X-Git-Url: http://git.nguyen.vg/gitweb/?a=blobdiff_plain;f=BlockArray.h;h=1ee30c1c48825213b0b2b60f057c04f0a84642be;hb=a56dda3a95d2df268969bd3c2c994b5d2f020410;hp=cc60c3558dedb8b8333b47807e3a5f9f6111b1e5;hpb=33f321f97182b61a044e8508c2014ad7ce2bdec6;p=SXSI%2FTextCollection.git

diff --git a/BlockArray.h b/BlockArray.h
index cc60c35..1ee30c1 100644
--- a/BlockArray.h
+++ b/BlockArray.h
@@ -1,7 +1,8 @@
 #ifndef _BLOCK_ARRAY_H_
 #define _BLOCK_ARRAY_H_
-#include <iostream>
 #include "Tools.h"
+#include <iostream>
+#include <stdexcept>
 
 class BlockArray
 {
@@ -15,6 +16,8 @@ public:
        n = len;
        blockLength = blockLen;
        data = new ulong[n*blockLength/W +1];
+       for (ulong i = 0; i < n*blockLength/W +1; ++i)
+           data[i] = 0;
     }
     ~BlockArray() {
        delete [] data;
@@ -43,7 +46,38 @@ public:
     ulong spaceInBits() {
         return n*blockLength+W; // plus 4 ulong's
     }
+
+    /**
+     * Saving data fields:
+     *     ulong n;
+     *     ulong blockLength;
+     *     ulong* data;
+     */
+    void Save(FILE *file) const
+    {
+        if (std::fwrite(&(this->n), sizeof(ulong), 1, file) != 1)
+            throw std::runtime_error("BlockArray::Save(): file write error (n).");
+        if (std::fwrite(&(this->blockLength), sizeof(ulong), 1, file) != 1)
+            throw std::runtime_error("BlockArray::Save(): file write error (blockLength).");
     
+        if (std::fwrite(this->data, sizeof(ulong), n*blockLength/W+1, file) != n*blockLength/W+1)
+            throw std::runtime_error("BlockArray::Save(): file write error (data).");
+    }
+
+    /**
+     * Load from file
+     */
+    BlockArray(FILE *file)
+    {
+        if (std::fread(&(this->n), sizeof(ulong), 1, file) != 1)
+            throw std::runtime_error("BlockArray::Load(): file read error (n).");
+        if (std::fread(&(this->blockLength), sizeof(ulong), 1, file) != 1)
+            throw std::runtime_error("BlockArray::Load(): file read error (blockLength).");
+
+        data = new ulong[n*blockLength/W+1];
+        if (std::fread(this->data, sizeof(ulong), n*blockLength/W+1, file) != n*blockLength/W+1)
+            throw std::runtime_error("BlockArray::Load(): file read error (data).");
+    }
 };
 
 #endif