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authorAndrei Karas <akaras@inbox.ru>2015-06-05 02:20:12 +0300
committerAndrei Karas <akaras@inbox.ru>2015-06-05 02:20:12 +0300
commit54fd7526e6a1d2d161fda10bccd609ec078b8fa9 (patch)
treeb2ef7a31891a0351f1053f6804a8abe4ff1ea895 /src/utils
parentbc4957b24e6939f4e681e9412f9bbdd483a6bc35 (diff)
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Add fast versions for function toString for different types.
Diffstat (limited to 'src/utils')
-rw-r--r--src/utils/stringutils.cpp74
-rw-r--r--src/utils/stringutils.h25
-rw-r--r--src/utils/stringutils_unittest.cc20
3 files changed, 109 insertions, 10 deletions
diff --git a/src/utils/stringutils.cpp b/src/utils/stringutils.cpp
index b4e6e01b0..706135a56 100644
--- a/src/utils/stringutils.cpp
+++ b/src/utils/stringutils.cpp
@@ -709,6 +709,80 @@ std::string toStringPrint(const unsigned int val)
return str;
}
+std::string toString(unsigned int num)
+{
+ char buf[30];
+ buf[29] = '\0';
+ size_t idx = 28;
+ do
+ buf[idx--] = static_cast<char>((num % 10) + '0');
+ while(num /= 10);
+ return buf + idx + 1;
+}
+
+std::string toString(size_t num)
+{
+ char buf[100];
+ buf[99] = '\0';
+ size_t idx = 98;
+ do
+ buf[idx--] = static_cast<char>((num % 10) + '0');
+ while(num /= 10);
+ return buf + idx + 1;
+}
+
+std::string toString(uint16_t num)
+{
+ char buf[10];
+ buf[9] = '\0';
+ size_t idx = 8;
+ do
+ buf[idx--] = static_cast<char>((num % 10) + '0');
+ while(num /= 10);
+ return buf + idx + 1;
+}
+
+std::string toString(unsigned char num)
+{
+ char buf[5];
+ buf[4] = '\0';
+ size_t idx = 3;
+ do
+ buf[idx--] = static_cast<char>((num % 10) + '0');
+ while(num /= 10);
+ return buf + idx + 1;
+}
+
+std::string toString(int num)
+{
+ char buf[30];
+ bool useSign(false);
+ buf[29] = '\0';
+ size_t idx = 28;
+
+ if (num < 0)
+ {
+ useSign = true;
+ num = -num;
+ }
+ do
+ buf[idx--] = static_cast<char>((num % 10) + '0');
+ while(num /= 10);
+ if (useSign)
+ buf[idx--] = '-';
+ return buf + idx + 1;
+}
+
+std::string toString(float num)
+{
+ return strprintf("%f", num);
+}
+
+std::string toString(double num)
+{
+ return strprintf("%f", static_cast<float>(num));
+}
+
bool isDigit(const std::string &str)
{
if (str.empty())
diff --git a/src/utils/stringutils.h b/src/utils/stringutils.h
index da75a42fa..cc479d80c 100644
--- a/src/utils/stringutils.h
+++ b/src/utils/stringutils.h
@@ -64,20 +64,25 @@ std::string &toUpper(std::string &str);
*/
unsigned int atox(const std::string &str) A_WARN_UNUSED;
-template<typename T> std::string toString(const T &arg) A_WARN_UNUSED;
-
/**
- * Converts the given value to a string using std::stringstream.
+ * Converts the given value to a string.
*
- * @param arg the value to convert to a string
+ * @param num the value to convert to a string
* @return the string representation of arg
*/
-template<typename T> std::string toString(const T &arg)
-{
- std::stringstream ss;
- ss << arg;
- return ss.str();
-}
+std::string toString(unsigned int num);
+
+std::string toString(size_t num);
+
+std::string toString(unsigned char num);
+
+std::string toString(int num);
+
+std::string toString(uint16_t num);
+
+std::string toString(float num);
+
+std::string toString(double num);
std::string toStringPrint(const unsigned int val);
diff --git a/src/utils/stringutils_unittest.cc b/src/utils/stringutils_unittest.cc
index f984167a6..4dca829d7 100644
--- a/src/utils/stringutils_unittest.cc
+++ b/src/utils/stringutils_unittest.cc
@@ -117,6 +117,26 @@ TEST_CASE("stringuntils ipToString 1")
REQUIRE("219.255.210.73" == std::string(ipToString(1238564827)));
}
+TEST_CASE("stringuntils toString 1")
+{
+ REQUIRE(strprintf("%d", 0) == toString(0));
+ REQUIRE(strprintf("%d", -1) == toString(-1));
+ REQUIRE(strprintf("%d", 30000000) == toString(30000000));
+ REQUIRE(strprintf("%d", -10000000) == toString(-10000000));
+ REQUIRE(strprintf("%d", 30000000) == toString(
+ static_cast<signed int>(30000000)));
+ REQUIRE(strprintf("%d", 3000) == toString(static_cast<uint16_t>(3000)));
+ REQUIRE(strprintf("%d", 123) == toString(static_cast<unsigned char>(123)));
+}
+
+TEST_CASE("stringuntils toString 2")
+{
+ for (int f = 0; f < 10000000; f += 123)
+ {
+ REQUIRE(strprintf("%d", f) == toString(f));
+ }
+}
+
TEST_CASE("stringuntils removeColors 1")
{
REQUIRE("" == removeColors(""));