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 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #else
  29 # include "php_config.h"
  30 #endif
  31
  32 #include <stdlib.h>
  33 #include <stdio.h>
  34 #include <assert.h>
  35
  36 #include "data.h"
  37
  38 decl_arg *init_decl_arg(decl_type *type, decl_var *var) {
  39         decl_arg *arg = calloc(1, sizeof(*arg));
  40         arg->token = var->token;
  41         arg->type = type;
  42         arg->var = var;
  43         var->arg = arg;
  44         arg->ptr = &arg->val;
  45         arg->let = arg->ptr;
  46         return arg;
  47 }
  48
  49 void free_decl_arg(decl_arg *arg) {
  50         if (arg->token && arg->token != arg->var->token) {
  51                 free(arg->token);
  52         }
  53         free_decl_type(arg->type);
  54         free_decl_var(arg->var);
  55         if (arg->layout) {
  56                 free_decl_struct_layout(arg->layout);
  57         }
  58         free(arg);
  59 }
  60
  61 void dump_decl_arg(int fd, decl_arg *arg, unsigned level) {
  62         if (arg->type->type == PSI_T_FUNCTION) {
  63                 dump_decl_type(fd, arg->type->real.func->func->type, level);
  64                 dprintf(fd, " (*");
  65                 dump_decl_var(fd, arg->var);
  66                 dprintf(fd, ")(");
  67                 if (arg->type->real.func->args) {
  68                         size_t j;
  69
  70                         for (j = 0; j < arg->type->real.func->args->count; ++j) {
  71                                 if (j) {
  72                                         dprintf(fd, ", ");
  73                                 }
  74                                 dump_decl_arg(fd, arg->type->real.func->args->args[j], level+1);
  75                         }
  76                         if (arg->type->real.func->args->varargs) {
  77                                 dprintf(fd, ", ...");
  78                         }
  79                 }
  80                 dprintf(fd, ")");
  81         } else {
  82                 dump_decl_type(fd, arg->type, level);
  83                 dprintf(fd, " ");
  84                 dump_decl_var(fd, arg->var);
  85         }
  86 }
  87
  88 int validate_decl_arg(struct psi_data *data, decl_arg *arg) {
  89         if (!validate_decl_type(data, arg->type, NULL)) {
  90                 data->error(data, arg->type->token, PSI_WARNING,
  91                         "Cannot use '%s' as type for '%s'",
  92                         arg->type->name, arg->var->name);
  93                 return 0;
  94         }
  95         return 1;
  96 }
  97
  98 size_t align_decl_arg(decl_arg *darg, size_t *pos, size_t *len) {
  99         size_t align = alignof_decl_arg(darg);
 100
 101         assert(align > 0);
 102
 103         *len = sizeof_decl_arg(darg);
 104         *pos = psi_align(align, *pos);
 105
 106         return align;
 107 }
 108
 109 size_t alignof_decl_arg(decl_arg *darg) {
 110         size_t align;
 111
 112         if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level > 2)) {
 113                 align = psi_t_alignment(PSI_T_POINTER);
 114         } else {
 115                 align = alignof_decl_type(darg->type);
 116         }
 117
 118         return align;
 119 }
 120
 121 size_t sizeof_decl_arg(decl_arg *darg) {
 122         size_t size;
 123         decl_type *real = real_decl_type(darg->type);
 124
 125         if (darg->var->array_size) {
 126                 if (darg->var->pointer_level > 2) {
 127                         size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
 128                 } else {
 129                         size = psi_t_size(real->type) * darg->var->array_size;
 130                 }
 131         } else if (darg->var->pointer_level) {
 132                 size = psi_t_size(PSI_T_POINTER);
 133         } else {
 134                 switch (real->type) {
 135                 case PSI_T_UNION:
 136                         size = real->real.unn->size;
 137                         break;
 138                 case PSI_T_STRUCT:
 139                         size = real->real.strct->size;
 140                         break;
 141                 case PSI_T_ENUM:
 142                 default:
 143                         size = psi_t_size(real->type);
 144                         break;
 145                 }
 146         }
 147
 148         assert(size > 0);
 149
 150         return size;
 151 }