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- /* Routines for dealing with '\0' separated arg vectors.
-
- Copyright (C) 1995, 1996 Free Software Foundation, Inc.
-
- Written by Miles Bader <miles@gnu.ai.mit.edu>
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #ifndef __ARGZ_H__
- #define __ARGZ_H__ 1
-
- #include <features.h>
-
- #include <string.h> /* Need size_t, and strchr is called below. */
-
- /* The Hurd <errnos.h> defines `error_t' as an enumerated type
- so that printing `error_t' values in the debugger shows the names. */
- #ifndef __error_t_defined
- typedef int error_t;
- #define __error_t_defined 1
- #endif
-
-
- __BEGIN_DECLS
-
- /* Make a '\0' separated arg vector from a unix argv vector, returning it in
- ARGZ, and the total length in LEN. If a memory allocation error occurs,
- ENOMEM is returned, otherwise 0. The result can be destroyed using free. */
- error_t __argz_create __P ((char *const argv[], char **argz, size_t *len));
- error_t argz_create __P ((char *const *argv[], char **argz, size_t *len));
-
- /* Make a '\0' separated arg vector from a SEP separated list in
- STRING, returning it in ARGZ, and the total length in LEN. If a
- memory allocation error occurs, ENOMEM is returned, otherwise 0.
- The result can be destroyed using free. */
- error_t __argz_create_sep __P ((__const char *string, int sep,
- char **argz, size_t *len));
- error_t argz_create_sep __P ((__const char *string, int sep,
- char **argz, size_t *len));
-
- /* Returns the number of strings in ARGZ. */
- size_t __argz_count __P ((__const char *argz, size_t len));
- size_t argz_count __P ((__const char *argz, size_t len));
-
- /* Puts pointers to each string in ARGZ into ARGV, which must be large enough
- to hold them all. */
- void __argz_extract __P ((__const char *argz, size_t len, char **argv));
- void argz_extract __P ((__const char *argz, size_t len, char **argv));
-
- /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
- except the last into the character SEP. */
- void __argz_stringify __P ((char *argz, size_t len, int sep));
- void argz_stringify __P ((char *argz, size_t len, int sep));
-
- /* Append BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN. */
- error_t __argz_append __P ((char **argz, size_t *argz_len,
- __const char *buf, size_t buf_len));
- error_t argz_append __P ((char **argz, size_t *argz_len,
- __const char *buf, size_t buf_len));
-
- /* Append STR to the argz vector in ARGZ & ARGZ_LEN. */
- error_t __argz_add __P ((char **argz, size_t *argz_len,
- __const char *str));
- error_t argz_add __P ((char **argz, size_t *argz_len,
- __const char *str));
-
- /* Delete ENTRY from ARGZ & ARGZ_LEN, if it appears there. */
- void __argz_delete __P ((char **argz, size_t *argz_len, char *entry));
- void argz_delete __P ((char **argz, size_t *argz_len, char *entry));
-
- /* Insert ENTRY into ARGZ & ARGZ_LEN before BEFORE, which should be an
- existing entry in ARGZ; if BEFORE is NULL, ENTRY is appended to the end.
- Since ARGZ's first entry is the same as ARGZ, argz_insert (ARGZ, ARGZ_LEN,
- ARGZ, ENTRY) will insert ENTRY at the beginning of ARGZ. If BEFORE is not
- in ARGZ, EINVAL is returned, else if memory can't be allocated for the new
- ARGZ, ENOMEM is returned, else 0. */
- error_t __argz_insert __P ((char **argz, size_t *argz_len,
- char *before, __const char *entry));
- error_t argz_insert __P ((char **argz, size_t *argz_len,
- char *before, __const char *entry));
-
- /* Returns the next entry in ARGZ & ARGZ_LEN after ENTRY, or NULL if there
- are no more. If entry is NULL, then the first entry is returned. This
- behavior allows two convenient iteration styles:
-
- char *entry = 0;
- while ((entry = argz_next (argz, argz_len, entry)))
- ...;
-
- or
-
- char *entry;
- for (entry = argz; entry; entry = argz_next (argz, argz_len, entry))
- ...;
- */
- extern char *__argz_next __P ((char *argz, size_t __argz_len,
- __const char *entry));
- extern char *argz_next __P ((char *argz, size_t __argz_len,
- __const char *entry));
-
- #if defined (__OPTIMIZE__) && __GNUC__ >= 2
- extern inline char *
- __argz_next (char *argz, size_t argz_len, const char *entry)
- {
- if (entry)
- {
- if (entry < argz + argz_len)
- entry = strchr (entry, '\0') + 1;
-
- return entry >= argz + argz_len ? NULL : (char *) entry;
- }
- else
- if (argz_len > 0)
- return argz;
- else
- return 0;
- }
- extern inline char *
- argz_next (char *argz, size_t argz_len, const char *entry)
- {
- return __argz_next (argz, argz_len, entry);
- }
- #endif /* optimizing GCC2 */
-
- #endif /* __ARGZ_H__ */
-