4 #ifdef STORAGE_WITH_MATH
10 #include "storage_number.h"
13 #if __x86_64__ || __ppc64__
20 storage_number pack_storage_number(calculated_number value, uint32_t flags)
22 // bit 32 = sign 0:positive, 1:negative
23 // bit 31 = 0:divide, 1:multiply
24 // bit 30, 29, 28 = (multiplier or divider) 0-6 (7 total)
25 // bit 27, 26, 25 flags
26 // bit 24 to bit 1 = the value
28 storage_number r = get_storage_number_flags(flags);
32 calculated_number n = value;
34 // if the value is negative
35 // add the sign bit and make it positive
37 r += (1 << 31); // the sign bit 32
41 // make its integer part fit in 0x00ffffff
42 // by dividing it by 10 up to 7 times
43 // and increasing the multiplier
44 while(m < 7 && n > (calculated_number)0x00ffffff) {
50 // the value was too big and we divided it
51 // so we add a multiplier to unpack it
52 r += (1 << 30) + (m << 27); // the multiplier m
54 if(n > (calculated_number)0x00ffffff) {
55 error("Number " CALCULATED_NUMBER_FORMAT " is too big.", value);
61 // 0x0019999e is the number that can be multiplied
62 // by 10 to give 0x00ffffff
63 // while the value is below 0x0019999e we can
64 // multiply it by 10, up to 7 times, increasing
66 while(m < 7 && n < (calculated_number)0x0019999e) {
71 // the value was small enough and we multiplied it
72 // so we add a divider to unpack it
73 r += (0 << 30) + (m << 27); // the divider m
76 #ifdef STORAGE_WITH_MATH
77 // without this there are rounding problems
78 // example: 0.9 becomes 0.89
81 r += (storage_number)n;
87 calculated_number unpack_storage_number(storage_number value)
91 int sign = 0, exp = 0;
93 value ^= get_storage_number_flags(value);
95 if(value & (1 << 31)) {
100 if(value & (1 << 30)) {
105 int mul = value >> 27;
108 calculated_number n = value;
110 // fprintf(stderr, "UNPACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", value, sign, exp, mul, n);
123 // This trick seems to give an 80% speed increase in 32bit systems
124 // print_calculated_number_llu_r() will just print the digits up to the
125 // point the remaining value fits in 32 bits, and then calls
126 // print_calculated_number_lu_r() to print the rest with 32 bit arithmetic.
128 static char *print_calculated_number_lu_r(char *str, unsigned long uvalue) {
132 do *wstr++ = (char)(48 + (uvalue % 10)); while(uvalue /= 10);
136 static char *print_calculated_number_llu_r(char *str, unsigned long long uvalue) {
140 do *wstr++ = (char)(48 + (uvalue % 10)); while((uvalue /= 10) && uvalue > (unsigned long long)0xffffffff);
141 if(uvalue) return print_calculated_number_lu_r(wstr, uvalue);
146 int print_calculated_number(char *str, calculated_number value)
150 int sign = (value < 0) ? 1 : 0;
151 if(sign) value = -value;
153 #ifdef STORAGE_WITH_MATH
154 // without llrint() there are rounding problems
155 // for example 0.9 becomes 0.89
156 unsigned long long uvalue = llrint(value * (calculated_number)100000);
158 unsigned long long uvalue = value * (calculated_number)100000;
162 if(uvalue > (unsigned long long)0xffffffff)
163 wstr = print_calculated_number_llu_r(str, uvalue);
165 wstr = print_calculated_number_lu_r(str, uvalue);
167 do *wstr++ = (char)(48 + (uvalue % 10)); while(uvalue /= 10);
170 // make sure we have 6 bytes at least
171 while((wstr - str) < 6) *wstr++ = '0';
174 if(sign) *wstr++ = '-';
177 char *begin = str, *end = --wstr, aux;
178 while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux;
180 // strreverse(str, wstr);
182 // remove trailing zeros
184 while(decimal > 0 && *wstr == '0') {
189 // terminate it, one position to the right
190 // to let space for a dot
193 // make space for the dot
195 for(i = 0; i < decimal ;i++) {
201 if(wstr[2] == '\0') { wstr[1] = '\0'; decimal--; }
204 // return the buffer length
205 return ( (wstr - str) + 2 + decimal );