1 /* Cumulus: Efficient Filesystem Backup to the Cloud
2 * Copyright (C) 2007-2008 The Cumulus Developers
3 * See the AUTHORS file for a list of contributors.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 /* Utility functions for converting various datatypes to text format (and
21 * later, for parsing them back, perhaps). */
28 #include <uuid/uuid.h>
41 /* Like sprintf, but returns the output as an allocated string. */
42 string string_printf(const char *fmt, ...)
49 if (vasprintf(&output, fmt, args) < 0) {
50 /* TODO: Error signalling? */
60 /* Perform URI-style escaping of a string. Bytes which cannot be represented
61 * directly are encoded in the form %xx (where "xx" is a string of two
62 * hexadecimal digits). */
63 string uri_encode(const string &in)
67 for (size_t i = 0; i < in.length(); i++) {
68 unsigned char c = in[i];
70 if (c >= '+' && c < 0x7f && c != '@') {
74 sprintf(buf, "%%%02x", c);
82 /* Decoding of strings produced by uri_encode. */
83 string uri_decode(const string &in)
85 char *buf = new char[in.size() + 1];
87 const char *input = in.c_str();
90 while (*input != '\0') {
93 if (isxdigit(input[1]) && isxdigit(input[2])) {
97 *output++ = strtol(hexbuf, NULL, 16);
103 *output++ = *input++;
114 /* Return the string representation of an integer. Will try to produce output
115 * in decimal, hexadecimal, or octal according to base, though this is just
116 * advisory. For negative numbers, will always use decimal. */
117 string encode_int(long long n, int base)
119 if (n >= 0 && base == 16)
120 return string_printf("0x%llx", n);
121 else if (n > 0 && base == 8)
122 return string_printf("0%llo", n);
124 return string_printf("%lld", n);
127 /* Parse the string representation of an integer. Accepts decimal, octal, and
128 * hexadecimal, just as C would (recognizes the 0 and 0x prefixes). */
129 long long parse_int(const string &s)
131 return strtoll(s.c_str(), NULL, 0);
134 /* Mark a file descriptor as close-on-exec. */
137 long flags = fcntl(fd, F_GETFD);
142 fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
145 /* Report a fatal error and exit. */
146 void fatal(string msg)
148 fprintf(stderr, "FATAL: %s\n", msg.c_str());
152 /* Available time formats. */
153 const char TimeFormat::FORMAT_FILENAME[] = "%Y%m%dT%H%M%S";
154 const char TimeFormat::FORMAT_ISO8601[] = "%Y-%m-%d %H:%M:%S";
155 const char TimeFormat::FORMAT_LOCALTIME[] = "%Y-%m-%d %H:%M:%S %z";
157 static size_t MAX_TIMESTAMP_LENGTH = 1024;
159 std::string TimeFormat::format(time_t timestamp, const char *format, bool utc)
164 gmtime_r(×tamp, &time_buf);
166 localtime_r(×tamp, &time_buf);
168 char buffer[MAX_TIMESTAMP_LENGTH];
169 strftime(buffer, MAX_TIMESTAMP_LENGTH, format, &time_buf);
170 return string(buffer);