kc3-lang/kc3/pdf/pdf_name.c

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• Hash : 8def86d1
  Author : Thomas de Grivel
  Date : 2025-09-24T00:44:42
  

  fix pdf_name_delete_all use after free
  

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• pdf/pdf_name.c

• /* kc3
   * Copyright from 2022 to 2025 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 "../libkc3/kc3.h"
  #include "pdf_name.h"
  
  p_pdf_name_list g_pdf_name_list = NULL;
  
  p_pdf_name pdf_name_1 (p_pdf_name_list *name_list, const char *pchar)
  {
    s_str str;
    str_init_1(&str, NULL, pchar);
    return pdf_name_from_str(name_list, &str);
  }
  
  void kc3_pdf_name_list_delete_all (void)
  {
    pdf_name_list_delete_all(&g_pdf_name_list);
  }
  
  p_pdf_name pdf_name_find (p_pdf_name_list *name_list,
                            const s_str *str)
  {
    p_pdf_name_list list;
    assert(name_list);
    assert(str);
    list = *name_list;
    while (list) {
      p_pdf_name name = list->sym;
      if (compare_str(str, &name->str) == 0)
        return name;
      list = list->next;
    }
    return NULL;
  }
  
  p_pdf_name pdf_name_from_str (p_pdf_name_list *name_list,
                                const s_str *str)
  {
    p_pdf_name name;
    assert(str);
    if (! name_list)
      name_list = &g_pdf_name_list;
    if (! (name = pdf_name_find(name_list, str)))
      name = pdf_name_new(name_list, str);
    return name;
  }
  
  void pdf_name_list_delete_all (p_pdf_name_list *name_list)
  {
    p_pdf_name_list list;
    p_pdf_name_list next;
    assert(name_list);
    list = *name_list;
    while (list) {
      next = list->next;
      sym_delete(list->free_sym);
      free(list);
      list = next;
    }
    *name_list = NULL;
  }
  
  p_pdf_name pdf_name_new (p_pdf_name_list *name_list,
                           const s_str *str)
  {
    s_sym *sym;
    s_sym_list *tmp;
    if (! (sym = alloc(sizeof(s_sym))))
      return NULL;
    if (! (tmp = alloc(sizeof(s_sym_list)))) {
      free(sym);
      return NULL;
    }
    str_init_copy(&sym->str, str);
    tmp->sym = sym;
    tmp->free_sym = sym;
    tmp->next = *name_list;
    *name_list = tmp;
    return sym;
  
  }
  

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