Constify tables

So they are protected from overflows, and shared between processes

src/libespeak-ng/compiledata.c

@@ -598,7 +598,7 @@ static unsigned int StringToWord(const char *string)
 	return word;
 }
 
-static MNEM_TAB reserved_phonemes[] = {
+static const MNEM_TAB reserved_phonemes[] = {
 	{ "_\001",  phonCONTROL },      // NOT USED
 	{ "%",      phonSTRESS_U },
 	{ "%%",     phonSTRESS_D },
@@ -641,7 +641,7 @@ static void ReservePhCodes()
 	// Reserve phoneme codes which have fixed numbers so that they can be
 	// referred to from the program code.
 	unsigned int word;
-	MNEM_TAB *p;
+	const MNEM_TAB *p;
 
 	p = reserved_phonemes;
 	while (p->mnem != NULL) {
@@ -2671,7 +2671,7 @@ static const TUNE default_tune = {
 
 #define N_TUNE_NAMES  100
 
-MNEM_TAB envelope_names[] = {
+static const MNEM_TAB envelope_names[] = {
 	{ "fall", 0 },
 	{ "rise", 2 },
 	{ "fall-rise", 4 },

src/libespeak-ng/compiledict.c

@@ -64,7 +64,7 @@ static char *hash_chains[N_HASH_DICT];
 
 static char letterGroupsDefined[N_LETTER_GROUPS];
 
-MNEM_TAB mnem_rules[] = {
+static const MNEM_TAB mnem_rules[] = {
 	{ "unpr",     DOLLAR_UNPR },
 	{ "noprefix", DOLLAR_NOPREFIX },  // rule fails if a prefix has been removed
 	{ "list",     DOLLAR_LIST },    // a pronunciation is given in the *_list file
@@ -88,7 +88,7 @@ MNEM_TAB mnem_rules[] = {
 	{ NULL, -1 }
 };
 
-MNEM_TAB mnem_flags[] = {
+static const MNEM_TAB mnem_flags[] = {
 	// these in the first group put a value in bits0-3 of dictionary_flags
 	{ "$1",   0x41 }, // stress on 1st syllable
 	{ "$2",   0x42 }, // stress on 2nd syllable
@@ -779,7 +779,7 @@ static void copy_rule_string(char *string, int *state_out)
 	bool literal;
 	bool hexdigit_input = false;
 	int state = *state_out;
-	MNEM_TAB *mr;
+	const MNEM_TAB *mr;
 
 	if (string[0] == 0) return;
 

src/libespeak-ng/encoding.c

@@ -31,7 +31,7 @@
 #include "translate.h"            // for LEADING_2_BITS, UTF8_TAIL_BITS
 
 // http://www.iana.org/assignments/character-sets/character-sets.xhtml
-MNEM_TAB mnem_encoding[] = {
+static const MNEM_TAB mnem_encoding[] = {
 	{ "ANSI_X3.4-1968",   ESPEAKNG_ENCODING_US_ASCII },
 	{ "ANSI_X3.4-1986",   ESPEAKNG_ENCODING_US_ASCII },
 	{ "ASMO-708",         ESPEAKNG_ENCODING_ISO_8859_6 },

src/libespeak-ng/mnemonics.c

@@ -25,7 +25,7 @@
 
 #include "mnemonics.h"  // for MNEM_TAB, LookupMnem, LookupMnemName
 
-int LookupMnem(MNEM_TAB *table, const char *string)
+int LookupMnem(const MNEM_TAB *table, const char *string)
 {
 	while (table->mnem != NULL) {
 		if (string && strcmp(string, table->mnem) == 0)
@@ -35,7 +35,7 @@ int LookupMnem(MNEM_TAB *table, const char *string)
 	return table->value;
 }
 
-const char *LookupMnemName(MNEM_TAB *table, const int value)
+const char *LookupMnemName(const MNEM_TAB *table, const int value)
 {
 	while (table->mnem != NULL) {
 		if (table->value == value)

src/libespeak-ng/mnemonics.h

@@ -30,8 +30,8 @@ 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);
+int LookupMnem(const MNEM_TAB *table, const char *string);
+const char *LookupMnemName(const MNEM_TAB *table, const int value);
 
 #ifdef __cplusplus
 }

src/libespeak-ng/sintab.h

@@ -25,7 +25,7 @@ extern "C"
 {
 #endif
 
-short int sin_tab[2048] = {
+const short int sin_tab[2048] = {
 	0, -25, -50, -75, -100, -125, -150, -175,
 	-201, -226, -251, -276, -301, -326, -351, -376,
 	-401, -427, -452, -477, -502, -527, -552, -577,

src/libespeak-ng/ssml.c

@@ -48,7 +48,7 @@
 #include "translate.h"            // for CTRL_EMBEDDED, IsDigit09, utf8_out
 #include "voice.h"                // for SelectVoice, SelectVoiceByName
 
-static MNEM_TAB ssmltags[] = {
+static const MNEM_TAB ssmltags[] = {
 	{ "speak",     SSML_SPEAK },
 	{ "voice",     SSML_VOICE },
 	{ "prosody",   SSML_PROSODY },
@@ -460,7 +460,7 @@ static void PopParamStack(int tag_type, char *outbuf, int *outix, int *n_param_s
 static int ReplaceKeyName(char *outbuf, int index, int *outix)
 {
 	// Replace some key-names by single characters, so they can be pronounced in different languages
-	static MNEM_TAB keynames[] = {
+	static const MNEM_TAB keynames[] = {
 		{ "space ",        0xe020 },
 		{ "tab ",          0xe009 },
 		{ "underscore ",   0xe05f },
@@ -951,7 +951,7 @@ int ProcessSsmlTag(wchar_t *xml_buf, char *outbuf, int *outix, int n_outbuf, con
 	return 0;
 }
 
-static MNEM_TAB xml_entity_mnemonics[] = {
+static const MNEM_TAB xml_entity_mnemonics[] = {
 	{ "gt",   '>' },
 	{ "lt",   0xe000 + '<' },   // private usage area, to avoid confusion with XML tag
 	{ "amp",  '&' },

src/libespeak-ng/voices.c

@@ -49,7 +49,7 @@
 #include "translate.h"                // for LANGUAGE_OPTIONS, DeleteTranslator
 #include "wavegen.h"                  // for InitBreath
 
-MNEM_TAB genders[] = {
+static const MNEM_TAB genders[] = {
 	{ "male", ENGENDER_MALE },
 	{ "female", ENGENDER_FEMALE },
 	{ NULL, ENGENDER_MALE }
@@ -115,7 +115,7 @@ enum {
 	V_CONSONANTS
 };
 
-static MNEM_TAB keyword_tab[] = {
+static const MNEM_TAB keyword_tab[] = {
 	{ "name",         V_NAME },
 	{ "language",     V_LANGUAGE },
 	{ "gender",       V_GENDER },
@@ -480,7 +480,7 @@ static int Read8Numbers(char *data_in, int *data)
 	              &data[0], &data[1], &data[2], &data[3], &data[4], &data[5], &data[6], &data[7]);
 }
 
-static void ReadNumbers(char *p, int *flags, int maxValue,  MNEM_TAB *keyword_tab, int key) {
+static void ReadNumbers(char *p, int *flags, int maxValue,  const MNEM_TAB *keyword_tab, int key) {
 	// read a list of numbers from string p
 	// store them as flags in *flags
 	// the meaning of the  numbers is bit ordinals, not integer values
@@ -500,7 +500,7 @@ static void ReadNumbers(char *p, int *flags, int maxValue,  MNEM_TAB *keyword_ta
 	}
 }
 
-static int CheckTranslator(Translator *tr, MNEM_TAB *keyword_tab, int key)
+static int CheckTranslator(Translator *tr, const MNEM_TAB *keyword_tab, int key)
 {
 	// Return 0 if translator is set.
 	// Return 1 and print an error message for specified key if not