git.m6w6.name Git - m6w6/ext-psi/blob - src/types/let_func.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 #include <string.h>
  35 #include <assert.h>
  36
  37 #include "data.h"
  38 #include "marshal.h"
  39
  40 let_func *init_let_func(token_t type, const char *name, impl_var *var) {
  41         let_func *func = calloc(1, sizeof(*func));
  42         func->type = type;
  43         func->name = strdup(name);
  44         func->var = var;
  45         return func;
  46 }
  47
  48 void free_let_func(let_func *func) {
  49         free_impl_var(func->var);
  50         free(func->name);
  51         if (func->inner) {
  52                 free_let_vals(func->inner);
  53         }
  54         free(func);
  55 }
  56
  57 void dump_let_func(int fd, let_func *func, unsigned level) {
  58         dprintf(fd, "%s(%s", func->name, func->var->name);
  59
  60         if (func->inner) {
  61                 size_t i;
  62
  63                 dprintf(fd, ",");
  64                 for (i = 0; i < func->inner->count; ++i) {
  65                         dprintf(fd, "\n");
  66                         dump_let_val(fd, func->inner->vals[i], level+1, i+1 == func->inner->count);
  67                 }
  68                 dprintf(fd, "\n");
  69                 dprintf(fd, "%s", psi_t_indent(level));
  70         }
  71         dprintf(fd, ")");
  72 }
  73
  74 static inline int validate_let_func_type(struct psi_data *data, let_func *func, impl *impl) {
  75         switch (func->type) {
  76         case PSI_T_BOOLVAL:
  77         case PSI_T_INTVAL:
  78         case PSI_T_FLOATVAL:
  79         case PSI_T_STRVAL:
  80         case PSI_T_STRLEN:
  81         case PSI_T_PATHVAL:
  82         case PSI_T_ARRVAL:
  83         case PSI_T_OBJVAL:
  84         case PSI_T_ZVAL:
  85         case PSI_T_VOID:
  86         case PSI_T_COUNT:
  87                 return 1;
  88         default:
  89                 data->error(data, func->var->token, PSI_WARNING,
  90                                 "Unknown `let` cast function '%s' of implementation '%s'",
  91                                 func->name, impl->func->name);
  92                 return 0;
  93         }
  94 }
  95
  96 static inline int validate_let_func_inner(struct psi_data *data, let_val *val, let_func *func, decl_var *let_var, impl *impl) {
  97
  98         if (func->inner) {
  99                 size_t i;
 100                 decl_type *var_typ;
 101                 decl_args *sub_args = extract_decl_type_args(let_var->arg->type, &var_typ);
 102
 103                 if (func->type == PSI_T_ARRVAL && sub_args) {
 104                         /* struct = arrval($array,
 105                          *      member = strval($member) ...)
 106                          */
 107                         size_t i;
 108
 109                         for (i = 0; i < func->inner->count; ++i) {
 110                                 let_val *inner = func->inner->vals[i];
 111                                 const char *name = locate_let_val_varname(inner);
 112                                 let_func *fn = locate_let_val_func(inner);
 113                                 decl_arg *sub_arg;
 114
 115                                 if (name) {
 116                                         sub_arg = locate_decl_arg(sub_args, name);
 117                                 }
 118                                 if (!name || !sub_arg) {
 119                                         data->error(data, let_var->token, PSI_WARNING,
 120                                                         "Unknown variable '%s'", name);
 121                                         return 0;
 122                                 }
 123
 124                                 fn->outer = val;
 125                                 fn->ref = sub_arg;
 126
 127                                 if (!validate_let_val(data, inner, sub_arg->var, impl)) {
 128                                         return 0;
 129                                 }
 130                         }
 131                 } else if (func->type == PSI_T_ARRVAL && func->inner->count == 1 && let_var->arg->var->pointer_level) {
 132                         /* array = arrval($array,
 133                          *      strval($array)) // cast foreach entry
 134                          */
 135                         impl_var *sub_var = locate_let_val_impl_var(val);
 136                         impl_var *sub_ref = locate_let_val_impl_var(func->inner->vals[0]);
 137
 138                         if (strcmp(sub_var->name, sub_ref->name)) {
 139                                 data->error(data, sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
 140                                 return 0;
 141                         }
 142                         if (!validate_let_val(data, func->inner->vals[0], let_var, impl)) {
 143                                 return 0;
 144                         }
 145                 } else {
 146                         data->error(data, let_var->token, PSI_WARNING,
 147                                         "Inner let statement's values must refer to a structure or array type, got '%s%s' for '%s'",
 148                                         var_typ->name, psi_t_indirection(let_var->arg->var->pointer_level), let_var->name);
 149                         return 0;
 150                 }
 151         }
 152         return 1;
 153 }
 154
 155 int validate_let_func(struct psi_data *data, let_val *val, let_func *func, decl_var *let_var, impl *impl) {
 156         if (func->outer) {
 157
 158         }
 159         if (impl->func->args) {
 160                 locate_impl_var_arg(func->var, impl->func->args);
 161         }
 162         if (!func->var->arg && !func->ref) {
 163                 data->error(data, func->var->token, PSI_WARNING,
 164                                 "Unknown variable '%s%s' of `let` statement"
 165                                 " for cast '%s' of implementation '%s'",
 166                                 *func->var->name == '$' ? "" : "$",
 167                                 func->var->name, func->name, impl->func->name);
 168                 return 0;
 169         }
 170         if (!validate_let_func_type(data, func, impl)) {
 171                 return 0;
 172         }
 173         if (!validate_let_func_inner(data, val, func, let_var, impl)) {
 174                 return 0;
 175         }
 176         return 1;
 177 }