OS/2 Shareware BBS: 22 gnu/22-gnu.zip/fweb153.zip/fweb-1.53/web/ratfor0.web

Text File | 1995-09-23 | 2KB | 123 lines

@z --- ratfor0.web ---

FWEB version 1.53 (September 23, 1995)

Based on version 0.5 of S. Levy's CWEB [copyright (C) 1987 Princeton University]

@x-----------------------------------------------------------------------------

\Title{RATFOR0}

@c

@* RATFOR0.  The following routines are dummies, used when the full
\.{ratfor} package is't loaded.  To tell the make file not to load
\.{ratfor}, you say ``\.{make LOAD\_RATFOR=0 ftangle}'', or put the line
``\.{LOAD\_RATFOR=0}'' into \.{default.mk}.

@a
@<Include files@>@;
@<Prototypes@>@;
@<Global variables@>@;

@I typedefs.hweb

@
@<Proto...@>=

#include "c_type.h"

@ The following are dummies to make \FTANGLE\ happy.
@<Glob...@>=

sixteen_bits id_function,id_program,id_subroutine;
boolean balanced = YES;
ASCII cur_delim = '\0';


@ |common_init| calls this routine to set the flag |Rat_is_loaded|.  Note
that we allow \FWEAVE\ to process the |RATFOR| language even though
\FTANGLE\ may not be able to.
@a
SRTN is_Rat_present(VOID)
{
Rat_is_loaded = BOOLEAN(program==weave);
}

@ Various places in the code call this function to make sure we haven't
somehow gotten into \Ratfor\ by mistake when it's not loaded.
@a
boolean Rat_OK FCN((msg))
    outer_char *msg C1("")@;
{
if(Rat_is_loaded) return YES; /* We might get here by a call from
                \.{common} during \FWEAVE. */

err_print(R,"Ratfor is not loaded.  %s",msg);
return NO;
}

@ An error routine for this package; helps to trace confusion.

@d BAD_CALL(fcn_name) bad_call(OC(fcn_name))

@a
SRTN bad_call FCN((fcn_name))
    outer_char *fcn_name C1("")@;
{
CONFUSION(fcn_name,"This function shouldn't be called");
}

@ No memory allocations are needed when not loaded.
@a
SRTN alloc_Rat(VOID)
{}

@ Initializations are also moot.
@a
SRTN ini_Ratfor(VOID)
{}

@ Reserved words are stored only when the language is |RATFOR|, so this
shouldn't happen.
@a
SRTN ini_RAT_tokens FCN((language0))
    LANGUAGE language0 C1("")@;
{
if(Rat_is_loaded) return;
BAD_CALL("ini_RAT_tokens");
}

@ Should never be called.
@a
SRTN cp_fcn_body(VOID)
{
BAD_CALL("cp_fcn_body");
}

@ Likewise.
@a
int chk_lbl(VOID)
{
BAD_CALL("chk_lbl");
return -1; // Avoids spurious compiler warning.
}

@ Likewise.
@a
SRTN RAT_error(VOID)
{
BAD_CALL("RAT_error");
}

@ The |_DO| macro ought to transcend |RATFOR|, but it uses a bunch of
\Ratfor\ features.
@a
X_FCN x_unroll(VOID)
{
Rat_OK(OC("Therefore, the _DO macro cannot be used, since it relies on some \
Ratfor features (sorry)"));
}

@* INDEX.