Expose in-place decimal integer formatting via FormatDec. Improve performance of CountDigits based on the results from https://github.com/localvoid/cxx-benchmark-count-digits.

2014-02-14 10:36:17 -08:00
parent d473a79581
commit 6f0387fc22
3 changed files with 87 additions and 14 deletions
@@ -1422,6 +1422,20 @@ TEST(FormatIntTest, FormatInt) {
  EXPECT_EQ(os.str(), fmt::FormatInt(std::numeric_limits<int64_t>::max()).str());
 }

+TEST(FormatIntTest, FormatDec) {
+  char buffer[10];
+  char *ptr = buffer;
+  fmt::FormatDec(ptr, 42);
+  EXPECT_EQ(buffer + 2, ptr);
+  *ptr = '\0';
+  EXPECT_STREQ("42", buffer);
+  ptr = buffer;
+  fmt::FormatDec(ptr, -42);
+  *ptr = '\0';
+  EXPECT_EQ(buffer + 3, ptr);
+  EXPECT_STREQ("-42", buffer);
+}
+
 template <typename T>
 std::string str(const T &value) {
  return fmt::str(fmt::Format("{0}") << value);