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1 | #ifndef PARSER_H |
2 | #define PARSER_H |
3 | |
4 | /* Extensible array container */ |
5 | |
6 | typedef struct _sequence { |
7 | int size; |
8 | int position; |
9 | void **array; |
10 | } sequence; |
11 | |
12 | void sequence_init(sequence *t); |
13 | void sequence_dispose(sequence *t); |
14 | void sequence_push(sequence *t, void *elem); |
15 | void *sequence_pop(sequence *t); |
16 | |
17 | |
18 | /* Hash table */ |
19 | |
20 | typedef struct _table { |
21 | sequence keys; |
22 | sequence values; |
23 | } table; |
24 | |
25 | void table_init(table *t); |
26 | void table_dispose(table *t); |
27 | void table_insert(table *t, char *key, void *value); |
28 | void *table_find(table *t, char *key); |
29 | void table_insert_int(table *t, int *key, void *value); |
30 | void *table_find_int(table *t, int *key); |
31 | |
32 | |
33 | /* Token types */ |
34 | |
35 | typedef enum _token_type { |
36 | ENDFILE, |
37 | FORWARDSLASH, |
38 | LANGLEBRACKET, |
39 | RANGLEBRACKET, |
40 | EQUAL, |
41 | QUOTEDSTRING, |
42 | NUMBER, |
43 | NAME |
44 | } token_type; |
45 | |
46 | |
47 | /* State associated with a file being parsed */ |
48 | typedef struct _parse_file { |
49 | char *name; |
50 | FILE * fp; |
51 | int lineno; |
52 | char *buffer; |
53 | token_type type; |
54 | int unget; |
55 | void (*error) (struct _parse_file *, char *); |
56 | } parse_file; |
57 | |
58 | void ungetToken(parse_file * in); |
59 | char *getToken(parse_file *in); |
60 | char *getForwardslash(parse_file *in); |
61 | char *getLAnglebracket(parse_file *in); |
62 | char *getRAnglebracket(parse_file *in); |
63 | char *getQuotedString(parse_file *in); |
64 | char *getName(parse_file *in); |
65 | int getNumber(parse_file *in); |
66 | char *getEqual(parse_file *in); |
67 | char seekNextChar(parse_file *in); |
68 | |
69 | void skipComment(parse_file * in); |
70 | void skipEOL(parse_file * in); |
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71 | |
72 | /* Some constants */ |
73 | |
74 | static const int BUFFER_SIZE = 1024; |
75 | |
76 | |
77 | /* Events data types */ |
78 | |
79 | typedef enum _data_type { |
80 | INT, |
81 | UINT, |
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82 | POINTER, |
83 | LONG, |
84 | ULONG, |
85 | SIZE_T, |
86 | SSIZE_T, |
87 | OFF_T, |
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88 | FLOAT, |
89 | STRING, |
90 | ENUM, |
91 | ARRAY, |
92 | SEQUENCE, |
93 | STRUCT, |
94 | UNION, |
95 | NONE |
96 | } data_type; |
97 | |
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98 | /* Event type descriptors */ |
99 | |
100 | typedef struct _type_descriptor { |
101 | char * type_name; //used for named type |
102 | data_type type; |
103 | char *fmt; |
104 | int size; |
105 | sequence labels; // for enumeration |
106 | sequence fields; // for structure |
107 | struct _type_descriptor *nested_type; // for array and sequence |
108 | } type_descriptor; |
109 | |
110 | |
111 | /* Fields within types */ |
112 | |
113 | typedef struct _field{ |
114 | char *name; |
115 | char *description; |
116 | type_descriptor *type; |
117 | } field; |
118 | |
119 | |
120 | /* Events definitions */ |
121 | |
122 | typedef struct _event { |
123 | char *name; |
124 | char *description; |
125 | type_descriptor *type; |
126 | } event; |
127 | |
128 | typedef struct _facility { |
129 | char * name; |
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130 | char * capname; |
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131 | char * description; |
132 | sequence events; |
133 | sequence unnamed_types; |
134 | table named_types; |
135 | } facility; |
136 | |
137 | int getSize(parse_file *in); |
138 | unsigned long getTypeChecksum(unsigned long aCrc, type_descriptor * type); |
139 | |
140 | void parseFacility(parse_file *in, facility * fac); |
141 | void parseEvent(parse_file *in, event *ev, sequence * unnamed_types, table * named_types); |
142 | void parseTypeDefinition(parse_file *in, sequence * unnamed_types, table * named_types); |
143 | type_descriptor *parseType(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types); |
144 | void parseFields(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types); |
145 | void checkNamedTypesImplemented(table * namedTypes); |
146 | type_descriptor * find_named_type(char *name, table * named_types); |
147 | void generateChecksum(char * facName, unsigned long * checksum, sequence * events); |
148 | |
149 | |
150 | /* get attributes */ |
151 | char * getNameAttribute(parse_file *in); |
152 | char * getFormatAttribute(parse_file *in); |
153 | int getSizeAttribute(parse_file *in); |
154 | int getValueAttribute(parse_file *in); |
155 | char * getValueStrAttribute(parse_file *in); |
156 | |
157 | char * getDescription(parse_file *in); |
158 | |
159 | |
160 | static char *intOutputTypes[] = { |
161 | "int8_t", "int16_t", "int32_t", "int64_t", "short int", "int", "long int" }; |
162 | |
163 | static char *uintOutputTypes[] = { |
164 | "uint8_t", "uint16_t", "uint32_t", "uint64_t", "unsigned short int", |
165 | "unsigned int", "unsigned long int" }; |
166 | |
167 | static char *floatOutputTypes[] = { |
168 | "undef", "undef", "float", "double", "undef", "float", "double" }; |
169 | |
170 | |
171 | /* Dynamic memory allocation and freeing */ |
172 | |
173 | void * memAlloc(int size); |
174 | char *allocAndCopy(char * str); |
175 | char *appendString(char *s, char *suffix); |
176 | void freeTypes(sequence *t); |
177 | void freeType(type_descriptor * td); |
178 | void freeEvents(sequence *t); |
179 | void freeNamedType(table * t); |
180 | void error_callback(parse_file *in, char *msg); |
181 | |
182 | |
183 | //checksum part |
184 | static const unsigned int crctab32[] = |
185 | { |
186 | #include "crc32.tab" |
187 | }; |
188 | |
189 | static inline unsigned long |
190 | partial_crc32_one(unsigned char c, unsigned long crc) |
191 | { |
192 | return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8); |
193 | } |
194 | |
195 | static inline unsigned long |
196 | partial_crc32(const char *s, unsigned long crc) |
197 | { |
198 | while (*s) |
199 | crc = partial_crc32_one(*s++, crc); |
200 | return crc; |
201 | } |
202 | |
203 | static inline unsigned long |
204 | crc32(const char *s) |
205 | { |
206 | return partial_crc32(s, 0xffffffff) ^ 0xffffffff; |
207 | } |
208 | |
209 | |
210 | #endif // PARSER_H |