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bitvector tweaks

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* libguile/arrays.c (scm_from_contiguous_typed_array):
* libguile/bytevectors.c (scm_uniform_array_to_bytevector): Error if the
  uniform element size is more than 8 bits, but not divisible by 8 --
  because our math could overflow in that case.

* module/ice-9/deprecated.scm (#\y): Indeed, #* is the valid bitvector
  syntax :)
This commit is contained in:
Andy Wingo 2009-10-16 11:59:30 +02:00
parent 96e15df109
commit b0fae4ecaa
3 changed files with 9 additions and 3 deletions
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5
libguile/bytevectors.c
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@ -604,9 +604,12 @@ SCM_DEFINE (scm_uniform_array_to_bytevector, "uniform-array->bytevector",
sz = scm_array_handle_uniform_element_bit_size (&h);
if (sz >= 8 && ((sz % 8) == 0))
byte_len = len * (sz / 8);
else
else if (sz < 8)
/* byte_len = ceil (len * sz / 8) */
byte_len = (len * sz + 7) / 8;
else
/* an internal guile error, really */
SCM_MISC_ERROR ("uniform elements larger than 8 bits must fill whole bytes", SCM_EOL);
ret = make_bytevector (byte_len, SCM_ARRAY_ELEMENT_TYPE_VU8);
memcpy (SCM_BYTEVECTOR_CONTENTS (ret), elts, byte_len);