Junio C Hamano <gitster@xxxxxxxxx> writes:
> Eh, wait. BSD and Microsoft have paramters reordered in the
> callback comparison function. I suspect that would not fly very
> well.
Hmm. We could do it like this, which may not be too bad.
#if APPLE_QSORT_R
struct apple_qsort_adapter {
int (*user_cmp)(const void *, const void *, void *);
void *user_ctx;
}
static int apple_qsort_adapter_cmp(void *ctx, const void *a, const void *b)
{
struct apple_qsort_adapter *wrapper_ctx = ctx;
return wrapper_ctx->user_cmp(a, b, wrapper_ctx->user_ctx);
}
#endif
int git_qsort_s(void *b, size_t n, size_t s,
int (*cmp)(const void *, const void *, void *), void *ctx)
{
if (!n)
return 0;
if (!b || !cmp)
return -1;
#if GNU_QSORT_R
qsort_r(b, n, s, cmp, ctx);
#elif APPLE_QSORT_R
{
struct appple_qsort_adapter a = { cmp, ctx };
qsort_r(b, n, s, &a, appple_qsort_adapter_cmp);
}
#endif
return 0;
}