Junio C Hamano <gits...@pobox.com> 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;
}

Reply via email to