git.m6w6.name Git - m6w6/ext-psi/blob - src/types/let_stmt.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 "data.h"
  28
  29 struct psi_let_stmt *psi_let_stmt_init(struct psi_let_exp *exp)
  30 {
  31         struct psi_let_stmt *let = pecalloc(1, sizeof(*let), 1);
  32         let->exp = exp;
  33
  34         return let;
  35 }
  36
  37 void psi_let_stmt_free(struct psi_let_stmt **stmt_ptr)
  38 {
  39         if (*stmt_ptr) {
  40                 struct psi_let_stmt *stmt = *stmt_ptr;
  41
  42                 *stmt_ptr = NULL;
  43                 if (stmt->exp) {
  44                         psi_let_exp_free(&stmt->exp);
  45                 }
  46                 psi_token_free(&stmt->token);
  47                 free(stmt);
  48         }
  49 }
  50
  51 void psi_let_stmt_dump(struct psi_dump *dump, struct psi_let_stmt *let)
  52 {
  53         PSI_DUMP(dump, "\t%s ", let->exp->kind == PSI_LET_TMP ? "temp" : "let");
  54         psi_let_exp_dump(dump, let->exp, 1, 1);
  55         PSI_DUMP(dump, "\n");
  56 }
  57
  58 bool psi_let_stmts_validate(struct psi_data *data, struct psi_validate_scope *scope)
  59 {
  60         size_t i = 0;
  61         struct psi_let_stmt *let;
  62
  63         /* we can have multiple let stmts */
  64         /* check that we have a decl arg and impl arg for every let stmt */
  65         while (psi_plist_get(scope->impl->stmts.let, i++, &let)) {
  66                 struct psi_decl_var *let_var;
  67                 struct psi_impl_var *let_ivar = NULL;
  68
  69                 if (let->exp->kind == PSI_LET_TMP) {
  70                         let_var = let->exp->data.var;
  71                 } else {
  72                         let_var = let->exp->var;
  73                 }
  74
  75                 if (!let->exp->var) {
  76                         data->error(data, let->token, PSI_WARNING,
  77                                         "Missing variable in `let` statement for implementation %s",
  78                                         scope->impl->func->name->val);
  79                         return false;
  80                 }
  81
  82                 if (!psi_impl_get_decl_arg(scope->impl, let_var)) {
  83                         data->error(data, let_var->token, PSI_WARNING,
  84                                         "Unknown variable '%s' in `let` statement  of implementation '%s'",
  85                                         let_var->name->val, scope->impl->func->name->val);
  86                         return false;
  87                 }
  88                 switch (let->exp->kind) {
  89                 case PSI_LET_CALLBACK:
  90                         let_ivar = let->exp->data.callback->func->var;
  91                         break;
  92                 case PSI_LET_FUNC:
  93                         let_ivar = let->exp->data.func->var;
  94                         break;
  95                 default:
  96                         break;
  97                 }
  98                 if (let_ivar && !psi_impl_get_arg(scope->impl, let_ivar)) {
  99                         data->error(data, let_var->token, PSI_WARNING,
 100                                         "Unknown variable '%s' in `let` statement of implementation '%s'",
 101                                         let_ivar->name->val, scope->impl->func->name->val);
 102                         return false;
 103                 }
 104
 105                 scope->current_let = let->exp;
 106                 if (!psi_let_exp_validate(data, let->exp, scope)) {
 107                         scope->current_let = NULL;
 108                         return false;
 109                 }
 110                 scope->current_let = NULL;
 111         }
 112         /* check that we have a let stmt for every decl arg */
 113         if (scope->impl->decl->args) {
 114                 struct psi_decl_arg *darg;
 115
 116                 for (i = 0; psi_plist_get(scope->impl->decl->args, i, &darg); ++i) {
 117                         if (!psi_impl_get_let(scope->impl, darg->var)) {
 118                                 data->error(data, scope->impl->func->token, PSI_WARNING,
 119                                                 "Missing `let` statement for arg '%s %s%s'"
 120                                                                 " of declaration '%s' for implementation '%s'",
 121                                                 darg->type->name->val,
 122                                                 psi_t_indirection(darg->var->pointer_level),
 123                                                 darg->var->name->val,
 124                                                 scope->impl->decl->func->var->name->val,
 125                                                 scope->impl->func->name->val);
 126                                 return false;
 127                         }
 128                 }
 129         }
 130
 131         return true;
 132 }
 133
 134 void *psi_let_stmt_exec(struct psi_let_stmt *let, struct psi_call_frame *frame)
 135 {
 136         return psi_let_exp_exec(let->exp, let->exp->var->arg, NULL, 0, frame);
 137 }