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/* gestalt.c: Glulxe code for gestalt selectors
Designed by Andrew Plotkin <erkyrath@eblong.com>
http://eblong.com/zarf/glulx/index.html
*/
#include "glk.h"
#include "glulxe.h"
#include "gestalt.h"
glui32 do_gestalt(glui32 val, glui32 val2)
{
switch (val) {
case gestulx_GlulxVersion:
return 0x00030102; /* Glulx spec version 3.1.2 */
case gestulx_TerpVersion:
return 0x00000504; /* Glulxe version 0.5.4 */
case gestulx_ResizeMem:
#ifdef FIXED_MEMSIZE
return 0; /* The setmemsize opcodes are compiled out. */
#else /* FIXED_MEMSIZE */
return 1; /* We can handle setmemsize. */
#endif /* FIXED_MEMSIZE */
case gestulx_Undo:
return 1; /* We can handle saveundo and restoreundo. */
case gestulx_IOSystem:
switch (val2) {
case 0:
return 1; /* The "null" system always works. */
case 1:
return 1; /* The "filter" system always works. */
case 2:
return 1; /* A Glk library is hooked up. */
default:
return 0;
}
case gestulx_Unicode:
return 1; /* We can handle Unicode. */
case gestulx_MemCopy:
return 1; /* We can do mcopy/mzero. */
case gestulx_MAlloc:
#ifdef FIXED_MEMSIZE
return 0; /* The malloc opcodes are compiled out. */
#else /* FIXED_MEMSIZE */
return 1; /* We can handle malloc/mfree. */
#endif /* FIXED_MEMSIZE */
case gestulx_MAllocHeap:
return heap_get_start();
case gestulx_Acceleration:
return 1; /* We can do accelfunc/accelparam. */
case gestulx_AccelFunc:
if (accel_find_func(val2))
return 1; /* We know this accelerated function. */
return 0;
case gestulx_Float:
#ifdef FLOAT_SUPPORT
return 1; /* We can do floating-point operations. */
#else /* FLOAT_SUPPORT */
return 0; /* The floating-point opcodes are not compiled in. */
#endif /* FLOAT_SUPPORT */
#ifdef GLULX_EXTEND_GESTALT
GLULX_EXTEND_GESTALT
#endif /* GLULX_EXTEND_GESTALT */
default:
return 0;
}
}
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