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                         psi_token_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                 if (arg->type->real.func->func->type->type == PSI_T_FUNCTION) {
  65                         dprintf(fd, "(");
  66                 }
  67                 dprintf(fd, " %s(*%s)",
  68                                 psi_t_indirection(arg->var->pointer_level - !! arg->var->array_size),
  69                                 arg->var->name->val);
  70                 dprintf(fd, "(");
  71                 if (arg->type->real.func->args) {
  72                         size_t j = 0;
  73                         struct psi_decl_arg *farg;
  74
  75                         ++level;
  76                         while (psi_plist_get(arg->type->real.func->args, j++, &farg)) {
  77                                 if (j > 1) {
  78                                         dprintf(fd, ", ");
  79                                 }
  80                                 psi_decl_arg_dump(fd, farg, level);
  81                         }
  82                         --level;
  83                         if (arg->type->real.func->varargs) {
  84                                 dprintf(fd, ", ...");
  85                         }
  86                 }
  87                 dprintf(fd, ")");
  88                 if (arg->type->real.func->func->type->type == PSI_T_FUNCTION) {
  89                         struct psi_decl *decl = arg->type->real.func->func->type->real.func;
  90
  91                         dprintf(fd, "(");
  92                         if (decl->args) {
  93                                 size_t i;
  94                                 struct psi_decl_arg *arg;
  95
  96                                 for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
  97                                         if (i) {
  98                                                 dprintf(fd, ", ");
  99                                         }
 100                                         psi_decl_arg_dump(fd, arg, 0);
 101                                 }
 102                                 if (decl->varargs) {
 103                                         dprintf(fd, ", ...");
 104                                 }
 105                         }
 106                         dprintf(fd, "))");
 107                 }
 108         } else {
 109                 psi_decl_type_dump(fd, arg->type, level);
 110                 dprintf(fd, " ");
 111                 psi_decl_var_dump(fd, arg->var);
 112         }
 113 }
 114
 115 bool psi_decl_arg_validate(struct psi_data *data, struct psi_decl_arg *arg,
 116                 struct psi_validate_scope *scope)
 117 {
 118         if (!psi_decl_type_validate(data, arg->type, NULL, scope)) {
 119                  if (!arg->var->pointer_level) {
 120                         data->error(data, arg->type->token, PSI_WARNING,
 121                                         "Cannot use '%s' as type for '%s'%s%s", arg->type->name,
 122                                         arg->var->name, *data->last_error ? ": " : "", data->last_error);
 123                         return false;
 124                  }
 125         }
 126         return true;
 127 }
 128
 129 bool psi_decl_arg_validate_typedef(struct psi_data *data,
 130                 struct psi_decl_arg *def, struct psi_validate_scope *scope)
 131 {
 132         if (psi_validate_scope_has_type(scope, def->var->name)) {
 133                 return true;
 134         }
 135         psi_validate_scope_add_type(scope, def->var->name, def);
 136
 137         if (def->type->type == PSI_T_VOID) {
 138                 if (def->var->pointer_level) {
 139                         def->type->type = PSI_T_POINTER;
 140                 } else {
 141                         data->error(data, def->token, PSI_WARNING,
 142                                         "Type '%s' cannot be aliased to 'void'", def->type->name->val);
 143                         return false;
 144                 }
 145         } else if (!psi_decl_type_validate(data, def->type, def, scope)) {
 146                 const char *pre;
 147
 148                 switch (def->type->type) {
 149                 case PSI_T_STRUCT:
 150                         pre = "struct ";
 151                         break;
 152                 case PSI_T_UNION:
 153                         pre = "union ";
 154                         break;
 155                 case PSI_T_ENUM:
 156                         pre = "enum ";
 157                         break;
 158                 default:
 159                         pre = "";
 160                         break;
 161                 }
 162                 data->error(data, def->token, PSI_WARNING,
 163                                 "Type '%s' cannot be aliased to '%s%s'%s%s", def->var->name, pre,
 164                                 def->type->name->val, *data->last_error ? ": " : "", data->last_error);
 165                 return false;
 166         }
 167
 168         return true;
 169 }
 170
 171 bool psi_decl_arg_is_pointer(struct psi_decl_arg *darg)
 172 {
 173         if (darg->var->pointer_level) {
 174                 if (darg->var->array_size) {
 175                         return darg->var->pointer_level > 1;
 176                 }
 177                 return true;
 178         } else if (psi_decl_type_is_weak(darg->type) && darg->type->real.def) {
 179                 return psi_decl_arg_is_pointer(darg->type->real.def);
 180         }
 181         return false;
 182 }
 183
 184 size_t psi_decl_arg_align(struct psi_decl_arg *darg, size_t *pos, size_t *len)
 185 {
 186         size_t align = psi_decl_arg_get_align(darg);
 187
 188         if (align) {
 189                 *len = psi_decl_arg_get_size(darg);
 190                 *pos = psi_align(align, *pos);
 191         }
 192
 193         return align;
 194 }
 195
 196 size_t psi_decl_arg_get_align(struct psi_decl_arg *darg)
 197 {
 198         size_t align;
 199
 200         if (psi_decl_arg_is_pointer(darg)) {
 201                 align = psi_t_alignment(PSI_T_POINTER);
 202         } else {
 203                 align = psi_decl_type_get_align(darg->type);
 204         }
 205
 206         return align;
 207 }
 208
 209 size_t psi_decl_arg_get_size(struct psi_decl_arg *darg)
 210 {
 211         size_t size;
 212         struct psi_decl_type *real = psi_decl_type_get_real(darg->type);
 213
 214         if (darg->var->array_size && darg->var->pointer_level > 1) {
 215                 size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
 216         } else if (psi_decl_arg_is_pointer(darg)) {
 217                 size = psi_t_size(PSI_T_POINTER);
 218         } else {
 219                 switch (real->type) {
 220                 case PSI_T_UNION:
 221                         size = real->real.unn->size;
 222                         break;
 223                 case PSI_T_STRUCT:
 224                         size = real->real.strct->size;
 225                         break;
 226                 case PSI_T_ENUM:
 227                 default:
 228                         size = psi_t_size(real->type);
 229                         break;
 230                 }
 231
 232                 if (darg->var->array_size) {
 233                         size *= darg->var->array_size;
 234                 }
 235         }
 236
 237         return size;
 238 }
 239
 240 struct psi_decl_arg *psi_decl_arg_get_by_name(struct psi_plist *args,
 241                 zend_string *name)
 242 {
 243         size_t i = 0;
 244         struct psi_decl_arg *arg;
 245
 246         if (args)
 247                 while (psi_plist_get(args, i++, &arg)) {
 248                         if (zend_string_equals(name, arg->var->name)) {
 249                                 return arg;
 250                         }
 251                 }
 252
 253         return NULL;
 254 }
 255
 256 struct psi_decl_arg *psi_decl_arg_get_by_var(struct psi_decl_var *var,
 257                 struct psi_plist *args, struct psi_decl_arg *func)
 258 {
 259         struct psi_decl_arg *arg = psi_decl_arg_get_by_name(args, var->name);
 260
 261         if (arg) {
 262                 assert(!var->arg || var->arg == arg);
 263
 264                 return var->arg = arg;
 265         }
 266
 267         if (func && zend_string_equals(var->name, func->var->name)) {
 268                 return var->arg = func;
 269         }
 270
 271         return NULL;
 272 }