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Under GNU General Public License
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ARGZ_ADD(3) ARGZ_ADD(3)
NAME
argz_add, argz_add_sep, argz_append, argz_count, argz_create, argz_create_sep,
argz_delete, argz_extract, argz_insert, argz_next, argz_replace, argz_stringify -
functions to handle an argz list
SYNOPSIS
#include <argz.h>
error_t
argz_add(char **argz, size_t *argz_len, const char *str);
error_t
argz_add_sep(char **argz, size_t *argz_len,
const char *str, int delim);
error_t
argz_append(char **argz, size_t *argz_len,
const char *buf, size_t buf_len);
size_t
argz_count(const char *argz, size_t argz_len);
error_t
argz_create(char * const argv[], char **argz,
size_t *argz_len);
error_t
argz_create_sep(const char *str, int sep, char **argz,
size_t *argz_len);
error_t
argz_delete(char **argz, size_t *argz_len, char *entry);
void
argz_extract(char *argz, size_t argz_len, char **argv);
error_t
argz_insert (char **argz, size_t *argz_len, char *before,
const char *entry);
char *
argz_next(char *argz, size_t argz_len, const char *entry);
error_t
argz_replace(char **argz, size_t *argz_len, const char *str,
const char *with, unsigned int *replace_count);
void
argz_stringify(char *argz, size_t len, int sep);
DESCRIPTION
These functions are glibc-specific.
An argz vector is a pointer to a character buffer together with a length. The
intended interpretation of the character buffer is array of strings, where the
strings are separated by NUL bytes. If the length is nonzero, the last byte of the
buffer must be a NUL.
These functions are for handling argz vectors. The pair (NULL,0) is an argz vec-
tor, and, conversely, argz vectors of length 0 must have NULL pointer. Allocation
of nonempty argz vectors is done using malloc(3), so that free(3) can be used to
dispose of them again.
argz_add() adds the string str at the end of the array *argz, and updates *argz and
*argz_len.
argz_add_sep() is similar, but splits the string str into substrings separated by
the delimiter delim. For example, one might use this on a Unix search path with
delimiter ’:’.
argz_append() appends the argz vector (buf,buf_len) after (*argz,*argz_len) and
updates *argz and *argz_len. (Thus, *argz_len will be increased by buf_len.)
argz_count() counts the number of strings, that is, the number of NUL bytes, in
(argz,argz_len).
argz_create() converts a Unix-style argument vector argv, terminated by (char *) 0,
into an argz vector (*argz,*argz_len).
argz_create_sep() converts the NUL-terminated string str into an argz vector
(*argz,*argz_len) by breaking it up at every occurrence of the separator sep.
argz_delete() removes the substring pointed to by entry from the argz vector
(*argz,*argz_len) and updates *argz and *argz_len.
argz_extract() is the opposite of argz_create(). It takes the argz vector
(argz,argz_len) and fills the array starting at argv with pointers to the sub-
strings, and a final NULL, making a Unix-style argv vector. The array argv must
have room for argz_count(argz,argz_len) + 1 pointers.
argz_insert() is the opposite of argz_delete(). It inserts the argument entry at
position before into the argz vector (*argz,*argz_len) and updates *argz and
*argz_len. If before is NULL, then entry will inserted at the end.
argz_next() is a function to step trough the argz vector. If entry is NULL, the
first entry is returned. Otherwise, the entry following is returned. It returns
NULL if there is no following entry.
argz_replace() replaces each occurrence of str with with, reallocating argz as nec-
essary. If replace_count is non-NULL, *replace_count will be incremented by the
number of replacements.
argz_stringify() is the opposite of argz_create_sep(). It transforms the argz vec-
tor into a normal string by replacing all NULs except the last by sep.
RETURN VALUE
All argz functions that do memory allocation have a return type of error_t, and
return 0 for success, and ENOMEM if an allocation error occurs.
BUGS
Argz vectors without final NUL may lead to Segmentation Faults.
NOTES
These functions are a GNU extension. Handle with care.
SEE ALSO
envz(3)
ARGZ_ADD(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2009-01-08 04:22 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)