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@@ -51,9 +51,10 @@ base32_encode(char *dest, size_t destlen, const char *src, size_t srclen)
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for (i=0,bit=0; bit < nbits; ++i, bit+=5) {
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/* set v to the 16-bit value starting at src[bits/8], 0-padded. */
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- v = ((uint8_t)src[bit/8]) << 8;
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- if (bit+5<nbits)
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- v += (uint8_t)src[(bit/8)+1];
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+ size_t idx = bit / 8;
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+ v = ((uint8_t)src[idx]) << 8;
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+ if (idx+1 < srclen)
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+ v += (uint8_t)src[idx+1];
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/* set u to the 5-bit value at the bit'th bit of buf. */
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u = (v >> (11-(bit%8))) & 0x1F;
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dest[i] = BASE32_CHARS[u];
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