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Diffstat (limited to 'libnetdata/storage_number/storage_number.h')
-rw-r--r-- | libnetdata/storage_number/storage_number.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/libnetdata/storage_number/storage_number.h b/libnetdata/storage_number/storage_number.h new file mode 100644 index 0000000..28b7f26 --- /dev/null +++ b/libnetdata/storage_number/storage_number.h @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_STORAGE_NUMBER_H +#define NETDATA_STORAGE_NUMBER_H 1 + +#include "../libnetdata.h" + +#ifdef NETDATA_WITHOUT_LONG_DOUBLE + +#define powl pow +#define modfl modf +#define llrintl llrint +#define roundl round +#define sqrtl sqrt +#define copysignl copysign +#define strtold strtod + +typedef double calculated_number; +#define CALCULATED_NUMBER_FORMAT "%0.7f" +#define CALCULATED_NUMBER_FORMAT_ZERO "%0.0f" +#define CALCULATED_NUMBER_FORMAT_AUTO "%f" + +#define LONG_DOUBLE_MODIFIER "f" +typedef double LONG_DOUBLE; + +#else // NETDATA_WITHOUT_LONG_DOUBLE + +typedef long double calculated_number; +#define CALCULATED_NUMBER_FORMAT "%0.7Lf" +#define CALCULATED_NUMBER_FORMAT_ZERO "%0.0Lf" +#define CALCULATED_NUMBER_FORMAT_AUTO "%Lf" + +#define LONG_DOUBLE_MODIFIER "Lf" +typedef long double LONG_DOUBLE; + +#endif // NETDATA_WITHOUT_LONG_DOUBLE + +//typedef long long calculated_number; +//#define CALCULATED_NUMBER_FORMAT "%lld" + +typedef long long collected_number; +#define COLLECTED_NUMBER_FORMAT "%lld" + +/* +typedef long double collected_number; +#define COLLECTED_NUMBER_FORMAT "%0.7Lf" +*/ + +#define calculated_number_modf(x, y) modfl(x, y) +#define calculated_number_llrint(x) llrintl(x) +#define calculated_number_round(x) roundl(x) +#define calculated_number_fabs(x) fabsl(x) +#define calculated_number_pow(x, y) powl(x, y) +#define calculated_number_epsilon (calculated_number)0.0000001 + +#define calculated_number_equal(a, b) (calculated_number_fabs((a) - (b)) < calculated_number_epsilon) + +#define calculated_number_isnumber(a) (!(fpclassify(a) & (FP_NAN|FP_INFINITE))) + +typedef uint32_t storage_number; +#define STORAGE_NUMBER_FORMAT "%u" + +#define SN_EXISTS (1 << 24) // the value exists +#define SN_EXISTS_RESET (1 << 25) // the value has been overflown +#define SN_EXISTS_100 (1 << 26) // very large value (multipler is 100 instead of 10) + +// extract the flags +#define get_storage_number_flags(value) ((((storage_number)(value)) & (1 << 24)) | (((storage_number)(value)) & (1 << 25)) | (((storage_number)(value)) & (1 << 26))) +#define SN_EMPTY_SLOT 0x00000000 + +// checks +#define does_storage_number_exist(value) ((get_storage_number_flags(value) != 0)?1:0) +#define did_storage_number_reset(value) ((get_storage_number_flags(value) == SN_EXISTS_RESET)?1:0) + +storage_number pack_storage_number(calculated_number value, uint32_t flags); +calculated_number unpack_storage_number(storage_number value); + +int print_calculated_number(char *str, calculated_number value); + +// sign div/mul <--- multiplier / divider ---> 10/100 RESET EXISTS VALUE +#define STORAGE_NUMBER_POSITIVE_MAX_RAW (storage_number)( (0 << 31) | (1 << 30) | (1 << 29) | (1 << 28) | (1<<27) | (1 << 26) | (0 << 25) | (1 << 24) | 0x00ffffff ) +#define STORAGE_NUMBER_POSITIVE_MIN_RAW (storage_number)( (0 << 31) | (0 << 30) | (1 << 29) | (1 << 28) | (1<<27) | (0 << 26) | (0 << 25) | (1 << 24) | 0x00000001 ) +#define STORAGE_NUMBER_NEGATIVE_MAX_RAW (storage_number)( (1 << 31) | (0 << 30) | (1 << 29) | (1 << 28) | (1<<27) | (0 << 26) | (0 << 25) | (1 << 24) | 0x00000001 ) +#define STORAGE_NUMBER_NEGATIVE_MIN_RAW (storage_number)( (1 << 31) | (1 << 30) | (1 << 29) | (1 << 28) | (1<<27) | (1 << 26) | (0 << 25) | (1 << 24) | 0x00ffffff ) + +// accepted accuracy loss +#define ACCURACY_LOSS_ACCEPTED_PERCENT 0.0001 +#define accuracy_loss(t1, t2) (((t1) == (t2) || (t1) == 0.0 || (t2) == 0.0) ? 0.0 : (100.0 - (((t1) > (t2)) ? ((t2) * 100.0 / (t1) ) : ((t1) * 100.0 / (t2))))) + +// Maximum acceptable rate of increase for counters. With a rate of 10% netdata can safely detect overflows with a +// period of at least every other 10 samples. +#define MAX_INCREMENTAL_PERCENT_RATE 10 + +#endif /* NETDATA_STORAGE_NUMBER_H */ |