language: C++ 4.7.2 (gcc-4.7.2)
date: 898 days 17 hours ago
link:
visibility: private 
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struct itostr_helper {
    static unsigned out[10000];
 
    itostr_helper() {
        for (int i = 0; i < 10000; i++) {
            unsigned v = i;
            char * o = (char*)(out + i);
            o[3] = v % 10 + '0';
            o[2] = (v % 100) / 10 + '0';
            o[1] = (v % 1000) / 100 + '0';
            o[0] = (v % 10000) / 1000;
            if (o[0]) o[0] |= 0x30;
            else if (o[1] != '0') o[0] |= 0x20;
            else if (o[2] != '0') o[0] |= 0x10;
            else o[0] |= 0x00;
        }
    }
};
unsigned itostr_helper::out[10000];
 
itostr_helper hlp_init;
 
template <typename T>
std::string itostr(T o) {
    typedef itostr_helper hlp;
 
    unsigned blocks[3], *b = blocks + 2;
    blocks[0] = o < 0 ? ~o + 1 : o;
    blocks[2] = blocks[0] % 10000; blocks[0] /= 10000;
    blocks[2] = hlp::out[blocks[2]];
 
    if (blocks[0]) {
        blocks[1] = blocks[0] % 10000; blocks[0] /= 10000;
        blocks[1] = hlp::out[blocks[1]];
        blocks[2] |= 0x30303030;
        b--;
    }
 
    if (blocks[0]) {
        blocks[0] = hlp::out[blocks[0] % 10000];
        blocks[1] |= 0x30303030;
        b--;
    }
 
    char* f = ((char*)b);
    f += 3 - (*f >> 4);
 
    char* str = (char*)blocks;
    if (o < 0) *--f = '-';
    return std::string(f, (str + 12) - f);
}