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#include <lcq/pit/runtime/value/bytes.h>
bool pit_value_is_bytes(pit_runtime *rt, pit_value a) {
return pit_value_is_ref_heavy_sort(rt, a, PIT_VALUE_HEAVY_SORT_BYTES);
}
pit_value pit_value_bytes_new(pit_runtime *rt, u8 *buf, i64 len) {
u8 *dest = pit_arena_alloc_back(rt->heap, len);
if (!dest) { pit_error(rt, "failed to allocate bytes"); return PIT_NIL; }
pit_libc_string_memcpy(dest, buf, (size_t) len);
pit_value ret = pit_value_ref_heavy_new(rt);
pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, ret));
if (!h) { pit_error(rt, "failed to create new heavy value for bytes"); return PIT_NIL; }
h->hsort = PIT_VALUE_HEAVY_SORT_BYTES;
h->in.bytes.data = dest;
h->in.bytes.len = len;
return ret;
}
pit_value pit_value_bytes_new_cstr(pit_runtime *rt, char *s) {
return pit_value_bytes_new(rt, (u8 *) s, (i64) pit_libc_string_strlen(s));
}
/* return true if v is a reference to bytes that are the same as those in buf */
bool pit_value_bytes_match(pit_runtime *rt, pit_value v, u8 *buf, i64 len) {
if (pit_value_sort(v) != PIT_VALUE_SORT_REF) return false;
pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, v));
if (!h) { pit_error(rt, "bad ref"); return false; }
if (h->hsort != PIT_VALUE_HEAVY_SORT_BYTES) return false;
if (h->in.bytes.len != len) return false;
for (i64 i = 0; i < len; ++i)
if (h->in.bytes.data[i] != buf[i]) {
return false;
}
return true;
}
i64 pit_value_bytes_copy(pit_runtime *rt, pit_value v, u8 *buf, i64 maxlen) {
if (pit_value_sort(v) != PIT_VALUE_SORT_REF) { pit_error(rt, "not a ref"); return -1; }
pit_value_heavy *h = pit_value_ref_deref(rt, pit_value_as_ref(rt, v));
if (!h) { pit_error(rt, "bad ref"); return -1; }
if (h->hsort != PIT_VALUE_HEAVY_SORT_BYTES) {
pit_error(rt, "invalid use of value as bytes");
return -1;
}
i64 len = maxlen < h->in.bytes.len ? maxlen : h->in.bytes.len;
for (i64 i = 0; i < len; ++i) {
buf[i] = h->in.bytes.data[i];
}
return len;
}
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