More work.

More work.

src/Makefile.am

@@ -3,14 +3,15 @@ CFLAGS += -g -Wall 	\
 	-Wmissing-prototypes -Wmissing-declarations 
 
 bin_PROGRAMS = gnumeric
-noinst_PROGRAMS = test-format 
+noinst_PROGRAMS = test-format test-parser
 
 INCLUDES = 			\
 	-DGNOMELOCALEDIR=\""$(datadir)/locale"\" \
 	-I$(includedir)				 \
 	$(GNOME_INCLUDEDIR)
 
-gnumeric_SOURCES =		\
+
+GNUMERIC_BASE_SOURCES =		\
 	cell.h			\
 	expr.c			\
 	expr.h			\
@@ -27,7 +28,6 @@ gnumeric_SOURCES =		\
 	item-edit.h		\
 	item-grid.c		\
 	item-grid.h		\
-	main.c			\
 	parser.y		\
 	sheet.c			\
 	sheet.h			\
@@ -39,6 +39,11 @@ gnumeric_SOURCES =		\
 	utils.h			\
 	workbook.c
 
+gnumeric_SOURCES =		\
+	main.c			\
+	$(GNUMERIC_BASE_SOURCES)
+
+
 gnumeric_LDADD = \
 	$(GNOME_LIBDIR) \
 	$(GNOMEUI_LIBS)	\
@@ -50,6 +55,14 @@ test_format_LDADD = \
 	$(GNOME_LIBDIR) \
 	$(GNOMEUI_LIBS)
 
+test_parser_SOURCES = 		\
+	test-parser.c		\
+	$(GNUMERIC_BASE_SOURCES)
+	
+test_parser_LDADD =		\
+	$(GNOME_LIBDIR)	\
+	$(GNOMEUI_LIBS) -lgmp
+
 #test_token_SOURCES = 		\
 #	test-token.c		\
 #	token.c			\

src/cell.h

@@ -36,11 +36,12 @@ typedef struct {
 	char      *entered_text;
 	
 	/* Type of the content and the actual parsed content */
-	EvalNode  *parsed_node;
+	EvalNode  *parsed_node;	/* Parse tree with the expression */
+	Value     *value;	/* Last value computed */
 	Style     *style;
 	
 	/* computed versions of the cell contents */
-	char      *text;	/* Text displayed */
+	char      *text;	/* Text rendered and displayed */
 	GdkColor  color;	/* color for the displayed text */
 	int       width;	/* Width of text */
 	int       height;	/* Height of text */
@@ -48,6 +49,7 @@ typedef struct {
 	int       flags;
 } Cell;
 
+
 #define CELL_IS_FORMULA(cell) (cell->entered_text [0] == '=')
 
 #endif /* GNUMERIC_CELL_H */

src/expr.c

 #include <config.h>
-#include <glib.h>
-#include <libgnome/gnome-defs.h>
-#include <libgnome/gnome-i18n.h>
-#include "numbers.h"
-#include "symbol.h"
-#include "expr.h"
+#include <gnome.h>
+#include "gnumeric.h"
 
 char *parser_expr;
 ParseErr parser_error;
 EvalNode *parser_result;
-int   parser_col, parser_row;
 
 EvalNode *
-eval_parse_string (char *expr, int col, int row, char **error_msg)
+eval_parse_string (char *expr, char **error_msg)
 {
 	parser_expr = expr;
 	parser_error = PARSE_OK;
-	parser_col = col;
-	parser_row = row;
 	
 	yyparse ();
 	switch (parser_error){
 	case PARSE_OK:
 		*error_msg = NULL;
-		break;
+		return parser_result;
 
+	case PARSE_ERR_SYNTAX:
+		*error_msg = _("Syntax error");
+		break;
+			
 	case PARSE_ERR_NO_QUOTE:
 		*error_msg = _("Missing quote");
 		break;
@@ -32,7 +29,7 @@ eval_parse_string (char *expr, int col, int row, char **error_msg)
 	return NULL;
 }
 
-static void
+void
 eval_release_value (Value *value)
 {
 	switch (value->type){
@@ -90,14 +87,239 @@ eval_release_node (EvalNode *node)
 	g_free (node);
 }
 
+/*
+ * Casts a value to float if it is integer, and returns
+ * a new Value * if required
+ */
 Value *
-eval_node (EvalNode *node)
+eval_cast_to_float (Value *v)
+{
+	Value *newv;
+	
+	g_return_val_if_fail (VALUE_IS_NUMBER (v), NULL);
+
+	if (v->type == VALUE_FLOAT)
+		return v;
+	
+	newv = g_new (Value, 1);
+	newv->type = VALUE_FLOAT;
+	mpf_set_z (newv->v.v_float, v->v.v_int);
+	eval_release_value (v);
+	
+	return newv;
+}
+
+static Value *
+eval_cell_value (Sheet *sheet, Value *value)
 {
+	Value *res;
+	
+	res = g_new (Value, 1);
+	res->type = value->type;
+	
+	switch (res->type){
+	case VALUE_STRING:
+		res->v.str = value->v.str;
+		symbol_ref (res->v.str);
+		break;
+		
+	case VALUE_INTEGER:
+		mpz_init (res->v.v_int);
+		mpz_set  (res->v.v_int, value->v.v_int);
+		break;
+		
+	case VALUE_FLOAT:
+		mpf_init (res->v.v_float);
+		mpf_set (res->v.v_float, value->v.v_float);
+		break;
+		
+	case VALUE_CELLRANGE:
+		res->v.cell_range = value->v.cell_range;
+		break;
+	}
+	return res;
+}
+
+Value *
+eval_node_value (void *asheet, EvalNode *node, char **error_string)
+{
+	Value *a, *b, *res;
+	Sheet *sheet = asheet;
+	
 	switch (node->oper){
 	case OP_ADD:
 	case OP_SUB:
 	case OP_MULT:
 	case OP_DIV:
 	case OP_EXP:
+		a = eval_node_value (sheet, node->u.binary.value_a,
+				     error_string);
+		b = eval_node_value (sheet, node->u.binary.value_b,
+				     error_string);
+
+		if (!(a && b)){
+			if (a)
+				eval_release_value (a);
+			if (b)
+				eval_release_value (b);
+			return NULL;
+		}
+		
+		if (!VALUE_IS_NUMBER (a) || !VALUE_IS_NUMBER (b)){
+			eval_release_value (a);
+			eval_release_value (b);
+			*error_string = _("Type mismatch");
+			return NULL;
+		}
+		
+		res = g_new (Value, 1);
+		if (a->type == VALUE_INTEGER && b->type == VALUE_INTEGER){
+			res->type = VALUE_INTEGER;
+			mpz_init (res->v.v_int);
+			
+			switch (node->oper){
+			case OP_ADD:
+				mpz_add (res->v.v_int, a->v.v_int, b->v.v_int);
+				break;
+				
+			case OP_SUB:
+				mpz_sub (res->v.v_int, a->v.v_int, b->v.v_int);
+				break;
+				
+			case OP_MULT:
+				mpz_mul (res->v.v_int, a->v.v_int, b->v.v_int);
+				break;
+				
+			case OP_DIV:
+				if (mpz_cmp_si (b->v.v_int, 0)){
+					eval_release_value (a);
+					eval_release_value (b);
+					eval_release_value (res);
+					*error_string = _("Division by zero");
+					return NULL;
+				}
+					
+				mpz_tdivq(res->v.v_int, a->v.v_int,b->v.v_int);
+				break;
+				
+			case OP_EXP:
+				mpz_set_si (res->v.v_int, 0);
+				g_warning ("INT EXP not implemented yet\n");
+				break;
+			default:
+			}
+		} else {
+			res->type = VALUE_FLOAT;
+			mpf_init (res->v.v_float);
+			a = eval_cast_to_float (a);
+			b = eval_cast_to_float (b);
+			
+			switch (node->oper){
+			case OP_ADD:
+				mpf_add (res->v.v_float,
+					 a->v.v_float, b->v.v_float);
+				break;
+				
+			case OP_SUB:
+				mpf_sub (res->v.v_float,
+					 a->v.v_float, b->v.v_float);
+				break;
+				
+			case OP_MULT:
+				mpf_mul (res->v.v_float,
+					 a->v.v_float, b->v.v_float);
+				break;
+				
+			case OP_DIV:
+				if (mpf_cmp_si (b->v.v_int, 0)){
+					eval_release_value (a);
+					eval_release_value (b);
+					eval_release_value (res);
+					*error_string = _("Division by zero");
+					return NULL;
+				}
+					
+				mpf_div (res->v.v_float,
+					 a->v.v_float, b->v.v_float);
+				break;
+				
+			case OP_EXP:
+				mpz_set_si (res->v.v_int, 0);
+				g_warning ("FLOAT EXP not implemented yet\n");
+				break;
+			default:
+			}
+		}
+		eval_release_value (a);
+		eval_release_value (b);
+		return res;
+		
+	case OP_CONCAT:
+		g_warning ("Concat not implemented yet\n");
+		*error_string = _("OOPS");
+		return NULL;
+
+	case OP_FUNCALL:
+		g_warning ("Function call not implemented yet\n");
+		*error_string = _("OOPS");
+		return NULL;
+
+	case OP_CONSTANT:
+		return eval_cell_value (sheet, node->u.constant);
+
+	case OP_VAR:{
+		Cell *cell;
+		int col, row;
+		
+		if (sheet == NULL){
+			/* Only the test program requests this */
+			res = g_new (Value, 1);
+
+			res->type = VALUE_FLOAT;
+			res->v.v_float = 3.14;
+			
+			return res;
+		}
+
+		col = node->u.constant->v.cell.col;
+		row = node->u.constant->v.cell.row;
+
+		cell = sheet_cell_get (sheet, col, row);
+		if (!cell)
+			cell = sheet_cell_new (sheet, col, row);
+		
+		if (!cell->value){
+			res = g_new (Value, 1);
+			
+			res->type = VALUE_INTEGER;
+			res->v.v_int = 0;
+		} else {
+			return eval_cell_value (sheet, cell->value);
+		}
+		return res;
+	}
+	case OP_NEG:
+		a = eval_node_value (sheet, node->u.value,
+				     error_string);
+		if (!a)
+			return NULL;
+		if (!VALUE_IS_NUMBER (a)){
+			*error_string = _("Type mismatch");
+			eval_release_value (a);
+			return NULL;
+		}
+		res = g_new (Value, 1);
+		if (a->type == VALUE_INTEGER){
+			mpz_init_set (res->v.v_int, a->v.v_int);
+			mpz_neg (res->v.v_int, a->v.v_int);
+		} else {
+			mpf_init_set (res->v.v_int, a->v.v_int);
+			mpf_neg (res->v.v_float, a->v.v_float);
+		}
+		eval_release_value (a);
+		return res;
 	}
+	
+	*error_string = _("Unknown evaluation error");
+	return NULL;
 }

src/expr.h

@@ -34,6 +34,7 @@ typedef struct {
 
 typedef struct {
 	int col, row;
+
 	unsigned int col_abs:1;
 	unsigned int row_abs:1;
 } CellRef;
@@ -53,6 +54,9 @@ typedef struct {
 	} v;
 } Value;
 
+#define VALUE_IS_NUMBER(x) (((x)->type == VALUE_INTEGER) || \
+			    ((x)->type == VALUE_FLOAT))
+
 struct EvalNode {
 	Operation oper;
 	union {
@@ -76,16 +80,26 @@ typedef struct EvalNode EvalNode;
 
 typedef enum {
 	PARSE_OK,
-	PARSE_ERR_NO_QUOTE
+	PARSE_ERR_NO_QUOTE,
+	PARSE_ERR_SYNTAX
 } ParseErr;
 
 /* For talking to yyparse */
 extern char     *parser_expr;
-extern ParseErr parser_error;
+extern ParseErr  parser_error;
 extern EvalNode *parser_result;
 
-EvalNode   *eval_parse_string (char *expr, int col, int row, char **error_msg);
-void        eval_release_node (EvalNode *node);
-int         yyparse           (void);
+EvalNode   *eval_parse_string  (char *expr, char **error_msg);
+Value      *eval_node_value    (void *asheet, EvalNode *node,
+				char **error_string);
+
+void        eval_release_node  (EvalNode *node);
+void        eval_release_value (Value *value);
+Value      *eval_cast_to_float (Value *v);
+
+void        eval_dump_value    (Value *value);
+char       *eval_value_string  (Value *value);
+
+int         yyparse            (void);
 
 #endif

src/gnumeric-canvas.c

@@ -59,22 +59,35 @@ gnumeric_sheet_cursor_set (GnumericSheet *sheet, int col, int row)
 }
 
 void
-gnumeric_sheet_accept_pending_output (GnumericSheet *sheet)
+gnumeric_sheet_set_current_value (GnumericSheet *sheet)
 {
 	Cell *cell;
+	int  col, row;
+	
+	g_return_if_fail (sheet != NULL);
+	g_return_if_fail (GNUMERIC_IS_SHEET (sheet));
+
+	col = sheet->cursor_col;
+	row = sheet->cursor_row;
+	cell = sheet_cell_get (sheet->sheet, col, row);
+	if (!cell)
+		cell = sheet_cell_new (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
+	
+	cell_set_text (sheet->sheet, cell, gtk_entry_get_text (GTK_ENTRY (sheet->entry)));
+	sheet_redraw_all (sheet->sheet);
+}
 
+void
+gnumeric_sheet_accept_pending_output (GnumericSheet *sheet)
+{
 	g_return_if_fail (sheet != NULL);
 	g_return_if_fail (GNUMERIC_IS_SHEET (sheet));
 
 	if (!sheet->item_editor)
 		return;
 
-	cell = sheet_cell_get (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
-	if (!cell)
-		cell = sheet_cell_new (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
+	gnumeric_sheet_set_current_value (sheet);
 	
-	cell_set_text (cell, gtk_entry_get_text (GTK_ENTRY (sheet->entry)));
-
 	gtk_object_destroy (GTK_OBJECT (sheet->item_editor));
 	sheet->item_editor = NULL;
 }
@@ -85,14 +98,19 @@ gnumeric_sheet_load_cell_val (GnumericSheet *gsheet)
 	Sheet *sheet; 
 	Workbook *wb;
 	GtkWidget *entry;
-
+	Cell *cell;
+	
 	g_return_if_fail (GNUMERIC_IS_SHEET (gsheet));
 	
 	sheet = gsheet->sheet;
 	wb = sheet->parent_workbook;
 	entry = wb->ea_input;
-	
-	gtk_entry_set_text (GTK_ENTRY(entry), "");
+
+	cell = sheet_cell_get (sheet, gsheet->cursor_col, gsheet->cursor_row);
+	if (cell && cell->entered_text){
+		gtk_entry_set_text (GTK_ENTRY(entry), cell->entered_text);
+	} else
+		gtk_entry_set_text (GTK_ENTRY(entry), "");
 }
 
 /*
@@ -126,6 +144,7 @@ start_editing_at_cursor (GnumericSheet *sheet, GtkWidget *entry)
 	GnomeCanvasItem *item;
 	GnomeCanvas *canvas = GNOME_CANVAS (sheet);
 
+	gtk_entry_set_text (GTK_ENTRY(entry), "");
 	item = gnome_canvas_item_new (GNOME_CANVAS_GROUP(canvas->root),
 				      item_edit_get_type (),
 				      "ItemEdit::Sheet",    sheet->sheet,
@@ -230,9 +249,9 @@ gnumeric_sheet_key (GtkWidget *widget, GdkEventKey *event)
 {
 	GnumericSheet *sheet = GNUMERIC_SHEET (widget);
 	Workbook *wb = sheet->sheet->parent_workbook;
-	void (*movefn_horizontal)(GnumericSheet *, int);
-	void (*movefn_vertical)(GnumericSheet *, int);
-	
+	void (*movefn_horizontal) (GnumericSheet *, int);
+	void (*movefn_vertical)   (GnumericSheet *, int);
+
 	if ((event->state & GDK_SHIFT_MASK) != 0){
 		movefn_horizontal = gnumeric_sheet_move_horizontal_selection;
 		movefn_vertical   = gnumeric_sheet_move_vertical_selection;

src/gnumeric-canvas.h

@@ -36,9 +36,11 @@ void       gnumeric_sheet_cursor_set     	 (GnumericSheet *sheet,
 void       gnumeric_sheet_load_cell_val          (GnumericSheet *gsheet);
 void       gnumeric_sheet_accept_pending_output  (GnumericSheet *sheet);
 void       gnumeric_sheet_compute_visible_ranges (GnumericSheet *gsheet);
+void       gnumeric_sheet_set_current_value      (GnumericSheet *sheet);
 
 typedef struct {
 	GnomeCanvasClass parent_class;
 } GnumericSheetClass;
 #endif
 
+

src/gnumeric-sheet.c

@@ -59,22 +59,35 @@ gnumeric_sheet_cursor_set (GnumericSheet *sheet, int col, int row)
 }
 
 void
-gnumeric_sheet_accept_pending_output (GnumericSheet *sheet)
+gnumeric_sheet_set_current_value (GnumericSheet *sheet)
 {
 	Cell *cell;
+	int  col, row;
+	
+	g_return_if_fail (sheet != NULL);
+	g_return_if_fail (GNUMERIC_IS_SHEET (sheet));
+
+	col = sheet->cursor_col;
+	row = sheet->cursor_row;
+	cell = sheet_cell_get (sheet->sheet, col, row);
+	if (!cell)
+		cell = sheet_cell_new (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
+	
+	cell_set_text (sheet->sheet, cell, gtk_entry_get_text (GTK_ENTRY (sheet->entry)));
+	sheet_redraw_all (sheet->sheet);
+}
 
+void
+gnumeric_sheet_accept_pending_output (GnumericSheet *sheet)
+{
 	g_return_if_fail (sheet != NULL);
 	g_return_if_fail (GNUMERIC_IS_SHEET (sheet));
 
 	if (!sheet->item_editor)
 		return;
 
-	cell = sheet_cell_get (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
-	if (!cell)
-		cell = sheet_cell_new (sheet->sheet, sheet->cursor_col, sheet->cursor_row);
+	gnumeric_sheet_set_current_value (sheet);
 	
-	cell_set_text (cell, gtk_entry_get_text (GTK_ENTRY (sheet->entry)));
-
 	gtk_object_destroy (GTK_OBJECT (sheet->item_editor));
 	sheet->item_editor = NULL;
 }
@@ -85,14 +98,19 @@ gnumeric_sheet_load_cell_val (GnumericSheet *gsheet)
 	Sheet *sheet; 
 	Workbook *wb;
 	GtkWidget *entry;
-
+	Cell *cell;
+	
 	g_return_if_fail (GNUMERIC_IS_SHEET (gsheet));
 	
 	sheet = gsheet->sheet;
 	wb = sheet->parent_workbook;
 	entry = wb->ea_input;
-	
-	gtk_entry_set_text (GTK_ENTRY(entry), "");
+
+	cell = sheet_cell_get (sheet, gsheet->cursor_col, gsheet->cursor_row);
+	if (cell && cell->entered_text){
+		gtk_entry_set_text (GTK_ENTRY(entry), cell->entered_text);
+	} else
+		gtk_entry_set_text (GTK_ENTRY(entry), "");
 }
 
 /*
@@ -126,6 +144,7 @@ start_editing_at_cursor (GnumericSheet *sheet, GtkWidget *entry)
 	GnomeCanvasItem *item;
 	GnomeCanvas *canvas = GNOME_CANVAS (sheet);
 
+	gtk_entry_set_text (GTK_ENTRY(entry), "");
 	item = gnome_canvas_item_new (GNOME_CANVAS_GROUP(canvas->root),
 				      item_edit_get_type (),
 				      "ItemEdit::Sheet",    sheet->sheet,
@@ -230,9 +249,9 @@ gnumeric_sheet_key (GtkWidget *widget, GdkEventKey *event)
 {
 	GnumericSheet *sheet = GNUMERIC_SHEET (widget);
 	Workbook *wb = sheet->sheet->parent_workbook;
-	void (*movefn_horizontal)(GnumericSheet *, int);
-	void (*movefn_vertical)(GnumericSheet *, int);
-	
+	void (*movefn_horizontal) (GnumericSheet *, int);
+	void (*movefn_vertical)   (GnumericSheet *, int);
+
 	if ((event->state & GDK_SHIFT_MASK) != 0){
 		movefn_horizontal = gnumeric_sheet_move_horizontal_selection;
 		movefn_vertical   = gnumeric_sheet_move_vertical_selection;

src/gnumeric-sheet.h

@@ -36,9 +36,11 @@ void       gnumeric_sheet_cursor_set     	 (GnumericSheet *sheet,
 void       gnumeric_sheet_load_cell_val          (GnumericSheet *gsheet);
 void       gnumeric_sheet_accept_pending_output  (GnumericSheet *sheet);
 void       gnumeric_sheet_compute_visible_ranges (GnumericSheet *gsheet);
+void       gnumeric_sheet_set_current_value      (GnumericSheet *sheet);
 
 typedef struct {
 	GnomeCanvasClass parent_class;
 } GnumericSheetClass;
 #endif
 
+

src/item-grid.c

@@ -273,13 +273,16 @@ item_grid_draw_cell (GdkDrawable *drawable, ItemGrid *item_grid,
 			    height - (cell->row->margin_a + cell->row->margin_b));
 
 	pixels = 0;
-	do {
-		gdk_draw_text (drawable, font, gc,
-			       x1 + x_offset,
-			       text_base + y_offset,
-			       cell->text, strlen (cell->text));
-		pixels += cell->width;
-	} while (style->halign == HALIGN_FILL && pixels < cell->col->pixels);
+	if (cell->text){
+		do {
+			gdk_draw_text (drawable, font, gc,
+				       x1 + x_offset,
+				       text_base + y_offset,
+				       cell->text, strlen (cell->text));
+			pixels += cell->width;
+		} while (style->halign == HALIGN_FILL &&
+			 pixels < cell->col->pixels);
+	}
 }