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Diffstat (limited to 'bracecomp.c')
| -rw-r--r-- | bracecomp.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/bracecomp.c b/bracecomp.c new file mode 100644 index 0000000..2ea8ba9 --- /dev/null +++ b/bracecomp.c @@ -0,0 +1,221 @@ +/* bracecomp.c -- Complete a filename with the possible completions enclosed + in csh-style braces such that the list of completions is available to the + shell. */ + +/* Original version by tromey@cns.caltech.edu, Fri Feb 7 1992. */ + +/* Copyright (C) 1993-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#if defined (BRACE_EXPANSION) && defined (READLINE) + +#include <stdio.h> + +#if defined (HAVE_UNISTD_H) +# ifdef _MINIX +# include <sys/types.h> +# endif +# include <unistd.h> +#endif + +#include "bashansi.h" +#include "shmbutil.h" + +#include "shell.h" +#include <readline/readline.h> + +static int _strcompare PARAMS((char **, char **)); + +/* Find greatest common prefix of two strings. */ +static int +string_gcd (s1, s2) + char *s1, *s2; +{ + register int i; + + if (s1 == NULL || s2 == NULL) + return (0); + + for (i = 0; *s1 && *s2; ++s1, ++s2, ++i) + { + if (*s1 != *s2) + break; + } + + return (i); +} + +static char * +really_munge_braces (array, real_start, real_end, gcd_zero) + char **array; + int real_start, real_end, gcd_zero; +{ + int start, end, gcd; + char *result, *subterm, *x; + int result_size, flag, tlen; + + flag = 0; + + if (real_start == real_end) + { + x = array[real_start] ? sh_backslash_quote (array[real_start] + gcd_zero, 0, 0) + : sh_backslash_quote (array[0], 0, 0); + return x; + } + + result = (char *)xmalloc (result_size = 16); + *result = '\0'; + + for (start = real_start; start < real_end; start = end + 1) + { + gcd = strlen (array[start]); + for (end = start + 1; end < real_end; end++) + { + int temp; + + temp = string_gcd (array[start], array[end]); + + if (temp <= gcd_zero) + break; + + gcd = temp; + } + end--; + + if (gcd_zero == 0 && start == real_start && end != (real_end - 1)) + { + /* In this case, add in a leading '{', because we are at + top level, and there isn't a consistent prefix. */ + result_size += 1; + result = (char *)xrealloc (result, result_size); + result[0] = '{'; result[1] = '\0'; + flag++; + } + + /* Make sure we backslash quote every substring we insert into the + resultant brace expression. This is so the default filename + quoting function won't inappropriately quote the braces. */ + if (start == end) + { + x = savestring (array[start] + gcd_zero); + subterm = sh_backslash_quote (x, 0, 0); + free (x); + } + else + { + /* If there is more than one element in the subarray, + insert the (quoted) prefix and an opening brace. */ + tlen = gcd - gcd_zero; + x = (char *)xmalloc (tlen + 1); + strncpy (x, array[start] + gcd_zero, tlen); + x[tlen] = '\0'; + subterm = sh_backslash_quote (x, 0, 0); + free (x); + result_size += strlen (subterm) + 1; + result = (char *)xrealloc (result, result_size); + strcat (result, subterm); + free (subterm); + strcat (result, "{"); + subterm = really_munge_braces (array, start, end + 1, gcd); + subterm[strlen (subterm) - 1] = '}'; + } + + result_size += strlen (subterm) + 1; + result = (char *)xrealloc (result, result_size); + strcat (result, subterm); + strcat (result, ","); + free (subterm); + } + + if (gcd_zero == 0) + result[strlen (result) - 1] = flag ? '}' : '\0'; + return (result); +} + +static int +_strcompare (s1, s2) + char **s1, **s2; +{ + int result; + + result = **s1 - **s2; + if (result == 0) + result = strcmp (*s1, *s2); + + return result; +} + +static int +hack_braces_completion (names) + char **names; +{ + register int i; + char *temp; + + i = strvec_len (names); + if (MB_CUR_MAX > 1 && i > 2) + qsort (names+1, i-1, sizeof (char *), (QSFUNC *)_strcompare); + + temp = really_munge_braces (names, 1, i, 0); + + for (i = 0; names[i]; ++i) + { + free (names[i]); + names[i] = NULL; + } + names[0] = temp; + return 0; +} + +/* We handle quoting ourselves within hack_braces_completion, so we turn off + rl_filename_quoting_desired and rl_filename_quoting_function. */ +int +bash_brace_completion (count, ignore) + int count, ignore; +{ + rl_compignore_func_t *orig_ignore_func; + rl_compentry_func_t *orig_entry_func; + rl_quote_func_t *orig_quoting_func; + rl_completion_func_t *orig_attempt_func; + int orig_quoting_desired, r; + + orig_ignore_func = rl_ignore_some_completions_function; + orig_attempt_func = rl_attempted_completion_function; + orig_entry_func = rl_completion_entry_function; + orig_quoting_func = rl_filename_quoting_function; + orig_quoting_desired = rl_filename_quoting_desired; + + rl_completion_entry_function = rl_filename_completion_function; + rl_attempted_completion_function = (rl_completion_func_t *)NULL; + rl_ignore_some_completions_function = hack_braces_completion; + rl_filename_quoting_function = (rl_quote_func_t *)NULL; + rl_filename_quoting_desired = 0; + + r = rl_complete_internal (TAB); + + rl_ignore_some_completions_function = orig_ignore_func; + rl_attempted_completion_function = orig_attempt_func; + rl_completion_entry_function = orig_entry_func; + rl_filename_quoting_function = orig_quoting_func; + rl_filename_quoting_desired = orig_quoting_desired; + + return r; +} +#endif /* BRACE_EXPANSION && READLINE */ |