Update freetype sources (2.6.2) in third party.

third_party/freetype2/src/src/sfnt/ttpost.c

Index: third_party/freetype2/src/src/sfnt/ttpost.c
diff --git a/third_party/freetype2/src/src/sfnt/ttpost.c b/third_party/freetype2/src/src/sfnt/ttpost.c
new file mode 100644
index 0000000000000000000000000000000000000000..8d29d1e9f6d34c334b17ca8b3abd1d52ad6e618c
--- /dev/null
+++ b/third_party/freetype2/src/src/sfnt/ttpost.c
@@ -0,0 +1,563 @@
+/***************************************************************************/
+/*                                                                         */
+/*  ttpost.c                                                               */
+/*                                                                         */
+/*    Postcript name table processing for TrueType and OpenType fonts      */
+/*    (body).                                                              */
+/*                                                                         */
+/*  Copyright 1996-2015 by                                                 */
+/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
+/*                                                                         */
+/*  This file is part of the FreeType project, and may only be used,       */
+/*  modified, and distributed under the terms of the FreeType project      */
+/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
+/*  this file you indicate that you have read the license and              */
+/*  understand and accept it fully.                                        */
+/*                                                                         */
+/***************************************************************************/
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* The post table is not completely loaded by the core engine.  This     */
+  /* file loads the missing PS glyph names and implements an API to access */
+  /* them.                                                                 */
+  /*                                                                       */
+  /*************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_STREAM_H
+#include FT_TRUETYPE_TAGS_H
+#include "ttpost.h"
+
+#include "sferrors.h"
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
+  /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
+  /* messages during execution.                                            */
+  /*                                                                       */
+#undef  FT_COMPONENT
+#define FT_COMPONENT  trace_ttpost
+
+
+  /* If this configuration macro is defined, we rely on the `PSNames' */
+  /* module to grab the glyph names.                                  */
+
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+
+
+#include FT_SERVICE_POSTSCRIPT_CMAPS_H
+
+#define MAC_NAME( x )  (FT_String*)psnames->macintosh_name( (FT_UInt)(x) )
+
+
+#else /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
+
+
+   /* Otherwise, we ignore the `PSNames' module, and provide our own  */
+   /* table of Mac names.  Thus, it is possible to build a version of */
+   /* FreeType without the Type 1 driver & PSNames module.            */
+
+#define MAC_NAME( x )  (FT_String*)tt_post_default_names[x]
+
+  /* the 258 default Mac PS glyph names; see file `tools/glnames.py' */
+
+  static const FT_String* const  tt_post_default_names[258] =
+  {
+    /*   0 */
+    ".notdef", ".null", "nonmarkingreturn", "space", "exclam",
+    "quotedbl", "numbersign", "dollar", "percent", "ampersand",
+    /*  10 */
+    "quotesingle", "parenleft", "parenright", "asterisk", "plus",
+    "comma", "hyphen", "period", "slash", "zero",
+    /*  20 */
+    "one", "two", "three", "four", "five",
+    "six", "seven", "eight", "nine", "colon",
+    /*  30 */
+    "semicolon", "less", "equal", "greater", "question",
+    "at", "A", "B", "C", "D",
+    /*  40 */
+    "E", "F", "G", "H", "I",
+    "J", "K", "L", "M", "N",
+    /*  50 */
+    "O", "P", "Q", "R", "S",
+    "T", "U", "V", "W", "X",
+    /*  60 */
+    "Y", "Z", "bracketleft", "backslash", "bracketright",
+    "asciicircum", "underscore", "grave", "a", "b",
+    /*  70 */
+    "c", "d", "e", "f", "g",
+    "h", "i", "j", "k", "l",
+    /*  80 */
+    "m", "n", "o", "p", "q",
+    "r", "s", "t", "u", "v",
+    /*  90 */
+    "w", "x", "y", "z", "braceleft",
+    "bar", "braceright", "asciitilde", "Adieresis", "Aring",
+    /* 100 */
+    "Ccedilla", "Eacute", "Ntilde", "Odieresis", "Udieresis",
+    "aacute", "agrave", "acircumflex", "adieresis", "atilde",
+    /* 110 */
+    "aring", "ccedilla", "eacute", "egrave", "ecircumflex",
+    "edieresis", "iacute", "igrave", "icircumflex", "idieresis",
+    /* 120 */
+    "ntilde", "oacute", "ograve", "ocircumflex", "odieresis",
+    "otilde", "uacute", "ugrave", "ucircumflex", "udieresis",
+    /* 130 */
+    "dagger", "degree", "cent", "sterling", "section",
+    "bullet", "paragraph", "germandbls", "registered", "copyright",
+    /* 140 */
+    "trademark", "acute", "dieresis", "notequal", "AE",
+    "Oslash", "infinity", "plusminus", "lessequal", "greaterequal",
+    /* 150 */
+    "yen", "mu", "partialdiff", "summation", "product",
+    "pi", "integral", "ordfeminine", "ordmasculine", "Omega",
+    /* 160 */
+    "ae", "oslash", "questiondown", "exclamdown", "logicalnot",
+    "radical", "florin", "approxequal", "Delta", "guillemotleft",
+    /* 170 */
+    "guillemotright", "ellipsis", "nonbreakingspace", "Agrave", "Atilde",
+    "Otilde", "OE", "oe", "endash", "emdash",
+    /* 180 */
+    "quotedblleft", "quotedblright", "quoteleft", "quoteright", "divide",
+    "lozenge", "ydieresis", "Ydieresis", "fraction", "currency",
+    /* 190 */
+    "guilsinglleft", "guilsinglright", "fi", "fl", "daggerdbl",
+    "periodcentered", "quotesinglbase", "quotedblbase", "perthousand", "Acircumflex",
+    /* 200 */
+    "Ecircumflex", "Aacute", "Edieresis", "Egrave", "Iacute",
+    "Icircumflex", "Idieresis", "Igrave", "Oacute", "Ocircumflex",
+    /* 210 */
+    "apple", "Ograve", "Uacute", "Ucircumflex", "Ugrave",
+    "dotlessi", "circumflex", "tilde", "macron", "breve",
+    /* 220 */
+    "dotaccent", "ring", "cedilla", "hungarumlaut", "ogonek",
+    "caron", "Lslash", "lslash", "Scaron", "scaron",
+    /* 230 */
+    "Zcaron", "zcaron", "brokenbar", "Eth", "eth",
+    "Yacute", "yacute", "Thorn", "thorn", "minus",
+    /* 240 */
+    "multiply", "onesuperior", "twosuperior", "threesuperior", "onehalf",
+    "onequarter", "threequarters", "franc", "Gbreve", "gbreve",
+    /* 250 */
+    "Idotaccent", "Scedilla", "scedilla", "Cacute", "cacute",
+    "Ccaron", "ccaron", "dcroat",
+  };
+
+
+#endif /* FT_CONFIG_OPTION_POSTSCRIPT_NAMES */
+
+
+  static FT_Error
+  load_format_20( TT_Face    face,
+                  FT_Stream  stream,
+                  FT_ULong   post_limit )
+  {
+    FT_Memory   memory = stream->memory;
+    FT_Error    error;
+
+    FT_Int      num_glyphs;
+    FT_UShort   num_names;
+
+    FT_UShort*  glyph_indices = NULL;
+    FT_Char**   name_strings  = NULL;
+
+
+    if ( FT_READ_USHORT( num_glyphs ) )
+      goto Exit;
+
+    /* UNDOCUMENTED!  The number of glyphs in this table can be smaller */
+    /* than the value in the maxp table (cf. cyberbit.ttf).             */
+
+    /* There already exist fonts which have more than 32768 glyph names */
+    /* in this table, so the test for this threshold has been dropped.  */
+
+    if ( num_glyphs > face->max_profile.numGlyphs )
+    {
+      error = FT_THROW( Invalid_File_Format );
+      goto Exit;
+    }
+
+    /* load the indices */
+    {
+      FT_Int  n;
+
+
+      if ( FT_NEW_ARRAY ( glyph_indices, num_glyphs ) ||
+           FT_FRAME_ENTER( num_glyphs * 2L )          )
+        goto Fail;
+
+      for ( n = 0; n < num_glyphs; n++ )
+        glyph_indices[n] = FT_GET_USHORT();
+
+      FT_FRAME_EXIT();
+    }
+
+    /* compute number of names stored in table */
+    {
+      FT_Int  n;
+
+
+      num_names = 0;
+
+      for ( n = 0; n < num_glyphs; n++ )
+      {
+        FT_Int  idx;
+
+
+        idx = glyph_indices[n];
+        if ( idx >= 258 )
+        {
+          idx -= 257;
+          if ( idx > num_names )
+            num_names = (FT_UShort)idx;
+        }
+      }
+    }
+
+    /* now load the name strings */
+    {
+      FT_UShort  n;
+
+
+      if ( FT_NEW_ARRAY( name_strings, num_names ) )
+        goto Fail;
+
+      for ( n = 0; n < num_names; n++ )
+      {
+        FT_UInt  len;
+
+
+        if ( FT_STREAM_POS() >= post_limit )
+          break;
+        else
+        {
+          FT_TRACE6(( "load_format_20: %d byte left in post table\n",
+                      post_limit - FT_STREAM_POS() ));
+
+          if ( FT_READ_BYTE( len ) )
+            goto Fail1;
+        }
+
+        if ( len > post_limit                   ||
+             FT_STREAM_POS() > post_limit - len )
+        {
+          FT_Int  d = (FT_Int)post_limit - (FT_Int)FT_STREAM_POS();
+
+
+          FT_ERROR(( "load_format_20:"
+                     " exceeding string length (%d),"
+                     " truncating at end of post table (%d byte left)\n",
+                     len, d ));
+          len = (FT_UInt)FT_MAX( 0, d );
+        }
+
+        if ( FT_NEW_ARRAY( name_strings[n], len + 1 ) ||
+             FT_STREAM_READ( name_strings[n], len   ) )
+          goto Fail1;
+
+        name_strings[n][len] = '\0';
+      }
+
+      if ( n < num_names )
+      {
+        FT_ERROR(( "load_format_20:"
+                   " all entries in post table are already parsed,"
+                   " using NULL names for gid %d - %d\n",
+                    n, num_names - 1 ));
+        for ( ; n < num_names; n++ )
+          if ( FT_NEW_ARRAY( name_strings[n], 1 ) )
+            goto Fail1;
+          else
+            name_strings[n][0] = '\0';
+      }
+    }
+
+    /* all right, set table fields and exit successfully */
+    {
+      TT_Post_20  table = &face->postscript_names.names.format_20;
+
+
+      table->num_glyphs    = (FT_UShort)num_glyphs;
+      table->num_names     = (FT_UShort)num_names;
+      table->glyph_indices = glyph_indices;
+      table->glyph_names   = name_strings;
+    }
+    return FT_Err_Ok;
+
+  Fail1:
+    {
+      FT_UShort  n;
+
+
+      for ( n = 0; n < num_names; n++ )
+        FT_FREE( name_strings[n] );
+    }
+
+  Fail:
+    FT_FREE( name_strings );
+    FT_FREE( glyph_indices );
+
+  Exit:
+    return error;
+  }
+
+
+  static FT_Error
+  load_format_25( TT_Face    face,
+                  FT_Stream  stream,
+                  FT_ULong   post_limit )
+  {
+    FT_Memory  memory = stream->memory;
+    FT_Error   error;
+
+    FT_Int     num_glyphs;
+    FT_Char*   offset_table = NULL;
+
+    FT_UNUSED( post_limit );
+
+
+    /* UNDOCUMENTED!  This value appears only in the Apple TT specs. */
+    if ( FT_READ_USHORT( num_glyphs ) )
+      goto Exit;
+
+    /* check the number of glyphs */
+    if ( num_glyphs > face->max_profile.numGlyphs || num_glyphs > 258 )
+    {
+      error = FT_THROW( Invalid_File_Format );
+      goto Exit;
+    }
+
+    if ( FT_NEW_ARRAY( offset_table, num_glyphs )   ||
+         FT_STREAM_READ( offset_table, num_glyphs ) )
+      goto Fail;
+
+    /* now check the offset table */
+    {
+      FT_Int  n;
+
+
+      for ( n = 0; n < num_glyphs; n++ )
+      {
+        FT_Long  idx = (FT_Long)n + offset_table[n];
+
+
+        if ( idx < 0 || idx > num_glyphs )
+        {
+          error = FT_THROW( Invalid_File_Format );
+          goto Fail;
+        }
+      }
+    }
+
+    /* OK, set table fields and exit successfully */
+    {
+      TT_Post_25  table = &face->postscript_names.names.format_25;
+
+
+      table->num_glyphs = (FT_UShort)num_glyphs;
+      table->offsets    = offset_table;
+    }
+
+    return FT_Err_Ok;
+
+  Fail:
+    FT_FREE( offset_table );
+
+  Exit:
+    return error;
+  }
+
+
+  static FT_Error
+  load_post_names( TT_Face  face )
+  {
+    FT_Stream  stream;
+    FT_Error   error;
+    FT_Fixed   format;
+    FT_ULong   post_len;
+    FT_ULong   post_limit;
+
+
+    /* get a stream for the face's resource */
+    stream = face->root.stream;
+
+    /* seek to the beginning of the PS names table */
+    error = face->goto_table( face, TTAG_post, stream, &post_len );
+    if ( error )
+      goto Exit;
+
+    post_limit = FT_STREAM_POS() + post_len;
+
+    format = face->postscript.FormatType;
+
+    /* go to beginning of subtable */
+    if ( FT_STREAM_SKIP( 32 ) )
+      goto Exit;
+
+    /* now read postscript table */
+    if ( format == 0x00020000L )
+      error = load_format_20( face, stream, post_limit );
+    else if ( format == 0x00028000L )
+      error = load_format_25( face, stream, post_limit );
+    else
+      error = FT_THROW( Invalid_File_Format );
+
+    face->postscript_names.loaded = 1;
+
+  Exit:
+    return error;
+  }
+
+
+  FT_LOCAL_DEF( void )
+  tt_face_free_ps_names( TT_Face  face )
+  {
+    FT_Memory      memory = face->root.memory;
+    TT_Post_Names  names  = &face->postscript_names;
+    FT_Fixed       format;
+
+
+    if ( names->loaded )
+    {
+      format = face->postscript.FormatType;
+
+      if ( format == 0x00020000L )
+      {
+        TT_Post_20  table = &names->names.format_20;
+        FT_UShort   n;
+
+
+        FT_FREE( table->glyph_indices );
+        table->num_glyphs = 0;
+
+        for ( n = 0; n < table->num_names; n++ )
+          FT_FREE( table->glyph_names[n] );
+
+        FT_FREE( table->glyph_names );
+        table->num_names = 0;
+      }
+      else if ( format == 0x00028000L )
+      {
+        TT_Post_25  table = &names->names.format_25;
+
+
+        FT_FREE( table->offsets );
+        table->num_glyphs = 0;
+      }
+    }
+    names->loaded = 0;
+  }
+
+
+  /*************************************************************************/
+  /*                                                                       */
+  /* <Function>                                                            */
+  /*    tt_face_get_ps_name                                                */
+  /*                                                                       */
+  /* <Description>                                                         */
+  /*    Get the PostScript glyph name of a glyph.                          */
+  /*                                                                       */
+  /* <Input>                                                               */
+  /*    face   :: A handle to the parent face.                             */
+  /*                                                                       */
+  /*    idx    :: The glyph index.                                         */
+  /*                                                                       */
+  /* <InOut>                                                               */
+  /*    PSname :: The address of a string pointer.  Will be NULL in case   */
+  /*              of error, otherwise it is a pointer to the glyph name.   */
+  /*                                                                       */
+  /*              You must not modify the returned string!                 */
+  /*                                                                       */
+  /* <Output>                                                              */
+  /*    FreeType error code.  0 means success.                             */
+  /*                                                                       */
+  FT_LOCAL_DEF( FT_Error )
+  tt_face_get_ps_name( TT_Face      face,
+                       FT_UInt      idx,
+                       FT_String**  PSname )
+  {
+    FT_Error       error;
+    TT_Post_Names  names;
+    FT_Fixed       format;
+
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+    FT_Service_PsCMaps  psnames;
+#endif
+
+
+    if ( !face )
+      return FT_THROW( Invalid_Face_Handle );
+
+    if ( idx >= (FT_UInt)face->max_profile.numGlyphs )
+      return FT_THROW( Invalid_Glyph_Index );
+
+#ifdef FT_CONFIG_OPTION_POSTSCRIPT_NAMES
+    psnames = (FT_Service_PsCMaps)face->psnames;
+    if ( !psnames )
+      return FT_THROW( Unimplemented_Feature );
+#endif
+
+    names = &face->postscript_names;
+
+    /* `.notdef' by default */
+    *PSname = MAC_NAME( 0 );
+
+    format = face->postscript.FormatType;
+
+    if ( format == 0x00010000L )
+    {
+      if ( idx < 258 )                    /* paranoid checking */
+        *PSname = MAC_NAME( idx );
+    }
+    else if ( format == 0x00020000L )
+    {
+      TT_Post_20  table = &names->names.format_20;
+
+
+      if ( !names->loaded )
+      {
+        error = load_post_names( face );
+        if ( error )
+          goto End;
+      }
+
+      if ( idx < (FT_UInt)table->num_glyphs )
+      {
+        FT_UShort  name_index = table->glyph_indices[idx];
+
+
+        if ( name_index < 258 )
+          *PSname = MAC_NAME( name_index );
+        else
+          *PSname = (FT_String*)table->glyph_names[name_index - 258];
+      }
+    }
+    else if ( format == 0x00028000L )
+    {
+      TT_Post_25  table = &names->names.format_25;
+
+
+      if ( !names->loaded )
+      {
+        error = load_post_names( face );
+        if ( error )
+          goto End;
+      }
+
+      if ( idx < (FT_UInt)table->num_glyphs )    /* paranoid checking */
+        *PSname = MAC_NAME( (FT_Int)idx + table->offsets[idx] );
+    }
+
+    /* nothing to do for format == 0x00030000L */
+
+  End:
+    return FT_Err_Ok;
+  }
+
+
+/* END */