Dogcows Code - chaz/tar/blob - lib/wordsplit.h

   1 /* wordsplit - a word splitter
   2    Copyright (C) 2009-2014 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU General Public License as published by the
   6    Free Software Foundation; either version 3 of the License, or (at your
   7    option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License along
  15    with this program. If not, see <http://www.gnu.org/licenses/>.
  16
  17    Written by Sergey Poznyakoff
  18 */
  19
  20 #ifndef __WORDSPLIT_H
  21 #define __WORDSPLIT_H
  22
  23 #include <stddef.h>
  24
  25 #if 2 < __GNUC__ + (7 <= __GNUC_MINOR__)
  26 # define __WORDSPLIT_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
  27 #else
  28 # define __WORDSPLIT_ATTRIBUTE_FORMAT(spec) /* empty */
  29 #endif
  30
  31 struct wordsplit
  32 {
  33   size_t ws_wordc;
  34   char **ws_wordv;
  35   size_t ws_offs;
  36   size_t ws_wordn;
  37   int ws_flags;
  38   const char *ws_delim;
  39   const char *ws_comment;
  40   const char *ws_escape;
  41   void (*ws_alloc_die) (struct wordsplit * wsp);
  42   void (*ws_error) (const char *, ...)
  43     __WORDSPLIT_ATTRIBUTE_FORMAT ((__printf__, 1, 2));
  44   void (*ws_debug) (const char *, ...)
  45     __WORDSPLIT_ATTRIBUTE_FORMAT ((__printf__, 1, 2));
  46
  47   const char **ws_env;
  48   const char *(*ws_getvar) (const char *, size_t, void *);
  49   void *ws_closure;
  50
  51   const char *ws_input;
  52   size_t ws_len;
  53   size_t ws_endp;
  54   int ws_errno;
  55   struct wordsplit_node *ws_head, *ws_tail;
  56 };
  57
  58 /* Wordsplit flags.  Only 2 bits of a 32-bit word remain unused.
  59    It is getting crowded... */
  60 /* Append the words found to the array resulting from a previous
  61    call. */
  62 #define WRDSF_APPEND            0x00000001
  63 /* Insert we_offs initial NULLs in the array ws_wordv.
  64    (These are not counted in the returned ws_wordc.) */
  65 #define WRDSF_DOOFFS            0x00000002
  66 /* Don't do command substitution. Reserved for future use. */
  67 #define WRDSF_NOCMD             0x00000004
  68 /* The parameter p resulted from a previous call to
  69    wordsplit(), and wordsplit_free() was not called. Reuse the
  70    allocated storage. */
  71 #define WRDSF_REUSE             0x00000008
  72 /* Print errors */
  73 #define WRDSF_SHOWERR           0x00000010
  74 /* Consider it an error if an undefined shell variable
  75    is expanded. */
  76 #define WRDSF_UNDEF             0x00000020
  77
  78 /* Don't do variable expansion. */
  79 #define WRDSF_NOVAR             0x00000040
  80 /* Abort on ENOMEM error */
  81 #define WRDSF_ENOMEMABRT        0x00000080
  82 /* Trim off any leading and trailind whitespace */
  83 #define WRDSF_WS                0x00000100
  84 /* Handle single quotes */
  85 #define WRDSF_SQUOTE            0x00000200
  86 /* Handle double quotes */
  87 #define WRDSF_DQUOTE            0x00000400
  88 /* Handle quotes and escape directives */
  89 #define WRDSF_QUOTE             (WRDSF_SQUOTE|WRDSF_DQUOTE)
  90 /* Replace each input sequence of repeated delimiters with a single
  91    delimiter */
  92 #define WRDSF_SQUEEZE_DELIMS    0x00000800
  93 /* Return delimiters */
  94 #define WRDSF_RETURN_DELIMS     0x00001000
  95 /* Treat sed expressions as words */
  96 #define WRDSF_SED_EXPR          0x00002000
  97 /* ws_delim field is initialized */
  98 #define WRDSF_DELIM             0x00004000
  99 /* ws_comment field is initialized */
 100 #define WRDSF_COMMENT           0x00008000
 101 /* ws_alloc_die field is initialized */
 102 #define WRDSF_ALLOC_DIE         0x00010000
 103 /* ws_error field is initialized */
 104 #define WRDSF_ERROR             0x00020000
 105 /* ws_debug field is initialized */
 106 #define WRDSF_DEBUG             0x00040000
 107 /* ws_env field is initialized */
 108 #define WRDSF_ENV               0x00080000
 109 /* ws_getvar field is initialized */
 110 #define WRDSF_GETVAR            0x00100000
 111 /* enable debugging */
 112 #define WRDSF_SHOWDBG           0x00200000
 113 /* Don't split input into words.  Useful for side effects. */
 114 #define WRDSF_NOSPLIT           0x00400000
 115 /* Keep undefined variables in place, instead of expanding them to
 116    empty string */
 117 #define WRDSF_KEEPUNDEF         0x00800000
 118 /* Warn about undefined variables */
 119 #define WRDSF_WARNUNDEF         0x01000000
 120 /* Handle C escapes */
 121 #define WRDSF_CESCAPES          0x02000000
 122
 123 /* ws_closure is set */
 124 #define WRDSF_CLOSURE           0x04000000
 125 /* ws_env is a Key/Value environment, i.e. the value of a variable is
 126    stored in the element that follows its name. */
 127 #define WRDSF_ENV_KV            0x08000000
 128
 129 /* ws_escape is set */
 130 #define WRDSF_ESCAPE            0x10000000
 131
 132 /* Incremental mode */
 133 #define WRDSF_INCREMENTAL       0x20000000
 134
 135 #define WRDSF_DEFFLAGS         \
 136   (WRDSF_NOVAR | WRDSF_NOCMD | \
 137    WRDSF_QUOTE | WRDSF_SQUEEZE_DELIMS | WRDSF_CESCAPES)
 138
 139 #define WRDSE_EOF        0
 140 #define WRDSE_QUOTE      1
 141 #define WRDSE_NOSPACE    2
 142 #define WRDSE_NOSUPP     3
 143 #define WRDSE_USAGE      4
 144 #define WRDSE_CBRACE     5
 145 #define WRDSE_UNDEF      6
 146 #define WRDSE_NOINPUT    7
 147
 148 int wordsplit (const char *s, struct wordsplit *p, int flags);
 149 int wordsplit_len (const char *s, size_t len,
 150                       struct wordsplit *p, int flags);
 151 void wordsplit_free (struct wordsplit *p);
 152 void wordsplit_free_words (struct wordsplit *ws);
 153
 154 int wordsplit_c_unquote_char (int c);
 155 int wordsplit_c_quote_char (int c);
 156 size_t wordsplit_c_quoted_length (const char *str, int quote_hex,
 157                                   int *quote);
 158 void wordsplit_general_unquote_copy (char *dst, const char *src, size_t n,
 159                                      const char *escapable);
 160 void wordsplit_sh_unquote_copy (char *dst, const char *src, size_t n);
 161 void wordsplit_c_unquote_copy (char *dst, const char *src, size_t n);
 162 void wordsplit_c_quote_copy (char *dst, const char *src, int quote_hex);
 163
 164 void wordsplit_perror (struct wordsplit *ws);
 165 const char *wordsplit_strerror (struct wordsplit *ws);
 166
 167
 168 #endif