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 #include "php_psi_stdinc.h"
  27 #include "data.h"
  28 #include "call.h"
  29
  30 struct psi_free_exp *psi_free_exp_init(zend_string *func, struct psi_plist *vars)
  31 {
  32         struct psi_free_exp *f = pecalloc(1, sizeof(*f), 1);
  33         f->func = zend_string_copy(func);
  34         f->vars = vars;
  35         return f;
  36 }
  37
  38 void psi_free_exp_free(struct psi_free_exp **f_ptr)
  39 {
  40         if (*f_ptr) {
  41                 struct psi_free_exp *f = *f_ptr;
  42
  43                 *f_ptr = NULL;
  44                 psi_token_free(&f->token);
  45                 zend_string_release(f->func);
  46                 psi_plist_free(f->vars);
  47                 if (f->let) {
  48                         free(f->let);
  49                 }
  50                 free(f);
  51         }
  52 }
  53
  54 void psi_free_exp_dump(struct psi_dump *dump, struct psi_free_exp *call)
  55 {
  56         size_t l = 0, c = psi_plist_count(call->vars);
  57         struct psi_decl_var *fvar;
  58
  59         PSI_DUMP(dump, "%s(", call->func->val);
  60         while (psi_plist_get(call->vars, l++, &fvar)) {
  61                 psi_decl_var_dump(dump, fvar);
  62                 if (l < c) {
  63                         PSI_DUMP(dump, ", ");
  64                 }
  65         }
  66         PSI_DUMP(dump, ")");
  67 }
  68
  69 static inline struct psi_decl *locate_free_decl(struct psi_plist *decls,
  70                 struct psi_free_exp *f)
  71 {
  72         if (decls) {
  73                 size_t i = 0;
  74                 struct psi_decl *decl;
  75
  76                 while (psi_plist_get(decls, i++, &decl)) {
  77                         if (zend_string_equals(decl->func->var->name, f->func)) {
  78                                 return f->decl = decl;
  79                         }
  80                 }
  81         }
  82
  83         return NULL;
  84 }
  85
  86 bool psi_free_exp_validate(struct psi_data *data, struct psi_free_exp *exp,
  87                 struct psi_validate_scope *scope)
  88 {
  89         size_t i;
  90         struct psi_decl_var *free_var;
  91
  92         /* first find the decl of the free func */
  93         if (!locate_free_decl(data->decls, exp)) {
  94                 data->error(data, exp->token, PSI_WARNING,
  95                                 "Missing declaration '%s' in `free` statement"
  96                                 " of implementation '%s'", exp->func->val,
  97                                 scope->impl->func->name->val);
  98                 return false;
  99         }
 100
 101         /* now check for known vars */
 102         exp->let = pecalloc(psi_plist_count(exp->vars), sizeof(*exp->let), 1);
 103         for (i = 0; psi_plist_get(exp->vars, i, &free_var); ++i) {
 104                 if (!psi_impl_get_decl_arg(scope->impl, free_var)) {
 105                         data->error(data, free_var->token, PSI_WARNING,
 106                                         "Unknown variable '%s' of `free` statement"
 107                                         " of implementation '%s'",
 108                                         free_var->name->val, scope->impl->func->name->val);
 109                         return false;
 110                 }
 111
 112                 exp->let[i] = psi_impl_get_let(scope->impl, free_var);
 113                 assert(exp->let[i]);
 114         }
 115
 116         return true;
 117 }
 118
 119 void psi_free_exp_exec(struct psi_free_exp *f, struct psi_call_frame *frame)
 120 {
 121         size_t i;
 122         void **args;
 123         struct psi_decl_var *dvar;
 124         struct psi_call_frame *free_call;
 125         struct psi_context *ctx = psi_call_frame_get_context(frame);
 126
 127         free_call = psi_call_frame_init(ctx, f->decl, NULL);
 128         psi_call_frame_enter(free_call);
 129
 130         args = psi_call_frame_get_arg_pointers(free_call);
 131         for (i = 0; psi_plist_get(f->vars, i, &dvar); ++i) {
 132                 struct psi_call_frame_symbol *frame_sym;
 133                 struct psi_let_exp *let = f->let[i]->exp;
 134
 135                 frame_sym = psi_call_frame_fetch_symbol(frame, let->var);
 136                 args[i] = deref_impl_val(frame_sym->ptr, dvar);
 137         }
 138
 139         psi_call_frame_do_call(free_call);
 140         psi_call_frame_free(free_call);
 141 }