cu/int.h: Integer Functions
[Data Types]
Defines | |
| #define | cu_uint16_ntoh cu_uint16_hton |
| #define | cu_uint32_ntoh cu_uint32_hton |
Functions | |
| int | cu_int_min (int x, int y) |
| int | cu_int_max (int x, int y) |
| unsigned int | cu_uint_min (unsigned int x, unsigned int y) |
| unsigned int | cu_uint_max (unsigned int x, unsigned int y) |
| long | cu_long_min (long x, long y) |
| long | cu_long_max (long x, long y) |
| unsigned long | cu_ulong_min (unsigned long x, unsigned long y) |
| unsigned long | cu_ulong_max (unsigned long x, unsigned long y) |
| intptr_t | cu_intptr_min (intptr_t x, intptr_t y) |
| intptr_t | cu_intptr_max (intptr_t x, intptr_t y) |
| uintptr_t | cu_uintptr_min (uintptr_t x, uintptr_t y) |
| uintptr_t | cu_uintptr_max (uintptr_t x, uintptr_t y) |
| int | cu_int_abs (int x) |
| long | cu_long_abs (long x) |
| int | cu_int_sgn (int x) |
| int | cu_long_sgn (int x) |
| int | cu_int_cmp (int x, int y) |
| int | cu_long_cmp (long x, long y) |
| unsigned int | cu_uint_ceil_div (unsigned int x, unsigned int y) |
| unsigned long | cu_ulong_ceil_div (unsigned long x, unsigned long y) |
| uint_fast8_t | cu_uint8_dcover (uint_fast8_t x) CU_ATTR_PURE |
| uint_fast16_t | cu_uint16_dcover (uint_fast16_t x) CU_ATTR_PURE |
| uint_fast32_t | cu_uint32_dcover (uint_fast32_t x) CU_ATTR_PURE |
| uint_fast64_t | cu_uint64_dcover (uint_fast64_t x) CU_ATTR_PURE |
| unsigned int | cu_uint_dcover (unsigned int x) |
| unsigned long | cu_ulong_dcover (unsigned long x) |
| uintptr_t | cu_uintptr_dcover (uintptr_t x) |
| unsigned int | cu_uint_ucover (unsigned int x) |
| unsigned long | cu_ulong_ucover (unsigned long x) |
| unsigned int | cu_uint_lzeros (unsigned int x) |
| unsigned long | cu_ulong_lzeros (unsigned long x) |
| unsigned int | cu_uint_uzeros (unsigned int x) |
| unsigned long | cu_ulong_uzeros (unsigned long x) |
| uint_fast8_t | cu_uint8_exp2_ceil_log2 (uint_fast8_t x) |
| uint_fast16_t | cu_uint16_exp2_ceil_log2 (uint_fast16_t x) |
| uint_fast32_t | cu_uint32_exp2_ceil_log2 (uint_fast32_t x) |
| uint_fast64_t | cu_uint64_exp2_ceil_log2 (uint_fast64_t x) |
| unsigned int | cu_uint_exp2_ceil_log2 (unsigned int x) |
| unsigned long | cu_ulong_exp2_ceil_log2 (unsigned long x) |
| unsigned int | cu_uint8_bit_count (uint_fast8_t x) CU_ATTR_PURE |
| unsigned int | cu_uint16_bit_count (uint_fast16_t x) CU_ATTR_PURE |
| unsigned int | cu_uint32_bit_count (uint_fast32_t x) CU_ATTR_PURE |
| unsigned int | cu_uint64_bit_count (uint_fast64_t x) CU_ATTR_PURE |
| unsigned int | cu_uint_bit_count (unsigned int x) |
| unsigned long | cu_ulong_bit_count (unsigned long x) |
| unsigned int | cu_uint8_floor_log2 (uint_fast8_t x) CU_ATTR_PURE |
| unsigned int | cu_uint16_floor_log2 (uint_fast16_t x) CU_ATTR_PURE |
| unsigned int | cu_uint32_floor_log2 (uint_fast32_t x) CU_ATTR_PURE |
| unsigned int | cu_uint64_floor_log2 (uint_fast64_t x) CU_ATTR_PURE |
| unsigned int | cu_uint_floor_log2 (unsigned int x) |
| unsigned int | cu_ulong_floor_log2 (unsigned long x) |
| unsigned int | cu_uint8_ceil_log2 (uint_fast8_t x) CU_ATTR_PURE |
| unsigned int | cu_uint16_ceil_log2 (uint_fast16_t x) CU_ATTR_PURE |
| unsigned int | cu_uint32_ceil_log2 (uint_fast32_t x) CU_ATTR_PURE |
| unsigned int | cu_uint64_ceil_log2 (uint_fast64_t x) CU_ATTR_PURE |
| unsigned int | cu_uint_ceil_log2 (unsigned int x) |
| unsigned int | cu_ulong_ceil_log2 (unsigned long x) |
| unsigned int | cu_uint8_log2_lowbit (uint_fast8_t x) |
| unsigned int | cu_uint16_log2_lowbit (uint_fast16_t x) |
| unsigned int | cu_uint32_log2_lowbit (uint_fast32_t x) |
| unsigned int | cu_uint64_log2_lowbit (uint_fast64_t x) |
| unsigned int | cu_uint_log2_lowbit (unsigned int x) |
| unsigned int | cu_ulong_log2_lowbit (unsigned long x) |
| unsigned int | cu_uintptr_log2_lowbit (uintptr_t x) |
| uint16_t | cu_uint16_hton (uint16_t i) |
| uint32_t | cu_uint32_hton (uint32_t i) |
Function Documentation
| int cu_int_abs | ( | int | x | ) |
The absolute value af x.
| int cu_int_cmp | ( | int | x, | |
| int | y | |||
| ) |
Returns 
, which may be different from cu_long_sgn(x - y) due to overflow.
| int cu_int_max | ( | int | x, | |
| int | y | |||
| ) |
The larger or x and y.
| int cu_int_min | ( | int | x, | |
| int | y | |||
| ) |
The smaller of x and y.
| int cu_int_sgn | ( | int | x | ) |
Returns the signum function of x,
![\[ \operatorname{sgn} x = \begin{cases} -1 & \text{if $x < 0$}, \\ 0 & \text{if $x = 0$}, \\ 1 & \text{if $x > 0$}. \end{cases} \]](form_14.png)
| intptr_t cu_intptr_max | ( | intptr_t | x, | |
| intptr_t | y | |||
| ) |
The larger or x and y.
| intptr_t cu_intptr_min | ( | intptr_t | x, | |
| intptr_t | y | |||
| ) |
The smaller of x and y.
| long cu_long_abs | ( | long | x | ) |
The absolute value af x.
| int cu_long_cmp | ( | long | x, | |
| long | y | |||
| ) |
Returns , which may be different from cu_long_sgn(x - y) due to overflow.
| long cu_long_max | ( | long | x, | |
| long | y | |||
| ) |
The larger or x and y.
| long cu_long_min | ( | long | x, | |
| long | y | |||
| ) |
The smaller of x and y.
| int cu_long_sgn | ( | int | x | ) |
Returns the signum function of x, cf cu_int_sgn.
| unsigned int cu_uint16_bit_count | ( | uint_fast16_t | x | ) |
Returns the number of high bits in x.
| unsigned int cu_uint16_ceil_log2 | ( | uint_fast16_t | x | ) |
Returns ⌈log2 x⌉.
| uint_fast16_t cu_uint16_dcover | ( | uint_fast16_t | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| uint_fast16_t cu_uint16_exp2_ceil_log2 | ( | uint_fast16_t | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_uint16_floor_log2 | ( | uint_fast16_t | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_uint16_log2_lowbit | ( | uint_fast16_t | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned int cu_uint32_bit_count | ( | uint_fast32_t | x | ) |
Returns the number of high bits in x.
| unsigned int cu_uint32_ceil_log2 | ( | uint_fast32_t | x | ) |
Returns ⌈log2 x⌉.
| uint_fast32_t cu_uint32_dcover | ( | uint_fast32_t | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| uint_fast32_t cu_uint32_exp2_ceil_log2 | ( | uint_fast32_t | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_uint32_floor_log2 | ( | uint_fast32_t | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_uint32_log2_lowbit | ( | uint_fast32_t | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned int cu_uint64_bit_count | ( | uint_fast64_t | x | ) |
Returns the number of high bits in x.
| unsigned int cu_uint64_ceil_log2 | ( | uint_fast64_t | x | ) |
Returns ⌈log2 x⌉.
| uint_fast64_t cu_uint64_dcover | ( | uint_fast64_t | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| uint_fast64_t cu_uint64_exp2_ceil_log2 | ( | uint_fast64_t | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_uint64_floor_log2 | ( | uint_fast64_t | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_uint64_log2_lowbit | ( | uint_fast64_t | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned int cu_uint8_bit_count | ( | uint_fast8_t | x | ) |
Returns the number of high bits in x.
| unsigned int cu_uint8_ceil_log2 | ( | uint_fast8_t | x | ) |
Returns ⌈log2 x⌉.
| uint_fast8_t cu_uint8_dcover | ( | uint_fast8_t | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| uint_fast8_t cu_uint8_exp2_ceil_log2 | ( | uint_fast8_t | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_uint8_floor_log2 | ( | uint_fast8_t | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_uint8_log2_lowbit | ( | uint_fast8_t | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned int cu_uint_bit_count | ( | unsigned int | x | ) |
Returns the number of high bits in x.
| unsigned int cu_uint_ceil_div | ( | unsigned int | x, | |
| unsigned int | y | |||
| ) |
Returns ⌈x/y⌉.
| unsigned int cu_uint_ceil_log2 | ( | unsigned int | x | ) |
Returns ⌈log2 x⌉.
| unsigned int cu_uint_dcover | ( | unsigned int | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| unsigned int cu_uint_exp2_ceil_log2 | ( | unsigned int | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_uint_floor_log2 | ( | unsigned int | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_uint_log2_lowbit | ( | unsigned int | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned int cu_uint_lzeros | ( | unsigned int | x | ) |
A bitmask which covers the lowermost continuous zeros of x.
| unsigned int cu_uint_max | ( | unsigned int | x, | |
| unsigned int | y | |||
| ) |
The larger or x and y.
| unsigned int cu_uint_min | ( | unsigned int | x, | |
| unsigned int | y | |||
| ) |
The smaller of x and y.
| unsigned int cu_uint_ucover | ( | unsigned int | x | ) |
Returns a bitmask from the lowermost non-zero bit in x and upwards.
| unsigned int cu_uint_uzeros | ( | unsigned int | x | ) |
A bitmask which covers the uppermost continuous zeroes of x.
| uintptr_t cu_uintptr_dcover | ( | uintptr_t | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| unsigned int cu_uintptr_log2_lowbit | ( | uintptr_t | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| uintptr_t cu_uintptr_max | ( | uintptr_t | x, | |
| uintptr_t | y | |||
| ) |
The larger or x and y.
| uintptr_t cu_uintptr_min | ( | uintptr_t | x, | |
| uintptr_t | y | |||
| ) |
The smaller of x and y.
| unsigned long cu_ulong_bit_count | ( | unsigned long | x | ) |
Returns the number of high bits in x.
| unsigned long cu_ulong_ceil_div | ( | unsigned long | x, | |
| unsigned long | y | |||
| ) |
Returns ⌈x/y⌉.
| unsigned int cu_ulong_ceil_log2 | ( | unsigned long | x | ) |
Returns ⌈log2 x⌉.
| unsigned long cu_ulong_dcover | ( | unsigned long | x | ) |
Returns a bitmask from the uppermost non-zero bit in x and downwards.
| unsigned long cu_ulong_exp2_ceil_log2 | ( | unsigned long | x | ) |
Returns 2⌈log2 x⌉.
| unsigned int cu_ulong_floor_log2 | ( | unsigned long | x | ) |
Returns the exponent of the uppermost non-zero bit in x, that is ⌊log2 x⌋.
| unsigned int cu_ulong_log2_lowbit | ( | unsigned long | x | ) |
Returns the exponent of the lowermost non-zero bit in x.
| unsigned long cu_ulong_lzeros | ( | unsigned long | x | ) |
A bitmask which covers the lowermost continuous zeros of x.
| unsigned long cu_ulong_max | ( | unsigned long | x, | |
| unsigned long | y | |||
| ) |
The larger or x and y.
| unsigned long cu_ulong_min | ( | unsigned long | x, | |
| unsigned long | y | |||
| ) |
The smaller of x and y.
| unsigned long cu_ulong_ucover | ( | unsigned long | x | ) |
Returns a bitmask from the lowermost non-zero bit in x and upwards.
| unsigned long cu_ulong_uzeros | ( | unsigned long | x | ) |
A bitmask which covers the uppermost continuous zeroes of x.