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(const char *func, struct psi_plist *vars)
  31 {
  32         struct psi_free_exp *f = calloc(1, sizeof(*f));
  33         f->func = strdup(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                 if (f->token) {
  45                         free(f->token);
  46                 }
  47                 free(f->func);
  48                 psi_plist_free(f->vars);
  49                 if (f->let) {
  50                         free(f->let);
  51                 }
  52                 free(f);
  53         }
  54 }
  55
  56 void psi_free_exp_dump(int fd, struct psi_free_exp *call)
  57 {
  58         size_t l = 0, c = psi_plist_count(call->vars);
  59         struct psi_decl_var *fvar;
  60
  61         dprintf(fd, "%s(", call->func);
  62         while (psi_plist_get(call->vars, l++, &fvar)) {
  63                 psi_decl_var_dump(fd, fvar);
  64                 if (l < c) {
  65                         dprintf(fd, ", ");
  66                 }
  67         }
  68         dprintf(fd, ")");
  69 }
  70
  71 static inline struct psi_decl *locate_free_decl(struct psi_plist *decls,
  72                 struct psi_free_exp *f)
  73 {
  74         if (decls) {
  75                 size_t i = 0;
  76                 struct psi_decl *decl;
  77
  78                 while (psi_plist_get(decls, i++, &decl)) {
  79                         if (!strcmp(decl->func->var->name, f->func)) {
  80                                 return f->decl = decl;
  81                         }
  82                 }
  83         }
  84
  85         return NULL;
  86 }
  87
  88 bool psi_free_exp_validate(struct psi_data *data, struct psi_free_exp *exp,
  89                 struct psi_impl *impl)
  90 {
  91         size_t i;
  92         struct psi_decl_var *free_var;
  93
  94         /* first find the decl of the free func */
  95         if (!locate_free_decl(data->decls, exp)) {
  96                 data->error(data, exp->token, PSI_WARNING,
  97                                 "Missing declaration '%s' in `free` statement"
  98                                 " of implementation '%s'", exp->func, impl->func->name);
  99                 return false;
 100         }
 101
 102         /* now check for known vars */
 103         exp->let = calloc(psi_plist_count(exp->vars), sizeof(*exp->let));
 104         for (i = 0; psi_plist_get(exp->vars, i, &free_var); ++i) {
 105                 if (!psi_decl_arg_get_by_var(free_var, impl->decl->args,
 106                                 impl->decl->func)) {
 107                         data->error(data, free_var->token, PSI_WARNING,
 108                                         "Unknown variable '%s' of `free` statement"
 109                                         " of implementation '%s'",
 110                                         free_var->name, impl->func->name);
 111                         return false;
 112                 }
 113
 114                 exp->let[i] = psi_impl_get_let(impl, free_var);
 115                 assert(exp->let[i]);
 116         }
 117
 118         return true;
 119 }
 120
 121 void psi_free_exp_exec(struct psi_free_exp *f, struct psi_call_frame *frame)
 122 {
 123         size_t i;
 124         void **args;
 125         struct psi_decl_var *dvar;
 126         struct psi_call_frame *free_call;
 127
 128         free_call = psi_call_frame_init(frame->context, f->decl, NULL);
 129         psi_call_frame_enter(free_call);
 130
 131         args = psi_call_frame_get_arg_pointers(free_call);
 132         for (i = 0; psi_plist_get(f->vars, i, &dvar); ++i) {
 133                 struct psi_call_frame_symbol *frame_sym;
 134                 struct psi_let_exp *let = f->let[i]->exp;
 135
 136                 frame_sym = psi_call_frame_fetch_symbol(frame, let->var);
 137                 args[i] = deref_impl_val(frame_sym->ptr, dvar);
 138         }
 139
 140         psi_call_frame_do_call(free_call);
 141         psi_call_frame_free(free_call);
 142 }