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Diffstat (limited to 'string/argz.h')
| -rw-r--r-- | string/argz.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/string/argz.h b/string/argz.h new file mode 100644 index 0000000000..9c03815915 --- /dev/null +++ b/string/argz.h @@ -0,0 +1,100 @@ +/* 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 <errno.h> /* Define error_t. */ +#include <string.h> /* Need size_t, and strchr is called below. */ + +/* 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 (char **argv, char **argz, size_t *len); +error_t argz_create (char **argv, char **argz, size_t *len); + +/* Returns the number of strings in ARGZ. */ +size_t __argz_count (const char *argz, size_t len); +size_t argz_count (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 (const char *argz, size_t len, char **argv); +void argz_extract (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 (char *argz, size_t len, int sep); +void argz_stringify (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 (char **argz, size_t *argz_len, + const char *buf, size_t buf_len); +error_t argz_append (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 (char **argz, size_t *argz_len, const char *str); +error_t argz_add (char **argz, size_t *argz_len, const char *str); + +/* Delete ENTRY from ARGZ & ARGZ_LEN, if it appears there. */ +void __argz_delete (char **argz, size_t *argz_len, char *entry); +void argz_delete (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 (char **argz, size_t *argz_len, + char *before, const char *entry); +error_t argz_insert (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 inline char * +argz_next (char *argz, size_t argz_len, const char *entry) +{ + if (entry) + if (entry >= argz + argz_len) + return 0; + else + return strchr (entry, '\0') + 1; + else + if (argz_len > 0) + return argz; + else + return 0; +} + +#endif /* __ARGZ_H__ */ |