gcc/m2/mc-boot/GEnvironment.cc

   1 /* do not edit automatically generated by mc from Environment.  */
   2 /* Environment.mod provides access to the environment settings of a process.
   3
   4 Copyright (C) 2001-2025 Free Software Foundation, Inc.
   5 Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
   6
   7 This file is part of GNU Modula-2.
   8
   9 GNU Modula-2 is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GNU Modula-2 is distributed in the hope that it will be useful, but
  15 WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #include "config.h"
  29 #include "system.h"
  30 #include <stdbool.h>
  31 #   if !defined (PROC_D)
  32 #      define PROC_D
  33        typedef void (*PROC_t) (void);
  34        typedef struct { PROC_t proc; } PROC;
  35 #   endif
  36
  37 #if defined(__cplusplus)
  38 #   undef NULL
  39 #   define NULL 0
  40 #endif
  41 #define _Environment_C
  42
  43 #include "GEnvironment.h"
  44 #   include "GSYSTEM.h"
  45 #   include "Glibc.h"
  46 #   include "GASCII.h"
  47 #   include "GStrLib.h"
  48
  49
  50 /*
  51    GetEnvironment - gets the environment variable Env and places
  52                     a copy of its value into string, dest.
  53                     It returns TRUE if the string Env was found in
  54                     the processes environment.
  55 */
  56
  57 extern "C" bool Environment_GetEnvironment (const char *Env_, unsigned int _Env_high, char *dest, unsigned int _dest_high);
  58
  59 /*
  60    PutEnvironment - change or add an environment variable definition EnvDef.
  61                     TRUE is returned if the environment variable was
  62                     set or changed successfully.
  63 */
  64
  65 extern "C" bool Environment_PutEnvironment (const char *EnvDef_, unsigned int _EnvDef_high);
  66
  67
  68 /*
  69    GetEnvironment - gets the environment variable Env and places
  70                     a copy of its value into string, dest.
  71                     It returns TRUE if the string Env was found in
  72                     the processes environment.
  73 */
  74
  75 extern "C" bool Environment_GetEnvironment (const char *Env_, unsigned int _Env_high, char *dest, unsigned int _dest_high)
  76 {
  77   typedef char *GetEnvironment__T1;
  78
  79   unsigned int High;
  80   unsigned int i;
  81   GetEnvironment__T1 Addr;
  82   char Env[_Env_high+1];
  83
  84   /* make a local copy of each unbounded array.  */
  85   memcpy (Env, Env_, _Env_high+1);
  86
  87   i = 0;
  88   High = _dest_high;
  89   Addr = static_cast<GetEnvironment__T1> (libc_getenv (const_cast<void*> (static_cast<const void*>(Env))));
  90   while (((i < High) && (Addr != NULL)) && ((*Addr) != ASCII_nul))
  91     {
  92       const_cast<char *>(dest)[i] = (*Addr);
  93       Addr += 1;
  94       i += 1;
  95     }
  96   if (i < High)
  97     {
  98       const_cast<char *>(dest)[i] = ASCII_nul;
  99     }
 100   return Addr != NULL;
 101   /* static analysis guarentees a RETURN statement will be used before here.  */
 102   __builtin_unreachable ();
 103 }
 104
 105
 106 /*
 107    PutEnvironment - change or add an environment variable definition EnvDef.
 108                     TRUE is returned if the environment variable was
 109                     set or changed successfully.
 110 */
 111
 112 extern "C" bool Environment_PutEnvironment (const char *EnvDef_, unsigned int _EnvDef_high)
 113 {
 114   char EnvDef[_EnvDef_high+1];
 115
 116   /* make a local copy of each unbounded array.  */
 117   memcpy (EnvDef, EnvDef_, _EnvDef_high+1);
 118
 119   return (libc_putenv (const_cast<void*> (static_cast<const void*>(EnvDef)))) == 0;
 120   /* static analysis guarentees a RETURN statement will be used before here.  */
 121   __builtin_unreachable ();
 122 }
 123
 124 extern "C" void _M2_Environment_init (__attribute__((unused)) int argc, __attribute__((unused)) char *argv[], __attribute__((unused)) char *envp[])
 125 {
 126 }
 127
 128 extern "C" void _M2_Environment_fini (__attribute__((unused)) int argc, __attribute__((unused)) char *argv[], __attribute__((unused)) char *envp[])
 129 {
 130 }