lindent
[yaffs2.git] / yaffs_packedtags2.c
index f4de18d..5cc68af 100644 (file)
  * modify it under the terms of the GNU Lesser General Public License
  * version 2.1 as published by the Free Software Foundation.
  */
+
 #include "yaffs_packedtags2.h"
 #include "yportenv.h"
 #include "yaffs_tagsvalidity.h"
 
+/* This code packs a set of extended tags into a binary structure for
+ * NAND storage
+ */
 
+/* Some of the information is "extra" struff which can be packed in to
+ * speed scanning
+ * This is defined by having the EXTRA_HEADER_INFO_FLAG set.
+ */
 
-// This code packs a set of extended tags into a binary structure for NAND storage
-
-// Some of the information is "extra" struff which can be packed in to speed scanning
-// This is defined by having the EXTRA_HEADER_INFO_FLAG set.
-
-
-// Extra flags applied to chunkId
+/* Extra flags applied to chunkId */
 
 #define EXTRA_HEADER_INFO_FLAG 0x80000000
 #define EXTRA_SHRINK_FLAG      0x40000000
 
 #define ALL_EXTRA_FLAGS                0xF0000000
 
-
-
-// Also, the top 4 bits of the object Id are set to the object type.
+/* Also, the top 4 bits of the object Id are set to the object type. */
 #define EXTRA_OBJECT_TYPE_SHIFT (28)
 #define EXTRA_OBJECT_TYPE_MASK  ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT)
 
-
-
-static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt)
+static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 * pt)
 {
-       T(YAFFS_TRACE_MTD,(TSTR("packed tags obj %d chunk %d byte %d seq %d"TENDSTR),pt->t.objectId,pt->t.chunkId,pt->t.byteCount,pt->t.sequenceNumber));
+       T(YAFFS_TRACE_MTD,
+         (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR),
+          pt->t.objectId, pt->t.chunkId, pt->t.byteCount,
+          pt->t.sequenceNumber));
 }
 
-static void yaffs_DumpTags2(const yaffs_ExtendedTags *t)
+static void yaffs_DumpTags2(const yaffs_ExtendedTags * t)
 {
-       T(YAFFS_TRACE_MTD,(TSTR("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d"TENDSTR),
-            t->eccResult, t->blockBad, t->chunkUsed, t->objectId, t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, t->sequenceNumber));
-         
+       T(YAFFS_TRACE_MTD,
+         (TSTR
+          ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte "
+           "%d del %d ser %d seq %d"
+           TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId,
+          t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber,
+          t->sequenceNumber));
+
 }
 
-void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t)
+void yaffs_PackTags2(yaffs_PackedTags2 * pt, const yaffs_ExtendedTags * t)
 {
        pt->t.chunkId = t->chunkId;
        pt->t.sequenceNumber = t->sequenceNumber;
        pt->t.byteCount = t->byteCount;
        pt->t.objectId = t->objectId;
-       
-       if(t->chunkId == 0 && t->extraHeaderInfoAvailable)
-       {
-               // Store the extra header info instead
-               pt->t.chunkId = EXTRA_HEADER_INFO_FLAG | t->extraParentObjectId; // We save the parent object in the chunkId
-               if(t->extraIsShrinkHeader) 
-               {
-                   pt->t.chunkId |= EXTRA_SHRINK_FLAG;
+
+       if (t->chunkId == 0 && t->extraHeaderInfoAvailable) {
+               /* Store the extra header info instead */
+               /* We save the parent object in the chunkId */
+               pt->t.chunkId = EXTRA_HEADER_INFO_FLAG
+                       | t->extraParentObjectId;
+               if (t->extraIsShrinkHeader) {
+                       pt->t.chunkId |= EXTRA_SHRINK_FLAG;
                }
-               if(t->extraShadows) 
-               {
-                   pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
+               if (t->extraShadows) {
+                       pt->t.chunkId |= EXTRA_SHADOWS_FLAG;
                }
-               
+
                pt->t.objectId &= ~EXTRA_OBJECT_TYPE_MASK;
-               pt->t.objectId |= (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
-                
-               if(t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
-               {
-                  pt->t.byteCount = t->extraEquivalentObjectId;
-               }
-               else if(t->extraObjectType == YAFFS_OBJECT_TYPE_FILE)
-               {
-                  pt->t.byteCount = t->extraFileLength;
-               }
-               else
-               {
-                  pt->t.byteCount = 0;
+               pt->t.objectId |=
+                   (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT);
+
+               if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
+                       pt->t.byteCount = t->extraEquivalentObjectId;
+               } else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) {
+                       pt->t.byteCount = t->extraFileLength;
+               } else {
+                       pt->t.byteCount = 0;
                }
        }
-       
+
        yaffs_DumpPackedTags2(pt);
        yaffs_DumpTags2(t);
-       
+
 #ifndef YAFFS_IGNORE_TAGS_ECC
-       { 
-         yaffs_ECCCalculateOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&pt->ecc);
+       {
+               yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+                                       sizeof(yaffs_PackedTags2TagsPart),
+                                       &pt->ecc);
        }
 #endif
 }
 
-void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
+void yaffs_UnpackTags2(yaffs_ExtendedTags * t, yaffs_PackedTags2 * pt)
 {
 
-       
-       memset(t,0,sizeof(yaffs_ExtendedTags));
-       
+       memset(t, 0, sizeof(yaffs_ExtendedTags));
+
        yaffs_InitialiseTags(t);
-       
-       if(pt->t.sequenceNumber != 0xFFFFFFFF)
-       {
-               // Page is in use
+
+       if (pt->t.sequenceNumber != 0xFFFFFFFF) {
+               /* Page is in use */
 #ifdef YAFFS_IGNORE_TAGS_ECC
                {
                        t->eccResult = 0;
@@ -119,40 +119,47 @@ void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
 #else
                {
                        yaffs_ECCOther ecc;
-                       yaffs_ECCCalculateOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&ecc);
-                       t->eccResult = yaffs_ECCCorrectOther((unsigned char *)&pt->t,sizeof(yaffs_PackedTags2TagsPart),&pt->ecc,&ecc);
+                       yaffs_ECCCalculateOther((unsigned char *)&pt->t,
+                                               sizeof
+                                               (yaffs_PackedTags2TagsPart),
+                                               &ecc);
+                       t->eccResult =
+                           yaffs_ECCCorrectOther((unsigned char *)&pt->t,
+                                                 sizeof
+                                                 (yaffs_PackedTags2TagsPart),
+                                                 &pt->ecc, &ecc);
                }
 #endif
                t->blockBad = 0;
                t->chunkUsed = 1;
                t->objectId = pt->t.objectId;
-               t->chunkId =  pt->t.chunkId;
+               t->chunkId = pt->t.chunkId;
                t->byteCount = pt->t.byteCount;
                t->chunkDeleted = 0;
                t->serialNumber = 0;
                t->sequenceNumber = pt->t.sequenceNumber;
-               
-               // Do extra header info stuff
-               
-               if(pt->t.chunkId & EXTRA_HEADER_INFO_FLAG)
-               {
+
+               /* Do extra header info stuff */
+
+               if (pt->t.chunkId & EXTRA_HEADER_INFO_FLAG) {
                        t->chunkId = 0;
                        t->byteCount = 0;
-                       
+
                        t->extraHeaderInfoAvailable = 1;
-                       t->extraParentObjectId = pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
-                       t->extraIsShrinkHeader =  (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
-                       t->extraShadows =  (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
-                       t->extraObjectType = pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
+                       t->extraParentObjectId =
+                           pt->t.chunkId & (~(ALL_EXTRA_FLAGS));
+                       t->extraIsShrinkHeader =
+                           (pt->t.chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0;
+                       t->extraShadows =
+                           (pt->t.chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0;
+                       t->extraObjectType =
+                           pt->t.objectId >> EXTRA_OBJECT_TYPE_SHIFT;
                        t->objectId &= ~EXTRA_OBJECT_TYPE_MASK;
-                       
-                       if(t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK)
-                       {
-                           t->extraEquivalentObjectId = pt->t.byteCount;
-                       }
-                       else 
-                       {
-                           t->extraFileLength = pt->t.byteCount;
+
+                       if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) {
+                               t->extraEquivalentObjectId = pt->t.byteCount;
+                       } else {
+                               t->extraFileLength = pt->t.byteCount;
                        }
                }
        }
@@ -161,4 +168,3 @@ void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt)
        yaffs_DumpTags2(t);
 
 }
-