String handling

Collaboration diagram for String handling:

Data Structures
struct	str_crop_info

Functions
bool	str_match_end (const char *str, const char *end)
	Match the end of a string.
unsigned int	str_fnv_hash (const char *str)
	Fowler/Noll/Vo – FNV-1a simple string hash.
char *	str_concat (char *dst,...) DPKG_ATTR_SENTINEL
char *	str_fmt (const char *fmt,...) DPKG_ATTR_PRINTF(1)
	Print formatted output to an allocated string.
char *	str_escape_fmt (char *dest, const char *src, size_t n)
	Escape format characters from a string.
char *	str_quote_meta (const char *src)
	Quote shell metacharacters in a string.
char *	str_strip_quotes (char *str)
	Check and strip possible surrounding quotes in string.
char *	str_rtrim_spaces (const char *str, char *str_end)
	Trim possible ending spaces in string.
int	str_width (const char *str)
	Compute the screen width of a string.
void	str_gen_crop (const char *str, int max_width, struct str_crop_info *crop)
	Generate the crop values for a string given a maximum screen width.

Detailed Description

Function Documentation

str_concat()

char * str_concat	(	char *	dst,
			...
	)

References args.

Referenced by pkgbin_name_archqual().

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str_escape_fmt()

char * str_escape_fmt	(	char *	dst,
		const char *	src,
		size_t	n
	)

Escape format characters from a string.

Parameters

dst	The destination string.
src	The source string.
n	The size of the destination buffer.

Returns

The end of the destination string.

str_fmt()

char * str_fmt	(	const char *	fmt,
			...
	)

Print formatted output to an allocated string.

Parameters

fmt	The format string.
...	The format arguments.

Returns

The new allocated formatted output string (never NULL).

References args, and m_vasprintf().

Referenced by atomic_file_new(), do_auto(), do_build(), do_raw_extract(), do_showinfo(), dpkg_db_get_path(), dpkg_fsys_get_path(), dpkg_options_load(), execbackend(), and path_make_temp_template().

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str_fnv_hash()

unsigned int str_fnv_hash

(

const char *

str

)

Fowler/Noll/Vo – FNV-1a simple string hash.

For more info,

See also

http://www.isthe.com/chongo/tech/comp/fnv/index.html.

Parameters

str	The string to hash.

Returns

The hashed value.

References FNV_MIXING_PRIME, and FNV_OFFSET_BASIS.

Referenced by fsys_hash_find_node(), and pkg_hash_find_set().

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str_gen_crop()

void str_gen_crop	(	const char *	str,
		int	max_width,
		struct str_crop_info *	crop
	)

Generate the crop values for a string given a maximum screen width.

This function analyzes the string passed and computes the correct point where to crop the string, returning the amount of string and maximum bytes to use for padding for example.

On NLS enabled builds, in addition the string will be cropped on any newline.

Parameters

	str	The string to crop.
	max_width	The max screen width to use.
[out]	crop	The generated crop values for the string.

References _, str_crop_info::max_bytes, ohshit(), and str_crop_info::str_bytes.

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str_match_end()

bool str_match_end	(	const char *	str,
		const char *	end
	)

Match the end of a string.

Parameters

str	The string.
end	The end to match in str.

Returns

Whether the string was matched at the end.

Referenced by do_split().

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str_quote_meta()

char * str_quote_meta

(

const char *

src

)

Quote shell metacharacters in a string.

This function allows passing strings to commands without splitting the arguments, like in system(3)

Parameters

src	The source string to escape.

Returns

The new allocated string (never NULL).

References m_malloc().

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str_rtrim_spaces()

char * str_rtrim_spaces	(	const char *	str,
		char *	str_end
	)

Trim possible ending spaces in string.

Parameters

str	The string to act on.
str_end	The end of the string to act on.

Returns

A pointer to the end of the trimmed string.

str_strip_quotes()

char * str_strip_quotes

(

char *

str

)

Check and strip possible surrounding quotes in string.

Parameters

str	The string to act on.

Returns

A pointer to str or NULL if the quotes were unbalanced.

str_width()

int str_width

(

const char *

str

)

Compute the screen width of a string.

Parameters

str	The multibyte string.

Returns

The width of the string.

References _, m_malloc(), and ohshit().

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