2 /* regextype.c -- Decode the name of a regular expression syntax into am
5 Copyright 2005, 2010, 2011 Free Software Foundation, Inc.
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 /* Written by James Youngman, <jay@gnu.org>. */
22 /* config.h must be included first. */
35 #include "regextype.h"
41 # define _(Text) gettext (Text)
46 # define N_(String) gettext_noop (String)
48 /* See locate.c for explanation as to why not use (String) */
49 # define N_(String) String
53 struct tagRegexTypeMap
60 struct tagRegexTypeMap regex_map[] =
62 { "findutils-default", CONTEXT_FINDUTILS, RE_SYNTAX_EMACS|RE_DOT_NEWLINE },
63 { "awk", CONTEXT_ALL, RE_SYNTAX_AWK },
64 { "egrep", CONTEXT_ALL, RE_SYNTAX_EGREP },
65 { "ed", CONTEXT_GENERIC, RE_SYNTAX_ED },
66 { "emacs", CONTEXT_ALL, RE_SYNTAX_EMACS },
67 { "gnu-awk", CONTEXT_ALL, RE_SYNTAX_GNU_AWK },
68 { "grep", CONTEXT_ALL, RE_SYNTAX_GREP },
69 { "posix-awk", CONTEXT_ALL, RE_SYNTAX_POSIX_AWK },
70 { "posix-basic", CONTEXT_ALL, RE_SYNTAX_POSIX_BASIC },
71 { "posix-egrep", CONTEXT_ALL, RE_SYNTAX_POSIX_EGREP },
72 { "posix-extended", CONTEXT_ALL, RE_SYNTAX_POSIX_EXTENDED },
73 { "posix-minimal-basic", CONTEXT_GENERIC, RE_SYNTAX_POSIX_MINIMAL_BASIC },
74 { "sed", CONTEXT_GENERIC, RE_SYNTAX_SED },
75 /* ,{ "posix-common", CONTEXT_GENERIC, _RE_SYNTAX_POSIX_COMMON } */
77 enum { N_REGEX_MAP_ENTRIES = sizeof (regex_map)/sizeof (regex_map[0]) };
80 get_regex_type (const char *s)
87 for (i=0u; i<N_REGEX_MAP_ENTRIES; ++i)
89 if (0 == strcmp (regex_map[i].name, s))
90 return regex_map[i].option_val;
92 msglen += strlen (quote (regex_map[i].name)) + 2u;
95 /* We didn't find a match for the type of regular expression that the
96 * user indicated they wanted. Tell them what the options are.
98 p = buf = xmalloc (1u + msglen);
99 for (i=0u; i<N_REGEX_MAP_ENTRIES; ++i)
106 p += sprintf (p, "%s", quote (regex_map[i].name));
109 error (EXIT_FAILURE, 0,
110 _("Unknown regular expression type %s; valid types are %s."),
119 get_regex_type_name (unsigned int ix)
121 if (ix < N_REGEX_MAP_ENTRIES)
122 return regex_map[ix].name;
128 get_regex_type_flags (unsigned int ix)
130 if (ix < N_REGEX_MAP_ENTRIES)
131 return regex_map[ix].option_val;
136 unsigned int get_regex_type_context (unsigned int ix)
138 if (ix < N_REGEX_MAP_ENTRIES)
139 return regex_map[ix].context;
145 get_regex_type_synonym (unsigned int ix)
150 if (ix >= N_REGEX_MAP_ENTRIES)
153 flags = regex_map[ix].option_val;
154 for (i=0u; i<ix; ++i)
156 if (flags == regex_map[i].option_val)