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Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh')
-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh97
1 files changed, 50 insertions, 47 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh
index 9cad5206e23..8b432b5f96f 100644
--- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh
+++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-buffer.hh
@@ -139,7 +139,7 @@ struct hb_buffer_t
/* Methods */
- bool in_error () const { return !successful; }
+ HB_NODISCARD bool in_error () const { return !successful; }
void allocate_var (unsigned int start, unsigned int count)
{
@@ -186,7 +186,7 @@ struct hb_buffer_t
hb_glyph_info_t &prev () { return out_info[out_len ? out_len - 1 : 0]; }
hb_glyph_info_t prev () const { return out_info[out_len ? out_len - 1 : 0]; }
- bool has_separate_output () const { return info != out_info; }
+ HB_NODISCARD bool has_separate_output () const { return info != out_info; }
HB_INTERNAL void reset ();
@@ -210,86 +210,89 @@ struct hb_buffer_t
HB_INTERNAL void clear_output ();
HB_INTERNAL void clear_positions ();
- HB_INTERNAL void replace_glyphs (unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data);
-
- void replace_glyph (hb_codepoint_t glyph_index)
+ template <typename T>
+ HB_NODISCARD bool replace_glyphs (unsigned int num_in,
+ unsigned int num_out,
+ const T *glyph_data)
{
- if (unlikely (out_info != info || out_len != idx)) {
- if (unlikely (!make_room_for (1, 1))) return;
- out_info[out_len] = info[idx];
- }
- out_info[out_len].codepoint = glyph_index;
+ if (unlikely (!make_room_for (num_in, num_out))) return false;
- idx++;
- out_len++;
- }
- /* Makes a copy of the glyph at idx to output and replace glyph_index */
- hb_glyph_info_t & output_glyph (hb_codepoint_t glyph_index)
- {
- if (unlikely (!make_room_for (0, 1))) return Crap (hb_glyph_info_t);
+ assert (idx + num_in <= len);
- if (unlikely (idx == len && !out_len))
- return Crap (hb_glyph_info_t);
+ merge_clusters (idx, idx + num_in);
- out_info[out_len] = idx < len ? info[idx] : out_info[out_len - 1];
- out_info[out_len].codepoint = glyph_index;
+ hb_glyph_info_t &orig_info = idx < len ? cur() : prev();
- out_len++;
+ hb_glyph_info_t *pinfo = &out_info[out_len];
+ for (unsigned int i = 0; i < num_out; i++)
+ {
+ *pinfo = orig_info;
+ pinfo->codepoint = glyph_data[i];
+ pinfo++;
+ }
- return out_info[out_len - 1];
+ idx += num_in;
+ out_len += num_out;
+ return true;
}
- void output_info (const hb_glyph_info_t &glyph_info)
+
+ HB_NODISCARD bool replace_glyph (hb_codepoint_t glyph_index)
+ { return replace_glyphs (1, 1, &glyph_index); }
+
+ /* Makes a copy of the glyph at idx to output and replace glyph_index */
+ HB_NODISCARD bool output_glyph (hb_codepoint_t glyph_index)
+ { return replace_glyphs (0, 1, &glyph_index); }
+
+ HB_NODISCARD bool output_info (const hb_glyph_info_t &glyph_info)
{
- if (unlikely (!make_room_for (0, 1))) return;
+ if (unlikely (!make_room_for (0, 1))) return false;
out_info[out_len] = glyph_info;
out_len++;
+ return true;
}
/* Copies glyph at idx to output but doesn't advance idx */
- void copy_glyph ()
+ HB_NODISCARD bool copy_glyph ()
{
- if (unlikely (!make_room_for (0, 1))) return;
-
- out_info[out_len] = info[idx];
-
- out_len++;
+ /* Extra copy because cur()'s return can be freed within
+ * output_info() call if buffer reallocates. */
+ return output_info (hb_glyph_info_t (cur()));
}
+
/* Copies glyph at idx to output and advance idx.
* If there's no output, just advance idx. */
- void
- next_glyph ()
+ HB_NODISCARD bool next_glyph ()
{
if (have_output)
{
if (out_info != info || out_len != idx)
{
- if (unlikely (!make_room_for (1, 1))) return;
+ if (unlikely (!make_room_for (1, 1))) return false;
out_info[out_len] = info[idx];
}
out_len++;
}
idx++;
+ return true;
}
/* Copies n glyphs at idx to output and advance idx.
* If there's no output, just advance idx. */
- void
- next_glyphs (unsigned int n)
+ HB_NODISCARD bool next_glyphs (unsigned int n)
{
if (have_output)
{
if (out_info != info || out_len != idx)
{
- if (unlikely (!make_room_for (n, n))) return;
+ if (unlikely (!make_room_for (n, n))) return false;
memmove (out_info + out_len, info + idx, n * sizeof (out_info[0]));
}
out_len += n;
}
idx += n;
+ return true;
}
/* Advance idx without copying to output. */
void skip_glyph () { idx++; }
@@ -329,14 +332,14 @@ struct hb_buffer_t
/* Internal methods */
- HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
+ HB_NODISCARD HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
- HB_INTERNAL bool enlarge (unsigned int size);
+ HB_NODISCARD HB_INTERNAL bool enlarge (unsigned int size);
- bool ensure (unsigned int size)
+ HB_NODISCARD bool ensure (unsigned int size)
{ return likely (!size || size < allocated) ? true : enlarge (size); }
- bool ensure_inplace (unsigned int size)
+ HB_NODISCARD bool ensure_inplace (unsigned int size)
{ return likely (!size || size < allocated); }
void assert_glyphs ()
@@ -349,7 +352,7 @@ struct hb_buffer_t
assert ((content_type == HB_BUFFER_CONTENT_TYPE_UNICODE) ||
(!len && (content_type == HB_BUFFER_CONTENT_TYPE_INVALID)));
}
- bool ensure_glyphs ()
+ HB_NODISCARD bool ensure_glyphs ()
{
if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_GLYPHS))
{
@@ -360,7 +363,7 @@ struct hb_buffer_t
}
return true;
}
- bool ensure_unicode ()
+ HB_NODISCARD bool ensure_unicode ()
{
if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_UNICODE))
{
@@ -372,8 +375,8 @@ struct hb_buffer_t
return true;
}
- HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
- HB_INTERNAL bool shift_forward (unsigned int count);
+ HB_NODISCARD HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
+ HB_NODISCARD HB_INTERNAL bool shift_forward (unsigned int count);
typedef long scratch_buffer_t;
HB_INTERNAL scratch_buffer_t *get_scratch_buffer (unsigned int *size);