2 This file is part of GNUnet.
3 (C) 2005, 2006 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 2, 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_common.h"
33 #include "gnunet_strings_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, " "))
219 while ((table[i].name != NULL) && (0 != strcasecmp (table[i].name, tok)))
221 if (table[i].name != NULL)
222 last *= table[i].value;
227 if (1 != SSCANF (tok, "%llu", &last))
230 return GNUNET_SYSERR; /* expected number */
242 * Convert a given fancy human-readable size to bytes.
244 * @param fancy_size human readable string (i.e. 1 MB)
245 * @param size set to the size in bytes
246 * @return GNUNET_OK on success, GNUNET_SYSERR on error
249 GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
250 unsigned long long *size)
252 static const struct ConversionTable table[] =
257 { "MiB", 1024 * 1024},
258 { "MB", 1000 * 1000},
259 { "GiB", 1024 * 1024 * 1024},
260 { "GB", 1000 * 1000 * 1000},
261 { "TiB", 1024LL * 1024LL * 1024LL * 1024LL},
262 { "TB", 1000LL * 1000LL * 1000LL * 1024LL},
263 { "PiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
264 { "PB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL},
265 { "EiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
266 { "EB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL * 1000LL},
270 return convert_with_table (fancy_size,
277 * Convert a given fancy human-readable time to our internal
280 * @param fancy_time human readable string (i.e. 1 minute)
281 * @param rtime set to the relative time
282 * @return GNUNET_OK on success, GNUNET_SYSERR on error
285 GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
286 struct GNUNET_TIME_Relative *rtime)
288 static const struct ConversionTable table[] =
295 { "minutes", 60 * 1000},
297 { "h", 60 * 60 * 1000},
298 { "d", 24 * 60 * 60 * 1000},
299 { "day", 24 * 60 * 60 * 1000},
300 { "days", 24 * 60 * 60 * 1000},
301 { "a", 31536000000LL /* year */ },
305 unsigned long long val;
307 if (0 == strcasecmp ("forever", fancy_time))
309 *rtime = GNUNET_TIME_UNIT_FOREVER_REL;
312 ret = convert_with_table (fancy_time,
315 rtime->rel_value = (uint64_t) val;
321 * Convert a given fancy human-readable time to our internal
324 * @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
325 * @param atime set to the absolute time
326 * @return GNUNET_OK on success, GNUNET_SYSERR on error
329 GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
330 struct GNUNET_TIME_Absolute *atime)
335 if (0 == strcasecmp ("end of time", fancy_time))
337 *atime = GNUNET_TIME_UNIT_FOREVER_ABS;
340 memset (&tv, 0, sizeof (tv));
341 if ( (NULL == strptime (fancy_time, "%a %b %d %H:%M:%S %Y", &tv)) &&
342 (NULL == strptime (fancy_time, "%c", &tv)) &&
343 (NULL == strptime (fancy_time, "%Ec", &tv)) &&
344 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M:%S", &tv)) &&
345 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M", &tv)) &&
346 (NULL == strptime (fancy_time, "%x", &tv)) &&
347 (NULL == strptime (fancy_time, "%Ex", &tv)) &&
348 (NULL == strptime (fancy_time, "%Y-%m-%d", &tv)) &&
349 (NULL == strptime (fancy_time, "%Y-%m", &tv)) &&
350 (NULL == strptime (fancy_time, "%Y", &tv)) )
351 return GNUNET_SYSERR;
353 atime->abs_value = (uint64_t) ((uint64_t) t * 1000LL);
355 atime->abs_value -= 1000LL * timezone;
362 * Convert the len characters long character sequence
363 * given in input that is in the given input charset
364 * to a string in given output charset.
365 * @return the converted string (0-terminated),
366 * if conversion fails, a copy of the orignal
367 * string is returned.
370 GNUNET_STRINGS_conv (const char *input, size_t len, const char *input_charset, const char *output_charset)
374 #if ENABLE_NLS && HAVE_ICONV
381 cd = iconv_open (output_charset, input_charset);
382 if (cd == (iconv_t) - 1)
384 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv_open");
385 LOG (GNUNET_ERROR_TYPE_WARNING, _("Character sets requested were `%s'->`%s'\n"),
386 input_charset, output_charset);
387 ret = GNUNET_malloc (len + 1);
388 memcpy (ret, input, len);
392 tmpSize = 3 * len + 4;
393 tmp = GNUNET_malloc (tmpSize);
397 #if FREEBSD || DARWIN || WINDOWS
398 (const char **) &input,
402 &len, &itmp, &finSize) == SIZE_MAX)
404 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv");
407 ret = GNUNET_malloc (len + 1);
408 memcpy (ret, input, len);
412 ret = GNUNET_malloc (tmpSize - finSize + 1);
413 memcpy (ret, tmp, tmpSize - finSize);
414 ret[tmpSize - finSize] = '\0';
416 if (0 != iconv_close (cd))
417 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv_close");
420 ret = GNUNET_malloc (len + 1);
421 memcpy (ret, input, len);
429 * Convert the len characters long character sequence
430 * given in input that is in the given charset
432 * @return the converted string (0-terminated),
433 * if conversion fails, a copy of the orignal
434 * string is returned.
437 GNUNET_STRINGS_to_utf8 (const char *input, size_t len, const char *charset)
439 return GNUNET_STRINGS_conv (input, len, charset, "UTF-8");
444 * Convert the len bytes-long UTF-8 string
445 * given in input to the given charset.
447 * @return the converted string (0-terminated),
448 * if conversion fails, a copy of the orignal
449 * string is returned.
452 GNUNET_STRINGS_from_utf8 (const char *input, size_t len, const char *charset)
454 return GNUNET_STRINGS_conv (input, len, "UTF-8", charset);
459 * Convert the utf-8 input string to lowercase
460 * Output needs to be allocated appropriately
462 * @param input input string
463 * @param output output buffer
466 GNUNET_STRINGS_utf8_tolower(const char* input, char** output)
471 tmp_in = u8_tolower ((uint8_t*)input, strlen ((char *) input),
472 NULL, UNINORM_NFD, NULL, &len);
473 memcpy(*output, tmp_in, len);
474 (*output)[len] = '\0';
480 * Convert the utf-8 input string to uppercase
481 * Output needs to be allocated appropriately
483 * @param input input string
484 * @param output output buffer
487 GNUNET_STRINGS_utf8_toupper(const char* input, char** output)
492 tmp_in = u8_toupper ((uint8_t*)input, strlen ((char *) input),
493 NULL, UNINORM_NFD, NULL, &len);
494 memcpy(*output, tmp_in, len);
495 (*output)[len] = '\0';
501 * Complete filename (a la shell) from abbrevition.
502 * @param fil the name of the file, may contain ~/ or
503 * be relative to the current directory
504 * @returns the full file name,
505 * NULL is returned on error
508 GNUNET_STRINGS_filename_expand (const char *fil)
525 if (fil[0] == DIR_SEPARATOR)
526 /* absolute path, just copy */
527 return GNUNET_strdup (fil);
530 fm = getenv ("HOME");
533 LOG (GNUNET_ERROR_TYPE_WARNING,
534 _("Failed to expand `$HOME': environment variable `HOME' not set"));
537 fm = GNUNET_strdup (fm);
538 /* do not copy '~' */
541 /* skip over dir seperator to be consistent */
542 if (fil_ptr[0] == DIR_SEPARATOR)
553 buffer = GNUNET_malloc (len);
554 if (getcwd (buffer, len) != NULL)
559 if ((errno == ERANGE) && (len < 1024 * 1024 * 4))
562 GNUNET_free (buffer);
565 GNUNET_free (buffer);
570 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "getcwd");
571 buffer = getenv ("PWD"); /* alternative */
573 fm = GNUNET_strdup (buffer);
576 fm = GNUNET_strdup ("./"); /* give up */
578 n = strlen (fm) + 1 + strlen (fil_ptr) + 1;
579 buffer = GNUNET_malloc (n);
580 GNUNET_snprintf (buffer, n, "%s%s%s", fm,
581 (fm[strlen (fm) - 1] ==
582 DIR_SEPARATOR) ? "" : DIR_SEPARATOR_STR, fil_ptr);
586 fn = GNUNET_malloc (MAX_PATH + 1);
588 if ((lRet = plibc_conv_to_win_path (fil, fn)) != ERROR_SUCCESS)
590 SetErrnoFromWinError (lRet);
591 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "plibc_conv_to_win_path");
594 /* is the path relative? */
595 if ((strncmp (fn + 1, ":\\", 2) != 0) && (strncmp (fn, "\\\\", 2) != 0))
597 char szCurDir[MAX_PATH + 1];
599 lRet = GetCurrentDirectory (MAX_PATH + 1, szCurDir);
600 if (lRet + strlen (fn) + 1 > (MAX_PATH + 1))
602 SetErrnoFromWinError (ERROR_BUFFER_OVERFLOW);
603 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "GetCurrentDirectory");
606 buffer = GNUNET_malloc (MAX_PATH + 1);
607 GNUNET_snprintf (buffer, MAX_PATH + 1, "%s\\%s", szCurDir, fn);
618 * Give relative time in human-readable fancy format.
619 * This is one of the very few calls in the entire API that is
622 * @param delta time in milli seconds
623 * @param do_round are we allowed to round a bit?
624 * @return time as human-readable string
627 GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
630 static char buf[128];
631 const char *unit = _( /* time unit */ "ms");
632 uint64_t dval = delta.rel_value;
634 if (delta.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
636 if ( ( (GNUNET_YES == do_round) &&
637 (dval > 5 * 1000) ) ||
638 (0 == (dval % 1000) ))
641 unit = _( /* time unit */ "s");
642 if ( ( (GNUNET_YES == do_round) &&
644 (0 == (dval % 60) ) )
647 unit = _( /* time unit */ "m");
648 if ( ( (GNUNET_YES == do_round) &&
653 unit = _( /* time unit */ "h");
654 if ( ( (GNUNET_YES == do_round) &&
660 unit = _( /* time unit */ "day");
662 unit = _( /* time unit */ "days");
667 GNUNET_snprintf (buf, sizeof (buf),
668 "%llu %s", dval, unit);
674 * "asctime", except for GNUnet time.
675 * This is one of the very few calls in the entire API that is
678 * @param t time to convert
679 * @return absolute time in human-readable format
682 GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t)
684 static char buf[255];
688 if (t.abs_value == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
689 return GNUNET_strdup (_("end of time"));
690 tt = t.abs_value / 1000;
692 strftime (buf, sizeof (buf), "%a %b %d %H:%M:%S %Y", tp);
693 return GNUNET_strdup (buf);
699 * Returns a pointer to a part of filename (allocates nothing)!
701 * @param filename filename to extract basename from
702 * @return short (base) name of the file (that is, everything following the
703 * last directory separator in filename. If filename ends with a
704 * directory separator, the result will be a zero-length string.
705 * If filename has no directory separators, the result is filename
709 GNUNET_STRINGS_get_short_name (const char *filename)
711 const char *short_fn = filename;
713 while (NULL != (ss = strstr (short_fn, DIR_SEPARATOR_STR))
721 * Get the numeric value corresponding to a character.
723 * @param a a character
724 * @return corresponding numeric value
727 getValue__ (unsigned char a)
729 if ((a >= '0') && (a <= '9'))
731 if ((a >= 'A') && (a <= 'V'))
732 return (a - 'A' + 10);
738 * Convert binary data to ASCII encoding. The ASCII encoding is rather
739 * GNUnet specific. It was chosen such that it only uses characters
740 * in [0-9A-V], can be produced without complex arithmetics and uses a
741 * small number of characters.
742 * Does not append 0-terminator, but returns a pointer to the place where
743 * it should be placed, if needed.
745 * @param data data to encode
746 * @param size size of data (in bytes)
747 * @param out buffer to fill
748 * @param out_size size of the buffer. Must be large enough to hold
749 * ((size*8) + (((size*8) % 5) > 0 ? 5 - ((size*8) % 5) : 0)) / 5 bytes
750 * @return pointer to the next byte in 'out' or NULL on error.
753 GNUNET_STRINGS_data_to_string (const unsigned char *data, size_t size, char *out, size_t out_size)
756 * 32 characters for encoding
758 static char *encTable__ = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
764 GNUNET_assert (data != NULL);
765 GNUNET_assert (out != NULL);
766 if (out_size < (((size*8) + ((size*8) % 5)) % 5))
775 while ((rpos < size) || (vbit > 0))
777 if ((rpos < size) && (vbit < 5))
779 bits = (bits << 8) | data[rpos++]; /* eat 8 more bits */
784 bits <<= (5 - vbit); /* zero-padding */
785 GNUNET_assert (vbit == ((size * 8) % 5));
788 if (wpos >= out_size)
793 out[wpos++] = encTable__[(bits >> (vbit - 5)) & 31];
796 if (wpos != out_size)
801 GNUNET_assert (vbit == 0);
807 * Convert ASCII encoding back to data
808 * out_size must match exactly the size of the data before it was encoded.
810 * @param enc the encoding
811 * @param enclen number of characters in 'enc' (without 0-terminator, which can be missing)
812 * @param out location where to store the decoded data
813 * @param out_size sizeof the output buffer
814 * @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
817 GNUNET_STRINGS_string_to_data (const char *enc, size_t enclen,
818 unsigned char *out, size_t out_size)
826 int encoded_len = out_size * 8;
827 if (encoded_len % 5 > 0)
829 vbit = encoded_len % 5; /* padding! */
837 if ((encoded_len + shift) / 5 != enclen)
838 return GNUNET_SYSERR;
842 bits = (ret = getValue__ (enc[--rpos])) >> (5 - encoded_len % 5);
844 return GNUNET_SYSERR;
847 GNUNET_assert (rpos > 0);
848 bits = ((ret = getValue__ (enc[--rpos])) << vbit) | bits;
850 return GNUNET_SYSERR;
854 out[--wpos] = (unsigned char) bits;
859 GNUNET_assert (rpos == 0);
860 GNUNET_assert (vbit == 0);
866 * Parse a path that might be an URI.
868 * @param path path to parse. Must be NULL-terminated.
869 * @param scheme_part a pointer to 'char *' where a pointer to a string that
870 * represents the URI scheme will be stored. Can be NULL. The string is
871 * allocated by the function, and should be freed by GNUNET_free() when
872 * it is no longer needed.
873 * @param path_part a pointer to 'const char *' where a pointer to the path
874 * part of the URI will be stored. Can be NULL. Points to the same block
875 * of memory as 'path', and thus must not be freed. Might point to '\0',
876 * if path part is zero-length.
877 * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
878 * an URI, '* scheme_part' and '*path_part' will remain unchanged
879 * (if they weren't NULL).
882 GNUNET_STRINGS_parse_uri (const char *path, char **scheme_part,
883 const char **path_part)
888 const char *post_scheme_part = NULL;
890 for (end = 0, i = 0; !end && i < len; i++)
895 if (path[i] == ':' && i > 0)
900 if (!((path[i] >= 'A' && path[i] <= 'Z') || (path[i] >= 'a' && path[i] <= 'z')
901 || (path[i] >= '0' && path[i] <= '9') || path[i] == '+' || path[i] == '-'
902 || (path[i] == '.')))
915 post_scheme_part = &path[i];
922 if (post_scheme_part == NULL)
926 *scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
927 memcpy (*scheme_part, path, post_scheme_part - path);
928 (*scheme_part)[post_scheme_part - path] = '\0';
931 *path_part = post_scheme_part;
937 * Check whether 'filename' is absolute or not, and if it's an URI
939 * @param filename filename to check
940 * @param can_be_uri GNUNET_YES to check for being URI, GNUNET_NO - to
941 * assume it's not URI
942 * @param r_is_uri a pointer to an int that is set to GNUNET_YES if 'filename'
943 * is URI and to GNUNET_NO otherwise. Can be NULL. If 'can_be_uri' is
944 * not GNUNET_YES, *r_is_uri is set to GNUNET_NO.
945 * @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
946 * The string is allocated by the function, and should be freed with
947 * GNUNET_free (). Can be NULL.
948 * @return GNUNET_YES if 'filename' is absolute, GNUNET_NO otherwise.
951 GNUNET_STRINGS_path_is_absolute (const char *filename, int can_be_uri,
952 int *r_is_uri, char **r_uri_scheme)
957 const char *post_scheme_path;
960 /* consider POSIX paths to be absolute too, even on W32,
961 * as plibc expansion will fix them for us.
963 if (filename[0] == '/')
967 is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
975 GNUNET_free_non_null (uri);
977 len = strlen(post_scheme_path);
978 /* Special check for file:///c:/blah
979 * We want to parse 'c:/', not '/c:/'
981 if (post_scheme_path[0] == '/' && len >= 3 && post_scheme_path[2] == ':')
982 post_scheme_path = &post_scheme_path[1];
984 return GNUNET_STRINGS_path_is_absolute (post_scheme_path, GNUNET_NO, NULL, NULL);
991 *r_is_uri = GNUNET_NO;
994 len = strlen (filename);
996 ((filename[0] >= 'A' && filename[0] <= 'Z')
997 || (filename[0] >= 'a' && filename[0] <= 'z'))
998 && filename[1] == ':' && (filename[2] == '/' || filename[2] == '\\'))
1005 #define _IFMT 0170000 /* type of file */
1006 #define _IFLNK 0120000 /* symbolic link */
1007 #define S_ISLNK(m) (((m)&_IFMT) == _IFLNK)
1012 * Perform 'checks' on 'filename'
1014 * @param filename file to check
1015 * @param checks checks to perform
1016 * @return GNUNET_YES if all checks pass, GNUNET_NO if at least one of them
1017 * fails, GNUNET_SYSERR when a check can't be performed
1020 GNUNET_STRINGS_check_filename (const char *filename,
1021 enum GNUNET_STRINGS_FilenameCheck checks)
1024 if ( (NULL == filename) || (filename[0] == '\0') )
1025 return GNUNET_SYSERR;
1026 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE))
1027 if (!GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
1029 if (0 != (checks & (GNUNET_STRINGS_CHECK_EXISTS
1030 | GNUNET_STRINGS_CHECK_IS_DIRECTORY
1031 | GNUNET_STRINGS_CHECK_IS_LINK)))
1033 if (0 != STAT (filename, &st))
1035 if (0 != (checks & GNUNET_STRINGS_CHECK_EXISTS))
1038 return GNUNET_SYSERR;
1041 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY))
1042 if (!S_ISDIR (st.st_mode))
1044 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_LINK))
1045 if (!S_ISLNK (st.st_mode))
1052 * Tries to convert 'zt_addr' string to an IPv6 address.
1053 * The string is expected to have the format "[ABCD::01]:80".
1055 * @param zt_addr 0-terminated string. May be mangled by the function.
1056 * @param addrlen length of zt_addr (not counting 0-terminator).
1057 * @param r_buf a buffer to fill. Initially gets filled with zeroes,
1058 * then its sin6_port, sin6_family and sin6_addr are set appropriately.
1059 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1060 * case the contents of r_buf are undefined.
1063 GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
1065 struct sockaddr_in6 *r_buf)
1067 char zbuf[addrlen + 1];
1073 return GNUNET_SYSERR;
1074 memcpy (zbuf, zt_addr, addrlen);
1077 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1078 _("IPv6 address did not start with `['\n"));
1079 return GNUNET_SYSERR;
1081 zbuf[addrlen] = '\0';
1082 port_colon = strrchr (zbuf, ':');
1083 if (NULL == port_colon)
1085 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1086 _("IPv6 address did contain ':' to separate port number\n"));
1087 return GNUNET_SYSERR;
1089 if (']' != *(port_colon - 1))
1091 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1092 _("IPv6 address did contain ']' before ':' to separate port number\n"));
1093 return GNUNET_SYSERR;
1095 ret = SSCANF (port_colon, ":%u", &port);
1096 if ( (1 != ret) || (port > 65535) )
1098 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1099 _("IPv6 address did contain a valid port number after the last ':'\n"));
1100 return GNUNET_SYSERR;
1102 *(port_colon-1) = '\0';
1103 memset (r_buf, 0, sizeof (struct sockaddr_in6));
1104 ret = inet_pton (AF_INET6, &zbuf[1], &r_buf->sin6_addr);
1107 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1108 _("Invalid IPv6 address `%s': %s\n"),
1111 return GNUNET_SYSERR;
1113 r_buf->sin6_port = htons (port);
1114 r_buf->sin6_family = AF_INET6;
1115 #if HAVE_SOCKADDR_IN_SIN_LEN
1116 r_buf->sin6_len = (u_char) sizeof (struct sockaddr_in6);
1123 * Tries to convert 'zt_addr' string to an IPv4 address.
1124 * The string is expected to have the format "1.2.3.4:80".
1126 * @param zt_addr 0-terminated string. May be mangled by the function.
1127 * @param addrlen length of zt_addr (not counting 0-terminator).
1128 * @param r_buf a buffer to fill.
1129 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which case
1130 * the contents of r_buf are undefined.
1133 GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr, uint16_t addrlen,
1134 struct sockaddr_in *r_buf)
1136 unsigned int temps[4];
1141 return GNUNET_SYSERR;
1142 cnt = SSCANF (zt_addr, "%u.%u.%u.%u:%u", &temps[0], &temps[1], &temps[2], &temps[3], &port);
1144 return GNUNET_SYSERR;
1145 for (cnt = 0; cnt < 4; cnt++)
1146 if (temps[cnt] > 0xFF)
1147 return GNUNET_SYSERR;
1149 return GNUNET_SYSERR;
1150 r_buf->sin_family = AF_INET;
1151 r_buf->sin_port = htons (port);
1152 r_buf->sin_addr.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16) +
1153 (temps[2] << 8) + temps[3]);
1154 #if HAVE_SOCKADDR_IN_SIN_LEN
1155 r_buf->sin_len = (u_char) sizeof (struct sockaddr_in);
1162 * Tries to convert 'addr' string to an IP (v4 or v6) address.
1163 * Will automatically decide whether to treat 'addr' as v4 or v6 address.
1165 * @param addr a string, may not be 0-terminated.
1166 * @param addrlen number of bytes in addr (if addr is 0-terminated,
1167 * 0-terminator should not be counted towards addrlen).
1168 * @param r_buf a buffer to fill.
1169 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1170 * case the contents of r_buf are undefined.
1173 GNUNET_STRINGS_to_address_ip (const char *addr,
1175 struct sockaddr_storage *r_buf)
1178 return GNUNET_STRINGS_to_address_ipv6 (addr, addrlen, (struct sockaddr_in6 *) r_buf);
1179 return GNUNET_STRINGS_to_address_ipv4 (addr, addrlen, (struct sockaddr_in *) r_buf);
1184 * Makes a copy of argv that consists of a single memory chunk that can be
1185 * freed with a single call to GNUNET_free ();
1187 static char *const *
1188 _make_continuous_arg_copy (int argc, char *const *argv)
1190 size_t argvsize = 0;
1194 for (i = 0; i < argc; i++)
1195 argvsize += strlen (argv[i]) + 1 + sizeof (char *);
1196 new_argv = GNUNET_malloc (argvsize + sizeof (char *));
1197 p = (char *) &new_argv[argc + 1];
1198 for (i = 0; i < argc; i++)
1201 strcpy (p, argv[i]);
1202 p += strlen (argv[i]) + 1;
1204 new_argv[argc] = NULL;
1205 return (char *const *) new_argv;
1210 * Returns utf-8 encoded arguments.
1211 * Does nothing (returns a copy of argc and argv) on any platform
1213 * Returned argv has u8argv[u8argc] == NULL.
1214 * Returned argv is a single memory block, and can be freed with a single
1215 * GNUNET_free () call.
1217 * @param argc argc (as given by main())
1218 * @param argv argv (as given by main())
1219 * @param u8argc a location to store new argc in (though it's th same as argc)
1220 * @param u8argv a location to store new argv in
1221 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1224 GNUNET_STRINGS_get_utf8_args (int argc, char *const *argv, int *u8argc, char *const **u8argv)
1231 char **split_u8argv;
1233 wcmd = GetCommandLineW ();
1235 return GNUNET_SYSERR;
1236 wargv = CommandLineToArgvW (wcmd, &wargc);
1238 return GNUNET_SYSERR;
1240 split_u8argv = GNUNET_malloc (argc * sizeof (char *));
1242 for (i = 0; i < wargc; i++)
1245 /* Hopefully it will allocate us NUL-terminated strings... */
1246 split_u8argv[i] = (char *) u16_to_u8 (wargv[i], wcslen (wargv[i]) + 1, NULL, &strl);
1247 if (split_u8argv == NULL)
1250 for (j = 0; j < i; j++)
1251 free (split_u8argv[j]);
1252 GNUNET_free (split_u8argv);
1254 return GNUNET_SYSERR;
1258 *u8argv = _make_continuous_arg_copy (wargc, split_u8argv);
1261 for (i = 0; i < wargc; i++)
1262 free (split_u8argv[i]);
1263 free (split_u8argv);
1266 char *const *new_argv = (char *const *) _make_continuous_arg_copy (argc, argv);
1273 /* end of strings.c */