Hash :
36d32503
Author :
Thomas de Grivel
Date :
2023-12-10T23:48:01
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/* c3
* Copyright 2022,2023 kmx.io <contact@kmx.io>
*
* Permission is hereby granted to use this software granted the above
* copyright notice and this permission paragraph are included in all
* copies and substantial portions of this software.
*
* THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
* PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
* AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
* THIS SOFTWARE.
*/
#include <assert.h>
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include "env.h"
#include "list.h"
#include "map.h"
#include "struct.h"
#include "struct_type.h"
#include "sym.h"
#include "tag.h"
#include "tag_init.h"
#include "tag_type.h"
void struct_type_clean (s_struct_type *st)
{
assert(st);
map_clean(&st->map);
free(st->offset);
}
void struct_type_delete (s_struct_type *st)
{
assert(st);
struct_type_clean(st);
free(st);
}
s_struct_type * struct_type_init (s_struct_type *st, const s_sym *module,
const s_list *spec)
{
uw count;
uw i;
uw offset;
const s_list *s;
uw size;
assert(st);
assert(module);
assert(spec);
count = list_length(spec);
st->module = module;
if (! map_init(&st->map, count))
return NULL;
st->offset = calloc(count, sizeof(uw));
if (! st->offset) {
warn("struct_type_init: offset array of size %lu", count);
map_clean(&st->map);
return NULL;
}
offset = 0;
i = 0;
s = spec;
while (s) {
if (s->tag.type != TAG_TUPLE || s->tag.data.tuple.count != 2) {
warn("struct_type_init: invalid spec");
map_clean(&st->map);
free(st->offset);
return NULL;
}
tag_init_copy(st->map.key + i, s->tag.data.tuple.tag + 0);
tag_init_copy(st->map.value + i, s->tag.data.tuple.tag + 1);
size = tag_size(st->map.value + i);
offset = struct_type_padding(offset, size);
st->offset[i] = offset;
offset += size;
s = list_next(s);
}
st->size = offset;
return st;
}
s_struct_type * struct_type_init_copy (s_struct_type *s,
const s_struct_type *src)
{
s_struct_type tmp;
assert(s);
assert(src);
assert(src->module);
assert(src->map.count);
tmp.module = src->module;
if (! map_init_copy(&tmp.map, &src->map))
return NULL;
tmp.offset = calloc(tmp.map.count, sizeof(uw));
if (! tmp.offset) {
warn("struct_type_init_copy: offset array of size %lu",
tmp.map.count);
map_clean(&tmp.map);
return NULL;
}
memcpy(tmp.offset, src->offset, tmp.map.count * sizeof(uw));
tmp.size = src->size;
*s = tmp;
return s;
}
s_struct_type * struct_type_init_from_env (s_struct_type *st,
const s_sym *module,
s_env *env)
{
const s_list *spec;
assert(st);
assert(module);
assert(env);
spec = env_get_struct_type_spec(env, module);
if (! spec)
return NULL;
if (! struct_type_init(st, module, spec))
return NULL;
return st;
}
s_struct_type * struct_type_new (const s_sym *module,
const s_list *spec)
{
s_struct_type *st;
assert(module);
st = calloc(1, sizeof(s_struct_type));
if (! st) {
warn("struct_type_new: %s: calloc", module->str.ptr.ps8);
return NULL;
}
if (! struct_type_init(st, module, spec)) {
free(st);
return NULL;
}
return st;
}
uw struct_type_padding (uw offset, uw size)
{
unsigned int align = 1;
if (size == 2)
align = 2;
else if (size == 4)
align = 4;
else if (size == 8)
align = 8;
else if (size == 16)
align = 16;
return (offset + align - 1) / align * align;
}