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core: add functions to calculate the length of an int

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This commit is contained in:
max 🍓
2025-04-11 13:57:17 +01:00
parent eb7e88d9fa
commit 17e4bb8e19
2 changed files with 126 additions and 3 deletions
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91
core/include/blue/core/misc.h
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@@ -1,10 +1,16 @@
#ifndef BLUELIB_MISB_H_
#define BLUELIB_MISB_H_
#ifndef BLUE_CORE_MISC_H_
#define BLUE_CORE_MISC_H_
#include <stddef.h>
#include <stdint.h>
#ifndef _Nonnull
#define _Nonnull
#endif
#define b_min(type, x, y) (z__b_min_##type(x, y))
#define b_max(type, x, y) (z__b_max_##type(x, y))
#define b_unbox(type, box, member) \
((type *_Nonnull)((box) ? (uintptr_t)(box) - (offsetof(type, member)) : 0))
@@ -28,4 +34,83 @@
#define BLUE_API extern
#endif
#endif // B_MISB_H_
static inline char z__b_min_char(char x, char y)
{
return x < y ? x : y;
}
static inline unsigned char z__b_min_uchar(unsigned char x, unsigned char y)
{
return x < y ? x : y;
}
static inline int z__b_min_int(int x, int y)
{
return x < y ? x : y;
}
static inline unsigned int z__b_min_uint(unsigned int x, unsigned int y)
{
return x < y ? x : y;
}
static inline long z__b_min_long(long x, long y)
{
return x < y ? x : y;
}
static inline unsigned int z__b_min_ulong(unsigned long x, unsigned long y)
{
return x < y ? x : y;
}
static inline long long z__b_min_longlong(long long x, long long y)
{
return x < y ? x : y;
}
static inline unsigned long long z__b_min_ulonglong(
unsigned long long x, unsigned long long y)
{
return x < y ? x : y;
}
static inline size_t z__b_min_size_t(size_t x, size_t y)
{
return x < y ? x : y;
}
static inline char z__b_max_char(char x, char y)
{
return x > y ? x : y;
}
static inline unsigned char z__b_max_uchar(unsigned char x, unsigned char y)
{
return x > y ? x : y;
}
static inline int z__b_max_int(int x, int y)
{
return x > y ? x : y;
}
static inline unsigned int z__b_max_uint(unsigned int x, unsigned int y)
{
return x > y ? x : y;
}
static inline long z__b_max_long(long x, long y)
{
return x > y ? x : y;
}
static inline unsigned int z__b_max_ulong(unsigned long x, unsigned long y)
{
return x > y ? x : y;
}
static inline long long z__b_max_longlong(long long x, long long y)
{
return x > y ? x : y;
}
static inline unsigned long long z__b_max_ulonglong(
unsigned long long x, unsigned long long y)
{
return x > y ? x : y;
}
static inline size_t z__b_max_size_t(size_t x, size_t y)
{
return x > y ? x : y;
}
BLUE_API size_t b_int_length(intptr_t v);
BLUE_API size_t b_uint_length(uintptr_t v);
#endif // BLUE_CORE_MISC_H_

38
core/misc.c Normal file
View File

@@ -0,0 +1,38 @@
#include <blue/core/misc.h>
#define LENGTH_RET(v, boundary, len) \
if ((v) < (boundary)) \
return (len);
size_t b_int_length(intptr_t v)
{
size_t len = 0;
if (v < 0) {
v *= -1;
len++;
}
return len + b_uint_length(v);
}
size_t b_uint_length(uintptr_t v)
{
LENGTH_RET(v, 10, 1);
LENGTH_RET(v, 100, 2);
LENGTH_RET(v, 1000, 3);
LENGTH_RET(v, 10000, 4);
LENGTH_RET(v, 100000, 5);
LENGTH_RET(v, 1000000, 6);
LENGTH_RET(v, 10000000, 7);
LENGTH_RET(v, 100000000, 8);
LENGTH_RET(v, 1000000000, 9);
LENGTH_RET(v, 10000000000, 10);
size_t len = 0;
while (v > 0) {
v /= 10;
len++;
}
return len;
}