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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++)
- x |= (strchr(digits, *s)-digits)<<e;
- return 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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