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C impl: Prevent memcpy undefined behavior #4

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Merged
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Jan 10, 2020
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C impl: Prevent memcpy undefined behavior #4

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3 changes: 3 additions & 0 deletions c/blake3.c
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,9 @@ INLINE size_t chunk_state_len(const blake3_chunk_state *self) {

INLINE size_t chunk_state_fill_buf(blake3_chunk_state *self,
const uint8_t *input, size_t input_len) {
if (input_len == 0) {
return 0;
}
size_t take = BLAKE3_BLOCK_LEN - ((size_t)self->buf_len);
if (take > input_len) {
take = input_len;
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