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#include <stdlib.h>
#include <string.h>
#include <stdint.h>
static const char digits[] =
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
long a64l(const char *s)
{
int e;
uint32_t x = 0;
for (e=0; e<36 && *s; e+=6, s++) {
const char *d = strchr(digits, *s);
if (!d) break;
x |= (uint32_t)(d-digits)<<e;
}
return (int32_t)x;
}
char *l64a(long x0)
{
static char s[7];
char *p;
uint32_t x = x0;
for (p=s; x; p++, x>>=6)
*p = digits[x&63];
*p = 0;
return s;
}
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