Teach da65 about table units

doc/da65.sgml

@@ -522,6 +522,11 @@ following attributes are recognized:
 
   </descrip>
 
+  <tag><tt>UNIT</tt></tag>
+  Split the table into sections of this size. For example, if you have a
+  ByteTable of size 48, but it has logical groups of size 16, specifying
+  16 for UNIT adds newlines after every 16 bytes. UNIT is always in bytes.
+
   <tag><tt>ADDRMODE</tt></tag>
   When disassembling 65816 code, this specifies the M and X flag states
   for this range. It's a string argument of the form "mx", capital letters

src/da65/attrtab.h

@@ -71,6 +71,9 @@ typedef enum attr_t {
     atSegmentEnd   = 0x0200,    /* Segment end */
     atSegmentStart = 0x0400,    /* Segment start */
 
+    /* Table unit separator */
+    atTableUnit    = 0x0800,
+
     /* 65816 addressing mode */
     atMem8         = 0x1000,    /* M flag enabled, 8-bit */
     atMem16        = 0x2000,    /* M flag disabled, 16-bit */
@@ -79,7 +82,7 @@ typedef enum attr_t {
 
     atStyleMask    = 0x000F,    /* Output style */
     atLabelMask    = 0x00F0,    /* Label information */
-    atSegmentMask  = 0x0F00,    /* Segment information */
+    atSegmentMask  = 0x0700,    /* Segment information */
     at65816Mask    = 0xF000,    /* 65816 information */
 
 } attr_t;

src/da65/data.c

@@ -70,7 +70,7 @@ static unsigned GetSpan (attr_t Style)
         if ((Attr & atStyleMask) != Style) {
             break;
         }
-        if ((Attr & (atSegmentStart | atSegmentEnd))) {
+        if ((Attr & (atSegmentStart | atSegmentEnd | atTableUnit))) {
             break;
         }
         ++Count;

src/da65/infofile.c

@@ -528,6 +528,7 @@ static void RangeSection (void)
         {   "START",            INFOTOK_START    },
         {   "TYPE",             INFOTOK_TYPE     },
         {   "ADDRMODE",         INFOTOK_ADDRMODE },
+        {   "UNIT",             INFOTOK_UNIT     },
     };
 
     static const IdentTok TypeDefs[] = {
@@ -552,6 +553,7 @@ static void RangeSection (void)
         tName     = 0x08,
         tComment  = 0x10,
         tAddrMode = 0x20,
+        tUnit     = 0x40,
         tNeeded = (tStart | tEnd | tType)
     };
     unsigned Attributes = tNone;
@@ -564,6 +566,7 @@ static void RangeSection (void)
     char* Name          = 0;
     char* Comment       = 0;
     unsigned MemberSize = 0;
+    unsigned Unit       = 0;
 
 
     /* Skip the token */
@@ -682,6 +685,15 @@ static void RangeSection (void)
                 InfoNextTok ();
                 break;
 
+            case INFOTOK_UNIT:
+                AddAttr ("UNIT", &Attributes, tUnit);
+                InfoNextTok ();
+                InfoAssureInt ();
+                InfoRangeCheck (0x0002, 0xFFFF);
+                Unit = InfoIVal;
+                InfoNextTok ();
+                break;
+
             default:
                 Internal ("Unexpected token: %u", InfoTok);
         }
@@ -705,6 +717,26 @@ static void RangeSection (void)
         }
     }
 
+    /* Only tables support unit sizes */
+    if ((Attributes & tUnit) &&
+        Type != atAddrTab &&
+        Type != atByteTab &&
+        Type != atDByteTab &&
+        Type != atDWordTab &&
+        Type != atRtsTab &&
+        Type != atTextTab &&
+        Type != atWordTab) {
+        InfoError ("Only table types support unit size");
+    }
+
+    /* Mark each unit separator */
+    if (Attributes & tUnit) {
+        unsigned i;
+        for (i = Start; i < End; i += Unit) {
+            MarkAddr(i, atTableUnit);
+        }
+    }
+
     /* Start must be less than end */
     if (Start > End) {
         InfoError ("Start value must not be greater than end value");

src/da65/scanner.h

@@ -91,6 +91,7 @@ typedef enum token_t {
     INFOTOK_END,
     INFOTOK_TYPE,
     INFOTOK_ADDRMODE,
+    INFOTOK_UNIT,
 
     INFOTOK_CODE,
     INFOTOK_BYTETAB,