dbffile - npm Package Compare versions

Comparing version 1.10.0 to 1.11.0

dist/dbf-file.js

@@ -252,3 +252,4 @@ "use strict";
         // The code below assumes the block size is at offset 4 in the .dbt for dBase IV files, and defaults to 512 if
-        // all zeros. For dBase III files, the block size is always 512 bytes.
+        // all zeros. For dBase III files, the block size is always 512 bytes. For VFP9 the block size is at offset 6.
+        // VFP9 memos can have a block size of 1, a special case where each block is sized to fit its value.
         let memoBlockSize = 0;
@@ -260,3 +261,3 @@ let memoFileSize = 0;
             if (dbf._version === 0x30) {
-                // FoxPro9 
+                // VFP9 
                 await utils_1.read(memoFd, buffer, 0, 2, 6);
@@ -375,4 +376,16 @@ memoBlockSize = buffer.readUInt16BE(0) || 512;
                             while (true) {
-                                // Read the next block-sized chunk from the memo file.
-                                await utils_1.read(memoFd, memoBuf, 0, memoBlockSize, blockIndex * memoBlockSize);
+                                if (memoBlockSize > 1) {
+                                    // Read the next block-sized chunk from the memo file.
+                                    await utils_1.read(memoFd, memoBuf, 0, memoBlockSize, blockIndex * memoBlockSize);
+                                }
+                                else {
+                                    // VFP9 with block size 1. This means the block size is variable to fit each value.
+                                    // Read the memo length from the block header.
+                                    memoBuf = memoBuf.length >= 4 ? memoBuf : Buffer.alloc(4);
+                                    await utils_1.read(memoFd, memoBuf, 0, 4, blockIndex + 4);
+                                    len = memoBuf.readInt32BE(0);
+                                    // read the entire memo value (without the header).
+                                    memoBuf = Buffer.alloc(len);
+                                    await utils_1.read(memoFd, memoBuf, 0, len, blockIndex + 8);
+                                }
                                 // Handle first/next block of dBase III memo data.
@@ -430,2 +443,7 @@ if (dbf._version === 0x83) {
                                     let skip = 0;
+                                    if (memoBlockSize == 1) {
+                                        // For VFP9 with block size 1, the entire memo value is in memoBuf.
+                                        value = iconv.decode(memoBuf, encoding);
+                                        break;
+                                    }
                                     if (!mergedBuffer.length) {
@@ -432,0 +450,0 @@ const memoType = memoBuf.readInt32BE(0);

doc/README.md

@@ -12,1 +12,3 @@ For information about the dBase III (.dbf) file format, see:
 - https://github.com/infused/dbf/tree/master/spec/fixtures
+
+For details about Visual FoxPro 9 memo fields with block size 1, see [this article](./vfp9-bs1.pdf)

package.json

 {
   "name": "dbffile",
-  "version": "1.10.0",
+  "version": "1.11.0",
   "description": "Read and write .dbf (dBase III & Visual FoxPro) files in Node.js",
@@ -18,3 +18,3 @@ "main": "dist/index.js",
     "type": "git",
-    "url": "https://github.com/yortus/DBFFile.git"
+    "url": "git+https://github.com/yortus/DBFFile.git"
   },
@@ -21,0 +21,0 @@ "keywords": [

README.md

@@ -11,2 +11,3 @@ # DBFFile
   - `F` (float)
+  - `Y` (currency)
   - `I` (integer)
@@ -13,0 +14,0 @@ - `L` (logical)

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Improved metrics

Total package byte prevSize

206481

increased by10.19%

Number of package files

18

increased by5.88%

Lines of code

977

increased by1.88%

Number of lines in readme file

202

increased by0.5%

No dependency changes