Support for 0x17 byte code (fmp12)

evanmiller · Feb 10, 2021 · 47d336b · 47d336b
1 parent ebe4166
commit 47d336b
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Showing 2 changed files with 25 additions and 4 deletions.
diff --git a/HACKING b/HACKING
@@ -255,12 +255,12 @@ Simple data
     2       5       Value (Bytes)
 
     Offset  Length  Value
-    0       1       0x10
-    1       3       Value (Bytes)
+    0       1               0x10 <= C <= 0x11
+    1       3+(C-0x10)      Value (Bytes)
 
     Offset  Length          Value
-    0       1               0x11 <= C <= 0x15
-    1       2*(C-0x10)+1    Value (Bytes)
+    0       1               0x12 <= C <= 0x15
+    1       1+2*(C-0x10)    Value (Bytes)
 
     Offset  Length  Value
     0       1       (0x19 | 0x23)
@@ -316,6 +316,12 @@ Long key-value
     4       1       N = Length (Integer)
     5       N       Value (Bytes)
 
+    Offset  Length  Value
+    0       1       0x17
+    1       3       Key (Bytes)
+    4       2       N = Length (Integer)
+    6       N       Value (Bytes)
+
     Offset  Length  Value
     0       1       0x1E
     1       1       K = Key Length (Integer)

diff --git a/src/block.c b/src/block.c
@@ -183,6 +183,21 @@ static fmp_error_t process_block_v7(fmp_block_t *block) {
             chunk->data.len = *p++;
             chunk->data.bytes = p;
             p += chunk->data.len;
+        } else if (c == 0x17) {
+            chunk->type = FMP_CHUNK_FIELD_REF_LONG;
+            p++;
+            chunk->ref_long.bytes = p;
+            chunk->ref_long.len = 3;
+            p += chunk->ref_long.len;
+            if (p + 2 > end) {
+                retval = FMP_ERROR_DATA_EXCEEDS_SECTOR_SIZE;
+                free(chunk);
+                break;
+            }
+            chunk->data.len = copy_int(p, 2);
+            p += 2;
+            chunk->data.bytes = p;
+            p += chunk->data.len;
         } else if (c >= 0x19 && c <= 0x1D) {
             chunk->type = FMP_CHUNK_DATA_SIMPLE;
             p++;