rte_approx.h(3)

💖 rte_approx.h 💖

hiii bestie, welcome to the rte_approx.h page — it's part of the Library Functions Manual, section 3, and it's literally the cutest lil corner of DPDK where we do rational approximation math. no cap. let's get into it 🦋

---

✨ NAME ✨

rte_approx.h

that's it, that's the name, she's self-titled and she knows it 💅

---

🌸 SYNOPSIS 🌸

the one and only thing you gotta include:

#include <stdint.h>

🎀 Functions 🎀

two icons, both of them:

int rte_approx (double alpha, double d, uint32_t *p, uint32_t *q)
int rte_approx_64 (double alpha, double d, uint64_t *p, uint64_t *q)

---

💜 Detailed Description 💜

RTE Rational Approximation

ok so picture this: you hand me a rational number alpha, where 0 < alpha < 1, plus a precision d. the goal, the mission, the whole vibe, is to find positive integers p and q such that

alpha - d < p/q < alpha + d

and, and this is the important part, q is minimal. minimal denominator, maximal slay. ✨

📌 Definition in file rte_approx.h.

---

🧚 Function Documentation 🧚

int rte_approx (double alpha, double d, uint32_t * p, uint32_t * q)

Find best rational approximation — the 32-bit girly 🫶

Parameters

• alpha — the rational number you want to approximate
• d — the precision you want for the rational approximation
• p — pointer to pre-allocated space where the numerator of the rational approximation will be stored when the operation is successful
• q — pointer to pre-allocated space where the denominator of the rational approximation will be stored when the operation is successful

Returns

0 upon success, error code otherwise 😭 (yes we do error codes here, it's giving responsible)

---

int rte_approx_64 (double alpha, double d, uint64_t * p, uint64_t * q)

Find best rational approximation (64 bit version) — same energy, bigger numbers, main character vibes 👑

Parameters

• alpha — the rational number you want to approximate
• d — the precision you want for the rational approximation
• p — pointer to pre-allocated space where the numerator of the rational approximation will be stored when the operation is successful
• q — pointer to pre-allocated space where the denominator of the rational approximation will be stored when the operation is successful

Returns

0 upon success, error code otherwise 💀 (same deal, stay safe out there)

---

👑 Author 👑

Generated automatically by Doxygen for DPDK from the source code. so technically Doxygen wrote this, not a person, and honestly? it ate. 🤖✨

---

aaaand that's the whole page, bestie!! this was rte_approx.h from DPDK, Version 25.11.3 — mwah, go approximate something gorgeous, ily 💖🎀🦋🌸💅