kc3-lang/kc3/libc3/struct_type.c

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• Hash : d3850bfa
  Author : Thomas de Grivel
  Date : 2024-01-23T17:23:32
  

  demo_gl_asan

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• libc3/struct_type.c

• /* 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);
  }
  
  bool struct_type_exists (const s_sym *module)
  {
    return env_struct_type_exists(&g_c3_env, module);
  }
  
  const s_struct_type * struct_type_find (const s_sym *module)
  {
    return env_struct_type_find(&g_c3_env, module);
  }
  
  s_struct_type * struct_type_init (s_struct_type *st,
                                    const s_sym *module,
                                    const s_list *spec)
  {
    uw count;
    uw i;
    bool must_clean;
    uw offset;
    const s_list *s;
    uw size;
    const s_tuple *tuple;
    const s_sym *type;
    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;
    }
    st->must_clean = false;
    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;
      }
      tuple = &s->tag.data.tuple;
      if (! tag_size(tuple->tag + 1, &size)) {
        map_clean(&st->map);
        free(st->offset);
        return NULL;
      }
      tag_init_copy(st->map.key + i,   tuple->tag + 0);
      tag_init_copy(st->map.value + i, tuple->tag + 1);
      tag_type(st->map.value + i, &type);
      if (! sym_must_clean(type, &must_clean)) {
        map_clean(&st->map);
        free(st->offset);
        return NULL;
      }
      if (must_clean)
        st->must_clean = true;
      offset = struct_type_padding(offset, size);
      st->offset[i] = offset;
      offset += size;
      i++;
      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)
  {
    s_list *spec;
    assert(st);
    assert(module);
    assert(env);
    if (! env_struct_type_get_spec(env, module, &spec) ||
        ! spec)
      return NULL;
    if (! struct_type_init(st, module, spec))
      return NULL;
    list_delete_all(spec);
    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;
  }
  

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