git.m6w6.name Git - m6w6/ext-psi/blob - src/types/decl_arg.c

   1 /*******************************************************************************
   2  Copyright (c) 2016, Michael Wallner <mike@php.net>.
   3  All rights reserved.
   4
   5  Redistribution and use in source and binary forms, with or without
   6  modification, are permitted provided that the following conditions are met:
   7
   8  * Redistributions of source code must retain the above copyright notice,
   9  this list of conditions and the following disclaimer.
  10  * Redistributions in binary form must reproduce the above copyright
  11  notice, this list of conditions and the following disclaimer in the
  12  documentation and/or other materials provided with the distribution.
  13
  14  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  15  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  18  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  21  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  22  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *******************************************************************************/
  25
  26 #include "php_psi_stdinc.h"
  27 #include <assert.h>
  28
  29 #include "data.h"
  30
  31 struct psi_decl_arg *psi_decl_arg_init(struct psi_decl_type *type,
  32                 struct psi_decl_var *var)
  33 {
  34         struct psi_decl_arg *arg = calloc(1, sizeof(*arg));
  35         arg->token = var->token;
  36         arg->type = type;
  37         arg->var = var;
  38         var->arg = arg;
  39         return arg;
  40 }
  41
  42 void psi_decl_arg_free(struct psi_decl_arg **arg_ptr)
  43 {
  44         if (*arg_ptr) {
  45                 struct psi_decl_arg *arg = *arg_ptr;
  46
  47                 *arg_ptr = NULL;
  48                 if (arg->token && arg->token != arg->var->token) {
  49                         free(arg->token);
  50                 }
  51                 psi_decl_type_free(&arg->type);
  52                 psi_decl_var_free(&arg->var);
  53                 if (arg->layout) {
  54                         psi_layout_free(&arg->layout);
  55                 }
  56                 free(arg);
  57         }
  58 }
  59
  60 void psi_decl_arg_dump(int fd, struct psi_decl_arg *arg, unsigned level)
  61 {
  62         if (arg->type->type == PSI_T_FUNCTION) {
  63                 psi_decl_type_dump(fd, arg->type->real.func->func->type, level);
  64                 dprintf(fd, " (*");
  65                 psi_decl_var_dump(fd, arg->var);
  66                 dprintf(fd, ")(");
  67                 if (arg->type->real.func->args) {
  68                         size_t j = 0;
  69                         struct psi_decl_arg *farg;
  70
  71                         ++level;
  72                         while (psi_plist_get(arg->type->real.func->args, j++, &farg)) {
  73                                 if (j > 1) {
  74                                         dprintf(fd, ", ");
  75                                 }
  76                                 psi_decl_arg_dump(fd, farg, level);
  77                         }
  78                         --level;
  79                         if (arg->type->real.func->varargs) {
  80                                 dprintf(fd, ", ...");
  81                         }
  82                 }
  83                 dprintf(fd, ")");
  84         } else {
  85                 psi_decl_type_dump(fd, arg->type, level);
  86                 dprintf(fd, " ");
  87                 psi_decl_var_dump(fd, arg->var);
  88         }
  89 }
  90
  91 bool psi_decl_arg_validate(struct psi_data *data, struct psi_decl_arg *arg)
  92 {
  93         if (!psi_decl_type_validate(data, arg->type, NULL)) {
  94                 data->error(data, arg->type->token, PSI_WARNING,
  95                                 "Cannot use '%s' as type for '%s': %s", arg->type->name,
  96                                 arg->var->name, data->last_error);
  97                 return false;
  98         }
  99         return true;
 100 }
 101
 102 bool psi_decl_arg_validate_typedef(struct psi_data *data, struct psi_decl_arg *def)
 103 {
 104         if (!psi_decl_type_validate(data, def->type, def)) {
 105                 const char *pre;
 106
 107                 switch (def->type->type) {
 108                 case PSI_T_STRUCT:
 109                         pre = "struct ";
 110                         break;
 111                 case PSI_T_UNION:
 112                         pre = "union ";
 113                         break;
 114                 case PSI_T_ENUM:
 115                         pre = "enum ";
 116                         break;
 117                 default:
 118                         pre = "";
 119                         break;
 120                 }
 121                 data->error(data, def->token, PSI_WARNING,
 122                                 "Type '%s' cannot be aliased to '%s%s': %s", def->var->name, pre,
 123                                 def->type->name, data->last_error);
 124                 return false;
 125         }
 126         if (def->type->type == PSI_T_VOID) {
 127                 if (def->var->pointer_level) {
 128                         def->type->type = PSI_T_POINTER;
 129                 } else {
 130                         data->error(data, def->token, PSI_WARNING,
 131                                         "Type '%s' cannot be aliased to 'void'", def->type->name);
 132                         return false;
 133                 }
 134         }
 135
 136         return true;
 137 }
 138
 139 size_t psi_decl_arg_align(struct psi_decl_arg *darg, size_t *pos, size_t *len)
 140 {
 141         size_t align = psi_decl_arg_get_align(darg);
 142
 143         assert(align > 0);
 144
 145         *len = psi_decl_arg_get_size(darg);
 146         *pos = psi_align(align, *pos);
 147
 148         return align;
 149 }
 150
 151 size_t psi_decl_arg_get_align(struct psi_decl_arg *darg)
 152 {
 153         size_t align;
 154
 155         if (darg->var->pointer_level
 156                         && (!darg->var->array_size || darg->var->pointer_level > 2)) {
 157                 align = psi_t_alignment(PSI_T_POINTER);
 158         } else {
 159                 align = psi_decl_type_get_align(darg->type);
 160         }
 161
 162         return align;
 163 }
 164
 165 size_t psi_decl_arg_get_size(struct psi_decl_arg *darg)
 166 {
 167         size_t size;
 168         struct psi_decl_type *real = psi_decl_type_get_real(darg->type);
 169
 170         if (darg->var->array_size) {
 171                 if (darg->var->pointer_level > 2) {
 172                         size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
 173                 } else {
 174                         size = psi_t_size(real->type) * darg->var->array_size;
 175                 }
 176         } else if (darg->var->pointer_level) {
 177                 size = psi_t_size(PSI_T_POINTER);
 178         } else {
 179                 switch (real->type) {
 180                 case PSI_T_UNION:
 181                         size = real->real.unn->size;
 182                         break;
 183                 case PSI_T_STRUCT:
 184                         size = real->real.strct->size;
 185                         break;
 186                 case PSI_T_ENUM:
 187                 default:
 188                         size = psi_t_size(real->type);
 189                         break;
 190                 }
 191         }
 192
 193         return size;
 194 }
 195
 196 struct psi_decl_arg *psi_decl_arg_get_by_name(struct psi_plist *args,
 197                 const char *name)
 198 {
 199         size_t i = 0;
 200         struct psi_decl_arg *arg;
 201
 202         if (args)
 203                 while (psi_plist_get(args, i++, &arg)) {
 204                         if (!strcmp(name, arg->var->name)) {
 205                                 return arg;
 206                         }
 207                 }
 208
 209         return NULL;
 210 }
 211
 212 struct psi_decl_arg *psi_decl_arg_get_by_var(struct psi_decl_var *var,
 213                 struct psi_plist *args, struct psi_decl_arg *func)
 214 {
 215         struct psi_decl_arg *arg = psi_decl_arg_get_by_name(args, var->name);
 216
 217         if (arg) {
 218                 assert(!var->arg || var->arg == arg);
 219
 220                 return var->arg = arg;
 221         }
 222
 223         if (func && !strcmp(var->name, func->var->name)) {
 224                 return var->arg = func;
 225         }
 226
 227         return NULL;
 228 }