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 = calloc(1, sizeof(*exp));
  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                 if (exp->token) {
  49                         psi_token_free(&exp->token);
  50                 }
  51                 if (exp->func) {
  52                         psi_decl_var_free(&exp->func);
  53                 }
  54                 if (exp->args) {
  55                         psi_plist_free(exp->args);
  56                         exp->args = NULL;
  57                 }
  58                 if (exp->set) {
  59                         psi_set_exp_free(&exp->set);
  60                 }
  61                 free(exp);
  62         }
  63 }
  64
  65 void psi_return_exp_dump(int fd, struct psi_return_exp *exp)
  66 {
  67         if (exp->func) {
  68                 psi_decl_var_dump(fd, exp->func);
  69                 dprintf(fd, "(");
  70                 if (exp->args) {
  71                         size_t i = 0;
  72                         struct psi_decl_var *arg;
  73
  74                         while (psi_plist_get(exp->args, i++, &arg)) {
  75                                 if (i > 1) {
  76                                         dprintf(fd, ", ");
  77                                 }
  78                                 psi_decl_var_dump(fd, arg);
  79                         }
  80                 }
  81                 dprintf(fd, ")");
  82         }
  83         if (exp->set) {
  84                 if (exp->func) {
  85                         dprintf(fd, " as ");
  86                 }
  87
  88                 psi_set_exp_dump(fd, exp->set, 1, 1);
  89         }
  90 }
  91
  92 void psi_return_exp_exec(struct psi_return_exp *exp, zval *return_value,
  93                 struct psi_call_frame *frame)
  94 {
  95         if (exp->set) {
  96                 void *rpointer = psi_call_frame_get_rpointer(frame);
  97
  98                 psi_set_exp_exec_ex(exp->set, return_value, rpointer, frame);
  99         }
 100 }
 101
 102 static inline bool psi_return_exp_validate_decl_args(struct psi_data *data,
 103                 struct psi_return_exp *exp, struct psi_impl *impl)
 104 {
 105         size_t i;
 106         struct psi_decl_var *call_arg;
 107
 108         if (exp->args) {
 109                 if (psi_plist_count(exp->args) != psi_plist_count(impl->decl->args)) {
 110                         data->error(data, exp->token, PSI_WARNING,
 111                                         "Argument count of return statement of implementation '%s'"
 112                                         "does not match argument count of declaration '%s'",
 113                                         impl->func->name, impl->decl->func->var->name);
 114                         return false;
 115                 }
 116
 117                 for (i = 0; psi_plist_get(exp->args, i, &call_arg); ++i) {
 118                         psi_plist_get(impl->decl->args, i, &call_arg->arg);
 119                 }
 120         }
 121         return true;
 122 }
 123
 124 bool psi_return_exp_validate(struct psi_data *data, struct psi_return_exp *exp,
 125                 struct psi_validate_scope *scope)
 126 {
 127         size_t i = 0;
 128         struct psi_decl *decl;
 129         const char *name = psi_return_exp_get_decl_name(exp);
 130
 131
 132
 133         while (psi_plist_get(data->decls, i++, &decl)) {
 134                 if (!strcmp(decl->func->var->name, name)) {
 135                         scope->impl->decl = decl;
 136                         if (psi_return_exp_validate_decl_args(data, exp, scope->impl)) {
 137                                 scope->current_set = exp->set;
 138                                 if (psi_set_exp_validate(data, exp->set, scope)) {
 139                                         scope->current_set = NULL;
 140                                         return true;
 141                                 }
 142                                 scope->current_set = NULL;
 143                         }
 144                         return false;
 145                 }
 146         }
 147
 148         data->error(data, exp->token, PSI_WARNING,
 149                         "Missing declaration '%s' for `return` statement of implementation %s",
 150                         name, scope->impl->func->name);
 151         return false;
 152 }
 153
 154 const char *psi_return_exp_get_decl_name(struct psi_return_exp *exp)
 155 {
 156         return exp->func ? exp->func->name : exp->set->data.func->var->name;
 157 }
 158