/* SDB - definition file */ #include "ctype.h" /*dns*/ /* compiler specific stuff (dns) */ #define Lattice /* useful definitions */ #define TRUE 1 #define FALSE 0 #ifndef NULL #define NULL 0 #endif /* Character definitions (dns) */ #define BS 0x8 /*dns*/ #define CR 0xD /*dns*/ #define FF 0xC /*dns*/ #define ESC 0x1B /*dns*/ /* program limits */ #define LINEMAX 132 /* maximum input line length */ #define TABLEMAX 132 /* maximum table output line */ #define KEYWORDMAX 10 /* maximum keyword length */ #define NUMBERMAX 20 /* maximum number length */ #define STRINGMAX 132 /* maximum string length */ #define CODEMAX 100 /* maximum length of code array */ #define STACKMAX 20 /* maximum interpreter stack size */ /* token definitions */ #define EOS 0 #define LSS -1 #define LEQ -2 #define EQL -3 #define NEQ -4 #define GEQ -5 #define GTR -6 #define SELECT -7 #define FROM -8 #define WHERE -9 #define CREATE -10 #define DELETE -11 #define INSERT -12 #define EXIT -13 #define CHAR -14 #define NUM -15 #define ID -16 #define STRING -17 #define NUMBER -18 #define UPDATE -19 #define PRINT -20 #define IMPORT -21 #define EXPORT -22 #define INTO -23 #define HELP -24 #define COMPRESS -25 #define EXTRACT -26 #define DEFINE -27 #define SHOW -28 #define USING -29 #define SORT -30 #define BY -31 #define ASCENDING -32 #define DESCENDING -33 #define SET -34 /* operand types */ #define LITERAL 1 #define ATTR 2 #define TEMP 3 /* attribute data types */ #define TCHAR 1 #define TNUM 2 /* tuple status codes */ #define UNUSED 0 #define ACTIVE 1 #define DELETED 2 /* relation header page format definitions */ #define RNSIZE 10 /* size of a relation name */ #define HSIZE 16 /* size of a relation entry */ #define ASIZE 16 /* size of a attribute entry */ #define ANSIZE 10 /* size of a attribute name */ #define NATTRS 31 /* number of attributes in header block */ /* error code definitions */ #define END 0 /* end of retrieval set */ #define INSMEM 1 /* insufficient memory */ #define RELFNF 2 /* relation file not found */ #define BADHDR 3 /* bad relation file header */ #define TUPINP 4 /* tuple input error */ #define TUPOUT 5 /* tuple output error */ #define RELFUL 6 /* relation file full */ #define RELCRE 7 /* error creating relation file */ #define DUPATT 8 /* duplicate attribute on relation create */ #define MAXATT 9 /* too many attributes on relation create */ #define INSBLK 10 /* insufficient disk blocks */ #define SYNTAX 11 /* command syntax error */ #define ATUNDF 12 /* attribute name undefined */ #define ATAMBG 13 /* attribute name ambiguous */ #define RLUNDF 14 /* relation name undefined */ #define CDSIZE 15 /* boolean expression code too big */ #define INPFNF 16 /* input file not found */ #define OUTCRE 17 /* output file creation error */ #define INDFNF 18 /* indirect command file not found */ #define BADSET 19 /* bad set parameter */ struct attribute { char at_name[ANSIZE]; /* attribute name */ char at_type; /* attribute type */ char at_size; /* attribute size in bytes */ char at_scale; /* attribute scale factor (for numeric only) */ char at_unused[ASIZE-ANSIZE-3]; /* unused space */ }; struct header { /* sizeof(struct header) must be 512 bytes */ char hd_tcnt[2]; /* # of tuples in relation */ char hd_tmax[2]; /* maximum # of tuples */ char hd_data[2]; /* offset to first data byte */ char hd_size[2]; /* size of each tuple in bytes */ char hd_unused[HSIZE-8]; /* unused space */ struct attribute hd_attrs[NATTRS]; /* table of attributes */ }; struct relation { char rl_name[RNSIZE]; /* relation name */ unsigned int rl_tcnt; /* # of tuples in relation (from hd_tcnt) */ unsigned int rl_tmax; /* maximum # of tuples (from hd_tmax) */ int rl_data; /* offset to first data byte (from hd_data) */ int rl_size; /* size of eachtuple in bytes (from hd_size) */ int rl_store; /* flag indicating a store happened */ int rl_fd; /* file descriptor for relation file */ int rl_scnref; /* number of scans referencing this relation */ struct header rl_header; /* the relation file header block */ struct relation *rl_next; /* pointer to next relation */ }; struct scan { struct relation *sc_relation; /* pointer to relation definition */ unsigned int sc_dtnum; /* desired tuple number */ unsigned int sc_atnum; /* actual tuple number */ int sc_store; /* flag indicating a store happened */ char *sc_tuple; /* tuple buffer */ }; struct srel { char *sr_name; /* alternate relation name */ struct scan *sr_scan; /* relation scan structure ptr */ int sr_ctuple; /* current tuple flag */ int sr_update; /* updated tuple flag */ struct srel *sr_next; /* next selected relation in list */ }; struct sattr { char *sa_rname; /* relation name */ char *sa_aname; /* attribute name */ char *sa_name; /* alternate attribute name */ char *sa_aptr; /* pointer to attr in tuple buffer */ struct srel *sa_srel; /* pointer to the selected relation */ struct attribute *sa_attr; /* attribute structure ptr */ struct sattr *sa_next; /* next selected attribute in list */ }; struct operand { int o_type; union { struct { int ovc_type; char *ovc_string; int ovc_length; } ov_char; int ov_boolean; } o_value; }; union codecell { int (*c_operator)(); struct operand *c_operand; }; struct binding { struct attribute *bd_attr; /* bound attribute */ char *bd_vtuple; /* pointer to value in tuple */ char *bd_vuser; /* pointer to user buffer */ struct binding *bd_next; /* next binding */ }; struct sel { struct srel *sl_rels; /* selected relations */ struct sattr *sl_attrs; /* selected attributes */ union codecell *sl_where; /* where clause */ struct binding *sl_bindings; /* user variable bindings */ }; struct mtext { char *mt_text; struct mtext *mt_next; }; struct macro { char *mc_name; struct mtext *mc_mtext; struct macro *mc_next; }; struct ifile { char *if_fp; struct mtext *if_mtext; char *if_cmdline; int if_savech; char *if_lptr; struct ifile *if_next; }; struct skey { int sk_type; struct attribute *sk_aptr; int sk_start; struct skey *sk_next; };