trunk/ulp/pcb-gcode-3.6.0.4/source/pcb-gcode-stack.h

@@ -0,0 +1,66 @@
+// -*- Mode: Eagle -*-
+//
+// Routines to implement a stack made from a string array.
+//
+
+//
+// Constants
+//
+int END_OF_STACK = -1;
+
+//
+// Global variables
+//
+string g_stack[];
+int g_stack_ndx = 0;
+int g_fwd_iter = 0;
+int g_rev_iter = 0;
+
+//
+// Module variables
+//
+
+//
+// Functions
+//
+void stack_init() {
+	g_stack_ndx = 0;
+}
+
+string stack_pop() {
+	if (g_stack_ndx > 0) {
+		return g_stack[--g_stack_ndx];
+	}
+	return "EMPTY-STACK";
+}
+
+void stack_push(string astring) {
+	g_stack[g_stack_ndx++] = astring;
+}
+
+string stack_elem(int n) {
+  return g_stack[n];
+}
+
+int stack_count() {
+	return g_stack_ndx;
+}
+
+void stack_sort() {
+	sort(stack_count(), g_stack);
+}
+
+int stack_fwd_iter() {
+	g_fwd_iter = 0;
+	return g_fwd_iter;
+}
+
+int stack_fwd_next() {
+	if (g_fwd_iter == END_OF_STACK)
+		return END_OF_STACK;
+	if (g_fwd_iter < (g_stack_ndx - 1)) {
+		return ++g_fwd_iter;
+	}
+	g_fwd_iter = END_OF_STACK;
+	return END_OF_STACK;
+}