value_dict.c

   1 /*
   2  * This file is part of ltrace.
   3  * Copyright (C) 2011,2012 Petr Machata, Red Hat Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  */
  20
  21 #include <assert.h>
  22 #include <string.h>
  23 #include <stdlib.h>
  24
  25 #include "value_dict.h"
  26 #include "value.h"
  27
  28 struct named_value
  29 {
  30         const char *name;
  31         struct value value;
  32         int own_name;
  33 };
  34
  35 void
  36 val_dict_init(struct value_dict *dict)
  37 {
  38         VECT_INIT(&dict->numbered, struct value);
  39         VECT_INIT(&dict->named, struct named_value);
  40 }
  41
  42 static int
  43 value_clone_cb(struct value *tgt, const struct value *src, void *data)
  44 {
  45         return value_clone(tgt, src);
  46 }
  47
  48 static void
  49 value_dtor(struct value *val, void *data)
  50 {
  51         value_destroy(val);
  52 }
  53
  54 static int
  55 named_value_clone(struct named_value *tgt,
  56                   const struct named_value *src, void *data)
  57 {
  58         tgt->name = strdup(src->name);
  59         if (tgt->name == NULL)
  60                 return -1;
  61         tgt->own_name = 1;
  62         if (value_clone(&tgt->value, &src->value) < 0) {
  63                 free((char *)tgt->name);
  64                 return -1;
  65         }
  66         return 0;
  67 }
  68
  69 static void
  70 named_value_dtor(struct named_value *named, void *data)
  71 {
  72         if (named->own_name)
  73                 free((char *)named->name);
  74         value_destroy(&named->value);
  75 }
  76
  77 int
  78 val_dict_clone(struct value_dict *target, struct value_dict *source)
  79 {
  80         if (VECT_CLONE(&target->numbered, &source->numbered, struct value,
  81                        value_clone_cb, value_dtor, NULL) < 0)
  82                 return -1;
  83
  84         if (VECT_CLONE(&target->named, &source->named, struct named_value,
  85                        named_value_clone, named_value_dtor, NULL) < 0) {
  86                 VECT_DESTROY(&target->numbered, struct value, value_dtor, NULL);
  87                 return -1;
  88         }
  89
  90         return 0;
  91 }
  92
  93 int
  94 val_dict_push_next(struct value_dict *dict, struct value *val)
  95 {
  96         return VECT_PUSHBACK(&dict->numbered, val);
  97 }
  98
  99 int
 100 val_dict_push_named(struct value_dict *dict, struct value *val,
 101                     const char *name, int own_name)
 102 {
 103         if (own_name && (name = strdup(name)) == NULL)
 104                 return -1;
 105         struct named_value element = { name, *val, own_name };
 106         if (VECT_PUSHBACK(&dict->named, &element) < 0) {
 107                 if (own_name)
 108                         free((char *)name);
 109                 return -1;
 110         }
 111         return 0;
 112 }
 113
 114 size_t
 115 val_dict_count(struct value_dict *dict)
 116 {
 117         return vect_size(&dict->numbered);
 118 }
 119
 120 struct value *
 121 val_dict_get_num(struct value_dict *dict, size_t num)
 122 {
 123         assert(num < vect_size(&dict->numbered));
 124         return VECT_ELEMENT(&dict->numbered, struct value, num);
 125 }
 126
 127 struct value *
 128 val_dict_get_name(struct value_dict *dict, const char *name)
 129 {
 130         size_t i;
 131         for (i = 0; i < vect_size(&dict->named); ++i) {
 132                 struct named_value *element
 133                         = VECT_ELEMENT(&dict->named, struct named_value, i);
 134                 if (strcmp(element->name, name) == 0)
 135                         return &element->value;
 136         }
 137         return NULL;
 138 }
 139
 140 void
 141 val_dict_destroy(struct value_dict *dict)
 142 {
 143         if (dict == NULL)
 144                 return;
 145
 146         VECT_DESTROY(&dict->numbered, struct value, value_dtor, NULL);
 147         VECT_DESTROY(&dict->named, struct named_value, named_value_dtor, NULL);
 148 }