reworked current array creation code (idea was wrong), compilation fix in Kernal

src/basic/engine_variables/array_create.s

@@ -12,54 +12,90 @@ array_create:
 
 	// XXX check if the array already exists
 
-	// It will be easier if we first perform garbage collection (arrays are not declared often)
+	// Push variable name and FOUR6 on the stack - fetching dimensions might cause
+	// the to be overwritten by the expression parser
+
+	lda VARNAM+0
+	pha
+	lda VARNAM+1
+	pha
+	lda FOUR6
+	pha
+
+	// Push 0 to mark end of the dimensions
+
+	lda #$00
+	pha
+
+	// Now check if the array dimension is given - if not, assume '10' was specified
+
+	bit DIMFLG
+	bmi array_create_fetch_dims
+
+	lda #$0A
+	pha
+	bne array_create_store_dims                  // branch always
+
+array_create_fetch_dims:
+
+	// XXX check if stack has reasonable space free
+
+	// Fetch the dimension, put it on the stack - confirmed with orioginal ROM,
+	// that it also stores dimensions in the reverse order
+
+	jsr fetch_uint8
+	bcs_16 do_SYNTAX_error
+	pha
+
+	// Check if more dimensions are given
+
+	jsr fetch_character_skip_spaces
+	cmp #$2C                                     // ','
+	beq array_create_fetch_dims
+	cmp #$29                                     // ')'
+	bne_16 do_SYNTAX_error
+
+	// FALLTROUGH
+
+array_create_store_dims:
+
+	// We got the dimensions, time to alocate memory. Arrays are not declared too often,
+	// it will be easier if we perform the garbage collection now
 
 	jsr varstr_garbage_collect
 
-	// Now, create the array structure
+	// Create the initial array structure
 
-	lda STREND+0
-	sta INDEX+0
-	lda STREND+1
-	sta INDEX+1
+	// Bytes 0/1 - array name, but we can not fetch it easily now, so skip it
+	// Bytes 2/3 - offset to the next array - our will be the last one, so 0 - but we will set it later
+	// Byte  4   - number of dimensions, determine it
+	// Bytes 5+  - size in each dimension
 
-	// XXX check if there is enough distance between INDEX and FRETOP
+	// INDEX+2/+3 will be used to calculate number of 'records'
 
-	// Store:
-	// - the array name (2 bytes)
-	// - offset to the next array (2 bytes) - 0 to mark the last one
-	// - initial array dimension - 0
+	ldy #$01
+	sty INDEX+3
+	dey
+	sty INDEX+4
 
-#if CONFIG_MEMORY_MODEL_60K
-	
-	// XXX: implement this
+	ldy #$05
+!:
+	pla
+	beq array_create_store_num_dims
 
-#else // CONFIG_MEMORY_MODEL_38K || CONFIG_MEMORY_MODEL_46K || CONFIG_MEMORY_MODEL_50K
+	// XXX implement this
 
-	ldy #$00
-	lda	VARNAM+0
-	sta (STREND), y
-	iny
-	lda	VARNAM+1
-	sta (STREND), y
-	iny
-	lda #$00
-	sta (STREND),y
-	iny
-	sta (STREND),y
-	iny
-	sta (STREND),y
 
-#endif
+array_create_store_num_dims:
 
-	//
+	// .Y contains number of dimensions + 5
+
+	// XXX rework code below
 
 
 
-	// XXX bit DIMFLG, bmi = use default params
 
 
 
-	// XXX
 
 	jsr do_NOT_IMPLEMENTED_error