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add bytevector<->list

This commit is contained in:
Yuichi Nishiwaki 2014-09-12 21:14:45 +09:00
parent 45d894d9f8
commit 1b97362653
1 changed files with 51 additions and 0 deletions
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51
blob.c
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@ -6,6 +6,7 @@
#include "picrin.h"
#include "picrin/blob.h"
#include "picrin/pair.h"
char *
pic_strndup(pic_state *pic, const char *s, size_t n)
@ -182,6 +183,54 @@ pic_blob_bytevector_append(pic_state *pic)
return pic_obj_value(blob);
}
static pic_value
pic_blob_list_to_bytevector(pic_state *pic)
{
pic_blob *blob;
char *data;
pic_value list, e;
pic_get_args(pic, "o", &list);
blob = pic_make_blob(pic, pic_length(pic, list));
data = blob->data;
pic_for_each (e, list) {
pic_assert_type(pic, e, int);
if (pic_int(e) < 0 || pic_int(e) > 255)
pic_error(pic, "byte out of range");
*data++ = pic_int(e);
}
return pic_obj_value(blob);
}
static pic_value
pic_blob_bytevector_to_list(pic_state *pic)
{
pic_blob *blob;
pic_value list;
int n, start, end, i;
n = pic_get_args(pic, "b|ii", &blob, &start, &end);
switch (n) {
case 1:
start = 0;
case 2:
end = blob->len;
}
list = pic_nil_value();
for (i = start; i < end; ++i) {
pic_push(pic, pic_int_value(blob->data[i]), list);
}
return pic_reverse(pic, list);
}
void
pic_init_blob(pic_state *pic)
{
@ -193,4 +242,6 @@ pic_init_blob(pic_state *pic)
pic_defun(pic, "bytevector-copy!", pic_blob_bytevector_copy_i);
pic_defun(pic, "bytevector-copy", pic_blob_bytevector_copy);
pic_defun(pic, "bytevector-append", pic_blob_bytevector_append);
pic_defun(pic, "bytevector->list", pic_blob_bytevector_to_list);
pic_defun(pic, "list->bytevector", pic_blob_list_to_bytevector);
}