git.m6w6.name Git - m6w6/ext-psi/blob - src/types/free_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 #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
  35 #include "data.h"
  36
  37 free_stmt *init_free_stmt(free_calls *calls) {
  38         free_stmt *f = calloc(1, sizeof(*f));
  39         f->calls = calls;
  40         return f;
  41 }
  42
  43 void free_free_stmt(free_stmt *f) {
  44         free_free_calls(f->calls);
  45         free(f);
  46 }
  47
  48 void dump_free_stmt(int fd, free_stmt *fre) {
  49         size_t k;
  50
  51         dprintf(fd, "\tfree ");
  52         for (k = 0; k < fre->calls->count; ++k) {
  53                 free_call *call = fre->calls->list[k];
  54
  55                 if (k) {
  56                         dprintf(fd, ", ");
  57                 }
  58                 dump_free_call(fd, call);
  59                 dprintf(fd, "\n");
  60         }
  61 }
  62
  63 static inline decl *locate_free_decl(decls *decls, free_call *f) {
  64         if (decls)  {
  65                 size_t i;
  66
  67                 for (i = 0; i < decls->count; ++i) {
  68                         if (!strcmp(decls->list[i]->func->var->name, f->func)) {
  69                                 f->decl = decls->list[i];
  70                                 return decls->list[i];
  71                         }
  72                 }
  73         }
  74
  75         return NULL;
  76 }
  77
  78 int validate_free_stmts(struct psi_data *data, impl *impl) {
  79         size_t i, j, k, l;
  80         /* we can have any count of free stmts; freeing any out vars */
  81         for (i = 0; i < impl->stmts->fre.count; ++i) {
  82                 free_stmt *fre = impl->stmts->fre.list[i];
  83
  84                 for (j = 0; j < fre->calls->count; ++j) {
  85                         free_call *free_call = fre->calls->list[j];
  86
  87                         /* first find the decl of the free func */
  88                         if (!locate_free_decl(data->decls, free_call)) {
  89                                 data->error(data, free_call->token, PSI_WARNING,
  90                                                 "Missing declaration '%s' in `free` statement"
  91                                                 " of implementation '%s'",
  92                                                 free_call->func, impl->func->name);
  93                                 return 0;
  94                         }
  95
  96
  97
  98                         /* now check for known vars */
  99                         for (l = 0; l < free_call->vars->count; ++l) {
 100                                 int check = 0;
 101                                 decl_var *free_var = free_call->vars->vars[l];
 102
 103                                 if (!strcmp(free_var->name, impl->decl->func->var->name)) {
 104                                         check = 1;
 105                                         free_var->arg = impl->decl->func;
 106                                 } else if (impl->decl->args) {
 107                                         for (k = 0; k < impl->decl->args->count; ++k) {
 108                                                 decl_arg *free_arg = impl->decl->args->args[k];
 109
 110                                                 if (!strcmp(free_var->name, free_arg->var->name)) {
 111                                                         check = 1;
 112                                                         free_var->arg = free_arg;
 113                                                         break;
 114                                                 }
 115                                         }
 116                                 }
 117
 118                                 if (!check) {
 119                                         data->error(data, free_var->token, PSI_WARNING,
 120                                                         "Unknown variable '%s' of `free` statement"
 121                                                         " of implementation '%s'",
 122                                                         free_var->name, impl->func->name);
 123                                         return 0;
 124                                 }
 125                         }
 126                 }
 127         }
 128         return 1;
 129 }