   bool more{true};
+  std::array<char, buff_size> buff;
   while (more) {
-    char buff[buff_size];
-    auto n = static_cast<int>(fread(buff, 1, buff_size, f));
+    auto n = fread(buff.data(), 1, buff_size, f);
     more = n > 0;
     if (more) {
       bytes.resize(nBytes + n);
-      memcpy(bytes.data() + nBytes, buff, n);
+      std::copy_n(buff.begin(), n, bytes.begin() + nBytes);
       nBytes += n;
     }
   }
 
   if (nBytes) {
     buf.alloc(nBytes);
-    buf.copyBytes(0, bytes.data(), nBytes);
+    std::copy(bytes.begin(), bytes.end(), buf.begin());
   }
   return nBytes;
 }
@@ -1004,7 +1005,7 @@ void Params::getStdin(Exiv2::DataBuf& buf) {
   // copy stdinBuf to buf
   if (!stdinBuf.empty()) {
     buf.alloc(stdinBuf.size());
-    buf.copyBytes(0, stdinBuf.c_data(), buf.size());
+    std::copy(stdinBuf.begin(), stdinBuf.end(), buf.begin());
   }
 #ifdef DEBUG
   std::cerr << "getStdin stdinBuf.size_ = " << stdinBuf.size() << std::endl;
diff --git a/include/exiv2/types.hpp b/include/exiv2/types.hpp
index 23970527..30743fdc 100644
--- a/include/exiv2/types.hpp
+++ b/include/exiv2/types.hpp
@@ -198,9 +198,6 @@ struct EXIV2API DataBuf {
   uint64_t read_uint64(size_t offset, ByteOrder byteOrder) const;
   void write_uint64(size_t offset, uint64_t x, ByteOrder byteOrder);
 
-  //! Copy bytes into the buffer (starting at address &pData_[offset]).
-  void copyBytes(size_t offset, const void* buf, size_t bufsize);
-
   //! Equivalent to: memcmp(&pData_[offset], buf, bufsize)
   int cmpBytes(size_t offset, const void* buf, size_t bufsize) const;
 
diff --git a/include/exiv2/value.hpp b/include/exiv2/value.hpp
index 051050ab..012be3bb 100644
--- a/include/exiv2/value.hpp
+++ b/include/exiv2/value.hpp
@@ -10,10 +10,10 @@
 #include "types.hpp"
 
 // + standard includes
+#include <cmath>
 #include <cstring>
 #include <iomanip>
 #include <map>
-#include <cmath>
 
 // *****************************************************************************
 // namespace extensions
diff --git a/samples/mmap-test.cpp b/samples/mmap-test.cpp
index e76b59ba..270c4aac 100644
--- a/samples/mmap-test.cpp
+++ b/samples/mmap-test.cpp
@@ -28,13 +28,16 @@ int main(int argc, char* const argv[]) {
     }
     // Map it to memory
     const Exiv2::byte* pData = file.mmap();
-    DataBuf buf(file.size());
+    std::vector<byte> buf(file.size());
+
     // Read from the memory mapped region
-    buf.copyBytes(0, pData, buf.size());
+    std::copy_n(pData, buf.size(), buf.begin());
+
     // Reopen file in write mode and write to it
-    file.write(buf.c_data(), buf.size());
+    file.write(buf.data(), buf.size());
+
     // Read from the mapped region again
-    buf.copyBytes(0, pData, buf.size());
+    std::copy_n(pData, buf.size(), buf.begin());
     file.close();
 
     return EXIT_SUCCESS;
diff --git a/src/cr2header_int.cpp b/src/cr2header_int.cpp
index ecb341b6..7b2ffbd1 100644
--- a/src/cr2header_int.cpp
+++ b/src/cr2header_int.cpp
@@ -44,7 +44,7 @@ DataBuf Cr2Header::write() const {
 
   buf.write_uint16(2, tag(), byteOrder());
   buf.write_uint32(4, 0x00000010, byteOrder());
-  buf.copyBytes(8, cr2sig_, 4);
+  std::copy_n(cr2sig_, 4, buf.begin() + 8);
   // Write a dummy value for the RAW IFD offset. The offset-writer is used to set this offset in a second pass.
   buf.write_uint32(12, 0x00000000, byteOrder());
   return buf;
diff --git a/src/crwimage_int.cpp b/src/crwimage_int.cpp
index c0a707c1..e807f9f9 100644
--- a/src/crwimage_int.cpp
+++ b/src/crwimage_int.cpp
@@ -874,7 +874,7 @@ void CrwMap::encode0x0805(const Image& image, const CrwMapping* pCrwMapping, Cif
     if (cc && cc->size() > size)
       size = cc->size();
     DataBuf buf(size);
-    buf.copyBytes(0, comment.data(), comment.size());
+    std::copy(comment.begin(), comment.end(), buf.begin());
     pHead->add(pCrwMapping->crwTagId_, pCrwMapping->crwDir_, std::move(buf));
   } else {
     if (cc) {
@@ -984,7 +984,7 @@ void CrwMap::encode0x1810(const Image& image, const CrwMapping* pCrwMapping, Cif
     }
     DataBuf buf(size);
     if (cc)
-      buf.copyBytes(8, cc->pData() + 8, cc->size() - 8);
+      std::copy_n(cc->pData() + 8, cc->size() - 8, buf.begin() + 8);
     if (edX != edEnd && edX->size() == 4) {
       edX->copy(buf.data(), pHead->byteOrder());
     }
diff --git a/src/image.cpp b/src/image.cpp
index b8303358..f2d5873e 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -361,8 +361,8 @@ void Image::printIFDStructure(BasicIo& io, std::ostream& out, Exiv2::PrintStruct
       }
       // Overflow check
       enforce(allocate64 <= std::numeric_limits<size_t>::max(), ErrorCode::kerCorruptedMetadata);
-      DataBuf buf(allocate64);             // allocate a buffer
-      buf.copyBytes(0, dir.c_data(8), 4);  // copy dir[8:11] into buffer (short strings)
+      DataBuf buf(allocate64);                     // allocate a buffer
+      std::copy_n(dir.c_data(8), 4, buf.begin());  // copy dir[8:11] into buffer (short strings)
 
       // We have already checked that this multiplication cannot overflow.
       const size_t count_x_size = count * size;
diff --git a/src/image_int.cpp b/src/image_int.cpp
index 6c498c3d..df6420c3 100644
--- a/src/image_int.cpp
+++ b/src/image_int.cpp
@@ -25,7 +25,7 @@ std::string stringFormat(const char* format, ...) {
     va_list args;            // variable arg list
     va_start(args, format);  // args start after format
     rc = vsnprintf(&buffer[0], buffer.size(), format, args);
-    va_end(args);     // free the args
+    va_end(args);  // free the args
     if (rc > 0)
       need = static_cast<size_t>(rc);
   } while (buffer.size() <= need);
diff --git a/src/jp2image.cpp b/src/jp2image.cpp
index 7c977fc8..189ed2ea 100644
--- a/src/jp2image.cpp
+++ b/src/jp2image.cpp
@@ -16,6 +16,7 @@
 #include "tiffimage.hpp"
 #include "types.hpp"
 
+#include <algorithm>
 #include <array>
 #include <iostream>
 
@@ -224,7 +225,7 @@ void Jp2Image::readMetadata() {
               throw Error(ErrorCode::kerCorruptedMetadata);
             }
             DataBuf icc(iccLength);
-            icc.copyBytes(0, data.c_data(pad), icc.size());
+            std::copy_n(data.c_data(pad), icc.size(), icc.begin());
 #ifdef EXIV2_DEBUG_MESSAGES
             const char* iccPath = "/tmp/libexiv2_jp2.icc";
             FILE* f = fopen(iccPath, "wb");
@@ -645,8 +646,8 @@ void Jp2Image::encodeJp2Header(const DataBuf& boxBuf, DataBuf& outBuf) {
         enforce(newlen <= output.size() - outlen, ErrorCode::kerCorruptedMetadata);
         ul2Data(reinterpret_cast<byte*>(&newBox.length), psize, bigEndian);
         ul2Data(reinterpret_cast<byte*>(&newBox.type), newBox.type, bigEndian);
-        output.copyBytes(outlen, &newBox, sizeof(newBox));
-        output.copyBytes(outlen + sizeof(newBox), pad, psize);
+        std::copy_n(reinterpret_cast<char*>(&newBox), sizeof(newBox), output.begin() + outlen);
+        std::copy_n(pad, psize, output.begin() + outlen + sizeof(newBox));
       } else {
         const char* pad = "\x02\x00\x00";
         uint32_t psize = 3;
@@ -654,13 +655,13 @@ void Jp2Image::encodeJp2Header(const DataBuf& boxBuf, DataBuf& outBuf) {
         enforce(newlen <= output.size() - outlen, ErrorCode::kerCorruptedMetadata);
         ul2Data(reinterpret_cast<byte*>(&newBox.length), static_cast<uint32_t>(newlen), bigEndian);
         ul2Data(reinterpret_cast<byte*>(&newBox.type), newBox.type, bigEndian);
-        output.copyBytes(outlen, &newBox, sizeof(newBox));
-        output.copyBytes(outlen + sizeof(newBox), pad, psize);
-        output.copyBytes(outlen + sizeof(newBox) + psize, iccProfile_.c_data(), iccProfile_.size());
+        std::copy_n(reinterpret_cast<char*>(&newBox), sizeof(newBox), output.begin() + outlen);
+        std::copy_n(pad, psize, output.begin() + outlen + sizeof(newBox));
+        std::copy(iccProfile_.begin(), iccProfile_.end(), output.begin() + outlen + sizeof(newBox) + psize);
       }
     } else {
       enforce(newlen <= output.size() - outlen, ErrorCode::kerCorruptedMetadata);
-      output.copyBytes(outlen, boxBuf.c_data(inlen), subBox.length);
+      std::copy_n(boxBuf.c_data(inlen), subBox.length, output.begin() + outlen);
     }
 
     outlen += newlen;
@@ -669,7 +670,7 @@ void Jp2Image::encodeJp2Header(const DataBuf& boxBuf, DataBuf& outBuf) {
 
   // allocate the correct number of bytes, copy the data and update the box header
   outBuf.alloc(outlen);
-  outBuf.copyBytes(0, output.c_data(), outlen);
+  std::copy_n(output.c_data(), outlen, outBuf.begin());
   auto oBox = reinterpret_cast<Internal::Jp2BoxHeader*>(outBuf.data());
   ul2Data(reinterpret_cast<byte*>(&oBox->type), kJp2BoxTypeHeader, bigEndian);
   ul2Data(reinterpret_cast<byte*>(&oBox->length), static_cast<uint32_t>(outlen), bigEndian);
@@ -743,8 +744,8 @@ void Jp2Image::doWriteMetadata(BasicIo& outIo) {
     enforce(box.length - 8 <= static_cast<size_t>(io_->size() - io_->tell()), ErrorCode::kerCorruptedMetadata);
 
     // Read whole box : Box header + Box data (not fixed size - can be null).
-    DataBuf boxBuf(box.length);                   // Box header (8 bytes) + box data.
-    boxBuf.copyBytes(0, bheaderBuf.c_data(), 8);  // Copy header.
+    DataBuf boxBuf(box.length);                          // Box header (8 bytes) + box data.
+    std::copy_n(bheaderBuf.begin(), 8, boxBuf.begin());  // Copy header.
     io_->readOrThrow(boxBuf.data(8), box.length - 8, ErrorCode::kerInputDataReadFailed);  // Extract box data.
 
     switch (box.type) {
@@ -767,15 +768,15 @@ void Jp2Image::doWriteMetadata(BasicIo& outIo) {
           ExifParser::encode(blob, littleEndian, exifData_);
           if (!blob.empty()) {
             DataBuf rawExif(blob.size());
-            rawExif.copyBytes(0, &blob[0], blob.size());
+            std::copy(blob.begin(), blob.end(), rawExif.begin());
 
             DataBuf boxData(8 + 16 + rawExif.size());
             ul2Data(boxDataSize, static_cast<uint32_t>(boxData.size()), bigEndian);
             ul2Data(boxUUIDtype, kJp2BoxTypeUuid, bigEndian);
-            boxData.copyBytes(0, boxDataSize, 4);
-            boxData.copyBytes(4, boxUUIDtype, 4);
-            boxData.copyBytes(8, kJp2UuidExif, 16);
-            boxData.copyBytes(8 + 16, rawExif.c_data(), rawExif.size());
+            std::copy_n(boxDataSize, 4, boxData.begin());
+            std::copy_n(boxUUIDtype, 4, boxData.begin() + 4);
+            std::copy_n(kJp2UuidExif, 16, boxData.begin() + 8);
+            std::copy(rawExif.begin(), rawExif.end(), boxData.begin() + 8 + 16);
 
 #ifdef EXIV2_DEBUG_MESSAGES
             std::cout << "Exiv2::Jp2Image::doWriteMetadata: Write box with Exif metadata (length: " << boxData.size()
@@ -794,10 +795,10 @@ void Jp2Image::doWriteMetadata(BasicIo& outIo) {
             DataBuf boxData(8 + 16 + rawIptc.size());
             ul2Data(boxDataSize, static_cast<uint32_t>(boxData.size()), bigEndian);
             ul2Data(boxUUIDtype, kJp2BoxTypeUuid, bigEndian);
-            boxData.copyBytes(0, boxDataSize, 4);
-            boxData.copyBytes(4, boxUUIDtype, 4);
-            boxData.copyBytes(8, kJp2UuidIptc, 16);
-            boxData.copyBytes(8 + 16, rawIptc.c_data(), rawIptc.size());
+            std::copy_n(boxDataSize, 4, boxData.begin());
+            std::copy_n(boxUUIDtype, 4, boxData.begin() + 4);
+            std::copy_n(kJp2UuidExif, 16, boxData.begin() + 8);
+            std::copy(rawIptc.begin(), rawIptc.end(), boxData.begin() + 8 + 16);
 
 #ifdef EXIV2_DEBUG_MESSAGES
             std::cout << "Exiv2::Jp2Image::doWriteMetadata: Write box with Iptc metadata (length: " << boxData.size()
@@ -822,10 +823,10 @@ void Jp2Image::doWriteMetadata(BasicIo& outIo) {
           DataBuf boxData(8 + 16 + xmp.size());
           ul2Data(boxDataSize, static_cast<uint32_t>(boxData.size()), bigEndian);
           ul2Data(boxUUIDtype, kJp2BoxTypeUuid, bigEndian);
-          boxData.copyBytes(0, boxDataSize, 4);
-          boxData.copyBytes(4, boxUUIDtype, 4);
-          boxData.copyBytes(8, kJp2UuidXmp, 16);
-          boxData.copyBytes(8 + 16, xmp.c_data(), xmp.size());
+          std::copy_n(boxDataSize, 4, boxData.begin());
+          std::copy_n(boxUUIDtype, 4, boxData.begin() + 4);
+          std::copy_n(kJp2UuidExif, 16, boxData.begin() + 8);
+          std::copy(xmp.begin(), xmp.end(), boxData.begin() + 8 + 16);
 
 #ifdef EXIV2_DEBUG_MESSAGES
           std::cout << "Exiv2::Jp2Image::doWriteMetadata: Write box with XMP metadata (length: " << boxData.size()
diff --git a/src/jpgimage.cpp b/src/jpgimage.cpp
index e0dfde8e..4b016522 100644
--- a/src/jpgimage.cpp
+++ b/src/jpgimage.cpp
@@ -272,11 +272,11 @@ void JpegBase::readMetadata() {
 
   while (marker != sos_ && marker != eoi_ && search > 0) {
     // 2-byte buffer for reading the size.
-    byte sizebuf[2];
+    std::array<byte, 2> sizebuf;
     uint16_t size = 0;  // Size of the segment, including the 2-byte size field
     if (markerHasLength(marker)) {
-      io_->readOrThrow(sizebuf, 2, ErrorCode::kerFailedToReadImageData);
-      size = getUShort(sizebuf, bigEndian);
+      io_->readOrThrow(sizebuf.data(), sizebuf.size(), ErrorCode::kerFailedToReadImageData);
+      size = getUShort(sizebuf.data(), bigEndian);
       enforce(size >= 2, ErrorCode::kerFailedToReadImageData);
     }
 
@@ -285,7 +285,7 @@ void JpegBase::readMetadata() {
     /// \todo check if it makes sense to check for size
     if (size > 0) {
       io_->readOrThrow(buf.data(2), size - 2, ErrorCode::kerFailedToReadImageData);
-      buf.copyBytes(0, sizebuf, 2);
+      std::copy(sizebuf.begin(), sizebuf.end(), buf.begin());
     }
 
     if (!foundExifData && marker == app1_ && size >= 8  // prevent out-of-bounds read in memcmp on next line
@@ -363,9 +363,9 @@ void JpegBase::readMetadata() {
 
       DataBuf profile(Safe::add(iccProfile_.size(), icc_size));
       if (!iccProfile_.empty()) {
-        profile.copyBytes(0, iccProfile_.c_data(), iccProfile_.size());
+        std::copy(iccProfile_.begin(), iccProfile_.end(), profile.begin());
       }
-      profile.copyBytes(iccProfile_.size(), buf.c_data(2 + 14), icc_size);
+      std::copy_n(buf.c_data(2 + 14), icc_size, profile.data() + iccProfile_.size());
       setIccProfile(std::move(profile), chunk == chunks);
     } else if (pixelHeight_ == 0 && inRange2(marker, sof0_, sof3_, sof5_, sof15_)) {
       // We hit a SOFn (start-of-frame) marker
@@ -479,11 +479,11 @@ void JpegBase::printStructure(std::ostream& out, PrintStructureOption option, in
       bool bLF = bPrint;
 
       // 2-byte buffer for reading the size.
-      byte sizebuf[2];
+      std::array<byte, 2> sizebuf;
       uint16_t size = 0;
       if (markerHasLength(marker)) {
-        io_->readOrThrow(sizebuf, 2, ErrorCode::kerFailedToReadImageData);
-        size = getUShort(sizebuf, bigEndian);
+        io_->readOrThrow(sizebuf.data(), sizebuf.size(), ErrorCode::kerFailedToReadImageData);
+        size = getUShort(sizebuf.data(), bigEndian);
         // `size` is the size of the segment, including the 2-byte size field
         // that we just read.
         enforce(size >= 2, ErrorCode::kerFailedToReadImageData);
@@ -493,7 +493,7 @@ void JpegBase::printStructure(std::ostream& out, PrintStructureOption option, in
       DataBuf buf(size);
       if (size > 0) {
         io_->readOrThrow(buf.data(2), size - 2, ErrorCode::kerFailedToReadImageData);
-        buf.copyBytes(0, sizebuf, 2);
+        std::copy(sizebuf.begin(), sizebuf.end(), buf.begin());
       }
 
       if (bPrint && markerHasLength(marker))
@@ -732,11 +732,11 @@ void JpegBase::writeMetadata() {
 
 DataBuf JpegBase::readNextSegment(byte marker) {
   // 2-byte buffer for reading the size.
-  byte sizebuf[2];
+  std::array<byte, 2> sizebuf;
   uint16_t size = 0;
   if (markerHasLength(marker)) {
-    io_->readOrThrow(sizebuf, 2, ErrorCode::kerFailedToReadImageData);
-    size = getUShort(sizebuf, bigEndian);
+    io_->readOrThrow(sizebuf.data(), sizebuf.size(), ErrorCode::kerFailedToReadImageData);
+    size = getUShort(sizebuf.data(), bigEndian);
     // `size` is the size of the segment, including the 2-byte size field
     // that we just read.
     enforce(size >= 2, ErrorCode::kerFailedToReadImageData);
@@ -746,7 +746,7 @@ DataBuf JpegBase::readNextSegment(byte marker) {
   DataBuf buf(size);
   if (size > 0) {
     io_->readOrThrow(buf.data(2), size - 2, ErrorCode::kerFailedToReadImageData);
-    buf.copyBytes(0, sizebuf, 2);
+    std::copy(sizebuf.begin(), sizebuf.end(), buf.begin());
   }
   return buf;
 }
@@ -805,7 +805,7 @@ void JpegBase::doWriteMetadata(BasicIo& outIo) {
       ++search;
       if (buf.size() > 8) {
         rawExif.alloc(buf.size() - 8);
-        rawExif.copyBytes(0, buf.c_data(8), buf.size() - 8);
+        std::copy_n(buf.c_data(8), rawExif.size(), rawExif.begin());
       }
     } else if (skipApp1Xmp == notfound && marker == app1_ &&
                buf.size() >= 31 &&  // prevent out-of-bounds read in memcmp on next line
diff --git a/src/makernote_int.cpp b/src/makernote_int.cpp
index 0fdbdd98..6aaf5738 100644
--- a/src/makernote_int.cpp
+++ b/src/makernote_int.cpp
@@ -188,7 +188,7 @@ bool OlympusMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder
   if (!pData || size < sizeOfSignature())
     return false;
   header_.alloc(sizeOfSignature());
-  header_.copyBytes(0, pData, header_.size());
+  std::copy_n(pData, header_.size(), header_.data());
   return !(header_.size() < sizeOfSignature() || 0 != header_.cmpBytes(0, signature_, 6));
 }
 
@@ -223,7 +223,7 @@ bool Olympus2MnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrde
   if (!pData || size < sizeOfSignature())
     return false;
   header_.alloc(sizeOfSignature());
-  header_.copyBytes(0, pData, header_.size());
+  std::copy_n(pData, header_.size(), header_.data());
   return !(header_.size() < sizeOfSignature() || 0 != header_.cmpBytes(0, signature_, 10));
 }
 
@@ -263,7 +263,7 @@ bool FujiMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*/)
   if (!pData || size < sizeOfSignature())
     return false;
   header_.alloc(sizeOfSignature());
-  header_.copyBytes(0, pData, header_.size());
+  std::copy_n(pData, header_.size(), header_.data());
   // Read offset to the IFD relative to the start of the makernote
   // from the header. Note that we ignore the byteOrder argument
   start_ = header_.read_uint32(8, byteOrder_);
@@ -299,7 +299,7 @@ bool Nikon2MnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*
   if (0 != memcmp(pData, signature_, 6))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   start_ = sizeOfSignature();
   return true;
 }  // Nikon2MnHeader::read
@@ -318,7 +318,7 @@ size_t Nikon3MnHeader::sizeOfSignature() {
 
 Nikon3MnHeader::Nikon3MnHeader() : byteOrder_(invalidByteOrder), start_(sizeOfSignature()) {
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, signature_, buf_.size());
+  std::copy_n(signature_, buf_.size(), buf_.data());
 }
 
 size_t Nikon3MnHeader::size() const {
@@ -343,7 +343,7 @@ bool Nikon3MnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*
   if (0 != memcmp(pData, signature_, 6))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   TiffHeader th;
   if (!th.read(buf_.data(10), 8))
     return false;
@@ -389,7 +389,7 @@ bool PanasonicMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrd
   if (0 != memcmp(pData, signature_, 9))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   start_ = sizeOfSignature();
   return true;
 }  // PanasonicMnHeader::read
@@ -425,7 +425,7 @@ bool PentaxDngMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrd
   if (!pData || size < sizeOfSignature())
     return false;
   header_.alloc(sizeOfSignature());
-  header_.copyBytes(0, pData, header_.size());
+  std::copy_n(pData, header_.size(), header_.data());
   return !(header_.size() < sizeOfSignature() || 0 != header_.cmpBytes(0, signature_, 7));
 }
 
@@ -456,7 +456,7 @@ bool PentaxMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*
   if (!pData || size < sizeOfSignature())
     return false;
   header_.alloc(sizeOfSignature());
-  header_.copyBytes(0, pData, header_.size());
+  std::copy_n(pData, header_.size(), header_.data());
   return !(header_.size() < sizeOfSignature() || 0 != header_.cmpBytes(0, signature_, 3));
 }
 
@@ -510,7 +510,7 @@ bool SigmaMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*/
   if (0 != memcmp(pData, signature1_, 8) && 0 != memcmp(pData, signature2_, 8))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   start_ = sizeOfSignature();
   return true;
 }  // SigmaMnHeader::read
@@ -544,7 +544,7 @@ bool SonyMnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*/)
   if (0 != memcmp(pData, signature_, sizeOfSignature()))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   start_ = sizeOfSignature();
   return true;
 }  // SonyMnHeader::read
@@ -583,7 +583,7 @@ bool Casio2MnHeader::read(const byte* pData, size_t size, ByteOrder /*byteOrder*
   if (0 != memcmp(pData, signature_, sizeOfSignature()))
     return false;
   buf_.alloc(sizeOfSignature());
-  buf_.copyBytes(0, pData, buf_.size());
+  std::copy_n(pData, buf_.size(), buf_.data());
   start_ = sizeOfSignature();
   return true;
 }  // Casio2MnHeader::read
@@ -891,7 +891,7 @@ DataBuf nikonCrypt(uint16_t tag, const byte* pData, size_t size, TiffComponent*
     }
   }
   buf.alloc(size);
-  buf.copyBytes(0, pData, buf.size());
+  std::copy_n(pData, buf.size(), buf.data());
   ncrypt(buf.data(nci->start_), static_cast<uint32_t>(buf.size()) - nci->start_, count, serial);
   return buf;
 }
diff --git a/src/pgfimage.cpp b/src/pgfimage.cpp
index 54deb843..dcbfc3d0 100644
--- a/src/pgfimage.cpp
+++ b/src/pgfimage.cpp
@@ -180,7 +180,7 @@ void PgfImage::doWriteMetadata(BasicIo& outIo) {
   // Write new Header size.
   uint32_t newHeaderSize = static_cast<uint32_t>(header.size() + imgSize);
   DataBuf buffer(4);
-  buffer.copyBytes(0, &newHeaderSize, 4);
+  std::copy_n(&newHeaderSize, 4, buffer.data());
   byteSwap_(buffer, 0, bSwap_);
   if (outIo.write(buffer.c_data(), 4) != 4)
     throw Error(ErrorCode::kerImageWriteFailed);
@@ -259,7 +259,7 @@ DataBuf PgfImage::readPgfHeaderStructure(BasicIo& iIo, uint32_t& width, uint32_t
     throw Error(ErrorCode::kerInputDataReadFailed);
 
   DataBuf work(8);  // don't disturb the binary data - doWriteMetadata reuses it
-  work.copyBytes(0, header.c_data(), 8);
+  std::copy_n(header.c_data(), 8, work.begin());
   width = byteSwap_(work, 0, bSwap_);
   height = byteSwap_(work, 4, bSwap_);
 
diff --git a/src/pngchunk_int.cpp b/src/pngchunk_int.cpp
index 8a3cee9f..f41f9bf1 100644
--- a/src/pngchunk_int.cpp
+++ b/src/pngchunk_int.cpp
@@ -490,7 +490,7 @@ DataBuf PngChunk::readRawProfile(const DataBuf& text, bool iTXt) {
 
   if (iTXt) {
     info.alloc(text.size());
-    info.copyBytes(0, text.c_data(), text.size());
+    std::copy(text.cbegin(), text.cend(), info.begin());
     return info;
   }
 
diff --git a/src/pngimage.cpp b/src/pngimage.cpp
index a37bb8a3..c350e826 100644
--- a/src/pngimage.cpp
+++ b/src/pngimage.cpp
@@ -340,10 +340,10 @@ void PngImage::printStructure(std::ostream& out, PrintStructureOption option, in
           }
 
           if (bSoft && !dataBuf.empty()) {
-            DataBuf s(dataBuf.size() + 1);                     // allocate buffer with an extra byte
-            s.copyBytes(0, dataBuf.c_data(), dataBuf.size());  // copy in the dataBuf
-            s.write_uint8(dataBuf.size(), 0);                  // nul terminate it
-            const auto str = s.c_str();                        // give it name
+            DataBuf s(dataBuf.size() + 1);                         // allocate buffer with an extra byte
+            std::copy(dataBuf.begin(), dataBuf.end(), s.begin());  // copy in the dataBuf
+            s.write_uint8(dataBuf.size(), 0);                      // nul terminate it
+            const auto str = s.c_str();                            // give it name
             out << Internal::indent(depth) << buff.c_str() << ": " << str;
             bLF = true;
           }
@@ -526,7 +526,7 @@ void PngImage::doWriteMetadata(BasicIo& outIo) {
     // Read whole chunk : Chunk header + Chunk data (not fixed size - can be null) + CRC (4 bytes).
 
     DataBuf chunkBuf(8 + dataOffset + 4);                   // Chunk header (8 bytes) + Chunk data + CRC (4 bytes).
-    chunkBuf.copyBytes(0, cheaderBuf.c_data(), 8);          // Copy header.
+    std::copy_n(cheaderBuf.begin(), 8, chunkBuf.begin());   // Copy header.
     bufRead = io_->read(chunkBuf.data(8), dataOffset + 4);  // Extract chunk data + CRC
     if (io_->error())
       throw Error(ErrorCode::kerFailedToReadImageData);
diff --git a/src/preview.cpp b/src/preview.cpp
index b84b12e9..3333b73b 100644
--- a/src/preview.cpp
+++ b/src/preview.cpp
@@ -12,6 +12,7 @@
 #include "tiffimage.hpp"
 #include "tiffimage_int.hpp"
 
+#include <algorithm>
 #include <climits>
 
 namespace {
@@ -739,7 +740,7 @@ DataBuf LoaderTiff::getData() const {
           // That's why we check again for each step here to really make sure we don't overstep
           enforce(Safe::add(idxBuf, size) <= size_, ErrorCode::kerCorruptedMetadata);
           if (size != 0 && Safe::add(offset, size) <= static_cast<uint32_t>(io.size())) {
-            buf.copyBytes(idxBuf, base + offset, size);
+            std::copy_n(base + offset, size, buf.begin() + idxBuf);
           }
 
           idxBuf += size;
@@ -953,9 +954,9 @@ DataBuf makePnm(size_t width, size_t height, const DataBuf &rgb) {
   const std::string header = "P6\n" + toString(width) + " " + toString(height) + "\n255\n";
   const auto headerBytes = reinterpret_cast<const byte *>(header.data());
 
-  DataBuf dest(static_cast<long>(header.size() + rgb.size()));
-  dest.copyBytes(0, headerBytes, header.size());
-  dest.copyBytes(header.size(), rgb.c_data(), rgb.size());
+  DataBuf dest(header.size() + rgb.size());
+  std::copy_n(headerBytes, header.size(), dest.begin());
+  std::copy_n(rgb.c_data(), rgb.size(), dest.begin() + header.size());
   return dest;
 }
 
diff --git a/src/tiffvisitor_int.cpp b/src/tiffvisitor_int.cpp
index 79eb3dc5..38e1fe09 100644
--- a/src/tiffvisitor_int.cpp
+++ b/src/tiffvisitor_int.cpp
@@ -512,7 +512,7 @@ void TiffEncoder::encodeIptc() {
     if (rawIptc.size() % 4 != 0) {
       // Pad the last unsignedLong value with 0s
       buf.alloc((rawIptc.size() / 4) * 4 + 4);
-      buf.copyBytes(0, rawIptc.c_data(), rawIptc.size());
+      std::copy(rawIptc.begin(), rawIptc.end(), buf.begin());
     } else {
       buf = std::move(rawIptc);  // Note: This resets rawIptc
     }
diff --git a/src/types.cpp b/src/types.cpp
index 26c0ca8f..71871688 100644
--- a/src/types.cpp
+++ b/src/types.cpp
@@ -164,15 +164,6 @@ void Exiv2::DataBuf::write_uint64(size_t offset, uint64_t x, ByteOrder byteOrder
   ull2Data(&pData_[offset], x, byteOrder);
 }
 
-void Exiv2::DataBuf::copyBytes(size_t offset, const void* buf, size_t bufsize) {
-  if (pData_.size() < bufsize || offset > pData_.size() - bufsize) {
-    throw std::overflow_error("Overflow in Exiv2::DataBuf::copyBytes");
-  }
-  if (bufsize > 0) {
-    memcpy(&pData_[offset], buf, bufsize);
-  }
-}
-
 int Exiv2::DataBuf::cmpBytes(size_t offset, const void* buf, size_t bufsize) const {
   if (pData_.size() < bufsize || offset > pData_.size() - bufsize) {
     throw std::overflow_error("Overflow in Exiv2::DataBuf::cmpBytes");
diff --git a/src/webpimage.cpp b/src/webpimage.cpp
index bfe05cd2..020e6975 100644
--- a/src/webpimage.cpp
+++ b/src/webpimage.cpp
@@ -680,18 +680,18 @@ void WebPImage::decodeChunks(long filesize) {
 
       if (s_header) {
         us2Data(size_buff2, static_cast<uint16_t>(sizePayload - 6), bigEndian);
-        rawExifData.copyBytes(0, reinterpret_cast<char*>(&exifLongHeader), 4);
-        rawExifData.copyBytes(4, reinterpret_cast<char*>(&size_buff2), 2);
+        std::copy_n(reinterpret_cast<char*>(&exifLongHeader), 4, rawExifData.begin());
+        std::copy_n(reinterpret_cast<char*>(&size_buff2), 2, rawExifData.begin() + 4);
       }
 
       if (be_header || le_header) {
         us2Data(size_buff2, static_cast<uint16_t>(sizePayload - 6), bigEndian);
-        rawExifData.copyBytes(0, reinterpret_cast<char*>(&exifLongHeader), 4);
-        rawExifData.copyBytes(4, reinterpret_cast<char*>(&size_buff2), 2);
-        rawExifData.copyBytes(6, reinterpret_cast<char*>(&exifShortHeader), 6);
+        std::copy_n(reinterpret_cast<char*>(&exifLongHeader), 4, rawExifData.begin());
+        std::copy_n(reinterpret_cast<char*>(&size_buff2), 2, rawExifData.begin() + 4);
+        std::copy_n(reinterpret_cast<char*>(&exifShortHeader), 6, rawExifData.begin() + 6);
       }
 
-      rawExifData.copyBytes(offset, payload.c_data(), payload.size());
+      std::copy(payload.begin(), payload.end(), rawExifData.begin() + offset);
 
 #ifdef EXIV2_DEBUG_MESSAGES
       std::cout << "Display Hex Dump [size:" << static_cast<unsigned long>(sizePayload) << "]" << std::endl;