libcc1/marshall.cc

   1 /* Marshalling and unmarshalling.
   2    Copyright (C) 2014-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include <cc1plugin-config.h>
  21 #include <new>
  22 #include <string.h>
  23 #include "marshall.hh"
  24 #include "connection.hh"
  25
  26 cc1_plugin::status
  27 cc1_plugin::unmarshall_check (connection *conn, unsigned long long check)
  28 {
  29   unsigned long long r;
  30
  31   if (!unmarshall (conn, &r))
  32     return FAIL;
  33   return check == r ? OK : FAIL;
  34 }
  35
  36 cc1_plugin::status
  37 cc1_plugin::marshall_intlike (connection *conn, unsigned long long val)
  38 {
  39   if (!conn->send ('i'))
  40     return FAIL;
  41   return conn->send (&val, sizeof (val));
  42 }
  43
  44 cc1_plugin::status
  45 cc1_plugin::unmarshall_intlike (connection *conn, unsigned long long *result)
  46 {
  47   if (!conn->require ('i'))
  48     return FAIL;
  49   return conn->get (result, sizeof (*result));
  50 }
  51
  52 cc1_plugin::status
  53 cc1_plugin::unmarshall (connection *conn, enum gcc_c_symbol_kind *result)
  54 {
  55   protocol_int p;
  56   if (!unmarshall_intlike (conn, &p))
  57     return FAIL;
  58   *result = (enum gcc_c_symbol_kind) p;
  59   return OK;
  60 }
  61
  62 cc1_plugin::status
  63 cc1_plugin::unmarshall (connection *conn, enum gcc_c_oracle_request *result)
  64 {
  65   protocol_int p;
  66   if (!unmarshall_intlike (conn, &p))
  67     return FAIL;
  68   *result = (enum gcc_c_oracle_request) p;
  69   return OK;
  70 }
  71
  72 cc1_plugin::status
  73 cc1_plugin::unmarshall (connection *conn, enum gcc_qualifiers *result)
  74 {
  75   protocol_int p;
  76   if (!unmarshall_intlike (conn, &p))
  77     return FAIL;
  78   *result = (enum gcc_qualifiers) p;
  79   return OK;
  80 }
  81
  82 cc1_plugin::status
  83 cc1_plugin::marshall (connection *conn, const char *str)
  84 {
  85   if (!conn->send ('s'))
  86     return FAIL;
  87
  88   unsigned long long len = str == NULL ? -1ULL : strlen (str);
  89   if (!conn->send (&len, sizeof (len)))
  90     return FAIL;
  91
  92   if (str == NULL)
  93     return OK;
  94
  95   return conn->send (str, len);
  96 }
  97
  98 cc1_plugin::status
  99 cc1_plugin::unmarshall (connection *conn, char **result)
 100 {
 101   unsigned long long len;
 102
 103   if (!conn->require ('s'))
 104     return FAIL;
 105   if (!conn->get (&len, sizeof (len)))
 106     return FAIL;
 107
 108   if (len == -1ULL)
 109     {
 110       *result = NULL;
 111       return OK;
 112     }
 113
 114   char *str = new (std::nothrow) char[len + 1];
 115   if (str == NULL)
 116     return FAIL;
 117
 118   if (!conn->get (str, len))
 119     {
 120       delete[] str;
 121       return FAIL;
 122     }
 123
 124   str[len] = '\0';
 125   *result = str;
 126
 127   return OK;
 128 }
 129
 130 cc1_plugin::status
 131 cc1_plugin::marshall (connection *conn, const gcc_type_array *a)
 132 {
 133   if (!conn->send ('a'))
 134     return FAIL;
 135
 136   unsigned long long r = a->n_elements;
 137   if (!conn->send (&r, sizeof (r)))
 138     return FAIL;
 139
 140   return conn->send (a->elements, r * sizeof (a->elements[0]));
 141 }
 142
 143 cc1_plugin::status
 144 cc1_plugin::unmarshall (connection *conn, gcc_type_array **result)
 145 {
 146   unsigned long long len;
 147
 148   if (!conn->require ('a'))
 149     return FAIL;
 150   if (!conn->get (&len, sizeof (len)))
 151     return FAIL;
 152
 153   *result = new gcc_type_array;
 154
 155   (*result)->n_elements = len;
 156   (*result)->elements = new gcc_type[len];
 157
 158   if (!conn->get ((*result)->elements, len * sizeof ((*result)->elements[0])))
 159     {
 160       delete[] (*result)->elements;
 161       delete *result;
 162       return FAIL;
 163     }
 164
 165   return OK;
 166 }