/*
- * Minimalistic GEOSLib overlay demo program
- *
- * 2012-01-01, Oliver Schmidt (ol.sc@web.de)
- *
- */
+** Minimalistic GEOSLib overlay demo program
+**
+** 2012-01-01, Oliver Schmidt (ol.sc@web.de)
+**
+*/
#include <stdio.h>
/* Functions resident in an overlay can call back functions resident in the
- * main program at any time without any precautions. The function show() is
- * an example for such a function resident in the main program.
- */
+** main program at any time without any precautions. The function show() is
+** an example for such a function resident in the main program.
+*/
void show(char *name)
{
char line1[40];
sprintf(line1, CBOLDON "Overlay Demo - Overlay %s" CPLAINTEXT, name);
- DlgBoxOk(line1,
- "Click OK to return to Main.");
+ DlgBoxOk(line1, "Click OK to return to Main.");
}
/* In a real-world overlay program one would probably not use a #pragma but
- * rather place the all the code of certain souce files into the overlay by
- * compiling them with --code-name OVERLAY1.
- */
+** rather place the all the code of certain source files into the overlay by
+** compiling them with --code-name OVERLAY1.
+*/
#pragma code-name(push, "OVERLAY1");
void foo(void)
{
/* Functions resident in an overlay can access all program variables and
- * constants at any time without any precautions because those are never
- * placed in overlays. The string constant "One" is an example for such
- * a constant resident in the main program.
- */
+ ** constants at any time without any precautions because those are never
+ ** placed in overlays. The string constant "One" is an example for such
+ ** a constant resident in the main program.
+ */
show("One");
}
}
/* The macro definitions OVERLAY_ADDR and OVERLAY_SIZE were generated in
- * overlay-demores.h by grc65. They contain the overlay area address and
- * size specific to a certain program.
- */
+ ** overlay-demores.h by grc65. They contain the overlay area address and
+ ** size specific to a certain program.
+ */
if (ReadRecord(OVERLAY_ADDR, OVERLAY_SIZE)) {
_poserror("ReadRecord.1");
return;
}
/* The linker makes sure that the call to foo() ends up at the right mem
- * addr. However it's up to user to make sure that the - right - overlay
- * is actually loaded before making the the call.
- */
+ ** addr. However, it's up to user to make sure that the -- right -- overlay
+ ** actually is loaded before making the call.
+ */
foo();
DlgBoxOk(CBOLDON "Overlay Demo - Main" CPLAINTEXT,
}
/* Replacing one overlay with another one can only happen from the main
- * program. This implies that an overlay can never load another overlay.
- */
+ ** program. This implies that an overlay can never load another overlay.
+ */
if (ReadRecord(OVERLAY_ADDR, OVERLAY_SIZE)) {
_poserror("ReadRecord.2");
return;