COMPMID-3069: Improve build time by splitting up ToolchainSupport.h

Split out the parts of ToolchainSupport coming from <memory> and
the parts coming from <string> into their own new header files.
This accounts for 99% of uses of ToolchainSupport, which means that
expensive header files such as arm_neon.h don't need to be included
everywhere.

Knocks about 10% of compilation time off kernel files.

Signed-off-by: Matthew Bentham <matthew.bentham@arm.com>
Change-Id: I2ae718fe766b5ff28608812b0f686f30eeac1b21
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2852
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>

1 files changed, 194 insertions, 0 deletions

diff --git a/support/StringSupport.h b/support/StringSupport.h
new file mode 100644
index 0000000000..2bd398753f
--- /dev/null
+++ b/support/StringSupport.h
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2017-2020 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_TEST_STRINGSUPPORT
+#define ARM_COMPUTE_TEST_STRINGSUPPORT
+
+#include <cassert>
+#include <memory>
+#include <sstream>
+#include <string>
+
+namespace arm_compute
+{
+namespace support
+{
+namespace cpp11
+{
+enum class NumericBase
+{
+    BASE_10,
+    BASE_16
+};
+
+/** Convert string values to integer.
+ *
+ * @note This function implements the same behaviour as std::stoi. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str  String to be converted to int.
+ * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
+ * @param[in] base Numeric base used to interpret the string.
+ *
+ * @return Integer representation of @p str.
+ */
+inline int stoi(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
+{
+    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
+    unsigned int      x;
+    std::stringstream ss;
+    if(base == NumericBase::BASE_16)
+    {
+        ss << std::hex;
+    }
+    ss << str;
+    ss >> x;
+
+    if(pos)
+    {
+        std::string       s;
+        std::stringstream ss_p;
+
+        ss_p << x;
+        ss_p >> s;
+        *pos = s.length();
+    }
+
+    return x;
+}
+
+/** Convert string values to unsigned long.
+ *
+ * @note This function implements the same behaviour as std::stoul. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str  String to be converted to unsigned long.
+ * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
+ * @param[in] base Numeric base used to interpret the string.
+ *
+ * @return Unsigned long representation of @p str.
+ */
+inline unsigned long stoul(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
+{
+    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
+    std::stringstream stream;
+    unsigned long     value = 0;
+    if(base == NumericBase::BASE_16)
+    {
+        stream << std::hex;
+    }
+    stream << str;
+    stream >> value;
+
+    if(pos)
+    {
+        std::string       s;
+        std::stringstream ss_p;
+
+        ss_p << value;
+        ss_p >> s;
+        *pos = s.length();
+    }
+
+    return value;
+}
+
+#if(__ANDROID__ || BARE_METAL)
+/** Convert integer and float values to string.
+ *
+ * @note This function implements the same behaviour as std::to_string. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] value Value to be converted to string.
+ *
+ * @return String representation of @p value.
+ */
+template <typename T, typename std::enable_if<std::is_arithmetic<typename std::decay<T>::type>::value, int>::type = 0>
+inline std::string to_string(T && value)
+{
+    std::stringstream stream;
+    stream << std::forward<T>(value);
+    return stream.str();
+}
+
+/** Convert string values to float.
+ *
+ * @note This function implements the same behaviour as std::stof. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str String to be converted to float.
+ *
+ * @return Float representation of @p str.
+ */
+inline float stof(const std::string &str)
+{
+    std::stringstream stream(str);
+    float             value = 0.f;
+    stream >> value;
+    return value;
+}
+
+#else /* (__ANDROID__ || BARE_METAL) */
+/** Convert integer and float values to string.
+ *
+ * @note This function acts as a convenience wrapper around std::to_string. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] value Value to be converted to string.
+ *
+ * @return String representation of @p value.
+ */
+template <typename T>
+inline std::string to_string(T &&value)
+{
+    return ::std::to_string(std::forward<T>(value));
+}
+
+/** Convert string values to float.
+ *
+ * @note This function acts as a convenience wrapper around std::stof. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] args Arguments forwarded to std::stof.
+ *
+ * @return Float representation of input string.
+ */
+template <typename... Ts>
+int stof(Ts &&... args)
+{
+    return ::std::stof(std::forward<Ts>(args)...);
+}
+
+#endif /* (__ANDROID__ || BARE_METAL) */
+
+inline std::string to_string(bool value)
+{
+    std::stringstream str;
+    str << std::boolalpha << value;
+    return str.str();
+}
+
+} // namespace cpp11
+} // namespace support
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_STRINGSUPPORT */