1// SPDX-License-Identifier: MIT OR MPL-2.0 OR LGPL-2.1-or-later OR GPL-2.0-or-later
2// Copyright 2013, SIL International, All rights reserved.
3
4#pragma once
5
6// numbers are explicitly assigned for future proofing
7
8namespace graphite2
9{
10
11class Error
12{
13public:
14 Error() : _e(0) {};
15 operator bool() { return (_e != 0); }
16 int error() { return _e; }
17 void error(int e) { _e = e; }
18 bool test(bool pr, int err) { return (_e = pr ? err : 0); }
19
20private:
21 int _e;
22};
23
24enum errcontext {
25 EC_READGLYPHS = 1, // while reading glyphs
26 EC_READSILF = 2, // in Silf table
27 EC_ASILF = 3, // in Silf %d
28 EC_APASS = 4, // in Silf %d, pass %d
29 EC_PASSCCODE = 5, // in pass constraint code for Silf %d, pass %d
30 EC_ARULE = 6, // in Silf %d, pass %d, rule %d
31 EC_ASTARTS = 7, // in Silf %d, pass %d, start state %d
32 EC_ATRANS = 8, // in Silf %d, pass %d, fsm state %d
33 EC_ARULEMAP = 9 // in Silf %d, pass %d, state %d
34};
35
36enum error {
37 E_OUTOFMEM = 1, // Out of memory
38 E_NOGLYPHS = 2, // There are no glyphs in the font
39 E_BADUPEM = 3, // The units per em for the font is bad (0)
40 E_BADCMAP = 4, // The font does not contain any useful cmaps
41 E_NOSILF = 5, // Missing Silf table
42 E_TOOOLD = 6, // Silf table version is too old
43 E_BADSIZE = 7, // context object has the wrong structural size
44// Silf Subtable Errors take a Silf subtable number * 256 in the context
45 E_BADMAXGLYPH = 8, // Silf max glyph id is too high
46 E_BADNUMJUSTS = 9, // Number of Silf justification blocks is too high
47 E_BADENDJUSTS = 10, // Silf justification blocks take too much of the Silf table space
48 E_BADCRITFEATURES = 11, // Critical features section in a Silf table is too big
49 E_BADSCRIPTTAGS = 12, // Silf script tags area is too big
50 E_BADAPSEUDO = 13, // The pseudo glyph attribute number is too high
51 E_BADABREAK = 14, // The linebreak glyph attribute number is too high
52 E_BADABIDI = 15, // The bidi glyph attribute number is too high
53 E_BADAMIRROR = 16, // The mirrored glyph attribute number is too high
54 E_BADNUMPASSES = 17, // The number of passes is > 128
55 E_BADPASSESSTART = 18, // The Silf table is too small to hold any passes
56 E_BADPASSBOUND = 19, // The positioning pass number is too low or the substitution pass number is too high
57 E_BADPPASS = 20, // The positioning pass number is too high
58 E_BADSPASS = 21, // the substitution pass number is too high
59 E_BADJPASSBOUND = 22, // the justification pass must be higher than the positioning pass
60 E_BADJPASS = 23, // the justification pass is too high
61 E_BADALIG = 24, // the number of initial ligature component glyph attributes is too high
62 E_BADBPASS = 25, // the bidi pass number is specified and is either too high or too low
63 E_BADNUMPSEUDO = 26, // The number of pseudo glyphs is too high
64 E_BADCLASSSIZE = 27, // The size of the classes block is bad
65 E_TOOMANYLINEAR = 28, // The number of linear classes in the silf table is too high
66 E_CLASSESTOOBIG = 29, // There are too many classes for the space allocated in the Silf subtable
67 E_MISALIGNEDCLASSES = 30, // The class offsets in the class table don't line up with the number of classes
68 E_HIGHCLASSOFFSET = 31, // The class offsets point out of the class table
69 E_BADCLASSOFFSET = 32, // A class offset is less than one following it
70 E_BADCLASSLOOKUPINFO = 33, // The search header info for a non-linear class has wrong values in it
71// Pass subtable errors. Context has pass number * 65536
72 E_BADPASSSTART = 34, // The start offset for a particular pass is bad
73 E_BADPASSEND = 35, // The end offset for a particular pass is bad
74 E_BADPASSLENGTH = 36, // The length of the pass is too small
75 E_BADNUMTRANS = 37, // The number of transition states in the fsm is bad
76 E_BADNUMSUCCESS = 38, // The number of success states in the fsm is bad
77 E_BADNUMSTATES = 39, // The number of states in the fsm is bad
78 E_NORANGES = 40, // There are no columns in the fsm
79 E_BADRULEMAPLEN = 41, // The size of the success state to rule mapping is bad
80 E_BADCTXTLENBOUNDS = 42, // The precontext maximum is greater than its minimum
81 E_BADCTXTLENS = 43, // The lists of rule lengths or pre context lengths is bad
82 E_BADPASSCCODEPTR = 44, // The pass constraint code position does not align with where the forward reference says it should be
83 E_BADRULECCODEPTR = 45, // The rule constraint code position does not align with where the forward reference says it should be
84 E_BADCCODELEN = 46, // Bad rule/pass constraint code length
85 E_BADACTIONCODEPTR = 47, // The action code position does not align with where the forward reference says it should be
86 E_MUTABLECCODE = 48, // Constraint code edits slots. It shouldn't.
87 E_BADSTATE = 49, // Bad state transition referencing an illegal state
88 E_BADRULEMAPPING = 50, // The structure of the rule mapping is bad
89 E_BADRANGE = 51, // Bad column range structure including a glyph in more than one column
90 E_BADRULENUM = 52, // A reference to a rule is out of range (too high)
91 E_BADACOLLISION = 53, // Bad Silf table collision attribute number (too high)
92 E_BADEMPTYPASS = 54, // Can't have empty passes (no rules) except for collision passes
93 E_BADSILFVERSION = 55, // The Silf table has a bad version (probably too high)
94 E_BADCOLLISIONPASS = 56, // Collision flags set on a non positioning pass
95 E_BADNUMCOLUMNS = 57, // Arbitrarily limit number of columns in fsm
96// Code errors
97 E_CODEFAILURE = 60, // Base code error. The following subcodes must align with Machine::Code::status_t in Code.h
98 E_CODEALLOC = 61, // Out of memory
99 E_INVALIDOPCODE = 62, // Invalid op code
100 E_UNIMPOPCODE = 63, // Unimplemented op code encountered
101 E_OUTOFRANGECODE = 64, // Code argument out of range
102 E_BADJUMPCODE = 65, // Code jumps past end of op codes
103 E_CODEBADARGS = 66, // Code arguments exhausted
104 E_CODENORETURN = 67, // Missing return type op code at end of code
105 E_CODENESTEDCTXT = 68, // Nested context encountered in code
106// Compression errors
107 E_BADSCHEME = 69,
108 E_SHRINKERFAILED = 70,
109};
110
111}
112