forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Skipping dissectors dir for now. Change-Id: I717b66bfbc7cc81b83f8c2cbc011fcad643796aa Reviewed-on: https://code.wireshark.org/review/25694 Petri-Dish: Dario Lombardo <lomato@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Anders Broman <a.broman58@gmail.com>
322 lines
11 KiB
C
322 lines
11 KiB
C
/* strutil.h
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* String utility definitions
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __STRUTIL_H__
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#define __STRUTIL_H__
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#include "ws_symbol_export.h"
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#include <epan/wmem/wmem.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/** @file
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* String handling and conversion utilities.
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*/
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/** Given a pointer into a data buffer, and to the end of the buffer,
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* find the end of the (putative) line at that position in the data
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* buffer.
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*
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* @param data A pointer to the beginning of the data
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* @param dataend A pointer to the end of the data
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* @param eol A pointer that will receive the EOL location
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* @return A pointer to the EOL character(s) in "*eol".
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*/
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const guchar *find_line_end(const guchar *data, const guchar *dataend,
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const guchar **eol);
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/** Get the length of the next token in a line, and the beginning of the
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* next token after that (if any).
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* @param linep A pointer to the beginning of the line
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* @param lineend A pointer to the end of the line
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* @param next_token Receives the location of the next token
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* @return 0 if there is no next token.
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*/
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WS_DLL_PUBLIC
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int get_token_len(const guchar *linep, const guchar *lineend,
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const guchar **next_token);
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/** Given a string, generate a string from it that shows non-printable
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* characters as C-style escapes, and return a pointer to it.
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*
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* @param allocator The wmem scope
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* @param line A pointer to the input string
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* @param len The length of the input string
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* @return A pointer to the formatted string
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*
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* @see tvb_format_text()
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*/
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WS_DLL_PUBLIC
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gchar* format_text(wmem_allocator_t* allocator, const guchar *line, size_t len);
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/**
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* Given a string, generate a string from it that shows non-printable
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* characters as C-style escapes except a whitespace character
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* (space, tab, carriage return, new line, vertical tab, or formfeed)
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* which will be replaced by a space, and return a pointer to it.
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*
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* @param allocator The wmem scope
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* @param line A pointer to the input string
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* @param len The length of the input string
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* @return A pointer to the formatted string
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*
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*/
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WS_DLL_PUBLIC
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gchar* format_text_wsp(wmem_allocator_t* allocator, const guchar *line, size_t len);
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/**
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* Given a string, generate a string from it that shows non-printable
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* characters as the chr parameter passed, except a whitespace character
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* (space, tab, carriage return, new line, vertical tab, or formfeed)
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* which will be replaced by a space, and return a pointer to it.
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*
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* @param allocator The wmem scope
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* @param string A pointer to the input string
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* @param len The length of the input string
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* @param chr The character to use to replace non-printable characters
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* @return A pointer to the formatted string
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*
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*/
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WS_DLL_PUBLIC
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gchar* format_text_chr(wmem_allocator_t* allocator, const guchar *string, const size_t len, const guchar chr);
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/** Turn a string of hex digits with optional separators (defined by
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* is_byte_sep() into a byte array.
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*
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* @param hex_str The string of hex digits.
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @param force_separators If set to TRUE, separators MUST exist between
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* bytes.
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* @return True if the string was converted successfully
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*/
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WS_DLL_PUBLIC
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gboolean hex_str_to_bytes(const char *hex_str, GByteArray *bytes,
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gboolean force_separators);
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/* Turn a string of hex digits with optional separators (defined by encoding)
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* into a byte array. Unlike hex_str_to_bytes(), this will read as many hex-char
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* pairs as possible and not error if it hits a non-hex-char; instead it just ends
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* there. (i.e., like strtol()/atoi()/etc.) But it must see two hex chars at the
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* beginning or it will return FALSE.
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*
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* @param hex_str The string of hex digits.
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @param endptr if not NULL, is set to the char after the last hex character consumed.
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* @param encoding set to one or more bitwise-or'ed ENC_SEP_* (see proto.h)
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* @param fail_if_partial If set to TRUE, then the conversion fails if the whole
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* hex_str is not consumed.
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* @return FALSE only if no bytes were generated; or if fail_if_partial is TRUE
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* and the entire hex_str was not consumed.
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*
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* If no ENC_SEP_* is set, then no separators are allowed. If multiple ENC_SEP_* are
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* bit-or'ed, any of them can be a separator, but once the separator is seen then
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* only its same type is accepted for the rest of the string. (i.e., it won't convert
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* a "01:23-4567" even if ENC_SEP_COLON|ENC_SEP_DASH|ENC_SEP_NONE is passed in)
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*
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* This is done this way because it's likely a malformed scenario if they're mixed,
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* and this routine is used by dissectors via tvb_get_string_XXX routines.
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*/
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WS_DLL_PUBLIC
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gboolean hex_str_to_bytes_encoding(const char *hex_str, GByteArray *bytes, const char **endptr,
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const guint encoding, const gboolean fail_if_partial);
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/** Turn an RFC 3986 percent-encoded string into a byte array.
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*
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* @param uri_str The string of hex digits.
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @return True if the string was converted successfully
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* @see format_uri()
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*/
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WS_DLL_PUBLIC
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gboolean uri_str_to_bytes(const char *uri_str, GByteArray *bytes);
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/** Turn a byte array into an RFC 3986 percent-encoded string.
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*
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* @param allocator The wmem scope
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @param reserved_chars Normally the "gen-delims" and "sub-delims"
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* from RFC 3986 (":/?#[]@" and "!$&'()*+,;=" respectively)
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* plus space (hex value 20) are treated as reserved characters.
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* If this variable is non-NULL, its contents will be used
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* instead.
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* @note Any non-printing character determined by isprint(), along
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* with the % character itself are always reserved.
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* @see uri_str_to_bytes(), format_text(), isprint()
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*/
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WS_DLL_PUBLIC
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gchar* format_uri(wmem_allocator_t* allocator, const GByteArray *bytes, const gchar *reserved_chars);
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/** Turn a OID string representation (dot notation) into a byte array.
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*
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* @param oid_str The OID string (dot notaion).
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @param is_absolute True if this is an absolute OID; false for relative OID.
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* @return True if the string was converted successfully
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*/
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WS_DLL_PUBLIC
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gboolean rel_oid_str_to_bytes(const char *oid_str, GByteArray *bytes, gboolean is_absolute);
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/** Turn a OID string representation (dot notation) into a byte array.
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*
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* @param oid_str The OID string (dot notaion).
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* @param bytes The GByteArray that will receive the bytes. This
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* must be initialized by the caller.
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* @return True if the string was converted successfully
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*/
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WS_DLL_PUBLIC
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gboolean oid_str_to_bytes(const char *oid_str, GByteArray *bytes);
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/**
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* Create a copy of a GByteArray
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*
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* @param ba The byte array to be copied.
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* @return If ba exists, a freshly allocated copy. NULL otherwise.
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*
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* @todo - Should this be in strutil.c?
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*/
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WS_DLL_PUBLIC
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GByteArray *byte_array_dup(const GByteArray *ba);
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/**
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* Compare the contents of two GByteArrays
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*
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* @param ba1 A byte array
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* @param ba2 A byte array
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* @return If both arrays are non-NULL and their lengths are equal and
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* their contents are equal, returns TRUE. Otherwise, returns
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* FALSE.
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*
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* @todo - Should this be in strutil.c?
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*/
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WS_DLL_PUBLIC
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gboolean byte_array_equal(GByteArray *ba1, GByteArray *ba2);
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/** Return a XML escaped representation of the unescaped string.
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* The returned string must be freed when no longer in use.
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*
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* @param unescaped The unescaped string
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* @return An XML-escaped representation of the input string
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*/
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WS_DLL_PUBLIC
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gchar* xml_escape(const gchar *unescaped);
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/**
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* Return the first occurrence of needle in haystack.
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* Algorithm copied from GNU's glibc 2.3.2 memcmp()
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*
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* @param haystack The data to search
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* @param haystack_len The length of the search data
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* @param needle The string to look for
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* @param needle_len The length of the search string
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* @return A pointer to the first occurrence of "needle" in
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* "haystack". If "needle" isn't found or is NULL, or if
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* "needle_len" is 0, NULL is returned.
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*/
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WS_DLL_PUBLIC
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const guint8 * epan_memmem(const guint8 *haystack, guint haystack_len,
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const guint8 *needle, guint needle_len);
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/** Scan a string to make sure it's valid hex.
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*
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* @param string The string to validate
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* @param nbytes The length of the return buffer
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* @return A pointer to a buffer containing the converted raw bytes. This
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* buffer must be g_free()d by the caller.
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*/
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WS_DLL_PUBLIC
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guint8 * convert_string_to_hex(const char *string, size_t *nbytes);
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/** Prep a string for case-sensitive vs case-insensitive searching.
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*
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* @param string The search string
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* @param case_insensitive TRUE if case-insensitive, FALSE if not
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* @return A direct copy of the string if it's a case-sensitive search and
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* an uppercased version if not. In either case the string must be g_free()d
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* by the caller.
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*/
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WS_DLL_PUBLIC
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char * convert_string_case(const char *string, gboolean case_insensitive);
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/** Finds the first occurrence of string 'needle' in string 'haystack'.
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* The matching is done in a case insensitive manner.
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*
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* @param haystack The string possibly containing the substring
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* @param needle The substring to be searched
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* @return A pointer into 'haystack' where 'needle' is first found.
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* Otherwise it returns NULL.
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*/
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WS_DLL_PUBLIC
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const char * epan_strcasestr(const char *haystack, const char *needle);
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/** Guarantee a non-null string.
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*
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* @param string The string to check
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* @return A pointer 'string' if it's non-null, otherwise "[NULL]".
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*/
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WS_DLL_PUBLIC
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const char * string_or_null(const char *string);
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WS_DLL_PUBLIC
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int escape_string_len(const char *string);
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WS_DLL_PUBLIC
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char * escape_string(char *dst, const char *string);
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WS_DLL_PUBLIC
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void IA5_7BIT_decode(unsigned char * dest, const unsigned char* src, int len);
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/** Copy a string, escaping the 'chr' characters in it
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*
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* @param str The string to be copied
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* @param chr The character to be escaped
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* @return A copy of the string with every original 'chr' being
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* transformed into double 'chr'.
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*/
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WS_DLL_PUBLIC
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gchar* ws_strdup_escape_char (const gchar *str, const gchar chr);
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/** Copy a string, unescaping the 'chr' characters in it
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*
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* @param str The string to be copied
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* @param chr The character to be escaped
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* @return A copy of the string with every occurrence of double 'chr' in
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* the original string being copied as a single 'chr'.
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*/
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WS_DLL_PUBLIC
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gchar* ws_strdup_unescape_char (const gchar *str, const gchar chr);
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/** Replace values in a string
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*
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* @param str String containing 0 or more values to be replaced.
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* @param old_val Old value.
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* @param new_val New value. May be NULL, in which case occurences of
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* old_value will be removed.
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* @return A newly-allocated version of str with replacement values or
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* NULL on failure.
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*/
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WS_DLL_PUBLIC
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gchar *string_replace(const gchar* str, const gchar *old_val, const gchar *new_val);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __STRUTIL_H__ */
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