1 /****************************************************************************
2 * *
3 * GNAT COMPILER COMPONENTS *
4 * *
5 * A R G V *
6 * *
7 * C Implementation File *
8 * *
9 * Copyright (C) 1992-2012, Free Software Foundation, Inc. *
10 * *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. *
17 * *
18 * As a special exception under Section 7 of GPL version 3, you are granted *
19 * additional permissions described in the GCC Runtime Library Exception, *
20 * version 3.1, as published by the Free Software Foundation. *
21 * *
22 * You should have received a copy of the GNU General Public License and *
23 * a copy of the GCC Runtime Library Exception along with this program; *
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
25 * <http://www.gnu.org/licenses/>. *
26 * *
27 * GNAT was originally developed by the GNAT team at New York University. *
28 * Extensive contributions were provided by Ada Core Technologies Inc. *
29 * *
30 ****************************************************************************/
31
32 /* Routines for accessing command line arguments from both the runtime
33 library and from the compiler itself. In the former case, gnat_argc
34 and gnat_argv are the original argc and argv values as stored by the
35 binder generated main program, and these routines are accessed from
36 the Ada.Command_Line package. In the compiler case, gnat_argc and
37 gnat_argv are the values as modified by toplev, and these routines
38 are accessed from the Osint package. */
39
40 /* Also routines for accessing the environment from the runtime library.
41 Gnat_envp is the original envp value as stored by the binder generated
42 main program, and these routines are accessed from the
43 Ada.Command_Line.Environment package. */
44
45 #ifdef IN_RTS
46 #include "tconfig.h"
47 #include "tsystem.h"
48 #include <sys/stat.h>
49 #else
50 #include "config.h"
51 #include "system.h"
52 #endif
53
54 #include "adaint.h"
55
56 #ifdef __cplusplus
57 extern "C" {
58 #endif
59
60 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
61 envp of the main program is saved under gnat_envp. */
62
63 int gnat_argc = 0;
64 const char **gnat_argv = (const char **) 0;
65 const char **gnat_envp = (const char **) 0;
66
67 #if defined (_WIN32) && !defined (RTX)
68 /* Note that on Windows environment the environ point to a buffer that could
69 be reallocated if needed. It means that gnat_envp needs to be updated
70 before using gnat_envp to point to the right environment space */
71 #include <stdlib.h>
72 /* for the environ variable definition */
73 #define gnat_envp (environ)
74 #endif
75
76 int
__gnat_arg_count(void)77 __gnat_arg_count (void)
78 {
79 return gnat_argc;
80 }
81
82 int
__gnat_len_arg(int arg_num)83 __gnat_len_arg (int arg_num)
84 {
85 if (gnat_argv != NULL)
86 return strlen (gnat_argv[arg_num]);
87 else
88 return 0;
89 }
90
91 void
__gnat_fill_arg(char * a,int i)92 __gnat_fill_arg (char *a, int i)
93 {
94 if (gnat_argv != NULL)
95 strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
96 }
97
98 int
__gnat_env_count(void)99 __gnat_env_count (void)
100 {
101 int i;
102
103 for (i = 0; gnat_envp[i]; i++)
104 ;
105 return i;
106 }
107
108 int
__gnat_len_env(int env_num)109 __gnat_len_env (int env_num)
110 {
111 if (gnat_envp != NULL)
112 return strlen (gnat_envp[env_num]);
113 else
114 return 0;
115 }
116
117 void
__gnat_fill_env(char * a,int i)118 __gnat_fill_env (char *a, int i)
119 {
120 if (gnat_envp != NULL)
121 strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
122 }
123
124 #ifdef __cplusplus
125 }
126 #endif
127