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#include <types.h>
size_t strlen(const char* s)
{
char *p = (char*)s;
while (*p) p++;
return p - s;
}
uint64_t stoi(const char *s)
{
uint64_t num = 0;
size_t n = strlen(s);
for (size_t i = 0; i < n; i++) {
num *= 10;
num += s[i] - '0';
}
return num;
}
void strrev(char *s)
{
size_t n = strlen(s);
char a[100];
for (size_t i = 0; i < n; i++) {
a[i] = s[n - 1 - i];
}
for (size_t i = 0; i < n; i++) {
s[i] = a[i];
}
}
void itos(uint64_t num, char* s)
{
size_t i;
for (i = 0; num; num/=10, i++) {
s[i] = '0' + num%10;
}
s[i] = '\0';
strrev(s);
}
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