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Date: Sat, 4 Mar 2017 08:50:59 +0000
From: Okash Khawaja <okash.khawaja@...il.com>
To: "Speakup is a screen review system for Linux."
<speakup@...ux-speakup.org>
Cc: Samuel Thibault <samuel.thibault@...-lyon.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 2/3] speakup: convert screen reading to 16bit characters
On Thu, Mar 02, 2017 at 02:53:55AM +0100, Samuel Thibault wrote:
> This adds 16bit character support to most of the screen reading by
> extending characters to u16 throughout the code.
>
> Non-latin1 characters are assumed to be alphabetic type for now.
>
> non-latin1 vt_notifier_call-provided characters are not ignored any
> more, and the 16bit character returned by get_char is not truncated any
> more. For simplicity, speak_char still only supports latin1 characters.
> Its direct mode however does support 16bit characters, so in practice
> this will not be a limitation, non-latin1 languages will be handled by
> the synthesizer. spelling words does not support direct mode yet, for
> simplicity for now it will ignore 16bit characters.
>
> For simplicity again, speakup messages are left in latin1 for now.
>
> Some coding style is fixed along the way.
>
> Signed-off-by: Samuel Thibault <samuel.thibault@...-lyon.org>
>
> Index: linux-4.10/drivers/staging/speakup/main.c
> ===================================================================
> --- linux-4.10.orig/drivers/staging/speakup/main.c
> +++ linux-4.10/drivers/staging/speakup/main.c
> @@ -67,7 +67,7 @@ MODULE_PARM_DESC(quiet, "Do not announce
> special_func spk_special_handler;
>
> short spk_pitch_shift, synth_flags;
> -static char buf[256];
> +static u16 buf[256];
> int spk_attrib_bleep, spk_bleeps, spk_bleep_time = 10;
> int spk_no_intr, spk_spell_delay;
> int spk_key_echo, spk_say_word_ctl;
> @@ -112,7 +112,7 @@ enum {
>
> static struct tty_struct *tty;
>
> -static void spkup_write(const char *in_buf, int count);
> +static void spkup_write(const u16 *in_buf, int count);
>
> static char *phonetic[] = {
> "alfa", "bravo", "charlie", "delta", "echo", "foxtrot", "golf", "hotel",
> @@ -238,7 +238,8 @@ static u_short default_chartab[256] = {
> struct task_struct *speakup_task;
> struct bleep spk_unprocessed_sound;
> static int spk_keydown;
> -static u_char spk_lastkey, spk_close_press, keymap_flags;
> +static u16 spk_lastkey;
> +static u_char spk_close_press, keymap_flags;
> static u_char last_keycode, this_speakup_key;
> static u_long last_spk_jiffy;
>
> @@ -426,9 +427,9 @@ static void announce_edge(struct vc_data
> spk_msg_get(MSG_EDGE_MSGS_START + msg_id - 1));
> }
>
> -static void speak_char(u_char ch)
> +static void speak_char(u16 ch)
> {
> - char *cp = spk_characters[ch];
> + char *cp;
> struct var_t *direct = spk_get_var(DIRECT);
>
> if (direct && direct->u.n.value) {
> @@ -436,11 +437,15 @@ static void speak_char(u_char ch)
> spk_pitch_shift++;
> synth_printf("%s", spk_str_caps_start);
> }
> - synth_printf("%c", ch);
> + synth_putwc_s(ch);
> if (IS_CHAR(ch, B_CAP))
> synth_printf("%s", spk_str_caps_stop);
> return;
> }
> +
> + if (ch >= 0x100)
> + return;
> + cp = spk_characters[ch];
> if (cp == NULL) {
> pr_info("speak_char: cp == NULL!\n");
> return;
> @@ -486,7 +491,7 @@ static u16 get_char(struct vc_data *vc,
>
> static void say_char(struct vc_data *vc)
> {
> - u_short ch;
> + u16 ch;
>
> spk_old_attr = spk_attr;
> ch = get_char(vc, (u_short *)spk_pos, &spk_attr);
> @@ -496,20 +501,20 @@ static void say_char(struct vc_data *vc)
> if (spk_attrib_bleep & 2)
> say_attributes(vc);
> }
> - speak_char(ch & 0xff);
> + speak_char(ch);
> }
>
> static void say_phonetic_char(struct vc_data *vc)
> {
> - u_short ch;
> + u16 ch;
>
> spk_old_attr = spk_attr;
> ch = get_char(vc, (u_short *)spk_pos, &spk_attr);
> - if (isascii(ch) && isalpha(ch)) {
> + if (ch <= 0x7f && isalpha(ch)) {
> ch &= 0x1f;
> synth_printf("%s\n", phonetic[--ch]);
> } else {
> - if (IS_CHAR(ch, B_NUM))
> + if (ch < 0x100 && IS_CHAR(ch, B_NUM))
> synth_printf("%s ", spk_msg_get(MSG_NUMBER));
> speak_char(ch);
> }
> @@ -551,42 +556,42 @@ static void say_next_char(struct vc_data
> static u_long get_word(struct vc_data *vc)
> {
> u_long cnt = 0, tmpx = spk_x, tmp_pos = spk_pos;
> - char ch;
> - u_short attr_ch;
> + u16 ch;
> + u16 attr_ch;
> u_char temp;
>
> spk_old_attr = spk_attr;
> - ch = (char)get_char(vc, (u_short *)tmp_pos, &temp);
> + ch = get_char(vc, (u_short *)tmp_pos, &temp);
>
> /* decided to take out the sayword if on a space (mis-information */
> if (spk_say_word_ctl && ch == SPACE) {
> *buf = '\0';
> synth_printf("%s\n", spk_msg_get(MSG_SPACE));
> return 0;
> - } else if ((tmpx < vc->vc_cols - 2)
> - && (ch == SPACE || ch == 0 || IS_WDLM(ch))
> - && ((char)get_char(vc, (u_short *)&tmp_pos + 1, &temp) >
> - SPACE)) {
> + } else if (tmpx < vc->vc_cols - 2 &&
> + (ch == SPACE || ch == 0 || (ch < 0x100 && IS_WDLM(ch))) &&
> + get_char(vc, (u_short *)&tmp_pos + 1, &temp) > SPACE) {
> tmp_pos += 2;
> tmpx++;
> } else
> while (tmpx > 0) {
> - ch = (char)get_char(vc, (u_short *)tmp_pos - 1, &temp);
> - if ((ch == SPACE || ch == 0 || IS_WDLM(ch))
> - && ((char)get_char(vc, (u_short *)tmp_pos, &temp) >
> - SPACE))
> + ch = get_char(vc, (u_short *)tmp_pos - 1, &temp);
> + if ((ch == SPACE || ch == 0 ||
> + (ch < 0x100 && IS_WDLM(ch))) &&
> + get_char(vc, (u_short *)tmp_pos, &temp) > SPACE)
> break;
> tmp_pos -= 2;
> tmpx--;
> }
> attr_ch = get_char(vc, (u_short *)tmp_pos, &spk_attr);
> - buf[cnt++] = attr_ch & 0xff;
> + buf[cnt++] = attr_ch;
> while (tmpx < vc->vc_cols - 1) {
> tmp_pos += 2;
> tmpx++;
> - ch = (char)get_char(vc, (u_short *)tmp_pos, &temp);
> - if ((ch == SPACE) || ch == 0
> - || (IS_WDLM(buf[cnt - 1]) && (ch > SPACE)))
> + ch = get_char(vc, (u_short *)tmp_pos, &temp);
> + if (ch == SPACE || ch == 0 ||
> + (buf[cnt - 1] < 0x100 && IS_WDLM(buf[cnt - 1]) &&
> + ch > SPACE))
> break;
> buf[cnt++] = ch;
> }
> @@ -610,7 +615,7 @@ static void say_word(struct vc_data *vc)
> static void say_prev_word(struct vc_data *vc)
> {
> u_char temp;
> - char ch;
> + u16 ch;
> u_short edge_said = 0, last_state = 0, state = 0;
>
> spk_parked |= 0x01;
> @@ -639,10 +644,10 @@ static void say_prev_word(struct vc_data
> } else
> spk_x--;
> spk_pos -= 2;
> - ch = (char)get_char(vc, (u_short *)spk_pos, &temp);
> + ch = get_char(vc, (u_short *)spk_pos, &temp);
> if (ch == SPACE || ch == 0)
> state = 0;
> - else if (IS_WDLM(ch))
> + else if (ch < 0x100 && IS_WDLM(ch))
> state = 1;
> else
> state = 2;
> @@ -663,7 +668,7 @@ static void say_prev_word(struct vc_data
> static void say_next_word(struct vc_data *vc)
> {
> u_char temp;
> - char ch;
> + u16 ch;
> u_short edge_said = 0, last_state = 2, state = 0;
>
> spk_parked |= 0x01;
> @@ -672,10 +677,10 @@ static void say_next_word(struct vc_data
> return;
> }
> while (1) {
> - ch = (char)get_char(vc, (u_short *)spk_pos, &temp);
> + ch = get_char(vc, (u_short *)spk_pos, &temp);
> if (ch == SPACE || ch == 0)
> state = 0;
> - else if (IS_WDLM(ch))
> + else if (ch < 0x100 && IS_WDLM(ch))
> state = 1;
> else
> state = 2;
> @@ -703,13 +708,18 @@ static void say_next_word(struct vc_data
> static void spell_word(struct vc_data *vc)
> {
> static char const *delay_str[] = { "", ",", ".", ". .", ". . ." };
> - char *cp = buf, *str_cap = spk_str_caps_stop;
> - char *cp1, *last_cap = spk_str_caps_stop;
> - u_char ch;
> + u16 *cp = buf;
> + char *cp1;
> + char *str_cap = spk_str_caps_stop;
> + char *last_cap = spk_str_caps_stop;
> + u16 ch;
>
> if (!get_word(vc))
> return;
> - while ((ch = (u_char)*cp)) {
> + while ((ch = *cp)) {
> + if (ch >= 0x100)
> + /* FIXME */
> + continue;
> if (cp != buf)
> synth_printf(" %s ", delay_str[spk_spell_delay]);
> if (IS_CHAR(ch, B_CAP)) {
> @@ -724,9 +734,9 @@ static void spell_word(struct vc_data *v
> synth_printf("%s", str_cap);
> last_cap = str_cap;
> }
> - if (this_speakup_key == SPELL_PHONETIC
> - && (isascii(ch) && isalpha(ch))) {
> - ch &= 31;
> + if (this_speakup_key == SPELL_PHONETIC &&
> + ch <= 0x7f && isalpha(ch)) {
> + ch &= 0x1f;
> cp1 = phonetic[--ch];
> } else {
> cp1 = spk_characters[ch];
> @@ -751,7 +761,7 @@ static int get_line(struct vc_data *vc)
> spk_old_attr = spk_attr;
> spk_attr = get_attributes(vc, (u_short *)spk_pos);
> for (i = 0; i < vc->vc_cols; i++) {
> - buf[i] = (u_char)get_char(vc, (u_short *)tmp, &tmp2);
> + buf[i] = get_char(vc, (u_short *)tmp, &tmp2);
> tmp += 2;
> }
> for (--i; i >= 0; i--)
> @@ -763,7 +773,7 @@ static int get_line(struct vc_data *vc)
> static void say_line(struct vc_data *vc)
> {
> int i = get_line(vc);
> - char *cp;
> + u16 *cp;
> u_short saved_punc_mask = spk_punc_mask;
>
> if (i == 0) {
> @@ -816,7 +826,7 @@ static int say_from_to(struct vc_data *v
> spk_old_attr = spk_attr;
> spk_attr = get_attributes(vc, (u_short *)from);
> while (from < to) {
> - buf[i++] = (char)get_char(vc, (u_short *)from, &tmp);
> + buf[i++] = get_char(vc, (u_short *)from, &tmp);
> from += 2;
> if (i >= vc->vc_size_row)
> break;
> @@ -852,11 +862,11 @@ static void say_line_from_to(struct vc_d
>
> static int currsentence;
> static int numsentences[2];
> -static char *sentbufend[2];
> -static char *sentmarks[2][10];
> +static u16 *sentbufend[2];
> +static u16 *sentmarks[2][10];
> static int currbuf;
> static int bn;
> -static char sentbuf[2][256];
> +static u16 sentbuf[2][256];
>
> static int say_sentence_num(int num, int prev)
> {
> @@ -892,7 +902,7 @@ static int get_sentence_buf(struct vc_da
> spk_attr = get_attributes(vc, (u_short *)start);
>
> while (start < end) {
> - sentbuf[bn][i] = (char)get_char(vc, (u_short *)start, &tmp);
> + sentbuf[bn][i] = get_char(vc, (u_short *)start, &tmp);
> if (i > 0) {
> if (sentbuf[bn][i] == SPACE && sentbuf[bn][i - 1] == '.'
> && numsentences[bn] < 9) {
> @@ -995,7 +1005,7 @@ static void right_edge(struct vc_data *v
> static void say_first_char(struct vc_data *vc)
> {
> int i, len = get_line(vc);
> - u_char ch;
> + u16 ch;
>
> spk_parked |= 0x01;
> if (len == 0) {
> @@ -1015,7 +1025,7 @@ static void say_first_char(struct vc_dat
> static void say_last_char(struct vc_data *vc)
> {
> int len = get_line(vc);
> - u_char ch;
> + u16 ch;
>
> spk_parked |= 0x01;
> if (len == 0) {
> @@ -1040,9 +1050,8 @@ static void say_position(struct vc_data
> static void say_char_num(struct vc_data *vc)
> {
> u_char tmp;
> - u_short ch = get_char(vc, (u_short *)spk_pos, &tmp);
> + u16 ch = get_char(vc, (u_short *)spk_pos, &tmp);
>
> - ch &= 0xff;
> synth_printf(spk_msg_get(MSG_CHAR_INFO), ch, ch);
> }
>
> @@ -1070,10 +1079,10 @@ static void say_to_right(struct vc_data
>
> /* end of stub functions. */
>
> -static void spkup_write(const char *in_buf, int count)
> +static void spkup_write(const u16 *in_buf, int count)
> {
> static int rep_count;
> - static u_char ch = '\0', old_ch = '\0';
> + static u16 ch = '\0', old_ch = '\0';
> static u_short char_type, last_type;
> int in_count = count;
>
> @@ -1085,8 +1094,11 @@ static void spkup_write(const char *in_b
> (currsentence <= numsentences[bn]))
> synth_insert_next_index(currsentence++);
> }
> - ch = (u_char)*in_buf++;
> - char_type = spk_chartab[ch];
> + ch = *in_buf++;
> + if (ch < 0x100)
> + char_type = spk_chartab[ch];
> + else
> + char_type = ALPHA;
> if (ch == old_ch && !(char_type & B_NUM)) {
> if (++rep_count > 2)
> continue;
> @@ -1106,10 +1118,10 @@ static void spkup_write(const char *in_b
> } else if (char_type & B_ALPHA) {
> if ((synth_flags & SF_DEC) && (last_type & PUNC))
> synth_buffer_add(SPACE);
> - synth_printf("%c", ch);
> + synth_putwc_s(ch);
> } else if (char_type & B_NUM) {
> rep_count = 0;
> - synth_printf("%c", ch);
> + synth_putwc_s(ch);
> } else if (char_type & spk_punc_mask) {
> speak_char(ch);
> char_type &= ~PUNC; /* for dec nospell processing */
> @@ -1122,7 +1134,7 @@ static void spkup_write(const char *in_b
> * repeats on you don't get nothing repeated count
> */
> if (ch != old_ch)
> - synth_printf("%c", ch);
> + synth_putwc_s(ch);
> else
> rep_count = 0;
> } else {
> @@ -1533,7 +1545,7 @@ static void do_handle_cursor(struct vc_d
> spin_unlock_irqrestore(&speakup_info.spinlock, flags);
> }
>
> -static void update_color_buffer(struct vc_data *vc, const char *ic, int len)
> +static void update_color_buffer(struct vc_data *vc, const u16 *ic, int len)
> {
> int i, bi, hi;
> int vc_num = vc->vc_num;
> @@ -1548,7 +1560,7 @@ static void update_color_buffer(struct v
> speakup_console[vc_num]->ht.ry[bi] = vc->vc_y;
> }
> while ((hi < COLOR_BUFFER_SIZE) && (i < len)) {
> - if ((ic[i] > 32) && (ic[i] < 127)) {
> + if (ic[i] > 32) {
> speakup_console[vc_num]->ht.highbuf[bi][hi] = ic[i];
> hi++;
> } else if ((ic[i] == 32) && (hi != 0)) {
> @@ -1718,7 +1730,7 @@ static void speakup_bs(struct vc_data *v
> }
>
> /* called by: vt_notifier_call() */
> -static void speakup_con_write(struct vc_data *vc, const char *str, int len)
> +static void speakup_con_write(struct vc_data *vc, u16 *str, int len)
> {
> unsigned long flags;
>
> @@ -1908,6 +1920,7 @@ static int handle_goto(struct vc_data *v
> static int num;
> int maxlen;
> char *cp;
> + u16 wch;
>
> if (type == KT_SPKUP && ch == SPEAKUP_GOTO)
> goto do_goto;
> @@ -1916,18 +1929,20 @@ static int handle_goto(struct vc_data *v
> if (type != 0)
> goto oops;
> if (ch == 8) {
> + u16 wch;
> if (num == 0)
> return -1;
> - ch = goto_buf[--num];
> + wch = goto_buf[--num];
> goto_buf[num] = '\0';
> - spkup_write(&ch, 1);
> + spkup_write(&wch, 1);
> return 1;
> }
> if (ch < '+' || ch > 'y')
> goto oops;
> + wch = ch;
> goto_buf[num++] = ch;
> goto_buf[num] = '\0';
> - spkup_write(&ch, 1);
> + spkup_write(&wch, 1);
> maxlen = (*goto_buf >= '0') ? 3 : 4;
> if ((ch == '+' || ch == '-') && num == 1)
> return 1;
> @@ -2254,9 +2269,8 @@ static int vt_notifier_call(struct notif
> case VT_WRITE:
> if (param->c == '\b')
> speakup_bs(vc);
> - else if (param->c < 0x100) {
> - char d = param->c;
> -
> + else {
> + u16 d = param->c;
> speakup_con_write(vc, &d, 1);
> }
> break;
> Index: linux-4.10/drivers/staging/speakup/spk_types.h
> ===================================================================
> --- linux-4.10.orig/drivers/staging/speakup/spk_types.h
> +++ linux-4.10/drivers/staging/speakup/spk_types.h
> @@ -55,7 +55,7 @@ struct spk_highlight_color_track {
> /* Count of each background color */
> unsigned int bgcount[8];
> /* Buffer for characters drawn with each background color */
> - char highbuf[8][COLOR_BUFFER_SIZE];
> + u16 highbuf[8][COLOR_BUFFER_SIZE];
> /* Current index into highbuf */
> unsigned int highsize[8];
> /* Reading Position for each color */
> Index: linux-4.10/drivers/staging/speakup/speakup.h
> ===================================================================
> --- linux-4.10.orig/drivers/staging/speakup/speakup.h
> +++ linux-4.10/drivers/staging/speakup/speakup.h
> @@ -38,6 +38,7 @@
> #define B_SYM 0x0800
> #define B_CAPSYM (B_CAP|B_SYM)
>
> +/* FIXME: u16 */
> #define IS_WDLM(x) (spk_chartab[((u_char)x)]&B_WDLM)
> #define IS_CHAR(x, type) (spk_chartab[((u_char)x)]&type)
> #define IS_TYPE(x, type) ((spk_chartab[((u_char)x)]&type) == type)
Reviewed-by: Okash Khawaja <okash.khawaja@...il.com>
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