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, " %s(*%s)",
  65                                 psi_t_indirection(arg->var->pointer_level - !! arg->var->array_size),
  66                                 arg->var->name);
  67                 dprintf(fd, "(");
  68                 if (arg->type->real.func->args) {
  69                         size_t j = 0;
  70                         struct psi_decl_arg *farg;
  71
  72                         ++level;
  73                         while (psi_plist_get(arg->type->real.func->args, j++, &farg)) {
  74                                 if (j > 1) {
  75                                         dprintf(fd, ", ");
  76                                 }
  77                                 psi_decl_arg_dump(fd, farg, level);
  78                         }
  79                         --level;
  80                         if (arg->type->real.func->varargs) {
  81                                 dprintf(fd, ", ...");
  82                         }
  83                 }
  84                 dprintf(fd, ")");
  85                 if (arg->var->array_size) {
  86                         dprintf(fd, "[%u]", arg->var->array_size);
  87                 }
  88         } else {
  89                 psi_decl_type_dump(fd, arg->type, level);
  90                 dprintf(fd, " ");
  91                 psi_decl_var_dump(fd, arg->var);
  92         }
  93 }
  94
  95 bool psi_decl_arg_validate(struct psi_data *data, struct psi_decl_arg *arg)
  96 {
  97         if (!psi_decl_type_validate(data, arg->type, NULL)) {
  98                 data->error(data, arg->type->token, PSI_WARNING,
  99                                 "Cannot use '%s' as type for '%s': %s", arg->type->name,
 100                                 arg->var->name, data->last_error);
 101                 return false;
 102         }
 103         return true;
 104 }
 105
 106 bool psi_decl_arg_validate_typedef(struct psi_data *data, struct psi_decl_arg *def)
 107 {
 108         if (!psi_decl_type_validate(data, def->type, def)) {
 109                 const char *pre;
 110
 111                 switch (def->type->type) {
 112                 case PSI_T_STRUCT:
 113                         pre = "struct ";
 114                         break;
 115                 case PSI_T_UNION:
 116                         pre = "union ";
 117                         break;
 118                 case PSI_T_ENUM:
 119                         pre = "enum ";
 120                         break;
 121                 default:
 122                         pre = "";
 123                         break;
 124                 }
 125                 data->error(data, def->token, PSI_WARNING,
 126                                 "Type '%s' cannot be aliased to '%s%s': %s", def->var->name, pre,
 127                                 def->type->name, data->last_error);
 128                 return false;
 129         }
 130         if (def->type->type == PSI_T_VOID) {
 131                 if (def->var->pointer_level) {
 132                         def->type->type = PSI_T_POINTER;
 133                 } else {
 134                         data->error(data, def->token, PSI_WARNING,
 135                                         "Type '%s' cannot be aliased to 'void'", def->type->name);
 136                         return false;
 137                 }
 138         }
 139
 140         return true;
 141 }
 142
 143 size_t psi_decl_arg_align(struct psi_decl_arg *darg, size_t *pos, size_t *len)
 144 {
 145         size_t align = psi_decl_arg_get_align(darg);
 146
 147         assert(align > 0);
 148
 149         *len = psi_decl_arg_get_size(darg);
 150         *pos = psi_align(align, *pos);
 151
 152         return align;
 153 }
 154
 155 size_t psi_decl_arg_get_align(struct psi_decl_arg *darg)
 156 {
 157         size_t align;
 158
 159         if (darg->var->pointer_level
 160                         && (!darg->var->array_size || darg->var->pointer_level > 2)) {
 161                 align = psi_t_alignment(PSI_T_POINTER);
 162         } else {
 163                 align = psi_decl_type_get_align(darg->type);
 164         }
 165
 166         return align;
 167 }
 168
 169 size_t psi_decl_arg_get_size(struct psi_decl_arg *darg)
 170 {
 171         size_t size;
 172         struct psi_decl_type *real = psi_decl_type_get_real(darg->type);
 173
 174         if (darg->var->array_size) {
 175                 if (darg->var->pointer_level > 2) {
 176                         size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
 177                 } else {
 178                         size = psi_t_size(real->type) * darg->var->array_size;
 179                 }
 180         } else if (darg->var->pointer_level) {
 181                 size = psi_t_size(PSI_T_POINTER);
 182         } else {
 183                 switch (real->type) {
 184                 case PSI_T_UNION:
 185                         size = real->real.unn->size;
 186                         break;
 187                 case PSI_T_STRUCT:
 188                         size = real->real.strct->size;
 189                         break;
 190                 case PSI_T_ENUM:
 191                 default:
 192                         size = psi_t_size(real->type);
 193                         break;
 194                 }
 195         }
 196
 197         return size;
 198 }
 199
 200 struct psi_decl_arg *psi_decl_arg_get_by_name(struct psi_plist *args,
 201                 const char *name)
 202 {
 203         size_t i = 0;
 204         struct psi_decl_arg *arg;
 205
 206         if (args)
 207                 while (psi_plist_get(args, i++, &arg)) {
 208                         if (!strcmp(name, arg->var->name)) {
 209                                 return arg;
 210                         }
 211                 }
 212
 213         return NULL;
 214 }
 215
 216 struct psi_decl_arg *psi_decl_arg_get_by_var(struct psi_decl_var *var,
 217                 struct psi_plist *args, struct psi_decl_arg *func)
 218 {
 219         struct psi_decl_arg *arg = psi_decl_arg_get_by_name(args, var->name);
 220
 221         if (arg) {
 222                 assert(!var->arg || var->arg == arg);
 223
 224                 return var->arg = arg;
 225         }
 226
 227         if (func && !strcmp(var->name, func->var->name)) {
 228                 return var->arg = func;
 229         }
 230
 231         return NULL;
 232 }