code cleanup: move function declarations from speech.h to new file mnemonics.h

This adds a corresponding header file for mnemonics.c that was introduced in d5d93be.

src/libespeak-ng/compiledata.c

 
 #include "dictionary.h"               // for strncpy0
 #include "error.h"                    // for create_file_error_context
+#include "mnemonics.h"               // for LookupMnemName, MNEM_TAB
 #include "phoneme.h"                  // for PHONEME_TAB, PHONEME_TAB_LIST
 #include "readclause.h"               // for Read4Bytes
 #include "spect.h"                    // for SpectFrame, peak_t, SpectSeq
-#include "speech.h"  // for path_home, MNEM_TAB, GetFileLength
+#include "speech.h"			// for path_home, GetFileLength
 #include "synthdata.h"                // for LoadPhData
 #include "synthesize.h"               // for TUNE, frame_t, CONDITION_IS_OTHER
 #include "translate.h"                // for utf8_out, utf8_in

src/libespeak-ng/compiledict.c

 #include <espeak-ng/encoding.h>
 
 #include "compiledict.h"
-#include "dictionary.h"
-#include "readclause.h"
-
 #include "dictionary.h"           // for EncodePhonemes, strncpy0, HashDicti...
 #include "error.h"                // for create_file_error_context
+#include "mnemonics.h"               // for LookupMnemName, MNEM_TAB
 #include "phoneme.h"              // for PHONEME_TAB_LIST, phonSWITCH, phone...
 #include "readclause.h"           // for towlower2
-#include "speech.h"               // for LookupMnemName, MNEM_TAB, path_home
+#include "speech.h"		// for path_home
 #include "synthesize.h"           // for Write4Bytes
 #include "translate.h"            // for isspace2, IsDigit09, utf8_in, utf8_out
 

src/libespeak-ng/encoding.c

 
 #include <espeak-ng/encoding.h>   // for espeak_ng_TEXT_DECODER, ESPEAKNG_EN...
 #include "espeak-ng/speak_lib.h"  // for espeakCHARS_16BIT, espeakCHARS_8BIT
-#include "speech.h"               // for LookupMnem, MNEM_TAB
+#include "mnemonics.h"               // for LookupMnem, MNEM_TAB
 #include "translate.h"            // for LEADING_2_BITS, UTF8_TAIL_BITS
 
 // http://www.iana.org/assignments/character-sets/character-sets.xhtml

src/libespeak-ng/mnemonics.c

 
 #include <espeak-ng/espeak_ng.h>
 
-#include "speech.h"  // for MNEM_TAB, LookupMnem, LookupMnemName
+#include "mnemonics.h"  // for MNEM_TAB, LookupMnem, LookupMnemName
 
 int LookupMnem(MNEM_TAB *table, const char *string)
 {

src/libespeak-ng/mnemonics.h

+/*
+ * Copyright (C) 2005 to 2007 by Jonathan Duddington
+ * email: [email protected]
+ * Copyright (C) 2013-2015 Reece H. Dunn
+ * Copyright (C) 2021 Juho Hiltunen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see: <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef ESPEAK_NG_MNEMONICS_H
+#define ESPEAK_NG_MNEMONICS_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+typedef struct {
+	const char *mnem;
+	int value;
+} MNEM_TAB;
+int LookupMnem(MNEM_TAB *table, const char *string);
+const char *LookupMnemName(MNEM_TAB *table, const int value);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/libespeak-ng/speech.h

    #define PATH_ESPEAK_DATA  "/usr/share/espeak-ng-data"
 #endif
 
-typedef struct {
-	const char *mnem;
-	int value;
-} MNEM_TAB;
-int LookupMnem(MNEM_TAB *table, const char *string);
-const char *LookupMnemName(MNEM_TAB *table, const int value);
-
 void cancel_audio(void);
 
 extern char path_home[N_PATH_HOME];    // this is the espeak-ng-data directory

src/libespeak-ng/ssml.c

 
 #include "ssml.h"
 #include "dictionary.h"           // for strncpy0
+#include "mnemonics.h"               // for LookupMnemName, MNEM_TAB, 
 #include "readclause.h"           // for PARAM_STACK, param_stack, AddNameData
-#include "speech.h"               // for MNEM_TAB, LookupMnem
 #include "synthesize.h"           // for SPEED_FACTORS, speed
 #include "translate.h"            // for CTRL_EMBEDDED, IsDigit09, utf8_out
 #include "voice.h"                // for SelectVoice, SelectVoiceByName

src/libespeak-ng/voices.c

 
 #include "voice.h"                    // for voice_t, DoVoiceChange, N_PEAKS
 #include "dictionary.h"               // for strncpy0, LoadDictionary
+#include "mnemonics.h"               // for LookupMnemName, MNEM_TAB
 #include "phoneme.h"                  // for REPLACE_PHONEMES, n_replace_pho...
-#include "speech.h"                   // for LookupMnem, GetFileLength, PATHSEP
+#include "speech.h"                   // for GetFileLength, PATHSEP
 #include "mbrola.h"                   // for LoadMbrolaTable
 #include "synthdata.h"                // for SelectPhonemeTableName, LookupP...
 #include "synthesize.h"               // for SetSpeed, SPEED_FACTORS, speed