Nothing
# kate: default-dictionary en_US
## This file is part of the 'stringi' package for R.
## Copyright (c) 2013-2024, Marek Gagolewski <https://www.gagolewski.com/>
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
##
## 1. Redistributions of source code must retain the above copyright notice,
## this list of conditions and the following disclaimer.
##
## 2. Redistributions in binary form must reproduce the above copyright notice,
## this list of conditions and the following disclaimer in the documentation
## and/or other materials provided with the distribution.
##
## 3. Neither the name of the copyright holder nor the names of its
## contributors may be used to endorse or promote products derived from
## this software without specific prior written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
## BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
## FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
## PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
## OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
## WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
## OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
## EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#' @title Locate Text Boundaries
#'
#' @description
#' These functions locate text boundaries
#' (like character, word, line, or sentence boundaries).
#' Use \code{stri_locate_all_*} to locate all the matches.
#' \code{stri_locate_first_*} and \code{stri_locate_last_*}
#' give the first or the last matches, respectively.
#'
#'
#' @details
#' Vectorized over \code{str}.
#'
#' For more information on text boundary analysis
#' performed by \pkg{ICU}'s \code{BreakIterator}, see
#' \link{stringi-search-boundaries}.
#'
#' For \code{stri_locate_*_words},
#' just like in \code{\link{stri_extract_all_words}} and \code{\link{stri_count_words}},
#' \pkg{ICU}'s word \code{BreakIterator} iterator is used
#' to locate the word boundaries, and all non-word characters
#' (\code{UBRK_WORD_NONE} rule status) are ignored.
#' This function is equivalent to a call to
#' \code{stri_locate_*_boundaries(str, type='word', skip_word_none=TRUE, locale=locale)}
#'
#'
#'
#' @param str character vector or an object coercible to
#'
#' @param omit_no_match single logical value; if \code{TRUE},
#' a no-match will be indicated by a matrix with 0 rows
#' \code{stri_locate_all_*} only
#'
#' @param opts_brkiter named list with \pkg{ICU} BreakIterator's settings,
#' see \code{\link{stri_opts_brkiter}};
#' \code{NULL} for default break iterator, i.e., \code{line_break}
#'
#' @param ... additional settings for \code{opts_brkiter}
#'
#' @param locale \code{NULL} or \code{''} for text boundary analysis following
#' the conventions of the default locale, or a single string with
#' locale identifier, see \link{stringi-locale}
#'
#' @param get_length single logical value; if \code{FALSE} (default),
#' generate \emph{from-to} matrices; otherwise, output
#' \emph{from-length} ones
#'
#'
#' @return
#' \code{stri_locate_all_*} yields a list of \code{length(str)}
#' integer matrices.
#' \code{stri_locate_first_*} and \code{stri_locate_last_*} generate
#' return an integer matrix.
#' See \code{\link{stri_locate}} for more details.
#'
#'
#' @examples
#' test <- 'The\u00a0above-mentioned features are very useful. Spam, spam, eggs, bacon, and spam.'
#' stri_locate_all_words(test)
#' stri_locate_all_boundaries(
#' 'Mr. Jones and Mrs. Brown are very happy. So am I, Prof. Smith.',
#' type='sentence',
#' locale='en_US@ss=standard' # ICU >= 56 only
#' )
#'
#'
#'
#' @export
#' @family search_locate
#' @family indexing
#' @family locale_sensitive
#' @family text_boundaries
#' @rdname stri_locate_boundaries
stri_locate_all_boundaries <- function(
str, omit_no_match=FALSE, get_length=FALSE, ..., opts_brkiter=NULL
) {
if (!missing(...))
opts_brkiter <- do.call(stri_opts_brkiter, as.list(c(opts_brkiter, ...)))
.Call(C_stri_locate_all_boundaries, str, omit_no_match, opts_brkiter, get_length)
}
#' @export
#' @rdname stri_locate_boundaries
stri_locate_last_boundaries <- function(
str, get_length=FALSE, ..., opts_brkiter=NULL
) {
if (!missing(...))
opts_brkiter <- do.call(stri_opts_brkiter, as.list(c(opts_brkiter, ...)))
.Call(C_stri_locate_last_boundaries, str, opts_brkiter, get_length)
}
#' @export
#' @rdname stri_locate_boundaries
stri_locate_first_boundaries <- function(
str, get_length=FALSE, ..., opts_brkiter=NULL
) {
if (!missing(...))
opts_brkiter <- do.call(stri_opts_brkiter, as.list(c(opts_brkiter, ...)))
.Call(C_stri_locate_first_boundaries, str, opts_brkiter, get_length)
}
#' @export
#' @rdname stri_locate_boundaries
stri_locate_all_words <- function(
str, omit_no_match=FALSE, locale=NULL, get_length=FALSE
) {
stri_locate_all_boundaries(
str, omit_no_match=omit_no_match, get_length=get_length,
opts_brkiter=stri_opts_brkiter(
type="word", skip_word_none=TRUE, locale=locale
)
)
}
#' @export
#' @rdname stri_locate_boundaries
stri_locate_last_words <- function(
str, locale=NULL, get_length=FALSE
) {
stri_locate_last_boundaries(
str, get_length=get_length,
opts_brkiter=stri_opts_brkiter(
type="word", skip_word_none=TRUE, locale=locale
)
)
}
#' @export
#' @rdname stri_locate_boundaries
stri_locate_first_words <- function(
str, locale=NULL, get_length=FALSE
) {
stri_locate_first_boundaries(
str, get_length=get_length,
opts_brkiter=stri_opts_brkiter(
type="word", skip_word_none=TRUE, locale=locale
)
)
}
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.