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18 lines
400 B
C
18 lines
400 B
C
#include "fmt.h"
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static inline char tohex(char c) {
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return (char)(c>=10?c-10+'a':c+'0');
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}
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size_t fmt_xlonglong(char *dest,unsigned long long i) {
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unsigned long long len,tmp;
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/* first count the number of bytes needed */
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for (len=1, tmp=i; tmp>15; ++len) tmp>>=4;
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if (dest)
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for (tmp=i, dest+=len; ; ) {
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*--dest = tohex(tmp&15);
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if (!(tmp>>=4)) break;
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}
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return len;
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}
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