X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Finclude%2Fgnunet_strings_lib.h;h=9962160f2ace023d6492d1b6d6473a0c0ff42306;hb=6e626937fd5133188d2bd06f280a1b889219eef2;hp=98d2ed396c60f148244f6c322f22c887f208f92d;hpb=0a217a8df1657b4334b55b0e4a6c7837a8dbcfd9;p=oweals%2Fgnunet.git
diff --git a/src/include/gnunet_strings_lib.h b/src/include/gnunet_strings_lib.h
index 98d2ed396..9962160f2 100644
--- a/src/include/gnunet_strings_lib.h
+++ b/src/include/gnunet_strings_lib.h
@@ -1,33 +1,36 @@
/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2001-2013 GNUnet e.V.
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
- option) any later version.
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Affero General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see .
+
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
- * @file include/gnunet_strings_lib.h
- * @brief strings and string handling functions (including malloc
- * and string tokenizing)
- *
* @author Christian Grothoff
* @author Krista Bennett
* @author Gerd Knorr
* @author Ioana Patrascu
* @author Tzvetan Horozov
+ *
+ * @file
+ * Strings and string handling functions
+ *
+ * @defgroup strings Strings library
+ * Strings and string handling functions, including malloc and string tokenizing.
+ * @{
*/
#ifndef GNUNET_STRINGS_LIB_H
@@ -50,82 +53,595 @@ extern "C"
#include "gnunet_time_lib.h"
+/**
+ * Convert a given fancy human-readable size to bytes.
+ *
+ * @param fancy_size human readable string (i.e. 1 MB)
+ * @param size set to the size in bytes
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_STRINGS_fancy_size_to_bytes (const char *fancy_size,
+ unsigned long long *size);
+
+
+/**
+ * Convert a given fancy human-readable time to our internal
+ * representation.
+ *
+ * @param fancy_time human readable string (i.e. 1 minute)
+ * @param rtime set to the relative time
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_STRINGS_fancy_time_to_relative (const char *fancy_time,
+ struct GNUNET_TIME_Relative *rtime);
+
+
+/**
+ * @ingroup time
+ * Convert a given fancy human-readable time to our internal
+ * representation. The human-readable time is expected to be
+ * in local time, whereas the returned value will be in UTC.
+ *
+ * @param fancy_time human readable string (i.e. %Y-%m-%d %H:%M:%S)
+ * @param atime set to the absolute time
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_STRINGS_fancy_time_to_absolute (const char *fancy_time,
+ struct GNUNET_TIME_Absolute *atime);
+
+
/**
* Convert a given filesize into a fancy human-readable format.
+ *
+ * @param size number of bytes
+ * @return fancy representation of the size (possibly rounded) for humans
*/
-char *GNUNET_STRINGS_byte_size_fancy (unsigned long long size);
+char *
+GNUNET_STRINGS_byte_size_fancy (unsigned long long size);
+
+
+/**
+ * Convert the len characters long character sequence
+ * given in input that is in the given input charset
+ * to a string in given output charset.
+ *
+ * @param input input string
+ * @param len number of bytes in @a input
+ * @param input_charset character set used for @a input
+ * @param output_charset desired character set for the return value
+ * @return the converted string (0-terminated),
+ * if conversion fails, a copy of the orignal
+ * string is returned.
+ */
+char *
+GNUNET_STRINGS_conv (const char *input, size_t len,
+ const char *input_charset,
+ const char *output_charset);
+
/**
* Convert the len characters long character sequence
* given in input that is in the given charset
* to UTF-8.
*
+ * @param input the input string (not necessarily 0-terminated)
+ * @param len the number of bytes in the @a input
+ * @param charset character set to convert from
* @return the converted string (0-terminated)
*/
-char *GNUNET_STRINGS_to_utf8 (const char *input,
- size_t len, const char *charset);
+char *
+GNUNET_STRINGS_to_utf8 (const char *input,
+ size_t len,
+ const char *charset);
+
+
+/**
+ * Convert the len bytes-long UTF-8 string
+ * given in input to the given charset.
+ *
+ * @param input the input string (not necessarily 0-terminated)
+ * @param len the number of bytes in the @a input
+ * @param charset character set to convert to
+ * @return the converted string (0-terminated),
+ * if conversion fails, a copy of the orignal
+ * string is returned.
+ */
+char *
+GNUNET_STRINGS_from_utf8 (const char *input,
+ size_t len,
+ const char *charset);
+
+
+/**
+ * Convert the utf-8 input string to lower case.
+ * Output needs to be allocated appropriately.
+ *
+ * @param input input string
+ * @param output output buffer
+ */
+void
+GNUNET_STRINGS_utf8_tolower (const char *input,
+ char *output);
+
+
+/**
+ * Convert the utf-8 input string to upper case.
+ * Output needs to be allocated appropriately.
+ *
+ * @param input input string
+ * @param output output buffer
+ */
+void
+GNUNET_STRINGS_utf8_toupper (const char *input,
+ char *output);
+
/**
* Complete filename (a la shell) from abbrevition.
*
* @param fil the name of the file, may contain ~/ or
* be relative to the current directory
- * @returns the full file name,
+ * @return the full file name,
* NULL is returned on error
*/
-char *GNUNET_STRINGS_filename_expand (const char *fil);
+char *
+GNUNET_STRINGS_filename_expand (const char *fil);
+
/**
- * Fill a buffer of the given size with
- * count 0-terminated strings (given as varargs).
- * If "buffer" is NULL, only compute the amount of
- * space required (sum of "strlen(arg)+1").
+ * Fill a buffer of the given size with count 0-terminated strings
+ * (given as varargs). If "buffer" is NULL, only compute the amount
+ * of space required (sum of "strlen(arg)+1").
*
- * Unlike using "snprintf" with "%s", this function
- * will add 0-terminators after each string. The
- * "GNUNET_string_buffer_tokenize" function can be
- * used to parse the buffer back into individual
- * strings.
+ * Unlike using "snprintf" with "%s", this function will add
+ * 0-terminators after each string. The
+ * "GNUNET_string_buffer_tokenize" function can be used to parse the
+ * buffer back into individual strings.
*
+ * @param buffer the buffer to fill with strings, can
+ * be NULL in which case only the necessary
+ * amount of space will be calculated
+ * @param size number of bytes available in buffer
+ * @param count number of strings that follow
+ * @param ... count 0-terminated strings to copy to buffer
* @return number of bytes written to the buffer
* (or number of bytes that would have been written)
*/
-unsigned int GNUNET_STRINGS_buffer_fill (char *buffer,
- unsigned int size,
- unsigned int count, ...);
+size_t
+GNUNET_STRINGS_buffer_fill (char *buffer,
+ size_t size,
+ unsigned int count,
+ ...);
+
/**
- * Given a buffer of a given size, find "count"
- * 0-terminated strings in the buffer and assign
- * the count (varargs) of type "const char**" to the
- * locations of the respective strings in the
- * buffer.
+ * Given a buffer of a given size, find "count" 0-terminated strings
+ * in the buffer and assign the count (varargs) of type "const char**"
+ * to the locations of the respective strings in the buffer.
*
- * @param buffer the buffer to parse
- * @param size size of the buffer
+ * @param buffer the buffer to parse FIXME: not 'const', is it?
+ * @param size size of the @a buffer
* @param count number of strings to locate
+ * @param ... pointers to where to store the strings
* @return offset of the character after the last 0-termination
* in the buffer, or 0 on error.
*/
-unsigned int GNUNET_STRINGS_buffer_tokenize (const char *buffer,
- unsigned int size,
- unsigned int count, ...);
+unsigned int
+GNUNET_STRINGS_buffer_tokenize (const char *buffer,
+ size_t size,
+ unsigned int count, ...);
/**
- * "man ctime_r", except for GNUnet time; also, unlike ctime, the
- * return value does not include the newline character.
+ * @ingroup time
+ * Like `asctime`, except for GNUnet time. Converts a GNUnet internal
+ * absolute time (which is in UTC) to a string in local time.
+ * Note that the returned value will be overwritten if this function
+ * is called again.
+ *
+ * @param t the absolute time to convert
+ * @return timestamp in human-readable form in local time
*/
-char *GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t);
+const char *
+GNUNET_STRINGS_absolute_time_to_string (struct GNUNET_TIME_Absolute t);
/**
+ * @ingroup time
* Give relative time in human-readable fancy format.
+ * This is one of the very few calls in the entire API that is
+ * NOT reentrant!
+ *
* @param delta time in milli seconds
+ * @param do_round are we allowed to round a bit?
+ * @return string in human-readable form
+ */
+const char *
+GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative delta,
+ int do_round);
+
+
+/**
+ * "man basename"
+ * Returns a pointer to a part of filename (allocates nothing)!
+ *
+ * @param filename filename to extract basename from
+ * @return short (base) name of the file (that is, everything following the
+ * last directory separator in filename. If filename ends with a
+ * directory separator, the result will be a zero-length string.
+ * If filename has no directory separators, the result is filename
+ * itself.
+ */
+const char *
+GNUNET_STRINGS_get_short_name (const char *filename);
+
+
+/**
+ * Convert binary data to ASCII encoding using CrockfordBase32.
+ * Does not append 0-terminator, but returns a pointer to the place where
+ * it should be placed, if needed.
+ *
+ * @param data data to encode
+ * @param size size of data (in bytes)
+ * @param out buffer to fill
+ * @param out_size size of the buffer. Must be large enough to hold
+ * ((size*8) + (((size*8) % 5) > 0 ? 5 - ((size*8) % 5) : 0)) / 5
+ * @return pointer to the next byte in 'out' or NULL on error.
*/
-char *GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative
- delta);
+char *
+GNUNET_STRINGS_data_to_string (const void *data,
+ size_t size,
+ char *out,
+ size_t out_size);
+
+
+/**
+ * Return the base32crockford encoding of the given buffer.
+ *
+ * The returned string will be freshly allocated, and must be free'd
+ * with #GNUNET_free().
+ *
+ * @param buf buffer with data
+ * @param size size of the buffer @a buf
+ * @return freshly allocated, null-terminated string
+ */
+char *
+GNUNET_STRINGS_data_to_string_alloc (const void *buf,
+ size_t size);
+
+
+/**
+ * Convert CrockfordBase32 encoding back to data.
+ * @a out_size must match exactly the size of the data before it was encoded.
+ *
+ * @param enc the encoding
+ * @param enclen number of characters in @a enc (without 0-terminator, which can be missing)
+ * @param out location where to store the decoded data
+ * @param out_size size of the output buffer @a out
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR if result has the wrong encoding
+ */
+int
+GNUNET_STRINGS_string_to_data (const char *enc,
+ size_t enclen,
+ void *out,
+ size_t out_size);
+
+
+/**
+ * Encode into Base64.
+ *
+ * @param data the data to encode
+ * @param len the length of the input
+ * @param output where to write the output (*output should be NULL,
+ * is allocated)
+ * @return the size of the output
+ */
+size_t
+GNUNET_STRINGS_base64_encode (const void *in,
+ size_t len,
+ char **output);
+
+
+/**
+ * Decode from Base64.
+ *
+ * @param data the data to encode
+ * @param len the length of the input
+ * @param[out] output where to write the output (*output should be NULL,
+ * is allocated)
+ * @return the size of the output
+ */
+size_t
+GNUNET_STRINGS_base64_decode (const char *data,
+ size_t len,
+ void **output);
+
+
+/**
+ * Convert a peer path to a human-readable string.
+ *
+ * @param pids array of PIDs to convert to a string
+ * @param num_pids length of the @a pids array
+ * @return string representing the array of @a pids
+ */
+char *
+GNUNET_STRINGS_pp2s (const struct GNUNET_PeerIdentity *pids,
+ unsigned int num_pids);
+
+
+/**
+ * Parse a path that might be an URI.
+ *
+ * @param path path to parse. Must be NULL-terminated.
+ * @param[out] scheme_part pointer to a string that
+ * represents the URI scheme will be stored. Can be NULL. The string is
+ * allocated by the function, and should be freed by GNUNET_free() when
+ * it is no longer needed.
+ * @param path_part a pointer to 'const char *' where a pointer to the path
+ * part of the URI will be stored. Can be NULL. Points to the same block
+ * of memory as @a path, and thus must not be freed. Might point to '\0',
+ * if path part is zero-length.
+ * @return #GNUNET_YES if it's an URI, #GNUNET_NO otherwise. If 'path' is not
+ * an URI, '* scheme_part' and '*path_part' will remain unchanged
+ * (if they weren't NULL).
+ */
+int
+GNUNET_STRINGS_parse_uri (const char *path,
+ char **scheme_part,
+ const char **path_part);
+
+
+/**
+ * Check whether filename is absolute or not, and if it's an URI
+ *
+ * @param filename filename to check
+ * @param can_be_uri #GNUNET_YES to check for being URI, #GNUNET_NO - to
+ * assume it's not URI
+ * @param r_is_uri a pointer to an int that is set to #GNUNET_YES if 'filename'
+ * is URI and to GNUNET_NO otherwise. Can be NULL. If 'can_be_uri' is
+ * not #GNUNET_YES, *r_is_uri is set to #GNUNET_NO.
+ * @param r_uri_scheme a pointer to a char * that is set to a pointer to URI scheme.
+ * The string is allocated by the function, and should be freed with
+ * GNUNET_free (). Can be NULL.
+ * @return #GNUNET_YES if 'filename' is absolute, #GNUNET_NO otherwise.
+ */
+int
+GNUNET_STRINGS_path_is_absolute (const char *filename,
+ int can_be_uri,
+ int *r_is_uri,
+ char **r_uri_scheme);
+
+
+/**
+ * Flags for what we should check a file for.
+ */
+enum GNUNET_STRINGS_FilenameCheck
+{
+ /**
+ * Check that it exists.
+ */
+ GNUNET_STRINGS_CHECK_EXISTS = 0x00000001,
+
+ /**
+ * Check that it is a directory.
+ */
+ GNUNET_STRINGS_CHECK_IS_DIRECTORY = 0x00000002,
+
+ /**
+ * Check that it is a link.
+ */
+ GNUNET_STRINGS_CHECK_IS_LINK = 0x00000004,
+
+ /**
+ * Check that the path is an absolute path.
+ */
+ GNUNET_STRINGS_CHECK_IS_ABSOLUTE = 0x00000008
+};
+
+
+/**
+ * Perform checks on @a filename. FIXME: some duplication with
+ * "GNUNET_DISK_"-APIs. We should unify those.
+ *
+ * @param filename file to check
+ * @param checks checks to perform
+ * @return #GNUNET_YES if all checks pass, #GNUNET_NO if at least one of them
+ * fails, #GNUNET_SYSERR when a check can't be performed
+ */
+int
+GNUNET_STRINGS_check_filename (const char *filename,
+ enum GNUNET_STRINGS_FilenameCheck checks);
+
+
+/**
+ * Tries to convert @a zt_addr string to an IPv6 address.
+ * The string is expected to have the format "[ABCD::01]:80".
+ *
+ * @param zt_addr 0-terminated string. May be mangled by the function.
+ * @param addrlen length of zt_addr (not counting 0-terminator).
+ * @param r_buf a buffer to fill. Initially gets filled with zeroes,
+ * then its sin6_port, sin6_family and sin6_addr are set appropriately.
+ * @return #GNUNET_OK if conversion succeded. #GNUNET_SYSERR otherwise, in which
+ * case the contents of r_buf are undefined.
+ */
+int
+GNUNET_STRINGS_to_address_ipv6 (const char *zt_addr,
+ uint16_t addrlen,
+ struct sockaddr_in6 *r_buf);
+
+
+/**
+ * Tries to convert @a zt_addr string to an IPv4 address.
+ * The string is expected to have the format "1.2.3.4:80".
+ *
+ * @param zt_addr 0-terminated string. May be mangled by the function.
+ * @param addrlen length of zt_addr (not counting 0-terminator).
+ * @param r_buf a buffer to fill.
+ * @return #GNUNET_OK if conversion succeded. #GNUNET_SYSERR otherwise, in which case
+ * the contents of r_buf are undefined.
+ */
+int
+GNUNET_STRINGS_to_address_ipv4 (const char *zt_addr,
+ uint16_t addrlen,
+ struct sockaddr_in *r_buf);
+
+
+/**
+ * Parse an address given as a string into a
+ * `struct sockaddr`.
+ *
+ * @param addr the address
+ * @param[out] af set to the parsed address family (i.e. AF_INET)
+ * @param[out] sa set to the parsed address
+ * @return 0 on error, otherwise number of bytes in @a sa
+ */
+size_t
+GNUNET_STRINGS_parse_socket_addr (const char *addr,
+ uint8_t *af,
+ struct sockaddr **sa);
+
+
+/**
+ * Tries to convert @a addr string to an IP (v4 or v6) address.
+ * Will automatically decide whether to treat 'addr' as v4 or v6 address.
+ *
+ * @param addr a string, may not be 0-terminated.
+ * @param addrlen number of bytes in @a addr (if addr is 0-terminated,
+ * 0-terminator should not be counted towards addrlen).
+ * @param r_buf a buffer to fill.
+ * @return #GNUNET_OK if conversion succeded. #GNUNET_SYSERR otherwise, in which
+ * case the contents of r_buf are undefined.
+ */
+int
+GNUNET_STRINGS_to_address_ip (const char *addr,
+ uint16_t addrlen,
+ struct sockaddr_storage *r_buf);
+
+
+/**
+ * Returns utf-8 encoded arguments. Does nothing (returns a copy of
+ * @a argc and @a argv) on any platform other than W32. Returned @a
+ * argv has `u8argv[u8argc] == NULL`. Returned @a argv is a single
+ * memory block, and can be freed with a single GNUNET_free() call.
+ *
+ * @param argc argc (as given by main())
+ * @param argv argv (as given by main())
+ * @param u8argc a location to store new argc in (though it's th same as argc)
+ * @param u8argv a location to store new argv in
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
+ */
+int
+GNUNET_STRINGS_get_utf8_args (int argc,
+ char *const *argv,
+ int *u8argc,
+ char *const **u8argv);
+
+
+/* ***************** IPv4/IPv6 parsing ****************** */
+
+struct GNUNET_STRINGS_PortPolicy
+{
+
+ /**
+ * Starting port range (0 if none given).
+ */
+ uint16_t start_port;
+
+ /**
+ * End of port range (0 if none given).
+ */
+ uint16_t end_port;
+
+ /**
+ * #GNUNET_YES if the port range should be negated
+ * ("!" in policy).
+ */
+ int negate_portrange;
+
+};
+
+
+/**
+ * @brief IPV4 network in CIDR notation.
+ */
+struct GNUNET_STRINGS_IPv4NetworkPolicy
+{
+ /**
+ * IPv4 address.
+ */
+ struct in_addr network;
+
+ /**
+ * IPv4 netmask.
+ */
+ struct in_addr netmask;
+
+ /**
+ * Policy for port access.
+ */
+ struct GNUNET_STRINGS_PortPolicy pp;
+
+};
+
+
+/**
+ * @brief network in CIDR notation for IPV6.
+ */
+struct GNUNET_STRINGS_IPv6NetworkPolicy
+{
+ /**
+ * IPv6 address.
+ */
+ struct in6_addr network;
+
+ /**
+ * IPv6 netmask.
+ */
+ struct in6_addr netmask;
+
+ /**
+ * Policy for port access.
+ */
+ struct GNUNET_STRINGS_PortPolicy pp;
+
+};
+
+
+/**
+ * Parse an IPv4 network policy. The argument specifies a list of
+ * subnets. The format is (network[/netmask][:[!]SPORT-DPORT];)*
+ * (no whitespace, must be terminated with a semicolon). The network
+ * must be given in dotted-decimal notation. The netmask can be given
+ * in CIDR notation (/16) or in dotted-decimal (/255.255.0.0).
+ *
+ * @param routeListX a string specifying the IPv4 subnets
+ * @return the converted list, terminated with all zeros;
+ * NULL if the synatx is flawed
+ */
+struct GNUNET_STRINGS_IPv4NetworkPolicy *
+GNUNET_STRINGS_parse_ipv4_policy (const char *routeListX);
+
+
+/**
+ * Parse an IPv6 network policy. The argument specifies a list of
+ * subnets. The format is (network[/netmask[:[!]SPORT[-DPORT]]];)*
+ * (no whitespace, must be terminated with a semicolon). The network
+ * must be given in colon-hex notation. The netmask must be given in
+ * CIDR notation (/16) or can be omitted to specify a single host.
+ * Note that the netmask is mandatory if ports are specified.
+ *
+ * @param routeListX a string specifying the policy
+ * @return the converted list, 0-terminated, NULL if the synatx is flawed
+ */
+struct GNUNET_STRINGS_IPv6NetworkPolicy *
+GNUNET_STRINGS_parse_ipv6_policy (const char *routeListX);
+
+
+
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
@@ -133,7 +649,9 @@ char *GNUNET_STRINGS_relative_time_to_string (struct GNUNET_TIME_Relative
}
#endif
-
/* ifndef GNUNET_UTIL_STRING_H */
#endif
+
+/** @} */ /* end of group */
+
/* end of gnunet_util_string.h */