Open SCAP Library: _sexp-parser.h Source File

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_sexp-parser.h
1 /*
2 * Copyright 2009 Red Hat Inc., Durham, North Carolina.
3 * All Rights Reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * Authors:
20 * "Daniel Kopecek" <dkopecek@redhat.com>
21 */
22 #pragma once
23 #ifndef SEXP_PARSER_H
24 #define SEXP_PARSER_H
25
26 #include <stddef.h>
27 #include <stdint.h>
28 #include "public/sexp-parser.h"
29 #include "_sexp-manip.h"
30 #include "generic/spb.h"
31
32 OSCAP_HIDDEN_START;
33
34 /* Number classes */
35 #define SEXP_NUMCLASS_INV 0
36 #define SEXP_NUMCLASS_INT 1
37 #define SEXP_NUMCLASS_UINT 2
38 #define SEXP_NUMCLASS_FLT 3
39 #define SEXP_NUMCLASS_EXP 4
40 #define SEXP_NUMCLASS_FRA 5
41 #define SEXP_NUMCLASS_PRE 6
42
43 #define SEXP_PFUNC_COUNT 8
44
45 /*
46 * Parser state
47 */
48 struct SEXP_pstate {
49 /*
50 * Input data
51 */
52 spb_t *p_buffer; /* input buffer */
53 spb_size_t p_bufoff; /* start index - everything before this index in the buffer is already parsed */
54 spb_size_t p_explen; /* length of already parsed/checked part of the expression */
55 SEXP_pflags_t p_flags; /* current parser flags */
56 SEXP_t *p_sexp; /* last S-exp object */
57 SEXP_pflags_t p_flags0; /* initial parser flags */
58
59 void *sp_data; /* subparser data */
60 void (*sp_free)(void *); /* function for freeing the subparser data */
61
62 void *sp_shptr[SEXP_PFUNC_COUNT]; /* subparser shared pointer */
63 void (*sp_shfree[SEXP_PFUNC_COUNT])(void *); /* functions for freeing subparser shared pointer */
64
65 uint8_t p_label; /* where to jump if p_explen > 0 */
66
67 uint8_t p_numclass; /* number class */
68 uint8_t p_numbase; /* number base */
69 uint8_t p_numstage; /* number parsing stage */
70
71 /*
72 * Output data
73 */
74 SEXP_lstack_t l_stack; /* output list stack */
75
76 /*
77 * Value cache
78 */
79 uintptr_t v_bool[2]; /* true, false pre-allocated values */
80 uint8_t p_error;
81 };
82
83 struct SEXP_pext_dsc {
84 spb_t *p_buffer;
85 spb_size_t p_bufoff;
86 spb_size_t p_explen;
87 SEXP_pflags_t p_flags;
88 SEXP_t *s_exp;
89 void *sp_data; /* subparser data */
90 void (*sp_free)(void *); /* function for freeing the subparser data */
91 void *sp_shptr[SEXP_PFUNC_COUNT];
92 void (*sp_shfree[SEXP_PFUNC_COUNT])(void *);
93
94 uint8_t p_label;
95 uint8_t p_numclass;
96 uint8_t p_numbase;
97 uint8_t p_numstage;
98
99 uintptr_t *v_bool;
100 };
101
102 #define PEXT_DSC_INITIALIZER { NULL, 0, 0, NULL }
103
104 #define __PARSE_RT int
105 #define __PARSE_PT(n1) struct SEXP_pext_dsc *n1
106
107 typedef __PARSE_RT (SEXP_pfunc_t)(__PARSE_PT());
108
109
110 struct SEXP_psetup {
111 SEXP_format_t p_format; /* expected or required format (depends on p_flags) */
112 SEXP_pflags_t p_flags; /* initial parser flags */
113 SEXP_pfunc_t *p_funcp[SEXP_PFUNC_COUNT];
114 };
115
116 #define SEXP_PFUNC_UL_STRING_SI 0
117 #define SEXP_PFUNC_UL_STRING_DQ 1
118 #define SEXP_PFUNC_UL_STRING_SQ 2
119 #define SEXP_PFUNC_KL_STRING 3
120 #define SEXP_PFUNC_UL_STRING_B64 4
121 #define SEXP_PFUNC_KL_STRING_B64 5
122 #define SEXP_PFUNC_UL_DATATYPE 6
123 #define SEXP_PFUNC_KL_DATATYPE 7
124 #define SEXP_PFUNC_BOOL 8
125
126 __PARSE_RT SEXP_parse_ul_string_si (__PARSE_PT(dsc));
127 __PARSE_RT SEXP_parse_ul_string_dq (__PARSE_PT(dsc));
128 __PARSE_RT SEXP_parse_ul_string_sq (__PARSE_PT(dsc));
129 __PARSE_RT SEXP_parse_kl_string (__PARSE_PT(dsc));
130 __PARSE_RT SEXP_parse_ul_string_b64 (__PARSE_PT(dsc));
131 __PARSE_RT SEXP_parse_kl_string_b64 (__PARSE_PT(dsc));
132 __PARSE_RT SEXP_parse_ul_datatype (__PARSE_PT(dsc));
133 __PARSE_RT SEXP_parse_kl_datatype (__PARSE_PT(dsc));
134 __PARSE_RT SEXP_parse_bool (__PARSE_PT(dsc), bool val);
135
136 #define SEXP_PSLOT_MAX 1024
137
138 #define SEXP_PRET_SUCCESS 0
139 #define SEXP_PRET_EUNFIN 1 /* incomplete token */
140 #define SEXP_PRET_EINVAL 2 /* syntax error, invalid token */
141 #define SEXP_PRET_EUNDEF 255 /* unknown, unexpected error */
142
143 #ifdef __GNUC__
144 # define __predict(expr, v) __builtin_expect (expr, v)
145 #else
146 # define __predict(expr, v) expr
147 #endif /* __GNUC__ */
148
149 /*
150 * TODO: make this function public in the future
151 */
152 int SEXP_psetup_setpfunc(SEXP_psetup_t *psetup, int pfunctype, SEXP_pfunc_t *pfunc);
153
154 OSCAP_HIDDEN_END;
155
156 #endif /* SEXP_PARSER_H */