kc3-lang/kc3/libkc3/ptr.c

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• Hash : ed2cf4e6
  Author : Thomas de Grivel
  Date : 2024-08-21T18:57:05
  

  make Var work, add operator var_assign (<-)

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• libkc3/ptr.c

• /* kc3
   * Copyright 2022,2023,2024 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 "alloc.h"
  #include "assert.h"
  #include "integer.h"
  #include "ptr.h"
  #include "sym.h"
  #include "tag_type.h"
  
  void ptr_delete (u_ptr_w *ptr)
  {
    assert(ptr);
    free(ptr);
  }
  
  u_ptr_w * ptr_init (u_ptr_w *ptr, void *p)
  {
    u_ptr_w tmp = {0};
    assert(ptr);
    tmp.p = p;
    *ptr = tmp;
    return ptr;
  }
  
  u_ptr_w * ptr_init_cast (u_ptr_w *p,
                           const s_sym * const *type,
                           const s_tag *tag)
  {
    assert(p);
    assert(type);
    assert(tag);
    switch (tag->type) {
    case TAG_F32: p->p = (void *) ((uw) tag->data.f32);  return p;
    case TAG_F64: p->p = (void *) ((uw) tag->data.f64);  return p;
    case TAG_INTEGER:
      p->p = (void *) integer_to_uw(&tag->data.integer); return p;
    case TAG_PTR: *p = tag->data.ptr;                    return p;
    case TAG_PTR_FREE: p->p = tag->data.ptr_free.p;      return p;
    case TAG_S8:  p->p = (void *) ((uw) tag->data.s8);   return p;
    case TAG_S16: p->p = (void *) ((uw) tag->data.s16);  return p;
    case TAG_S32: p->p = (void *) ((uw) tag->data.s32);  return p;
    case TAG_S64: p->p = (void *) ((uw) tag->data.s64);  return p;
    case TAG_SW:  p->p = (void *) ((uw) tag->data.sw);   return p;
    case TAG_U8:  p->p = (void *) ((uw) tag->data.u8);   return p;
    case TAG_U16: p->p = (void *) ((uw) tag->data.u16);  return p;
    case TAG_U32: p->p = (void *) ((uw) tag->data.u32);  return p;
    case TAG_U64: p->p = (void *) ((uw) tag->data.u64);  return p;
    case TAG_UW:  p->p = (void *) ((uw) tag->data.uw);   return p;
    case TAG_VAR: p->p = tag->data.var.ptr;              return p;
    default:
      break;
    }
    err_write_1("ptr_cast: cannot cast ");
    err_write_1(tag_type_to_string(tag->type));
    if (*type == &g_sym_Ptr)
      err_puts(" to Ptr");
    else {
      err_write_1(" to ");
      err_inspect_sym(type);
      err_puts(" aka Ptr");
    }
    assert(! "ptr_cast: cannot cast to Ptr");
    return NULL;
  }
  
  u_ptr_w * ptr_init_copy (u_ptr_w *ptr, const u_ptr_w *src)
  {
    assert(ptr);
    assert(src);
    *ptr = *src;
    return ptr;
  }
  
  u_ptr_w * ptr_new (void *p)
  {
    u_ptr_w *ptr;
    ptr = alloc(sizeof(u_ptr_w));
    if (! ptr)
      return NULL;
    if (! ptr_init(ptr, p)) {
      free(ptr);
      return NULL;
    }
    return ptr;
  }
  
  u_ptr_w * ptr_new_copy (const u_ptr_w *src)
  {
    u_ptr_w *ptr;
    assert(src);
    ptr = alloc(sizeof(u_ptr_w));
    if (! ptr)
      return NULL;
    if (! ptr_init_copy(ptr, src)) {
      free(ptr);
      return NULL;
    }
    return ptr;
  }
  

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