Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 1 | /* bracecomp.c -- Complete a filename with the possible completions enclosed |
| 2 | in csh-style braces such that the list of completions is available to the |
| 3 | shell. */ |
| 4 | |
| 5 | /* Original version by tromey@cns.caltech.edu, Fri Feb 7 1992. */ |
| 6 | |
| 7 | /* Copyright (C) 1993 Free Software Foundation, Inc. |
| 8 | |
| 9 | This file is part of GNU Bash, the Bourne Again SHell. |
| 10 | |
| 11 | Bash is free software; you can redistribute it and/or modify it under |
| 12 | the terms of the GNU General Public License as published by the Free |
| 13 | Software Foundation; either version 2, or (at your option) any later |
| 14 | version. |
| 15 | |
| 16 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY |
| 17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 18 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 19 | for more details. |
| 20 | |
| 21 | You should have received a copy of the GNU General Public License along |
| 22 | with Bash; see the file COPYING. If not, write to the Free Software |
| 23 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 24 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 25 | #include "config.h" |
| 26 | #if defined (BRACE_EXPANSION) && defined (READLINE) |
| 27 | |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 28 | #include <stdio.h> |
| 29 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 30 | #if defined (HAVE_UNISTD_H) |
| 31 | # include <unistd.h> |
| 32 | #endif |
| 33 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame^] | 34 | #include "bashansi.h" |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 35 | |
| 36 | #include "shell.h" |
| 37 | #include <readline/readline.h> |
| 38 | |
| 39 | /* Find greatest common prefix of two strings. */ |
| 40 | static int |
| 41 | string_gcd (s1, s2) |
| 42 | char *s1, *s2; |
| 43 | { |
| 44 | register int i; |
| 45 | |
| 46 | if (s1 == NULL || s2 == NULL) |
| 47 | return (0); |
| 48 | |
| 49 | for (i = 0; *s1 && *s2; ++s1, ++s2, ++i) |
| 50 | { |
| 51 | if (*s1 != *s2) |
| 52 | break; |
| 53 | } |
| 54 | |
| 55 | return (i); |
| 56 | } |
| 57 | |
| 58 | static char * |
| 59 | really_munge_braces (array, real_start, real_end, gcd_zero) |
| 60 | char **array; |
| 61 | int real_start, real_end, gcd_zero; |
| 62 | { |
| 63 | int start, end, gcd; |
| 64 | char *result, *subterm; |
| 65 | int result_size, flag; |
| 66 | |
| 67 | flag = 0; |
| 68 | |
| 69 | if (real_start == real_end) |
| 70 | { |
| 71 | if (array[real_start]) |
| 72 | return (savestring (array[real_start] + gcd_zero)); |
| 73 | else |
| 74 | return (savestring (array[0])); |
| 75 | } |
| 76 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 77 | result = xmalloc (result_size = 1); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 78 | *result = '\0'; |
| 79 | |
| 80 | for (start = real_start; start < real_end; start = end + 1) |
| 81 | { |
| 82 | gcd = strlen (array[start]); |
| 83 | for (end = start + 1; end < real_end; end++) |
| 84 | { |
| 85 | int temp; |
| 86 | |
| 87 | temp = string_gcd (array[start], array[end]); |
| 88 | |
| 89 | if (temp <= gcd_zero) |
| 90 | break; |
| 91 | |
| 92 | gcd = temp; |
| 93 | } |
| 94 | end--; |
| 95 | |
| 96 | if (gcd_zero == 0 && start == real_start && end != (real_end - 1)) |
| 97 | { |
| 98 | /* In this case, add in a leading '{', because we are at |
| 99 | top level, and there isn't a consistent prefix. */ |
| 100 | result_size += 1; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 101 | result = xrealloc (result, result_size); |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame^] | 102 | result[0] = '{'; result[1] = '\0'; |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 103 | flag++; |
| 104 | } |
| 105 | |
| 106 | if (start == end) |
| 107 | subterm = savestring (array[start] + gcd_zero); |
| 108 | else |
| 109 | { |
| 110 | /* If there is more than one element in the subarray, |
| 111 | insert the prefix and an opening brace. */ |
| 112 | result_size += gcd - gcd_zero + 1; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 113 | result = xrealloc (result, result_size); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 114 | strncat (result, array[start] + gcd_zero, gcd - gcd_zero); |
| 115 | strcat (result, "{"); |
| 116 | subterm = really_munge_braces (array, start, end + 1, gcd); |
| 117 | subterm[strlen (subterm) - 1] = '}'; |
| 118 | } |
| 119 | |
| 120 | result_size += strlen (subterm) + 1; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 121 | result = xrealloc (result, result_size); |
Jari Aalto | 726f638 | 1996-08-26 18:22:31 +0000 | [diff] [blame] | 122 | strcat (result, subterm); |
| 123 | strcat (result, ","); |
| 124 | free (subterm); |
| 125 | } |
| 126 | |
| 127 | if (gcd_zero == 0) |
| 128 | result[strlen (result) - 1] = flag ? '}' : '\0'; |
| 129 | return (result); |
| 130 | } |
| 131 | |
| 132 | static void |
| 133 | hack_braces_completion (names) |
| 134 | char **names; |
| 135 | { |
| 136 | register int i; |
| 137 | char *temp; |
| 138 | |
| 139 | temp = really_munge_braces (names, 1, array_len (names), 0); |
| 140 | |
| 141 | for (i = 0; names[i]; ++i) |
| 142 | { |
| 143 | free (names[i]); |
| 144 | names[i] = NULL; |
| 145 | } |
| 146 | names[0] = temp; |
| 147 | } |
| 148 | |
| 149 | void |
| 150 | bash_brace_completion () |
| 151 | { |
| 152 | Function *orig_ignore_func; |
| 153 | Function *orig_entry_func; |
| 154 | CPPFunction *orig_attempt_func; |
| 155 | |
| 156 | orig_ignore_func = rl_ignore_some_completions_function; |
| 157 | orig_attempt_func = rl_attempted_completion_function; |
| 158 | orig_entry_func = rl_completion_entry_function; |
| 159 | |
| 160 | rl_completion_entry_function = (Function *) filename_completion_function; |
| 161 | rl_attempted_completion_function = NULL; |
| 162 | rl_ignore_some_completions_function = (Function *) hack_braces_completion; |
| 163 | |
| 164 | rl_complete_internal (TAB); |
| 165 | |
| 166 | rl_ignore_some_completions_function = orig_ignore_func; |
| 167 | rl_attempted_completion_function = orig_attempt_func; |
| 168 | rl_completion_entry_function = orig_entry_func; |
| 169 | } |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 170 | #endif /* BRACE_EXPANSION && READLINE */ |