Just use std qsort

Review URL: https://codereview.appspot.com/6195052

git-svn-id: http://skia.googlecode.com/svn/trunk@3846 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkTSearch.h

@@ -167,10 +167,8 @@ private:
     char    fStorage[STORAGE+1];
 };
 
-extern "C" {
-    typedef int (*SkQSortCompareProc)(const void*, const void*);
-    void SkQSort(void* base, size_t count, size_t elemSize, SkQSortCompareProc);
-}
+// Helper when calling qsort with a compare proc that has typed its arguments
+#define SkCastForQSort(compare) reinterpret_cast<int (*)(const void*, const void*)>(compare)
 
 #endif
 

src/core/SkRegion_path.cpp

@@ -462,8 +462,7 @@ bool SkRegion::getBoundaryPath(SkPath* path) const {
         edge[0].set(r.fLeft, r.fBottom, r.fTop);
         edge[1].set(r.fRight, r.fTop, r.fBottom);
     }
-    SkQSort(edges.begin(), edges.count(), sizeof(Edge),
-            (SkQSortCompareProc)EdgeProc);
+    qsort(edges.begin(), edges.count(), sizeof(Edge), SkCastForQSort(EdgeProc));
     
     int count = edges.count();
     Edge* start = edges.begin();

src/core/SkTSearch.cpp

@@ -113,67 +113,3 @@ SkAutoAsciiToLC::~SkAutoAsciiToLC()
     }
 }
 
-//////////////////////////////////////////////////////////////////////////////
-
-#define SK_QSortTempSize    16
-
-static inline void sk_qsort_swap(char a[], char b[], size_t elemSize)
-{
-    char    tmp[SK_QSortTempSize];
-
-    while (elemSize > 0)
-    {
-        size_t size = elemSize;
-        if (size > SK_QSortTempSize)
-            size = SK_QSortTempSize;
-        elemSize -= size;
-
-        memcpy(tmp, a, size);
-        memcpy(a, b, size);
-        memcpy(b, tmp, size);
-        a += size;
-        b += size;
-    }
-}
-
-static void SkQSort_Partition(char* first, char* last, size_t elemSize, SkQSortCompareProc compare)
-{
-    char*   left = first;
-    char*   rite = last;
-    char*   pivot = left;
-
-    while (left <= rite)
-    {
-        while (left < last && compare(left, pivot) < 0)
-            left += elemSize;
-        while (first < rite && compare(rite, pivot) > 0)
-            rite -= elemSize;
-        if (left <= rite)
-        {
-            if (left < rite)
-            {
-                SkASSERT(compare(left, rite) >= 0);
-                sk_qsort_swap(left, rite, elemSize);
-            }
-            left += elemSize;
-            rite -= elemSize;
-        }
-    }
-    if (first < rite)
-        SkQSort_Partition(first, rite, elemSize, compare);
-    if (left < last)
-        SkQSort_Partition(left, last, elemSize, compare);
-}
-
-void SkQSort(void* base, size_t count, size_t elemSize, SkQSortCompareProc compare)
-{
-    SkASSERT(base);
-    SkASSERT(compare);
-    SkASSERT(elemSize > 0);
-
-    if (count <= 1)
-        return;
-
-    SkQSort_Partition((char*)base, (char*)base + (count - 1) * elemSize, elemSize, compare);
-}
-

src/gpu/gl/GrGLCaps.cpp

@@ -200,12 +200,10 @@ void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo) {
                               (int*)&fMSAACoverageModes[0]);
             // The NV driver seems to return the modes already sorted but the
             // spec doesn't require this. So we sort.
-            SkQSortCompareProc compareProc =
-                reinterpret_cast<SkQSortCompareProc>(&coverage_mode_compare);
-            SkQSort(&fMSAACoverageModes[0],
+            qsort(&fMSAACoverageModes[0],
                     count,
                     sizeof(MSAACoverageMode),
-                    compareProc);
+                    SkCastForQSort(coverage_mode_compare));
         }
     }
     if (kNone_MSFBOType != fMSFBOType) {

tests/SortTest.cpp

@@ -7,7 +7,6 @@
  */
 #include "Test.h"
 #include "SkRandom.h"
-#include "SkTSearch.h"
 #include "SkTSort.h"
 
 extern "C" {
@@ -41,10 +40,6 @@ static void TestSort(skiatest::Reporter* reporter) {
     for (int i = 0; i < 10000; i++) {
         int count = rand.nextRangeU(1, SK_ARRAY_COUNT(array));
 
-        rand_array(rand, array, count);
-        SkQSort(array, count, sizeof(int), compare_int);
-        check_sort(reporter, "Quick", array, count);
-
         rand_array(rand, array, count);
         SkTHeapSort<int>(array, count);
         check_sort(reporter, "Heap", array, count);

tools/skdiff_main.cpp

@@ -572,8 +572,6 @@ static void create_diff_images (DiffMetricProc dmp,
                                 DiffSummary* summary) {
     SkASSERT(!baseDir.isEmpty());
     SkASSERT(!comparisonDir.isEmpty());
-    SkQSortCompareProc sortFileProc =
-            (SkQSortCompareProc)compare_file_name_metrics;
 
     FileArray baseFiles;
     FileArray comparisonFiles;
@@ -583,12 +581,12 @@ static void create_diff_images (DiffMetricProc dmp,
                   &comparisonFiles);
 
     if (!baseFiles.isEmpty()) {
-        SkQSort(baseFiles.begin(), baseFiles.count(),
-                sizeof(SkString*), sortFileProc);
+        qsort(baseFiles.begin(), baseFiles.count(), sizeof(SkString*),
+              SkCastForQSort(compare_file_name_metrics));
     }
     if (!comparisonFiles.isEmpty()) {
-        SkQSort(comparisonFiles.begin(), comparisonFiles.count(),
-                sizeof(SkString*), sortFileProc);
+        qsort(comparisonFiles.begin(), comparisonFiles.count(),
+              sizeof(SkString*), SkCastForQSort(compare_file_name_metrics));
     }
     
     int i = 0;
@@ -1002,7 +1000,7 @@ argv0, argv0);
 
 int main (int argc, char ** argv) {
     DiffMetricProc diffProc = compute_diff_pmcolor;
-    SkQSortCompareProc sortProc = (SkQSortCompareProc) compare_diff_metrics;
+    int (*sortProc)(const void*, const void*) = SkCastForQSort(compare_diff_metrics);
 
     // Maximum error tolerated in any one color channel in any one pixel before
     // a difference is reported.
@@ -1045,15 +1043,15 @@ int main (int argc, char ** argv) {
             continue;
         }
         if (!strcmp(argv[i], "--sortbymismatch")) {
-            sortProc = (SkQSortCompareProc) compare_diff_mean_mismatches;
+            sortProc = SkCastForQSort(compare_diff_mean_mismatches);
             continue;
         }
         if (!strcmp(argv[i], "--sortbymaxmismatch")) {
-            sortProc = (SkQSortCompareProc) compare_diff_max_mismatches;
+            sortProc = SkCastForQSort(compare_diff_max_mismatches);
             continue;
         }
         if (!strcmp(argv[i], "--weighted")) {
-            sortProc = (SkQSortCompareProc) compare_diff_weighted;
+            sortProc = SkCastForQSort(compare_diff_weighted);
             continue;
         }
         if (!strcmp(argv[i], "--chromium-release")) {
@@ -1158,7 +1156,7 @@ int main (int argc, char ** argv) {
     summary.print();
 
     if (differences.count()) {
-        SkQSort(differences.begin(), differences.count(),
+        qsort(differences.begin(), differences.count(),
               sizeof(DiffRecord*), sortProc);
     }