PipeWire Utility Functions

Various utility functions. More...

Macros
#define	strndupa(s, n)
#define	strdupa(s)

Typedefs
typedef void(*	pw_destroy_t) (void *object)
	a function to destroy an item More...

Functions
const char *	pw_split_walk (const char *str, const char *delimiter, size_t *len, const char **state)
	Split a string based on delimiters. More...
char **	pw_split_strv (const char *str, const char *delimiter, int max_tokens, int *n_tokens)
	Split a string based on delimiters. More...
void	pw_free_strv (char **str)
	Free a NULL terminated array of strings. More...
char *	pw_strip (char *str, const char *whitespace)
	Strip all whitespace before and after a string. More...

Detailed Description

Various utility functions.

Macro Definition Documentation

strdupa

#define strdupa

(

s

)

Value:

        ({                                                                            \
                const char *__old = (s);                                              \
                size_t __len = strlen(__old) + 1;                                     \
                char *__new = (char *) alloca(__len);                                 \
                (char *) memcpy(__new, __old, __len);                                 \
        })

strndupa

#define strndupa	(		s,
			n
	)

Value:

        ({                                                                            \
                const char *__old = (s);                                              \
                size_t __len = strnlen(__old, (n));                                   \
                char *__new = (char *) __builtin_alloca(__len + 1);                   \
                memcpy(__new, __old, __len);                                          \
                __new[__len] = '\0';                                                  \
                __new;                                                                \
        })

Typedef Documentation

pw_destroy_t

typedef void(* pw_destroy_t) (void *object)

a function to destroy an item

Function Documentation

pw_free_strv()

void pw_free_strv

(

char **

str

)

Free a NULL terminated array of strings.

Parameters

str	a NULL terminated array of string

Free all the strings in the array and the array

pw_split_strv()

char** pw_split_strv	(	const char *	str,
		const char *	delimiter,
		int	max_tokens,
		int *	n_tokens
	)

Split a string based on delimiters.

Parameters

	str	a string to split
	delimiter	delimiter characters to split on
	max_tokens	the max number of tokens to split
[out]	n_tokens	the number of tokens

Returns

a NULL terminated array of strings that should be freed with pw_free_strv.

pw_split_walk()

const char* pw_split_walk	(	const char *	str,
		const char *	delimiter,
		size_t *	len,
		const char **	state
	)

Split a string based on delimiters.

Parameters

	str	a string to split
	delimiter	delimiter characters to split on
[out]	len	the length of the current string
[in,out]	state	a state variable

Returns

a string or NULL when the end is reached

Repeatedly call this function to split str into all substrings delimited by delimiter. state should be set to NULL on the first invocation and passed to the function until NULL is returned.

pw_strip()

char* pw_strip	(	char *	str,
		const char *	whitespace
	)

Strip all whitespace before and after a string.

Parameters

str	a string to strip
whitespace	characters to strip

Returns

the stripped part of str

Strip whitespace before and after str. str will be modified.