avr_stdint(3avr)
✨ NAME ✨
okay so welcome to avr_stdint, aka the manual page for <stdint.h> 💖 — the Standard Integer Types. bestie, this is your one-stop shop for "i want a number that is exactly this many bits and nothing weird is gonna happen to it, i promise." 🎀
🌸 SYNOPSIS 🌸
🍓 Exact-width integer types
Integer types having exactly the specified width — no more, no less, no wiggle room 👑
typedef signed char int8_t
typedef unsigned char uint8_t
typedef signed int int16_t
typedef unsigned int uint16_t
typedef signed long int int32_t
typedef unsigned long int uint32_t
typedef signed long long int int64_t
typedef unsigned long long int uint64_t🦋 Integer types capable of holding object pointers
These allow you to declare variables of the same size as a pointer. yes they're just pointers but as integers, it's giving "i contain multitudes" ✨
typedef int16_t intptr_t
typedef uint16_t uintptr_t🌈 Minimum-width integer types
Integer types having at least the specified width — the bare minimum, but make it fashion 💅
typedef int8_t int_least8_t
typedef uint8_t uint_least8_t
typedef int16_t int_least16_t
typedef uint16_t uint_least16_t
typedef int32_t int_least32_t
typedef uint32_t uint_least32_t
typedef int64_t int_least64_t
typedef uint64_t uint_least64_t🌸 Fastest minimum-width integer types
Integer types being usually fastest having at least the specified width — speed, but only probably. it's giving vibes not guarantees 😭
typedef int8_t int_fast8_t
typedef uint8_t uint_fast8_t
typedef int16_t int_fast16_t
typedef uint16_t uint_fast16_t
typedef int32_t int_fast32_t
typedef uint32_t uint_fast32_t
typedef int64_t int_fast64_t
typedef uint64_t uint_fast64_t👑 Greatest-width integer types
Types designating integer data capable of representing any value of any integer type in the corresponding signed or unsigned category — the main character of ints, tbh 🫶
typedef int64_t intmax_t
typedef uint64_t uintmax_t💜 Limits of specified-width integer types
C++ implementations should define these macros only when __STDC_LIMIT_MACROS is defined before <stdint.h> is included. (yes this is the rules, write it down 📝)
#define INT8_MAX 0x7f
#define INT8_MIN (-INT8_MAX - 1)
#define UINT8_MAX (INT8_MAX * 2 + 1)
#define INT16_MAX 0x7fff
#define INT16_MIN (-INT16_MAX - 1)
#define UINT16_MAX (__CONCAT(INT16_MAX, U) * 2U + 1U)
#define INT32_MAX 0x7fffffffL
#define INT32_MIN (-INT32_MAX - 1L)
#define UINT32_MAX (__CONCAT(INT32_MAX, U) * 2UL + 1UL)
#define INT64_MAX 0x7fffffffffffffffLL
#define INT64_MIN (-INT64_MAX - 1LL)
#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)🎀 Limits of minimum-width integer types
#define INT_LEAST8_MAX INT8_MAX
#define INT_LEAST8_MIN INT8_MIN
#define UINT_LEAST8_MAX UINT8_MAX
#define INT_LEAST16_MAX INT16_MAX
#define INT_LEAST16_MIN INT16_MIN
#define UINT_LEAST16_MAX UINT16_MAX
#define INT_LEAST32_MAX INT32_MAX
#define INT_LEAST32_MIN INT32_MIN
#define UINT_LEAST32_MAX UINT32_MAX
#define INT_LEAST64_MAX INT64_MAX
#define INT_LEAST64_MIN INT64_MIN
#define UINT_LEAST64_MAX UINT64_MAX⭐ Limits of fastest minimum-width integer types
#define INT_FAST8_MAX INT8_MAX
#define INT_FAST8_MIN INT8_MIN
#define UINT_FAST8_MAX UINT8_MAX
#define INT_FAST16_MAX INT16_MAX
#define INT_FAST16_MIN INT16_MIN
#define UINT_FAST16_MAX UINT16_MAX
#define INT_FAST32_MAX INT32_MAX
#define INT_FAST32_MIN INT32_MIN
#define UINT_FAST32_MAX UINT32_MAX
#define INT_FAST64_MAX INT64_MAX
#define INT_FAST64_MIN INT64_MIN
#define UINT_FAST64_MAX UINT64_MAX🔥 Limits of integer types capable of holding object pointers
#define INTPTR_MAX INT16_MAX
#define INTPTR_MIN INT16_MIN
#define UINTPTR_MAX UINT16_MAX💖 Limits of greatest-width integer types
#define INTMAX_MAX INT64_MAX
#define INTMAX_MIN INT64_MIN
#define UINTMAX_MAX UINT64_MAX🌸 Limits of other integer types
C++ implementations should define these macros only when __STDC_LIMIT_MACROS is defined before <stdint.h> is included. (same rule, different macros, we stay consistent 💅)
#define PTRDIFF_MAX INT16_MAX
#define PTRDIFF_MIN INT16_MIN
#define SIG_ATOMIC_MAX INT8_MAX
#define SIG_ATOMIC_MIN INT8_MIN
#define SIZE_MAX UINT16_MAX
#define WCHAR_MAX __WCHAR_MAX__
#define WCHAR_MIN __WCHAR_MIN__
#define WINT_MAX __WINT_MAX__
#define WINT_MIN __WINT_MIN__🧚 Macros for integer constants
C++ implementations should define these macros only when __STDC_CONSTANT_MACROS is defined before <stdint.h> is included.
These definitions are valid for integer constants without suffix and for macros defined as integer constant without suffix 👑
#define INT8_C(value)
#define UINT8_C(value)
#define INT16_C(value)
#define UINT16_C(value)
#define INT32_C(value)
#define UINT32_C(value)
#define INT64_C(value)
#define UINT64_C(value)
#define INTMAX_C(value)
#define UINTMAX_C(value)💜 Detailed Description 💜
#include <stdint.h>Use [u]intN_t if you need exactly N bits. no cap, that's the whole point 🎯
Since these typedefs are mandated by the C99 standard, they are preferred over rolling your own typedefs. like bestie please do not hand-craft your own, the standard already did it for you and she ate 🔥
👑 Macro Definition Documentation 👑
buckle up, this is the long part, but every single one of these is important so we're reading all of them, periodt 💅
🍓 #define INT16_C( value)
Value:
valuedefine a constant of type int16_t ✨
🌸 #define INT16_MAX 0x7fff
largest positive value an int16_t can hold.
🦋 #define INT16_MIN (-INT16_MAX - 1)
smallest negative value an int16_t can hold.
🎀 #define INT32_C( value)
Value:
__CONCAT(value, L)define a constant of type int32_t ✨
💖 #define INT32_MAX 0x7fffffffL
largest positive value an int32_t can hold.
💜 #define INT32_MIN (-INT32_MAX - 1L)
smallest negative value an int32_t can hold.
⭐ #define INT64_C( value)
Value:
__CONCAT(value, LL)define a constant of type int64_t ✨
👑 #define INT64_MAX 0x7fffffffffffffffLL
largest positive value an int64_t can hold.
🌈 #define INT64_MIN (-INT64_MAX - 1LL)
smallest negative value an int64_t can hold.
🧚 #define INT8_C( value)
Value:
((int8_t) value)define a constant of type int8_t ✨
🌸 #define INT8_MAX 0x7f
largest positive value an int8_t can hold.
🍓 #define INT8_MIN (-INT8_MAX - 1)
smallest negative value an int8_t can hold.
🦋 #define INT_FAST16_MAX INT16_MAX
largest positive value an int_fast16_t can hold.
🎀 #define INT_FAST16_MIN INT16_MIN
smallest negative value an int_fast16_t can hold.
💖 #define INT_FAST32_MAX INT32_MAX
largest positive value an int_fast32_t can hold.
💜 #define INT_FAST32_MIN INT32_MIN
smallest negative value an int_fast32_t can hold.
⭐ #define INT_FAST64_MAX INT64_MAX
largest positive value an int_fast64_t can hold.
👑 #define INT_FAST64_MIN INT64_MIN
smallest negative value an int_fast64_t can hold.
🌈 #define INT_FAST8_MAX INT8_MAX
largest positive value an int_fast8_t can hold.
🧚 #define INT_FAST8_MIN INT8_MIN
smallest negative value an int_fast8_t can hold.
🌸 #define INT_LEAST16_MAX INT16_MAX
largest positive value an int_least16_t can hold.
🍓 #define INT_LEAST16_MIN INT16_MIN
smallest negative value an int_least16_t can hold.
🦋 #define INT_LEAST32_MAX INT32_MAX
largest positive value an int_least32_t can hold.
🎀 #define INT_LEAST32_MIN INT32_MIN
smallest negative value an int_least32_t can hold.
💖 #define INT_LEAST64_MAX INT64_MAX
largest positive value an int_least64_t can hold.
💜 #define INT_LEAST64_MIN INT64_MIN
smallest negative value an int_least64_t can hold.
⭐ #define INT_LEAST8_MAX INT8_MAX
largest positive value an int_least8_t can hold.
👑 #define INT_LEAST8_MIN INT8_MIN
smallest negative value an int_least8_t can hold.
🌈 #define INTMAX_C( value)
Value:
__CONCAT(value, LL)define a constant of type intmax_t ✨
🧚 #define INTMAX_MAX INT64_MAX
largest positive value an intmax_t can hold.
🌸 #define INTMAX_MIN INT64_MIN
smallest negative value an intmax_t can hold.
🍓 #define INTPTR_MAX INT16_MAX
largest positive value an intptr_t can hold.
🦋 #define INTPTR_MIN INT16_MIN
smallest negative value an intptr_t can hold.
🎀 #define PTRDIFF_MAX INT16_MAX
largest positive value a ptrdiff_t can hold.
💖 #define PTRDIFF_MIN INT16_MIN
smallest negative value a ptrdiff_t can hold.
💜 #define SIG_ATOMIC_MAX INT8_MAX
largest positive value a sig_atomic_t can hold.
⭐ #define SIG_ATOMIC_MIN INT8_MIN
smallest negative value a sig_atomic_t can hold.
👑 #define SIZE_MAX UINT16_MAX
largest value a size_t can hold.
🌈 #define UINT16_C( value)
Value:
__CONCAT(value, U)define a constant of type uint16_t ✨
🧚 #define UINT16_MAX (__CONCAT(INT16_MAX, U) * 2U + 1U)
largest value an uint16_t can hold.
🌸 #define UINT32_C( value)
Value:
__CONCAT(value, UL)define a constant of type uint32_t ✨
🍓 #define UINT32_MAX (__CONCAT(INT32_MAX, U) * 2UL + 1UL)
largest value an uint32_t can hold.
🦋 #define UINT64_C( value)
Value:
__CONCAT(value, ULL)define a constant of type uint64_t ✨
🎀 #define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)
largest value an uint64_t can hold.
💖 #define UINT8_C( value)
Value:
((uint8_t) __CONCAT(value, U))define a constant of type uint8_t ✨
💜 #define UINT8_MAX (INT8_MAX * 2 + 1)
largest value an uint8_t can hold.
⭐ #define UINT_FAST16_MAX UINT16_MAX
largest value an uint_fast16_t can hold.
👑 #define UINT_FAST32_MAX UINT32_MAX
largest value an uint_fast32_t can hold.
🌈 #define UINT_FAST64_MAX UINT64_MAX
largest value an uint_fast64_t can hold.
🧚 #define UINT_FAST8_MAX UINT8_MAX
largest value an uint_fast8_t can hold.
🌸 #define UINT_LEAST16_MAX UINT16_MAX
largest value an uint_least16_t can hold.
🍓 #define UINT_LEAST32_MAX UINT32_MAX
largest value an uint_least32_t can hold.
🦋 #define UINT_LEAST64_MAX UINT64_MAX
largest value an uint_least64_t can hold.
🎀 #define UINT_LEAST8_MAX UINT8_MAX
largest value an uint_least8_t can hold.
💖 #define UINTMAX_C( value)
Value:
__CONCAT(value, ULL)define a constant of type uintmax_t ✨
💜 #define UINTMAX_MAX UINT64_MAX
largest value an uintmax_t can hold.
⭐ #define UINTPTR_MAX UINT16_MAX
largest value an uintptr_t can hold.
✨ Typedef Documentation ✨
okay bestie, here's the full typedef lineup — every single one, no skips, fr fr. 💅
typedef signed int int16_t— 16-bit signed type. 💖typedef signed long int int32_t— 32-bit signed type. ✨typedef signed long long int int64_t— 64-bit signed type. 🦋
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef signed char int8_t— 8-bit signed type. 🌸typedef int16_t int_fast16_t— fastest signed int with at least 16 bits. 💅typedef int32_t int_fast32_t— fastest signed int with at least 32 bits. 💅typedef int64_t int_fast64_t— fastest signed int with at least 64 bits. 💅
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef int8_t int_fast8_t— fastest signed int with at least 8 bits. 💅typedef int16_t int_least16_t— signed int with at least 16 bits. 🎀typedef int32_t int_least32_t— signed int with at least 32 bits. 🎀typedef int64_t int_least64_t— signed int with at least 64 bits. 🎀
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef int8_t int_least8_t— signed int with at least 8 bits. 🎀typedef int64_t intmax_t— largest signed int available. 👑typedef int16_t intptr_t— Signed pointer compatible type. 🫶typedef unsigned int uint16_t— 16-bit unsigned type. 💜typedef unsigned long int uint32_t— 32-bit unsigned type. 💜typedef unsigned long long int uint64_t— 64-bit unsigned type. 💜
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef unsigned char uint8_t— 8-bit unsigned type. 💜typedef uint16_t uint_fast16_t— fastest unsigned int with at least 16 bits. 🌈typedef uint32_t uint_fast32_t— fastest unsigned int with at least 32 bits. 🌈typedef uint64_t uint_fast64_t— fastest unsigned int with at least 64 bits. 🌈
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef uint8_t uint_fast8_t— fastest unsigned int with at least 8 bits. 🌈typedef uint16_t uint_least16_t— unsigned int with at least 16 bits. ⭐typedef uint32_t uint_least32_t— unsigned int with at least 32 bits. ⭐typedef uint64_t uint_least64_t— unsigned int with at least 64 bits. ⭐
🚨 Note: This type is not available when the compiler option -mint8 is in effect.
typedef uint8_t uint_least8_t— unsigned int with at least 8 bits. ⭐typedef uint64_t uintmax_t— largest unsigned int available. 👑typedef uint16_t uintptr_t— Unsigned pointer compatible type. 🫶
👑 Author 👑
Generated automatically by Doxygen for AVR-LibC from the source code. ✨
💖 source/version: AVR-LibC, version 2.2.1 — page: avr_stdint(3avr). date: this footer didn't give one, so we're just gonna say it's timeless, bestie. ✨🦋
📦 where this page comes from
- ubuntu resolute: avr-libc 1:2.2.1-1build1 · BSD-3-Clause
- ubuntu stonking: avr-libc 1:2.2.1-1build1 · BSD-3-Clause
- 💖 girlified by deepseek-ai/DeepSeek-V4.1-Flash on : a language model's rewrite of the original, under its terms