2 This file is part of GNUnet.
3 (C) 2005-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/strings.c
23 * @brief string functions
25 * @author Christian Grothoff
32 #include "gnunet_util_lib.h"
37 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
39 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
43 * Fill a buffer of the given size with
44 * count 0-terminated strings (given as varargs).
45 * If "buffer" is NULL, only compute the amount of
46 * space required (sum of "strlen(arg)+1").
48 * Unlike using "snprintf" with "%s", this function
49 * will add 0-terminators after each string. The
50 * "GNUNET_string_buffer_tokenize" function can be
51 * used to parse the buffer back into individual
54 * @param buffer the buffer to fill with strings, can
55 * be NULL in which case only the necessary
56 * amount of space will be calculated
57 * @param size number of bytes available in buffer
58 * @param count number of strings that follow
59 * @param ... count 0-terminated strings to copy to buffer
60 * @return number of bytes written to the buffer
61 * (or number of bytes that would have been written)
64 GNUNET_STRINGS_buffer_fill (char *buffer, size_t size, unsigned int count, ...)
75 s = va_arg (ap, const char *);
77 slen = strlen (s) + 1;
80 GNUNET_assert (needed + slen <= size);
81 memcpy (&buffer[needed], s, slen);
92 * Given a buffer of a given size, find "count"
93 * 0-terminated strings in the buffer and assign
94 * the count (varargs) of type "const char**" to the
95 * locations of the respective strings in the
98 * @param buffer the buffer to parse
99 * @param size size of the buffer
100 * @param count number of strings to locate
101 * @return offset of the character after the last 0-termination
102 * in the buffer, or 0 on error.
105 GNUNET_STRINGS_buffer_tokenize (const char *buffer, size_t size,
106 unsigned int count, ...)
114 va_start (ap, count);
117 r = va_arg (ap, const char **);
120 while ((needed < size) && (buffer[needed] != '\0'))
125 return 0; /* error */
128 needed++; /* skip 0-termination */
137 * Convert a given filesize into a fancy human-readable format.
139 * @param size number of bytes
140 * @return fancy representation of the size (possibly rounded) for humans
143 GNUNET_STRINGS_byte_size_fancy (unsigned long long size)
145 const char *unit = _( /* size unit */ "b");
168 ret = GNUNET_malloc (32);
169 GNUNET_snprintf (ret, 32, "%llu %s", size, unit);
175 * Unit conversion table entry for 'convert_with_table'.
177 struct ConversionTable
180 * Name of the unit (or NULL for end of table).
185 * Factor to apply for this unit.
187 unsigned long long value;
192 * Convert a string of the form "4 X 5 Y" into a numeric value
193 * by interpreting "X" and "Y" as units and then multiplying
194 * the numbers with the values associated with the respective
195 * unit from the conversion table.
197 * @param input input string to parse
198 * @param table table with the conversion of unit names to numbers
199 * @param output where to store the result
200 * @return GNUNET_OK on success, GNUNET_SYSERR on error
203 convert_with_table (const char *input,
204 const struct ConversionTable *table,
205 unsigned long long *output)
207 unsigned long long ret;
210 unsigned long long last;
215 in = GNUNET_strdup (input);
216 for (tok = strtok (in, " "); tok != NULL; tok = strtok (NULL, " "))
221 while ((table[i].name != NULL) && (0 != strcasecmp (table[i].name, tok)))
223 if (table[i].name != NULL)
225 last *= table[i].value;
226 break; /* next tok */
233 last = strtoull (tok, &endptr, 10);
234 if ((0 != errno) || (endptr == tok))
237 return GNUNET_SYSERR; /* expected number */
239 if ('\0' == endptr[0])
240 break; /* next tok */
242 tok = endptr; /* and re-check (handles times like "10s") */
244 } while (GNUNET_YES);
254 * Convert a given fancy human-readable size to bytes.
256 * @param fancy_size human readable string (i.e. 1 MB)
257 * @param size set to the size in bytes
258 * @return GNUNET_OK on success, GNUNET_SYSERR on error
261 GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
262 unsigned long long *size)
264 static const struct ConversionTable table[] =
269 { "MiB", 1024 * 1024},
270 { "MB", 1000 * 1000},
271 { "GiB", 1024 * 1024 * 1024},
272 { "GB", 1000 * 1000 * 1000},
273 { "TiB", 1024LL * 1024LL * 1024LL * 1024LL},
274 { "TB", 1000LL * 1000LL * 1000LL * 1024LL},
275 { "PiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
276 { "PB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL},
277 { "EiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
278 { "EB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL * 1000LL},
282 return convert_with_table (fancy_size,
289 * Convert a given fancy human-readable time to our internal
292 * @param fancy_time human readable string (i.e. 1 minute)
293 * @param rtime set to the relative time
294 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
297 GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
298 struct GNUNET_TIME_Relative *rtime)
300 static const struct ConversionTable table[] =
304 { "s", 1000 * 1000LL },
305 { "\"", 1000 * 1000LL },
306 { "m", 60 * 1000 * 1000LL},
307 { "min", 60 * 1000 * 1000LL},
308 { "minutes", 60 * 1000 * 1000LL},
309 { "'", 60 * 1000 * 1000LL},
310 { "h", 60 * 60 * 1000 * 1000LL},
311 { "d", 24 * 60 * 60 * 1000LL * 1000LL},
312 { "day", 24 * 60 * 60 * 1000LL * 1000LL},
313 { "days", 24 * 60 * 60 * 1000LL * 1000LL},
314 { "a", 31536000000000LL /* year */ },
318 unsigned long long val;
320 if (0 == strcasecmp ("forever", fancy_time))
322 *rtime = GNUNET_TIME_UNIT_FOREVER_REL;
325 ret = convert_with_table (fancy_time,
328 rtime->rel_value_us = (uint64_t) val;
334 * Convert a given fancy human-readable time to our internal
335 * representation. The human-readable time is expected to be
336 * in local time, whereas the returned value will be in UTC.
338 * @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
339 * @param atime set to the absolute time
340 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
343 GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
344 struct GNUNET_TIME_Absolute *atime)
349 if (0 == strcasecmp ("end of time", fancy_time))
351 *atime = GNUNET_TIME_UNIT_FOREVER_ABS;
354 memset (&tv, 0, sizeof (tv));
355 if ( (NULL == strptime (fancy_time, "%a %b %d %H:%M:%S %Y", &tv)) &&
356 (NULL == strptime (fancy_time, "%c", &tv)) &&
357 (NULL == strptime (fancy_time, "%Ec", &tv)) &&
358 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M:%S", &tv)) &&
359 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M", &tv)) &&
360 (NULL == strptime (fancy_time, "%x", &tv)) &&
361 (NULL == strptime (fancy_time, "%Ex", &tv)) &&
362 (NULL == strptime (fancy_time, "%Y-%m-%d", &tv)) &&
363 (NULL == strptime (fancy_time, "%Y-%m", &tv)) &&
364 (NULL == strptime (fancy_time, "%Y", &tv)) )
365 return GNUNET_SYSERR;
367 atime->abs_value_us = (uint64_t) ((uint64_t) t * 1000LL * 1000LL);
369 atime->abs_value_us -= 1000LL * 1000LL * timezone;
370 #elif defined WINDOWS
373 TIME_ZONE_INFORMATION tzi;
374 tzv = GetTimeZoneInformation (&tzi);
375 if (TIME_ZONE_ID_INVALID != tzv)
377 atime->abs_value_us -= 1000LL * 1000LL * tzi.Bias * 60LL;
386 * Convert the len characters long character sequence
387 * given in input that is in the given input charset
388 * to a string in given output charset.
390 * @param input input string
391 * @param len number of bytes in @a input
392 * @param input_charset character set used for @a input
393 * @param ouptut_charset desired character set for the return value
394 * @return the converted string (0-terminated),
395 * if conversion fails, a copy of the orignal
396 * string is returned.
399 GNUNET_STRINGS_conv (const char *input,
401 const char *input_charset,
402 const char *output_charset)
406 char *encoded_string;
407 size_t u8_string_length;
408 size_t encoded_string_length;
410 u8_string = u8_conv_from_encoding (input_charset,
415 if (NULL == u8_string)
417 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_from_encoding");
420 if (0 == strcmp (output_charset, "UTF-8"))
422 ret = GNUNET_malloc (u8_string_length + 1);
423 memcpy (ret, u8_string, u8_string_length);
424 ret[u8_string_length] = '\0';
428 encoded_string = u8_conv_to_encoding (output_charset, iconveh_error,
429 u8_string, u8_string_length,
431 &encoded_string_length);
433 if (NULL == encoded_string)
435 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_to_encoding");
438 ret = GNUNET_malloc (encoded_string_length + 1);
439 memcpy (ret, encoded_string, encoded_string_length);
440 ret[encoded_string_length] = '\0';
441 free (encoded_string);
444 LOG (GNUNET_ERROR_TYPE_WARNING, _("Character sets requested were `%s'->`%s'\n"),
445 "UTF-8", output_charset);
446 ret = GNUNET_malloc (len + 1);
447 memcpy (ret, input, len);
454 * Convert the len characters long character sequence
455 * given in input that is in the given charset
458 * @param input the input string (not necessarily 0-terminated)
459 * @param len the number of bytes in the @a input
460 * @param charset character set to convert from
461 * @return the converted string (0-terminated),
462 * if conversion fails, a copy of the orignal
463 * string is returned.
466 GNUNET_STRINGS_to_utf8 (const char *input,
470 return GNUNET_STRINGS_conv (input, len, charset, "UTF-8");
475 * Convert the len bytes-long UTF-8 string
476 * given in input to the given charset.
478 * @param input the input string (not necessarily 0-terminated)
479 * @param len the number of bytes in the @a input
480 * @param charset character set to convert to
481 * @return the converted string (0-terminated),
482 * if conversion fails, a copy of the orignal
483 * string is returned.
486 GNUNET_STRINGS_from_utf8 (const char *input,
490 return GNUNET_STRINGS_conv (input, len, "UTF-8", charset);
495 * Convert the utf-8 input string to lowercase
496 * Output needs to be allocated appropriately
498 * @param input input string
499 * @param output output buffer
502 GNUNET_STRINGS_utf8_tolower(const char* input, char** output)
507 tmp_in = u8_tolower ((uint8_t*)input, strlen ((char *) input),
508 NULL, UNINORM_NFD, NULL, &len);
509 memcpy(*output, tmp_in, len);
510 (*output)[len] = '\0';
516 * Convert the utf-8 input string to uppercase
517 * Output needs to be allocated appropriately
519 * @param input input string
520 * @param output output buffer
523 GNUNET_STRINGS_utf8_toupper(const char* input, char** output)
528 tmp_in = u8_toupper ((uint8_t*)input, strlen ((char *) input),
529 NULL, UNINORM_NFD, NULL, &len);
530 memcpy(*output, tmp_in, len);
531 (*output)[len] = '\0';
537 * Complete filename (a la shell) from abbrevition.
538 * @param fil the name of the file, may contain ~/ or
539 * be relative to the current directory
540 * @returns the full file name,
541 * NULL is returned on error
544 GNUNET_STRINGS_filename_expand (const char *fil)
561 if (fil[0] == DIR_SEPARATOR)
562 /* absolute path, just copy */
563 return GNUNET_strdup (fil);
566 fm = getenv ("HOME");
569 LOG (GNUNET_ERROR_TYPE_WARNING,
570 _("Failed to expand `$HOME': environment variable `HOME' not set"));
573 fm = GNUNET_strdup (fm);
574 /* do not copy '~' */
577 /* skip over dir seperator to be consistent */
578 if (fil_ptr[0] == DIR_SEPARATOR)
589 buffer = GNUNET_malloc (len);
590 if (getcwd (buffer, len) != NULL)
595 if ((errno == ERANGE) && (len < 1024 * 1024 * 4))
598 GNUNET_free (buffer);
601 GNUNET_free (buffer);
606 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "getcwd");
607 buffer = getenv ("PWD"); /* alternative */
609 fm = GNUNET_strdup (buffer);
612 fm = GNUNET_strdup ("./"); /* give up */
614 n = strlen (fm) + 1 + strlen (fil_ptr) + 1;
615 buffer = GNUNET_malloc (n);
616 GNUNET_snprintf (buffer, n, "%s%s%s", fm,
617 (fm[strlen (fm) - 1] ==
618 DIR_SEPARATOR) ? "" : DIR_SEPARATOR_STR, fil_ptr);
622 fn = GNUNET_malloc (MAX_PATH + 1);
624 if ((lRet = plibc_conv_to_win_path (fil, fn)) != ERROR_SUCCESS)
626 SetErrnoFromWinError (lRet);
627 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "plibc_conv_to_win_path");
630 /* is the path relative? */
631 if ((strncmp (fn + 1, ":\\", 2) != 0) && (strncmp (fn, "\\\\", 2) != 0))
633 char szCurDir[MAX_PATH + 1];
635 lRet = GetCurrentDirectory (MAX_PATH + 1, szCurDir);
636 if (lRet + strlen (fn) + 1 > (MAX_PATH + 1))
638 SetErrnoFromWinError (ERROR_BUFFER_OVERFLOW);
639 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "GetCurrentDirectory");
642 buffer = GNUNET_malloc (MAX_PATH + 1);
643 GNUNET_snprintf (buffer, MAX_PATH + 1, "%s\\%s", szCurDir, fn);
654 * Give relative time in human-readable fancy format.
655 * This is one of the very few calls in the entire API that is
658 * @param delta time in milli seconds
659 * @param do_round are we allowed to round a bit?
660 * @return time as human-readable string
663 GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
666 static char buf[128];
667 const char *unit = _( /* time unit */ "µs");
668 uint64_t dval = delta.rel_value_us;
670 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == delta.rel_value_us)
672 if (0 == delta.rel_value_us)
674 if ( ( (GNUNET_YES == do_round) &&
675 (dval > 5 * 1000) ) ||
676 (0 == (dval % 1000) ))
679 unit = _( /* time unit */ "ms");
680 if ( ( (GNUNET_YES == do_round) &&
681 (dval > 5 * 1000) ) ||
682 (0 == (dval % 1000) ))
685 unit = _( /* time unit */ "s");
686 if ( ( (GNUNET_YES == do_round) &&
688 (0 == (dval % 60) ) )
691 unit = _( /* time unit */ "m");
692 if ( ( (GNUNET_YES == do_round) &&
697 unit = _( /* time unit */ "h");
698 if ( ( (GNUNET_YES == do_round) &&
704 unit = _( /* time unit */ "day");
706 unit = _( /* time unit */ "days");
712 GNUNET_snprintf (buf, sizeof (buf),
713 "%llu %s", dval, unit);
719 * "asctime", except for GNUnet time. Converts a GNUnet internal
720 * absolute time (which is in UTC) to a string in local time.
721 * Note that the returned value will be overwritten if this function
724 * @param t time to convert
725 * @return absolute time in human-readable format
728 GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t)
730 static char buf[255];
734 if (t.abs_value_us == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
735 return _("end of time");
736 tt = t.abs_value_us / 1000LL / 1000LL;
738 strftime (buf, sizeof (buf), "%a %b %d %H:%M:%S %Y", tp);
745 * Returns a pointer to a part of filename (allocates nothing)!
747 * @param filename filename to extract basename from
748 * @return short (base) name of the file (that is, everything following the
749 * last directory separator in filename. If filename ends with a
750 * directory separator, the result will be a zero-length string.
751 * If filename has no directory separators, the result is filename
755 GNUNET_STRINGS_get_short_name (const char *filename)
757 const char *short_fn = filename;
759 while (NULL != (ss = strstr (short_fn, DIR_SEPARATOR_STR))
767 * Get the numeric value corresponding to a character.
769 * @param a a character
770 * @return corresponding numeric value
773 getValue__ (unsigned char a)
775 if ((a >= '0') && (a <= '9'))
777 if ((a >= 'A') && (a <= 'V'))
778 return (a - 'A' + 10);
784 * Convert binary data to ASCII encoding. The ASCII encoding is rather
785 * GNUnet specific. It was chosen such that it only uses characters
786 * in [0-9A-V], can be produced without complex arithmetics and uses a
787 * small number of characters.
788 * Does not append 0-terminator, but returns a pointer to the place where
789 * it should be placed, if needed.
791 * @param data data to encode
792 * @param size size of data (in bytes)
793 * @param out buffer to fill
794 * @param out_size size of the buffer. Must be large enough to hold
795 * ((size*8) + (((size*8) % 5) > 0 ? 5 - ((size*8) % 5) : 0)) / 5 bytes
796 * @return pointer to the next byte in 'out' or NULL on error.
799 GNUNET_STRINGS_data_to_string (const void *data, size_t size, char *out, size_t out_size)
802 * 32 characters for encoding
804 static char *encTable__ = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
809 const unsigned char *udata;
811 GNUNET_assert (data != NULL);
812 GNUNET_assert (out != NULL);
814 if (out_size < (((size*8) + ((size*8) % 5)) % 5))
823 while ((rpos < size) || (vbit > 0))
825 if ((rpos < size) && (vbit < 5))
827 bits = (bits << 8) | udata[rpos++]; /* eat 8 more bits */
832 bits <<= (5 - vbit); /* zero-padding */
833 GNUNET_assert (vbit == ((size * 8) % 5));
836 if (wpos >= out_size)
841 out[wpos++] = encTable__[(bits >> (vbit - 5)) & 31];
844 GNUNET_assert (vbit == 0);
852 * Convert ASCII encoding back to data
853 * out_size must match exactly the size of the data before it was encoded.
855 * @param enc the encoding
856 * @param enclen number of characters in 'enc' (without 0-terminator, which can be missing)
857 * @param out location where to store the decoded data
858 * @param out_size size of the output buffer
859 * @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
862 GNUNET_STRINGS_string_to_data (const char *enc, size_t enclen,
863 void *out, size_t out_size)
872 unsigned int encoded_len = out_size * 8;
878 return GNUNET_SYSERR;
883 if ((encoded_len % 5) > 0)
885 vbit = encoded_len % 5; /* padding! */
887 bits = (ret = getValue__ (enc[--rpos])) >> (5 - (encoded_len % 5));
893 bits = (ret = getValue__ (enc[--rpos]));
895 if ((encoded_len + shift) / 5 != enclen)
896 return GNUNET_SYSERR;
898 return GNUNET_SYSERR;
904 return GNUNET_SYSERR;
906 bits = ((ret = getValue__ (enc[--rpos])) << vbit) | bits;
908 return GNUNET_SYSERR;
912 uout[--wpos] = (unsigned char) bits;
919 return GNUNET_SYSERR;
925 * Parse a path that might be an URI.
927 * @param path path to parse. Must be NULL-terminated.
928 * @param scheme_part a pointer to 'char *' where a pointer to a string that
929 * represents the URI scheme will be stored. Can be NULL. The string is
930 * allocated by the function, and should be freed by GNUNET_free() when
931 * it is no longer needed.
932 * @param path_part a pointer to 'const char *' where a pointer to the path
933 * part of the URI will be stored. Can be NULL. Points to the same block
934 * of memory as 'path', and thus must not be freed. Might point to '\0',
935 * if path part is zero-length.
936 * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
937 * an URI, '* scheme_part' and '*path_part' will remain unchanged
938 * (if they weren't NULL).
941 GNUNET_STRINGS_parse_uri (const char *path, char **scheme_part,
942 const char **path_part)
947 const char *post_scheme_part = NULL;
949 for (end = 0, i = 0; !end && i < len; i++)
954 if (path[i] == ':' && i > 0)
959 if (!((path[i] >= 'A' && path[i] <= 'Z') || (path[i] >= 'a' && path[i] <= 'z')
960 || (path[i] >= '0' && path[i] <= '9') || path[i] == '+' || path[i] == '-'
961 || (path[i] == '.')))
974 post_scheme_part = &path[i];
981 if (post_scheme_part == NULL)
985 *scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
986 memcpy (*scheme_part, path, post_scheme_part - path);
987 (*scheme_part)[post_scheme_part - path] = '\0';
990 *path_part = post_scheme_part;
996 * Check whether 'filename' is absolute or not, and if it's an URI
998 * @param filename filename to check
999 * @param can_be_uri GNUNET_YES to check for being URI, GNUNET_NO - to
1000 * assume it's not URI
1001 * @param r_is_uri a pointer to an int that is set to GNUNET_YES if 'filename'
1002 * is URI and to GNUNET_NO otherwise. Can be NULL. If 'can_be_uri' is
1003 * not GNUNET_YES, *r_is_uri is set to GNUNET_NO.
1004 * @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
1005 * The string is allocated by the function, and should be freed with
1006 * GNUNET_free (). Can be NULL.
1007 * @return GNUNET_YES if 'filename' is absolute, GNUNET_NO otherwise.
1010 GNUNET_STRINGS_path_is_absolute (const char *filename, int can_be_uri,
1011 int *r_is_uri, char **r_uri_scheme)
1016 const char *post_scheme_path;
1019 /* consider POSIX paths to be absolute too, even on W32,
1020 * as plibc expansion will fix them for us.
1022 if (filename[0] == '/')
1026 is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
1032 *r_uri_scheme = uri;
1034 GNUNET_free_non_null (uri);
1036 len = strlen(post_scheme_path);
1037 /* Special check for file:///c:/blah
1038 * We want to parse 'c:/', not '/c:/'
1040 if (post_scheme_path[0] == '/' && len >= 3 && post_scheme_path[2] == ':')
1041 post_scheme_path = &post_scheme_path[1];
1043 return GNUNET_STRINGS_path_is_absolute (post_scheme_path, GNUNET_NO, NULL, NULL);
1049 *r_is_uri = GNUNET_NO;
1052 len = strlen (filename);
1054 ((filename[0] >= 'A' && filename[0] <= 'Z')
1055 || (filename[0] >= 'a' && filename[0] <= 'z'))
1056 && filename[1] == ':' && (filename[2] == '/' || filename[2] == '\\'))
1063 #define _IFMT 0170000 /* type of file */
1064 #define _IFLNK 0120000 /* symbolic link */
1065 #define S_ISLNK(m) (((m)&_IFMT) == _IFLNK)
1070 * Perform 'checks' on 'filename'
1072 * @param filename file to check
1073 * @param checks checks to perform
1074 * @return GNUNET_YES if all checks pass, GNUNET_NO if at least one of them
1075 * fails, GNUNET_SYSERR when a check can't be performed
1078 GNUNET_STRINGS_check_filename (const char *filename,
1079 enum GNUNET_STRINGS_FilenameCheck checks)
1082 if ( (NULL == filename) || (filename[0] == '\0') )
1083 return GNUNET_SYSERR;
1084 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE))
1085 if (!GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
1087 if (0 != (checks & (GNUNET_STRINGS_CHECK_EXISTS
1088 | GNUNET_STRINGS_CHECK_IS_DIRECTORY
1089 | GNUNET_STRINGS_CHECK_IS_LINK)))
1091 if (0 != STAT (filename, &st))
1093 if (0 != (checks & GNUNET_STRINGS_CHECK_EXISTS))
1096 return GNUNET_SYSERR;
1099 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY))
1100 if (!S_ISDIR (st.st_mode))
1102 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_LINK))
1103 if (!S_ISLNK (st.st_mode))
1110 * Tries to convert 'zt_addr' string to an IPv6 address.
1111 * The string is expected to have the format "[ABCD::01]:80".
1113 * @param zt_addr 0-terminated string. May be mangled by the function.
1114 * @param addrlen length of zt_addr (not counting 0-terminator).
1115 * @param r_buf a buffer to fill. Initially gets filled with zeroes,
1116 * then its sin6_port, sin6_family and sin6_addr are set appropriately.
1117 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1118 * case the contents of r_buf are undefined.
1121 GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
1123 struct sockaddr_in6 *r_buf)
1125 char zbuf[addrlen + 1];
1131 return GNUNET_SYSERR;
1132 memcpy (zbuf, zt_addr, addrlen);
1135 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1136 _("IPv6 address did not start with `['\n"));
1137 return GNUNET_SYSERR;
1139 zbuf[addrlen] = '\0';
1140 port_colon = strrchr (zbuf, ':');
1141 if (NULL == port_colon)
1143 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1144 _("IPv6 address did contain ':' to separate port number\n"));
1145 return GNUNET_SYSERR;
1147 if (']' != *(port_colon - 1))
1149 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1150 _("IPv6 address did contain ']' before ':' to separate port number\n"));
1151 return GNUNET_SYSERR;
1153 ret = SSCANF (port_colon, ":%u", &port);
1154 if ( (1 != ret) || (port > 65535) )
1156 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1157 _("IPv6 address did contain a valid port number after the last ':'\n"));
1158 return GNUNET_SYSERR;
1160 *(port_colon-1) = '\0';
1161 memset (r_buf, 0, sizeof (struct sockaddr_in6));
1162 ret = inet_pton (AF_INET6, &zbuf[1], &r_buf->sin6_addr);
1165 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1166 _("Invalid IPv6 address `%s': %s\n"),
1169 return GNUNET_SYSERR;
1171 r_buf->sin6_port = htons (port);
1172 r_buf->sin6_family = AF_INET6;
1173 #if HAVE_SOCKADDR_IN_SIN_LEN
1174 r_buf->sin6_len = (u_char) sizeof (struct sockaddr_in6);
1181 * Tries to convert 'zt_addr' string to an IPv4 address.
1182 * The string is expected to have the format "1.2.3.4:80".
1184 * @param zt_addr 0-terminated string. May be mangled by the function.
1185 * @param addrlen length of zt_addr (not counting 0-terminator).
1186 * @param r_buf a buffer to fill.
1187 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which case
1188 * the contents of r_buf are undefined.
1191 GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr, uint16_t addrlen,
1192 struct sockaddr_in *r_buf)
1194 unsigned int temps[4];
1199 return GNUNET_SYSERR;
1200 cnt = SSCANF (zt_addr, "%u.%u.%u.%u:%u", &temps[0], &temps[1], &temps[2], &temps[3], &port);
1202 return GNUNET_SYSERR;
1203 for (cnt = 0; cnt < 4; cnt++)
1204 if (temps[cnt] > 0xFF)
1205 return GNUNET_SYSERR;
1207 return GNUNET_SYSERR;
1208 r_buf->sin_family = AF_INET;
1209 r_buf->sin_port = htons (port);
1210 r_buf->sin_addr.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16) +
1211 (temps[2] << 8) + temps[3]);
1212 #if HAVE_SOCKADDR_IN_SIN_LEN
1213 r_buf->sin_len = (u_char) sizeof (struct sockaddr_in);
1220 * Tries to convert 'addr' string to an IP (v4 or v6) address.
1221 * Will automatically decide whether to treat 'addr' as v4 or v6 address.
1223 * @param addr a string, may not be 0-terminated.
1224 * @param addrlen number of bytes in addr (if addr is 0-terminated,
1225 * 0-terminator should not be counted towards addrlen).
1226 * @param r_buf a buffer to fill.
1227 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1228 * case the contents of r_buf are undefined.
1231 GNUNET_STRINGS_to_address_ip (const char *addr,
1233 struct sockaddr_storage *r_buf)
1236 return GNUNET_STRINGS_to_address_ipv6 (addr, addrlen, (struct sockaddr_in6 *) r_buf);
1237 return GNUNET_STRINGS_to_address_ipv4 (addr, addrlen, (struct sockaddr_in *) r_buf);
1242 * Makes a copy of argv that consists of a single memory chunk that can be
1243 * freed with a single call to GNUNET_free ();
1245 static char *const *
1246 _make_continuous_arg_copy (int argc, char *const *argv)
1248 size_t argvsize = 0;
1252 for (i = 0; i < argc; i++)
1253 argvsize += strlen (argv[i]) + 1 + sizeof (char *);
1254 new_argv = GNUNET_malloc (argvsize + sizeof (char *));
1255 p = (char *) &new_argv[argc + 1];
1256 for (i = 0; i < argc; i++)
1259 strcpy (p, argv[i]);
1260 p += strlen (argv[i]) + 1;
1262 new_argv[argc] = NULL;
1263 return (char *const *) new_argv;
1268 * Returns utf-8 encoded arguments.
1269 * Does nothing (returns a copy of argc and argv) on any platform
1271 * Returned argv has u8argv[u8argc] == NULL.
1272 * Returned argv is a single memory block, and can be freed with a single
1273 * GNUNET_free () call.
1275 * @param argc argc (as given by main())
1276 * @param argv argv (as given by main())
1277 * @param u8argc a location to store new argc in (though it's th same as argc)
1278 * @param u8argv a location to store new argv in
1279 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1282 GNUNET_STRINGS_get_utf8_args (int argc, char *const *argv, int *u8argc, char *const **u8argv)
1289 char **split_u8argv;
1291 wcmd = GetCommandLineW ();
1293 return GNUNET_SYSERR;
1294 wargv = CommandLineToArgvW (wcmd, &wargc);
1296 return GNUNET_SYSERR;
1298 split_u8argv = GNUNET_malloc (argc * sizeof (char *));
1300 for (i = 0; i < wargc; i++)
1303 /* Hopefully it will allocate us NUL-terminated strings... */
1304 split_u8argv[i] = (char *) u16_to_u8 (wargv[i], wcslen (wargv[i]) + 1, NULL, &strl);
1305 if (NULL == split_u8argv[i])
1308 for (j = 0; j < i; j++)
1309 free (split_u8argv[j]);
1310 GNUNET_free (split_u8argv);
1312 return GNUNET_SYSERR;
1316 *u8argv = _make_continuous_arg_copy (wargc, split_u8argv);
1319 for (i = 0; i < wargc; i++)
1320 free (split_u8argv[i]);
1321 free (split_u8argv);
1324 char *const *new_argv = (char *const *) _make_continuous_arg_copy (argc, argv);
1331 /* end of strings.c */