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42 lines
854 B
C
42 lines
854 B
C
/*stddef inclusion here to first declare ptrdif as a signed long instead of a signed int*/
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#ifdef _WINDOWS
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# ifndef XP_WIN
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# define XP_WIN
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# endif
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#if defined(_WIN32) || defined(WIN32)
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# ifndef XP_WIN32
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# define XP_WIN32
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# endif
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#else
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# ifndef XP_WIN16
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# define XP_WIN16
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# endif
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#endif
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#endif
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#ifdef XP_WIN16
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#ifndef _PTRDIFF_T_DEFINED
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typedef long ptrdiff_t;
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/*
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* The Win16 compiler treats pointer differences as 16-bit signed values.
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* This macro allows us to treat them as 17-bit signed values, stored in
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* a 32-bit type.
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*/
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#define PTRDIFF(p1, p2, type) \
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((((unsigned long)(p1)) - ((unsigned long)(p2))) / sizeof(type))
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#define _PTRDIFF_T_DEFINED
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#endif /*_PTRDIFF_T_DEFINED*/
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#else /*WIN16*/
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#define PTRDIFF(p1, p2, type) \
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((p1) - (p2))
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#endif
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#include <stddef.h>
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