1 #ifdef STORAGE_WITH_MATH
6 #include "storage_number.h"
9 #if __x86_64__ || __ppc64__
16 storage_number pack_storage_number(calculated_number value, uint32_t flags)
18 // bit 32 = sign 0:positive, 1:negative
19 // bit 31 = 0:divide, 1:multiply
20 // bit 30, 29, 28 = (multiplier or divider) 0-6 (7 total)
21 // bit 27, 26, 25 flags
22 // bit 24 to bit 1 = the value
24 storage_number r = get_storage_number_flags(flags);
28 calculated_number n = value;
30 // if the value is negative
31 // add the sign bit and make it positive
33 r += (1 << 31); // the sign bit 32
37 // make its integer part fit in 0x00ffffff
38 // by dividing it by 10 up to 7 times
39 // and increasing the multiplier
40 while(m < 7 && n > (calculated_number)0x00ffffff) {
46 // the value was too big and we divided it
47 // so we add a multiplier to unpack it
48 r += (1 << 30) + (m << 27); // the multiplier m
50 if(n > (calculated_number)0x00ffffff) {
51 error("Number " CALCULATED_NUMBER_FORMAT " is too big.", value);
57 // 0x0019999e is the number that can be multiplied
58 // by 10 to give 0x00ffffff
59 // while the value is below 0x0019999e we can
60 // multiply it by 10, up to 7 times, increasing
62 while(m < 7 && n < (calculated_number)0x0019999e) {
67 // the value was small enough and we multiplied it
68 // so we add a divider to unpack it
69 r += (0 << 30) + (m << 27); // the divider m
72 #ifdef STORAGE_WITH_MATH
73 // without this there are rounding problems
74 // example: 0.9 becomes 0.89
77 r += (storage_number)n;
83 calculated_number unpack_storage_number(storage_number value)
87 int sign = 0, exp = 0;
89 value ^= get_storage_number_flags(value);
91 if(value & (1 << 31)) {
96 if(value & (1 << 30)) {
101 int mul = value >> 27;
104 calculated_number n = value;
106 // fprintf(stderr, "UNPACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", value, sign, exp, mul, n);
119 // This trick seems to give an 80% speed increase in 32bit systems
120 // print_calculated_number_llu_r() will just print the digits up to the
121 // point the remaining value fits in 32 bits, and then calls
122 // print_calculated_number_lu_r() to print the rest with 32 bit arithmetic.
124 static char *print_calculated_number_lu_r(char *str, unsigned long uvalue) {
128 do *wstr++ = (char)(48 + (uvalue % 10)); while(uvalue /= 10);
132 static char *print_calculated_number_llu_r(char *str, unsigned long long uvalue) {
136 do *wstr++ = (char)(48 + (uvalue % 10)); while((uvalue /= 10) && uvalue > (unsigned long long)0xffffffff);
137 if(uvalue) return print_calculated_number_lu_r(wstr, uvalue);
142 int print_calculated_number(char *str, calculated_number value)
146 int sign = (value < 0) ? 1 : 0;
147 if(sign) value = -value;
149 #ifdef STORAGE_WITH_MATH
150 // without llrint() there are rounding problems
151 // for example 0.9 becomes 0.89
152 unsigned long long uvalue = llrint(value * (calculated_number)100000);
154 unsigned long long uvalue = value * (calculated_number)100000;
158 if(uvalue > (unsigned long long)0xffffffff)
159 wstr = print_calculated_number_llu_r(str, uvalue);
161 wstr = print_calculated_number_lu_r(str, uvalue);
163 do *wstr++ = (char)(48 + (uvalue % 10)); while(uvalue /= 10);
166 // make sure we have 6 bytes at least
167 while((wstr - str) < 6) *wstr++ = '0';
170 if(sign) *wstr++ = '-';
173 char *begin = str, *end = --wstr, aux;
174 while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux;
176 // strreverse(str, wstr);
178 // remove trailing zeros
180 while(decimal > 0 && *wstr == '0') {
185 // terminate it, one position to the right
186 // to let space for a dot
189 // make space for the dot
191 for(i = 0; i < decimal ;i++) {
197 if(wstr[2] == '\0') { wstr[1] = '\0'; decimal--; }
200 // return the buffer length
201 return ( (wstr - str) + 2 + decimal );