c4920bca4a
Fast_float is a C++ header-only library to parse doubles using SIMD instructions. The purpose is to speed up sorted sets and other commands that use doubles. A single-file copy of fast_float is included in this repo. This introduces an optional dependency on a C++ compiler. The use of fast_float is enabled at compile time using the make variable `USE_FAST_FLOAT=yes`. It is disabled by default. Fixes #1069. --------- Signed-off-by: Parth Patel <661497+parthpatel@users.noreply.github.com> Signed-off-by: Parth <661497+parthpatel@users.noreply.github.com> Signed-off-by: Madelyn Olson <madelyneolson@gmail.com> Signed-off-by: Viktor Söderqvist <viktor.soderqvist@est.tech> Co-authored-by: Roshan Swain <swainroshan001@gmail.com> Co-authored-by: Madelyn Olson <madelyneolson@gmail.com> Co-authored-by: Viktor Söderqvist <viktor.soderqvist@est.tech>
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#ifndef FAST_FLOAT_STRTOD_H
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#define FAST_FLOAT_STRTOD_H
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#ifdef USE_FAST_FLOAT
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#include "errno.h"
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/**
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* Converts a null-terminated byte string to a double using the fast_float library.
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*
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* This function provides a C-compatible wrapper around the fast_float library's string-to-double
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* conversion functionality. It aims to offer a faster alternative to the standard strtod function.
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*
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* str: A pointer to the null-terminated byte string to be converted.
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* eptr: On success, stores char pointer pointing to '\0' at the end of the string.
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* On failure, stores char pointer pointing to first invalid character in the string.
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* returns: On success, the function returns the converted double value.
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* On failure, it returns 0.0 and stores error code in errno to ERANGE or EINVAL.
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*
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* note: This function uses the fast_float library (https://github.com/fastfloat/fast_float) for
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* the actual conversion, which can be significantly faster than standard library functions.
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* Refer to "../deps/fast_float_c_interface" for more details.
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* Refer to https://github.com/fastfloat/fast_float for more information on the underlying library.
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*/
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double fast_float_strtod(const char *str, char **endptr);
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static inline double valkey_strtod(const char *str, char **endptr) {
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errno = 0;
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return fast_float_strtod(str, endptr);
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}
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#else
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#include <stdlib.h>
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static inline double valkey_strtod(const char *str, char **endptr) {
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return strtod(str, endptr);
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}
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#endif
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#endif // FAST_FLOAT_STRTOD_H
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