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+/* GRAPHITE2 LICENSING
+
+ Copyright 2013, SIL International
+ All rights reserved.
+
+ This library is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should also have received a copy of the GNU Lesser General Public
+ License along with this library in the file named "LICENSE".
+ If not, write to the Free Software Foundation, 51 Franklin Street,
+ Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
+ internet at http://www.fsf.org/licenses/lgpl.html.
+
+Alternatively, the contents of this file may be used under the terms of the
+Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
+License, as published by the Free Software Foundation, either version 2
+of the License or (at your option) any later version.
+*/
+#pragma once
+
+// numbers are explicitly assigned for future proofing
+
+namespace graphite2
+{
+
+class Error
+{
+public:
+ Error() : _e(0) {};
+ operator bool() { return (_e != 0); }
+ int error() { return _e; }
+ void error(int e) { _e = e; }
+ bool test(bool pr, int err) { return (_e = int(pr) * err); }
+
+private:
+ int _e;
+};
+
+enum errcontext {
+ EC_READGLYPHS = 1, // while reading glyphs
+ EC_READSILF = 2, // in Silf table
+ EC_ASILF = 3, // in Silf %d
+ EC_APASS = 4, // in Silf %d, pass %d
+ EC_PASSCCODE = 5, // in pass constraint code for Silf %d, pass %d
+ EC_ARULE = 6, // in Silf %d, pass %d, rule %d
+ EC_ASTARTS = 7, // in Silf %d, pass %d, start state %d
+ EC_ATRANS = 8, // in Silf %d, pass %d, fsm state %d
+ EC_ARULEMAP = 9 // in Silf %d, pass %d, state %d
+};
+
+enum errors {
+ E_OUTOFMEM = 1, // Out of memory
+ E_NOGLYPHS = 2, // There are no glyphs in the font
+ E_BADUPEM = 3, // The units per em for the font is bad (0)
+ E_BADCMAP = 4, // The font does not contain any useful cmaps
+ E_NOSILF = 5, // Missing Silf table
+ E_TOOOLD = 6, // Silf table version is too old
+ E_BADSIZE = 7, // context object has the wrong structural size
+// Silf Subtable Errors take a Silf subtable number * 256 in the context
+ E_BADMAXGLYPH = 8, // Silf max glyph id is too high
+ E_BADNUMJUSTS = 9, // Number of Silf justification blocks is too high
+ E_BADENDJUSTS = 10, // Silf justification blocks take too much of the Silf table space
+ E_BADCRITFEATURES = 11, // Critical features section in a Silf table is too big
+ E_BADSCRIPTTAGS = 12, // Silf script tags area is too big
+ E_BADAPSEUDO = 13, // The pseudo glyph attribute number is too high
+ E_BADABREAK = 14, // The linebreak glyph attribute number is too high
+ E_BADABIDI = 15, // The bidi glyph attribute number is too high
+ E_BADAMIRROR = 16, // The mirrored glyph attribute number is too high
+ E_BADNUMPASSES = 17, // The number of passes is > 128
+ E_BADPASSESSTART = 18, // The Silf table is too small to hold any passes
+ E_BADPASSBOUND = 19, // The positioning pass number is too low or the substitution pass number is too high
+ E_BADPPASS = 20, // The positioning pass number is too high
+ E_BADSPASS = 21, // the substitution pass number is too high
+ E_BADJPASSBOUND = 22, // the justification pass must be higher than the positioning pass
+ E_BADJPASS = 23, // the justification pass is too high
+ E_BADALIG = 24, // the number of initial ligature component glyph attributes is too high
+ E_BADBPASS = 25, // the bidi pass number is specified and is either too high or too low
+ E_BADNUMPSEUDO = 26, // The number of pseudo glyphs is too high
+ E_BADCLASSSIZE = 27, // The size of the classes block is bad
+ E_TOOMANYLINEAR = 28, // The number of linear classes in the silf table is too high
+ E_CLASSESTOOBIG = 29, // There are too many classes for the space allocated in the Silf subtable
+ E_MISALIGNEDCLASSES = 30, // The class offsets in the class table don't line up with the number of classes
+ E_HIGHCLASSOFFSET = 31, // The class offsets point out of the class table
+ E_BADCLASSOFFSET = 32, // A class offset is less than one following it
+ E_BADCLASSLOOKUPINFO = 33, // The search header info for a non-linear class has wrong values in it
+// Pass subtable errors. Context has pass number * 65536
+ E_BADPASSSTART = 34, // The start offset for a particular pass is bad
+ E_BADPASSEND = 35, // The end offset for a particular pass is bad
+ E_BADPASSLENGTH = 36, // The length of the pass is too small
+ E_BADNUMTRANS = 37, // The number of transition states in the fsm is bad
+ E_BADNUMSUCCESS = 38, // The number of success states in the fsm is bad
+ E_BADNUMSTATES = 39, // The number of states in the fsm is bad
+ E_NORANGES = 40, // There are no columns in the fsm
+ E_BADRULEMAPLEN = 41, // The size of the success state to rule mapping is bad
+ E_BADCTXTLENBOUNDS = 42, // The precontext maximum is greater than its minimum
+ E_BADCTXTLENS = 43, // The lists of rule lengths or pre context lengths is bad
+ E_BADPASSCCODEPTR = 44, // The pass constraint code position does not align with where the forward reference says it should be
+ E_BADRULECCODEPTR = 45, // The rule constraint code position does not align with where the forward reference says it should be
+ E_BADCCODELEN = 46, // Bad rule/pass constraint code length
+ E_BADACTIONCODEPTR = 47, // The action code position does not align with where the forward reference says it should be
+ E_MUTABLECCODE = 48, // Constraint code edits slots. It shouldn't.
+ E_BADSTATE = 49, // Bad state transition referencing an illegal state
+ E_BADRULEMAPPING = 50, // The structure of the rule mapping is bad
+ E_BADRANGE = 51, // Bad column range structure including a glyph in more than one column
+ E_BADRULENUM = 52, // A reference to a rule is out of range (too high)
+ E_BADACOLLISION = 53, // Bad Silf table collision attribute number (too high)
+ E_BADEMPTYPASS = 54, // Can't have empty passes (no rules) except for collision passes
+ E_BADSILFVERSION = 55, // The Silf table has a bad version (probably too high)
+ E_BADCOLLISIONPASS = 56, // Collision flags set on a non positioning pass
+ E_BADNUMCOLUMNS = 57, // Arbitrarily limit number of columns in fsm
+// Code errors
+ E_CODEFAILURE = 60, // Base code error. The following subcodes must align with Machine::Code::status_t in Code.h
+ E_CODEALLOC = 61, // Out of memory
+ E_INVALIDOPCODE = 62, // Invalid op code
+ E_UNIMPOPCODE = 63, // Unimplemented op code encountered
+ E_OUTOFRANGECODE = 64, // Code argument out of range
+ E_BADJUMPCODE = 65, // Code jumps past end of op codes
+ E_CODEBADARGS = 66, // Code arguments exhausted
+ E_CODENORETURN = 67, // Missing return type op code at end of code
+ E_CODENESTEDCTXT = 68, // Nested context encountered in code
+// Compression errors
+ E_BADSCHEME = 69,
+ E_SHRINKERFAILED = 70,
+};
+
+}
+