diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-buffer.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-buffer.hh | 97 |
1 files changed, 50 insertions, 47 deletions
diff --git a/thirdparty/harfbuzz/src/hb-buffer.hh b/thirdparty/harfbuzz/src/hb-buffer.hh index 9cad5206e2..8b432b5f96 100644 --- a/thirdparty/harfbuzz/src/hb-buffer.hh +++ b/thirdparty/harfbuzz/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); |