git.m6w6.name Git - m6w6/ext-psi/blob - src/types/free_exp.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 #include "data.h"
  32 #include "call.h"
  33
  34 struct psi_free_exp *psi_free_exp_init(zend_string *func, struct psi_plist *vars)
  35 {
  36         struct psi_free_exp *f = pecalloc(1, sizeof(*f), 1);
  37         f->func = zend_string_copy(func);
  38         f->vars = vars;
  39         return f;
  40 }
  41
  42 void psi_free_exp_free(struct psi_free_exp **f_ptr)
  43 {
  44         if (*f_ptr) {
  45                 struct psi_free_exp *f = *f_ptr;
  46
  47                 *f_ptr = NULL;
  48                 psi_token_free(&f->token);
  49                 zend_string_release(f->func);
  50                 psi_plist_free(f->vars);
  51                 if (f->let) {
  52                         free(f->let);
  53                 }
  54                 free(f);
  55         }
  56 }
  57
  58 void psi_free_exp_dump(struct psi_dump *dump, struct psi_free_exp *call)
  59 {
  60         size_t l = 0, c = psi_plist_count(call->vars);
  61         struct psi_decl_var *fvar;
  62
  63         PSI_DUMP(dump, "%s(", call->func->val);
  64         while (psi_plist_get(call->vars, l++, &fvar)) {
  65                 psi_decl_var_dump(dump, fvar);
  66                 if (l < c) {
  67                         PSI_DUMP(dump, ", ");
  68                 }
  69         }
  70         PSI_DUMP(dump, ")");
  71 }
  72
  73 static inline struct psi_decl *locate_free_decl(struct psi_plist *decls,
  74                 struct psi_free_exp *f)
  75 {
  76         if (decls) {
  77                 size_t i = 0;
  78                 struct psi_decl *decl;
  79
  80                 while (psi_plist_get(decls, i++, &decl)) {
  81                         if (zend_string_equals(decl->func->var->name, f->func)) {
  82                                 return f->decl = decl;
  83                         }
  84                 }
  85         }
  86
  87         return NULL;
  88 }
  89
  90 bool psi_free_exp_validate(struct psi_data *data, struct psi_free_exp *exp,
  91                 struct psi_validate_scope *scope)
  92 {
  93         size_t i;
  94         struct psi_decl_var *free_var;
  95
  96         /* first find the decl of the free func */
  97         if (!locate_free_decl(data->decls, exp)) {
  98                 data->error(data, exp->token, PSI_WARNING,
  99                                 "Missing declaration '%s' in `free` statement"
 100                                 " of implementation '%s'", exp->func->val,
 101                                 scope->impl->func->name->val);
 102                 return false;
 103         }
 104
 105         /* now check for known vars */
 106         exp->let = pecalloc(psi_plist_count(exp->vars), sizeof(*exp->let), 1);
 107         for (i = 0; psi_plist_get(exp->vars, i, &free_var); ++i) {
 108                 if (!psi_impl_get_decl_arg(scope->impl, free_var)) {
 109                         data->error(data, free_var->token, PSI_WARNING,
 110                                         "Unknown variable '%s' of `free` statement"
 111                                         " of implementation '%s'",
 112                                         free_var->name->val, scope->impl->func->name->val);
 113                         return false;
 114                 }
 115
 116                 exp->let[i] = psi_impl_get_let(scope->impl, free_var);
 117                 assert(exp->let[i]);
 118         }
 119
 120         return true;
 121 }
 122
 123 void psi_free_exp_exec(struct psi_free_exp *f, struct psi_call_frame *frame)
 124 {
 125         size_t i;
 126         void **args;
 127         struct psi_decl_var *dvar;
 128         struct psi_call_frame *free_call;
 129         struct psi_context *ctx = psi_call_frame_get_context(frame);
 130
 131         free_call = psi_call_frame_init(ctx, f->decl, NULL);
 132         psi_call_frame_enter(free_call);
 133
 134         args = psi_call_frame_get_arg_pointers(free_call);
 135         for (i = 0; psi_plist_get(f->vars, i, &dvar); ++i) {
 136                 struct psi_call_frame_symbol *frame_sym;
 137                 struct psi_let_exp *let = f->let[i]->exp;
 138
 139                 frame_sym = psi_call_frame_fetch_symbol(frame, let->var);
 140                 args[i] = deref_impl_val(frame_sym->ptr, dvar);
 141         }
 142
 143         psi_call_frame_do_call(free_call);
 144         psi_call_frame_free(free_call);
 145 }