160 lines
5.6 KiB
C
160 lines
5.6 KiB
C
#define P1_UNKNOWN 0
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#define P1_COMMENT 1 /* Fortan comment string */
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#define P1_EOF 2 /* End of file dummy token */
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#define P1_SET_LINE 3 /* Reset the line counter */
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#define P1_FILENAME 4 /* Name of current input file */
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#define P1_NAME_POINTER 5 /* Pointer to hash table entry */
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#define P1_CONST 6 /* Some constant value */
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#define P1_EXPR 7 /* Followed by opcode */
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/* The next two tokens could be grouped together, since they always come
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from an Addr structure */
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#define P1_IDENT 8 /* Char string identifier in addrp->user
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field */
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#define P1_EXTERN 9 /* Pointer to external symbol entry */
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#define P1_HEAD 10 /* Function header info */
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#define P1_LIST 11 /* A list of data (e.g. arguments) will
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follow the tag, type, and count */
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#define P1_LITERAL 12 /* Hold the index into the literal pool */
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#define P1_LABEL 13 /* label value */
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#define P1_ASGOTO 14 /* Store the hash table pointer of
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variable used in assigned goto */
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#define P1_GOTO 15 /* Store the statement number */
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#define P1_IF 16 /* store the condition as an expression */
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#define P1_ELSE 17 /* No data */
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#define P1_ELIF 18 /* store the condition as an expression */
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#define P1_ENDIF 19 /* Marks the end of a block IF */
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#define P1_ENDELSE 20 /* Marks the end of a block ELSE */
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#define P1_ADDR 21 /* Addr data; used for arrays, common and
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equiv addressing, NOT for names, idents
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or externs */
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#define P1_SUBR_RET 22 /* Subroutine return; the return expression
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follows */
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#define P1_COMP_GOTO 23 /* Computed goto; has expr, label list */
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#define P1_FOR 24 /* C FOR loop; three expressions follow */
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#define P1_ENDFOR 25 /* End of C FOR loop */
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#define P1_FORTRAN 26 /* original Fortran source */
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#define P1_CHARP 27 /* user.Charp field -- for long names */
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#define P1_WHILE1START 28 /* start of DO WHILE */
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#define P1_WHILE2START 29 /* rest of DO WHILE */
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#define P1_PROCODE 30 /* invoke procode() -- to adjust params */
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#define P1_ELSEIFSTART 31 /* handle extra code for abs, min, max
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in else if() */
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#define P1_FILENAME_MAX 256 /* max filename length to retain (for -g) */
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#define P1_STMTBUFSIZE 1400
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#define COMMENT_BUFFER_SIZE 255 /* max number of chars in each comment */
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#define CONSTANT_STR_MAX 1000 /* max number of chars in string constant */
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extern void p1put (/* int */);
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extern void p1_comment (/* char * */);
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extern void p1_label (/* int */);
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extern void p1_line_number (/* int */);
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extern void p1put_filename();
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extern void p1_expr (/* expptr */);
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extern void p1_head (/* int, char * */);
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extern void p1_if (/* expptr */);
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extern void p1_else ();
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extern void p1_elif (/* expptr */);
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extern void p1_endif ();
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extern void p1else_end ();
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extern void p1_subr_ret (/* expptr */);
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extern void p1_goto(/* long */);
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extern void p1comp_goto (/* expptr, int, struct Labelblock *[] */);
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extern void p1_for (/* expptr, expptr, expptr */);
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extern void p1for_end ();
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extern void p1puts (/* int, char * */);
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/* The pass 1 intermediate file has the following format:
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<ascii-integer-rep> [ : [ <sp> [ <data> ]]] \n
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e.g. 1: This is a comment
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This format is destined to change in the future, but for now a readable
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form is more desirable than a compact form.
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NOTES ABOUT THE P1 FORMAT
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----------------------------------------------------------------------
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P1_COMMENT: The comment string (in <data>) may be at most
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COMMENT_BUFFER_SIZE bytes long. It must contain no newlines
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or null characters. A side effect of the way comments are
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read in lex.c is that no '\377' chars may be in a
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comment either.
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P1_SET_LINE: <data> holds the line number in the current source file.
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P1_INC_LINE: Increment the source line number; <data> is empty.
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P1_NAME_POINTER: <data> holds the integer representation of a
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pointer into a hash table entry.
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P1_CONST: the first field in <data> is a type tag (one of the
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TYxxxx macros), the next field holds the constant
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value
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P1_EXPR: <data> holds the opcode number of the expression,
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followed by the type of the expression (required for
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OPCONV). Next is the value of vleng.
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The type of operation represented by the
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opcode determines how many of the following data items
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are part of this expression.
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P1_IDENT: <data> holds the type, then storage, then the
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char string identifier in the addrp->user field.
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P1_EXTERN: <data> holds an offset into the external symbol
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table entry
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P1_HEAD: the first field in <data> is the procedure class, the
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second is the name of the procedure
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P1_LIST: the first field in <data> is the tag, the second the
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type of the list, the third the number of elements in
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the list
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P1_LITERAL: <data> holds the litnum of a value in the
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literal pool.
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P1_LABEL: <data> holds the statement number of the current
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line
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P1_ASGOTO: <data> holds the hash table pointer of the variable
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P1_GOTO: <data> holds the statement number to jump to
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P1_IF: <data> is empty, the following expression is the IF
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condition.
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P1_ELSE: <data> is empty.
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P1_ELIF: <data> is empty, the following expression is the IF
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condition.
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P1_ENDIF: <data> is empty.
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P1_ENDELSE: <data> is empty.
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P1_ADDR: <data> holds a direct copy of the structure. The
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next expression is a copy of vleng, and the next a
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copy of memoffset.
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P1_SUBR_RET: The next token is an expression for the return value.
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P1_COMP_GOTO: The next token is an integer expression, the
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following one a list of labels.
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P1_FOR: The next three expressions are the Init, Test, and
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Increment expressions of a C FOR loop.
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P1_ENDFOR: Marks the end of the body of a FOR loop
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*/
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