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

   1 /*******************************************************************************
   2  Copyright (c) 2017, 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 "data.h"
  28 #include "call.h"
  29
  30 struct psi_return_exp *psi_return_exp_init(struct psi_decl_var *func,
  31                 struct psi_plist *args, struct psi_set_exp *set)
  32 {
  33         struct psi_return_exp *exp = pecalloc(1, sizeof(*exp), 1);
  34
  35         exp->func = func;
  36         exp->args = args;
  37         exp->set = set;
  38
  39         return exp;
  40 }
  41
  42 void psi_return_exp_free(struct psi_return_exp **exp_ptr)
  43 {
  44         if (*exp_ptr) {
  45                 struct psi_return_exp *exp = *exp_ptr;
  46
  47                 *exp_ptr = NULL;
  48                 psi_token_free(&exp->token);
  49                 if (exp->func) {
  50                         psi_decl_var_free(&exp->func);
  51                 }
  52                 if (exp->args) {
  53                         psi_plist_free(exp->args);
  54                         exp->args = NULL;
  55                 }
  56                 if (exp->set) {
  57                         psi_set_exp_free(&exp->set);
  58                 }
  59                 free(exp);
  60         }
  61 }
  62
  63 void psi_return_exp_dump(struct psi_dump *dump, struct psi_return_exp *exp)
  64 {
  65         if (exp->func) {
  66                 psi_decl_var_dump(dump, exp->func);
  67                 PSI_DUMP(dump, "(");
  68                 if (exp->args) {
  69                         size_t i = 0;
  70                         struct psi_decl_var *arg;
  71
  72                         while (psi_plist_get(exp->args, i++, &arg)) {
  73                                 if (i > 1) {
  74                                         PSI_DUMP(dump, ", ");
  75                                 }
  76                                 psi_decl_var_dump(dump, arg);
  77                         }
  78                 }
  79                 PSI_DUMP(dump, ")");
  80         }
  81         if (exp->set) {
  82                 if (exp->func) {
  83                         PSI_DUMP(dump, " as ");
  84                 }
  85
  86                 psi_set_exp_dump(dump, exp->set, 1, 1);
  87         }
  88 }
  89
  90 void psi_return_exp_exec(struct psi_return_exp *exp, zval *return_value,
  91                 struct psi_call_frame *frame)
  92 {
  93         if (exp->set) {
  94                 void *rpointer = psi_call_frame_get_rpointer(frame);
  95
  96                 psi_set_exp_exec_ex(exp->set, return_value, rpointer, frame);
  97         }
  98 }
  99
 100 static inline bool psi_return_exp_validate_decl_args(struct psi_data *data,
 101                 struct psi_return_exp *exp, struct psi_impl *impl)
 102 {
 103         size_t i;
 104         struct psi_decl_var *call_arg;
 105
 106         if (exp->args) {
 107                 if (psi_plist_count(exp->args) != psi_plist_count(impl->decl->args)) {
 108                         data->error(data, exp->token, PSI_WARNING,
 109                                         "Argument count of return statement of implementation '%s' "
 110                                         "does not match argument count of declaration '%s'",
 111                                         impl->func->name->val, impl->decl->func->var->name->val);
 112                         return false;
 113                 }
 114
 115                 for (i = 0; psi_plist_get(exp->args, i, &call_arg); ++i) {
 116                         psi_plist_get(impl->decl->args, i, &call_arg->arg);
 117                 }
 118         }
 119         return true;
 120 }
 121
 122 bool psi_return_exp_validate(struct psi_data *data, struct psi_return_exp *exp,
 123                 struct psi_validate_scope *scope)
 124 {
 125         size_t i = 0;
 126         struct psi_decl *decl;
 127         zend_string *name = psi_return_exp_get_decl_name(exp);
 128
 129
 130         while (psi_plist_get(data->decls, i++, &decl)) {
 131                 if (zend_string_equals(decl->func->var->name, name)) {
 132                         scope->impl->decl = decl;
 133                         if (psi_return_exp_validate_decl_args(data, exp, scope->impl)) {
 134                                 scope->current_set = exp->set;
 135                                 if (psi_set_exp_validate(data, exp->set, scope)) {
 136                                         scope->current_set = NULL;
 137                                         return true;
 138                                 }
 139                                 scope->current_set = NULL;
 140                         }
 141                         return false;
 142                 }
 143         }
 144
 145         data->error(data, exp->token, PSI_WARNING,
 146                         "Missing declaration '%s' for `return` statement of implementation %s",
 147                         name->val, scope->impl->func->name->val);
 148         return false;
 149 }
 150
 151 zend_string *psi_return_exp_get_decl_name(struct psi_return_exp *exp)
 152 {
 153         return exp->func ? exp->func->name : exp->set->data.func->var->name;
 154 }
 155