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[unix-history] / usr / src / cmd / c / c05.c

#
#include "c0.h"
/*
*  info on operators:
*   01-- is binary operator
*   02-- left (or only) operand must be lvalue
*   04-- is relational operator
*  010-- is assignment-type operator
*  020-- non-float req. on left
*  040-- non-float req. on right
* 0100-- is commutative
* 0200-- is right, not left-associative
* 0400-- is leaf of tree
* *0XX000-- XX is priority of operator
*/
int opdope[] {
       000000, /* EOFC */
       000000, /* ; */
       000000, /* { */
       000000, /* } */
       036000, /* [ */
       002000, /* ] */
       037000, /* ( */
       002000, /* ) */
       014201, /* : */
       007001, /* , */
       000001, /* field selection */
       034201, /* CAST */
       000000, /* ETYPE */
       000001, /* integer->ptr */
       000001, /* ptr->integer */
       000001, /* long->ptr */
       000000, /* 16 */
       000000, /* 17 */
       000000, /* 18 */
       000000, /* 19 */
       000400, /* name */
       000400, /* short constant */
       000400, /* string */
       000400, /* float */
       000400, /* double */
       000400, /* long constant */
       000400, /* long constant <= 16 bits */
       000000, /* 27 */
       000000, /* 28 */
       000000, /* 29 */
       034203, /* ++pre */
       034203, /* --pre */
       034203, /* ++post */
       034203, /* --post */
       034200, /* !un */
       034202, /* &un */
       034220, /* *un */
       034200, /* -un */
       034220, /* ~un */
       036001, /* . (structure reference) */
       030101, /* + */
       030001, /* - */
       032101, /* * */
       032001, /* / */
       032001, /* % */
       026061, /* >> */
       026061, /* << */
       020161, /* & */
       017161, /* | */
       017161, /* ^ */
       036001, /* -> */
       000000, /* int -> double */
       000000, /* double -> int */
       016001, /* && */
       015001, /* || */
       030001, /* &~ */
       000000, /* 56 */
       000000, /* 57 */
       000000, /* 58 */
       000000, /* 59 */
       022005, /* == */
       022005, /* != */
       024005, /* <= */
       024005, /* < */
       024005, /* >= */
       024005, /* > */
       024005, /* <p */
       024005, /* <=p */
       024005, /* >p */
       024005, /* >=p */
       012213, /* =+ */
       012213, /* =- */
       012213, /* =* */
       012213, /* =/ */
       012213, /* =% */
       012253, /* =>> */
       012253, /* =<< */
       012253, /* =& */
       012253, /* =| */
       012253, /* =^ */
       012213, /* = */
       000000, /* 81 */
       000000, /* 82 */
       000000, /* 83 */
       000000, /* 84 */
       000000, /* 85 */
       000000, /* 86 */
       000000, /* 87 */
       000000, /* 88 */
       000000, /* 89 */
       014201, /* ? */
       034200, /* sizeof */
       000000, /* 92 */
       021101, /* min */
       021101, /* minp */
       021101, /* max */
       021101, /* maxp */
       007001, /* , */
       000000, /* 98 */
       000000, /* 99 */
       036001, /* call */
       036001, /* mcall */
       000000, /* goto */
       000000, /* jump cond */
       000000, /* branch cond */
       000000, /* 105 */
       000000, /* 106 */
       000000, /* 107 */
       000000, /* 108 */
       000000, /* char->int */
       000000  /* force r0 */
};

/*
* conversion table:
* FTI: float (or double) to integer
* ITF: integer to float
* ITP: integer to pointer
* ITL: integer to long
* LTI: long to integer
* LTF: long to float
* FTL: float to long
* PTI: pointer to integer
* LTP: long to ptr (ptr[long])
* XX: usually illegal
* When FTI, LTI, FTL are added in they specify
* that it is the left operand that should be converted.
* For + this is done and the conversion is turned back into
* ITF, ITL, LTF.
* For = however the left operand can't be converted
* and the specified conversion is applied to the rhs.
*/
char cvtab[4][4] {
/*              int     double          long            ptr */
/* int */       0,      (FTI<<4)+ITF,   (LTI<<4)+ITL,   (ITP<<4)+ITP,   
/* double */    ITF,    0,              LTF,            XX,
/* long */      ITL,    (FTL<<4)+LTF,   0,              (LTP<<4)+LTP,
/* ptr */       ITP,    XX,             LTP,            PTI,
};

/*
* relate conversion numbers to operators
*/
char    cvntab[] {
       0, ITOF, ITOL, LTOF, ITOP, PTOI, FTOI, LTOI, FTOL, LTOP,
};

/*
* character type table
*/
char ctab[] {
       EOFC,   INSERT, UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
       UNKN,   SPACE,  NEWLN,  SPACE,  SPACE,  UNKN,   UNKN,   UNKN,
       UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
       UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,   UNKN,
       SPACE,  EXCLA,  DQUOTE, SHARP,  UNKN,   MOD,    AND,    SQUOTE,
       LPARN,  RPARN,  TIMES,  PLUS,   COMMA,  MINUS,  PERIOD, DIVIDE,
       DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,  DIGIT,
       DIGIT,  DIGIT,  COLON,  SEMI,   LESS,   ASSIGN, GREAT,  QUEST,
       UNKN,   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LBRACK, BSLASH, RBRACK, EXOR,   LETTER,
       UNKN,   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
       LETTER, LETTER, LETTER, LBRACE, OR,     RBRACE, COMPL,  UNKN
};