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
  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,
  82         POINTER,
  83         LONG,
  84         ULONG,
  85         SIZE_T,
  86         SSIZE_T,
  87         OFF_T,
  88   FLOAT,
  89   STRING,
  90   ENUM,
  91   ARRAY,
  92   SEQUENCE,
  93   STRUCT,
  94   UNION,
  95   NONE
  96 } data_type;
  97
  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 labels_description;
 107         int     already_printed;
 108   sequence fields; // for structure
 109   struct _type_descriptor *nested_type; // for array and sequence
 110 } type_descriptor;
 111
 112
 113 /* Fields within types */
 114
 115 typedef struct _field{
 116   char *name;
 117   char *description;
 118   type_descriptor *type;
 119 } field;
 120
 121
 122 /* Events definitions */
 123
 124 typedef struct _event {
 125   char *name;
 126   char *description;
 127   type_descriptor *type;
 128 } event;
 129
 130 typedef struct _facility {
 131   char * name;
 132         char * capname;
 133   char * description;
 134   sequence events;
 135   sequence unnamed_types;
 136   table named_types;
 137 } facility;
 138
 139 int getSize(parse_file *in);
 140 unsigned long getTypeChecksum(unsigned long aCrc, type_descriptor * type);
 141
 142 void parseFacility(parse_file *in, facility * fac);
 143 void parseEvent(parse_file *in, event *ev, sequence * unnamed_types, table * named_types);
 144 void parseTypeDefinition(parse_file *in, sequence * unnamed_types, table * named_types);
 145 type_descriptor *parseType(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types);
 146 void parseFields(parse_file *in, type_descriptor *t, sequence * unnamed_types, table * named_types);
 147 void checkNamedTypesImplemented(table * namedTypes);
 148 type_descriptor * find_named_type(char *name, table * named_types);
 149 void generateChecksum(char * facName, unsigned long * checksum, sequence * events);
 150
 151
 152 /* get attributes */
 153 char * getNameAttribute(parse_file *in);
 154 char * getFormatAttribute(parse_file *in);
 155 int    getSizeAttribute(parse_file *in);
 156 int    getValueAttribute(parse_file *in);
 157 char * getValueStrAttribute(parse_file *in);
 158
 159 char * getDescription(parse_file *in);
 160
 161
 162 static char *intOutputTypes[] = {
 163   "int8_t", "int16_t", "int32_t", "int64_t", "short int", "int", "long int" };
 164
 165 static char *uintOutputTypes[] = {
 166   "uint8_t", "uint16_t", "uint32_t", "uint64_t", "unsigned short int",
 167   "unsigned int", "unsigned long int" };
 168
 169 static char *floatOutputTypes[] = {
 170   "undef", "undef", "float", "double", "undef", "float", "double" };
 171
 172
 173 /* Dynamic memory allocation and freeing */
 174
 175 void * memAlloc(int size);
 176 char *allocAndCopy(char * str);
 177 char *appendString(char *s, char *suffix);
 178 void freeTypes(sequence *t);
 179 void freeType(type_descriptor * td);
 180 void freeEvents(sequence *t);
 181 void freeNamedType(table * t);
 182 void error_callback(parse_file *in, char *msg);
 183
 184
 185 //checksum part
 186 static const unsigned int crctab32[] =
 187 {
 188 #include "crc32.tab"
 189 };
 190
 191 static inline unsigned long
 192 partial_crc32_one(unsigned char c, unsigned long crc)
 193 {
 194   return crctab32[(crc ^ c) & 0xff] ^ (crc >> 8);
 195 }
 196
 197 static inline unsigned long
 198 partial_crc32(const char *s, unsigned long crc)
 199 {
 200   while (*s)
 201     crc = partial_crc32_one(*s++, crc);
 202   return crc;
 203 }
 204
 205 static inline unsigned long
 206 crc32(const char *s)
 207 {
 208   return partial_crc32(s, 0xffffffff) ^ 0xffffffff;
 209 }
 210
 211
 212 #endif // PARSER_H