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/**
* @file pm_char.h
*
* Functions for working with characters and strings.
*/
#ifndef PRISM_CHAR_H
#define PRISM_CHAR_H
#include "prism/defines.h"
#include "prism/util/pm_newline_list.h"
#include <stdbool.h>
#include <stddef.h>
/**
* Returns the number of characters at the start of the string that are
* whitespace. Disallows searching past the given maximum number of characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @return The number of characters at the start of the string that are
* 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 while also tracking the location of each newline. Disallows
* searching past the given maximum number of characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @param newline_list The list of newlines to populate.
* @return 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 inline
* whitespace. Disallows searching past the given maximum number of characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @return The number of characters at the start of the string that are 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 decimal
* digits. Disallows searching past the given maximum number of characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @return The number of characters at the start of the string that are decimal
* digits.
*/
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
* hexadecimal digits. Disallows searching past the given maximum number of
* characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @return The number of characters at the start of the string that are
* hexadecimal 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 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.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @param invalid The pointer to set to the index of the first invalid
* underscore.
* @return The number of characters at the start of the string that are octal
* digits or underscores.
*/
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 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.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @param invalid The pointer to set to the index of the first invalid
* underscore.
* @return The number of characters at the start of the string that are decimal
* 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
* 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.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @param invalid The pointer to set to the index of the first invalid
* underscore.
* @return The number of characters at the start of the string that are
* hexadecimal 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 regexp
* options. Disallows searching past the given maximum number of characters.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @return The number of characters at the start of the string that are regexp
* options.
*/
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 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.
*
* @param string The string to search.
* @param length The maximum number of characters to search.
* @param invalid The pointer to set to the index of the first invalid
* underscore.
* @return The number of characters at the start of the string that are binary
* digits or underscores.
*/
size_t pm_strspn_binary_number(const uint8_t *string, ptrdiff_t length, const uint8_t **invalid);
/**
* Returns true if the given character is a whitespace character.
*
* @param b The character to check.
* @return True if the given character is a whitespace character.
*/
bool pm_char_is_whitespace(const uint8_t b);
/**
* Returns true if the given character is an inline whitespace character.
*
* @param b The character to check.
* @return True if the given character is an inline whitespace character.
*/
bool pm_char_is_inline_whitespace(const uint8_t b);
/**
* Returns true if the given character is a binary digit.
*
* @param b The character to check.
* @return True if the given character is a binary digit.
*/
bool pm_char_is_binary_digit(const uint8_t b);
/**
* Returns true if the given character is an octal digit.
*
* @param b The character to check.
* @return True if the given character is an octal digit.
*/
bool pm_char_is_octal_digit(const uint8_t b);
/**
* Returns true if the given character is a decimal digit.
*
* @param b The character to check.
* @return True if the given character is a decimal digit.
*/
bool pm_char_is_decimal_digit(const uint8_t b);
/**
* Returns true if the given character is a hexadecimal digit.
*
* @param b The character to check.
* @return True if the given character is a hexadecimal digit.
*/
bool pm_char_is_hexadecimal_digit(const uint8_t b);
#endif
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