/* Create and destroy argument vectors (argv's)
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright (C) 1992, 2001 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support
This file is part of the libiberty library.
You should have received a copy of the GNU Library General Public
License along with libiberty; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA. */
/* Create and destroy argument vectors. An argument vector is simply an
array of string pointers, terminated by a NULL pointer. */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
#include "ansidecl.h"
#include "libiberty.h"
/* Routines imported from standard C runtime libraries. */
-#ifdef __STDC__
-
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
-#else /* !__STDC__ */
-
-#if !defined _WIN32 || defined __GNUC__
-extern char *memcpy (); /* Copy memory region */
-extern int strlen (); /* Count length of string */
-extern char *malloc (); /* Standard memory allocater */
-extern char *realloc (); /* Standard memory reallocator */
-extern void free (); /* Free malloc'd memory */
-extern char *strdup (); /* Duplicate a string */
-#endif
-
-#endif /* __STDC__ */
-
-
#ifndef NULL
#define NULL 0
#endif
/*
-NAME
-
- dupargv -- duplicate an argument vector
-
-SYNOPSIS
-
- char **dupargv (vector)
- char **vector;
-
-DESCRIPTION
+@deftypefn Extension char** dupargv (char **@var{vector})
- Duplicate an argument vector. Simply scans through the
- vector, duplicating each argument until the
- terminating NULL is found.
+Duplicate an argument vector. Simply scans through @var{vector},
+duplicating each argument until the terminating @code{NULL} is found.
+Returns a pointer to the argument vector if successful. Returns
+@code{NULL} if there is insufficient memory to complete building the
+argument vector.
-RETURNS
-
- Returns a pointer to the argument vector if
- successful. Returns NULL if there is insufficient memory to
- complete building the argument vector.
+@end deftypefn
*/
char **
-dupargv (argv)
- char **argv;
+dupargv (char **argv)
{
int argc;
char **copy;
for (argc = 0; argv[argc] != NULL; argc++)
{
int len = strlen (argv[argc]);
- copy[argc] = malloc (sizeof (char *) * (len + 1));
+ copy[argc] = (char *) malloc (len + 1);
if (copy[argc] == NULL)
{
freeargv (copy);
/*
-NAME
-
- freeargv -- free an argument vector
-
-SYNOPSIS
-
- void freeargv (vector)
- char **vector;
-
-DESCRIPTION
+@deftypefn Extension void freeargv (char **@var{vector})
- Free an argument vector that was built using buildargv. Simply scans
- through the vector, freeing the memory for each argument until the
- terminating NULL is found, and then frees the vector itself.
+Free an argument vector that was built using @code{buildargv}. Simply
+scans through @var{vector}, freeing the memory for each argument until
+the terminating @code{NULL} is found, and then frees @var{vector}
+itself.
-RETURNS
-
- No value.
+@end deftypefn
*/
-void freeargv (vector)
-char **vector;
+void freeargv (char **vector)
{
register char **scan;
/*
-NAME
-
- buildargv -- build an argument vector from a string
-
-SYNOPSIS
-
- char **buildargv (sp)
- char *sp;
-
-DESCRIPTION
+@deftypefn Extension char** buildargv (char *@var{sp})
- Given a pointer to a string, parse the string extracting fields
- separated by whitespace and optionally enclosed within either single
- or double quotes (which are stripped off), and build a vector of
- pointers to copies of the string for each field. The input string
- remains unchanged.
+Given a pointer to a string, parse the string extracting fields
+separated by whitespace and optionally enclosed within either single
+or double quotes (which are stripped off), and build a vector of
+pointers to copies of the string for each field. The input string
+remains unchanged. The last element of the vector is followed by a
+@code{NULL} element.
- All of the memory for the pointer array and copies of the string
- is obtained from malloc. All of the memory can be returned to the
- system with the single function call freeargv, which takes the
- returned result of buildargv, as it's argument.
+All of the memory for the pointer array and copies of the string
+is obtained from @code{malloc}. All of the memory can be returned to the
+system with the single function call @code{freeargv}, which takes the
+returned result of @code{buildargv}, as it's argument.
- The memory for the argv array is dynamically expanded as necessary.
+Returns a pointer to the argument vector if successful. Returns
+@code{NULL} if @var{sp} is @code{NULL} or if there is insufficient
+memory to complete building the argument vector.
-RETURNS
+If the input is a null string (as opposed to a @code{NULL} pointer),
+then buildarg returns an argument vector that has one arg, a null
+string.
- Returns a pointer to the argument vector if successful. Returns NULL
- if the input string pointer is NULL or if there is insufficient
- memory to complete building the argument vector.
+@end deftypefn
-NOTES
+The memory for the argv array is dynamically expanded as necessary.
- In order to provide a working buffer for extracting arguments into,
- with appropriate stripping of quotes and translation of backslash
- sequences, we allocate a working buffer at least as long as the input
- string. This ensures that we always have enough space in which to
- work, since the extracted arg is never larger than the input string.
+In order to provide a working buffer for extracting arguments into,
+with appropriate stripping of quotes and translation of backslash
+sequences, we allocate a working buffer at least as long as the input
+string. This ensures that we always have enough space in which to
+work, since the extracted arg is never larger than the input string.
- If the input is a null string (as opposed to a NULL pointer), then
- buildarg returns an argv that has one arg, a null string.
+The argument vector is always kept terminated with a @code{NULL} arg
+pointer, so it can be passed to @code{freeargv} at any time, or
+returned, as appropriate.
- Argv is always kept terminated with a NULL arg pointer, so it can
- be passed to freeargv at any time, or returned, as appropriate.
*/
-char **buildargv (input)
-char *input;
+char **buildargv (const char *input)
{
char *arg;
char *copybuf;
/* Simple little test driver. */
-static char *tests[] =
+static const char *const tests[] =
{
"a simple command line",
"arg 'foo' is single quoted",
NULL
};
-main ()
+int
+main (void)
{
char **argv;
- char **test;
+ const char *const *test;
char **targs;
for (test = tests; *test != NULL; test++)
freeargv (argv);
}
+ return 0;
}
#endif /* MAIN */
OSDN Git Service
