mirror of https://github.com/tmux/tmux.git
Sync OpenBSD patchset 421:
Try to reduce the UTF-8 mess. Get rid of passing around u_char[4]s and define a struct utf8_data which has character data, size (sequence length) and width. Move UTF-8 character collection into two functions utf8_open/utf8_append in utf8.c which fill in this struct and use these functions from input.c and the various functions in screen-write.c. Space for rather more data than is necessary for one UTF-8 sequence is in the utf8_data struct because screen_write_copy is still nasty and needs to reinject the character (after combining) into screen_write_cell.pull/1/head
Tiago Cunha
parent
c643ac4827
commit
f41a3914a5
42
input.c
42
input.c
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@ -1,4 +1,4 @@
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/* $Id: input.c,v 1.97 2009-10-15 01:53:48 tcunha Exp $ */
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/* $Id: input.c,v 1.98 2009-10-23 17:16:24 tcunha Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -572,15 +572,14 @@ input_state_string_escape(u_char ch, struct input_ctx *ictx)
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void
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input_state_utf8(u_char ch, struct input_ctx *ictx)
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{
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log_debug2("-- un %zu: %hhu (%c)", ictx->off, ch, ch);
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log_debug2("-- utf8 next: %zu: %hhu (%c)", ictx->off, ch, ch);
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ictx->utf8_buf[ictx->utf8_off++] = ch;
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if (--ictx->utf8_len != 0)
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return;
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if (utf8_append(&ictx->utf8data, ch))
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return; /* more to come */
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input_state(ictx, input_state_first);
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ictx->cell.flags |= GRID_FLAG_UTF8;
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screen_write_cell(&ictx->ctx, &ictx->cell, ictx->utf8_buf);
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screen_write_cell(&ictx->ctx, &ictx->cell, &ictx->utf8data);
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ictx->cell.flags &= ~GRID_FLAG_UTF8;
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}
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@ -590,40 +589,17 @@ input_handle_character(u_char ch, struct input_ctx *ictx)
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struct window_pane *wp = ictx->wp;
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if (ch > 0x7f && options_get_number(&wp->window->options, "utf8")) {
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/*
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* UTF-8 sequence.
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*
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* 11000010-11011111 C2-DF start of 2-byte sequence
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* 11100000-11101111 E0-EF start of 3-byte sequence
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* 11110000-11110100 F0-F4 start of 4-byte sequence
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*/
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memset(ictx->utf8_buf, 0xff, sizeof ictx->utf8_buf);
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ictx->utf8_buf[0] = ch;
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ictx->utf8_off = 1;
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if (ch >= 0xc2 && ch <= 0xdf) {
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log_debug2("-- u2 %zu: %hhu (%c)", ictx->off, ch, ch);
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if (utf8_open(&ictx->utf8data, ch)) {
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log_debug2("-- utf8 size %u: %zu: %hhu (%c)",
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ictx->utf8data.size, ictx->off, ch, ch);
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input_state(ictx, input_state_utf8);
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ictx->utf8_len = 1;
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return;
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}
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if (ch >= 0xe0 && ch <= 0xef) {
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log_debug2("-- u3 %zu: %hhu (%c)", ictx->off, ch, ch);
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input_state(ictx, input_state_utf8);
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ictx->utf8_len = 2;
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return;
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}
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if (ch >= 0xf0 && ch <= 0xf4) {
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log_debug2("-- u4 %zu: %hhu (%c)", ictx->off, ch, ch);
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input_state(ictx, input_state_utf8);
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ictx->utf8_len = 3;
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return;
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}
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}
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log_debug2("-- ch %zu: %hhu (%c)", ictx->off, ch, ch);
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ictx->cell.data = ch;
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screen_write_cell(&ictx->ctx, &ictx->cell, ictx->utf8_buf);
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screen_write_cell(&ictx->ctx, &ictx->cell, NULL);
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}
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void
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187
screen-write.c
187
screen-write.c
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@ -1,4 +1,4 @@
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/* $Id: screen-write.c,v 1.82 2009-10-23 17:13:10 tcunha Exp $ */
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/* $Id: screen-write.c,v 1.83 2009-10-23 17:16:24 tcunha Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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@ -24,7 +24,8 @@
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void screen_write_initctx(struct screen_write_ctx *, struct tty_ctx *, int);
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void screen_write_overwrite(struct screen_write_ctx *);
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int screen_write_combine(struct screen_write_ctx *, u_char *);
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int screen_write_combine(
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struct screen_write_ctx *, const struct utf8_data *);
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/* Initialise writing with a window. */
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void
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@ -92,10 +93,11 @@ screen_write_cstrlen(int utf8flag, const char *fmt, ...)
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size_t printflike2
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screen_write_strlen(int utf8flag, const char *fmt, ...)
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{
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va_list ap;
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char *msg;
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u_char *ptr, utf8buf[4];
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size_t left, size = 0;
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va_list ap;
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char *msg;
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struct utf8_data utf8data;
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u_char *ptr;
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size_t left, size = 0;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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@ -103,24 +105,17 @@ screen_write_strlen(int utf8flag, const char *fmt, ...)
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ptr = msg;
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while (*ptr != '\0') {
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if (utf8flag && *ptr > 0x7f) {
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memset(utf8buf, 0xff, sizeof utf8buf);
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if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) {
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ptr++;
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left = strlen(ptr);
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if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
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memcpy(utf8buf, ptr, 2);
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ptr += 2;
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} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
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memcpy(utf8buf, ptr, 3);
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ptr += 3;
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} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
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memcpy(utf8buf, ptr, 4);
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ptr += 4;
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} else {
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*utf8buf = *ptr;
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if (left < utf8data.size - 1)
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break;
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while (utf8_append(&utf8data, *ptr))
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ptr++;
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}
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size += utf8_width(utf8buf);
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ptr++;
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size += utf8data.width;
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} else {
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size++;
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ptr++;
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@ -159,47 +154,38 @@ void
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screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
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struct grid_cell *gc, int utf8flag, const char *fmt, va_list ap)
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{
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char *msg;
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u_char *ptr, utf8buf[4];
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size_t left, size = 0;
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int width;
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char *msg;
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struct utf8_data utf8data;
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u_char *ptr;
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size_t left, size = 0;
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xvasprintf(&msg, fmt, ap);
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ptr = msg;
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while (*ptr != '\0') {
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if (utf8flag && *ptr > 0x7f) {
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memset(utf8buf, 0xff, sizeof utf8buf);
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if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) {
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ptr++;
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left = strlen(ptr);
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if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
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memcpy(utf8buf, ptr, 2);
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ptr += 2;
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} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
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memcpy(utf8buf, ptr, 3);
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ptr += 3;
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} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
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memcpy(utf8buf, ptr, 4);
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ptr += 4;
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} else {
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*utf8buf = *ptr;
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if (left < utf8data.size - 1)
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break;
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while (utf8_append(&utf8data, *ptr))
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ptr++;
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}
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ptr++;
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width = utf8_width(utf8buf);
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if (maxlen > 0 && size + width > (size_t) maxlen) {
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if (maxlen > 0 &&
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size + utf8data.width > (size_t) maxlen) {
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while (size < (size_t) maxlen) {
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screen_write_putc(ctx, gc, ' ');
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size++;
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}
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break;
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}
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size += width;
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size += utf8data.width;
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gc->flags |= GRID_FLAG_UTF8;
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screen_write_cell(ctx, gc, utf8buf);
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screen_write_cell(ctx, gc, &utf8data);
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gc->flags &= ~GRID_FLAG_UTF8;
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} else {
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if (maxlen > 0 && size + 1 > (size_t) maxlen)
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break;
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@ -219,11 +205,11 @@ screen_write_cnputs(struct screen_write_ctx *ctx,
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ssize_t maxlen, struct grid_cell *gc, int utf8flag, const char *fmt, ...)
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{
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struct grid_cell lgc;
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struct utf8_data utf8data;
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va_list ap;
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char *msg;
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u_char *ptr, *last, utf8buf[4];
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u_char *ptr, *last;
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size_t left, size = 0;
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int width;
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va_start(ap, fmt);
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xvasprintf(&msg, fmt, ap);
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@ -247,38 +233,29 @@ screen_write_cnputs(struct screen_write_ctx *ctx,
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continue;
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}
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if (utf8flag && *ptr > 0x7f) {
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memset(utf8buf, 0xff, sizeof utf8buf);
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if (utf8flag && *ptr > 0x7f && utf8_open(&utf8data, *ptr)) {
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ptr++;
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left = strlen(ptr);
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if (*ptr >= 0xc2 && *ptr <= 0xdf && left >= 2) {
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memcpy(utf8buf, ptr, 2);
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ptr += 2;
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} else if (*ptr >= 0xe0 && *ptr <= 0xef && left >= 3) {
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memcpy(utf8buf, ptr, 3);
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ptr += 3;
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} else if (*ptr >= 0xf0 && *ptr <= 0xf4 && left >= 4) {
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memcpy(utf8buf, ptr, 4);
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ptr += 4;
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} else {
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*utf8buf = *ptr;
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if (left < utf8data.size - 1)
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break;
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while (utf8_append(&utf8data, *ptr))
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ptr++;
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}
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ptr++;
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width = utf8_width(utf8buf);
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if (maxlen > 0 && size + width > (size_t) maxlen) {
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if (maxlen > 0 &&
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size + utf8data.width > (size_t) maxlen) {
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while (size < (size_t) maxlen) {
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screen_write_putc(ctx, gc, ' ');
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size++;
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}
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break;
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}
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size += width;
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size += utf8data.width;
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lgc.flags |= GRID_FLAG_UTF8;
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screen_write_cell(ctx, &lgc, utf8buf);
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screen_write_cell(ctx, &lgc, &utf8data);
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lgc.flags &= ~GRID_FLAG_UTF8;
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} else {
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if (maxlen > 0 && size + 1 > (size_t) maxlen)
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break;
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@ -375,8 +352,9 @@ screen_write_copy(struct screen_write_ctx *ctx,
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struct grid *gd = src->grid;
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struct grid_line *gl;
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const struct grid_cell *gc;
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u_char *udata;
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u_int xx, yy, cx, cy, ax, bx;
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const struct grid_utf8 *gu;
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struct utf8_data utf8data;
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u_int xx, yy, cx, cy, ax, bx, i;
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cx = s->cx;
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cy = s->cy;
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@ -397,21 +375,30 @@ screen_write_copy(struct screen_write_ctx *ctx,
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bx = gl->cellsize;
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else
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bx = px + nx;
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for (xx = ax; xx < bx; xx++) {
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udata = NULL;
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if (xx >= gl->cellsize)
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gc = &grid_default_cell;
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else {
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else
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gc = &gl->celldata[xx];
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if (gc->flags & GRID_FLAG_UTF8)
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udata = gl->utf8data[xx].data;
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if (gc->flags & GRID_FLAG_UTF8) {
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gu = &gl->utf8data[xx];
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memcpy(utf8data.data,
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gu->data, sizeof utf8data.data);
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utf8data.width = gu->width;
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utf8data.size = 0;
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for (i = 0; i < UTF8_SIZE; i++) {
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if (gu->data[i] == 0xff)
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break;
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utf8data.size++;
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}
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}
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screen_write_cell(ctx, gc, udata);
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screen_write_cell(ctx, gc, &utf8data);
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}
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if (px + nx == gd->sx && px + nx > gl->cellsize)
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screen_write_clearendofline(ctx);
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} else
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screen_write_clearline(ctx);
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screen_write_clearline(ctx);
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cy++;
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screen_write_cursormove(ctx, cx, cy);
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}
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@ -972,8 +959,8 @@ screen_write_clearscreen(struct screen_write_ctx *ctx)
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/* Write cell data. */
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void
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screen_write_cell(
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struct screen_write_ctx *ctx, const struct grid_cell *gc, u_char *udata)
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screen_write_cell(struct screen_write_ctx *ctx,
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const struct grid_cell *gc, const struct utf8_data *utf8data)
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{
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struct screen *s = ctx->s;
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struct grid *gd = s->grid;
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@ -988,12 +975,9 @@ screen_write_cell(
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return;
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/* Find character width. */
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if (gc->flags & GRID_FLAG_UTF8) {
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width = utf8_width(udata);
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gu.width = width;
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memcpy(&gu.data, udata, sizeof gu.data);
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} else
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if (gc->flags & GRID_FLAG_UTF8)
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width = utf8data->width;
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else
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width = 1;
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/*
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@ -1009,7 +993,7 @@ screen_write_cell(
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* there is space.
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*/
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if (width == 0) {
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if (screen_write_combine(ctx, udata) == 0) {
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if (screen_write_combine(ctx, utf8data) == 0) {
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screen_write_initctx(ctx, &ttyctx, 0);
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tty_write(tty_cmd_utf8character, &ttyctx);
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}
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@ -1028,11 +1012,6 @@ screen_write_cell(
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/* Check this will fit on the current line and wrap if not. */
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if (s->cx > screen_size_x(s) - width) {
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/*
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* Don't update the terminal now, just update the screen and
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* leave the cursor to scroll naturally, unless this is only
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* part of the screen width.
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*/
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screen_write_linefeed(ctx, 1);
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s->cx = 0; /* carriage return */
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}
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@ -1056,8 +1035,15 @@ screen_write_cell(
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/* Set the cell. */
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grid_view_set_cell(gd, s->cx, s->cy, gc);
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if (gc->flags & GRID_FLAG_UTF8)
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if (gc->flags & GRID_FLAG_UTF8) {
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/* Construct UTF-8 and write it. */
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gu.width = utf8data->width;
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memset(gu.data, 0xff, sizeof gu.data);
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if (utf8data->size > sizeof gu.data)
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fatalx("UTF-8 data overflow");
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memcpy(gu.data, utf8data->data, utf8data->size);
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grid_view_set_utf8(gd, s->cx, s->cy, &gu);
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}
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/* Move the cursor. */
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s->cx += width;
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@ -1085,13 +1071,14 @@ screen_write_cell(
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/* Combine a UTF-8 zero-width character onto the previous. */
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int
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screen_write_combine(struct screen_write_ctx *ctx, u_char *udata)
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screen_write_combine(
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struct screen_write_ctx *ctx, const struct utf8_data *utf8data)
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{
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struct screen *s = ctx->s;
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struct grid *gd = s->grid;
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struct grid_cell *gc;
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struct grid_utf8 *gu, tmp_gu;
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u_int i, old_size, new_size;
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u_int i, old_size;
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/* Can't combine if at 0. */
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if (s->cx == 0)
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@ -1108,23 +1095,15 @@ screen_write_combine(struct screen_write_ctx *ctx, u_char *udata)
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gc->flags |= GRID_FLAG_UTF8;
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}
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/* Get the previous cell's UTF-8 data. */
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/* Get the previous cell's UTF-8 data and its size. */
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gu = grid_view_get_utf8(gd, s->cx - 1, s->cy);
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/* Find the new size. */
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for (new_size = 0; new_size < UTF8_SIZE; new_size++) {
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if (udata[new_size] == 0xff)
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break;
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}
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/* And the old size. */
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for (old_size = 0; old_size < UTF8_SIZE; old_size++) {
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if (gu->data[old_size] == 0xff)
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break;
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}
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/* If there isn't space, scrap this character. */
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if (old_size + new_size > UTF8_SIZE) {
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if (old_size + utf8data->size > UTF8_SIZE) {
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for (i = 0; i < gu->width && i != UTF8_SIZE; i++)
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gu->data[i] = '_';
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if (i != UTF8_SIZE)
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@ -1133,9 +1112,9 @@ screen_write_combine(struct screen_write_ctx *ctx, u_char *udata)
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}
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|
||||
/* Otherwise save the character. */
|
||||
memcpy(gu->data + old_size, udata, new_size);
|
||||
if (old_size + new_size != UTF8_SIZE)
|
||||
gu->data[old_size + new_size] = 0xff;
|
||||
memcpy(gu->data + old_size, utf8data->data, utf8data->size);
|
||||
if (old_size + utf8data->size != UTF8_SIZE)
|
||||
gu->data[old_size + utf8data->size] = 0xff;
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
|
|
|||
31
tmux.h
31
tmux.h
|
|
@ -1,4 +1,4 @@
|
|||
/* $Id: tmux.h,v 1.480 2009-10-23 17:13:10 tcunha Exp $ */
|
||||
/* $Id: tmux.h,v 1.481 2009-10-23 17:16:24 tcunha Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
|
||||
|
|
@ -475,6 +475,23 @@ struct mode_key_table {
|
|||
#define MODE_KKEYPAD 0x8
|
||||
#define MODE_MOUSE 0x10
|
||||
|
||||
/*
|
||||
* A single UTF-8 character.
|
||||
*
|
||||
* The data member in this must be UTF8_SIZE to allow screen_write_copy to
|
||||
* reinject stored UTF-8 data back into screen_write_cell after combining (ugh
|
||||
* XXX XXX).
|
||||
*/
|
||||
#define UTF8_SIZE 9
|
||||
struct utf8_data {
|
||||
u_char data[UTF8_SIZE];
|
||||
|
||||
size_t have;
|
||||
size_t size;
|
||||
|
||||
u_int width;
|
||||
};
|
||||
|
||||
/* Grid output. */
|
||||
#if defined(DEBUG) && \
|
||||
((defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
|
||||
|
|
@ -514,7 +531,6 @@ struct grid_cell {
|
|||
} __packed;
|
||||
|
||||
/* Grid cell UTF-8 data. Used instead of data in grid_cell for UTF-8 cells. */
|
||||
#define UTF8_SIZE 9
|
||||
struct grid_utf8 {
|
||||
u_char width;
|
||||
u_char data[UTF8_SIZE];
|
||||
|
|
@ -670,9 +686,7 @@ struct input_ctx {
|
|||
#define STRING_APPLICATION 1
|
||||
#define STRING_NAME 2
|
||||
|
||||
u_char utf8_buf[4];
|
||||
u_int utf8_len;
|
||||
u_int utf8_off;
|
||||
struct utf8_data utf8data;
|
||||
|
||||
u_char intermediate;
|
||||
void *(*state)(u_char, struct input_ctx *);
|
||||
|
|
@ -1680,8 +1694,8 @@ void screen_write_kkeypadmode(struct screen_write_ctx *, int);
|
|||
void screen_write_clearendofscreen(struct screen_write_ctx *);
|
||||
void screen_write_clearstartofscreen(struct screen_write_ctx *);
|
||||
void screen_write_clearscreen(struct screen_write_ctx *);
|
||||
void screen_write_cell(
|
||||
struct screen_write_ctx *, const struct grid_cell *, u_char *);
|
||||
void screen_write_cell(struct screen_write_ctx *,
|
||||
const struct grid_cell *, const struct utf8_data *);
|
||||
|
||||
/* screen-redraw.c */
|
||||
void screen_redraw_screen(struct client *, int);
|
||||
|
|
@ -1836,7 +1850,8 @@ void session_group_synchronize1(struct session *, struct session *);
|
|||
|
||||
/* utf8.c */
|
||||
void utf8_build(void);
|
||||
int utf8_width(const u_char *);
|
||||
int utf8_open(struct utf8_data *, u_char);
|
||||
int utf8_append(struct utf8_data *, u_char);
|
||||
|
||||
/* osdep-*.c */
|
||||
char *osdep_get_name(int, char *);
|
||||
|
|
|
|||
7
tty.c
7
tty.c
|
|
@ -1,4 +1,4 @@
|
|||
/* $Id: tty.c,v 1.157 2009-10-23 17:13:10 tcunha Exp $ */
|
||||
/* $Id: tty.c,v 1.158 2009-10-23 17:16:24 tcunha Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
|
||||
|
|
@ -347,7 +347,7 @@ tty_putc(struct tty *tty, u_char ch)
|
|||
void
|
||||
tty_pututf8(struct tty *tty, const struct grid_utf8 *gu)
|
||||
{
|
||||
u_int i, width;
|
||||
u_int i;
|
||||
|
||||
for (i = 0; i < UTF8_SIZE; i++) {
|
||||
if (gu->data[i] == 0xff)
|
||||
|
|
@ -357,8 +357,7 @@ tty_pututf8(struct tty *tty, const struct grid_utf8 *gu)
|
|||
write(tty->log_fd, &gu->data[i], 1);
|
||||
}
|
||||
|
||||
width = utf8_width(gu->data);
|
||||
tty->cx += width;
|
||||
tty->cx += gu->width;
|
||||
}
|
||||
|
||||
void
|
||||
|
|
|
|||
118
utf8.c
118
utf8.c
|
|
@ -1,4 +1,4 @@
|
|||
/* $Id: utf8.c,v 1.9 2009-06-25 16:21:32 nicm Exp $ */
|
||||
/* $Id: utf8.c,v 1.10 2009-10-23 17:16:25 tcunha Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
|
||||
|
|
@ -196,9 +196,56 @@ struct utf8_width_entry utf8_width_table[] = {
|
|||
struct utf8_width_entry *utf8_width_root = NULL;
|
||||
|
||||
int utf8_overlap(struct utf8_width_entry *, struct utf8_width_entry *);
|
||||
void utf8_print(struct utf8_width_entry *, int);
|
||||
u_int utf8_combine(const u_char *);
|
||||
u_int utf8_combine(const struct utf8_data *);
|
||||
u_int utf8_width(const struct utf8_data *);
|
||||
|
||||
/*
|
||||
* Open UTF-8 sequence.
|
||||
*
|
||||
* 11000010-11011111 C2-DF start of 2-byte sequence
|
||||
* 11100000-11101111 E0-EF start of 3-byte sequence
|
||||
* 11110000-11110100 F0-F4 start of 4-byte sequence
|
||||
*
|
||||
* Returns 1 if more UTF-8 to come, 0 if not UTF-8.
|
||||
*/
|
||||
int
|
||||
utf8_open(struct utf8_data *utf8data, u_char ch)
|
||||
{
|
||||
memset(utf8data, 0, sizeof *utf8data);
|
||||
if (ch >= 0xc2 && ch <= 0xdf)
|
||||
utf8data->size = 2;
|
||||
else if (ch >= 0xe0 && ch <= 0xef)
|
||||
utf8data->size = 3;
|
||||
else if (ch >= 0xf0 && ch <= 0xf4)
|
||||
utf8data->size = 4;
|
||||
else
|
||||
return (0);
|
||||
utf8_append(utf8data, ch);
|
||||
return (1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Append character to UTF-8, closing if finished.
|
||||
*
|
||||
* Returns 1 if more UTF-8 data to come, 1 if finished.
|
||||
*/
|
||||
int
|
||||
utf8_append(struct utf8_data *utf8data, u_char ch)
|
||||
{
|
||||
if (utf8data->have >= utf8data->size)
|
||||
fatalx("UTF-8 character overflow");
|
||||
if (utf8data->size > sizeof utf8data->data)
|
||||
fatalx("UTF-8 character size too large");
|
||||
|
||||
utf8data->data[utf8data->have++] = ch;
|
||||
if (utf8data->have != utf8data->size)
|
||||
return (1);
|
||||
|
||||
utf8data->width = utf8_width(utf8data);
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* Check if two width tree entries overlap. */
|
||||
int
|
||||
utf8_overlap(
|
||||
struct utf8_width_entry *item1, struct utf8_width_entry *item2)
|
||||
|
|
@ -214,6 +261,7 @@ utf8_overlap(
|
|||
return (0);
|
||||
}
|
||||
|
||||
/* Build UTF-8 width tree. */
|
||||
void
|
||||
utf8_build(void)
|
||||
{
|
||||
|
|
@ -240,52 +288,50 @@ utf8_build(void)
|
|||
}
|
||||
}
|
||||
|
||||
void
|
||||
utf8_print(struct utf8_width_entry *node, int n)
|
||||
{
|
||||
log_debug("%*s%04x -> %04x", n, " ", node->first, node->last);
|
||||
if (node->left != NULL)
|
||||
utf8_print(node->left, n + 1);
|
||||
if (node->right != NULL)
|
||||
utf8_print(node->right, n + 1);
|
||||
}
|
||||
|
||||
/* Combine UTF-8 into 32-bit Unicode. */
|
||||
u_int
|
||||
utf8_combine(const u_char *data)
|
||||
utf8_combine(const struct utf8_data *utf8data)
|
||||
{
|
||||
u_int uvalue;
|
||||
u_int value;
|
||||
|
||||
if (data[1] == 0xff)
|
||||
uvalue = data[0];
|
||||
else if (data[2] == 0xff) {
|
||||
uvalue = data[1] & 0x3f;
|
||||
uvalue |= (data[0] & 0x1f) << 6;
|
||||
} else if (data[3] == 0xff) {
|
||||
uvalue = data[2] & 0x3f;
|
||||
uvalue |= (data[1] & 0x3f) << 6;
|
||||
uvalue |= (data[0] & 0x0f) << 12;
|
||||
} else {
|
||||
uvalue = data[3] & 0x3f;
|
||||
uvalue |= (data[2] & 0x3f) << 6;
|
||||
uvalue |= (data[1] & 0x3f) << 12;
|
||||
uvalue |= (data[0] & 0x3f) << 18;
|
||||
value = 0xff;
|
||||
switch (utf8data->size) {
|
||||
case 1:
|
||||
value = utf8data->data[0];
|
||||
break;
|
||||
case 2:
|
||||
value = utf8data->data[1] & 0x3f;
|
||||
value |= (utf8data->data[0] & 0x1f) << 6;
|
||||
break;
|
||||
case 3:
|
||||
value = utf8data->data[2] & 0x3f;
|
||||
value |= (utf8data->data[1] & 0x3f) << 6;
|
||||
value |= (utf8data->data[0] & 0x0f) << 12;
|
||||
break;
|
||||
case 4:
|
||||
value = utf8data->data[3] & 0x3f;
|
||||
value |= (utf8data->data[2] & 0x3f) << 6;
|
||||
value |= (utf8data->data[1] & 0x3f) << 12;
|
||||
value |= (utf8data->data[0] & 0x3f) << 18;
|
||||
break;
|
||||
}
|
||||
return (uvalue);
|
||||
return (value);
|
||||
}
|
||||
|
||||
int
|
||||
utf8_width(const u_char *udata)
|
||||
/* Lookup width of UTF-8 data in tree. */
|
||||
u_int
|
||||
utf8_width(const struct utf8_data *utf8data)
|
||||
{
|
||||
struct utf8_width_entry *item;
|
||||
u_int uvalue;
|
||||
u_int value;
|
||||
|
||||
uvalue = utf8_combine(udata);
|
||||
value = utf8_combine(utf8data);
|
||||
|
||||
item = utf8_width_root;
|
||||
while (item != NULL) {
|
||||
if (uvalue < item->first)
|
||||
if (value < item->first)
|
||||
item = item->left;
|
||||
else if (uvalue > item->last)
|
||||
else if (value > item->last)
|
||||
item = item->right;
|
||||
else
|
||||
return (item->width);
|
||||
|
|
|
|||
Loading…
Reference in New Issue