| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| #pragma once |
| |
| #include <errno.h> |
| #include <inttypes.h> |
| |
| #include "macro.h" |
| |
| int parse_percent_unbounded(const char *p); |
| int parse_percent(const char *p); |
| |
| int parse_permille_unbounded(const char *p); |
| int parse_permille(const char *p); |
| |
| int parse_permyriad_unbounded(const char *p); |
| int parse_permyriad(const char *p); |
| |
| /* Some macro-like helpers that convert a percent/permille/permyriad value (as parsed by parse_percent()) to |
| * a value relative to 100% == 2^32-1. Rounds to closest. */ |
| static inline uint32_t UINT32_SCALE_FROM_PERCENT(int percent) { |
| assert_cc(INT_MAX <= UINT32_MAX); |
| |
| return (uint32_t) (((uint64_t) CLAMP(percent, 0, 100) * UINT32_MAX + 50) / 100U); |
| } |
| |
| static inline uint32_t UINT32_SCALE_FROM_PERMILLE(int permille) { |
| return (uint32_t) (((uint64_t) CLAMP(permille, 0, 1000) * UINT32_MAX + 500) / 1000U); |
| } |
| |
| static inline uint32_t UINT32_SCALE_FROM_PERMYRIAD(int permyriad) { |
| return (uint32_t) (((uint64_t) CLAMP(permyriad, 0, 10000) * UINT32_MAX + 5000) / 10000U); |
| } |
| |
| static inline int UINT32_SCALE_TO_PERCENT(uint32_t scale) { |
| uint32_t u; |
| |
| u = (uint32_t) ((((uint64_t) scale) * 100U + UINT32_MAX/2) / UINT32_MAX); |
| if (u > INT_MAX) |
| return -ERANGE; |
| |
| return (int) u; |
| } |
| |
| static inline int UINT32_SCALE_TO_PERMILLE(uint32_t scale) { |
| uint32_t u; |
| |
| u = (uint32_t) ((((uint64_t) scale) * 1000U + UINT32_MAX/2) / UINT32_MAX); |
| if (u > INT_MAX) |
| return -ERANGE; |
| |
| return (int) u; |
| } |
| |
| static inline int UINT32_SCALE_TO_PERMYRIAD(uint32_t scale) { |
| uint32_t u; |
| |
| u = (uint32_t) ((((uint64_t) scale) * 10000U + UINT32_MAX/2) / UINT32_MAX); |
| if (u > INT_MAX) |
| return -ERANGE; |
| |
| return (int) u; |
| } |
| |
| #define PERMYRIAD_AS_PERCENT_FORMAT_STR "%i.%02i%%" |
| #define PERMYRIAD_AS_PERCENT_FORMAT_VAL(x) ((x)/100), ((x)%100) |