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"
38 #define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
40 #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
44 * Fill a buffer of the given size with
45 * count 0-terminated strings (given as varargs).
46 * If "buffer" is NULL, only compute the amount of
47 * space required (sum of "strlen(arg)+1").
49 * Unlike using "snprintf" with "%s", this function
50 * will add 0-terminators after each string. The
51 * "GNUNET_string_buffer_tokenize" function can be
52 * used to parse the buffer back into individual
55 * @param buffer the buffer to fill with strings, can
56 * be NULL in which case only the necessary
57 * amount of space will be calculated
58 * @param size number of bytes available in buffer
59 * @param count number of strings that follow
60 * @param ... count 0-terminated strings to copy to buffer
61 * @return number of bytes written to the buffer
62 * (or number of bytes that would have been written)
65 GNUNET_STRINGS_buffer_fill (char *buffer, size_t size, unsigned int count, ...)
76 s = va_arg (ap, const char *);
78 slen = strlen (s) + 1;
81 GNUNET_assert (needed + slen <= size);
82 memcpy (&buffer[needed], s, slen);
93 * Given a buffer of a given size, find "count"
94 * 0-terminated strings in the buffer and assign
95 * the count (varargs) of type "const char**" to the
96 * locations of the respective strings in the
99 * @param buffer the buffer to parse
100 * @param size size of the buffer
101 * @param count number of strings to locate
102 * @return offset of the character after the last 0-termination
103 * in the buffer, or 0 on error.
106 GNUNET_STRINGS_buffer_tokenize (const char *buffer, size_t size,
107 unsigned int count, ...)
115 va_start (ap, count);
118 r = va_arg (ap, const char **);
121 while ((needed < size) && (buffer[needed] != '\0'))
126 return 0; /* error */
129 needed++; /* skip 0-termination */
138 * Convert a given filesize into a fancy human-readable format.
140 * @param size number of bytes
141 * @return fancy representation of the size (possibly rounded) for humans
144 GNUNET_STRINGS_byte_size_fancy (unsigned long long size)
146 const char *unit = _( /* size unit */ "b");
169 ret = GNUNET_malloc (32);
170 GNUNET_snprintf (ret, 32, "%llu %s", size, unit);
176 * Unit conversion table entry for 'convert_with_table'.
178 struct ConversionTable
181 * Name of the unit (or NULL for end of table).
186 * Factor to apply for this unit.
188 unsigned long long value;
193 * Convert a string of the form "4 X 5 Y" into a numeric value
194 * by interpreting "X" and "Y" as units and then multiplying
195 * the numbers with the values associated with the respective
196 * unit from the conversion table.
198 * @param input input string to parse
199 * @param table table with the conversion of unit names to numbers
200 * @param output where to store the result
201 * @return GNUNET_OK on success, GNUNET_SYSERR on error
204 convert_with_table (const char *input,
205 const struct ConversionTable *table,
206 unsigned long long *output)
208 unsigned long long ret;
211 unsigned long long last;
216 in = GNUNET_strdup (input);
217 for (tok = strtok (in, " "); tok != NULL; tok = strtok (NULL, " "))
220 while ((table[i].name != NULL) && (0 != strcasecmp (table[i].name, tok)))
222 if (table[i].name != NULL)
223 last *= table[i].value;
228 if (1 != SSCANF (tok, "%llu", &last))
231 return GNUNET_SYSERR; /* expected number */
243 * Convert a given fancy human-readable size to bytes.
245 * @param fancy_size human readable string (i.e. 1 MB)
246 * @param size set to the size in bytes
247 * @return GNUNET_OK on success, GNUNET_SYSERR on error
250 GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
251 unsigned long long *size)
253 static const struct ConversionTable table[] =
258 { "MiB", 1024 * 1024},
259 { "MB", 1000 * 1000},
260 { "GiB", 1024 * 1024 * 1024},
261 { "GB", 1000 * 1000 * 1000},
262 { "TiB", 1024LL * 1024LL * 1024LL * 1024LL},
263 { "TB", 1000LL * 1000LL * 1000LL * 1024LL},
264 { "PiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
265 { "PB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL},
266 { "EiB", 1024LL * 1024LL * 1024LL * 1024LL * 1024LL * 1024LL},
267 { "EB", 1000LL * 1000LL * 1000LL * 1024LL * 1000LL * 1000LL},
271 return convert_with_table (fancy_size,
278 * Convert a given fancy human-readable time to our internal
281 * @param fancy_time human readable string (i.e. 1 minute)
282 * @param rtime set to the relative time
283 * @return GNUNET_OK on success, GNUNET_SYSERR on error
286 GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
287 struct GNUNET_TIME_Relative *rtime)
289 static const struct ConversionTable table[] =
296 { "minutes", 60 * 1000},
298 { "h", 60 * 60 * 1000},
299 { "d", 24 * 60 * 60 * 1000},
300 { "day", 24 * 60 * 60 * 1000},
301 { "days", 24 * 60 * 60 * 1000},
302 { "a", 31536000000LL /* year */ },
306 unsigned long long val;
308 if (0 == strcasecmp ("forever", fancy_time))
310 *rtime = GNUNET_TIME_UNIT_FOREVER_REL;
313 ret = convert_with_table (fancy_time,
316 rtime->rel_value = (uint64_t) val;
322 * Convert a given fancy human-readable time to our internal
325 * @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
326 * @param atime set to the absolute time
327 * @return GNUNET_OK on success, GNUNET_SYSERR on error
330 GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
331 struct GNUNET_TIME_Absolute *atime)
336 if (0 == strcasecmp ("end of time", fancy_time))
338 *atime = GNUNET_TIME_UNIT_FOREVER_ABS;
341 memset (&tv, 0, sizeof (tv));
342 if ( (NULL == strptime (fancy_time, "%a %b %d %H:%M:%S %Y", &tv)) &&
343 (NULL == strptime (fancy_time, "%c", &tv)) &&
344 (NULL == strptime (fancy_time, "%Ec", &tv)) &&
345 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M:%S", &tv)) &&
346 (NULL == strptime (fancy_time, "%Y-%m-%d %H:%M", &tv)) &&
347 (NULL == strptime (fancy_time, "%x", &tv)) &&
348 (NULL == strptime (fancy_time, "%Ex", &tv)) &&
349 (NULL == strptime (fancy_time, "%Y-%m-%d", &tv)) &&
350 (NULL == strptime (fancy_time, "%Y-%m", &tv)) &&
351 (NULL == strptime (fancy_time, "%Y", &tv)) )
352 return GNUNET_SYSERR;
354 atime->abs_value = (uint64_t) ((uint64_t) t * 1000LL);
356 atime->abs_value -= 1000LL * timezone;
363 * Convert the len characters long character sequence
364 * given in input that is in the given input charset
365 * to a string in given output charset.
366 * @return the converted string (0-terminated),
367 * if conversion fails, a copy of the orignal
368 * string is returned.
371 GNUNET_STRINGS_conv (const char *input, size_t len, const char *input_charset, const char *output_charset)
375 #if ENABLE_NLS && HAVE_ICONV
382 cd = iconv_open (output_charset, input_charset);
383 if (cd == (iconv_t) - 1)
385 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv_open");
386 LOG (GNUNET_ERROR_TYPE_WARNING, _("Character sets requested were `%s'->`%s'\n"),
387 input_charset, output_charset);
388 ret = GNUNET_malloc (len + 1);
389 memcpy (ret, input, len);
393 tmpSize = 3 * len + 4;
394 tmp = GNUNET_malloc (tmpSize);
398 #if FREEBSD || DARWIN || WINDOWS
399 (const char **) &input,
403 &len, &itmp, &finSize) == SIZE_MAX)
405 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv");
408 ret = GNUNET_malloc (len + 1);
409 memcpy (ret, input, len);
413 ret = GNUNET_malloc (tmpSize - finSize + 1);
414 memcpy (ret, tmp, tmpSize - finSize);
415 ret[tmpSize - finSize] = '\0';
417 if (0 != iconv_close (cd))
418 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "iconv_close");
420 #elif ENABLE_NLS /* libunistring is a mandatory dependency \o/ ! */
422 char *encoded_string;
423 size_t u8_string_length;
424 size_t encoded_string_length;
426 u8_string = u8_conv_from_encoding (input_charset, iconveh_error, input, len, NULL, NULL, &u8_string_length);
427 if (NULL == u8_string)
429 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_from_encoding");
430 ret = GNUNET_malloc (len + 1);
431 memcpy (ret, input, len);
435 if (strcmp (output_charset, "UTF-8") == 0)
437 ret = GNUNET_malloc (u8_string_length + 1);
438 memcpy (ret, u8_string, u8_string_length);
439 ret[u8_string_length] = '\0';
443 encoded_string = u8_conv_to_encoding (output_charset, iconveh_error, u8_string, u8_string_length, NULL, NULL, &encoded_string_length);
445 if (NULL == encoded_string)
447 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "u8_conv_to_encoding");
448 ret = GNUNET_malloc (len + 1);
449 memcpy (ret, input, len);
453 ret = GNUNET_malloc (encoded_string_length + 1);
454 memcpy (ret, encoded_string, encoded_string_length);
455 ret[encoded_string_length] = '\0';
456 free (encoded_string);
459 ret = GNUNET_malloc (len + 1);
460 memcpy (ret, input, len);
468 * Convert the len characters long character sequence
469 * given in input that is in the given charset
471 * @return the converted string (0-terminated),
472 * if conversion fails, a copy of the orignal
473 * string is returned.
476 GNUNET_STRINGS_to_utf8 (const char *input, size_t len, const char *charset)
478 return GNUNET_STRINGS_conv (input, len, charset, "UTF-8");
483 * Convert the len bytes-long UTF-8 string
484 * given in input to the given charset.
486 * @return the converted string (0-terminated),
487 * if conversion fails, a copy of the orignal
488 * string is returned.
491 GNUNET_STRINGS_from_utf8 (const char *input, size_t len, const char *charset)
493 return GNUNET_STRINGS_conv (input, len, "UTF-8", charset);
498 * Convert the utf-8 input string to lowercase
499 * Output needs to be allocated appropriately
501 * @param input input string
502 * @param output output buffer
505 GNUNET_STRINGS_utf8_tolower(const char* input, char** output)
510 tmp_in = u8_tolower ((uint8_t*)input, strlen ((char *) input),
511 NULL, UNINORM_NFD, NULL, &len);
512 memcpy(*output, tmp_in, len);
513 (*output)[len] = '\0';
519 * Convert the utf-8 input string to uppercase
520 * Output needs to be allocated appropriately
522 * @param input input string
523 * @param output output buffer
526 GNUNET_STRINGS_utf8_toupper(const char* input, char** output)
531 tmp_in = u8_toupper ((uint8_t*)input, strlen ((char *) input),
532 NULL, UNINORM_NFD, NULL, &len);
533 memcpy(*output, tmp_in, len);
534 (*output)[len] = '\0';
540 * Complete filename (a la shell) from abbrevition.
541 * @param fil the name of the file, may contain ~/ or
542 * be relative to the current directory
543 * @returns the full file name,
544 * NULL is returned on error
547 GNUNET_STRINGS_filename_expand (const char *fil)
564 if (fil[0] == DIR_SEPARATOR)
565 /* absolute path, just copy */
566 return GNUNET_strdup (fil);
569 fm = getenv ("HOME");
572 LOG (GNUNET_ERROR_TYPE_WARNING,
573 _("Failed to expand `$HOME': environment variable `HOME' not set"));
576 fm = GNUNET_strdup (fm);
577 /* do not copy '~' */
580 /* skip over dir seperator to be consistent */
581 if (fil_ptr[0] == DIR_SEPARATOR)
592 buffer = GNUNET_malloc (len);
593 if (getcwd (buffer, len) != NULL)
598 if ((errno == ERANGE) && (len < 1024 * 1024 * 4))
601 GNUNET_free (buffer);
604 GNUNET_free (buffer);
609 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "getcwd");
610 buffer = getenv ("PWD"); /* alternative */
612 fm = GNUNET_strdup (buffer);
615 fm = GNUNET_strdup ("./"); /* give up */
617 n = strlen (fm) + 1 + strlen (fil_ptr) + 1;
618 buffer = GNUNET_malloc (n);
619 GNUNET_snprintf (buffer, n, "%s%s%s", fm,
620 (fm[strlen (fm) - 1] ==
621 DIR_SEPARATOR) ? "" : DIR_SEPARATOR_STR, fil_ptr);
625 fn = GNUNET_malloc (MAX_PATH + 1);
627 if ((lRet = plibc_conv_to_win_path (fil, fn)) != ERROR_SUCCESS)
629 SetErrnoFromWinError (lRet);
630 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "plibc_conv_to_win_path");
633 /* is the path relative? */
634 if ((strncmp (fn + 1, ":\\", 2) != 0) && (strncmp (fn, "\\\\", 2) != 0))
636 char szCurDir[MAX_PATH + 1];
638 lRet = GetCurrentDirectory (MAX_PATH + 1, szCurDir);
639 if (lRet + strlen (fn) + 1 > (MAX_PATH + 1))
641 SetErrnoFromWinError (ERROR_BUFFER_OVERFLOW);
642 LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "GetCurrentDirectory");
645 buffer = GNUNET_malloc (MAX_PATH + 1);
646 GNUNET_snprintf (buffer, MAX_PATH + 1, "%s\\%s", szCurDir, fn);
657 * Give relative time in human-readable fancy format.
658 * This is one of the very few calls in the entire API that is
661 * @param delta time in milli seconds
662 * @param do_round are we allowed to round a bit?
663 * @return time as human-readable string
666 GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
669 static char buf[128];
670 const char *unit = _( /* time unit */ "ms");
671 uint64_t dval = delta.rel_value;
673 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value == delta.rel_value)
675 if (0 == delta.rel_value)
677 if ( ( (GNUNET_YES == do_round) &&
678 (dval > 5 * 1000) ) ||
679 (0 == (dval % 1000) ))
682 unit = _( /* time unit */ "s");
683 if ( ( (GNUNET_YES == do_round) &&
685 (0 == (dval % 60) ) )
688 unit = _( /* time unit */ "m");
689 if ( ( (GNUNET_YES == do_round) &&
694 unit = _( /* time unit */ "h");
695 if ( ( (GNUNET_YES == do_round) &&
701 unit = _( /* time unit */ "day");
703 unit = _( /* time unit */ "days");
708 GNUNET_snprintf (buf, sizeof (buf),
709 "%llu %s", dval, unit);
715 * "asctime", except for GNUnet time.
716 * This is one of the very few calls in the entire API that is
719 * @param t time to convert
720 * @return absolute time in human-readable format
723 GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t)
725 static char buf[255];
729 if (t.abs_value == GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
730 return _("end of time");
731 tt = t.abs_value / 1000;
733 strftime (buf, sizeof (buf), "%a %b %d %H:%M:%S %Y", tp);
740 * Returns a pointer to a part of filename (allocates nothing)!
742 * @param filename filename to extract basename from
743 * @return short (base) name of the file (that is, everything following the
744 * last directory separator in filename. If filename ends with a
745 * directory separator, the result will be a zero-length string.
746 * If filename has no directory separators, the result is filename
750 GNUNET_STRINGS_get_short_name (const char *filename)
752 const char *short_fn = filename;
754 while (NULL != (ss = strstr (short_fn, DIR_SEPARATOR_STR))
762 * Get the numeric value corresponding to a character.
764 * @param a a character
765 * @return corresponding numeric value
768 getValue__ (unsigned char a)
770 if ((a >= '0') && (a <= '9'))
772 if ((a >= 'A') && (a <= 'V'))
773 return (a - 'A' + 10);
779 * Convert binary data to ASCII encoding. The ASCII encoding is rather
780 * GNUnet specific. It was chosen such that it only uses characters
781 * in [0-9A-V], can be produced without complex arithmetics and uses a
782 * small number of characters.
783 * Does not append 0-terminator, but returns a pointer to the place where
784 * it should be placed, if needed.
786 * @param data data to encode
787 * @param size size of data (in bytes)
788 * @param out buffer to fill
789 * @param out_size size of the buffer. Must be large enough to hold
790 * ((size*8) + (((size*8) % 5) > 0 ? 5 - ((size*8) % 5) : 0)) / 5 bytes
791 * @return pointer to the next byte in 'out' or NULL on error.
794 GNUNET_STRINGS_data_to_string (const unsigned char *data, size_t size, char *out, size_t out_size)
797 * 32 characters for encoding
799 static char *encTable__ = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
805 GNUNET_assert (data != NULL);
806 GNUNET_assert (out != NULL);
807 if (out_size < (((size*8) + ((size*8) % 5)) % 5))
816 while ((rpos < size) || (vbit > 0))
818 if ((rpos < size) && (vbit < 5))
820 bits = (bits << 8) | data[rpos++]; /* eat 8 more bits */
825 bits <<= (5 - vbit); /* zero-padding */
826 GNUNET_assert (vbit == ((size * 8) % 5));
829 if (wpos >= out_size)
834 out[wpos++] = encTable__[(bits >> (vbit - 5)) & 31];
837 if (wpos != out_size)
842 GNUNET_assert (vbit == 0);
848 * Convert ASCII encoding back to data
849 * out_size must match exactly the size of the data before it was encoded.
851 * @param enc the encoding
852 * @param enclen number of characters in 'enc' (without 0-terminator, which can be missing)
853 * @param out location where to store the decoded data
854 * @param out_size sizeof the output buffer
855 * @return GNUNET_OK on success, GNUNET_SYSERR if result has the wrong encoding
858 GNUNET_STRINGS_string_to_data (const char *enc, size_t enclen,
859 unsigned char *out, size_t out_size)
867 int encoded_len = out_size * 8;
868 if (encoded_len % 5 > 0)
870 vbit = encoded_len % 5; /* padding! */
878 if ((encoded_len + shift) / 5 != enclen)
879 return GNUNET_SYSERR;
883 bits = (ret = getValue__ (enc[--rpos])) >> (5 - encoded_len % 5);
885 return GNUNET_SYSERR;
888 GNUNET_assert (rpos > 0);
889 bits = ((ret = getValue__ (enc[--rpos])) << vbit) | bits;
891 return GNUNET_SYSERR;
895 out[--wpos] = (unsigned char) bits;
900 GNUNET_assert (rpos == 0);
901 GNUNET_assert (vbit == 0);
907 * Parse a path that might be an URI.
909 * @param path path to parse. Must be NULL-terminated.
910 * @param scheme_part a pointer to 'char *' where a pointer to a string that
911 * represents the URI scheme will be stored. Can be NULL. The string is
912 * allocated by the function, and should be freed by GNUNET_free() when
913 * it is no longer needed.
914 * @param path_part a pointer to 'const char *' where a pointer to the path
915 * part of the URI will be stored. Can be NULL. Points to the same block
916 * of memory as 'path', and thus must not be freed. Might point to '\0',
917 * if path part is zero-length.
918 * @return GNUNET_YES if it's an URI, GNUNET_NO otherwise. If 'path' is not
919 * an URI, '* scheme_part' and '*path_part' will remain unchanged
920 * (if they weren't NULL).
923 GNUNET_STRINGS_parse_uri (const char *path, char **scheme_part,
924 const char **path_part)
929 const char *post_scheme_part = NULL;
931 for (end = 0, i = 0; !end && i < len; i++)
936 if (path[i] == ':' && i > 0)
941 if (!((path[i] >= 'A' && path[i] <= 'Z') || (path[i] >= 'a' && path[i] <= 'z')
942 || (path[i] >= '0' && path[i] <= '9') || path[i] == '+' || path[i] == '-'
943 || (path[i] == '.')))
956 post_scheme_part = &path[i];
963 if (post_scheme_part == NULL)
967 *scheme_part = GNUNET_malloc (post_scheme_part - path + 1);
968 memcpy (*scheme_part, path, post_scheme_part - path);
969 (*scheme_part)[post_scheme_part - path] = '\0';
972 *path_part = post_scheme_part;
978 * Check whether 'filename' is absolute or not, and if it's an URI
980 * @param filename filename to check
981 * @param can_be_uri GNUNET_YES to check for being URI, GNUNET_NO - to
982 * assume it's not URI
983 * @param r_is_uri a pointer to an int that is set to GNUNET_YES if 'filename'
984 * is URI and to GNUNET_NO otherwise. Can be NULL. If 'can_be_uri' is
985 * not GNUNET_YES, *r_is_uri is set to GNUNET_NO.
986 * @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
987 * The string is allocated by the function, and should be freed with
988 * GNUNET_free (). Can be NULL.
989 * @return GNUNET_YES if 'filename' is absolute, GNUNET_NO otherwise.
992 GNUNET_STRINGS_path_is_absolute (const char *filename, int can_be_uri,
993 int *r_is_uri, char **r_uri_scheme)
998 const char *post_scheme_path;
1001 /* consider POSIX paths to be absolute too, even on W32,
1002 * as plibc expansion will fix them for us.
1004 if (filename[0] == '/')
1008 is_uri = GNUNET_STRINGS_parse_uri (filename, &uri, &post_scheme_path);
1014 *r_uri_scheme = uri;
1016 GNUNET_free_non_null (uri);
1018 len = strlen(post_scheme_path);
1019 /* Special check for file:///c:/blah
1020 * We want to parse 'c:/', not '/c:/'
1022 if (post_scheme_path[0] == '/' && len >= 3 && post_scheme_path[2] == ':')
1023 post_scheme_path = &post_scheme_path[1];
1025 return GNUNET_STRINGS_path_is_absolute (post_scheme_path, GNUNET_NO, NULL, NULL);
1031 *r_is_uri = GNUNET_NO;
1034 len = strlen (filename);
1036 ((filename[0] >= 'A' && filename[0] <= 'Z')
1037 || (filename[0] >= 'a' && filename[0] <= 'z'))
1038 && filename[1] == ':' && (filename[2] == '/' || filename[2] == '\\'))
1045 #define _IFMT 0170000 /* type of file */
1046 #define _IFLNK 0120000 /* symbolic link */
1047 #define S_ISLNK(m) (((m)&_IFMT) == _IFLNK)
1052 * Perform 'checks' on 'filename'
1054 * @param filename file to check
1055 * @param checks checks to perform
1056 * @return GNUNET_YES if all checks pass, GNUNET_NO if at least one of them
1057 * fails, GNUNET_SYSERR when a check can't be performed
1060 GNUNET_STRINGS_check_filename (const char *filename,
1061 enum GNUNET_STRINGS_FilenameCheck checks)
1064 if ( (NULL == filename) || (filename[0] == '\0') )
1065 return GNUNET_SYSERR;
1066 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_ABSOLUTE))
1067 if (!GNUNET_STRINGS_path_is_absolute (filename, GNUNET_NO, NULL, NULL))
1069 if (0 != (checks & (GNUNET_STRINGS_CHECK_EXISTS
1070 | GNUNET_STRINGS_CHECK_IS_DIRECTORY
1071 | GNUNET_STRINGS_CHECK_IS_LINK)))
1073 if (0 != STAT (filename, &st))
1075 if (0 != (checks & GNUNET_STRINGS_CHECK_EXISTS))
1078 return GNUNET_SYSERR;
1081 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_DIRECTORY))
1082 if (!S_ISDIR (st.st_mode))
1084 if (0 != (checks & GNUNET_STRINGS_CHECK_IS_LINK))
1085 if (!S_ISLNK (st.st_mode))
1092 * Tries to convert 'zt_addr' string to an IPv6 address.
1093 * The string is expected to have the format "[ABCD::01]:80".
1095 * @param zt_addr 0-terminated string. May be mangled by the function.
1096 * @param addrlen length of zt_addr (not counting 0-terminator).
1097 * @param r_buf a buffer to fill. Initially gets filled with zeroes,
1098 * then its sin6_port, sin6_family and sin6_addr are set appropriately.
1099 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1100 * case the contents of r_buf are undefined.
1103 GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
1105 struct sockaddr_in6 *r_buf)
1107 char zbuf[addrlen + 1];
1113 return GNUNET_SYSERR;
1114 memcpy (zbuf, zt_addr, addrlen);
1117 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1118 _("IPv6 address did not start with `['\n"));
1119 return GNUNET_SYSERR;
1121 zbuf[addrlen] = '\0';
1122 port_colon = strrchr (zbuf, ':');
1123 if (NULL == port_colon)
1125 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1126 _("IPv6 address did contain ':' to separate port number\n"));
1127 return GNUNET_SYSERR;
1129 if (']' != *(port_colon - 1))
1131 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1132 _("IPv6 address did contain ']' before ':' to separate port number\n"));
1133 return GNUNET_SYSERR;
1135 ret = SSCANF (port_colon, ":%u", &port);
1136 if ( (1 != ret) || (port > 65535) )
1138 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1139 _("IPv6 address did contain a valid port number after the last ':'\n"));
1140 return GNUNET_SYSERR;
1142 *(port_colon-1) = '\0';
1143 memset (r_buf, 0, sizeof (struct sockaddr_in6));
1144 ret = inet_pton (AF_INET6, &zbuf[1], &r_buf->sin6_addr);
1147 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1148 _("Invalid IPv6 address `%s': %s\n"),
1151 return GNUNET_SYSERR;
1153 r_buf->sin6_port = htons (port);
1154 r_buf->sin6_family = AF_INET6;
1155 #if HAVE_SOCKADDR_IN_SIN_LEN
1156 r_buf->sin6_len = (u_char) sizeof (struct sockaddr_in6);
1163 * Tries to convert 'zt_addr' string to an IPv4 address.
1164 * The string is expected to have the format "1.2.3.4:80".
1166 * @param zt_addr 0-terminated string. May be mangled by the function.
1167 * @param addrlen length of zt_addr (not counting 0-terminator).
1168 * @param r_buf a buffer to fill.
1169 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which case
1170 * the contents of r_buf are undefined.
1173 GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr, uint16_t addrlen,
1174 struct sockaddr_in *r_buf)
1176 unsigned int temps[4];
1181 return GNUNET_SYSERR;
1182 cnt = SSCANF (zt_addr, "%u.%u.%u.%u:%u", &temps[0], &temps[1], &temps[2], &temps[3], &port);
1184 return GNUNET_SYSERR;
1185 for (cnt = 0; cnt < 4; cnt++)
1186 if (temps[cnt] > 0xFF)
1187 return GNUNET_SYSERR;
1189 return GNUNET_SYSERR;
1190 r_buf->sin_family = AF_INET;
1191 r_buf->sin_port = htons (port);
1192 r_buf->sin_addr.s_addr = htonl ((temps[0] << 24) + (temps[1] << 16) +
1193 (temps[2] << 8) + temps[3]);
1194 #if HAVE_SOCKADDR_IN_SIN_LEN
1195 r_buf->sin_len = (u_char) sizeof (struct sockaddr_in);
1202 * Tries to convert 'addr' string to an IP (v4 or v6) address.
1203 * Will automatically decide whether to treat 'addr' as v4 or v6 address.
1205 * @param addr a string, may not be 0-terminated.
1206 * @param addrlen number of bytes in addr (if addr is 0-terminated,
1207 * 0-terminator should not be counted towards addrlen).
1208 * @param r_buf a buffer to fill.
1209 * @return GNUNET_OK if conversion succeded. GNUNET_SYSERR otherwise, in which
1210 * case the contents of r_buf are undefined.
1213 GNUNET_STRINGS_to_address_ip (const char *addr,
1215 struct sockaddr_storage *r_buf)
1218 return GNUNET_STRINGS_to_address_ipv6 (addr, addrlen, (struct sockaddr_in6 *) r_buf);
1219 return GNUNET_STRINGS_to_address_ipv4 (addr, addrlen, (struct sockaddr_in *) r_buf);
1224 * Makes a copy of argv that consists of a single memory chunk that can be
1225 * freed with a single call to GNUNET_free ();
1227 static char *const *
1228 _make_continuous_arg_copy (int argc, char *const *argv)
1230 size_t argvsize = 0;
1234 for (i = 0; i < argc; i++)
1235 argvsize += strlen (argv[i]) + 1 + sizeof (char *);
1236 new_argv = GNUNET_malloc (argvsize + sizeof (char *));
1237 p = (char *) &new_argv[argc + 1];
1238 for (i = 0; i < argc; i++)
1241 strcpy (p, argv[i]);
1242 p += strlen (argv[i]) + 1;
1244 new_argv[argc] = NULL;
1245 return (char *const *) new_argv;
1250 * Returns utf-8 encoded arguments.
1251 * Does nothing (returns a copy of argc and argv) on any platform
1253 * Returned argv has u8argv[u8argc] == NULL.
1254 * Returned argv is a single memory block, and can be freed with a single
1255 * GNUNET_free () call.
1257 * @param argc argc (as given by main())
1258 * @param argv argv (as given by main())
1259 * @param u8argc a location to store new argc in (though it's th same as argc)
1260 * @param u8argv a location to store new argv in
1261 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
1264 GNUNET_STRINGS_get_utf8_args (int argc, char *const *argv, int *u8argc, char *const **u8argv)
1271 char **split_u8argv;
1273 wcmd = GetCommandLineW ();
1275 return GNUNET_SYSERR;
1276 wargv = CommandLineToArgvW (wcmd, &wargc);
1278 return GNUNET_SYSERR;
1280 split_u8argv = GNUNET_malloc (argc * sizeof (char *));
1282 for (i = 0; i < wargc; i++)
1285 /* Hopefully it will allocate us NUL-terminated strings... */
1286 split_u8argv[i] = (char *) u16_to_u8 (wargv[i], wcslen (wargv[i]) + 1, NULL, &strl);
1287 if (split_u8argv == NULL)
1290 for (j = 0; j < i; j++)
1291 free (split_u8argv[j]);
1292 GNUNET_free (split_u8argv);
1294 return GNUNET_SYSERR;
1298 *u8argv = _make_continuous_arg_copy (wargc, split_u8argv);
1301 for (i = 0; i < wargc; i++)
1302 free (split_u8argv[i]);
1303 free (split_u8argv);
1306 char *const *new_argv = (char *const *) _make_continuous_arg_copy (argc, argv);
1313 /* end of strings.c */