NAME

src/charset/ascii.c

DESCRIPTION

This file implements the charset functions for ascii data and common charset functionality for similar charsets like iso-8859-1.

STRING *ascii_get_graphemes

Retrieves the graphemes for the STRING source_string, starting at offset and ending at offset + count.

static void set_graphemes

Sets the graphemes for source_string, starting at offset. Replace replace_count graphemes with those from STRING insert_string.

STRING *ascii_get_graphemes_inplace

Retrieves the graphemes in place for ascii STRING source_string, starting at offset. Retrieves count graphemes and puts them into dest_string.

static STRING *to_ascii

Attempts to convert STRING src to ASCII in STRING dest. Throws an exception if unconvertable UNICODE characters are involved.

static STRING *to_unicode

Converts the ASCII STRING src to UNICODE STRING dest.

static STRING *to_charset

Converts STRING src to ASCII charset STRING dest.

static STRING *compose

Can't compose ASCII strings, so performs a string copy on it and returns the new string.

static STRING *decompose

Can't decompose ASCII, so we perform a string copy instead and return a pointer to the new string.

static void upcase

Converts the STRING source_string to all uppercase.

static void downcase

Converts the STRING source_string to all lower-case.

static void titlecase

Converts the STRING given by source_string to title case, where the first character is upper case and all the rest of the characters are lower-case.

static void upcase_first

Sets the first character in the STRING source_string to upper case, but doesn't modify the rest of the string.

static void downcase_first

Sets the first character of the STRING source_string to lowercase, but doesn't modify the rest of the characters.

static void titlecase_first

Converts the first letter of STRING source_string to upper case, but doesn't modify the rest of the string.

INTVAL ascii_compare

Compares two strings as ASCII strings. If STRING lhs > rhs, returns 1. If lhs == rhs returns 0. If STRING lhs < rhs, returns -1.

INTVAL mixed_cs_index

Searches for the first instance of STRING search in STRING src. returns the position where the substring is found if it is indeed found. Returns -1 otherwise. Operates on different types of strings, not just ASCII.

INTVAL ascii_cs_index

Searches for the first instance of STRING search in STRING src. returns the position where the substring is found if it is indeed found. Returns -1 otherwise.

INTVAL ascii_cs_rindex

Searches for the last instance of STRING search_string in STRING source_string. Starts searching at offset.

static UINTVAL validate

Verifies that the given string is valid ASCII. Returns 1 if it is ASCII, returns 0 otherwise.

static STRING *string_from_codepoint

Creates a new STRING object from a single codepoint codepoint. Returns the new STRING.

static INTVAL is_cclass

RT#48260: Not yet documented!!!

static INTVAL find_cclass

RT#48260: Not yet documented!!!

static INTVAL find_not_cclass

RT#48260: Not yet documented!!!

size_t ascii_compute_hash

Computes the hash of STRING source_string starting with seed value seed.

const CHARSET *Parrot_charset_ascii_init

Initialize the ASCII charset but registering all the necessary function pointers and settings.

STRING *charset_cvt_ascii_to_binary

Converts an ASCII STRING src to a binary STRING dest.

STRING *charset_cvt_ascii_to_iso_8859_1

Converts ASCII STRING src to ISO8859-1 STRING dest.