Add Redis source code for testing

1 files changed, 32 insertions, 0 deletions

diff --git a/examples/redis-unstable/deps/fast_float/fast_float_strtod.cpp b/examples/redis-unstable/deps/fast_float/fast_float_strtod.cpp
new file mode 100644
index 0000000..7f4235c
--- /dev/null
+++ b/examples/redis-unstable/deps/fast_float/fast_float_strtod.cpp
@@ -0,0 +1,32 @@
+#include "fast_float.h"
+#include <iostream>
+#include <string>
+#include <system_error>
+#include <cerrno>
+
+/* Convert NPTR to a double using the fast_float library.
+ *
+ * This function behaves similarly to the standard strtod function, converting
+ * the initial portion of the string pointed to by `nptr` to a `double` value,
+ * using the fast_float library for high performance. If the conversion fails,
+ * errno is set to EINVAL error code.
+ *
+ * @param nptr   A pointer to the null-terminated byte string to be interpreted.
+ * @param endptr A pointer to a pointer to character. If `endptr` is not NULL,
+ *               it will point to the character after the last character used
+ *               in the conversion.
+ * @return       The converted value as a double. If no valid conversion could
+ *               be performed, returns 0.0.
+ * If ENDPTR is not NULL, a pointer to the character after the last one used
+ * in the number is put in *ENDPTR.  */
+extern "C" double fast_float_strtod(const char *nptr, char **endptr) {
+  double result = 0.0;
+  auto answer = fast_float::from_chars(nptr, nptr + strlen(nptr), result);
+  if (answer.ec != std::errc()) {
+    errno = EINVAL;  // Fallback to  for other errors
+  }
+  if (endptr != NULL) {
+    *endptr = (char *)answer.ptr;
+  }
+  return result;
+}