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SGI Freeware 1998 November
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fw_GNUbash.idb
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usr
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src
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bash-1.14.6
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bracecomp.c.z
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bracecomp.c
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C/C++ Source or Header
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1998-01-21
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4KB
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167 lines
/* 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 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 2, 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; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <stdio.h>
#if defined (HAVE_STRING_H)
# include <string.h>
#else /* !HAVE_STRING_H */
# include <strings.h>
#endif /* !HAVE_STRING_H */
#include "shell.h"
#include <readline/readline.h>
/* 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;
int result_size, flag;
flag = 0;
if (real_start == real_end)
{
if (array[real_start])
return (savestring (array[real_start] + gcd_zero));
else
return (savestring (array[0]));
}
result = (char *) xmalloc (result_size = 1);
*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);
strcpy (result, "{");
flag++;
}
if (start == end)
subterm = savestring (array[start] + gcd_zero);
else
{
/* If there is more than one element in the subarray,
insert the prefix and an opening brace. */
result_size += gcd - gcd_zero + 1;
result = (char *) xrealloc (result, result_size);
strncat (result, array[start] + gcd_zero, gcd - gcd_zero);
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 void
hack_braces_completion (names)
char **names;
{
register int i;
char *temp;
temp = really_munge_braces (names, 1, array_len (names), 0);
for (i = 0; names[i]; ++i)
{
free (names[i]);
names[i] = NULL;
}
names[0] = temp;
}
void
bash_brace_completion ()
{
Function *orig_ignore_func;
Function *orig_entry_func;
CPPFunction *orig_attempt_func;
orig_ignore_func = rl_ignore_some_completions_function;
orig_attempt_func = rl_attempted_completion_function;
orig_entry_func = rl_completion_entry_function;
rl_completion_entry_function = (Function *) filename_completion_function;
rl_attempted_completion_function = NULL;
rl_ignore_some_completions_function = (Function *) hack_braces_completion;
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;
}