44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#include "samd51j18a.h"
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#include "string.h"
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#include "usb_util.h"
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char digit(int d, int radix) {
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if (d < 10) {
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return d + '0';
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} else {
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return d - 10 + 'A';
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}
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}
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int UTIL_ltoa_radix(int64_t value, char *dest, int radix) {
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int64_t original = value; // save original value
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char buf[25] = "";
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int c = sizeof(buf) - 1;
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int last = c;
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int d;
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int size;
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if (value < 0) // if it's negative, take the absolute value
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value = -value;
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do // write least significant digit of value that's left
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{
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d = (value % radix);
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buf[--c] = digit(d, radix);
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value /= radix;
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} while (value);
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if (original < 0) buf[--c] = '-';
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size = last - c + 1; // includes null at end
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memcpy(dest, &buf[c], last - c + 1);
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return (size - 1); // without null termination
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}
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int UTIL_ltoa(int64_t value, char *dest) { return UTIL_ltoa_radix(value, dest, 10); }
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int UTIL_itoa(int value, char *dest) { return UTIL_ltoa_radix((int64_t)value, dest, 10); }
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int UTIL_utoa(uint32_t value, char *dest) { return UTIL_ltoa_radix((int64_t)value, dest, 10); }
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