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37 lines
843 B
C
37 lines
843 B
C
#include "fmt.h"
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#include "byte.h"
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#include <time.h>
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static unsigned int fmt_2digits(char* dest,int i) {
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dest[0]=(char)((i/10)+'0');
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dest[1]=(char)((i%10)+'0');
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return 2;
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}
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size_t fmt_iso8601(char* dest,time_t t) {
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#ifdef _WIN32
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struct tm tmp;
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struct tm* x=&tmp;
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gmtime_s(&tmp,&t); /* can't recover from when this fails */
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#else
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struct tm* x=gmtime(&t);
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#endif
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size_t i;
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if (dest==0) return sizeof("2014-05-27T19:22:16Z")-1;
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/* "2014-05-27T19:22:16Z" */
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i=fmt_ulong(dest,(x->tm_year+1900));
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dest[i++]='-';
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i+=fmt_2digits(dest+i,x->tm_mon+1);
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dest[i++]='-';
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i+=fmt_2digits(dest+i,x->tm_mday);
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dest[i++]='T';
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i+=fmt_2digits(dest+i,x->tm_hour);
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i+=fmt_str(dest+i,":");
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i+=fmt_2digits(dest+i,x->tm_min);
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i+=fmt_str(dest+i,":");
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i+=fmt_2digits(dest+i,x->tm_sec);
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i+=fmt_str(dest+i,"Z");
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return i;
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}
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