_parse_integer_limit(9)

okay bestie, say hi to _parse_integer_limit(9) from the Kernel API Manual ✨ this one is a lowkey workhorse, but we’re gonna get through it together, fr fr 💅

🎀 NAME 🎀

_parse_integer_limit — convert integer string representation to an integer 🧮✨

🌸 SYNOPSIS 🌸

unsigned int _parse_integer_limit (const char *s , unsigned int base ,
       unsigned long long *p , size_t max_chars , unsigned long long init );

🦋 ARGUMENTS 🦋

• s — Integer string representation. the string bestie, the main character of this conversion 💖
• base — Radix. yes, the radix 🧮✨
• p — Where to store result. this is where the result goes 👑
• max_chars — Maximum amount of characters to convert. literally the max amount of characters to convert 🔥
• init — Initial value of the multiply-accumulate result. the starting value for the multiply-accumulate situation 🫶

💜 DESCRIPTION 💜

okay so what it does: it converts a non-negative integer string representation in an explicitly given radix to an integer. If overflow occurs, the value at p is set to ULLONG_MAX 🚨😭

also important: this function is the workhorse of other string conversion functions, and it is discouraged to use it explicitly. Consider the kstrto*() family instead. iykyk 💅✨

🌈 RETURN 🌈

Number of characters consumed, maybe ORed with overflow bit 👀💫

⭐ SEE ALSO ⭐

Kernel file ./lib/kstrtox.c and the gang: kstrtoull(9), kstrtoll(9), kstrtouint(9), kstrtoint(9), kstrtobool(9), kstrtoudec64(9), kstrtodec64(9) 🫶 go read those if you’re being a good bestie 🦋

mwah 💋 — source/version: ./lib, date: October 2026, signing off from the Kernel API Manual girlies 🎀🌸