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