genevent/parser.h

   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);
  71 int isalpha(char car);
  72 int isalnum(char car);
  73
  74 /* Some constants */
  75
  76 static const int BUFFER_SIZE = 1024;
  77
  78
  79 /* Events data types */
  80
  81 typedef enum _data_type {
  82   INT,
  83   UINT,
  84   FLOAT,
  85   STRING,
  86   ENUM,
  87   ARRAY,
  88   SEQUENCE,
  89   STRUCT,
  90   UNION,
  91   NONE
  92 } data_type;
  93
  94
  95 /* Event type descriptors */
  96
  97 typedef struct _type_descriptor {
  98   char * type_name; //used for named type
  99   data_type type;
 100   char *fmt;
 101   int size;
 102   sequence labels; // for enumeration
 103   sequence fields; // for structure
 104   struct _type_descriptor *nested_type; // for array and sequence
 105 } type_descriptor;
 106
 107
 108 /* Fields within types */
 109
 110 typedef struct _field{
 111   char *name;
 112   char *description;
 113   type_descriptor *type;
 114 } field;
 115
 116
 117 /* Events definitions */
 118
 119 typedef struct _event {
 120   char *name;
 121   char *description;
 122   type_descriptor *type;
 123 } event;
 124
 125 typedef struct _facility {
 126   char * name;
 127   char * description;
 128   sequence events;
 129   sequence unnamed_types;
 130   table named_types;
 131 } facility;
 132
 133 int getSize(parse_file *in);
 134 unsigned long getTypeChecksum(unsigned long aCrc, type_descriptor * type);
 135
 136 void parseFacility(parse_file *in, facility * fac);
 137 void parseEvent(parse_file *in, event *ev, sequence * unnamed_types, table * named_types);
 138 void parseTypeDefinition(parse_file *in, sequence * unnamed_types, table * named_types);
 139 type_descriptor *parseType(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types);
 140 void parseFields(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types);
 141 void checkNamedTypesImplemented(table * namedTypes);
 142 type_descriptor * find_named_type(char *name, table * named_types);
 143 void generateChecksum(char * facName, unsigned long * checksum, sequence * events);
 144
 145
 146 /* get attributes */
 147 char * getNameAttribute(parse_file *in);
 148 char * getFormatAttribute(parse_file *in);
 149 int    getSizeAttribute(parse_file *in);
 150 int    getValueAttribute(parse_file *in);
 151 char * getValueStrAttribute(parse_file *in);
 152
 153 char * getDescription(parse_file *in);
 154
 155
 156 static char *intOutputTypes[] = {
 157   "int8_t", "int16_t", "int32_t", "int64_t", "short int", "int", "long int" };
 158
 159 static char *uintOutputTypes[] = {
 160   "uint8_t", "uint16_t", "uint32_t", "uint64_t", "unsigned short int",
 161   "unsigned int", "unsigned long int" };
 162
 163 static char *floatOutputTypes[] = {
 164   "undef", "undef", "float", "double", "undef", "float", "double" };
 165
 166
 167 /* Dynamic memory allocation and freeing */
 168
 169 void * memAlloc(int size);
 170 char *allocAndCopy(char * str);
 171 char *appendString(char *s, char *suffix);
 172 void freeTypes(sequence *t);
 173 void freeType(type_descriptor * td);
 174 void freeEvents(sequence *t);
 175 void freeNamedType(table * t);
 176 void error_callback(parse_file *in, char *msg);
 177
 178
 179 //checksum part
 180 static const unsigned int crctab32[] =
 181 {
 182 #include "crc32.tab"
 183 };
 184
 185 static inline unsigned long
 186 partial_crc32_one(unsigned char c, unsigned long crc)
 187 {
 188   return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
 189 }
 190
 191 static inline unsigned long
 192 partial_crc32(const char *s, unsigned long crc)
 193 {
 194   while (*s)
 195     crc = partial_crc32_one(*s++, crc);
 196   return crc;
 197 }
 198
 199 static inline unsigned long
 200 crc32(const char *s)
 201 {
 202   return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
 203 }
 204
 205
 206 #endif // PARSER_H