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void int2hexsz(char *str, int num);
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void int2hexsz(char *str, int num) { int i; static void rint2hexsz(); i = 0; if (num < 0) { num = -num; *str = '-'; i++; } rint2hexsz(str, num, &i); *(str + i) = '\0'; } static void rint2hexsz(char *str, int num, int *off) { int k, n; if ((k = num >> 4) ! = 0) rint2hexsz(str, k, off); n = num & 0xf; *(str + *off) = n <= 9 ? n + '0' : n - 10 + 'A'; (*off)++; }