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Fix breakage of SRFI-4 C accessors

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* libguile/srfi-4.c (DEFINE_SRFI_4_C_FUNCS): Fix bad assumption that
  width was a byte width.  Thanks very much to Barry Fishman for the
  report, and to Daniel Llorens for tracking it down.

* test-suite/standalone/Makefile.am (test_srfi_4_CFLAGS):
* test-suite/standalone/test-srfi-4.c: Add test.
This commit is contained in:
Andy Wingo 2014-03-19 22:41:19 +01:00
parent 92b793da2b
commit 2be7131ee0
3 changed files with 97 additions and 2 deletions
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5
libguile/srfi-4.c
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@ -137,12 +137,13 @@
scm_t_array_handle *h, \
size_t *lenp, ssize_t *incp) \
{ \
size_t byte_width = width * sizeof (ctype); \
if (!scm_is_bytevector (uvec) \
|| (scm_c_bytevector_length (uvec) % width)) \
|| (scm_c_bytevector_length (uvec) % byte_width)) \
scm_wrong_type_arg_msg (NULL, 0, uvec, #tag "vector"); \
scm_array_get_handle (uvec, h); \
if (lenp) \
*lenp = scm_c_bytevector_length (uvec) / width; \
*lenp = scm_c_bytevector_length (uvec) / byte_width; \
if (incp) \
*incp = 1; \
return ((ctype *)h->writable_elements); \