GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/util/string.cc
Date: 2026-10-04 02:40:33
Exec Total Coverage
Lines: 319 332 96.1%
Branches: 273 392 69.6%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 *
4 * Some common functions.
5 */
6
7 #include "string.h"
8
9 #include <cctype>
10 #include <cstdio>
11 #include <cstdlib>
12 #include <cstring>
13 #include <ctime>
14 #include <algorithm>
15 #include <vector>
16 #include <map>
17 #include <stdio.h>
18 #include <errno.h>
19 #include <fcntl.h>
20 #include <inttypes.h>
21 #include <stdint.h>
22 #include <time.h>
23 #include <string>
24 #include <unistd.h>
25
26
27 using namespace std; // NOLINT
28
29 #ifdef CVMFS_NAMESPACE_GUARD
30 namespace CVMFS_NAMESPACE_GUARD {
31 #endif
32
33 const char b64_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
34 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
35 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
36 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
37 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2',
38 '3', '4', '5', '6', '7', '8', '9', '+', '/'};
39
40 /**
41 * Decode Base64 and Base64Url
42 */
43 const int8_t db64_table[] = {
44 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
45 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
46 -1, -1, -1, -1, -1, 62, -1, 62, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60,
47 61, -1, -1, -1, 0, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
48 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1,
49 63, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
50 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
51
52 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
53 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
54 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
55 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
56 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
57 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
58 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
59 };
60
61 namespace {
62
63 /**
64 * Used for cas insensitive HasSuffix
65 */
66 struct IgnoreCaseComperator {
67 9870 IgnoreCaseComperator() { }
68 188 bool operator()(const std::string::value_type a,
69 const std::string::value_type b) const {
70 188 return std::tolower(a) == std::tolower(b);
71 }
72 };
73
74 } // anonymous namespace
75
76
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 1756 string StringifyBool(const bool value) { return value ? "yes" : "no"; }
77
78 17277997 string StringifyInt(const int64_t value) {
79 char buffer[48];
80 17277997 snprintf(buffer, sizeof(buffer), "%" PRId64, value);
81
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 17277997 return string(buffer);
82 }
83
84 4400173 std::string StringifyUint(const uint64_t value) {
85 char buffer[48];
86 4400173 snprintf(buffer, sizeof(buffer), "%" PRIu64, value);
87
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 4400173 return string(buffer);
88 }
89
90 116 string StringifyByteAsHex(const unsigned char value) {
91 char buffer[3];
92 116 snprintf(buffer, sizeof(buffer), "%02x", value);
93
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 116 return string(buffer);
94 }
95
96 142 string StringifyDouble(const double value) {
97 char buffer[64];
98 142 snprintf(buffer, sizeof(buffer), "%.03f", value);
99
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 142 return string(buffer);
100 }
101
102 /**
103 * Converts seconds since UTC 0 into something readable
104 */
105 466 string StringifyTime(const time_t seconds, const bool utc) {
106 struct tm timestamp;
107
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 466 if (utc) {
108 254 localtime_r(&seconds, &timestamp);
109 } else {
110 212 gmtime_r(&seconds, &timestamp);
111 }
112
113 466 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
114 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
115 char buffer[21];
116 466 snprintf(buffer, sizeof(buffer), "%d %s %d %02d:%02d:%02d", timestamp.tm_mday,
117 466 months[timestamp.tm_mon], timestamp.tm_year + 1900,
118 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
119
120
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 466 return string(buffer);
121 }
122
123 /**
124 * Converts seconds since UTC 0 into something like 12 Sep 14:59:37 CDT
125 */
126 343 string StringifyLocalTime(const time_t seconds) {
127 struct tm timestamp;
128 343 localtime_r(&seconds, &timestamp);
129
130 343 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
131 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
132 char buffer[26];
133 (void)/* cast to void ignores return and placates clang-tidy */
134 343 snprintf(buffer, sizeof(buffer), "%d %s %d %02d:%02d:%02d %s",
135 343 timestamp.tm_mday, months[timestamp.tm_mon],
136 343 timestamp.tm_year + 1900, timestamp.tm_hour, timestamp.tm_min,
137 timestamp.tm_sec, timestamp.tm_zone);
138
139
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 343 return string(buffer);
140 }
141
142
143 /**
144 * Current time in format Wed, 01 Mar 2006 12:00:00 GMT
145 */
146 20924 std::string RfcTimestamp() {
147 20924 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
148 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
149 20924 const char *day_of_week[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
150
151 struct tm timestamp;
152 20924 const time_t now = time(NULL);
153 20924 gmtime_r(&now, &timestamp);
154
155 char buffer[30];
156 20924 snprintf(buffer, sizeof(buffer), "%s, %02d %s %d %02d:%02d:%02d %s",
157 20924 day_of_week[timestamp.tm_wday], timestamp.tm_mday,
158 20924 months[timestamp.tm_mon], timestamp.tm_year + 1900,
159 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec,
160 timestamp.tm_zone);
161
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 20924 return string(buffer);
162 }
163
164
165 /**
166 * Current time in format YYYYMMDDTHHMMSSZ. Used in AWS4 requests.
167 */
168 26 std::string IsoTimestamp() {
169 struct tm timestamp;
170 26 const time_t now = time(NULL);
171 26 gmtime_r(&now, &timestamp);
172
173 char buffer[17];
174 26 snprintf(buffer, sizeof(buffer), "%04d%02d%02dT%02d%02d%02dZ",
175 26 timestamp.tm_year + 1900, timestamp.tm_mon + 1, timestamp.tm_mday,
176 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
177
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 26 return string(buffer);
178 }
179
180
181 /**
182 * UTC time in format YYYYMMDDHHMMSS. Used in cvmfs whitelists.
183 */
184 57 std::string WhitelistTimestamp(time_t when) {
185 struct tm timestamp;
186 57 gmtime_r(&when, &timestamp);
187
188 char buffer[15];
189 57 snprintf(buffer, sizeof(buffer), "%04d%02d%02d%02d%02d%02d",
190 57 timestamp.tm_year + 1900, timestamp.tm_mon + 1, timestamp.tm_mday,
191 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
192
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 57 return string(buffer);
193 }
194
195
196 2235861 string StringifyTimeval(const timeval value) {
197 char buffer[64];
198 2235861 int64_t msec = value.tv_sec * 1000;
199 2235861 msec += value.tv_usec / 1000;
200 2235861 snprintf(buffer, sizeof(buffer), "%" PRId64 ".%03d", msec,
201 2235861 static_cast<int>(value.tv_usec % 1000));
202
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 2235861 return string(buffer);
203 }
204
205 /**
206 * Parses a timestamp of the form YYYY-MM-DDTHH:MM:SSZ
207 * Return 0 on error
208 */
209 783 time_t IsoTimestamp2UtcTime(const std::string &iso8601) {
210 783 time_t utc_time = 0;
211 783 const unsigned length = iso8601.length();
212
213
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 783 if (length != 20)
214 58 return utc_time;
215
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 1450 if ((iso8601[4] != '-') || (iso8601[7] != '-') || (iso8601[10] != 'T')
216
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 1450 || (iso8601[13] != ':') || (iso8601[16] != ':') || (iso8601[19] != 'Z')) {
217 ✗ return utc_time;
218 }
219
220 struct tm tm_wl;
221 725 memset(&tm_wl, 0, sizeof(struct tm));
222
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 725 tm_wl.tm_year = static_cast<int>(String2Int64(iso8601.substr(0, 4))) - 1900;
223
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 725 tm_wl.tm_mon = static_cast<int>(String2Int64(iso8601.substr(5, 2))) - 1;
224
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 725 tm_wl.tm_mday = static_cast<int>(String2Int64(iso8601.substr(8, 2)));
225
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 725 tm_wl.tm_hour = static_cast<int>(String2Int64(iso8601.substr(11, 2)));
226
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 725 tm_wl.tm_min = static_cast<int>(String2Int64(iso8601.substr(14, 2)));
227
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 725 tm_wl.tm_sec = static_cast<int>(String2Int64(iso8601.substr(17, 2)));
228 725 utc_time = timegm(&tm_wl);
229
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 725 if (utc_time < 0)
230 29 return 0;
231
232 696 return utc_time;
233 }
234
235 13861 int64_t String2Int64(const string &value) {
236 int64_t result;
237 13861 sscanf(value.c_str(), "%" PRId64, &result);
238 13861 return result;
239 }
240
241 134050 uint64_t String2Uint64(const string &value) {
242 uint64_t result;
243
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 134050 if (sscanf(value.c_str(), "%" PRIu64, &result) == 1) {
244 133878 return result;
245 }
246 172 return 0;
247 }
248
249 /**
250 * Parse a string into a a uint64_t.
251 *
252 * Unlike String2Uint64, this:
253 * - Checks to make sure the full string is parsed
254 * - Can indicate an error occurred.
255 *
256 * If an error occurs, this returns false and sets errno appropriately.
257 */
258 4570 bool String2Uint64Parse(const std::string &value, uint64_t *result) {
259 4570 char *endptr = NULL;
260 4570 errno = 0;
261 4570 long long myval = strtoll(value.c_str(), &endptr, 10); // NOLINT
262
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 8927 if ((value.size() == 0) || (endptr != (value.c_str() + value.size()))
263
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 8927 || (myval < 0)) {
264 1084 errno = EINVAL;
265 1084 return false;
266 }
267
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 3486 if (errno) {
268 ✗ return false;
269 }
270
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 3486 if (result) {
271 3457 *result = myval;
272 }
273 3486 return true;
274 }
275
276 116 void String2Uint64Pair(const string &value, uint64_t *a, uint64_t *b) {
277 116 sscanf(value.c_str(), "%" PRIu64 " %" PRIu64, a, b);
278 116 }
279
280 125368 bool HasPrefix(const string &str, const string &prefix,
281 const bool ignore_case) {
282
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 125368 if (prefix.length() > str.length())
283 24693 return false;
284
285
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 394437 for (unsigned i = 0, l = prefix.length(); i < l; ++i) {
286
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 363886 if (ignore_case) {
287
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 63718 if (toupper(str[i]) != toupper(prefix[i]))
288 37997 return false;
289 } else {
290
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 300168 if (str[i] != prefix[i])
291 32127 return false;
292 }
293 }
294 30551 return true;
295 }
296
297 10013 bool HasSuffix(const std::string &str, const std::string &suffix,
298 const bool ignore_case) {
299
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 10013 if (suffix.size() > str.size())
300 143 return false;
301 9870 const IgnoreCaseComperator icmp;
302 return (ignore_case)
303
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 9870 ? std::equal(suffix.rbegin(), suffix.rend(), str.rbegin(), icmp)
304
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 9870 : std::equal(suffix.rbegin(), suffix.rend(), str.rbegin());
305 }
306
307 32178 vector<string> SplitString(const string &str, char delim) {
308 32178 return SplitStringBounded(0, str, delim);
309 }
310
311 32286 vector<string> SplitStringBounded(unsigned max_chunks, const string &str,
312 char delim) {
313 32286 vector<string> result;
314
315 // edge case... one chunk is always the whole string
316
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 32286 if (1 == max_chunks) {
317
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 18 result.push_back(str);
318 18 return result;
319 }
320
321 // split the string
322 32268 const unsigned size = str.size();
323 32268 unsigned marker = 0;
324 32268 unsigned chunks = 1;
325 unsigned i;
326
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 859270 for (i = 0; i < size; ++i) {
327
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 827038 if (str[i] == delim) {
328
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 42424 result.push_back(str.substr(marker, i - marker));
329 42424 marker = i + 1;
330
331 // we got what we want... good bye
332
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 42424 if (++chunks == max_chunks)
333 36 break;
334 }
335 }
336
337 // push the remainings of the string and return
338
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 32268 result.push_back(str.substr(marker));
339 32268 return result;
340 }
341
342 222 vector<string> SplitStringMultiChar(const string &str, const string &delim) {
343 222 size_t pos_start = 0, pos_end = 0, delim_len = delim.length();
344 222 std::string substring;
345 222 std::vector<std::string> result;
346
347
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 576 while ((pos_end = str.find(delim, pos_start)) != string::npos) {
348
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 354 substring = str.substr(pos_start, pos_end - pos_start);
349 354 pos_start = pos_end + delim_len;
350
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 354 result.push_back(substring);
351 }
352
353
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 222 result.push_back(str.substr(pos_start));
354 444 return result;
355 222 }
356
357 7662 string JoinStrings(const vector<string> &strings, const string &joint) {
358
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 7662 string result = "";
359 7662 const unsigned size = strings.size();
360
361
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 7662 if (size > 0) {
362
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 5988 result = strings[0];
363
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 7055 for (unsigned i = 1; i < size; ++i)
364
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 1067 result += joint + strings[i];
365 }
366
367 7662 return result;
368 }
369
370 1184 void ParseKeyvalMem(const unsigned char *buffer, const unsigned buffer_size,
371 map<char, string> *content) {
372 1184 string line;
373 1184 unsigned pos = 0;
374
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 82499 while (pos < buffer_size) {
375
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 82469 if (static_cast<char>(buffer[pos]) == '\n') {
376
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 7074 if (line == "--")
377 1154 return;
378
379
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 5920 if (line != "") {
380
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 5920 const string tail = (line.length() == 1) ? "" : line.substr(1);
381 // Special handling of 'Z' key because it can exist multiple times
382
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 5920 if (line[0] != 'Z') {
383
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 5808 (*content)[line[0]] = tail;
384 } else {
385
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 112 if (content->find(line[0]) == content->end()) {
386
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 56 (*content)[line[0]] = tail;
387 } else {
388
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 56 (*content)[line[0]] = (*content)[line[0]] + "|" + tail;
389 }
390 }
391 5920 }
392
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 5920 line = "";
393 } else {
394
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 75395 line += static_cast<char>(buffer[pos]);
395 }
396 81315 pos++;
397 }
398
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 1184 }
399
400 192 bool ParseKeyvalPath(const string &filename, map<char, string> *content) {
401
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 192 const int fd = open(filename.c_str(), O_RDONLY);
402
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 192 if (fd < 0)
403 26 return false;
404
405 unsigned char buffer[4096];
406
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 166 const ssize_t num_bytes = read(fd, buffer, sizeof(buffer));
407
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 166 close(fd);
408
409
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 166 if ((num_bytes <= 0) || (unsigned(num_bytes) >= sizeof(buffer)))
410 26 return false;
411
412
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 140 ParseKeyvalMem(buffer, unsigned(num_bytes), content);
413 140 return true;
414 }
415
416 91267 string GetLineMem(const char *text, const int text_size) {
417 91267 int pos = 0;
418
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 3814356 while ((pos < text_size) && (text[pos] != '\n'))
419 3723089 pos++;
420
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 91267 return string(text, pos);
421 }
422
423 2252253 bool GetLineFile(FILE *f, std::string *line) {
424 int retval;
425 2252253 line->clear();
426 while (true) {
427 160239229 retval = fgetc(f);
428
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 160239229 if (ferror(f) && (errno == EINTR)) {
429 ✗ clearerr(f);
430 ✗ continue;
431
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 160239229 } else if (retval == EOF) {
432 2769 break;
433 }
434 160236460 const char c = static_cast<char>(retval);
435
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 160236460 if (c == '\n')
436 2249484 break;
437 157986976 line->push_back(c);
438 157986976 }
439
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 2252253 return (retval != EOF) || !line->empty();
440 }
441
442 1626 bool GetLineFd(const int fd, std::string *line) {
443 ssize_t retval;
444 char c;
445 1626 line->clear();
446 while (true) {
447
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 107751 retval = read(fd, &c, 1);
448
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 107751 if (retval == 0) {
449 86 break;
450 }
451
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 107665 if ((retval == -1) && (errno == EINTR)) {
452 ✗ continue;
453 }
454
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 107665 if (retval == -1) {
455 ✗ break;
456 }
457
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 107665 if (c == '\n')
458 1540 break;
459
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 106125 line->push_back(c);
460 }
461
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 1626 return (retval == 1) || !line->empty();
462 }
463
464 /**
465 * Removes leading and trailing whitespaces.
466 */
467 28585 string Trim(const string &raw, bool trim_newline) {
468
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 28585 if (raw.empty())
469
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 1597 return "";
470
471 26988 unsigned start_pos = 0;
472 31498 for (; (start_pos < raw.length())
473
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 59069 && (raw[start_pos] == ' ' || raw[start_pos] == '\t'
474
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 27571 || (trim_newline
475
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 10810 && (raw[start_pos] == '\n' || raw[start_pos] == '\r')));
476 ++start_pos) {
477 }
478 26988 unsigned end_pos = raw.length() - 1; // at least one character in raw
479 41161 for (;
480 (end_pos >= start_pos)
481
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 80420 && (raw[end_pos] == ' ' || raw[end_pos] == '\t'
482
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 39259 || (trim_newline && (raw[end_pos] == '\n' || raw[end_pos] == '\r')));
483 --end_pos) {
484 }
485
486 26988 return raw.substr(start_pos, end_pos - start_pos + 1);
487 }
488
489 8 std::string TrimString(const std::string &path,
490 const std::string &toTrim,
491 const int trimMode) {
492 8 std::string trimmed = path;
493
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 8 if (trimmed != toTrim) {
494
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 24 while ((trimMode & kTrimLeading) && HasPrefix(trimmed, toTrim, true)
495
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 36 && (trimmed.size() > toTrim.size())) {
496
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 12 trimmed = trimmed.substr(toTrim.size());
497 }
498
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 20 while ((trimMode & kTrimTrailing) && HasSuffix(trimmed, toTrim, true)
499
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 28 && (trimmed.size() > toTrim.size())) {
500
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 8 trimmed = trimmed.substr(0, trimmed.size() - toTrim.size());
501 }
502 }
503 8 return trimmed;
504 }
505
506 /**
507 * Converts all characters to upper case
508 */
509 875 string ToUpper(const string &mixed_case) {
510 875 string result(mixed_case);
511
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 3500 for (unsigned i = 0, l = result.length(); i < l; ++i) {
512
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 2625 result[i] = static_cast<char>(toupper(result[i]));
513 }
514 875 return result;
515 }
516
517 4734 string ReplaceAll(const string &haystack, const string &needle,
518 const string &replace_by) {
519 4734 string result(haystack);
520 4734 size_t pos = 0;
521 4734 const unsigned needle_size = needle.size();
522
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 4734 if (needle == "")
523 33 return result;
524
525
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 7705 while ((pos = result.find(needle, pos)) != string::npos)
526
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 3004 result.replace(pos, needle_size, replace_by);
527 4701 return result;
528 }
529
530 283786 static inline void Base64Block(const unsigned char input[3], const char *table,
531 char output[4]) {
532 283786 output[0] = table[(input[0] & 0xFD) >> 2];
533 283786 output[1] = table[((input[0] & 0x03) << 4) | ((input[1] & 0xF0) >> 4)];
534 283786 output[2] = table[((input[1] & 0x0F) << 2) | ((input[2] & 0xD0) >> 6)];
535 283786 output[3] = table[input[2] & 0x3F];
536 283786 }
537
538 22631 string Base64(const string &data) {
539 22631 string result;
540
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 22631 result.reserve((data.length() + 3) * 4 / 3);
541 22631 unsigned pos = 0;
542 const unsigned char *data_ptr = reinterpret_cast<const unsigned char *>(
543 22631 data.data());
544 22631 const unsigned length = data.length();
545
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 283984 while (pos + 2 < length) {
546 char encoded_block[4];
547 261353 Base64Block(data_ptr + pos, b64_table, encoded_block);
548
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 261353 result.append(encoded_block, 4);
549 261353 pos += 3;
550 }
551
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 22631 if (length % 3 != 0) {
552 unsigned char input[3];
553 22433 input[0] = data_ptr[pos];
554
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 22433 input[1] = ((length % 3) == 2) ? data_ptr[pos + 1] : 0;
555 22433 input[2] = 0;
556 char encoded_block[4];
557 22433 Base64Block(input, b64_table, encoded_block);
558
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 22433 result.append(encoded_block, 2);
559
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 22433 result.push_back(((length % 3) == 2) ? encoded_block[2] : '=');
560
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 22433 result.push_back('=');
561 }
562
563 22631 return result;
564 }
565
566 /**
567 * Safe encoding for URIs and path names: replace + by - and / by _
568 */
569 52 string Base64Url(const string &data) {
570 52 string base64 = Base64(data);
571
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 2372 for (unsigned i = 0, l = base64.length(); i < l; ++i) {
572
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 2320 if (base64[i] == '+') {
573
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 24 base64[i] = '-';
574
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 2296 } else if (base64[i] == '/') {
575
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 16 base64[i] = '_';
576 }
577 }
578 52 return base64;
579 }
580
581 623695 static bool Debase64Block(const unsigned char input[4],
582 unsigned char output[3]) {
583 int32_t dec[4];
584
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 3118459 for (int i = 0; i < 4; ++i) {
585 2494768 dec[i] = db64_table[input[i]];
586
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 2494768 if (dec[i] < 0)
587 4 return false;
588 }
589
590 623691 output[0] = (dec[0] << 2) | (dec[1] >> 4);
591 623691 output[1] = ((dec[1] & 0x0F) << 4) | (dec[2] >> 2);
592 623691 output[2] = ((dec[2] & 0x03) << 6) | dec[3];
593 623691 return true;
594 }
595
596 /**
597 * Can decode both base64 and base64url
598 */
599 2105 bool Debase64(const string &data, string *decoded) {
600 2105 decoded->clear();
601 2105 decoded->reserve((data.length() + 4) * 3 / 4);
602 2105 unsigned pos = 0;
603 const unsigned char *data_ptr = reinterpret_cast<const unsigned char *>(
604 2105 data.data());
605 2105 const unsigned length = data.length();
606
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 2105 if (length == 0)
607 4 return true;
608
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 2101 if ((length % 4) != 0)
609 8 return false;
610
611
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 625784 while (pos < length) {
612 unsigned char decoded_block[3];
613 623695 const bool retval = Debase64Block(data_ptr + pos, decoded_block);
614
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 623695 if (!retval)
615 4 return false;
616
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 623691 decoded->append(reinterpret_cast<char *>(decoded_block), 3);
617 623691 pos += 4;
618 }
619
620
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 6267 for (int i = 0; i < 2; ++i) {
621 4178 pos--;
622
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 4178 if (data[pos] == '=')
623 675 decoded->erase(decoded->length() - 1);
624 }
625 2089 return true;
626 }
627
628 /**
629 * Assumes that source is terminated by a newline
630 */
631 182 string Tail(const string &source, unsigned num_lines) {
632
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 182 if (source.empty() || (num_lines == 0))
633
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 78 return "";
634
635 104 const int l = static_cast<int>(source.length());
636 104 int i = l - 1;
637
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 494 for (; i >= 0; --i) {
638 416 const char c = source.data()[i];
639
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 416 if (c == '\n') {
640
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 130 if (num_lines == 0) {
641 26 return source.substr(i + 1);
642 }
643 104 num_lines--;
644 }
645 }
646 78 return source;
647 }
648
649 /**
650 * Get UTC Time.
651 *
652 * @param format format if timestamp (YYYY-MM-DD HH:MM:SS by default)
653 * @return a timestamp string on success, empty string on failure
654 */
655 ✗ std::string GetGMTimestamp(const std::string &format) {
656 struct tm time_ptr;
657 char date_and_time[100];
658 ✗ const time_t t = time(NULL);
659 ✗ gmtime_r(&t, &time_ptr); // take UTC
660 // return empty string if formatting fails
661 ✗ if (!strftime(date_and_time, 100, format.c_str(), &time_ptr)) {
662 ✗ return "";
663 }
664 ✗ std::string timestamp(date_and_time);
665 ✗ return timestamp;
666 }
667
668 #ifdef CVMFS_NAMESPACE_GUARD
669 } // namespace CVMFS_NAMESPACE_GUARD
670 #endif
671