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author | Andy Wingo <wingo@pobox.com> | 2011-05-30 22:18:48 +0200 |
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committer | Andy Wingo <wingo@pobox.com> | 2011-05-31 11:18:29 +0200 |
commit | f0b7c3c6b9d5ed8b95ed501c24037880815c8325 (patch) | |
tree | 80860756c0c7bfe51adf503623e3ecaba88a323f /libguile/objcodes.c | |
parent | 34ed9dfd1f728cc5d509665d4c6f4b66c4dda02c (diff) | |
download | guile-f0b7c3c6b9d5ed8b95ed501c24037880815c8325.tar.gz |
write-objcode uses target-endianness, target-word-size
* libguile/_scm.h (SCM_OBJCODE_ENDIANNESS_OFFSET):
(SCM_OBJCODE_WORD_SIZE_OFFSET): New defines.
* libguile/objcodes.c (scm_write_objcode): Use target-endianness and
target-word-size when writing the objcode cookie.
Diffstat (limited to 'libguile/objcodes.c')
-rw-r--r-- | libguile/objcodes.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/libguile/objcodes.c b/libguile/objcodes.c index 448badafb..c45ca8585 100644 --- a/libguile/objcodes.c +++ b/libguile/objcodes.c @@ -327,10 +327,38 @@ SCM_DEFINE (scm_write_objcode, "write-objcode", 2, 0, 0, "") #define FUNC_NAME s_scm_write_objcode { + static SCM target_endianness_var = SCM_BOOL_F; + static SCM target_word_size_var = SCM_BOOL_F; + + char cookie[sizeof (SCM_OBJCODE_COOKIE) - 1]; + char endianness; + char word_size; + SCM_VALIDATE_OBJCODE (1, objcode); SCM_VALIDATE_OUTPUT_PORT (2, port); - scm_c_write (port, SCM_OBJCODE_COOKIE, strlen (SCM_OBJCODE_COOKIE)); + if (scm_is_false (target_endianness_var)) + target_endianness_var = + scm_c_public_variable ("system base target", "target-endianness"); + if (scm_is_false (target_word_size_var)) + target_word_size_var = + scm_c_public_variable ("system base target", "target-word-size"); + + endianness = + scm_is_eq (scm_call_0 (scm_variable_ref (target_endianness_var)), + scm_endianness_big) ? 'B' : 'L'; + switch (scm_to_int (scm_call_0 (scm_variable_ref (target_word_size_var)))) + { + case 4: word_size = '4'; break; + case 8: word_size = '8'; break; + default: abort (); + } + + memcpy (cookie, SCM_OBJCODE_COOKIE, strlen (SCM_OBJCODE_COOKIE)); + cookie[SCM_OBJCODE_ENDIANNESS_OFFSET] = endianness; + cookie[SCM_OBJCODE_WORD_SIZE_OFFSET] = word_size; + + scm_c_write (port, cookie, strlen (SCM_OBJCODE_COOKIE)); scm_c_write (port, SCM_OBJCODE_DATA (objcode), sizeof (struct scm_objcode) + SCM_OBJCODE_TOTAL_LEN (objcode)); |