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/fatfs-latest/
Dff.c6845 int exp = 0, mag = 0; local
6872 exp = ilog10(val);
6873 if (exp > 99 || prec + 7 >= SZ_NUM_BUF) { /* Buffer overflow or E > +99? */
6876 if (exp < -99) exp = -99;
6877 val /= i10x(exp); /* Normalize */
6892 if (exp < 0) {
6893 exp = 0 - exp; *buf++ = '-';
6897 *buf++ = (char)('0' + exp / 10);
6898 *buf++ = (char)('0' + exp % 10);