Revert "Move handling of SetLetterVowel() to language files"

This reverts commit 6042eb8d1e.

The change causes an issue with `pt-BR` and possibly other languages
and voices.

docs/voices.md

   - [stressAmp](#stressamp)
   - [intonation](#intonation)
   - [dictmin](#dictmin)
-  - [letterVowel](#letterVowel)
 
 ----------
 
 installed. If the size of the compiled dictionary data for the language
 (the file `espeak-ng-data/*_dict`) is less than this size then a
 warning is given.
-
-### letterVowel
-
-	letterVowel <letter>
-
-Used for some languages to handle a certain letter as a vowel instead of consonant.

espeak-ng-data/lang/art/jbo

 language jbo
 
 speed 80   // speed adjustment, percentage
-letterVowel y

espeak-ng-data/lang/cel/cy

 language cy
 
 intonation 4
-letterVowel w
-letterVowel y

espeak-ng-data/lang/gmq/da

 language da
 
 tunes s2 c2 q2 e2
-letterVowel y

espeak-ng-data/lang/gmq/is

 name Icelandic
 language is
-letterVowel y

espeak-ng-data/lang/gmq/nb

 dictionary no
 
 intonation 4
-letterVowel y

espeak-ng-data/lang/gmq/sv

 name Swedish
 language sv
-letterVowel y

espeak-ng-data/lang/gmw/af

 
 roughness 0
 pitch 63 120
-letterVowel y

espeak-ng-data/lang/gmw/de

 name German
 language de
-
-letterVowel y

espeak-ng-data/lang/gmw/nl

 name Dutch
 language nl
-letterVowel y

espeak-ng-data/lang/ine/sq

 name Albanian
 language sq
-letterVowel y
 
 // add this line to remove 'ë' at the end of words
 // replace 00  @/  NULL

espeak-ng-data/lang/roa/fr

 
 dictrules 1
 tunes s3 c3 q3 e3
-letterVowel y

espeak-ng-data/lang/roa/fr-BE

 
 dictrules 2
 tunes s3 c3 q3 e3
-letterVowel y
+
 

espeak-ng-data/lang/roa/fr-CH

 
 dictrules 3
 tunes s3 c3 q3 e3
-letterVowel y

espeak-ng-data/lang/roa/it

 status mature
 
 tunes s4 c4 q4 e4
-letterVowel y

espeak-ng-data/lang/roa/pt

 
 dictrules 1
 intonation 2
-letterVowel y

espeak-ng-data/lang/urj/fi

 name Finnish
 language fi
-letterVowel y

espeak-ng-data/lang/urj/hu

 language hu
 option bracket 0 0
 pitch 81 117
-letterVowel y
+
 

espeak-ng-data/lang/zls/bg

 
 stressAmp 13 12 17 17 20 22 22 21 
 stressLength 180 170  200 200  200 200  210 220
-letterVowel 0x2a
-

espeak-ng-data/lang/zls/bs

 
 stressAdd 10 10 0 0 0 0 -30 -30
 dictrules 3 4
-letterVowel y
-letterVowel r

espeak-ng-data/lang/zls/hr

 
 stressAdd 10 10 0 0 0 0 -30 -30
 dictrules 1
-letterVowel y
-letterVowel r

espeak-ng-data/lang/zls/sr

 
 stressAdd 10 10 0 0 0 0 -30 -30
 dictrules 2 4
-
-letterVowel y
-letterVowel r

espeak-ng-data/lang/zlw/cs

 name Czech
 language cs
-letterVowel y
-letterVowel r

espeak-ng-data/lang/zlw/pl

 language pl
 
 intonation 2
-letterVowel y

espeak-ng-data/lang/zlw/sk

 name Slovak
 language sk
-letterVowel y
-letterVowel r

src/libespeak-ng/tr_languages.c

 
 static void Translator_Russian(Translator *tr);
 
+static void SetLetterVowel(Translator *tr, int c)
+{
+	tr->letter_bits[c] = (tr->letter_bits[c] & 0x40) | 0x81; // keep value for group 6 (front vowels e,i,y)
+}
+
 static void ResetLetterBits(Translator *tr, int groups)
 {
 	// Clear all the specified groups
 		tr->langopts.vowel_pause = 0x30;
 		tr->langopts.param[LOPT_DIERESES] = 1;
 		tr->langopts.param[LOPT_PREFIXES] = 1;
+		SetLetterVowel(tr, 'y'); // add 'y' to vowels
 
 		tr->langopts.numbers = NUM_SWAP_TENS | NUM_HUNDRED_AND | NUM_SINGLE_AND | NUM_ROMAN | NUM_1900;
 		tr->langopts.accents = 1;
 	case L('b', 'g'): // Bulgarian
 	{
 		SetCyrillicLetters(tr);
+		SetLetterVowel(tr, 0x2a);
 		tr->encoding = ESPEAKNG_ENCODING_ISO_8859_5;
 		tr->langopts.param[LOPT_UNPRONOUNCABLE] = 0x432; // [v]  don't count this character at start of word
 		tr->langopts.param[LOPT_REGRESSIVE_VOICING] = 0x107; // devoice at end of word, and change voicing to match a following consonant (except v)
 
 		tr->langopts.numbers = NUM_OMIT_1_HUNDRED;
 
+		SetLetterVowel(tr, 'w'); // add letter to vowels and remove from consonants
+		SetLetterVowel(tr, 'y');
 	}
 		break;
 	case L('d', 'a'): // Danish
 
 		tr->langopts.stress_rule = STRESSPOSN_1L;
 		tr->langopts.param[LOPT_PREFIXES] = 1;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_SWAP_TENS | NUM_HUNDRED_AND | NUM_OMIT_1_HUNDRED | NUM_ORDINAL_DOT | NUM_1900 | NUM_ROMAN | NUM_ROMAN_CAPITALS | NUM_ROMAN_ORDINAL;
 	}
 		break;
 		tr->langopts.param[LOPT_LONG_VOWEL_THRESHOLD] = 175/2;
 
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_SWAP_TENS | NUM_ALLOW_SPACE | NUM_ORDINAL_DOT | NUM_ROMAN;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.param[LOPT_UNPRONOUNCABLE] = 2; // use de_rules for unpronouncable rules
 	}
 		break;
 		tr->langopts.long_stop = 130;
 
 		tr->langopts.numbers = NUM_DECIMAL_COMMA + NUM_ALLOW_SPACE;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.spelling_stress = 1;
 		tr->langopts.intonation_group = 3; // less intonation, don't raise pitch at comma
 	}
 		tr->langopts.accents = 2; // Say "Capital" after the letter.
 
 		tr->langopts.numbers = NUM_SINGLE_STRESS | NUM_DECIMAL_COMMA | NUM_ALLOW_SPACE | NUM_OMIT_1_HUNDRED | NUM_NOPAUSE | NUM_ROMAN | NUM_ROMAN_CAPITALS | NUM_ROMAN_AFTER | NUM_VIGESIMAL | NUM_DFRACTION_4;
+		SetLetterVowel(tr, 'y');
 	}
 		break;
     case L3('h','a', 'k'): // Hakka Chinese
 		tr->langopts.numbers2 = 0xa + NUM2_THOUSANDS_VAR5; // variant numbers before thousands,milliards
 		tr->langopts.our_alphabet = OFFSET_CYRILLIC; // don't say "cyrillic" before letter names
 
+		SetLetterVowel(tr, 'y');
+		SetLetterVowel(tr, 'r');
 	}
 		break;
 	case L('h', 't'): // Haitian Creole
 		tr->langopts.decimal_sep = ',';
 		tr->langopts.max_roman = 899;
 		tr->langopts.min_roman = 1;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.spelling_stress = 1;
 		SetLengthMods(tr, 3); // all equal
 	}
 		SetLetterBits(tr, 4, "kpst"); // Letter group F
 		SetLetterBits(tr, 3, "jvr"); // Letter group H
 		tr->letter_groups[1] = is_lettergroup_B;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_SINGLE_AND | NUM_HUNDRED_AND | NUM_AND_UNITS | NUM_1900;
 		tr->langopts.numbers2 = 0x2;
 	}
 		tr->langopts.numbers2 = NUM2_NO_TEEN_ORDINALS;
 		tr->langopts.roman_suffix = utf8_ordinal;
 		tr->langopts.accents = 2; // Say "Capital" after the letter.
+		SetLetterVowel(tr, 'y');
 	}
 		break;
 	case L3('j', 'b', 'o'): // Lojban
 		tr->langopts.vowel_pause = 0x20c; // pause before a word which starts with a vowel, or after a word which ends in a consonant
 		tr->punct_within_word = jbo_punct_within_word;
 		tr->langopts.param[LOPT_CAPS_IN_WORD] = 2; // capitals indicate stressed syllables
+		SetLetterVowel(tr, 'y');
 		tr->langopts.max_lengthmod = 368;
 	}
 		break;
 		tr->langopts.param[LOPT_DIERESES] = 1;
 		tr->langopts.param[LOPT_PREFIXES] = 1;
 		tr->langopts.param[LOPT_REGRESSIVE_VOICING] = 0x100; // devoice at end of word
+		SetLetterVowel(tr, 'y');
 
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_SWAP_TENS | NUM_OMIT_1_HUNDRED | NUM_OMIT_1_THOUSAND | NUM_ALLOW_SPACE | NUM_1900 | NUM_ORDINAL_DOT;
 		tr->langopts.ordinal_indicator = "e";
 
 		SetupTranslator(tr, stress_lengths_no, NULL);
 		tr->langopts.stress_rule = STRESSPOSN_1L;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_HUNDRED_AND | NUM_ALLOW_SPACE | NUM_1900 | NUM_ORDINAL_DOT;
 	}
 		break;
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_ALLOW_SPACE | NUM_DFRACTION_2;
 		tr->langopts.numbers2 = NUM2_THOUSANDS_VAR3;
 		tr->langopts.param[LOPT_COMBINE_WORDS] = 4 + 0x100; // combine 'nie' (marked with $alt2) with some 1-syllable (and 2-syllable) words (marked with $alt)
+		SetLetterVowel(tr, 'y');
 	}
 		break;
 	case L('p', 't'): // Portuguese
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_DFRACTION_2 | NUM_HUNDRED_AND | NUM_AND_UNITS | NUM_ROMAN_CAPITALS;
 		tr->langopts.numbers2 = NUM2_MULTIPLE_ORDINAL | NUM2_NO_TEEN_ORDINALS | NUM2_ORDINAL_NO_AND;
 		tr->langopts.max_roman = 5000;
+		SetLetterVowel(tr, 'y');
 		ResetLetterBits(tr, 0x2);
 		SetLetterBits(tr, 1, "bcdfgjkmnpqstvxz"); // B  hard consonants, excluding h,l,r,w,y
 		tr->langopts.param[LOPT_ALT] = 2; // call ApplySpecialAttributes2() if a word has $alt or $alt2
 		if (name2 == L('c', 's'))
 			tr->langopts.numbers2 = 0x108; // variant numbers before milliards
 
+		SetLetterVowel(tr, 'y');
+		SetLetterVowel(tr, 'r');
 		ResetLetterBits(tr, 0x20);
 		SetLetterBits(tr, 5, sk_voiced);
 	}
 
 		tr->langopts.stress_rule = STRESSPOSN_1R;
 		tr->langopts.stress_flags =  S_FINAL_DIM_ONLY | S_FINAL_NO_2 | S_FINAL_VOWEL_UNSTRESSED;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_HUNDRED_AND | NUM_AND_UNITS | NUM_DFRACTION_4;
 		tr->langopts.accents = 2; // "capital" after letter name
 	}
 		SetupTranslator(tr, stress_lengths_sv, stress_amps_sv);
 
 		tr->langopts.stress_rule = STRESSPOSN_1L;
+		SetLetterVowel(tr, 'y');
 		tr->langopts.numbers = NUM_SINGLE_STRESS | NUM_DECIMAL_COMMA | NUM_ALLOW_SPACE | NUM_1900;
 		tr->langopts.accents = 1;
 	}

src/libespeak-ng/voices.c

 
 	// these need a phoneme table to have been specified
 	V_REPLACE,
-	V_CONSONANTS,
-
-	// these are alpha features that need to be tested and categorized
-	V_LETTER_VOWEL
-
+	V_CONSONANTS
 };
 
 static MNEM_TAB options_tab[] = {
 	{ "l_length_mods",    0x100+LOPT_LENGTH_MODS },
 	{ "apostrophe",       0x100+LOPT_APOSTROPHE },
 
-	// these are alpha features that need to be tested and categorized
-	{ "letterVowel", V_LETTER_VOWEL },
 	{ NULL, 0 }
 };
 
 		case V_MAINTAINER:
 		case V_STATUS:
 			break;
-
-		case V_LETTER_VOWEL: {
-			char str[5] = "";
-			char c = '0';
-			char *endptr = NULL;
-			sscanf(p, "%s", str);
-			// assume a hex value if string starts with "0x"
-			if (str[0] == '0' && str[1] == 'x') {
-				c = strtoul(str, &endptr, 16);
-				if (errno == ERANGE)
-					fprintf(stderr, "letterVowel out of range.\n");
-			}
-			else  {// otherwise, assume a single letter
-				c = str[0];
-				if (c < 97 || c > 122) // valid values are a-z, ascii 97-122
-					fprintf(stderr, "letterVowel out of range.\n");
-			}
- 			new_translator->letter_bits[c] = (new_translator->letter_bits[c] & 0x40) | 0x81; // keep value for group 6 (front vowels e,i,y)
-			break;
-			}
-
 		default:
 			if ((key & 0xff00) == 0x100) {
 				if (langopts)