Revert the gcc sign conversion warning fixes.

This reverts commits 0cc0300328 to
38d15f8f90.

The 0cc03003 commit breaks MBROLA voice support. As such, there
may be other breakages in those commits.

src/espeak-ng.c

 
 extern ESPEAK_NG_API void strncpy0(char *to, const char *from, int size);
 extern ESPEAK_NG_API int utf8_in(int *c, const char *buf);
-extern ESPEAK_NG_API size_t GetFileLength(const char *filename);
+extern ESPEAK_NG_API int GetFileLength(const char *filename);
 
 // This version of the command-line speak program uses the
 // libespeak.so.1  library
 
 int samplerate;
 int quiet = 0;
-int samples_total = 0;
-int samples_split = 0;
-int samples_split_seconds = 0;
+unsigned int samples_total = 0;
+unsigned int samples_split = 0;
+unsigned int samples_split_seconds = 0;
 unsigned int wavefile_count = 0;
 
 FILE *f_wavfile = NULL;
 
 static void CloseWavFile()
 {
-	int pos;
+	unsigned int pos;
 
 	if ((f_wavfile == NULL) || (f_wavfile == stdout))
 		return;
 
 	if (numsamples > 0) {
 		samples_total += numsamples;
-		fwrite(wav, (size_t)(numsamples*2), 1, f_wavfile);
+		fwrite(wav, numsamples*2, 1, f_wavfile);
 	}
 	return 0;
 }
 
 	int option_index = 0;
 	int c;
-	size_t ix;
+	int ix;
 	char *optarg2;
-	unsigned int value;
+	int value;
 	int flag_stdin = 0;
 	int flag_compile = 0;
-	size_t filesize = 0;
-	unsigned int synth_flags = espeakCHARS_AUTO | espeakPHONEMES | espeakENDPAUSE;
+	int filesize = 0;
+	int synth_flags = espeakCHARS_AUTO | espeakPHONEMES | espeakENDPAUSE;
 
 	int volume = -1;
 	int speed = -1;
 			strncpy0(wavefile, optarg2, sizeof(filename));
 			break;
 		case 'z': // remove pause from the end of a sentence
-			synth_flags &= (unsigned int)~espeakENDPAUSE;
+			synth_flags &= ~espeakENDPAUSE;
 			break;
 		case 0x100: // --stdin
 			flag_stdin = 1;
 	}
 
 	if (p_text != NULL) {
-		size_t size = strlen(p_text);
+		int size;
+		size = strlen(p_text);
 		espeak_Synth(p_text, size+1, 0, POS_CHARACTER, 0, synth_flags, NULL, NULL);
 	} else if (flag_stdin) {
-		size_t max = 1000;
+		int max = 1000;
 		p_text = (char *)malloc(max);
 
 		if (flag_stdin == 2) {

src/libespeak-ng/compilembrola.c

 {
 	// Pack 4 characters into a word
 	int ix;
+	unsigned char c;
 	unsigned int word;
 
 	if (string == NULL)
 	word = 0;
 	for (ix = 0; ix < 4; ix++) {
 		if (string[ix] == 0) break;
-		word |= ((unsigned int)string[ix] << (ix*8));
+		c = string[ix];
+		word |= (c << (ix*8));
 	}
 	return word;
 }

src/libespeak-ng/event.c

 	ts->tv_nsec = tv.tv_usec*1000;
 }
 
-void add_time_in_ms(struct timespec *ts, uint64_t time_in_ms)
+void add_time_in_ms(struct timespec *ts, int time_in_ms)
 {
 	if (!ts)
 		return;
 
-	uint64_t t_ns = (uint64_t)ts->tv_nsec + 1000000 * time_in_ms;
+	uint64_t t_ns = (uint64_t)ts->tv_nsec + 1000000 * (uint64_t)time_in_ms;
 	while (t_ns >= ONE_BILLION) {
 		ts->tv_sec += 1;
 		t_ns -= ONE_BILLION;

src/libespeak-ng/klatt.c

 		temp = (int)(out * wdata.amplitude * kt_globals.amp_gain0); // Convert back to integer
 
 		// mix with a recorded WAV if required for this phoneme
-		unsigned char c;
+		signed char c;
 		int sample;
 
 		if (wdata.mix_wavefile_ix < wdata.n_mix_wavefile) {

src/libespeak-ng/spect.c

 int LoadFrame(SpectFrame *frame, FILE *stream, int file_format_type)
 {
 	short ix;
-	unsigned short x;
+	short x;
 	unsigned short *spect_data;
 
 	frame->time = read_double(stream);
 
 espeak_ng_STATUS LoadSpectSeq(SpectSeq *spect, const char *filename)
 {
-	unsigned short n;
-	short temp;
+	short n, temp;
 	int ix;
 	uint32_t id1, id2, name_len;
 	int set_max_y = 0;
 	} else
 		spect->name = NULL;
 
-	fread(&n, sizeof(unsigned short), 1, stream);
+	fread(&n, sizeof(short), 1, stream);
 	fread(&spect->amplitude, sizeof(short), 1, stream);
 	fread(&spect->max_y, sizeof(short), 1, stream);
 	fread(&temp, sizeof(short), 1, stream); // unused

src/libespeak-ng/speech.c

 	return ENS_OK;
 }
 
-size_t GetFileLength(const char *filename)
+int GetFileLength(const char *filename)
 {
 	struct stat statbuf;
 

src/libespeak-ng/speech.h

 extern char path_home[N_PATH_HOME];    // this is the espeak-data directory
 
 extern ESPEAK_NG_API void strncpy0(char *to, const char *from, int size);
-extern ESPEAK_NG_API size_t GetFileLength(const char *filename);
+extern ESPEAK_NG_API int  GetFileLength(const char *filename);
 char *Alloc(int size);
 void Free(void *ptr);
 

src/libespeak-ng/synthesize.h

 } SOUND_ICON;
 
 typedef struct {
-	unsigned int name;
+	int name;
 	unsigned int next_phoneme;
-	unsigned int mbr_name;
-	unsigned int mbr_name2;
+	int mbr_name;
+	int mbr_name2;
 	int percent; // percentage length of first component
 	int control;
 } MBROLA_TAB;

src/libespeak-ng/wave.h

 
 // general functions
 extern void clock_gettime2(struct timespec *ts);
-extern void add_time_in_ms(struct timespec *ts, uint64_t time_in_ms);
+extern void add_time_in_ms(struct timespec *ts, int time_in_ms);
 
 // for tests
 extern void *wave_test_get_write_buffer();