string/argz.h

   1 /* Routines for dealing with '\0' separated arg vectors.
   2    Copyright (C) 1995-2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _ARGZ_H
  20 #define _ARGZ_H 1
  21
  22 #include <features.h>
  23
  24 #define __need_error_t
  25 #include <errno.h>
  26 #include <string.h>             /* Need size_t, and strchr is called below.  */
  27
  28 #ifndef __error_t_defined
  29 typedef int error_t;
  30 #endif
  31
  32
  33 __BEGIN_DECLS
  34
  35 /* Make a '\0' separated arg vector from a unix argv vector, returning it in
  36    ARGZ, and the total length in LEN.  If a memory allocation error occurs,
  37    ENOMEM is returned, otherwise 0.  The result can be destroyed using free. */
  38 extern error_t __argz_create (char *const __argv[], char **__restrict __argz,
  39                               size_t *__restrict __len) __THROW;
  40 extern error_t argz_create (char *const __argv[], char **__restrict __argz,
  41                             size_t *__restrict __len) __THROW;
  42
  43 /* Make a '\0' separated arg vector from a SEP separated list in
  44    STRING, returning it in ARGZ, and the total length in LEN.  If a
  45    memory allocation error occurs, ENOMEM is returned, otherwise 0.
  46    The result can be destroyed using free.  */
  47 extern error_t __argz_create_sep (const char *__restrict __string,
  48                                   int __sep, char **__restrict __argz,
  49                                   size_t *__restrict __len) __THROW;
  50 extern error_t argz_create_sep (const char *__restrict __string,
  51                                 int __sep, char **__restrict __argz,
  52                                 size_t *__restrict __len) __THROW;
  53
  54 /* Returns the number of strings in ARGZ.  */
  55 extern size_t __argz_count (const char *__argz, size_t __len)
  56      __THROW __attribute_pure__;
  57 extern size_t argz_count (const char *__argz, size_t __len)
  58      __THROW __attribute_pure__;
  59
  60 /* Puts pointers to each string in ARGZ into ARGV, which must be large enough
  61    to hold them all.  */
  62 extern void __argz_extract (const char *__restrict __argz, size_t __len,
  63                             char **__restrict __argv) __THROW;
  64 extern void argz_extract (const char *__restrict __argz, size_t __len,
  65                           char **__restrict __argv) __THROW;
  66
  67 /* Make '\0' separated arg vector ARGZ printable by converting all the '\0's
  68    except the last into the character SEP.  */
  69 extern void __argz_stringify (char *__argz, size_t __len, int __sep) __THROW;
  70 extern void argz_stringify (char *__argz, size_t __len, int __sep) __THROW;
  71
  72 /* Append BUF, of length BUF_LEN to the argz vector in ARGZ & ARGZ_LEN.  */
  73 extern error_t __argz_append (char **__restrict __argz,
  74                               size_t *__restrict __argz_len,
  75                               const char *__restrict __buf, size_t __buf_len)
  76      __THROW;
  77 extern error_t argz_append (char **__restrict __argz,
  78                             size_t *__restrict __argz_len,
  79                             const char *__restrict __buf, size_t __buf_len)
  80      __THROW;
  81
  82 /* Append STR to the argz vector in ARGZ & ARGZ_LEN.  */
  83 extern error_t __argz_add (char **__restrict __argz,
  84                            size_t *__restrict __argz_len,
  85                            const char *__restrict __str) __THROW;
  86 extern error_t argz_add (char **__restrict __argz,
  87                          size_t *__restrict __argz_len,
  88                          const char *__restrict __str) __THROW;
  89
  90 /* Append SEP separated list in STRING to the argz vector in ARGZ &
  91    ARGZ_LEN.  */
  92 extern error_t __argz_add_sep (char **__restrict __argz,
  93                                size_t *__restrict __argz_len,
  94                                const char *__restrict __string, int __delim)
  95      __THROW;
  96 extern error_t argz_add_sep (char **__restrict __argz,
  97                              size_t *__restrict __argz_len,
  98                              const char *__restrict __string, int __delim)
  99      __THROW;
 100
 101 /* Delete ENTRY from ARGZ & ARGZ_LEN, if it appears there.  */
 102 extern void __argz_delete (char **__restrict __argz,
 103                            size_t *__restrict __argz_len,
 104                            char *__restrict __entry) __THROW;
 105 extern void argz_delete (char **__restrict __argz,
 106                          size_t *__restrict __argz_len,
 107                          char *__restrict __entry) __THROW;
 108
 109 /* Insert ENTRY into ARGZ & ARGZ_LEN before BEFORE, which should be an
 110    existing entry in ARGZ; if BEFORE is NULL, ENTRY is appended to the end.
 111    Since ARGZ's first entry is the same as ARGZ, argz_insert (ARGZ, ARGZ_LEN,
 112    ARGZ, ENTRY) will insert ENTRY at the beginning of ARGZ.  If BEFORE is not
 113    in ARGZ, EINVAL is returned, else if memory can't be allocated for the new
 114    ARGZ, ENOMEM is returned, else 0.  */
 115 extern error_t __argz_insert (char **__restrict __argz,
 116                               size_t *__restrict __argz_len,
 117                               char *__restrict __before,
 118                               const char *__restrict __entry) __THROW;
 119 extern error_t argz_insert (char **__restrict __argz,
 120                             size_t *__restrict __argz_len,
 121                             char *__restrict __before,
 122                             const char *__restrict __entry) __THROW;
 123
 124 /* Replace any occurrences of the string STR in ARGZ with WITH, reallocating
 125    ARGZ as necessary.  If REPLACE_COUNT is non-zero, *REPLACE_COUNT will be
 126    incremented by number of replacements performed.  */
 127 extern error_t __argz_replace (char **__restrict __argz,
 128                                size_t *__restrict __argz_len,
 129                                const char *__restrict __str,
 130                                const char *__restrict __with,
 131                                unsigned int *__restrict __replace_count);
 132 extern error_t argz_replace (char **__restrict __argz,
 133                              size_t *__restrict __argz_len,
 134                              const char *__restrict __str,
 135                              const char *__restrict __with,
 136                              unsigned int *__restrict __replace_count);
 137 \f
 138 /* Returns the next entry in ARGZ & ARGZ_LEN after ENTRY, or NULL if there
 139    are no more.  If entry is NULL, then the first entry is returned.  This
 140    behavior allows two convenient iteration styles:
 141
 142     char *entry = 0;
 143     while ((entry = argz_next (argz, argz_len, entry)))
 144       ...;
 145
 146    or
 147
 148     char *entry;
 149     for (entry = argz; entry; entry = argz_next (argz, argz_len, entry))
 150       ...;
 151 */
 152 extern char *__argz_next (const char *__restrict __argz, size_t __argz_len,
 153                           const char *__restrict __entry) __THROW;
 154 extern char *argz_next (const char *__restrict __argz, size_t __argz_len,
 155                         const char *__restrict __entry) __THROW;
 156
 157 #ifdef __USE_EXTERN_INLINES
 158 __extern_inline char *
 159 __NTH (__argz_next (const char *__argz, size_t __argz_len,
 160                     const char *__entry))
 161 {
 162   if (__entry)
 163     {
 164       if (__entry < __argz + __argz_len)
 165         __entry = strchr (__entry, '\0') + 1;
 166
 167       return __entry >= __argz + __argz_len ? (char *) NULL : (char *) __entry;
 168     }
 169   else
 170     return __argz_len > 0 ? (char *) __argz : 0;
 171 }
 172 __extern_inline char *
 173 __NTH (argz_next (const char *__argz, size_t __argz_len,
 174                   const char *__entry))
 175 {
 176   return __argz_next (__argz, __argz_len, __entry);
 177 }
 178 #endif /* Use extern inlines.  */
 179
 180 __END_DECLS
 181
 182 #endif /* argz.h */