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Code Issues 1 Releases Wiki Activity

Use memmove in buffer/blit when needed.

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This commit is contained in:
Calvin Rose 2019-05-08 09:29:21 -04:00
parent 65ac17986a
commit fff60b053b
1 changed files with 6 additions and 2 deletions
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8
src/core/buffer.c
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@ -315,9 +315,13 @@ static Janet cfun_buffer_blit(int32_t argc, Janet *argv) {
if (last > INT32_MAX)
janet_panic("buffer blit out of range");
janet_buffer_ensure(dest, (int32_t) last, 2);
if (same_buf) src.bytes = dest->data;
if (last > dest->count) dest->count = (int32_t) last;
memcpy(dest->data + offset_dest, src.bytes + offset_src, length_src);
if (same_buf) {
src.bytes = dest->data;
memmove(dest->data + offset_dest, src.bytes + offset_src, length_src);
} else {
memcpy(dest->data + offset_dest, src.bytes + offset_src, length_src);
}
return argv[0];
}