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// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
// Copyright 2013, SIL International, All rights reserved.
#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 = pr ? err : 0); }
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 error {
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,
};
}
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