GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/util/string.cc
Date: 2025-09-28 02:35:26
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 #ifndef __STDC_FORMAT_MACROS
8 // NOLINTNEXTLINE
9 #define __STDC_FORMAT_MACROS
10 #endif
11
12 #include "string.h"
13
14 #include <cctype>
15 #include <cstdio>
16 #include <cstdlib>
17 #include <cstring>
18 #include <ctime>
19 #include <algorithm>
20 #include <vector>
21 #include <map>
22 #include <stdio.h>
23 #include <errno.h>
24 #include <fcntl.h>
25 #include <inttypes.h>
26 #include <stdint.h>
27 #include <time.h>
28 #include <string>
29 #include <unistd.h>
30
31
32 using namespace std; // NOLINT
33
34 #ifdef CVMFS_NAMESPACE_GUARD
35 namespace CVMFS_NAMESPACE_GUARD {
36 #endif
37
38 const char b64_table[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
39 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
40 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
41 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
42 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2',
43 '3', '4', '5', '6', '7', '8', '9', '+', '/'};
44
45 /**
46 * Decode Base64 and Base64Url
47 */
48 const int8_t db64_table[] = {
49 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
50 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
51 -1, -1, -1, -1, -1, 62, -1, 62, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60,
52 61, -1, -1, -1, 0, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
53 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1,
54 63, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
55 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1,
56
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, -1, -1, -1, -1, -1,
59 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
60 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
61 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
62 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
63 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
64 };
65
66 namespace {
67
68 /**
69 * Used for cas insensitive HasSuffix
70 */
71 struct IgnoreCaseComperator {
72 3254 IgnoreCaseComperator() { }
73 715 bool operator()(const std::string::value_type a,
74 const std::string::value_type b) const {
75 715 return std::tolower(a) == std::tolower(b);
76 }
77 };
78
79 } // anonymous namespace
80
81
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 1950 string StringifyBool(const bool value) { return value ? "yes" : "no"; }
82
83 15714416 string StringifyInt(const int64_t value) {
84 char buffer[48];
85 15714416 snprintf(buffer, sizeof(buffer), "%" PRId64, value);
86
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 15714416 return string(buffer);
87 }
88
89 17962730 std::string StringifyUint(const uint64_t value) {
90 char buffer[48];
91 17962730 snprintf(buffer, sizeof(buffer), "%" PRIu64, value);
92
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 17962730 return string(buffer);
93 }
94
95 76 string StringifyByteAsHex(const unsigned char value) {
96 char buffer[3];
97 76 snprintf(buffer, sizeof(buffer), "%02x", value);
98
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 76 return string(buffer);
99 }
100
101 216 string StringifyDouble(const double value) {
102 char buffer[64];
103 216 snprintf(buffer, sizeof(buffer), "%.03f", value);
104
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 216 return string(buffer);
105 }
106
107 /**
108 * Converts seconds since UTC 0 into something readable
109 */
110 831 string StringifyTime(const time_t seconds, const bool utc) {
111 struct tm timestamp;
112
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 831 if (utc) {
113 461 localtime_r(&seconds, &timestamp);
114 } else {
115 370 gmtime_r(&seconds, &timestamp);
116 }
117
118 831 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
119 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
120 char buffer[21];
121 831 snprintf(buffer, sizeof(buffer), "%d %s %d %02d:%02d:%02d", timestamp.tm_mday,
122 831 months[timestamp.tm_mon], timestamp.tm_year + 1900,
123 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
124
125
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 831 return string(buffer);
126 }
127
128 /**
129 * Converts seconds since UTC 0 into something like 12 Sep 14:59:37 CDT
130 */
131 40 string StringifyLocalTime(const time_t seconds) {
132 struct tm timestamp;
133 40 localtime_r(&seconds, &timestamp);
134
135 40 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
136 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
137 char buffer[26];
138 (void)/* cast to void ignores return and placates clang-tidy */
139 40 snprintf(buffer, sizeof(buffer), "%d %s %d %02d:%02d:%02d %s",
140 40 timestamp.tm_mday, months[timestamp.tm_mon],
141 40 timestamp.tm_year + 1900, timestamp.tm_hour, timestamp.tm_min,
142 timestamp.tm_sec, timestamp.tm_zone);
143
144
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 40 return string(buffer);
145 }
146
147
148 /**
149 * Current time in format Wed, 01 Mar 2006 12:00:00 GMT
150 */
151 7930 std::string RfcTimestamp() {
152 7930 const char *months[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
153 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
154 7930 const char *day_of_week[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
155
156 struct tm timestamp;
157 7930 const time_t now = time(NULL);
158 7930 gmtime_r(&now, &timestamp);
159
160 char buffer[30];
161 7930 snprintf(buffer, sizeof(buffer), "%s, %02d %s %d %02d:%02d:%02d %s",
162 7930 day_of_week[timestamp.tm_wday], timestamp.tm_mday,
163 7930 months[timestamp.tm_mon], timestamp.tm_year + 1900,
164 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec,
165 timestamp.tm_zone);
166
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 7930 return string(buffer);
167 }
168
169
170 /**
171 * Current time in format YYYYMMDDTHHMMSSZ. Used in AWS4 requests.
172 */
173 21 std::string IsoTimestamp() {
174 struct tm timestamp;
175 21 const time_t now = time(NULL);
176 21 gmtime_r(&now, &timestamp);
177
178 char buffer[17];
179 21 snprintf(buffer, sizeof(buffer), "%04d%02d%02dT%02d%02d%02dZ",
180 21 timestamp.tm_year + 1900, timestamp.tm_mon + 1, timestamp.tm_mday,
181 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
182
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 21 return string(buffer);
183 }
184
185
186 /**
187 * UTC time in format YYYYMMDDHHMMSS. Used in cvmfs whitelists.
188 */
189 44 std::string WhitelistTimestamp(time_t when) {
190 struct tm timestamp;
191 44 gmtime_r(&when, &timestamp);
192
193 char buffer[15];
194 44 snprintf(buffer, sizeof(buffer), "%04d%02d%02d%02d%02d%02d",
195 44 timestamp.tm_year + 1900, timestamp.tm_mon + 1, timestamp.tm_mday,
196 timestamp.tm_hour, timestamp.tm_min, timestamp.tm_sec);
197
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 44 return string(buffer);
198 }
199
200
201 1117947 string StringifyTimeval(const timeval value) {
202 char buffer[64];
203 1117947 int64_t msec = value.tv_sec * 1000;
204 1117947 msec += value.tv_usec / 1000;
205 1117947 snprintf(buffer, sizeof(buffer), "%" PRId64 ".%03d", msec,
206 1117947 static_cast<int>(value.tv_usec % 1000));
207
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 1117947 return string(buffer);
208 }
209
210 /**
211 * Parses a timestamp of the form YYYY-MM-DDTHH:MM:SSZ
212 * Return 0 on error
213 */
214 387 time_t IsoTimestamp2UtcTime(const std::string &iso8601) {
215 387 time_t utc_time = 0;
216 387 const unsigned length = iso8601.length();
217
218
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 387 if (length != 20)
219 40 return utc_time;
220
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 694 if ((iso8601[4] != '-') || (iso8601[7] != '-') || (iso8601[10] != 'T')
221
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 694 || (iso8601[13] != ':') || (iso8601[16] != ':') || (iso8601[19] != 'Z')) {
222 ✗ return utc_time;
223 }
224
225 struct tm tm_wl;
226 347 memset(&tm_wl, 0, sizeof(struct tm));
227
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 347 tm_wl.tm_year = static_cast<int>(String2Int64(iso8601.substr(0, 4))) - 1900;
228
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 347 tm_wl.tm_mon = static_cast<int>(String2Int64(iso8601.substr(5, 2))) - 1;
229
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 347 tm_wl.tm_mday = static_cast<int>(String2Int64(iso8601.substr(8, 2)));
230
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 347 tm_wl.tm_hour = static_cast<int>(String2Int64(iso8601.substr(11, 2)));
231
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 347 tm_wl.tm_min = static_cast<int>(String2Int64(iso8601.substr(14, 2)));
232
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 347 tm_wl.tm_sec = static_cast<int>(String2Int64(iso8601.substr(17, 2)));
233 347 utc_time = timegm(&tm_wl);
234
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 347 if (utc_time < 0)
235 20 return 0;
236
237 327 return utc_time;
238 }
239
240 4989 int64_t String2Int64(const string &value) {
241 int64_t result;
242 4989 sscanf(value.c_str(), "%" PRId64, &result);
243 4989 return result;
244 }
245
246 290355 uint64_t String2Uint64(const string &value) {
247 uint64_t result;
248
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 290355 if (sscanf(value.c_str(), "%" PRIu64, &result) == 1) {
249 290191 return result;
250 }
251 164 return 0;
252 }
253
254 /**
255 * Parse a string into a a uint64_t.
256 *
257 * Unlike String2Uint64, this:
258 * - Checks to make sure the full string is parsed
259 * - Can indicate an error occurred.
260 *
261 * If an error occurs, this returns false and sets errno appropriately.
262 */
263 3858 bool String2Uint64Parse(const std::string &value, uint64_t *result) {
264 3858 char *endptr = NULL;
265 3858 errno = 0;
266 3858 long long myval = strtoll(value.c_str(), &endptr, 10); // NOLINT
267
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 7675 if ((value.size() == 0) || (endptr != (value.c_str() + value.size()))
268
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 7675 || (myval < 0)) {
269 505 errno = EINVAL;
270 505 return false;
271 }
272
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 3353 if (errno) {
273 ✗ return false;
274 }
275
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 3353 if (result) {
276 3340 *result = myval;
277 }
278 3353 return true;
279 }
280
281 68 void String2Uint64Pair(const string &value, uint64_t *a, uint64_t *b) {
282 68 sscanf(value.c_str(), "%" PRIu64 " %" PRIu64, a, b);
283 68 }
284
285 76197 bool HasPrefix(const string &str, const string &prefix,
286 const bool ignore_case) {
287
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 76197 if (prefix.length() > str.length())
288 5475 return false;
289
290
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 160456 for (unsigned i = 0, l = prefix.length(); i < l; ++i) {
291
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 152601 if (ignore_case) {
292
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 80090 if (toupper(str[i]) != toupper(prefix[i]))
293 47975 return false;
294 } else {
295
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 72511 if (str[i] != prefix[i])
296 14892 return false;
297 }
298 }
299 7855 return true;
300 }
301
302 3480 bool HasSuffix(const std::string &str, const std::string &suffix,
303 const bool ignore_case) {
304
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 3480 if (suffix.size() > str.size())
305 226 return false;
306 3254 const IgnoreCaseComperator icmp;
307 return (ignore_case)
308
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 3254 ? std::equal(suffix.rbegin(), suffix.rend(), str.rbegin(), icmp)
309
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 3254 : std::equal(suffix.rbegin(), suffix.rend(), str.rbegin());
310 }
311
312 24132 vector<string> SplitString(const string &str, char delim) {
313 24132 return SplitStringBounded(0, str, delim);
314 }
315
316 24192 vector<string> SplitStringBounded(unsigned max_chunks, const string &str,
317 char delim) {
318 24192 vector<string> result;
319
320 // edge case... one chunk is always the whole string
321
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 24192 if (1 == max_chunks) {
322
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 10 result.push_back(str);
323 10 return result;
324 }
325
326 // split the string
327 24182 const unsigned size = str.size();
328 24182 unsigned marker = 0;
329 24182 unsigned chunks = 1;
330 unsigned i;
331
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 606192 for (i = 0; i < size; ++i) {
332
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 582030 if (str[i] == delim) {
333
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 40780 result.push_back(str.substr(marker, i - marker));
334 40780 marker = i + 1;
335
336 // we got what we want... good bye
337
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 40780 if (++chunks == max_chunks)
338 20 break;
339 }
340 }
341
342 // push the remainings of the string and return
343
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 24182 result.push_back(str.substr(marker));
344 24182 return result;
345 }
346
347 30 vector<string> SplitStringMultiChar(const string &str, const string &delim) {
348 30 size_t pos_start = 0, pos_end = 0, delim_len = delim.length();
349 30 std::string substring;
350 30 std::vector<std::string> result;
351
352
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 140 while ((pos_end = str.find(delim, pos_start)) != string::npos) {
353
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 110 substring = str.substr(pos_start, pos_end - pos_start);
354 110 pos_start = pos_end + delim_len;
355
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 110 result.push_back(substring);
356 }
357
358
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 30 result.push_back(str.substr(pos_start));
359 60 return result;
360 30 }
361
362 4328 string JoinStrings(const vector<string> &strings, const string &joint) {
363
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 4328 string result = "";
364 4328 const unsigned size = strings.size();
365
366
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 4328 if (size > 0) {
367
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 3867 result = strings[0];
368
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 4399 for (unsigned i = 1; i < size; ++i)
369
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 532 result += joint + strings[i];
370 }
371
372 4328 return result;
373 }
374
375 3386 void ParseKeyvalMem(const unsigned char *buffer, const unsigned buffer_size,
376 map<char, string> *content) {
377 3386 string line;
378 3386 unsigned pos = 0;
379
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 164174 while (pos < buffer_size) {
380
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 164076 if (static_cast<char>(buffer[pos]) == '\n') {
381
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 17382 if (line == "--")
382 3288 return;
383
384
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 14094 if (line != "") {
385
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 14094 const string tail = (line.length() == 1) ? "" : line.substr(1);
386 // Special handling of 'Z' key because it can exist multiple times
387
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 14094 if (line[0] != 'Z') {
388
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 14016 (*content)[line[0]] = tail;
389 } else {
390
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 78 if (content->find(line[0]) == content->end()) {
391
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 39 (*content)[line[0]] = tail;
392 } else {
393
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 39 (*content)[line[0]] = (*content)[line[0]] + "|" + tail;
394 }
395 }
396 14094 }
397
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 14094 line = "";
398 } else {
399
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 146694 line += static_cast<char>(buffer[pos]);
400 }
401 160788 pos++;
402 }
403
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 3386 }
404
405 165 bool ParseKeyvalPath(const string &filename, map<char, string> *content) {
406
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 165 const int fd = open(filename.c_str(), O_RDONLY);
407
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 165 if (fd < 0)
408 20 return false;
409
410 unsigned char buffer[4096];
411
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 145 const ssize_t num_bytes = read(fd, buffer, sizeof(buffer));
412
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 145 close(fd);
413
414
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 145 if ((num_bytes <= 0) || (unsigned(num_bytes) >= sizeof(buffer)))
415 20 return false;
416
417
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 125 ParseKeyvalMem(buffer, unsigned(num_bytes), content);
418 125 return true;
419 }
420
421 250127 string GetLineMem(const char *text, const int text_size) {
422 250127 int pos = 0;
423
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 10584484 while ((pos < text_size) && (text[pos] != '\n'))
424 10334357 pos++;
425
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 250127 return string(text, pos);
426 }
427
428 1131071 bool GetLineFile(FILE *f, std::string *line) {
429 int retval;
430 1131071 line->clear();
431 while (true) {
432 80153684 retval = fgetc(f);
433
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 80153684 if (ferror(f) && (errno == EINTR)) {
434 ✗ clearerr(f);
435 ✗ continue;
436
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 80153684 } else if (retval == EOF) {
437 2969 break;
438 }
439 80150715 const char c = static_cast<char>(retval);
440
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 80150715 if (c == '\n')
441 1128102 break;
442 79022613 line->push_back(c);
443 79022613 }
444
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 1131071 return (retval != EOF) || !line->empty();
445 }
446
447 299 bool GetLineFd(const int fd, std::string *line) {
448 ssize_t retval;
449 char c;
450 299 line->clear();
451 while (true) {
452
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 11385 retval = read(fd, &c, 1);
453
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 11385 if (retval == 0) {
454 77 break;
455 }
456
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 11308 if ((retval == -1) && (errno == EINTR)) {
457 ✗ continue;
458 }
459
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 11308 if (retval == -1) {
460 ✗ break;
461 }
462
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 11308 if (c == '\n')
463 222 break;
464
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 11086 line->push_back(c);
465 }
466
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 299 return (retval == 1) || !line->empty();
467 }
468
469 /**
470 * Removes leading and trailing whitespaces.
471 */
472 14934 string Trim(const string &raw, bool trim_newline) {
473
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 14934 if (raw.empty())
474
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 1603 return "";
475
476 13331 unsigned start_pos = 0;
477 14870 for (; (start_pos < raw.length())
478
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 28280 && (raw[start_pos] == ' ' || raw[start_pos] == '\t'
479
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 13410 || (trim_newline
480
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 1198 && (raw[start_pos] == '\n' || raw[start_pos] == '\r')));
481 ++start_pos) {
482 }
483 13331 unsigned end_pos = raw.length() - 1; // at least one character in raw
484 15693 for (;
485 (end_pos >= start_pos)
486
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 30109 && (raw[end_pos] == ' ' || raw[end_pos] == '\t'
487
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 14416 || (trim_newline && (raw[end_pos] == '\n' || raw[end_pos] == '\r')));
488 --end_pos) {
489 }
490
491 13331 return raw.substr(start_pos, end_pos - start_pos + 1);
492 }
493
494 132 std::string TrimString(const std::string &path,
495 const std::string &toTrim,
496 const int trimMode) {
497 132 std::string trimmed = path;
498
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 132 if (trimmed != toTrim) {
499
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 396 while ((trimMode & kTrimLeading) && HasPrefix(trimmed, toTrim, true)
500
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 594 && (trimmed.size() > toTrim.size())) {
501
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 198 trimmed = trimmed.substr(toTrim.size());
502 }
503
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 330 while ((trimMode & kTrimTrailing) && HasSuffix(trimmed, toTrim, true)
504
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 462 && (trimmed.size() > toTrim.size())) {
505
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 132 trimmed = trimmed.substr(0, trimmed.size() - toTrim.size());
506 }
507 }
508 132 return trimmed;
509 }
510
511 /**
512 * Converts all characters to upper case
513 */
514 615 string ToUpper(const string &mixed_case) {
515 615 string result(mixed_case);
516
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 2397 for (unsigned i = 0, l = result.length(); i < l; ++i) {
517
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 1782 result[i] = static_cast<char>(toupper(result[i]));
518 }
519 615 return result;
520 }
521
522 4689 string ReplaceAll(const string &haystack, const string &needle,
523 const string &replace_by) {
524 4689 string result(haystack);
525 4689 size_t pos = 0;
526 4689 const unsigned needle_size = needle.size();
527
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 4689 if (needle == "")
528 7 return result;
529
530
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 7418 while ((pos = result.find(needle, pos)) != string::npos)
531
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 2736 result.replace(pos, needle_size, replace_by);
532 4682 return result;
533 }
534
535 133808 static inline void Base64Block(const unsigned char input[3], const char *table,
536 char output[4]) {
537 133808 output[0] = table[(input[0] & 0xFD) >> 2];
538 133808 output[1] = table[((input[0] & 0x03) << 4) | ((input[1] & 0xF0) >> 4)];
539 133808 output[2] = table[((input[1] & 0x0F) << 2) | ((input[2] & 0xD0) >> 6)];
540 133808 output[3] = table[input[2] & 0x3F];
541 133808 }
542
543 3171 string Base64(const string &data) {
544 3171 string result;
545
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 3171 result.reserve((data.length() + 3) * 4 / 3);
546 3171 unsigned pos = 0;
547 const unsigned char *data_ptr = reinterpret_cast<const unsigned char *>(
548 3171 data.data());
549 3171 const unsigned length = data.length();
550
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 134337 while (pos + 2 < length) {
551 char encoded_block[4];
552 131166 Base64Block(data_ptr + pos, b64_table, encoded_block);
553
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 131166 result.append(encoded_block, 4);
554 131166 pos += 3;
555 }
556
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 3171 if (length % 3 != 0) {
557 unsigned char input[3];
558 2642 input[0] = data_ptr[pos];
559
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 2642 input[1] = ((length % 3) == 2) ? data_ptr[pos + 1] : 0;
560 2642 input[2] = 0;
561 char encoded_block[4];
562 2642 Base64Block(input, b64_table, encoded_block);
563
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 2642 result.append(encoded_block, 2);
564
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 2642 result.push_back(((length % 3) == 2) ? encoded_block[2] : '=');
565
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 2642 result.push_back('=');
566 }
567
568 3171 return result;
569 }
570
571 /**
572 * Safe encoding for URIs and path names: replace + by - and / by _
573 */
574 205 string Base64Url(const string &data) {
575 205 string base64 = Base64(data);
576
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 19985 for (unsigned i = 0, l = base64.length(); i < l; ++i) {
577
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 19780 if (base64[i] == '+') {
578
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 294 base64[i] = '-';
579
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 19486 } else if (base64[i] == '/') {
580
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 196 base64[i] = '_';
581 }
582 }
583 205 return base64;
584 }
585
586 1067651 static bool Debase64Block(const unsigned char input[4],
587 unsigned char output[3]) {
588 int32_t dec[4];
589
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 5338059 for (int i = 0; i < 4; ++i) {
590 4270457 dec[i] = db64_table[input[i]];
591
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 4270457 if (dec[i] < 0)
592 49 return false;
593 }
594
595 1067602 output[0] = (dec[0] << 2) | (dec[1] >> 4);
596 1067602 output[1] = ((dec[1] & 0x0F) << 4) | (dec[2] >> 2);
597 1067602 output[2] = ((dec[2] & 0x03) << 6) | dec[3];
598 1067602 return true;
599 }
600
601 /**
602 * Can decode both base64 and base64url
603 */
604 5648 bool Debase64(const string &data, string *decoded) {
605 5648 decoded->clear();
606 5648 decoded->reserve((data.length() + 4) * 3 / 4);
607 5648 unsigned pos = 0;
608 const unsigned char *data_ptr = reinterpret_cast<const unsigned char *>(
609 5648 data.data());
610 5648 const unsigned length = data.length();
611
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 5648 if (length == 0)
612 49 return true;
613
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 5599 if ((length % 4) != 0)
614 98 return false;
615
616
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 1073103 while (pos < length) {
617 unsigned char decoded_block[3];
618 1067651 const bool retval = Debase64Block(data_ptr + pos, decoded_block);
619
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 1067651 if (!retval)
620 49 return false;
621
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 1067602 decoded->append(reinterpret_cast<char *>(decoded_block), 3);
622 1067602 pos += 4;
623 }
624
625
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 16356 for (int i = 0; i < 2; ++i) {
626 10904 pos--;
627
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 10904 if (data[pos] == '=')
628 1946 decoded->erase(decoded->length() - 1);
629 }
630 5452 return true;
631 }
632
633 /**
634 * Assumes that source is terminated by a newline
635 */
636 154 string Tail(const string &source, unsigned num_lines) {
637
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 154 if (source.empty() || (num_lines == 0))
638
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 66 return "";
639
640 88 const int l = static_cast<int>(source.length());
641 88 int i = l - 1;
642
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 418 for (; i >= 0; --i) {
643 352 const char c = source.data()[i];
644
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 352 if (c == '\n') {
645
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 110 if (num_lines == 0) {
646 22 return source.substr(i + 1);
647 }
648 88 num_lines--;
649 }
650 }
651 66 return source;
652 }
653
654 /**
655 * Get UTC Time.
656 *
657 * @param format format if timestamp (YYYY-MM-DD HH:MM:SS by default)
658 * @return a timestamp string on success, empty string on failure
659 */
660 ✗ std::string GetGMTimestamp(const std::string &format) {
661 struct tm time_ptr;
662 char date_and_time[100];
663 ✗ const time_t t = time(NULL);
664 ✗ gmtime_r(&t, &time_ptr); // take UTC
665 // return empty string if formatting fails
666 ✗ if (!strftime(date_and_time, 100, format.c_str(), &time_ptr)) {
667 ✗ return "";
668 }
669 ✗ std::string timestamp(date_and_time);
670 ✗ return timestamp;
671 }
672
673 #ifdef CVMFS_NAMESPACE_GUARD
674 } // namespace CVMFS_NAMESPACE_GUARD
675 #endif
676