Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 175 insertions, 0 deletions

diff --git a/xpcom/ds/nsQuickSort.cpp b/xpcom/ds/nsQuickSort.cpp
new file mode 100644
index 0000000000..1fb3dede88
--- /dev/null
+++ b/xpcom/ds/nsQuickSort.cpp
@@ -0,0 +1,175 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+
+/*-
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* We need this because Solaris' version of qsort is broken and
+ * causes array bounds reads.
+ */
+
+#include <stdlib.h>
+#include "nsAlgorithm.h"
+#include "nsQuickSort.h"
+
+extern "C" {
+
+#if !defined(DEBUG) && (defined(__cplusplus) || defined(__gcc))
+#  ifndef INLINE
+#    define INLINE inline
+#  endif
+#else
+#  define INLINE
+#endif
+
+typedef int cmp_t(const void*, const void*, void*);
+static INLINE char* med3(char*, char*, char*, cmp_t*, void*);
+static INLINE void swapfunc(char*, char*, int, int);
+
+/*
+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
+ */
+#define swapcode(TYPE, parmi, parmj, n) \
+  {                                     \
+    long i = (n) / sizeof(TYPE);        \
+    TYPE* pi = (TYPE*)(parmi);          \
+    TYPE* pj = (TYPE*)(parmj);          \
+    do {                                \
+      TYPE t = *pi;                     \
+      *pi++ = *pj;                      \
+      *pj++ = t;                        \
+    } while (--i > 0);                  \
+  }
+
+#define SWAPINIT(a, es)                                                    \
+  swaptype = ((char*)a - (char*)0) % sizeof(long) || es % sizeof(long) ? 2 \
+             : es == sizeof(long)                                      ? 0 \
+                                                                       : 1;
+
+static INLINE void swapfunc(char* a, char* b, int n, int swaptype) {
+  if (swaptype <= 1) swapcode(long, a, b, n) else swapcode(char, a, b, n)
+}
+
+#define swap(a, b)             \
+  if (swaptype == 0) {         \
+    long t = *(long*)(a);      \
+    *(long*)(a) = *(long*)(b); \
+    *(long*)(b) = t;           \
+  } else                       \
+    swapfunc((char*)a, (char*)b, (int)es, swaptype)
+
+#define vecswap(a, b, n) \
+  if ((n) > 0) swapfunc((char*)a, (char*)b, (int)n, swaptype)
+
+static INLINE char* med3(char* a, char* b, char* c, cmp_t* cmp, void* data) {
+  return cmp(a, b, data) < 0
+             ? (cmp(b, c, data) < 0 ? b : (cmp(a, c, data) < 0 ? c : a))
+             : (cmp(b, c, data) > 0 ? b : (cmp(a, c, data) < 0 ? a : c));
+}
+
+void NS_QuickSort(void* a, unsigned int n, unsigned int es, cmp_t* cmp,
+                  void* data) {
+  char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
+  int d, r, swaptype;
+
+loop:
+  SWAPINIT(a, es);
+  /* Use insertion sort when input is small */
+  if (n < 7) {
+    for (pm = (char*)a + es; pm < (char*)a + n * es; pm += es)
+      for (pl = pm; pl > (char*)a && cmp(pl - es, pl, data) > 0; pl -= es)
+        swap(pl, pl - es);
+    return;
+  }
+  /* Choose pivot */
+  pm = (char*)a + (n / 2) * es;
+  if (n > 7) {
+    pl = (char*)a;
+    pn = (char*)a + (n - 1) * es;
+    if (n > 40) {
+      d = (n / 8) * es;
+      pl = med3(pl, pl + d, pl + 2 * d, cmp, data);
+      pm = med3(pm - d, pm, pm + d, cmp, data);
+      pn = med3(pn - 2 * d, pn - d, pn, cmp, data);
+    }
+    pm = med3(pl, pm, pn, cmp, data);
+  }
+  swap(a, pm);
+  pa = pb = (char*)a + es;
+
+  pc = pd = (char*)a + (n - 1) * es;
+  /* loop invariants:
+   * [a, pa) = pivot
+   * [pa, pb) < pivot
+   * [pb, pc + es) unprocessed
+   * [pc + es, pd + es) > pivot
+   * [pd + es, pn) = pivot
+   */
+  for (;;) {
+    while (pb <= pc && (r = cmp(pb, a, data)) <= 0) {
+      if (r == 0) {
+        swap(pa, pb);
+        pa += es;
+      }
+      pb += es;
+    }
+    while (pb <= pc && (r = cmp(pc, a, data)) >= 0) {
+      if (r == 0) {
+        swap(pc, pd);
+        pd -= es;
+      }
+      pc -= es;
+    }
+    if (pb > pc) break;
+    swap(pb, pc);
+    pb += es;
+    pc -= es;
+  }
+  /* Move pivot values */
+  pn = (char*)a + n * es;
+  r = XPCOM_MIN(pa - (char*)a, pb - pa);
+  vecswap(a, pb - r, r);
+  r = XPCOM_MIN<size_t>(pd - pc, pn - pd - es);
+  vecswap(pb, pn - r, r);
+  /* Recursively process partitioned items */
+  if ((r = pb - pa) > (int)es) NS_QuickSort(a, r / es, es, cmp, data);
+  if ((r = pd - pc) > (int)es) {
+    /* Iterate rather than recurse to save stack space */
+    a = pn - r;
+    n = r / es;
+    goto loop;
+  }
+  /*		NS_QuickSort(pn - r, r / es, es, cmp, data);*/
+}
+}
+
+#undef INLINE
+#undef swapcode
+#undef SWAPINIT
+#undef swap
+#undef vecswap