1 /* Cumulus: Smart Filesystem Backup to Dumb Servers
3 * Copyright (C) 2007 The Regents of the University of California
4 * Written by Michael Vrable <mvrable@cs.ucsd.edu>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 /* Utility functions for converting various datatypes to text format (and
22 * later, for parsing them back, perhaps). */
28 #include <uuid/uuid.h>
39 /* Perform URI-style escaping of a string. Bytes which cannot be represented
40 * directly are encoded in the form %xx (where "xx" is a string of two
41 * hexadecimal digits). */
42 string uri_encode(const string &in)
46 for (size_t i = 0; i < in.length(); i++) {
47 unsigned char c = in[i];
49 if (c >= '+' && c < 0x7f && c != '@') {
53 sprintf(buf, "%%%02x", c);
61 /* Decoding of strings produced by uri_encode. */
62 string uri_decode(const string &in)
64 char *buf = new char[in.size() + 1];
66 const char *input = in.c_str();
69 while (*input != '\0') {
72 if (isxdigit(input[1]) && isxdigit(input[2])) {
76 *output++ = strtol(hexbuf, NULL, 16);
93 /* Return the string representation of an integer. Will try to produce output
94 * in decimal, hexadecimal, or octal according to base, though this is just
95 * advisory. For negative numbers, will always use decimal. */
96 string encode_int(long long n, int base)
100 if (n >= 0 && base == 16) {
101 sprintf(buf, "0x%llx", n);
105 if (n > 0 && base == 8) {
106 sprintf(buf, "0%llo", n);
110 sprintf(buf, "%lld", n);
114 /* Parse the string representation of an integer. Accepts decimal, octal, and
115 * hexadecimal, just as C would (recognizes the 0 and 0x prefixes). */
116 long long parse_int(const string &s)
118 return strtoll(s.c_str(), NULL, 0);
121 /* Mark a file descriptor as close-on-exec. */
124 long flags = fcntl(fd, F_GETFD);
129 fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
132 /* Report a fatal error and exit. */
133 void fatal(string msg)
135 fprintf(stderr, "FATAL: %s\n", msg.c_str());