Added `nanoprintf.h` header only library to implement `::to_string` functions.

 * `eastl::to_string` does not work for now

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

1 files changed, 120 insertions, 0 deletions

diff --git a/CRT/eastl_compat.cpp b/CRT/eastl_compat.cpp
new file mode 100644
index 0000000..43068b3
--- /dev/null
+++ b/CRT/eastl_compat.cpp
@@ -0,0 +1,120 @@
+#include "eastl_compat.hpp"
+
+#define NANOPRINTF_VISIBILITY_STATIC 1
+#define NANOPRINTF_USE_FLOAT_FORMAT_SPECIFIERS 1
+#define NANOPRINTF_USE_PRECISION_FORMAT_SPECIFIERS 1
+#define NANOPRINTF_USE_FIELD_WIDTH_FORMAT_SPECIFIERS 1
+#define NANOPRINTF_USE_LARGE_FORMAT_SPECIFIERS 1
+#define NANOPRINTF_USE_BINARY_FORMAT_SPECIFIERS 0
+#define NANOPRINTF_USE_WRITEBACK_FORMAT_SPECIFIERS 0
+#define NANOPRINTF_IMPLEMENTATION 1
+#include "nanoprintf.h"
+
+/*
+ * eastl::to_string(...) does not work yet event if with a provided Vsnprintf/Vsnprintf8
+ * The issue seems to be caused by a broken va_list/va_copy.
+ */
+
+eastl::string to_string(int value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%d", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%d", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(long value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%ld", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%ld", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(long long value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%lld", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%lld", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(unsigned int value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%u", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%u", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(unsigned long int value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%lu", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%lu", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(unsigned long long int value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%llu", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%llu", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(float value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%f", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%f", value);
+        return result;
+    }
+    else
+        return "";
+}
+
+eastl::string to_string(double value)
+{
+    int nbytes = npf_snprintf(nullptr, 0, "%lf", value);
+    if (nbytes > 0)
+    {
+        char result[nbytes + 1] = {};
+        npf_snprintf(result, nbytes, "%lf", value);
+        return result;
+    }
+    else
+        return "";
+}