PR fortran/15280

	PR fortran/15665
	* gfortran.h (enum gfc_generic_isym_id): Add GFC_ISYM_IARGC and
	GFC_ISYM_COMMAND_ARGUMENT_COUNT.
	* intrinsic.c (add_functions):  Identify iargc.  Add
	command_argument_count.
	(add_subroutines): Resolve getarg.  Add get_command and
	get_command_argument.
	* intrinsic.h (gfc_resolve_getarg, gfc_resolve_get_command,
	gfc_resolve_get_command_argument): Add prototypes.
	* iresolve.c (gfc_resolve_getarg, gfc_resolve_get_command,
	gfc_resolve_get_command_argument): New functions.
	* trans-decl.c (gfor_fndecl_iargc): New variable.
	(gfc_build_intrinsic_function_decls): Set it.
	* trans-intrinsic.c (gfc_conv_intrinsic_iargc): New function.
	(gfc_conv_intrinsic_function): Use it.
	* trans.h (gfor_fndecl_iargc): Declare.
libgfortran/
	* libgfortran.h (gfc_strlen_type): Define.
	* intrinsics/args.c (getarg): Rename ...
	(getarg_i4): ... to this.
	(getarg_i8, get_command_argument_i4, get_command_argument_i8,
	get_command_i4, get_command_i8): New functions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@84087 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 196 insertions, 4 deletions

diff --git a/libgfortran/intrinsics/args.c b/libgfortran/intrinsics/args.c
index da684fd99d4..caa55d46d8b 100644
--- a/libgfortran/intrinsics/args.c
+++ b/libgfortran/intrinsics/args.c
@@ -1,5 +1,7 @@
-/* Implementation of the IARG/ARGC intrinsic(s).
+/* Implementation of the GETARG and IARGC g77, and
+   corresponding F2003, intrinsics. 
    Copyright (C) 2004 Free Software Foundation, Inc.
+   Contributed by Bud Davis and Janne Blomqvist.
 
 This file is part of the GNU Fortran 95 runtime library (libgfortran).
 
@@ -23,8 +25,11 @@ Boston, MA 02111-1307, USA.  */
 #include <string.h>
 #include "libgfortran.h"
 
+
+/* Get a commandline argument.  */
+
 void 
-prefix(getarg) (GFC_INTEGER_4 *pos, char  *val, GFC_INTEGER_4 val_len)
+prefix(getarg_i4) (GFC_INTEGER_4 *pos, char  *val, gfc_strlen_type val_len)
 {
   int argc;
   int arglen;
@@ -35,7 +40,7 @@ prefix(getarg) (GFC_INTEGER_4 *pos, char  *val, GFC_INTEGER_4 val_len)
   if (val_len < 1 || !val )
     return;   /* something is wrong , leave immediately */
   
-  memset( val, ' ', val_len);
+  memset (val, ' ', val_len);
 
   if ((*pos) + 1 <= argc  && *pos >=0 )
     {
@@ -46,8 +51,23 @@ prefix(getarg) (GFC_INTEGER_4 *pos, char  *val, GFC_INTEGER_4 val_len)
     }
 }
 
+
+/* INTEGER*8 wrapper of getarg.  */
+
+void 
+prefix(getarg_i8) (GFC_INTEGER_8 *pos, char  *val, gfc_strlen_type val_len)
+{
+  GFC_INTEGER_4 pos4;
+
+  pos4 = (GFC_INTEGER_4) *pos;
+  prefix(getarg_i4) (&pos4, val, val_len);
+}
+
+
+/* Return the number of commandline arguments.  */
+
 GFC_INTEGER_4
-prefix(iargc) ()
+prefix(iargc) (void)
 {
   int argc;
   char **argv;
@@ -56,3 +76,175 @@ prefix(iargc) ()
 
   return argc;
 } 
+
+
+/* F2003 intrinsic functions and subroutines related to command line
+   arguments.
+
+   - function command_argument_count() is converted to iargc by the compiler.
+
+   - subroutine get_command([command, length, status]).
+
+   - subroutine get_command_argument(number, [value, length, status]).
+*/
+
+/* These two status codes are specified in the standard. */
+#define GFC_GC_SUCCESS 0
+#define GFC_GC_VALUE_TOO_SHORT -1
+
+/* Processor-specific status failure code. */
+#define GFC_GC_FAILURE 42
+
+
+/* Get a single commandline argument.  */
+
+void
+prefix(get_command_argument_i4) (GFC_INTEGER_4 *number, 
+				 char *value, 
+				 GFC_INTEGER_4 *length, 
+				 GFC_INTEGER_4 *status, 
+				 gfc_strlen_type value_len)
+{
+  int argc, arglen = 0, stat_flag = GFC_GC_SUCCESS;
+  char **argv;
+
+  if (number == NULL )
+    /* Should never happen.  */
+    runtime_error ("Missing argument to get_command_argument");
+
+  if (value == NULL && length == NULL && status == NULL)
+    return; /* No need to do anything.  */
+
+  get_args (&argc, &argv);
+
+  if (*number < 0 || *number >= argc)
+    stat_flag = GFC_GC_FAILURE;
+  else
+    arglen = strlen(argv[*number]);    
+
+  if (value != NULL)
+    {
+      if (value_len < 1)
+	stat_flag = GFC_GC_FAILURE;
+      else
+	memset (value, ' ', value_len);
+    }
+
+  if (value != NULL && stat_flag != GFC_GC_FAILURE)
+    {
+      if (arglen > value_len)
+       {
+	 arglen = value_len;
+	 stat_flag = GFC_GC_VALUE_TOO_SHORT;
+       }
+      memcpy (value, argv[*number], arglen);
+    }
+
+  if (length != NULL)
+    *length = arglen;
+
+  if (status != NULL)
+    *status = stat_flag;
+}
+
+
+/* INTEGER*8 wrapper for get_command_argument.  */
+
+void
+prefix(get_command_argument_i8) (GFC_INTEGER_8 *number, 
+				 char *value, 
+				 GFC_INTEGER_8 *length, 
+				 GFC_INTEGER_8 *status, 
+				 gfc_strlen_type value_len)
+{
+  GFC_INTEGER_4 number4;
+  GFC_INTEGER_4 length4;
+  GFC_INTEGER_4 status4;
+
+  number4 = (GFC_INTEGER_4) *number;
+  prefix (get_command_argument_i4) (&number4, value, &length4, &status4,
+				    value_len);
+  if (length)
+    *length = length4;
+  if (status)
+    *status = status4;
+}
+
+
+/* Return the whole commandline.  */
+
+void
+prefix(get_command_i4) (char *command, 
+			GFC_INTEGER_4 *length, 
+			GFC_INTEGER_4 *status,
+			gfc_strlen_type command_len)
+{
+  int i, argc, arglen, thisarg;
+  int stat_flag = GFC_GC_SUCCESS;
+  int tot_len = 0;
+  char **argv;
+
+  if (command == NULL && length == NULL && status == NULL)
+    return; /* No need to do anything.  */
+
+  get_args (&argc, &argv);
+
+  if (command != NULL)
+    {
+      /* Initialize the string to blanks.  */
+      if (command_len < 1)
+	stat_flag = GFC_GC_FAILURE;
+      else
+	memset (command, ' ', command_len);
+    }
+
+  for (i = 0; i < argc ; i++)
+    {
+      arglen = strlen(argv[i]);
+
+      if (command != NULL && stat_flag == GFC_GC_SUCCESS)
+	{
+	  thisarg = arglen;
+	  if (tot_len + thisarg > command_len)
+	    {
+	      thisarg = command_len - tot_len; /* Truncate.  */
+	      stat_flag = GFC_GC_VALUE_TOO_SHORT;
+	    }
+	  /* Also a space before the next arg.  */
+	  else if (i != argc - 1 && tot_len + arglen == command_len)
+	    stat_flag = GFC_GC_VALUE_TOO_SHORT;
+
+	  memcpy (&command[tot_len], argv[i], thisarg);
+	}
+
+      /* Add the legth of the argument.  */
+      tot_len += arglen;
+      if (i != argc - 1)
+	tot_len++;
+    }
+
+  if (length != NULL)
+    *length = tot_len;
+
+  if (status != NULL)
+    *status = stat_flag;
+}
+
+
+/* INTEGER*8 wrapper for get_command.  */
+
+void
+prefix(get_command_i8) (char *command, 
+			GFC_INTEGER_8 *length, 
+			GFC_INTEGER_8 *status,
+			gfc_strlen_type command_len)
+{
+  GFC_INTEGER_4 length4;
+  GFC_INTEGER_4 status4;
+
+  prefix (get_command_i4) (command, &length4, &status4, command_len);
+  if (length)
+    *length = length4;
+  if (status)
+    *status = status4;
+}