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+/*
+ * Copyright © 2016 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_OT_POST_TABLE_HH
+#define HB_OT_POST_TABLE_HH
+
+#include "hb-open-type.hh"
+
+#define HB_STRING_ARRAY_NAME format1_names
+#define HB_STRING_ARRAY_LIST "hb-ot-post-macroman.hh"
+#include "hb-string-array.hh"
+#undef HB_STRING_ARRAY_LIST
+#undef HB_STRING_ARRAY_NAME
+
+/*
+ * post -- PostScript
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/post
+ */
+#define HB_OT_TAG_post HB_TAG('p','o','s','t')
+
+
+namespace OT {
+
+
+struct postV2Tail
+{
+ friend struct post;
+
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (glyphNameIndex.sanitize (c));
+ }
+
+ protected:
+ ArrayOf<HBUINT16> glyphNameIndex; /* This is not an offset, but is the
+ * ordinal number of the glyph in 'post'
+ * string tables. */
+/*UnsizedArrayOf<HBUINT8>
+ namesX;*/ /* Glyph names with length bytes [variable]
+ * (a Pascal string). */
+
+ public:
+ DEFINE_SIZE_ARRAY (2, glyphNameIndex);
+};
+
+struct post
+{
+ static constexpr hb_tag_t tableTag = HB_OT_TAG_post;
+
+ void serialize (hb_serialize_context_t *c) const
+ {
+ post *post_prime = c->allocate_min<post> ();
+ if (unlikely (!post_prime)) return;
+
+ memcpy (post_prime, this, post::min_size);
+ post_prime->version.major = 3; // Version 3 does not have any glyph names.
+ }
+
+ bool subset (hb_subset_context_t *c) const
+ {
+ TRACE_SUBSET (this);
+ post *post_prime = c->serializer->start_embed<post> ();
+ if (unlikely (!post_prime)) return_trace (false);
+
+ serialize (c->serializer);
+ if (c->serializer->in_error () || c->serializer->ran_out_of_room) return_trace (false);
+
+ return_trace (true);
+ }
+
+ struct accelerator_t
+ {
+ void init (hb_face_t *face)
+ {
+ index_to_offset.init ();
+
+ table = hb_sanitize_context_t ().reference_table<post> (face);
+ unsigned int table_length = table.get_length ();
+
+ version = table->version.to_int ();
+ if (version != 0x00020000) return;
+
+ const postV2Tail &v2 = table->v2X;
+
+ glyphNameIndex = &v2.glyphNameIndex;
+ pool = &StructAfter<uint8_t> (v2.glyphNameIndex);
+
+ const uint8_t *end = (const uint8_t *) (const void *) table + table_length;
+ for (const uint8_t *data = pool;
+ index_to_offset.length < 65535 && data < end && data + *data < end;
+ data += 1 + *data)
+ index_to_offset.push (data - pool);
+ }
+ void fini ()
+ {
+ index_to_offset.fini ();
+ free (gids_sorted_by_name.get ());
+ table.destroy ();
+ }
+
+ bool get_glyph_name (hb_codepoint_t glyph,
+ char *buf, unsigned int buf_len) const
+ {
+ hb_bytes_t s = find_glyph_name (glyph);
+ if (!s.length) return false;
+ if (!buf_len) return true;
+ unsigned int len = hb_min (buf_len - 1, s.length);
+ strncpy (buf, s.arrayZ, len);
+ buf[len] = '\0';
+ return true;
+ }
+
+ bool get_glyph_from_name (const char *name, int len,
+ hb_codepoint_t *glyph) const
+ {
+ unsigned int count = get_glyph_count ();
+ if (unlikely (!count)) return false;
+
+ if (len < 0) len = strlen (name);
+
+ if (unlikely (!len)) return false;
+
+ retry:
+ uint16_t *gids = gids_sorted_by_name.get ();
+
+ if (unlikely (!gids))
+ {
+ gids = (uint16_t *) malloc (count * sizeof (gids[0]));
+ if (unlikely (!gids))
+ return false; /* Anything better?! */
+
+ for (unsigned int i = 0; i < count; i++)
+ gids[i] = i;
+ hb_qsort (gids, count, sizeof (gids[0]), cmp_gids, (void *) this);
+
+ if (unlikely (!gids_sorted_by_name.cmpexch (nullptr, gids)))
+ {
+ free (gids);
+ goto retry;
+ }
+ }
+
+ hb_bytes_t st (name, len);
+ auto* gid = hb_bsearch (st, gids, count, sizeof (gids[0]), cmp_key, (void *) this);
+ if (gid)
+ {
+ *glyph = *gid;
+ return true;
+ }
+
+ return false;
+ }
+
+ hb_blob_ptr_t<post> table;
+
+ protected:
+
+ unsigned int get_glyph_count () const
+ {
+ if (version == 0x00010000)
+ return format1_names_length;
+
+ if (version == 0x00020000)
+ return glyphNameIndex->len;
+
+ return 0;
+ }
+
+ static int cmp_gids (const void *pa, const void *pb, void *arg)
+ {
+ const accelerator_t *thiz = (const accelerator_t *) arg;
+ uint16_t a = * (const uint16_t *) pa;
+ uint16_t b = * (const uint16_t *) pb;
+ return thiz->find_glyph_name (b).cmp (thiz->find_glyph_name (a));
+ }
+
+ static int cmp_key (const void *pk, const void *po, void *arg)
+ {
+ const accelerator_t *thiz = (const accelerator_t *) arg;
+ const hb_bytes_t *key = (const hb_bytes_t *) pk;
+ uint16_t o = * (const uint16_t *) po;
+ return thiz->find_glyph_name (o).cmp (*key);
+ }
+
+ hb_bytes_t find_glyph_name (hb_codepoint_t glyph) const
+ {
+ if (version == 0x00010000)
+ {
+ if (glyph >= format1_names_length)
+ return hb_bytes_t ();
+
+ return format1_names (glyph);
+ }
+
+ if (version != 0x00020000 || glyph >= glyphNameIndex->len)
+ return hb_bytes_t ();
+
+ unsigned int index = glyphNameIndex->arrayZ[glyph];
+ if (index < format1_names_length)
+ return format1_names (index);
+ index -= format1_names_length;
+
+ if (index >= index_to_offset.length)
+ return hb_bytes_t ();
+ unsigned int offset = index_to_offset[index];
+
+ const uint8_t *data = pool + offset;
+ unsigned int name_length = *data;
+ data++;
+
+ return hb_bytes_t ((const char *) data, name_length);
+ }
+
+ private:
+ uint32_t version;
+ const ArrayOf<HBUINT16> *glyphNameIndex;
+ hb_vector_t<uint32_t> index_to_offset;
+ const uint8_t *pool;
+ hb_atomic_ptr_t<uint16_t *> gids_sorted_by_name;
+ };
+
+ bool has_data () const { return version.to_int (); }
+
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (likely (c->check_struct (this) &&
+ (version.to_int () == 0x00010000 ||
+ (version.to_int () == 0x00020000 && v2X.sanitize (c)) ||
+ version.to_int () == 0x00030000)));
+ }
+
+ public:
+ FixedVersion<>version; /* 0x00010000 for version 1.0
+ * 0x00020000 for version 2.0
+ * 0x00025000 for version 2.5 (deprecated)
+ * 0x00030000 for version 3.0 */
+ HBFixed italicAngle; /* Italic angle in counter-clockwise degrees
+ * from the vertical. Zero for upright text,
+ * negative for text that leans to the right
+ * (forward). */
+ FWORD underlinePosition; /* This is the suggested distance of the top
+ * of the underline from the baseline
+ * (negative values indicate below baseline).
+ * The PostScript definition of this FontInfo
+ * dictionary key (the y coordinate of the
+ * center of the stroke) is not used for
+ * historical reasons. The value of the
+ * PostScript key may be calculated by
+ * subtracting half the underlineThickness
+ * from the value of this field. */
+ FWORD underlineThickness; /* Suggested values for the underline
+ thickness. */
+ HBUINT32 isFixedPitch; /* Set to 0 if the font is proportionally
+ * spaced, non-zero if the font is not
+ * proportionally spaced (i.e. monospaced). */
+ HBUINT32 minMemType42; /* Minimum memory usage when an OpenType font
+ * is downloaded. */
+ HBUINT32 maxMemType42; /* Maximum memory usage when an OpenType font
+ * is downloaded. */
+ HBUINT32 minMemType1; /* Minimum memory usage when an OpenType font
+ * is downloaded as a Type 1 font. */
+ HBUINT32 maxMemType1; /* Maximum memory usage when an OpenType font
+ * is downloaded as a Type 1 font. */
+ postV2Tail v2X;
+ DEFINE_SIZE_MIN (32);
+};
+
+struct post_accelerator_t : post::accelerator_t {};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_POST_TABLE_HH */
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