Collaboration diagram for String Manipulation:

Macros
#define	AV_ESCAPE_FLAG_WHITESPACE 0x01
	Consider spaces special and escape them even in the middle of the string. More...

#define	AV_ESCAPE_FLAG_STRICT 0x02
	Escape only specified special characters. More...

Enumerations
enum	AVEscapeMode { AV_ESCAPE_MODE_AUTO, AV_ESCAPE_MODE_BACKSLASH, AV_ESCAPE_MODE_QUOTE }

Functions
int	av_strstart (const char str, const char pfx, const char **ptr)
	Return non-zero if pfx is a prefix of str. More...

int	av_stristart (const char str, const char pfx, const char **ptr)
	Return non-zero if pfx is a prefix of str independent of case. More...

char *	av_stristr (const char haystack, const char needle)
	Locate the first case-independent occurrence in the string haystack of the string needle. More...

char *	av_strnstr (const char haystack, const char needle, size_t hay_length)
	Locate the first occurrence of the string needle in the string haystack where not more than hay_length characters are searched. More...

size_t	av_strlcpy (char dst, const char src, size_t size)
	Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst. More...

size_t	av_strlcat (char dst, const char src, size_t size)
	Append the string src to the string dst, but to a total length of no more than size - 1 bytes, and null-terminate dst. More...

size_t	av_strlcatf (char dst, size_t size, const char fmt,...) av_printf_format(3
	Append output to a string, according to a format. More...

size_t char *	av_asprintf (const char *fmt,...) av_printf_format(1
	Print arguments following specified format into a large enough auto allocated buffer. More...

size_t char char *	av_d2str (double d)
	Convert a number to a av_malloced string. More...

char *	av_get_token (const char *buf, const char term)
	Unescape the given string until a non escaped terminating char, and return the token corresponding to the unescaped string. More...

char *	av_strtok (char s, const char delim, char **saveptr)
	Split the string into several tokens which can be accessed by successive calls to av_strtok(). More...

int	av_isdigit (int c)
	Locale-independent conversion of ASCII isdigit. More...

int	av_isgraph (int c)
	Locale-independent conversion of ASCII isgraph. More...

int	av_isspace (int c)
	Locale-independent conversion of ASCII isspace. More...

static int	av_toupper (int c)
	Locale-independent conversion of ASCII characters to uppercase. More...

static int	av_tolower (int c)
	Locale-independent conversion of ASCII characters to lowercase. More...

int	av_isxdigit (int c)
	Locale-independent conversion of ASCII isxdigit. More...

int	av_strcasecmp (const char a, const char b)
	Locale-independent case-insensitive compare. More...

int	av_strncasecmp (const char a, const char b, size_t n)
	Locale-independent case-insensitive compare. More...

const char *	av_basename (const char *path)
	Thread safe basename. More...

const char *	av_dirname (char *path)
	Thread safe dirname. More...

int	av_escape (char *dst, const char src, const char *special_chars, enum AVEscapeMode mode, int flags)
	Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed with av_free(). More...

Detailed Description

Macro Definition Documentation

#define AV_ESCAPE_FLAG_STRICT 0x02

Escape only specified special characters.

Without this flag, escape also any characters that may be considered special by av_get_token(), such as the single quote.

Definition at line 277 of file avstring.h.

Referenced by av_bprint_escape(), and main().

#define AV_ESCAPE_FLAG_WHITESPACE 0x01

Consider spaces special and escape them even in the middle of the string.

This is equivalent to adding the whitespace characters to the special characters lists, except it is guaranteed to use the exact same list of whitespace characters as the rest of libavutil.

Definition at line 270 of file avstring.h.

Referenced by av_bprint_escape(), main(), and segment_list_print_entry().

Enumeration Type Documentation

enum AVEscapeMode

Enumerator
AV_ESCAPE_MODE_AUTO	Use auto-selected escaping mode.
AV_ESCAPE_MODE_BACKSLASH	Use backslash escaping.
AV_ESCAPE_MODE_QUOTE	Use single-quote escaping.

Definition at line 256 of file avstring.h.

Function Documentation

size_t char* av_asprintf	(	const char *	fmt,
			...
	)

Print arguments following specified format into a large enough auto allocated buffer.

It is similar to GNU asprintf().

Parameters

fmt	printf-compatible format string, specifying how the following parameters are used.

Returns: the allocated string

Note: You have to free the string yourself with av_free().

const char* av_basename ( const char * path )

Thread safe basename.

Parameters

path	the path, on DOS both \ and / are considered separators.

Returns: pointer to the basename substring.

Definition at line 233 of file avstring.c.

Referenced by append_entry(), and av_tolower().

size_t char char* av_d2str ( double d )

Convert a number to a av_malloced string.

Definition at line 138 of file avstring.c.

const char* av_dirname ( char * path )

Thread safe dirname.

Parameters

path	the path, on DOS both \ and / are considered separators.

Returns: the path with the separator replaced by the string terminator or ".".

Note: the function may change the input string.

Definition at line 250 of file avstring.c.

Referenced by av_tolower().

int av_escape	(	char **	dst,
		const char *	src,
		const char *	special_chars,
		enum AVEscapeMode	mode,
		int	flags
	)

Escape string in src, and put the escaped string in an allocated string in *dst, which must be freed with av_free().

Parameters

dst	pointer where an allocated string is put
src	string to escape, must be non-NULL
special_chars	string containing the special characters which need to be escaped, can be NULL
mode	escape mode to employ, see AV_ESCAPE_MODE_* macros. Any unknown value for mode will be considered equivalent to AV_ESCAPE_MODE_BACKSLASH, but this behaviour can change without notice.
flags	flags which control how to escape, see AV_ESCAPE_FLAG_ macros

Returns: the length of the allocated string, or a negative error code in case of error

See also: av_bprint_escape()

Definition at line 271 of file avstring.c.

Referenced by avfilter_init_str(), main(), and segment_list_print_entry().

char* av_get_token	(	const char **	buf,
		const char *	term
	)

Unescape the given string until a non escaped terminating char, and return the token corresponding to the unescaped string.

The normal \ and ' escaping is supported. Leading and trailing whitespaces are removed, unless they are escaped with '\' or are enclosed between ''.

Parameters

buf	the buffer to parse, buf will be updated to point to the terminating char
term	a 0-terminated list of terminating chars

Returns: the malloced unescaped string, which must be av_freed by the user, NULL in case of allocation failure

Definition at line 148 of file avstring.c.

Referenced by av_isxdigit(), av_opt_get_key_value(), concat_read_header(), dilate_init(), expand_function(), opt_map(), opt_show_entries(), parse_command(), parse_filter(), parse_interval(), parse_key_value_pair(), parse_link_name(), set_params(), and tee_write_header().

int av_isdigit ( int c )

Locale-independent conversion of ASCII isdigit.

Definition at line 288 of file avstring.c.

Referenced by av_get_frame_filename(), av_isxdigit(), av_parse_time(), channelmap_init(), date_get_num(), and init().

int av_isgraph ( int c )

Locale-independent conversion of ASCII isgraph.

Definition at line 293 of file avstring.c.

Referenced by init_pattern_from_file(), init_pattern_from_string(), and read_shape_from_file().

int av_isspace ( int c )

Locale-independent conversion of ASCII isspace.

Definition at line 298 of file avstring.c.

Referenced by av_expr_parse(), av_small_strptime(), avpriv_strtod(), choose_qop(), extract_rates(), ff_parse_key_value(), ff_smil_get_attr_ptr(), get_arg(), get_word(), http_parse_request(), parse_dynamic_acl(), parse_ffconfig(), parse_palette(), process_line(), read_chomp_line(), rt_event_to_ass(), rtmp_http_open(), and sami_paragraph_to_ass().

int av_isxdigit ( int c )

Locale-independent conversion of ASCII isxdigit.

Definition at line 304 of file avstring.c.

Referenced by av_tolower(), ff_urldecode(), and xbm_decode_frame().

int av_strcasecmp	(	const char *	a,
		const char *	b
	)

Locale-independent case-insensitive compare.

Note: This means only ASCII-range characters are case-insensitive

Definition at line 212 of file avstring.c.

Referenced by av_match_ext(), av_parse_color(), av_parse_time(), av_probe_input_buffer(), av_str2id(), av_tolower(), avi_metadata_creation_time(), color_table_compare(), decode_info_header(), ff_http_auth_handle_header(), ff_metadata_conv(), ff_rtp_handler_find_by_name(), ff_rtsp_open_transport_ctx(), get_cookies(), id3v1_create_tag(), id3v2_3_metadata_split_date(), img_read_header(), match_format(), mkv_write_tag(), nist_read_header(), opt_vsync(), parse_acl_row(), parse_dynamic_acl(), parse_ffconfig(), parse_fmtp(), process_line(), v4l2_set_parameters(), and write_header().

int av_stristart	(	const char *	str,
		const char *	pfx,
		const char **	ptr
	)

Return non-zero if pfx is a prefix of str independent of case.

If it is, *ptr is set to the address of the first character in str after the prefix.

Parameters

str	input string
pfx	prefix to test
ptr	updated if the prefix is matched inside str

Returns: non-zero if the prefix matches, zero otherwise

Definition at line 44 of file avstring.c.

Referenced by av_stristr(), ff_http_auth_handle_header(), ff_rtsp_open_transport_ctx(), has_header(), and rtsp_parse_range_npt().

char* av_stristr	(	const char *	haystack,
		const char *	needle
	)

Locate the first case-independent occurrence in the string haystack of the string needle.

A zero-length string needle is considered to match at the start of haystack.

This function is a case-insensitive version of the standard strstr().

Parameters

haystack	string to search in
needle	string to search for

Returns: pointer to the located match within haystack or a null pointer if no match

Definition at line 55 of file avstring.c.

Referenced by has_header(), http_start_receive_data(), and sami_paragraph_to_ass().

size_t av_strlcat	(	char *	dst,
		const char *	src,
		size_t	size
	)

Append the string src to the string dst, but to a total length of no more than size - 1 bytes, and null-terminate dst.

This function is similar to BSD strlcat(), but differs when size <= strlen(dst).

Parameters

dst	destination buffer
src	source string
size	size of destination buffer

Returns: the total length of src and dst

Warning: since the return value use the length of src and dst, these absolutely must be a properly 0-terminated strings, otherwise this will read beyond the end of the buffer and possibly crash.

Definition at line 92 of file avstring.c.

Referenced by av_dict_set(), av_printf_format(), avcodec_string(), ff_http_auth_create_response(), ff_make_absolute_url(), ff_rtsp_open_transport_ctx(), ff_rtsp_setup_input_streams(), ff_url_join(), get_sockaddr(), hls_write_header(), matroska_convert_tag(), mmsh_open_internal(), mov_open_dref(), opt_channel_layout(), query_formats(), rtmp_open(), rtp_new_connection(), rtsp_read_packet(), rtsp_send_reply(), and show_help_options().

size_t av_strlcatf	(	char *	dst,
		size_t	size,
		const char *	fmt,
			...
	)

Append output to a string, according to a format.

Never write out of the destination buffer, and always put a terminating 0 within the buffer.

Parameters

dst	destination buffer (string to which the output is appended)
size	total size of the destination buffer
fmt	printf-compatible format string, specifying how the following parameters are used

Returns: the length of the string that would have been generated if enough space had been available

size_t av_strlcpy	(	char *	dst,
		const char *	src,
		size_t	size
	)

Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.

This function is the same as BSD strlcpy().

Parameters

dst	destination buffer
src	source string
size	size of destination buffer

Returns: the length of src

Warning: since the return value is the length of src, src absolutely must be a properly 0-terminated string, otherwise this will read beyond the end of the buffer and possibly crash.

Definition at line 82 of file avstring.c.

Referenced by add_fragment(), amf_parse_object(), append_entry(), asf_read_language_list(), ass_encode_frame(), av_opencl_create_kernel(), av_parse_color(), av_strerror(), av_strlcat(), av_url_split(), avformat_alloc_output_context2(), avformat_open_input(), choose_qop(), compute_real_filename(), compute_status(), concat_open(), ctime1(), dprint_options(), dump_metadata(), ff_amf_get_field_value(), ff_amf_tag_contents(), ff_http_do_new_request(), ff_make_absolute_url(), ff_rtsp_open_transport_ctx(), ff_rtsp_setup_output_streams(), ffurl_alloc(), get_preset_file(), get_sockaddr(), handle_connect_error(), hls_open(), http_connect(), http_open(), http_parse_request(), id3v1_set_string(), id3v2_3_metadata_split_date(), img_read_header(), main(), matroska_convert_tag(), merge_date(), mmsh_open_internal(), mov_text_encode_frame(), mov_text_new_line_cb(), mov_text_text_cb(), mov_write_video_tag(), open_input(), opt_channel_layout(), opt_default(), opt_preset(), opt_streamid(), parse_command(), parse_command_line(), parse_playlist(), parse_sws_flags(), pp_get_mode_by_name_and_quality(), process_line(), query_formats(), rm_read_audio_stream_info(), rtmp_open(), rtp_new_connection(), rtsp_parse_request(), sap_read_header(), sap_write_header(), set_segment_filename(), show_help_options(), srt_encode_frame(), srt_text_cb(), srt_to_ass(), start_children(), stream_open(), udp_open(), write_header(), and write_packet().

int av_strncasecmp	(	const char *	a,
		const char *	b,
		size_t	n
	)

Locale-independent case-insensitive compare.

Note: This means only ASCII-range characters are case-insensitive

Definition at line 222 of file avstring.c.

Referenced by av_tolower(), avpriv_strtod(), data_open(), extract_rates(), ff_rtsp_open_transport_ctx(), ff_smil_get_attr_ptr(), get_cookies(), http_parse_request(), jacosub_read_header(), main(), match_format(), process_line(), read_apic(), realtext_probe(), realtext_read_header(), rt_event_to_ass(), sami_paragraph_to_ass(), and sami_read_header().

char* av_strnstr	(	const char *	haystack,
		const char *	needle,
		size_t	hay_length
	)

Locate the first occurrence of the string needle in the string haystack where not more than hay_length characters are searched.

A zero-length string needle is considered to match at the start of haystack.

This function is a length-limited version of the standard strstr().

Parameters

haystack	string to search in
needle	string to search for
hay_length	length of string to search in

Returns: pointer to the located match within haystack or a null pointer if no match

Definition at line 68 of file avstring.c.

int av_strstart	(	const char *	str,
		const char *	pfx,
		const char **	ptr
	)

Return non-zero if pfx is a prefix of str.

If it is, *ptr is set to the address of the first character in str after the prefix.

Parameters

str	input string
pfx	prefix to test
ptr	updated if the prefix is matched inside str

Returns: non-zero if the prefix matches, zero otherwise

Definition at line 33 of file avstring.c.

Referenced by amr_parse_sdp_line(), asfrtp_parse_sdp_line(), assert_file_overwrite(), bluray_open(), cache_open(), concat_open(), crypto_open2(), data_open(), ff_make_absolute_url(), ff_real_parse_sdp_a_line(), ff_rtsp_open_transport_ctx(), ff_wms_parse_sdp_a_line(), file_check(), get_sockaddr(), hls_open(), http_open_cnx(), ilbc_parse_sdp_line(), latm_parse_sdp_line(), md5_close(), open_output_file(), parse_command_line(), parse_h264_sdp_line(), parse_playlist(), parse_sdp_line(), rdt_parse_sdp_line(), rtsp_probe(), sap_probe(), tls_open(), and xiph_parse_sdp_line().

char* av_strtok	(	char *	s,
		const char *	delim,
		char **	saveptr
	)

Split the string into several tokens which can be accessed by successive calls to av_strtok().

A token is defined as a sequence of characters not belonging to the set specified in delim.

On the first call to av_strtok(), s should point to the string to parse, and the value of saveptr is ignored. In subsequent calls, s should be NULL, and saveptr should be unchanged since the previous call.

This function is similar to strtok_r() defined in POSIX.1.

Parameters

s	the string to parse, may be NULL
delim	0-terminated list of token delimiters, must be non-NULL
saveptr	user-provided pointer which points to stored information necessary for av_strtok() to continue scanning the same string. saveptr is updated to point to the next character after the first delimiter found, or to NULL if the string was terminated