3 extern char *print_number_lu_r(char *str, unsigned long uvalue);
4 extern char *print_number_llu_r(char *str, unsigned long long uvalue);
6 storage_number pack_storage_number(calculated_number value, uint32_t flags)
8 // bit 32 = sign 0:positive, 1:negative
9 // bit 31 = 0:divide, 1:multiply
10 // bit 30, 29, 28 = (multiplier or divider) 0-6 (7 total)
11 // bit 27, 26, 25 flags
12 // bit 24 to bit 1 = the value
14 storage_number r = get_storage_number_flags(flags);
18 calculated_number n = value;
20 // if the value is negative
21 // add the sign bit and make it positive
23 r += (1 << 31); // the sign bit 32
27 // make its integer part fit in 0x00ffffff
28 // by dividing it by 10 up to 7 times
29 // and increasing the multiplier
30 while(m < 7 && n > (calculated_number)0x00ffffff) {
36 // the value was too big and we divided it
37 // so we add a multiplier to unpack it
38 r += (1 << 30) + (m << 27); // the multiplier m
40 if(n > (calculated_number)0x00ffffff) {
41 error("Number " CALCULATED_NUMBER_FORMAT " is too big.", value);
47 // 0x0019999e is the number that can be multiplied
48 // by 10 to give 0x00ffffff
49 // while the value is below 0x0019999e we can
50 // multiply it by 10, up to 7 times, increasing
52 while(m < 7 && n < (calculated_number)0x0019999e) {
57 // the value was small enough and we multiplied it
58 // so we add a divider to unpack it
59 r += (0 << 30) + (m << 27); // the divider m
62 #ifdef STORAGE_WITH_MATH
63 // without this there are rounding problems
64 // example: 0.9 becomes 0.89
65 r += lrint((double) n);
67 r += (storage_number)n;
73 calculated_number unpack_storage_number(storage_number value)
77 int sign = 0, exp = 0;
79 value ^= get_storage_number_flags(value);
81 if(value & (1 << 31)) {
86 if(value & (1 << 30)) {
91 int mul = value >> 27;
94 calculated_number n = value;
96 // fprintf(stderr, "UNPACK: %08X, sign = %d, exp = %d, mul = %d, n = " CALCULATED_NUMBER_FORMAT "\n", value, sign, exp, mul, n);
108 int print_calculated_number(char *str, calculated_number value)
112 int sign = (value < 0) ? 1 : 0;
113 if(sign) value = -value;
115 #ifdef STORAGE_WITH_MATH
116 // without llrint() there are rounding problems
117 // for example 0.9 becomes 0.89
118 unsigned long long uvalue = (unsigned long long int) llrint(value * (calculated_number)100000);
120 unsigned long long uvalue = value * (calculated_number)100000;
124 if(uvalue > (unsigned long long)0xffffffff)
125 wstr = print_number_llu_r(str, uvalue);
127 wstr = print_number_lu_r(str, uvalue);
129 do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10);
132 // make sure we have 6 bytes at least
133 while((wstr - str) < 6) *wstr++ = '0';
136 if(sign) *wstr++ = '-';
139 char *begin = str, *end = --wstr, aux;
140 while (end > begin) aux = *end, *end-- = *begin, *begin++ = aux;
142 // strreverse(str, wstr);
144 // remove trailing zeros
146 while(decimal > 0 && *wstr == '0') {
151 // terminate it, one position to the right
152 // to let space for a dot
155 // make space for the dot
157 for(i = 0; i < decimal ;i++) {
163 if(wstr[2] == '\0') { wstr[1] = '\0'; decimal--; }
166 // return the buffer length
167 return (int) ((wstr - str) + 2 + decimal );