Implement some basic mode tracking

Makefile

@@ -1,11 +1,12 @@
-OBJS=abCalc.o abCalcExpr.o abCalcExprReal.o abCalcExprInt.o abCalcStack.o
+OBJS=abCalc.o abCalcExpr.o abCalcExprReal.o abCalcExprInt.o abCalcStack.o abCalcMode.o
 NAME=abCalc
 
 all: $(NAME)
 
 abCalcExpr.o: abCalcExpr.h
-abCalcExprReal.o: abCalcExpr.h
+abCalcExprReal.o: abCalcExpr.h abCalcExprReal.h
 abCalcStack.o: abCalcExpr.h abCalcStack.h
+abCalcMode.o: abCalcMode.h abCalcExpr.h
 
 $(NAME): $(OBJS)
 	cc -o $(NAME) $(OBJS)

abCalcExpr.h

@@ -14,7 +14,7 @@ typedef enum abCalcExprType {
 
 
 typedef double abCalcRealType;
-typedef long abCalcIntType;
+typedef unsigned long abCalcIntType;
 
 
 typedef struct abCalcExpr {

abCalcExprReal.h

@@ -0,0 +1,8 @@
+/* 
+    abCalcExprReal.h
+        By: Jeremy Rand
+ */
+
+
+void abCalcExprRealInit(void);
+

abCalcMode.c

@@ -0,0 +1,47 @@
+/* 
+    abCalcMode.c
+        By: Jeremy Rand
+ */
+
+
+#include "abCalcMode.h"
+
+
+
+static abCalcModeIntBase gBase = abCalcModeDecBase;
+static int gIntWidth = AB_CALC_MODE_MAX_INT_WIDTH;
+
+
+void abCalcModeInit(void)
+{
+}
+
+
+abCalcModeIntBase abCalcModeGetBase(void)
+{
+    return gBase;
+}
+
+
+void abCalcModeSetBase(abCalcModeIntBase base)
+{
+    if ((base >= abCalcModeIntBaseMin) &&
+        (base < abCalcModeIntBaseMax)) {
+        gBase = base;
+    }
+}
+
+
+int abCalcModeGetIntWidth(void)
+{
+    return gIntWidth;
+}
+
+
+void abCalcModeSetIntWidth(int width)
+{
+    if ((width > 0) &&
+        (width <= AB_CALC_MODE_MAX_INT_WIDTH)) {
+        gIntWidth = width;
+    }
+}

abCalcMode.h

@@ -0,0 +1,33 @@
+/* 
+    abCalcMode.h
+        By: Jeremy Rand
+ */
+
+
+#include "abCalcExpr.h"
+
+
+typedef enum abCalcModeIntBase
+{
+    abCalcModeIntBaseMin = 0,
+    abCalcModeBinBase = 0,
+    abCalcModeOctBase,
+    abCalcModeDecBase,
+    abCalcModeHexBase,
+
+    abCalcModeIntBaseMax
+} abCalcModeIntBase;
+
+
+#define AB_CALC_MODE_MAX_INT_WIDTH ((sizeof(abCalcIntType) * 8))
+
+
+void abCalcModeInit(void);
+
+abCalcModeIntBase abCalcModeGetBase(void);
+
+void abCalcModeSetBase(abCalcModeIntBase base);
+
+int abCalcModeGetIntWidth(void);
+
+void abCalcModeSetIntWidth(int width);