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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/harfbuzz/src/hb-buffer-deserialize-text-unicode.rl
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/harfbuzz/src/hb-buffer-deserialize-text-unicode.rl')
-rw-r--r--gfx/harfbuzz/src/hb-buffer-deserialize-text-unicode.rl129
1 files changed, 129 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-buffer-deserialize-text-unicode.rl b/gfx/harfbuzz/src/hb-buffer-deserialize-text-unicode.rl
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+/*
+ * Copyright © 2013 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_BUFFER_DESERIALIZE_TEXT_UNICODE_HH
+#define HB_BUFFER_DESERIALIZE_TEXT_UNICODE_HH
+
+#include "hb.hh"
+
+%%{
+
+machine deserialize_text_unicode;
+alphtype unsigned char;
+write data;
+
+action clear_item {
+ hb_memset (&info, 0, sizeof (info));
+}
+
+action add_item {
+ buffer->add_info (info);
+ if (unlikely (!buffer->successful))
+ return false;
+ if (buffer->have_positions)
+ buffer->pos[buffer->len - 1] = pos;
+ *end_ptr = p;
+}
+
+action tok {
+ tok = p;
+}
+
+action parse_hexdigits {if (!parse_hex (tok, p, &info.codepoint )) return false; }
+
+action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; }
+
+unum = '0' | [1-9] digit*;
+num = '-'? unum;
+
+cluster = '=' (unum >tok %parse_cluster);
+
+unicode = [Uu] '+'? xdigit+ >tok %parse_hexdigits;
+
+unicode_item =
+ (
+ unicode
+ cluster?
+ )
+ >clear_item
+ %add_item
+ ;
+
+unicodes = unicode_item (space* '|' space* unicode_item)* space*;
+
+main := space* unicodes;
+
+}%%
+
+static hb_bool_t
+_hb_buffer_deserialize_text_unicode (hb_buffer_t *buffer,
+ const char *buf,
+ unsigned int buf_len,
+ const char **end_ptr,
+ hb_font_t *font)
+{
+ const char *p = buf, *pe = buf + buf_len, *eof = pe, *orig_pe = pe;
+
+ while (p < pe && ISSPACE (*p))
+ p++;
+ if (p < pe && *p == (buffer->len ? '|' : '<'))
+ *end_ptr = ++p;
+
+ const char *end = strchr ((char *) p, '>');
+ if (end)
+ pe = eof = end;
+ else
+ {
+ end = strrchr ((char *) p, '|');
+ if (end)
+ pe = eof = end;
+ else
+ pe = eof = p;
+ }
+
+
+ const char *tok = nullptr;
+ int cs;
+ hb_glyph_info_t info = {0};
+ const hb_glyph_position_t pos = {0};
+ %%{
+ write init;
+ write exec;
+ }%%
+
+ if (pe < orig_pe && *pe == '>')
+ {
+ pe++;
+ if (p == pe)
+ p++;
+ }
+
+ *end_ptr = p;
+
+ return p == pe;
+}
+
+#endif /* HB_BUFFER_DESERIALIZE_TEXT_UNICODE_HH */