diff options
Diffstat (limited to 'src/storage_number.c')
| -rw-r--r-- | src/storage_number.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/src/storage_number.c b/src/storage_number.c deleted file mode 100644 index c7bbaa8d9..000000000 --- a/src/storage_number.c +++ /dev/null @@ -1,231 +0,0 @@ -#include "common.h" - -storage_number pack_storage_number(calculated_number value, uint32_t flags) -{ - // bit 32 = sign 0:positive, 1:negative - // bit 31 = 0:divide, 1:multiply - // bit 30, 29, 28 = (multiplier or divider) 0-7 (8 total) - // bit 27, 26, 25 flags - // bit 24 to bit 1 = the value - - storage_number r = get_storage_number_flags(flags); - if(!value) return r; - - int m = 0; - calculated_number n = value; - - // if the value is negative - // add the sign bit and make it positive - if(n < 0) { - r += (1 << 31); // the sign bit 32 - n = -n; - } - - // make its integer part fit in 0x00ffffff - // by dividing it by 10 up to 7 times - // and increasing the multiplier - while(m < 7 && n > (calculated_number)0x00ffffff) { - n /= 10; - m++; - } - - if(m) { - // the value was too big and we divided it - // so we add a multiplier to unpack it - r += (1 << 30) + (m << 27); // the multiplier m - - if(n > (calculated_number)0x00ffffff) { - #ifdef NETDATA_INTERNAL_CHECKS - error("Number " CALCULATED_NUMBER_FORMAT " is too big.", value); - #endif - r += 0x00ffffff; - return r; - } - } - else { - // 0x0019999e is the number that can be multiplied - // by 10 to give 0x00ffffff - // while the value is below 0x0019999e we can - // multiply it by 10, up to 7 times, increasing - // the multiplier - while(m < 7 && n < (calculated_number)0x0019999e) { - n *= 10; - m++; - } - - // the value was small enough and we multiplied it - // so we add a divider to unpack it - r += (0 << 30) + (m << 27); // the divider m - } - -#ifdef STORAGE_WITH_MATH - // without this there are rounding problems - // example: 0.9 becomes 0.89 - r += lrint((double) n); -#else - r += (storage_number)n; -#endif - - return r; -} - -calculated_number unpack_storage_number(storage_number value) -{ - if(!value) return 0; - - int sign = 0, exp = 0; - - value ^= get_storage_number_flags(value); - - if(value & (1 << 31)) { - sign = 1; - value ^= 1 << 31; - } - - if(value & (1 << 30)) { - exp = 1; - value ^= 1 << 30; - } - - int mul = value >> 27; - value ^= mul << 27; - - calculated_number n = value; - - // fprintf(stderr, "UNPACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", value, sign, exp, mul, n); - - while(mul > 0) { - if(exp) n *= 10; - else n /= 10; - mul--; - } - - if(sign) n = -n; - return n; -} - -/* -int print_calculated_number(char *str, calculated_number value) -{ - char *wstr = str; - - int sign = (value < 0) ? 1 : 0; - if(sign) value = -value; - -#ifdef STORAGE_WITH_MATH - // without llrintl() there are rounding problems - // for example 0.9 becomes 0.89 - unsigned long long uvalue = (unsigned long long int) llrintl(value * (calculated_number)100000); -#else - unsigned long long uvalue = value * (calculated_number)100000; -#endif - - wstr = print_number_llu_r_smart(str, uvalue); - - // make sure we have 6 bytes at least - while((wstr - str) < 6) *wstr++ = '0'; - - // put the sign back - if(sign) *wstr++ = '-'; - - // reverse it - char *begin = str, *end = --wstr, aux; - while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux; - // wstr--; - // strreverse(str, wstr); - - // remove trailing zeros - int decimal = 5; - while(decimal > 0 && *wstr == '0') { - *wstr-- = '\0'; - decimal--; - } - - // terminate it, one position to the right - // to let space for a dot - wstr[2] = '\0'; - - // make space for the dot - int i; - for(i = 0; i < decimal ;i++) { - wstr[1] = wstr[0]; - wstr--; - } - - // put the dot - if(wstr[2] == '\0') { wstr[1] = '\0'; decimal--; } - else wstr[1] = '.'; - - // return the buffer length - return (int) ((wstr - str) + 2 + decimal ); -} -*/ - -int print_calculated_number(char *str, calculated_number value) { - // info("printing number " CALCULATED_NUMBER_FORMAT, value); - char integral_str[50], fractional_str[50]; - - char *wstr = str; - - if(unlikely(value < 0)) { - *wstr++ = '-'; - value = -value; - } - - calculated_number integral, fractional; - -#ifdef STORAGE_WITH_MATH - fractional = calculated_number_modf(value, &integral) * 10000000.0; -#else - fractional = ((unsigned long long)(value * 10000000ULL) % 10000000ULL); -#endif - - unsigned long long integral_int = (unsigned long long)integral; - unsigned long long fractional_int = (unsigned long long)calculated_number_llrint(fractional); - if(unlikely(fractional_int >= 10000000)) { - integral_int += 1; - fractional_int -= 10000000; - } - - // info("integral " CALCULATED_NUMBER_FORMAT " (%llu), fractional " CALCULATED_NUMBER_FORMAT " (%llu)", integral, integral_int, fractional, fractional_int); - - char *istre; - if(unlikely(integral_int == 0)) { - integral_str[0] = '0'; - istre = &integral_str[1]; - } - else - // convert the integral part to string (reversed) - istre = print_number_llu_r_smart(integral_str, integral_int); - - // copy reversed the integral string - istre--; - while( istre >= integral_str ) *wstr++ = *istre--; - - if(likely(fractional_int != 0)) { - // add a dot - *wstr++ = '.'; - - // convert the fractional part to string (reversed) - char *fstre = print_number_llu_r_smart(fractional_str, fractional_int); - - // prepend zeros to reach 7 digits length - int decimal = 7; - int len = (int)(fstre - fractional_str); - while(len < decimal) { - *wstr++ = '0'; - len++; - } - - char *begin = fractional_str; - while(begin < fstre && *begin == '0') begin++; - - // copy reversed the fractional string - fstre--; - while( fstre >= begin ) *wstr++ = *fstre--; - } - - *wstr = '\0'; - // info("printed number '%s'", str); - return (int)(wstr - str); -} |