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1 /****************************************************************************
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2 * *
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3 * GNAT COMPILER COMPONENTS *
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4 * *
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5 * A R G V *
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6 * *
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7 * C Implementation File *
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8 * *
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9 * Copyright (C) 1992-2012, Free Software Foundation, Inc. *
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10 * *
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11 * GNAT is free software; you can redistribute it and/or modify it under *
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12 * terms of the GNU General Public License as published by the Free Soft- *
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13 * ware Foundation; either version 3, or (at your option) any later ver- *
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14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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16 * or FITNESS FOR A PARTICULAR PURPOSE. *
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17 * *
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18 * As a special exception under Section 7 of GPL version 3, you are granted *
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19 * additional permissions described in the GCC Runtime Library Exception, *
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20 * version 3.1, as published by the Free Software Foundation. *
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21 * *
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22 * You should have received a copy of the GNU General Public License and *
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23 * a copy of the GCC Runtime Library Exception along with this program; *
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24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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25 * <http://www.gnu.org/licenses/>. *
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26 * *
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27 * GNAT was originally developed by the GNAT team at New York University. *
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28 * Extensive contributions were provided by Ada Core Technologies Inc. *
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29 * *
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30 ****************************************************************************/
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31
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32 /* Routines for accessing command line arguments from both the runtime
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33 library and from the compiler itself. In the former case, gnat_argc
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34 and gnat_argv are the original argc and argv values as stored by the
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35 binder generated main program, and these routines are accessed from
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36 the Ada.Command_Line package. In the compiler case, gnat_argc and
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37 gnat_argv are the values as modified by toplev, and these routines
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38 are accessed from the Osint package. */
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39
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40 /* Also routines for accessing the environment from the runtime library.
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41 Gnat_envp is the original envp value as stored by the binder generated
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42 main program, and these routines are accessed from the
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43 Ada.Command_Line.Environment package. */
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44
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45 #ifdef IN_RTS
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46 #include "tconfig.h"
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47 #include "tsystem.h"
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48 #include <sys/stat.h>
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49 #else
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50 #include "config.h"
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51 #include "system.h"
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52 #endif
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53
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54 #include "adaint.h"
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55
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56 #ifdef __cplusplus
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57 extern "C" {
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58 #endif
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59
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60 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
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61 envp of the main program is saved under gnat_envp. */
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62
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63 int gnat_argc = 0;
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64 const char **gnat_argv = (const char **) 0;
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65 const char **gnat_envp = (const char **) 0;
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66
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67 #if defined (_WIN32) && !defined (RTX)
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68 /* Note that on Windows environment the environ point to a buffer that could
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69 be reallocated if needed. It means that gnat_envp needs to be updated
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70 before using gnat_envp to point to the right environment space */
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71 #include <stdlib.h>
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72 /* for the environ variable definition */
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73 #define gnat_envp (environ)
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74 #endif
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75
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76 int
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77 __gnat_arg_count (void)
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78 {
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79 return gnat_argc;
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80 }
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81
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82 int
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83 __gnat_len_arg (int arg_num)
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84 {
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85 if (gnat_argv != NULL)
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86 return strlen (gnat_argv[arg_num]);
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87 else
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88 return 0;
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89 }
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90
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91 void
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92 __gnat_fill_arg (char *a, int i)
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93 {
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94 if (gnat_argv != NULL)
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95 strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
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96 }
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97
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98 int
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99 __gnat_env_count (void)
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100 {
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101 int i;
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102
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103 for (i = 0; gnat_envp[i]; i++)
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104 ;
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105 return i;
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106 }
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107
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108 int
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109 __gnat_len_env (int env_num)
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110 {
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111 if (gnat_envp != NULL)
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112 return strlen (gnat_envp[env_num]);
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113 else
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114 return 0;
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115 }
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116
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117 void
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118 __gnat_fill_env (char *a, int i)
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119 {
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120 if (gnat_envp != NULL)
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121 strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
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122 }
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123
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124 #ifdef __cplusplus
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125 }
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126 #endif
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