Ejemplo n.º 1
0
// Find the starting point of the regions R1, R2, & RV
//
func findRegions(word *snowballword.SnowballWord) (r1start, r2start, rvstart int) {

	// R1 & R2 are defined in the standard manner.
	r1start = romance.VnvSuffix(word, isLowerVowel, 0)
	r2start = romance.VnvSuffix(word, isLowerVowel, r1start)

	// Set RV, by default, as empty.
	rvstart = len(word.RS)

	// Handle the three special cases: "par", "col", & "tap"
	//
	prefix, prefixRunes := word.FirstPrefix("par", "col", "tap")
	if prefix != "" {
		rvstart = len(prefixRunes)
		return
	}

	// If the word begins with two vowels, RV is the region after the third letter
	if len(word.RS) >= 3 && isLowerVowel(word.RS[0]) && isLowerVowel(word.RS[1]) {
		rvstart = 3
		return
	}

	// Otherwise the region after the first vowel not at the beginning of the word.
	for i := 1; i < len(word.RS); i++ {
		if isLowerVowel(word.RS[i]) {
			rvstart = i + 1
			return
		}
	}

	return
}
Ejemplo n.º 2
0
// Find the starting point of the two regions R1 & R2.
//
// R1 is the region after the first non-vowel following a vowel,
// or is the null region at the end of the word if there is no
// such non-vowel.
//
// R2 is the region after the first non-vowel following a vowel
// in R1, or is the null region at the end of the word if there
// is no such non-vowel.
//
// See http://snowball.tartarus.org/texts/r1r2.html
//
func r1r2(word *snowballword.SnowballWord) (r1start, r2start int) {

	specialPrefix, _ := word.FirstPrefix("gener", "commun", "arsen")

	if specialPrefix != "" {
		r1start = len(specialPrefix)
	} else {
		r1start = romance.VnvSuffix(word, isLowerVowel, 0)
	}
	r2start = romance.VnvSuffix(word, isLowerVowel, r1start)
	return
}