26 lines
751 B
C
26 lines
751 B
C
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#include "bech32_util.h"
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#include <ccan/tal/tal.h>
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static u8 get_bit(const u8 *src, size_t bitoff)
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{
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return ((src[bitoff / 8] >> (7 - (bitoff % 8))) & 1);
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}
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void bech32_push_bits(u5 **data, const void *src, size_t nbits)
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{
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size_t i, b;
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size_t data_len = tal_len(*data);
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for (i = 0; i < nbits; i += b) {
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tal_resize(data, data_len+1);
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(*data)[data_len] = 0;
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for (b = 0; b < 5; b++) {
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(*data)[data_len] <<= 1;
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/* If we need bits we don't have, zero */
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if (i+b < nbits)
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(*data)[data_len] |= get_bit(src, i+b);
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}
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data_len++;
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}
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}
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