remove sprintf

Most uses of sprintf are
in pathops testing.

Replace them with
SkString::appendf

and replace the remaining
with snprintf

R=scroggo@google.com
BUG=skia:2716
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2391133005

Review-Url: https://codereview.chromium.org/2391133005
diff --git a/tests/PathOpsOpRectThreadedTest.cpp b/tests/PathOpsOpRectThreadedTest.cpp
index 4d672e4..5761572 100644
--- a/tests/PathOpsOpRectThreadedTest.cpp
+++ b/tests/PathOpsOpRectThreadedTest.cpp
@@ -6,6 +6,7 @@
  */
 #include "PathOpsExtendedTest.h"
 #include "PathOpsThreadedCommon.h"
+#include "SkString.h"
 
 // four rects, of four sizes
 // for 3 smaller sizes, tall, wide
@@ -14,46 +15,19 @@
 // not included, square, tall, wide (2 bits)
 // cw or ccw (1 bit)
 
+static int loopNo = 6;
+
 static void testPathOpsRectsMain(PathOpsThreadState* data)
 {
     SkASSERT(data);
     PathOpsThreadState& state = *data;
-    char pathStr[1024];  // gdb: set print elements 400
-    bool progress = state.fReporter->verbose(); // FIXME: break out into its own parameter?
-    if (progress) {
-        sk_bzero(pathStr, sizeof(pathStr));
-    }
+    SkString pathStr;
     for (int a = 0 ; a < 6; ++a) {
         for (int b = a + 1 ; b < 7; ++b) {
             for (int c = 0 ; c < 6; ++c) {
                 for (int d = c + 1 ; d < 7; ++d) {
                     for (int e = SkPath::kWinding_FillType ; e <= SkPath::kEvenOdd_FillType; ++e) {
     for (int f = SkPath::kWinding_FillType ; f <= SkPath::kEvenOdd_FillType; ++f)   {
-        static int testNum = 6;
-        if (progress) {
-            char* str = pathStr;
-            str += sprintf(str,
-                    "static void rects%d(skiatest::Reporter* reporter, const char* filename) {\n",
-                    testNum);
-            str += sprintf(str, "    SkPath path, pathB;");
-            str += sprintf(str, "    path.setFillType(SkPath::k%s_FillType);\n",
-                    e == SkPath::kWinding_FillType ? "Winding" : e == SkPath::kEvenOdd_FillType
-                    ? "EvenOdd" : "?UNDEFINED");
-            str += sprintf(str, "    path.addRect(%d, %d, %d, %d,"
-                    " SkPath::kCW_Direction);\n", state.fA, state.fA, state.fB, state.fB);
-            str += sprintf(str, "    path.addRect(%d, %d, %d, %d,"
-                    " SkPath::kCW_Direction);\n", state.fC, state.fC, state.fD, state.fD);
-            str += sprintf(str, "    pathB.setFillType(SkPath::k%s_FillType);\n",
-                    f == SkPath::kWinding_FillType ? "Winding" : f == SkPath::kEvenOdd_FillType
-                    ? "EvenOdd" : "?UNDEFINED");
-            str += sprintf(str, "    pathB.addRect(%d, %d, %d, %d,"
-                    " SkPath::kCW_Direction);\n", a, a, b, b);
-            str += sprintf(str, "    pathB.addRect(%d, %d, %d, %d,"
-                    " SkPath::kCW_Direction);\n", c, c, d, d);
-            str += sprintf(str,
-                    "    testPathOp(reporter, path, pathB, kDifference_SkPathOp, filename);\n");
-            str += sprintf(str, "}\n\n");
-        }
         SkPath pathA, pathB;
         pathA.setFillType((SkPath::FillType) e);
         pathA.addRect(SkIntToScalar(state.fA), SkIntToScalar(state.fA), SkIntToScalar(state.fB),
@@ -68,13 +42,40 @@
                 SkIntToScalar(d), SkPath::kCW_Direction);
         pathB.close();
         for (int op = 0 ; op <= kXOR_SkPathOp; ++op)    {
-            if (progress) {
-                outputProgress(state.fPathStr, pathStr, (SkPathOp) op);
+            if (state.fReporter->verbose()) {
+                pathStr.printf(
+                        "static void rects%d(skiatest::Reporter* reporter,"
+                        "const char* filename) {\n", loopNo);
+                pathStr.appendf("    SkPath path, pathB;");
+                pathStr.appendf("    path.setFillType(SkPath::k%s_FillType);\n",
+                        e == SkPath::kWinding_FillType ? "Winding" : e == SkPath::kEvenOdd_FillType
+                        ? "EvenOdd" : "?UNDEFINED");
+                pathStr.appendf("    path.addRect(%d, %d, %d, %d,"
+                        " SkPath::kCW_Direction);\n", state.fA, state.fA, state.fB, state.fB);
+                pathStr.appendf("    path.addRect(%d, %d, %d, %d,"
+                        " SkPath::kCW_Direction);\n", state.fC, state.fC, state.fD, state.fD);
+                pathStr.appendf("    pathB.setFillType(SkPath::k%s_FillType);\n",
+                        f == SkPath::kWinding_FillType ? "Winding" : f == SkPath::kEvenOdd_FillType
+                        ? "EvenOdd" : "?UNDEFINED");
+                pathStr.appendf("    pathB.addRect(%d, %d, %d, %d,"
+                        " SkPath::kCW_Direction);\n", a, a, b, b);
+                pathStr.appendf("    pathB.addRect(%d, %d, %d, %d,"
+                        " SkPath::kCW_Direction);\n", c, c, d, d);
+                pathStr.appendf("    testPathOp(reporter, path, pathB, %s, filename);\n",
+                        SkPathOpsDebug::OpStr((SkPathOp) op));
+                pathStr.appendf("}\n\n");
+                outputProgress(state.fPathStr, pathStr.c_str(), (SkPathOp) op);
             }
-            testPathOp(state.fReporter, pathA, pathB, (SkPathOp) op, "rects");
+            if (!testPathOp(state.fReporter, pathA, pathB, (SkPathOp) op, "rects")) {
+                if (state.fReporter->verbose()) {
+                    ++loopNo;
+                    goto skipToNext;
+                }
+            }
         }
     }
                     }
+skipToNext: ;
                 }
             }
         }