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author | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2019-02-20 10:13:46 -0300 |
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committer | Roberto Ierusalimschy <roberto@inf.puc-rio.br> | 2019-02-20 10:13:46 -0300 |
commit | e08e5df853560de6482d84066a7accc6a18de545 (patch) | |
tree | ee19686bb35da90709a32ed24bf7855de1a3946a /lptypes.h | |
download | lpeg-e08e5df853560de6482d84066a7accc6a18de545.tar.gz lpeg-e08e5df853560de6482d84066a7accc6a18de545.tar.bz2 lpeg-e08e5df853560de6482d84066a7accc6a18de545.zip |
Fist version of LPeg on GIT
LPeg repository is being moved to git. Past versions won't be moved;
they are still available in RCS.
Diffstat (limited to 'lptypes.h')
-rw-r--r-- | lptypes.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/lptypes.h b/lptypes.h new file mode 100644 index 0000000..5226970 --- /dev/null +++ b/lptypes.h | |||
@@ -0,0 +1,145 @@ | |||
1 | /* | ||
2 | ** $Id: lptypes.h,v 1.17 2017/12/14 16:56:27 roberto Exp $ | ||
3 | ** LPeg - PEG pattern matching for Lua | ||
4 | ** Copyright 2007-2017, Lua.org & PUC-Rio (see 'lpeg.html' for license) | ||
5 | ** written by Roberto Ierusalimschy | ||
6 | */ | ||
7 | |||
8 | #if !defined(lptypes_h) | ||
9 | #define lptypes_h | ||
10 | |||
11 | |||
12 | #include <assert.h> | ||
13 | #include <limits.h> | ||
14 | |||
15 | #include "lua.h" | ||
16 | |||
17 | |||
18 | #define VERSION "1.0.1" | ||
19 | |||
20 | |||
21 | #define PATTERN_T "lpeg-pattern" | ||
22 | #define MAXSTACKIDX "lpeg-maxstack" | ||
23 | |||
24 | |||
25 | /* | ||
26 | ** compatibility with Lua 5.1 | ||
27 | */ | ||
28 | #if (LUA_VERSION_NUM == 501) | ||
29 | |||
30 | #define lp_equal lua_equal | ||
31 | |||
32 | #define lua_getuservalue lua_getfenv | ||
33 | #define lua_setuservalue lua_setfenv | ||
34 | |||
35 | #define lua_rawlen lua_objlen | ||
36 | |||
37 | #define luaL_setfuncs(L,f,n) luaL_register(L,NULL,f) | ||
38 | #define luaL_newlib(L,f) luaL_register(L,"lpeg",f) | ||
39 | |||
40 | #endif | ||
41 | |||
42 | |||
43 | #if !defined(lp_equal) | ||
44 | #define lp_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ) | ||
45 | #endif | ||
46 | |||
47 | |||
48 | /* default maximum size for call/backtrack stack */ | ||
49 | #if !defined(MAXBACK) | ||
50 | #define MAXBACK 400 | ||
51 | #endif | ||
52 | |||
53 | |||
54 | /* maximum number of rules in a grammar (limited by 'unsigned char') */ | ||
55 | #if !defined(MAXRULES) | ||
56 | #define MAXRULES 250 | ||
57 | #endif | ||
58 | |||
59 | |||
60 | |||
61 | /* initial size for capture's list */ | ||
62 | #define INITCAPSIZE 32 | ||
63 | |||
64 | |||
65 | /* index, on Lua stack, for subject */ | ||
66 | #define SUBJIDX 2 | ||
67 | |||
68 | /* number of fixed arguments to 'match' (before capture arguments) */ | ||
69 | #define FIXEDARGS 3 | ||
70 | |||
71 | /* index, on Lua stack, for capture list */ | ||
72 | #define caplistidx(ptop) ((ptop) + 2) | ||
73 | |||
74 | /* index, on Lua stack, for pattern's ktable */ | ||
75 | #define ktableidx(ptop) ((ptop) + 3) | ||
76 | |||
77 | /* index, on Lua stack, for backtracking stack */ | ||
78 | #define stackidx(ptop) ((ptop) + 4) | ||
79 | |||
80 | |||
81 | |||
82 | typedef unsigned char byte; | ||
83 | |||
84 | |||
85 | #define BITSPERCHAR 8 | ||
86 | |||
87 | #define CHARSETSIZE ((UCHAR_MAX/BITSPERCHAR) + 1) | ||
88 | |||
89 | |||
90 | |||
91 | typedef struct Charset { | ||
92 | byte cs[CHARSETSIZE]; | ||
93 | } Charset; | ||
94 | |||
95 | |||
96 | |||
97 | #define loopset(v,b) { int v; for (v = 0; v < CHARSETSIZE; v++) {b;} } | ||
98 | |||
99 | /* access to charset */ | ||
100 | #define treebuffer(t) ((byte *)((t) + 1)) | ||
101 | |||
102 | /* number of slots needed for 'n' bytes */ | ||
103 | #define bytes2slots(n) (((n) - 1) / sizeof(TTree) + 1) | ||
104 | |||
105 | /* set 'b' bit in charset 'cs' */ | ||
106 | #define setchar(cs,b) ((cs)[(b) >> 3] |= (1 << ((b) & 7))) | ||
107 | |||
108 | |||
109 | /* | ||
110 | ** in capture instructions, 'kind' of capture and its offset are | ||
111 | ** packed in field 'aux', 4 bits for each | ||
112 | */ | ||
113 | #define getkind(op) ((op)->i.aux & 0xF) | ||
114 | #define getoff(op) (((op)->i.aux >> 4) & 0xF) | ||
115 | #define joinkindoff(k,o) ((k) | ((o) << 4)) | ||
116 | |||
117 | #define MAXOFF 0xF | ||
118 | #define MAXAUX 0xFF | ||
119 | |||
120 | |||
121 | /* maximum number of bytes to look behind */ | ||
122 | #define MAXBEHIND MAXAUX | ||
123 | |||
124 | |||
125 | /* maximum size (in elements) for a pattern */ | ||
126 | #define MAXPATTSIZE (SHRT_MAX - 10) | ||
127 | |||
128 | |||
129 | /* size (in elements) for an instruction plus extra l bytes */ | ||
130 | #define instsize(l) (((l) + sizeof(Instruction) - 1)/sizeof(Instruction) + 1) | ||
131 | |||
132 | |||
133 | /* size (in elements) for a ISet instruction */ | ||
134 | #define CHARSETINSTSIZE instsize(CHARSETSIZE) | ||
135 | |||
136 | /* size (in elements) for a IFunc instruction */ | ||
137 | #define funcinstsize(p) ((p)->i.aux + 2) | ||
138 | |||
139 | |||
140 | |||
141 | #define testchar(st,c) (((int)(st)[((c) >> 3)] & (1 << ((c) & 7)))) | ||
142 | |||
143 | |||
144 | #endif | ||
145 | |||