misc/libphysfs/lzma/C/Sort.c
author nemo
Mon, 10 Apr 2017 12:06:43 -0400
changeset 12213 bb5522e88ab2
permissions -rw-r--r--
bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
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/* Sort.c */
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#include "Sort.h"
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#define HeapSortDown(p, k, size, temp) \
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  { for (;;) { \
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    UInt32 s = (k << 1); \
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    if (s > size) break; \
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    if (s < size && p[s + 1] > p[s]) s++; \
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    if (temp >= p[s]) break; \
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    p[k] = p[s]; k = s; \
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  } p[k] = temp; }
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void HeapSort(UInt32 *p, UInt32 size)
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{
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  if (size <= 1)
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    return;
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  p--;
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  {
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    UInt32 i = size / 2;
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    do
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    {
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      UInt32 temp = p[i];
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      UInt32 k = i;
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      HeapSortDown(p, k, size, temp)
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    }
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    while(--i != 0);
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  }
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  /*
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  do
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  {
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    UInt32 k = 1;
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    UInt32 temp = p[size];
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    p[size--] = p[1];
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    HeapSortDown(p, k, size, temp)
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  }
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  while (size > 1);
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  */
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  while (size > 3)
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  {
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    UInt32 temp = p[size];
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    UInt32 k = (p[3] > p[2]) ? 3 : 2;
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    p[size--] = p[1];
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    p[1] = p[k]; 
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    HeapSortDown(p, k, size, temp)
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  }
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  {
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    UInt32 temp = p[size];
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    p[size] = p[1];
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    if (size > 2 && p[2] < temp)
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    {
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      p[1] = p[2];
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      p[2] = temp;
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    }
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    else
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      p[1] = temp;
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  }
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}
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/*
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#define HeapSortRefDown(p, vals, n, size, temp) \
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  { UInt32 k = n; UInt32 val = vals[temp]; for (;;) { \
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    UInt32 s = (k << 1); \
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    if (s > size) break; \
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    if (s < size && vals[p[s + 1]] > vals[p[s]]) s++; \
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    if (val >= vals[p[s]]) break; \
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    p[k] = p[s]; k = s; \
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  } p[k] = temp; }
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void HeapSortRef(UInt32 *p, UInt32 *vals, UInt32 size)
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{
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  if (size <= 1)
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    return;
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  p--;
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  {
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    76
    UInt32 i = size / 2;
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    77
    do
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    78
    {
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    79
      UInt32 temp = p[i];
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    80
      HeapSortRefDown(p, vals, i, size, temp);
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    81
    }
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    82
    while(--i != 0);
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    83
  }
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    84
  do
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    85
  {
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    86
    UInt32 temp = p[size];
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    87
    p[size--] = p[1];
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    88
    HeapSortRefDown(p, vals, 1, size, temp);
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    89
  }
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    90
  while (size > 1);
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    91
}
bb5522e88ab2 bulk copy of latest physfs to our misc/libphysfs since this seems to fix an off-by-1 error reliably hit in readln read of 1 byte probably introduced in the addition of the buffered read. Whether this is excessive or whether libphysfs should even be maintained by us is another matter. But at least we shouldn't crash
nemo
parents:
diff changeset
    92
*/