This file is part of mingw-cross-env.
See doc/index.html for further information.

This patch has been taken from:
http://dev.exiv2.org/projects/exiv2/repository/revisions/2646

Index: trunk/src/jpgimage.cpp
===================================================================
--- trunk/src/jpgimage.cpp	(revision 2645)
+++ trunk/src/jpgimage.cpp	(revision 2646)
@@ -86,10 +86,21 @@
     const char     JpegBase::xmpId_[]  = "http://ns.adobe.com/xap/1.0/\0";
 
     const char     Photoshop::ps3Id_[] = "Photoshop 3.0\0";
-    const char     Photoshop::bimId_[] = "8BIM";
+    const char*    Photoshop::irbId_[] = {"8BIM", "AgHg", "DCSR", "PHUT"};
     const uint16_t Photoshop::iptc_    = 0x0404;
     const uint16_t Photoshop::preview_ = 0x040c;
 
+    bool Photoshop::isIrb(const byte* pPsData,
+                          long        sizePsData)
+    {
+        if (sizePsData < 4) return false;
+        for (size_t i = 0; i < (sizeof irbId_) / (sizeof *irbId_); i++) {
+            assert(strlen(irbId_[i]) == 4);
+            if (memcmp(pPsData, irbId_[i], 4) == 0) return true;
+        }
+        return false;
+    }
+
     bool Photoshop::valid(const byte* pPsData,
                           long        sizePsData)
     {
@@ -126,8 +137,7 @@
         std::cerr << "Photoshop::locateIrb: ";
 #endif
         // Data should follow Photoshop format, if not exit
-        while (   position <= sizePsData - 12
-               && memcmp(pPsData + position, Photoshop::bimId_, 4) == 0) {
+        while (position <= sizePsData - 12 && isIrb(pPsData + position, 4)) {
             const byte *hrd = pPsData + position;
             position += 4;
             uint16_t type = getUShort(pPsData + position, bigEndian);
@@ -237,7 +247,7 @@
         DataBuf rawIptc = IptcParser::encode(iptcData);
         if (rawIptc.size_ > 0) {
             byte tmpBuf[12];
-            std::memcpy(tmpBuf, Photoshop::bimId_, 4);
+            std::memcpy(tmpBuf, Photoshop::irbId_[0], 4);
             us2Data(tmpBuf + 4, iptc_, bigEndian);
             tmpBuf[6] = 0;
             tmpBuf[7] = 0;
Index: trunk/src/jpgimage.hpp
===================================================================
--- trunk/src/jpgimage.hpp	(revision 2645)
+++ trunk/src/jpgimage.hpp	(revision 2646)
@@ -64,11 +64,21 @@
     struct EXIV2API Photoshop {
         // Todo: Public for now
         static const char     ps3Id_[]; //!< %Photoshop marker
-        static const char     bimId_[]; //!< %Photoshop marker
+        static const char*    irbId_[]; //!< %Photoshop IRB markers
         static const uint16_t iptc_;    //!< %Photoshop IPTC marker
         static const uint16_t preview_; //!< %Photoshop preview marker
 
         /*!
+          @brief Checks an IRB
+
+          @param pPsData        Existing IRB buffer
+          @param sizePsData     Size of the IRB buffer
+          @return true  if the IRB marker is known and the buffer is big enough to check this;<BR>
+                  false otherwise
+        */
+        static bool isIrb(const byte* pPsData,
+                          long        sizePsData);
+        /*!
           @brief Validates all IRBs
 
           @param pPsData        Existing IRB buffer
Index: trunk/src/psdimage.cpp
===================================================================
--- trunk/src/psdimage.cpp	(revision 2645)
+++ trunk/src/psdimage.cpp	(revision 2646)
@@ -39,6 +39,7 @@
 # include "exv_conf.h"
 #endif
 #include "psdimage.hpp"
+#include "jpgimage.hpp"
 #include "image.hpp"
 #include "basicio.hpp"
 #include "error.hpp"
@@ -56,11 +57,9 @@
 //       Extend this helper to a proper class with all required functionality,
 //       then move it here or into a separate file?
 
-const uint32_t kPhotoshopResourceType = 0x3842494d; // '8BIM'
-
 //! @cond IGNORE
 struct PhotoshopResourceBlock {
-    uint32_t      resourceType;       // always kPhotoshopResourceType
+    uint32_t      resourceType;       // one of the markers in Photoshop::irbId_[]
     uint16_t      resourceId;
     unsigned char resourceName[2];    // Pascal string (length byte + characters), padded to an even size -- this assumes the empty string
     uint32_t      resourceDataSize;
@@ -215,14 +214,11 @@
                 throw Error(3, "Photoshop");
             }
 
-            // read resource type and ID
-            uint32_t resourceType = getULong(buf, bigEndian);
-            uint16_t resourceId = getUShort(buf + 4, bigEndian);
-
-            if (resourceType != kPhotoshopResourceType)
+            if (!Photoshop::isIrb(buf, 4))
             {
                 break; // bad resource type
             }
+            uint16_t resourceId = getUShort(buf + 4, bigEndian);
             uint32_t resourceNameLength = buf[6] & ~1;
 
             // skip the resource name, plus any padding
@@ -447,7 +443,8 @@
             // read resource type and ID
             uint32_t resourceType = getULong(buf, bigEndian);
 
-            if (resourceType != kPhotoshopResourceType) {
+            if (!Photoshop::isIrb(buf, 4))
+            {
                 throw Error(3, "Photoshop"); // bad resource type
             }
             uint16_t resourceId = getUShort(buf + 4, bigEndian);
@@ -493,11 +490,12 @@
                 && resourceId != kPhotoshopResourceID_ExifInfo
                 && resourceId != kPhotoshopResourceID_XMPPacket) {
 #ifdef DEBUG
+                std::cerr << std::hex << "copy : resourceType: " << resourceType << "\n";
                 std::cerr << std::hex << "copy : resourceId: " << resourceId << "\n";
                 std::cerr << std::dec;
 #endif
                 // Copy resource block to new PSD file
-                ul2Data(buf, kPhotoshopResourceType, bigEndian);
+                ul2Data(buf, resourceType, bigEndian);
                 if (outIo.write(buf, 4) != 4) throw Error(21);
                 us2Data(buf, resourceId, bigEndian);
                 if (outIo.write(buf, 2) != 2) throw Error(21);
@@ -577,8 +575,7 @@
                 std::cerr << std::hex << "write: resourceId: " << kPhotoshopResourceID_IPTC_NAA << "\n";
                 std::cerr << std::dec << "Writing IPTC_NAA: size: " << rawIptc.size_ << "\n";
 #endif
-                ul2Data(buf, kPhotoshopResourceType, bigEndian);
-                if (out.write(buf, 4) != 4) throw Error(21);
+                if (out.write(reinterpret_cast<const byte*>(Photoshop::irbId_[0]), 4) != 4) throw Error(21);
                 us2Data(buf, kPhotoshopResourceID_IPTC_NAA, bigEndian);
                 if (out.write(buf, 2) != 2) throw Error(21);
                 us2Data(buf, 0, bigEndian);                      // NULL resource name
@@ -618,8 +615,7 @@
                 std::cerr << std::hex << "write: resourceId: " << kPhotoshopResourceID_ExifInfo << "\n";
                 std::cerr << std::dec << "Writing ExifInfo: size: " << blob.size() << "\n";
 #endif
-                ul2Data(buf, kPhotoshopResourceType, bigEndian);
-                if (out.write(buf, 4) != 4) throw Error(21);
+                if (out.write(reinterpret_cast<const byte*>(Photoshop::irbId_[0]), 4) != 4) throw Error(21);
                 us2Data(buf, kPhotoshopResourceID_ExifInfo, bigEndian);
                 if (out.write(buf, 2) != 2) throw Error(21);
                 us2Data(buf, 0, bigEndian);                      // NULL resource name
@@ -663,8 +659,7 @@
             std::cerr << std::hex << "write: resourceId: " << kPhotoshopResourceID_XMPPacket << "\n";
             std::cerr << std::dec << "Writing XMPPacket: size: " << xmpPacket.size() << "\n";
 #endif
-            ul2Data(buf, kPhotoshopResourceType, bigEndian);
-            if (out.write(buf, 4) != 4) throw Error(21);
+            if (out.write(reinterpret_cast<const byte*>(Photoshop::irbId_[0]), 4) != 4) throw Error(21);
             us2Data(buf, kPhotoshopResourceID_XMPPacket, bigEndian);
             if (out.write(buf, 2) != 2) throw Error(21);
             us2Data(buf, 0, bigEndian);                      // NULL resource name