pm_char.h File Reference

Functions for working with characters and strings. More...

#include "prism/defines.h"
#include "prism/util/pm_newline_list.h"
#include <stdbool.h>
#include <stddef.h>

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Functions
size_t	pm_strspn_whitespace (const uint8_t *string, ptrdiff_t length)
	Returns the number of characters at the start of the string that are whitespace.
size_t	pm_strspn_whitespace_newlines (const uint8_t *string, ptrdiff_t length, pm_newline_list_t *newline_list)
	Returns the number of characters at the start of the string that are whitespace while also tracking the location of each newline.
size_t	pm_strspn_inline_whitespace (const uint8_t *string, ptrdiff_t length)
	Returns the number of characters at the start of the string that are inline whitespace.
size_t	pm_strspn_decimal_digit (const uint8_t *string, ptrdiff_t length)
	Returns the number of characters at the start of the string that are decimal digits.
size_t	pm_strspn_hexadecimal_digit (const uint8_t *string, ptrdiff_t length)
	Returns the number of characters at the start of the string that are hexadecimal digits.
size_t	pm_strspn_octal_number (const uint8_t *string, ptrdiff_t length, const uint8_t **invalid)
	Returns the number of characters at the start of the string that are octal digits or underscores.
size_t	pm_strspn_decimal_number (const uint8_t *string, ptrdiff_t length, const uint8_t **invalid)
	Returns the number of characters at the start of the string that are decimal digits or underscores.
size_t	pm_strspn_hexadecimal_number (const uint8_t *string, ptrdiff_t length, const uint8_t **invalid)
	Returns the number of characters at the start of the string that are hexadecimal digits or underscores.
size_t	pm_strspn_regexp_option (const uint8_t *string, ptrdiff_t length)
	Returns the number of characters at the start of the string that are regexp options.
size_t	pm_strspn_binary_number (const uint8_t *string, ptrdiff_t length, const uint8_t **invalid)
	Returns the number of characters at the start of the string that are binary digits or underscores.
bool	pm_char_is_whitespace (const uint8_t b)
	Returns true if the given character is a whitespace character.
bool	pm_char_is_inline_whitespace (const uint8_t b)
	Returns true if the given character is an inline whitespace character.
bool	pm_char_is_binary_digit (const uint8_t b)
	Returns true if the given character is a binary digit.
bool	pm_char_is_octal_digit (const uint8_t b)
	Returns true if the given character is an octal digit.
bool	pm_char_is_decimal_digit (const uint8_t b)
	Returns true if the given character is a decimal digit.
bool	pm_char_is_hexadecimal_digit (const uint8_t b)
	Returns true if the given character is a hexadecimal digit.

Detailed Description

Functions for working with characters and strings.

Function Documentation

pm_strspn_whitespace()

size_t pm_strspn_whitespace	(	const uint8_t *	string,
		ptrdiff_t	length
	)

Returns the number of characters at the start of the string that are whitespace.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.

Returns

The number of characters at the start of the string that are whitespace.

Disallows searching past the given maximum number of characters.

pm_strspn_whitespace_newlines()

size_t pm_strspn_whitespace_newlines	(	const uint8_t *	string,
		ptrdiff_t	length,
		pm_newline_list_t *	newline_list
	)

Returns the number of characters at the start of the string that are whitespace while also tracking the location of each newline.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.
newline_list	The list of newlines to populate.

Returns

The number of characters at the start of the string that are whitespace.

Disallows searching past the given maximum number of characters.

pm_strspn_inline_whitespace()

size_t pm_strspn_inline_whitespace	(	const uint8_t *	string,
		ptrdiff_t	length
	)

Returns the number of characters at the start of the string that are inline whitespace.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.

Returns

The number of characters at the start of the string that are inline whitespace.

Disallows searching past the given maximum number of characters.

pm_strspn_decimal_digit()

size_t pm_strspn_decimal_digit	(	const uint8_t *	string,
		ptrdiff_t	length
	)

Returns the number of characters at the start of the string that are decimal digits.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.

Returns

The number of characters at the start of the string that are decimal digits.

Disallows searching past the given maximum number of characters.

pm_strspn_hexadecimal_digit()

size_t pm_strspn_hexadecimal_digit	(	const uint8_t *	string,
		ptrdiff_t	length
	)

Returns the number of characters at the start of the string that are hexadecimal digits.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.

Returns

The number of characters at the start of the string that are hexadecimal digits.

Disallows searching past the given maximum number of characters.

pm_strspn_octal_number()

size_t pm_strspn_octal_number	(	const uint8_t *	string,
		ptrdiff_t	length,
		const uint8_t **	invalid
	)

Returns the number of characters at the start of the string that are octal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

Parameters

string	The string to search.
length	The maximum number of characters to search.
invalid	The pointer to set to the index of the first invalid underscore.

Returns

The number of characters at the start of the string that are octal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

pm_strspn_decimal_number()

size_t pm_strspn_decimal_number	(	const uint8_t *	string,
		ptrdiff_t	length,
		const uint8_t **	invalid
	)

Returns the number of characters at the start of the string that are decimal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

Parameters

string	The string to search.
length	The maximum number of characters to search.
invalid	The pointer to set to the index of the first invalid underscore.

Returns

The number of characters at the start of the string that are decimal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore

pm_strspn_hexadecimal_number()

size_t pm_strspn_hexadecimal_number	(	const uint8_t *	string,
		ptrdiff_t	length,
		const uint8_t **	invalid
	)

Returns the number of characters at the start of the string that are hexadecimal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

Parameters

string	The string to search.
length	The maximum number of characters to search.
invalid	The pointer to set to the index of the first invalid underscore.

Returns

The number of characters at the start of the string that are hexadecimal digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

pm_strspn_regexp_option()

size_t pm_strspn_regexp_option	(	const uint8_t *	string,
		ptrdiff_t	length
	)

Returns the number of characters at the start of the string that are regexp options.

Disallows searching past the given maximum number of characters.

Parameters

string	The string to search.
length	The maximum number of characters to search.

Returns

The number of characters at the start of the string that are regexp options.

Disallows searching past the given maximum number of characters.

pm_strspn_binary_number()

size_t pm_strspn_binary_number	(	const uint8_t *	string,
		ptrdiff_t	length,
		const uint8_t **	invalid
	)

Returns the number of characters at the start of the string that are binary digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

Parameters

string	The string to search.
length	The maximum number of characters to search.
invalid	The pointer to set to the index of the first invalid underscore.

Returns

The number of characters at the start of the string that are binary digits or underscores.

Disallows searching past the given maximum number of characters.

If multiple underscores are found in a row or if an underscore is found at the end of the number, then the invalid pointer is set to the index of the first invalid underscore.

pm_char_is_whitespace()

bool pm_char_is_whitespace

(

const uint8_t

b

)

Returns true if the given character is a whitespace character.

Parameters

b	The character to check.

Returns

True if the given character is a whitespace character.

pm_char_is_inline_whitespace()

bool pm_char_is_inline_whitespace

(

const uint8_t

b

)

Returns true if the given character is an inline whitespace character.

Parameters

b	The character to check.

Returns

True if the given character is an inline whitespace character.

pm_char_is_binary_digit()

bool pm_char_is_binary_digit

(

const uint8_t

b

)

Returns true if the given character is a binary digit.

Parameters

b	The character to check.

Returns

True if the given character is a binary digit.

pm_char_is_octal_digit()

bool pm_char_is_octal_digit

(

const uint8_t

b

)

Returns true if the given character is an octal digit.

Parameters

b	The character to check.

Returns

True if the given character is an octal digit.

pm_char_is_decimal_digit()

bool pm_char_is_decimal_digit

(

const uint8_t

b

)

Returns true if the given character is a decimal digit.

Parameters

b	The character to check.

Returns

True if the given character is a decimal digit.

pm_char_is_hexadecimal_digit()

bool pm_char_is_hexadecimal_digit

(

const uint8_t

b

)

Returns true if the given character is a hexadecimal digit.

Parameters

b	The character to check.

Returns

True if the given character is a hexadecimal digit.