itoa linux版

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char* Lx_itoaEx(int value, char* str, int radix) {     static char dig[] =         "0123456789"         "abcdefghijklmnopqrstuvwxyz";     int n = 0, neg = 0;     unsigned int v;     char* p, *q;     char c;     if (radix == 10 && value < 0) {         value = -value;         neg = 1;     }     v = value;     do {         str[n++] = dig[v%radix];         v /= radix;     } while (v);     if (neg)         str[n++] = '-';     str[n] = '\0';     for (p = str, q = p + (n-1); p < q; ++p, --q)         c = *p, *p = *q, *q = c;     return str; }