7711969e57
flash: -44 RAM: 0 Largest expected number is 999 after the multiplication by 100. I measured the execution time drops from ~170us to ~73us.
293 lines
6.2 KiB
C++
293 lines
6.2 KiB
C++
//conv2str.cpp - Float conversion utilities
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#include "conv2str.h"
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#include <stdlib.h>
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// convert float to string with +123.4 format
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char conv[8];
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char *ftostr3(const float &x)
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{
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return itostr3((int)x);
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}
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char *itostr2(const uint8_t &x)
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{
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//sprintf(conv,"%5.1f",x);
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int xx = x;
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conv[0] = (xx / 10) % 10 + '0';
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conv[1] = (xx) % 10 + '0';
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conv[2] = 0;
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return conv;
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}
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// Convert float to string with 123.4 format, dropping sign
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char *ftostr31(const float &x)
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{
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int xx = x * 10;
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conv[0] = (xx >= 0) ? '+' : '-';
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xx = abs(xx);
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conv[1] = (xx / 1000) % 10 + '0';
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conv[2] = (xx / 100) % 10 + '0';
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conv[3] = (xx / 10) % 10 + '0';
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conv[4] = '.';
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conv[5] = (xx) % 10 + '0';
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conv[6] = 0;
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return conv;
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}
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// Convert float to string with 123.4 format
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char *ftostr31ns(const float &x)
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{
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int xx = x * 10;
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//conv[0]=(xx>=0)?'+':'-';
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xx = abs(xx);
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conv[0] = (xx / 1000) % 10 + '0';
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conv[1] = (xx / 100) % 10 + '0';
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conv[2] = (xx / 10) % 10 + '0';
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conv[3] = '.';
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conv[4] = (xx) % 10 + '0';
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conv[5] = 0;
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return conv;
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}
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char *ftostr32(const float &x)
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{
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long xx = x * 100;
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if (xx >= 0)
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conv[0] = (xx / 10000) % 10 + '0';
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else
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conv[0] = '-';
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xx = abs(xx);
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conv[1] = (xx / 1000) % 10 + '0';
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conv[2] = (xx / 100) % 10 + '0';
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conv[3] = '.';
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conv[4] = (xx / 10) % 10 + '0';
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conv[5] = (xx) % 10 + '0';
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conv[6] = 0;
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return conv;
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}
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//// Convert float to rj string with 123.45 format
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char *ftostr32ns(const float &x) {
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long xx = abs(x);
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conv[0] = xx >= 10000 ? (xx / 10000) % 10 + '0' : ' ';
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conv[1] = xx >= 1000 ? (xx / 1000) % 10 + '0' : ' ';
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conv[2] = xx >= 100 ? (xx / 100) % 10 + '0' : '0';
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conv[3] = '.';
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conv[4] = (xx / 10) % 10 + '0';
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conv[5] = xx % 10 + '0';
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return conv;
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}
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// Convert float to string with 1.234 format
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char *ftostr43(const float &x, uint8_t offset)
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{
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const size_t maxOffset = sizeof(conv)/sizeof(conv[0]) - 6;
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if (offset>maxOffset) offset = maxOffset;
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long xx = x * 1000;
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if (xx >= 0)
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conv[offset] = (xx / 1000) % 10 + '0';
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else
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conv[offset] = '-';
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xx = abs(xx);
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conv[offset + 1] = '.';
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conv[offset + 2] = (xx / 100) % 10 + '0';
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conv[offset + 3] = (xx / 10) % 10 + '0';
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conv[offset + 4] = (xx) % 10 + '0';
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conv[offset + 5] = 0;
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return conv;
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}
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//Float to string with 1.23 format
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char *ftostr12ns(const float &x)
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{
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int xx = x * 100;
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xx = abs(xx);
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conv[0] = (xx / 100) % 10 + '0';
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conv[1] = '.';
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conv[2] = (xx / 10) % 10 + '0';
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conv[3] = (xx) % 10 + '0';
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conv[4] = 0;
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return conv;
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}
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//Float to string with 1.234 format
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char *ftostr13ns(const float &x)
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{
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long xx = x * 1000;
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if (xx >= 0)
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conv[0] = ' ';
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else
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conv[0] = '-';
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xx = abs(xx);
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conv[1] = (xx / 1000) % 10 + '0';
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conv[2] = '.';
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conv[3] = (xx / 100) % 10 + '0';
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conv[4] = (xx / 10) % 10 + '0';
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conv[5] = (xx) % 10 + '0';
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conv[6] = 0;
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return conv;
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}
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// convert float to space-padded string with -_23.4_ format
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char *ftostr32sp(const float &x) {
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long xx = abs(x * 100);
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uint8_t dig;
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if (x < 0) { // negative val = -_0
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conv[0] = '-';
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dig = (xx / 1000) % 10;
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conv[1] = dig ? '0' + dig : ' ';
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}
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else { // positive val = __0
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dig = (xx / 10000) % 10;
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if (dig) {
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conv[0] = '0' + dig;
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conv[1] = '0' + (xx / 1000) % 10;
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}
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else {
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conv[0] = ' ';
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dig = (xx / 1000) % 10;
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conv[1] = dig ? '0' + dig : ' ';
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}
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}
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conv[2] = '0' + (xx / 100) % 10; // lsd always
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dig = xx % 10;
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if (dig) { // 2 decimal places
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conv[5] = '0' + dig;
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conv[4] = '0' + (xx / 10) % 10;
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conv[3] = '.';
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}
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else { // 1 or 0 decimal place
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dig = (xx / 10) % 10;
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if (dig) {
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conv[4] = '0' + dig;
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conv[3] = '.';
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}
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else {
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conv[3] = conv[4] = ' ';
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}
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conv[5] = ' ';
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}
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conv[6] = '\0';
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return conv;
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}
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char *itostr31(const int &xx)
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{
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conv[0] = (xx >= 0) ? '+' : '-';
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conv[1] = (xx / 1000) % 10 + '0';
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conv[2] = (xx / 100) % 10 + '0';
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conv[3] = (xx / 10) % 10 + '0';
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conv[4] = '.';
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conv[5] = (xx) % 10 + '0';
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conv[6] = 0;
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return conv;
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}
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// Convert int to rj string with 123 or -12 format
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char *itostr3(const int &x)
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{
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int xx = x;
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if (xx < 0) {
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conv[0] = '-';
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xx = -xx;
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} else if (xx >= 100)
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conv[0] = (xx / 100) % 10 + '0';
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else
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conv[0] = ' ';
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if (xx >= 10)
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conv[1] = (xx / 10) % 10 + '0';
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else
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conv[1] = ' ';
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conv[2] = (xx) % 10 + '0';
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conv[3] = 0;
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return conv;
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}
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// Convert int to lj string with 123 format
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char *itostr3left(const int &xx)
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{
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if (xx >= 100)
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{
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conv[0] = (xx / 100) % 10 + '0';
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conv[1] = (xx / 10) % 10 + '0';
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conv[2] = (xx) % 10 + '0';
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conv[3] = 0;
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}
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else if (xx >= 10)
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{
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conv[0] = (xx / 10) % 10 + '0';
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conv[1] = (xx) % 10 + '0';
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conv[2] = 0;
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}
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else
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{
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conv[0] = (xx) % 10 + '0';
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conv[1] = 0;
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}
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return conv;
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}
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// Convert int to rj string with 1234 format
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char *itostr4(const int &xx) {
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conv[0] = xx >= 1000 ? (xx / 1000) % 10 + '0' : ' ';
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conv[1] = xx >= 100 ? (xx / 100) % 10 + '0' : ' ';
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conv[2] = xx >= 10 ? (xx / 10) % 10 + '0' : ' ';
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conv[3] = xx % 10 + '0';
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conv[4] = 0;
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return conv;
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}
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// Convert float to rj string with 12345 format
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char *ftostr5(const float &x) {
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long xx = abs(x);
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conv[0] = xx >= 10000 ? (xx / 10000) % 10 + '0' : ' ';
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conv[1] = xx >= 1000 ? (xx / 1000) % 10 + '0' : ' ';
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conv[2] = xx >= 100 ? (xx / 100) % 10 + '0' : ' ';
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conv[3] = xx >= 10 ? (xx / 10) % 10 + '0' : ' ';
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conv[4] = xx % 10 + '0';
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conv[5] = 0;
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return conv;
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}
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// Convert float to string with +1234.5 format
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char *ftostr51(const float &x)
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{
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long xx = x * 10;
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conv[0] = (xx >= 0) ? '+' : '-';
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xx = abs(xx);
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conv[1] = (xx / 10000) % 10 + '0';
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conv[2] = (xx / 1000) % 10 + '0';
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conv[3] = (xx / 100) % 10 + '0';
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conv[4] = (xx / 10) % 10 + '0';
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conv[5] = '.';
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conv[6] = (xx) % 10 + '0';
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conv[7] = 0;
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return conv;
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}
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// Convert float to string with +123.45 format
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char *ftostr52(const float &x)
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{
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long xx = x * 100;
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conv[0] = (xx >= 0) ? '+' : '-';
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xx = abs(xx);
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conv[1] = (xx / 10000) % 10 + '0';
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conv[2] = (xx / 1000) % 10 + '0';
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conv[3] = (xx / 100) % 10 + '0';
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conv[4] = '.';
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conv[5] = (xx / 10) % 10 + '0';
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conv[6] = (xx) % 10 + '0';
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conv[7] = 0;
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return conv;
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}
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