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90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/* Functions specific to PC operating systems
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Copyright 1994, 1995, 1998 Free Software Foundation, Inc.
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This file is part of GNU DIFF.
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GNU DIFF is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU DIFF is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <string.h>
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char *
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filename_lastdirchar (char const *filename)
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{
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char const *last = 0;
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for (; *filename; filename++)
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if (*filename == '/' || *filename == '\\' || (*filename == ':' && !last))
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last = filename;
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return (char *) last;
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}
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/* Place into QUOTED a quoted version of ARG suitable for `system'.
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Return the length of the resulting string (which is not null-terminated).
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If QUOTED is null, return the length without any side effects. */
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size_t
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quote_system_arg (char *quoted, char const *arg)
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{
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int needs_quoting = !*arg || strchr (arg, ' ') || strchr (arg, '\t');
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size_t backslashes = 0;
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size_t len = 0;
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if (needs_quoting)
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{
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if (quoted)
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quoted[len] = '"';
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len++;
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}
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for (;;)
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{
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char c = *arg++;
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switch (c)
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{
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case 0:
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if (needs_quoting)
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{
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if (quoted)
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{
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memset (quoted + len, '\\', backslashes);
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quoted[len + backslashes] = '"';
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}
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len += backslashes + 1;
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}
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return len;
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case '"':
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backslashes++;
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if (quoted)
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memset (quoted + len, '\\', backslashes);
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len += backslashes;
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/* fall through */
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default:
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backslashes = 0;
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break;
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case '\\':
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backslashes++;
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break;
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}
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if (quoted)
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quoted[len] = c;
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len++;
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}
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}
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